Mercurial > hg > truffle
annotate src/share/vm/gc_implementation/g1/g1CollectedHeap.cpp @ 19083:09292c24d555
LSStackSlotAllocator: hide inner class.
author | Josef Eisl <josef.eisl@jku.at> |
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date | Sat, 31 Jan 2015 11:07:15 +0100 |
parents | 52b4284cb496 |
children | 7848fc12602b |
rev | line source |
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342 | 1 /* |
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2 * Copyright (c) 2001, 2014, Oracle and/or its affiliates. All rights reserved. |
342 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
4 * | |
5 * This code is free software; you can redistribute it and/or modify it | |
6 * under the terms of the GNU General Public License version 2 only, as | |
7 * published by the Free Software Foundation. | |
8 * | |
9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
12 * version 2 for more details (a copy is included in the LICENSE file that | |
13 * accompanied this code). | |
14 * | |
15 * You should have received a copy of the GNU General Public License version | |
16 * 2 along with this work; if not, write to the Free Software Foundation, | |
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
18 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
342 | 22 * |
23 */ | |
24 | |
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25 #if !defined(__clang_major__) && defined(__GNUC__) |
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26 #define ATTRIBUTE_PRINTF(x,y) // FIXME, formats are a mess. |
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27 #endif |
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28 |
1972 | 29 #include "precompiled.hpp" |
12080 | 30 #include "code/codeCache.hpp" |
1972 | 31 #include "code/icBuffer.hpp" |
32 #include "gc_implementation/g1/bufferingOopClosure.hpp" | |
33 #include "gc_implementation/g1/concurrentG1Refine.hpp" | |
34 #include "gc_implementation/g1/concurrentG1RefineThread.hpp" | |
35 #include "gc_implementation/g1/concurrentMarkThread.inline.hpp" | |
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36 #include "gc_implementation/g1/g1AllocRegion.inline.hpp" |
1972 | 37 #include "gc_implementation/g1/g1CollectedHeap.inline.hpp" |
38 #include "gc_implementation/g1/g1CollectorPolicy.hpp" | |
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39 #include "gc_implementation/g1/g1ErgoVerbose.hpp" |
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40 #include "gc_implementation/g1/g1EvacFailure.hpp" |
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41 #include "gc_implementation/g1/g1GCPhaseTimes.hpp" |
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42 #include "gc_implementation/g1/g1Log.hpp" |
1972 | 43 #include "gc_implementation/g1/g1MarkSweep.hpp" |
44 #include "gc_implementation/g1/g1OopClosures.inline.hpp" | |
45 #include "gc_implementation/g1/g1RemSet.inline.hpp" | |
17764 | 46 #include "gc_implementation/g1/g1StringDedup.hpp" |
10405 | 47 #include "gc_implementation/g1/g1YCTypes.hpp" |
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48 #include "gc_implementation/g1/heapRegion.inline.hpp" |
1972 | 49 #include "gc_implementation/g1/heapRegionRemSet.hpp" |
50 #include "gc_implementation/g1/heapRegionSeq.inline.hpp" | |
51 #include "gc_implementation/g1/vm_operations_g1.hpp" | |
10405 | 52 #include "gc_implementation/shared/gcHeapSummary.hpp" |
53 #include "gc_implementation/shared/gcTimer.hpp" | |
54 #include "gc_implementation/shared/gcTrace.hpp" | |
55 #include "gc_implementation/shared/gcTraceTime.hpp" | |
1972 | 56 #include "gc_implementation/shared/isGCActiveMark.hpp" |
57 #include "memory/gcLocker.inline.hpp" | |
58 #include "memory/generationSpec.hpp" | |
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59 #include "memory/iterator.hpp" |
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60 #include "memory/referenceProcessor.hpp" |
1972 | 61 #include "oops/oop.inline.hpp" |
62 #include "oops/oop.pcgc.inline.hpp" | |
63 #include "runtime/vmThread.hpp" | |
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64 #include "utilities/ticks.hpp" |
342 | 65 |
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66 size_t G1CollectedHeap::_humongous_object_threshold_in_words = 0; |
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67 |
342 | 68 // turn it on so that the contents of the young list (scan-only / |
69 // to-be-collected) are printed at "strategic" points before / during | |
70 // / after the collection --- this is useful for debugging | |
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71 #define YOUNG_LIST_VERBOSE 0 |
342 | 72 // CURRENT STATUS |
73 // This file is under construction. Search for "FIXME". | |
74 | |
75 // INVARIANTS/NOTES | |
76 // | |
77 // All allocation activity covered by the G1CollectedHeap interface is | |
1973 | 78 // serialized by acquiring the HeapLock. This happens in mem_allocate |
79 // and allocate_new_tlab, which are the "entry" points to the | |
80 // allocation code from the rest of the JVM. (Note that this does not | |
81 // apply to TLAB allocation, which is not part of this interface: it | |
82 // is done by clients of this interface.) | |
342 | 83 |
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84 // Notes on implementation of parallelism in different tasks. |
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85 // |
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86 // G1ParVerifyTask uses heap_region_par_iterate_chunked() for parallelism. |
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87 // The number of GC workers is passed to heap_region_par_iterate_chunked(). |
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88 // It does use run_task() which sets _n_workers in the task. |
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89 // G1ParTask executes g1_process_strong_roots() -> |
10405 | 90 // SharedHeap::process_strong_roots() which calls eventually to |
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91 // CardTableModRefBS::par_non_clean_card_iterate_work() which uses |
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92 // SequentialSubTasksDone. SharedHeap::process_strong_roots() also |
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93 // directly uses SubTasksDone (_process_strong_tasks field in SharedHeap). |
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94 // |
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95 |
342 | 96 // Local to this file. |
97 | |
98 class RefineCardTableEntryClosure: public CardTableEntryClosure { | |
99 SuspendibleThreadSet* _sts; | |
100 G1RemSet* _g1rs; | |
101 ConcurrentG1Refine* _cg1r; | |
102 bool _concurrent; | |
103 public: | |
104 RefineCardTableEntryClosure(SuspendibleThreadSet* sts, | |
105 G1RemSet* g1rs, | |
106 ConcurrentG1Refine* cg1r) : | |
107 _sts(sts), _g1rs(g1rs), _cg1r(cg1r), _concurrent(true) | |
108 {} | |
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109 bool do_card_ptr(jbyte* card_ptr, uint worker_i) { |
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110 bool oops_into_cset = _g1rs->refine_card(card_ptr, worker_i, false); |
1705 | 111 // This path is executed by the concurrent refine or mutator threads, |
112 // concurrently, and so we do not care if card_ptr contains references | |
113 // that point into the collection set. | |
114 assert(!oops_into_cset, "should be"); | |
115 | |
342 | 116 if (_concurrent && _sts->should_yield()) { |
117 // Caller will actually yield. | |
118 return false; | |
119 } | |
120 // Otherwise, we finished successfully; return true. | |
121 return true; | |
122 } | |
123 void set_concurrent(bool b) { _concurrent = b; } | |
124 }; | |
125 | |
126 | |
127 class ClearLoggedCardTableEntryClosure: public CardTableEntryClosure { | |
128 int _calls; | |
129 G1CollectedHeap* _g1h; | |
130 CardTableModRefBS* _ctbs; | |
131 int _histo[256]; | |
132 public: | |
133 ClearLoggedCardTableEntryClosure() : | |
12343 | 134 _calls(0), _g1h(G1CollectedHeap::heap()), _ctbs(_g1h->g1_barrier_set()) |
342 | 135 { |
136 for (int i = 0; i < 256; i++) _histo[i] = 0; | |
137 } | |
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138 bool do_card_ptr(jbyte* card_ptr, uint worker_i) { |
342 | 139 if (_g1h->is_in_reserved(_ctbs->addr_for(card_ptr))) { |
140 _calls++; | |
141 unsigned char* ujb = (unsigned char*)card_ptr; | |
142 int ind = (int)(*ujb); | |
143 _histo[ind]++; | |
144 *card_ptr = -1; | |
145 } | |
146 return true; | |
147 } | |
148 int calls() { return _calls; } | |
149 void print_histo() { | |
150 gclog_or_tty->print_cr("Card table value histogram:"); | |
151 for (int i = 0; i < 256; i++) { | |
152 if (_histo[i] != 0) { | |
153 gclog_or_tty->print_cr(" %d: %d", i, _histo[i]); | |
154 } | |
155 } | |
156 } | |
157 }; | |
158 | |
159 class RedirtyLoggedCardTableEntryClosure: public CardTableEntryClosure { | |
160 int _calls; | |
161 G1CollectedHeap* _g1h; | |
162 CardTableModRefBS* _ctbs; | |
163 public: | |
164 RedirtyLoggedCardTableEntryClosure() : | |
12343 | 165 _calls(0), _g1h(G1CollectedHeap::heap()), _ctbs(_g1h->g1_barrier_set()) {} |
166 | |
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167 bool do_card_ptr(jbyte* card_ptr, uint worker_i) { |
342 | 168 if (_g1h->is_in_reserved(_ctbs->addr_for(card_ptr))) { |
169 _calls++; | |
170 *card_ptr = 0; | |
171 } | |
172 return true; | |
173 } | |
174 int calls() { return _calls; } | |
175 }; | |
176 | |
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177 YoungList::YoungList(G1CollectedHeap* g1h) : |
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178 _g1h(g1h), _head(NULL), _length(0), _last_sampled_rs_lengths(0), |
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179 _survivor_head(NULL), _survivor_tail(NULL), _survivor_length(0) { |
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180 guarantee(check_list_empty(false), "just making sure..."); |
342 | 181 } |
182 | |
183 void YoungList::push_region(HeapRegion *hr) { | |
184 assert(!hr->is_young(), "should not already be young"); | |
185 assert(hr->get_next_young_region() == NULL, "cause it should!"); | |
186 | |
187 hr->set_next_young_region(_head); | |
188 _head = hr; | |
189 | |
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190 _g1h->g1_policy()->set_region_eden(hr, (int) _length); |
342 | 191 ++_length; |
192 } | |
193 | |
194 void YoungList::add_survivor_region(HeapRegion* hr) { | |
545 | 195 assert(hr->is_survivor(), "should be flagged as survivor region"); |
342 | 196 assert(hr->get_next_young_region() == NULL, "cause it should!"); |
197 | |
198 hr->set_next_young_region(_survivor_head); | |
199 if (_survivor_head == NULL) { | |
545 | 200 _survivor_tail = hr; |
342 | 201 } |
202 _survivor_head = hr; | |
203 ++_survivor_length; | |
204 } | |
205 | |
206 void YoungList::empty_list(HeapRegion* list) { | |
207 while (list != NULL) { | |
208 HeapRegion* next = list->get_next_young_region(); | |
209 list->set_next_young_region(NULL); | |
210 list->uninstall_surv_rate_group(); | |
211 list->set_not_young(); | |
212 list = next; | |
213 } | |
214 } | |
215 | |
216 void YoungList::empty_list() { | |
217 assert(check_list_well_formed(), "young list should be well formed"); | |
218 | |
219 empty_list(_head); | |
220 _head = NULL; | |
221 _length = 0; | |
222 | |
223 empty_list(_survivor_head); | |
224 _survivor_head = NULL; | |
545 | 225 _survivor_tail = NULL; |
342 | 226 _survivor_length = 0; |
227 | |
228 _last_sampled_rs_lengths = 0; | |
229 | |
230 assert(check_list_empty(false), "just making sure..."); | |
231 } | |
232 | |
233 bool YoungList::check_list_well_formed() { | |
234 bool ret = true; | |
235 | |
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236 uint length = 0; |
342 | 237 HeapRegion* curr = _head; |
238 HeapRegion* last = NULL; | |
239 while (curr != NULL) { | |
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240 if (!curr->is_young()) { |
342 | 241 gclog_or_tty->print_cr("### YOUNG REGION "PTR_FORMAT"-"PTR_FORMAT" " |
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242 "incorrectly tagged (y: %d, surv: %d)", |
342 | 243 curr->bottom(), curr->end(), |
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244 curr->is_young(), curr->is_survivor()); |
342 | 245 ret = false; |
246 } | |
247 ++length; | |
248 last = curr; | |
249 curr = curr->get_next_young_region(); | |
250 } | |
251 ret = ret && (length == _length); | |
252 | |
253 if (!ret) { | |
254 gclog_or_tty->print_cr("### YOUNG LIST seems not well formed!"); | |
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255 gclog_or_tty->print_cr("### list has %u entries, _length is %u", |
342 | 256 length, _length); |
257 } | |
258 | |
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259 return ret; |
342 | 260 } |
261 | |
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262 bool YoungList::check_list_empty(bool check_sample) { |
342 | 263 bool ret = true; |
264 | |
265 if (_length != 0) { | |
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266 gclog_or_tty->print_cr("### YOUNG LIST should have 0 length, not %u", |
342 | 267 _length); |
268 ret = false; | |
269 } | |
270 if (check_sample && _last_sampled_rs_lengths != 0) { | |
271 gclog_or_tty->print_cr("### YOUNG LIST has non-zero last sampled RS lengths"); | |
272 ret = false; | |
273 } | |
274 if (_head != NULL) { | |
275 gclog_or_tty->print_cr("### YOUNG LIST does not have a NULL head"); | |
276 ret = false; | |
277 } | |
278 if (!ret) { | |
279 gclog_or_tty->print_cr("### YOUNG LIST does not seem empty"); | |
280 } | |
281 | |
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282 return ret; |
342 | 283 } |
284 | |
285 void | |
286 YoungList::rs_length_sampling_init() { | |
287 _sampled_rs_lengths = 0; | |
288 _curr = _head; | |
289 } | |
290 | |
291 bool | |
292 YoungList::rs_length_sampling_more() { | |
293 return _curr != NULL; | |
294 } | |
295 | |
296 void | |
297 YoungList::rs_length_sampling_next() { | |
298 assert( _curr != NULL, "invariant" ); | |
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299 size_t rs_length = _curr->rem_set()->occupied(); |
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300 |
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301 _sampled_rs_lengths += rs_length; |
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302 |
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303 // The current region may not yet have been added to the |
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304 // incremental collection set (it gets added when it is |
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305 // retired as the current allocation region). |
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306 if (_curr->in_collection_set()) { |
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307 // Update the collection set policy information for this region |
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308 _g1h->g1_policy()->update_incremental_cset_info(_curr, rs_length); |
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309 } |
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310 |
342 | 311 _curr = _curr->get_next_young_region(); |
312 if (_curr == NULL) { | |
313 _last_sampled_rs_lengths = _sampled_rs_lengths; | |
314 // gclog_or_tty->print_cr("last sampled RS lengths = %d", _last_sampled_rs_lengths); | |
315 } | |
316 } | |
317 | |
318 void | |
319 YoungList::reset_auxilary_lists() { | |
320 guarantee( is_empty(), "young list should be empty" ); | |
321 assert(check_list_well_formed(), "young list should be well formed"); | |
322 | |
323 // Add survivor regions to SurvRateGroup. | |
324 _g1h->g1_policy()->note_start_adding_survivor_regions(); | |
545 | 325 _g1h->g1_policy()->finished_recalculating_age_indexes(true /* is_survivors */); |
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326 |
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327 int young_index_in_cset = 0; |
342 | 328 for (HeapRegion* curr = _survivor_head; |
329 curr != NULL; | |
330 curr = curr->get_next_young_region()) { | |
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331 _g1h->g1_policy()->set_region_survivor(curr, young_index_in_cset); |
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332 |
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333 // The region is a non-empty survivor so let's add it to |
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334 // the incremental collection set for the next evacuation |
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335 // pause. |
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336 _g1h->g1_policy()->add_region_to_incremental_cset_rhs(curr); |
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337 young_index_in_cset += 1; |
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338 } |
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339 assert((uint) young_index_in_cset == _survivor_length, "post-condition"); |
342 | 340 _g1h->g1_policy()->note_stop_adding_survivor_regions(); |
341 | |
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342 _head = _survivor_head; |
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343 _length = _survivor_length; |
342 | 344 if (_survivor_head != NULL) { |
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345 assert(_survivor_tail != NULL, "cause it shouldn't be"); |
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346 assert(_survivor_length > 0, "invariant"); |
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347 _survivor_tail->set_next_young_region(NULL); |
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348 } |
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349 |
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350 // Don't clear the survivor list handles until the start of |
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351 // the next evacuation pause - we need it in order to re-tag |
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352 // the survivor regions from this evacuation pause as 'young' |
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353 // at the start of the next. |
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354 |
545 | 355 _g1h->g1_policy()->finished_recalculating_age_indexes(false /* is_survivors */); |
342 | 356 |
357 assert(check_list_well_formed(), "young list should be well formed"); | |
358 } | |
359 | |
360 void YoungList::print() { | |
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361 HeapRegion* lists[] = {_head, _survivor_head}; |
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362 const char* names[] = {"YOUNG", "SURVIVOR"}; |
342 | 363 |
364 for (unsigned int list = 0; list < ARRAY_SIZE(lists); ++list) { | |
365 gclog_or_tty->print_cr("%s LIST CONTENTS", names[list]); | |
366 HeapRegion *curr = lists[list]; | |
367 if (curr == NULL) | |
368 gclog_or_tty->print_cr(" empty"); | |
369 while (curr != NULL) { | |
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370 gclog_or_tty->print_cr(" "HR_FORMAT", P: "PTR_FORMAT "N: "PTR_FORMAT", age: %4d", |
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371 HR_FORMAT_PARAMS(curr), |
342 | 372 curr->prev_top_at_mark_start(), |
373 curr->next_top_at_mark_start(), | |
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374 curr->age_in_surv_rate_group_cond()); |
342 | 375 curr = curr->get_next_young_region(); |
376 } | |
377 } | |
378 | |
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379 gclog_or_tty->cr(); |
342 | 380 } |
381 | |
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382 void G1CollectedHeap::push_dirty_cards_region(HeapRegion* hr) |
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383 { |
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384 // Claim the right to put the region on the dirty cards region list |
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385 // by installing a self pointer. |
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386 HeapRegion* next = hr->get_next_dirty_cards_region(); |
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387 if (next == NULL) { |
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388 HeapRegion* res = (HeapRegion*) |
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389 Atomic::cmpxchg_ptr(hr, hr->next_dirty_cards_region_addr(), |
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390 NULL); |
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391 if (res == NULL) { |
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392 HeapRegion* head; |
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393 do { |
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394 // Put the region to the dirty cards region list. |
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395 head = _dirty_cards_region_list; |
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396 next = (HeapRegion*) |
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397 Atomic::cmpxchg_ptr(hr, &_dirty_cards_region_list, head); |
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398 if (next == head) { |
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399 assert(hr->get_next_dirty_cards_region() == hr, |
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400 "hr->get_next_dirty_cards_region() != hr"); |
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401 if (next == NULL) { |
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402 // The last region in the list points to itself. |
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403 hr->set_next_dirty_cards_region(hr); |
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404 } else { |
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405 hr->set_next_dirty_cards_region(next); |
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406 } |
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407 } |
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408 } while (next != head); |
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409 } |
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410 } |
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411 } |
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412 |
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413 HeapRegion* G1CollectedHeap::pop_dirty_cards_region() |
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414 { |
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415 HeapRegion* head; |
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416 HeapRegion* hr; |
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417 do { |
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418 head = _dirty_cards_region_list; |
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419 if (head == NULL) { |
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420 return NULL; |
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421 } |
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422 HeapRegion* new_head = head->get_next_dirty_cards_region(); |
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423 if (head == new_head) { |
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424 // The last region. |
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425 new_head = NULL; |
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426 } |
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427 hr = (HeapRegion*)Atomic::cmpxchg_ptr(new_head, &_dirty_cards_region_list, |
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428 head); |
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429 } while (hr != head); |
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430 assert(hr != NULL, "invariant"); |
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431 hr->set_next_dirty_cards_region(NULL); |
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432 return hr; |
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433 } |
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434 |
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435 #ifdef ASSERT |
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436 // A region is added to the collection set as it is retired |
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437 // so an address p can point to a region which will be in the |
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438 // collection set but has not yet been retired. This method |
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439 // therefore is only accurate during a GC pause after all |
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440 // regions have been retired. It is used for debugging |
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441 // to check if an nmethod has references to objects that can |
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442 // be move during a partial collection. Though it can be |
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443 // inaccurate, it is sufficient for G1 because the conservative |
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444 // implementation of is_scavengable() for G1 will indicate that |
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445 // all nmethods must be scanned during a partial collection. |
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446 bool G1CollectedHeap::is_in_partial_collection(const void* p) { |
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447 HeapRegion* hr = heap_region_containing(p); |
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448 return hr != NULL && hr->in_collection_set(); |
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449 } |
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450 #endif |
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451 |
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452 // Returns true if the reference points to an object that |
10405 | 453 // can move in an incremental collection. |
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454 bool G1CollectedHeap::is_scavengable(const void* p) { |
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455 G1CollectedHeap* g1h = G1CollectedHeap::heap(); |
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456 G1CollectorPolicy* g1p = g1h->g1_policy(); |
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457 HeapRegion* hr = heap_region_containing(p); |
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458 if (hr == NULL) { |
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459 // null |
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460 assert(p == NULL, err_msg("Not NULL " PTR_FORMAT ,p)); |
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461 return false; |
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462 } else { |
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463 return !hr->isHumongous(); |
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464 } |
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465 } |
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466 |
342 | 467 void G1CollectedHeap::check_ct_logs_at_safepoint() { |
468 DirtyCardQueueSet& dcqs = JavaThread::dirty_card_queue_set(); | |
12343 | 469 CardTableModRefBS* ct_bs = g1_barrier_set(); |
342 | 470 |
471 // Count the dirty cards at the start. | |
472 CountNonCleanMemRegionClosure count1(this); | |
473 ct_bs->mod_card_iterate(&count1); | |
474 int orig_count = count1.n(); | |
475 | |
476 // First clear the logged cards. | |
477 ClearLoggedCardTableEntryClosure clear; | |
478 dcqs.set_closure(&clear); | |
479 dcqs.apply_closure_to_all_completed_buffers(); | |
480 dcqs.iterate_closure_all_threads(false); | |
481 clear.print_histo(); | |
482 | |
483 // Now ensure that there's no dirty cards. | |
484 CountNonCleanMemRegionClosure count2(this); | |
485 ct_bs->mod_card_iterate(&count2); | |
486 if (count2.n() != 0) { | |
487 gclog_or_tty->print_cr("Card table has %d entries; %d originally", | |
488 count2.n(), orig_count); | |
489 } | |
490 guarantee(count2.n() == 0, "Card table should be clean."); | |
491 | |
492 RedirtyLoggedCardTableEntryClosure redirty; | |
493 JavaThread::dirty_card_queue_set().set_closure(&redirty); | |
494 dcqs.apply_closure_to_all_completed_buffers(); | |
495 dcqs.iterate_closure_all_threads(false); | |
496 gclog_or_tty->print_cr("Log entries = %d, dirty cards = %d.", | |
497 clear.calls(), orig_count); | |
498 guarantee(redirty.calls() == clear.calls(), | |
499 "Or else mechanism is broken."); | |
500 | |
501 CountNonCleanMemRegionClosure count3(this); | |
502 ct_bs->mod_card_iterate(&count3); | |
503 if (count3.n() != orig_count) { | |
504 gclog_or_tty->print_cr("Should have restored them all: orig = %d, final = %d.", | |
505 orig_count, count3.n()); | |
506 guarantee(count3.n() >= orig_count, "Should have restored them all."); | |
507 } | |
508 | |
509 JavaThread::dirty_card_queue_set().set_closure(_refine_cte_cl); | |
510 } | |
511 | |
512 // Private class members. | |
513 | |
514 G1CollectedHeap* G1CollectedHeap::_g1h; | |
515 | |
516 // Private methods. | |
517 | |
2152 | 518 HeapRegion* |
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519 G1CollectedHeap::new_region_try_secondary_free_list(bool is_old) { |
2152 | 520 MutexLockerEx x(SecondaryFreeList_lock, Mutex::_no_safepoint_check_flag); |
521 while (!_secondary_free_list.is_empty() || free_regions_coming()) { | |
522 if (!_secondary_free_list.is_empty()) { | |
523 if (G1ConcRegionFreeingVerbose) { | |
524 gclog_or_tty->print_cr("G1ConcRegionFreeing [region alloc] : " | |
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525 "secondary_free_list has %u entries", |
2152 | 526 _secondary_free_list.length()); |
527 } | |
528 // It looks as if there are free regions available on the | |
529 // secondary_free_list. Let's move them to the free_list and try | |
530 // again to allocate from it. | |
531 append_secondary_free_list(); | |
532 | |
533 assert(!_free_list.is_empty(), "if the secondary_free_list was not " | |
534 "empty we should have moved at least one entry to the free_list"); | |
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535 HeapRegion* res = _free_list.remove_region(is_old); |
2152 | 536 if (G1ConcRegionFreeingVerbose) { |
537 gclog_or_tty->print_cr("G1ConcRegionFreeing [region alloc] : " | |
538 "allocated "HR_FORMAT" from secondary_free_list", | |
539 HR_FORMAT_PARAMS(res)); | |
540 } | |
541 return res; | |
542 } | |
543 | |
10405 | 544 // Wait here until we get notified either when (a) there are no |
2152 | 545 // more free regions coming or (b) some regions have been moved on |
546 // the secondary_free_list. | |
547 SecondaryFreeList_lock->wait(Mutex::_no_safepoint_check_flag); | |
548 } | |
549 | |
550 if (G1ConcRegionFreeingVerbose) { | |
551 gclog_or_tty->print_cr("G1ConcRegionFreeing [region alloc] : " | |
552 "could not allocate from secondary_free_list"); | |
553 } | |
554 return NULL; | |
555 } | |
556 | |
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557 HeapRegion* G1CollectedHeap::new_region(size_t word_size, bool is_old, bool do_expand) { |
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558 assert(!isHumongous(word_size) || word_size <= HeapRegion::GrainWords, |
2152 | 559 "the only time we use this to allocate a humongous region is " |
560 "when we are allocating a single humongous region"); | |
561 | |
562 HeapRegion* res; | |
563 if (G1StressConcRegionFreeing) { | |
564 if (!_secondary_free_list.is_empty()) { | |
565 if (G1ConcRegionFreeingVerbose) { | |
566 gclog_or_tty->print_cr("G1ConcRegionFreeing [region alloc] : " | |
567 "forced to look at the secondary_free_list"); | |
568 } | |
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569 res = new_region_try_secondary_free_list(is_old); |
2152 | 570 if (res != NULL) { |
571 return res; | |
572 } | |
573 } | |
574 } | |
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575 |
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576 res = _free_list.remove_region(is_old); |
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577 |
2152 | 578 if (res == NULL) { |
579 if (G1ConcRegionFreeingVerbose) { | |
580 gclog_or_tty->print_cr("G1ConcRegionFreeing [region alloc] : " | |
581 "res == NULL, trying the secondary_free_list"); | |
582 } | |
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583 res = new_region_try_secondary_free_list(is_old); |
2152 | 584 } |
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585 if (res == NULL && do_expand && _expand_heap_after_alloc_failure) { |
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586 // Currently, only attempts to allocate GC alloc regions set |
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587 // do_expand to true. So, we should only reach here during a |
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588 // safepoint. If this assumption changes we might have to |
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589 // reconsider the use of _expand_heap_after_alloc_failure. |
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590 assert(SafepointSynchronize::is_at_safepoint(), "invariant"); |
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591 |
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592 ergo_verbose1(ErgoHeapSizing, |
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593 "attempt heap expansion", |
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594 ergo_format_reason("region allocation request failed") |
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595 ergo_format_byte("allocation request"), |
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596 word_size * HeapWordSize); |
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597 if (expand(word_size * HeapWordSize)) { |
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598 // Given that expand() succeeded in expanding the heap, and we |
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599 // always expand the heap by an amount aligned to the heap |
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600 // region size, the free list should in theory not be empty. |
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601 // In either case remove_region() will check for NULL. |
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602 res = _free_list.remove_region(is_old); |
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603 } else { |
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604 _expand_heap_after_alloc_failure = false; |
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605 } |
342 | 606 } |
607 return res; | |
608 } | |
609 | |
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610 uint G1CollectedHeap::humongous_obj_allocate_find_first(uint num_regions, |
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611 size_t word_size) { |
2361 | 612 assert(isHumongous(word_size), "word_size should be humongous"); |
613 assert(num_regions * HeapRegion::GrainWords >= word_size, "pre-condition"); | |
614 | |
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615 uint first = G1_NULL_HRS_INDEX; |
2152 | 616 if (num_regions == 1) { |
617 // Only one region to allocate, no need to go through the slower | |
10405 | 618 // path. The caller will attempt the expansion if this fails, so |
2152 | 619 // let's not try to expand here too. |
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620 HeapRegion* hr = new_region(word_size, true /* is_old */, false /* do_expand */); |
2152 | 621 if (hr != NULL) { |
622 first = hr->hrs_index(); | |
623 } else { | |
3766 | 624 first = G1_NULL_HRS_INDEX; |
2152 | 625 } |
626 } else { | |
627 // We can't allocate humongous regions while cleanupComplete() is | |
628 // running, since some of the regions we find to be empty might not | |
629 // yet be added to the free list and it is not straightforward to | |
630 // know which list they are on so that we can remove them. Note | |
631 // that we only need to do this if we need to allocate more than | |
632 // one region to satisfy the current humongous allocation | |
633 // request. If we are only allocating one region we use the common | |
634 // region allocation code (see above). | |
635 wait_while_free_regions_coming(); | |
2361 | 636 append_secondary_free_list_if_not_empty_with_lock(); |
2152 | 637 |
638 if (free_regions() >= num_regions) { | |
3766 | 639 first = _hrs.find_contiguous(num_regions); |
640 if (first != G1_NULL_HRS_INDEX) { | |
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641 for (uint i = first; i < first + num_regions; ++i) { |
3766 | 642 HeapRegion* hr = region_at(i); |
2152 | 643 assert(hr->is_empty(), "sanity"); |
2361 | 644 assert(is_on_master_free_list(hr), "sanity"); |
2152 | 645 hr->set_pending_removal(true); |
646 } | |
647 _free_list.remove_all_pending(num_regions); | |
648 } | |
649 } | |
650 } | |
651 return first; | |
652 } | |
653 | |
2361 | 654 HeapWord* |
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655 G1CollectedHeap::humongous_obj_allocate_initialize_regions(uint first, |
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656 uint num_regions, |
2361 | 657 size_t word_size) { |
3766 | 658 assert(first != G1_NULL_HRS_INDEX, "pre-condition"); |
2361 | 659 assert(isHumongous(word_size), "word_size should be humongous"); |
660 assert(num_regions * HeapRegion::GrainWords >= word_size, "pre-condition"); | |
661 | |
662 // Index of last region in the series + 1. | |
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663 uint last = first + num_regions; |
2361 | 664 |
665 // We need to initialize the region(s) we just discovered. This is | |
666 // a bit tricky given that it can happen concurrently with | |
667 // refinement threads refining cards on these regions and | |
668 // potentially wanting to refine the BOT as they are scanning | |
669 // those cards (this can happen shortly after a cleanup; see CR | |
670 // 6991377). So we have to set up the region(s) carefully and in | |
671 // a specific order. | |
672 | |
673 // The word size sum of all the regions we will allocate. | |
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674 size_t word_size_sum = (size_t) num_regions * HeapRegion::GrainWords; |
2361 | 675 assert(word_size <= word_size_sum, "sanity"); |
676 | |
677 // This will be the "starts humongous" region. | |
3766 | 678 HeapRegion* first_hr = region_at(first); |
2361 | 679 // The header of the new object will be placed at the bottom of |
680 // the first region. | |
681 HeapWord* new_obj = first_hr->bottom(); | |
682 // This will be the new end of the first region in the series that | |
10405 | 683 // should also match the end of the last region in the series. |
2361 | 684 HeapWord* new_end = new_obj + word_size_sum; |
685 // This will be the new top of the first region that will reflect | |
686 // this allocation. | |
687 HeapWord* new_top = new_obj + word_size; | |
688 | |
689 // First, we need to zero the header of the space that we will be | |
690 // allocating. When we update top further down, some refinement | |
691 // threads might try to scan the region. By zeroing the header we | |
692 // ensure that any thread that will try to scan the region will | |
693 // come across the zero klass word and bail out. | |
694 // | |
695 // NOTE: It would not have been correct to have used | |
696 // CollectedHeap::fill_with_object() and make the space look like | |
697 // an int array. The thread that is doing the allocation will | |
698 // later update the object header to a potentially different array | |
699 // type and, for a very short period of time, the klass and length | |
700 // fields will be inconsistent. This could cause a refinement | |
701 // thread to calculate the object size incorrectly. | |
702 Copy::fill_to_words(new_obj, oopDesc::header_size(), 0); | |
703 | |
704 // We will set up the first region as "starts humongous". This | |
705 // will also update the BOT covering all the regions to reflect | |
706 // that there is a single object that starts at the bottom of the | |
707 // first region. | |
708 first_hr->set_startsHumongous(new_top, new_end); | |
709 | |
710 // Then, if there are any, we will set up the "continues | |
711 // humongous" regions. | |
712 HeapRegion* hr = NULL; | |
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713 for (uint i = first + 1; i < last; ++i) { |
3766 | 714 hr = region_at(i); |
2361 | 715 hr->set_continuesHumongous(first_hr); |
716 } | |
717 // If we have "continues humongous" regions (hr != NULL), then the | |
718 // end of the last one should match new_end. | |
719 assert(hr == NULL || hr->end() == new_end, "sanity"); | |
720 | |
721 // Up to this point no concurrent thread would have been able to | |
722 // do any scanning on any region in this series. All the top | |
723 // fields still point to bottom, so the intersection between | |
724 // [bottom,top] and [card_start,card_end] will be empty. Before we | |
725 // update the top fields, we'll do a storestore to make sure that | |
726 // no thread sees the update to top before the zeroing of the | |
727 // object header and the BOT initialization. | |
728 OrderAccess::storestore(); | |
729 | |
730 // Now that the BOT and the object header have been initialized, | |
731 // we can update top of the "starts humongous" region. | |
732 assert(first_hr->bottom() < new_top && new_top <= first_hr->end(), | |
733 "new_top should be in this region"); | |
734 first_hr->set_top(new_top); | |
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735 if (_hr_printer.is_active()) { |
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736 HeapWord* bottom = first_hr->bottom(); |
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737 HeapWord* end = first_hr->orig_end(); |
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738 if ((first + 1) == last) { |
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739 // the series has a single humongous region |
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740 _hr_printer.alloc(G1HRPrinter::SingleHumongous, first_hr, new_top); |
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741 } else { |
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742 // the series has more than one humongous regions |
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743 _hr_printer.alloc(G1HRPrinter::StartsHumongous, first_hr, end); |
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744 } |
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745 } |
2361 | 746 |
747 // Now, we will update the top fields of the "continues humongous" | |
748 // regions. The reason we need to do this is that, otherwise, | |
749 // these regions would look empty and this will confuse parts of | |
750 // G1. For example, the code that looks for a consecutive number | |
751 // of empty regions will consider them empty and try to | |
752 // re-allocate them. We can extend is_empty() to also include | |
753 // !continuesHumongous(), but it is easier to just update the top | |
754 // fields here. The way we set top for all regions (i.e., top == | |
755 // end for all regions but the last one, top == new_top for the | |
756 // last one) is actually used when we will free up the humongous | |
757 // region in free_humongous_region(). | |
758 hr = NULL; | |
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759 for (uint i = first + 1; i < last; ++i) { |
3766 | 760 hr = region_at(i); |
2361 | 761 if ((i + 1) == last) { |
762 // last continues humongous region | |
763 assert(hr->bottom() < new_top && new_top <= hr->end(), | |
764 "new_top should fall on this region"); | |
765 hr->set_top(new_top); | |
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766 _hr_printer.alloc(G1HRPrinter::ContinuesHumongous, hr, new_top); |
2361 | 767 } else { |
768 // not last one | |
769 assert(new_top > hr->end(), "new_top should be above this region"); | |
770 hr->set_top(hr->end()); | |
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771 _hr_printer.alloc(G1HRPrinter::ContinuesHumongous, hr, hr->end()); |
2361 | 772 } |
773 } | |
774 // If we have continues humongous regions (hr != NULL), then the | |
775 // end of the last one should match new_end and its top should | |
776 // match new_top. | |
777 assert(hr == NULL || | |
778 (hr->end() == new_end && hr->top() == new_top), "sanity"); | |
779 | |
780 assert(first_hr->used() == word_size * HeapWordSize, "invariant"); | |
781 _summary_bytes_used += first_hr->used(); | |
782 _humongous_set.add(first_hr); | |
783 | |
784 return new_obj; | |
785 } | |
786 | |
342 | 787 // If could fit into free regions w/o expansion, try. |
788 // Otherwise, if can expand, do so. | |
789 // Otherwise, if using ex regions might help, try with ex given back. | |
1973 | 790 HeapWord* G1CollectedHeap::humongous_obj_allocate(size_t word_size) { |
2152 | 791 assert_heap_locked_or_at_safepoint(true /* should_be_vm_thread */); |
792 | |
793 verify_region_sets_optional(); | |
342 | 794 |
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795 size_t word_size_rounded = round_to(word_size, HeapRegion::GrainWords); |
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796 uint num_regions = (uint) (word_size_rounded / HeapRegion::GrainWords); |
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797 uint x_num = expansion_regions(); |
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798 uint fs = _hrs.free_suffix(); |
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799 uint first = humongous_obj_allocate_find_first(num_regions, word_size); |
3766 | 800 if (first == G1_NULL_HRS_INDEX) { |
2152 | 801 // The only thing we can do now is attempt expansion. |
6010
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802 if (fs + x_num >= num_regions) { |
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803 // If the number of regions we're trying to allocate for this |
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804 // object is at most the number of regions in the free suffix, |
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805 // then the call to humongous_obj_allocate_find_first() above |
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806 // should have succeeded and we wouldn't be here. |
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807 // |
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808 // We should only be trying to expand when the free suffix is |
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809 // not sufficient for the object _and_ we have some expansion |
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810 // room available. |
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811 assert(num_regions > fs, "earlier allocation should have succeeded"); |
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812 |
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813 ergo_verbose1(ErgoHeapSizing, |
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814 "attempt heap expansion", |
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815 ergo_format_reason("humongous allocation request failed") |
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816 ergo_format_byte("allocation request"), |
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817 word_size * HeapWordSize); |
2188
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818 if (expand((num_regions - fs) * HeapRegion::GrainBytes)) { |
3766 | 819 // Even though the heap was expanded, it might not have |
820 // reached the desired size. So, we cannot assume that the | |
821 // allocation will succeed. | |
2188
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822 first = humongous_obj_allocate_find_first(num_regions, word_size); |
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823 } |
2152 | 824 } |
825 } | |
826 | |
2361 | 827 HeapWord* result = NULL; |
3766 | 828 if (first != G1_NULL_HRS_INDEX) { |
2361 | 829 result = |
830 humongous_obj_allocate_initialize_regions(first, num_regions, word_size); | |
831 assert(result != NULL, "it should always return a valid result"); | |
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832 |
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833 // A successful humongous object allocation changes the used space |
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834 // information of the old generation so we need to recalculate the |
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835 // sizes and update the jstat counters here. |
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836 g1mm()->update_sizes(); |
2152 | 837 } |
838 | |
839 verify_region_sets_optional(); | |
2361 | 840 |
841 return result; | |
342 | 842 } |
843 | |
1973 | 844 HeapWord* G1CollectedHeap::allocate_new_tlab(size_t word_size) { |
845 assert_heap_not_locked_and_not_at_safepoint(); | |
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846 assert(!isHumongous(word_size), "we do not allow humongous TLABs"); |
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847 |
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848 unsigned int dummy_gc_count_before; |
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849 int dummy_gclocker_retry_count = 0; |
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850 return attempt_allocation(word_size, &dummy_gc_count_before, &dummy_gclocker_retry_count); |
342 | 851 } |
852 | |
853 HeapWord* | |
854 G1CollectedHeap::mem_allocate(size_t word_size, | |
1973 | 855 bool* gc_overhead_limit_was_exceeded) { |
856 assert_heap_not_locked_and_not_at_safepoint(); | |
342 | 857 |
10405 | 858 // Loop until the allocation is satisfied, or unsatisfied after GC. |
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859 for (int try_count = 1, gclocker_retry_count = 0; /* we'll return */; try_count += 1) { |
1973 | 860 unsigned int gc_count_before; |
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861 |
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862 HeapWord* result = NULL; |
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863 if (!isHumongous(word_size)) { |
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864 result = attempt_allocation(word_size, &gc_count_before, &gclocker_retry_count); |
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865 } else { |
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866 result = attempt_allocation_humongous(word_size, &gc_count_before, &gclocker_retry_count); |
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867 } |
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868 if (result != NULL) { |
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869 return result; |
342 | 870 } |
871 | |
872 // Create the garbage collection operation... | |
1973 | 873 VM_G1CollectForAllocation op(gc_count_before, word_size); |
342 | 874 // ...and get the VM thread to execute it. |
875 VMThread::execute(&op); | |
1973 | 876 |
877 if (op.prologue_succeeded() && op.pause_succeeded()) { | |
878 // If the operation was successful we'll return the result even | |
879 // if it is NULL. If the allocation attempt failed immediately | |
880 // after a Full GC, it's unlikely we'll be able to allocate now. | |
881 HeapWord* result = op.result(); | |
882 if (result != NULL && !isHumongous(word_size)) { | |
883 // Allocations that take place on VM operations do not do any | |
884 // card dirtying and we have to do it here. We only have to do | |
885 // this for non-humongous allocations, though. | |
886 dirty_young_block(result, word_size); | |
887 } | |
342 | 888 return result; |
1973 | 889 } else { |
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890 if (gclocker_retry_count > GCLockerRetryAllocationCount) { |
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891 return NULL; |
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892 } |
1973 | 893 assert(op.result() == NULL, |
894 "the result should be NULL if the VM op did not succeed"); | |
342 | 895 } |
896 | |
897 // Give a warning if we seem to be looping forever. | |
898 if ((QueuedAllocationWarningCount > 0) && | |
899 (try_count % QueuedAllocationWarningCount == 0)) { | |
1973 | 900 warning("G1CollectedHeap::mem_allocate retries %d times", try_count); |
342 | 901 } |
902 } | |
1973 | 903 |
904 ShouldNotReachHere(); | |
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905 return NULL; |
342 | 906 } |
907 | |
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908 HeapWord* G1CollectedHeap::attempt_allocation_slow(size_t word_size, |
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909 unsigned int *gc_count_before_ret, |
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910 int* gclocker_retry_count_ret) { |
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911 // Make sure you read the note in attempt_allocation_humongous(). |
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912 |
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913 assert_heap_not_locked_and_not_at_safepoint(); |
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914 assert(!isHumongous(word_size), "attempt_allocation_slow() should not " |
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915 "be called for humongous allocation requests"); |
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916 |
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917 // We should only get here after the first-level allocation attempt |
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918 // (attempt_allocation()) failed to allocate. |
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919 |
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920 // We will loop until a) we manage to successfully perform the |
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921 // allocation or b) we successfully schedule a collection which |
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922 // fails to perform the allocation. b) is the only case when we'll |
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923 // return NULL. |
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924 HeapWord* result = NULL; |
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925 for (int try_count = 1; /* we'll return */; try_count += 1) { |
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|
926 bool should_try_gc; |
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|
927 unsigned int gc_count_before; |
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|
928 |
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|
929 { |
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|
930 MutexLockerEx x(Heap_lock); |
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931 |
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932 result = _mutator_alloc_region.attempt_allocation_locked(word_size, |
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933 false /* bot_updates */); |
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934 if (result != NULL) { |
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|
935 return result; |
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|
936 } |
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|
937 |
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938 // If we reach here, attempt_allocation_locked() above failed to |
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939 // allocate a new region. So the mutator alloc region should be NULL. |
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940 assert(_mutator_alloc_region.get() == NULL, "only way to get here"); |
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941 |
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942 if (GC_locker::is_active_and_needs_gc()) { |
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943 if (g1_policy()->can_expand_young_list()) { |
3914
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944 // No need for an ergo verbose message here, |
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945 // can_expand_young_list() does this when it returns true. |
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946 result = _mutator_alloc_region.attempt_allocation_force(word_size, |
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|
947 false /* bot_updates */); |
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|
948 if (result != NULL) { |
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|
949 return result; |
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|
950 } |
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951 } |
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952 should_try_gc = false; |
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953 } else { |
6106
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954 // The GCLocker may not be active but the GCLocker initiated |
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955 // GC may not yet have been performed (GCLocker::needs_gc() |
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956 // returns true). In this case we do not try this GC and |
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957 // wait until the GCLocker initiated GC is performed, and |
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958 // then retry the allocation. |
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959 if (GC_locker::needs_gc()) { |
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960 should_try_gc = false; |
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|
961 } else { |
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962 // Read the GC count while still holding the Heap_lock. |
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963 gc_count_before = total_collections(); |
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964 should_try_gc = true; |
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965 } |
2433
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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 } |
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992 // The GCLocker is either active or the GCLocker initiated |
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993 // GC has not yet been performed. Stall until it is and |
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994 // then retry the allocation. |
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995 GC_locker::stall_until_clear(); |
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996 (*gclocker_retry_count_ret) += 1; |
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997 } |
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998 |
10405 | 999 // We can reach here if we were unsuccessful in scheduling a |
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1000 // collection (because another thread beat us to it) or if we were |
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1001 // stalled due to the GC locker. In either can we should retry the |
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1002 // allocation attempt in case another thread successfully |
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1003 // performed a collection and reclaimed enough space. We do the |
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1004 // first attempt (without holding the Heap_lock) here and the |
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1005 // follow-on attempt will be at the start of the next loop |
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1006 // iteration (after taking the Heap_lock). |
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1007 result = _mutator_alloc_region.attempt_allocation(word_size, |
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1008 false /* bot_updates */); |
5963
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1009 if (result != NULL) { |
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1010 return result; |
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1011 } |
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1012 |
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1013 // Give a warning if we seem to be looping forever. |
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1014 if ((QueuedAllocationWarningCount > 0) && |
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1015 (try_count % QueuedAllocationWarningCount == 0)) { |
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1016 warning("G1CollectedHeap::attempt_allocation_slow() " |
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1017 "retries %d times", try_count); |
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1018 } |
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1019 } |
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1020 |
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1021 ShouldNotReachHere(); |
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1022 return NULL; |
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1023 } |
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|
1024 |
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1025 HeapWord* G1CollectedHeap::attempt_allocation_humongous(size_t word_size, |
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1026 unsigned int * gc_count_before_ret, |
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1027 int* gclocker_retry_count_ret) { |
2433
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1028 // The structure of this method has a lot of similarities to |
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1029 // attempt_allocation_slow(). The reason these two were not merged |
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1030 // into a single one is that such a method would require several "if |
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1031 // allocation is not humongous do this, otherwise do that" |
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1032 // conditional paths which would obscure its flow. In fact, an early |
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1033 // version of this code did use a unified method which was harder to |
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1034 // follow and, as a result, it had subtle bugs that were hard to |
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1035 // track down. So keeping these two methods separate allows each to |
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1036 // be more readable. It will be good to keep these two in sync as |
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1037 // much as possible. |
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|
1038 |
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|
1039 assert_heap_not_locked_and_not_at_safepoint(); |
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|
1040 assert(isHumongous(word_size), "attempt_allocation_humongous() " |
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1041 "should only be called for humongous allocations"); |
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|
1042 |
4834
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|
1043 // Humongous objects can exhaust the heap quickly, so we should check if we |
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|
1044 // need to start a marking cycle at each humongous object allocation. We do |
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|
1045 // the check before we do the actual allocation. The reason for doing it |
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|
1046 // before the allocation is that we avoid having to keep track of the newly |
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|
1047 // allocated memory while we do a GC. |
4910
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|
1048 if (g1_policy()->need_to_start_conc_mark("concurrent humongous allocation", |
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|
1049 word_size)) { |
4834
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|
1050 collect(GCCause::_g1_humongous_allocation); |
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|
1051 } |
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|
1052 |
2433
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1053 // We will loop until a) we manage to successfully perform the |
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1054 // allocation or b) we successfully schedule a collection which |
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|
1055 // fails to perform the allocation. b) is the only case when we'll |
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|
1056 // return NULL. |
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|
1057 HeapWord* result = NULL; |
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|
1058 for (int try_count = 1; /* we'll return */; try_count += 1) { |
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|
1059 bool should_try_gc; |
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|
1060 unsigned int gc_count_before; |
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|
1061 |
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|
1062 { |
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|
1063 MutexLockerEx x(Heap_lock); |
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|
1064 |
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|
1065 // Given that humongous objects are not allocated in young |
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|
1066 // regions, we'll first try to do the allocation without doing a |
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1067 // collection hoping that there's enough space in the heap. |
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|
1068 result = humongous_obj_allocate(word_size); |
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|
1069 if (result != NULL) { |
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|
1070 return result; |
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|
1071 } |
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|
1072 |
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|
1073 if (GC_locker::is_active_and_needs_gc()) { |
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|
1074 should_try_gc = false; |
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|
1075 } else { |
6106
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|
1076 // The GCLocker may not be active but the GCLocker initiated |
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|
1077 // GC may not yet have been performed (GCLocker::needs_gc() |
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|
1078 // returns true). In this case we do not try this GC and |
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|
1079 // wait until the GCLocker initiated GC is performed, and |
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|
1080 // then retry the allocation. |
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|
1081 if (GC_locker::needs_gc()) { |
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|
1082 should_try_gc = false; |
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|
1083 } else { |
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|
1084 // Read the GC count while still holding the Heap_lock. |
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|
1085 gc_count_before = total_collections(); |
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|
1086 should_try_gc = true; |
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|
1087 } |
2433
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|
1088 } |
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|
1089 } |
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|
1090 |
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1091 if (should_try_gc) { |
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1092 // If we failed to allocate the humongous object, we should try to |
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1093 // do a collection pause (if we're allowed) in case it reclaims |
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1094 // enough space for the allocation to succeed after the pause. |
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1095 |
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1096 bool succeeded; |
12113
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1097 result = do_collection_pause(word_size, gc_count_before, &succeeded, |
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1098 GCCause::_g1_humongous_allocation); |
2433
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1099 if (result != NULL) { |
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1100 assert(succeeded, "only way to get back a non-NULL result"); |
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1101 return result; |
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1102 } |
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1103 |
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1104 if (succeeded) { |
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1105 // If we get here we successfully scheduled a collection which |
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1106 // failed to allocate. No point in trying to allocate |
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1107 // further. We'll just return NULL. |
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1108 MutexLockerEx x(Heap_lock); |
4910
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1109 *gc_count_before_ret = total_collections(); |
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1110 return NULL; |
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1111 } |
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1112 } else { |
8853
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1113 if (*gclocker_retry_count_ret > GCLockerRetryAllocationCount) { |
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1114 MutexLockerEx x(Heap_lock); |
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1115 *gc_count_before_ret = total_collections(); |
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1116 return NULL; |
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1117 } |
6106
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1118 // The GCLocker is either active or the GCLocker initiated |
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1119 // GC has not yet been performed. Stall until it is and |
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1120 // then retry the allocation. |
2433
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1121 GC_locker::stall_until_clear(); |
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1122 (*gclocker_retry_count_ret) += 1; |
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1123 } |
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1124 |
10405 | 1125 // We can reach here if we were unsuccessful in scheduling a |
2433
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1126 // collection (because another thread beat us to it) or if we were |
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1127 // stalled due to the GC locker. In either can we should retry the |
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1128 // allocation attempt in case another thread successfully |
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1129 // performed a collection and reclaimed enough space. Give a |
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1130 // warning if we seem to be looping forever. |
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1131 |
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1132 if ((QueuedAllocationWarningCount > 0) && |
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1133 (try_count % QueuedAllocationWarningCount == 0)) { |
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1134 warning("G1CollectedHeap::attempt_allocation_humongous() " |
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1135 "retries %d times", try_count); |
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1136 } |
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1137 } |
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1138 |
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1139 ShouldNotReachHere(); |
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1140 return NULL; |
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1141 } |
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1142 |
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1143 HeapWord* G1CollectedHeap::attempt_allocation_at_safepoint(size_t word_size, |
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1144 bool expect_null_mutator_alloc_region) { |
2152 | 1145 assert_at_safepoint(true /* should_be_vm_thread */); |
2433
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1146 assert(_mutator_alloc_region.get() == NULL || |
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1147 !expect_null_mutator_alloc_region, |
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1148 "the current alloc region was unexpectedly found to be non-NULL"); |
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1149 |
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1150 if (!isHumongous(word_size)) { |
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1151 return _mutator_alloc_region.attempt_allocation_locked(word_size, |
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1152 false /* bot_updates */); |
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1153 } else { |
4829
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1154 HeapWord* result = humongous_obj_allocate(word_size); |
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1155 if (result != NULL && g1_policy()->need_to_start_conc_mark("STW humongous allocation")) { |
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1156 g1_policy()->set_initiate_conc_mark_if_possible(); |
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1157 } |
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1158 return result; |
2433
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1159 } |
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1160 |
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1161 ShouldNotReachHere(); |
342 | 1162 } |
1163 | |
1164 class PostMCRemSetClearClosure: public HeapRegionClosure { | |
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1165 G1CollectedHeap* _g1h; |
342 | 1166 ModRefBarrierSet* _mr_bs; |
1167 public: | |
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1168 PostMCRemSetClearClosure(G1CollectedHeap* g1h, ModRefBarrierSet* mr_bs) : |
12080 | 1169 _g1h(g1h), _mr_bs(mr_bs) {} |
1170 | |
342 | 1171 bool doHeapRegion(HeapRegion* r) { |
12080 | 1172 HeapRegionRemSet* hrrs = r->rem_set(); |
1173 | |
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1174 if (r->continuesHumongous()) { |
12080 | 1175 // We'll assert that the strong code root list and RSet is empty |
1176 assert(hrrs->strong_code_roots_list_length() == 0, "sanity"); | |
1177 assert(hrrs->occupied() == 0, "RSet should be empty"); | |
342 | 1178 return false; |
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1179 } |
12080 | 1180 |
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1181 _g1h->reset_gc_time_stamps(r); |
12080 | 1182 hrrs->clear(); |
342 | 1183 // You might think here that we could clear just the cards |
1184 // corresponding to the used region. But no: if we leave a dirty card | |
1185 // in a region we might allocate into, then it would prevent that card | |
1186 // from being enqueued, and cause it to be missed. | |
1187 // Re: the performance cost: we shouldn't be doing full GC anyway! | |
1188 _mr_bs->clear(MemRegion(r->bottom(), r->end())); | |
12080 | 1189 |
342 | 1190 return false; |
1191 } | |
1192 }; | |
1193 | |
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1194 void G1CollectedHeap::clear_rsets_post_compaction() { |
12343 | 1195 PostMCRemSetClearClosure rs_clear(this, g1_barrier_set()); |
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1196 heap_region_iterate(&rs_clear); |
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1197 } |
342 | 1198 |
626
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1199 class RebuildRSOutOfRegionClosure: public HeapRegionClosure { |
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1200 G1CollectedHeap* _g1h; |
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|
1201 UpdateRSOopClosure _cl; |
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|
1202 int _worker_i; |
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|
1203 public: |
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|
1204 RebuildRSOutOfRegionClosure(G1CollectedHeap* g1, int worker_i = 0) : |
1861 | 1205 _cl(g1->g1_rem_set(), worker_i), |
626
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1206 _worker_i(worker_i), |
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1207 _g1h(g1) |
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1208 { } |
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|
1209 |
626
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1210 bool doHeapRegion(HeapRegion* r) { |
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1211 if (!r->continuesHumongous()) { |
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1212 _cl.set_from(r); |
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1213 r->oop_iterate(&_cl); |
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|
1214 } |
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1215 return false; |
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|
1216 } |
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|
1217 }; |
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1218 |
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1219 class ParRebuildRSTask: public AbstractGangTask { |
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1220 G1CollectedHeap* _g1; |
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1221 public: |
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1222 ParRebuildRSTask(G1CollectedHeap* g1) |
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1223 : AbstractGangTask("ParRebuildRSTask"), |
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1224 _g1(g1) |
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1225 { } |
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1226 |
4728
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1227 void work(uint worker_id) { |
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1228 RebuildRSOutOfRegionClosure rebuild_rs(_g1, worker_id); |
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1229 _g1->heap_region_par_iterate_chunked(&rebuild_rs, worker_id, |
4095
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1230 _g1->workers()->active_workers(), |
626
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|
1231 HeapRegion::RebuildRSClaimValue); |
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1232 } |
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1233 }; |
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1234 |
3778
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1235 class PostCompactionPrinterClosure: public HeapRegionClosure { |
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1236 private: |
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1237 G1HRPrinter* _hr_printer; |
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1238 public: |
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1239 bool doHeapRegion(HeapRegion* hr) { |
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1240 assert(!hr->is_young(), "not expecting to find young regions"); |
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1241 // We only generate output for non-empty regions. |
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1242 if (!hr->is_empty()) { |
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1243 if (!hr->isHumongous()) { |
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1244 _hr_printer->post_compaction(hr, G1HRPrinter::Old); |
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1245 } else if (hr->startsHumongous()) { |
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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 { |
10405 | 1308 GCTraceTime t(GCCauseString("Full GC", gc_cause()), G1Log::fine(), true, NULL); |
10098
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1309 TraceCollectorStats tcs(g1mm()->full_collection_counters()); |
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1310 TraceMemoryManagerStats tms(true /* fullGC */, gc_cause()); |
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1311 |
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1312 double start = os::elapsedTime(); |
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1313 g1_policy()->record_full_collection_start(); |
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1314 |
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1315 // Note: When we have a more flexible GC logging framework that |
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1316 // allows us to add optional attributes to a GC log record we |
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1317 // could consider timing and reporting how long we wait in the |
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1318 // following two methods. |
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1319 wait_while_free_regions_coming(); |
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1320 // If we start the compaction before the CM threads finish |
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1321 // scanning the root regions we might trip them over as we'll |
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1322 // be moving objects / updating references. So let's wait until |
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1323 // they are done. By telling them to abort, they should complete |
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1324 // early. |
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1325 _cm->root_regions()->abort(); |
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1326 _cm->root_regions()->wait_until_scan_finished(); |
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1327 append_secondary_free_list_if_not_empty_with_lock(); |
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1328 |
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1329 gc_prologue(true); |
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1330 increment_total_collections(true /* full gc */); |
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1331 increment_old_marking_cycles_started(); |
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|
1332 |
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|
1333 assert(used() == recalculate_used(), "Should be equal"); |
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1334 |
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1335 verify_before_gc(); |
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1336 |
10405 | 1337 pre_full_gc_dump(gc_timer); |
10098
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1338 |
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1339 COMPILER2_PRESENT(DerivedPointerTable::clear()); |
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1340 |
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1341 // Disable discovery and empty the discovered lists |
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1342 // for the CM ref processor. |
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|
1343 ref_processor_cm()->disable_discovery(); |
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1344 ref_processor_cm()->abandon_partial_discovery(); |
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1345 ref_processor_cm()->verify_no_references_recorded(); |
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|
1346 |
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1347 // Abandon current iterations of concurrent marking and concurrent |
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1348 // refinement, if any are in progress. We have to do this before |
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1349 // wait_until_scan_finished() below. |
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|
1350 concurrent_mark()->abort(); |
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|
1351 |
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1352 // Make sure we'll choose a new allocation region afterwards. |
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1353 release_mutator_alloc_region(); |
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|
1354 abandon_gc_alloc_regions(); |
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|
1355 g1_rem_set()->cleanupHRRS(); |
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|
1356 |
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1357 // We should call this after we retire any currently active alloc |
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1358 // regions so that all the ALLOC / RETIRE events are generated |
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1359 // before the start GC event. |
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|
1360 _hr_printer.start_gc(true /* full */, (size_t) total_collections()); |
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|
1361 |
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1362 // We may have added regions to the current incremental collection |
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1363 // set between the last GC or pause and now. We need to clear the |
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1364 // incremental collection set and then start rebuilding it afresh |
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|
1365 // after this full GC. |
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|
1366 abandon_collection_set(g1_policy()->inc_cset_head()); |
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1367 g1_policy()->clear_incremental_cset(); |
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1368 g1_policy()->stop_incremental_cset_building(); |
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1369 |
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1370 tear_down_region_sets(false /* free_list_only */); |
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1371 g1_policy()->set_gcs_are_young(true); |
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1372 |
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1373 // See the comments in g1CollectedHeap.hpp and |
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1374 // G1CollectedHeap::ref_processing_init() about |
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1375 // how reference processing currently works in G1. |
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|
1376 |
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1377 // Temporarily make discovery by the STW ref processor single threaded (non-MT). |
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|
1378 ReferenceProcessorMTDiscoveryMutator stw_rp_disc_ser(ref_processor_stw(), false); |
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1379 |
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1380 // Temporarily clear the STW ref processor's _is_alive_non_header field. |
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1381 ReferenceProcessorIsAliveMutator stw_rp_is_alive_null(ref_processor_stw(), NULL); |
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1382 |
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1383 ref_processor_stw()->enable_discovery(true /*verify_disabled*/, true /*verify_no_refs*/); |
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1384 ref_processor_stw()->setup_policy(do_clear_all_soft_refs); |
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1385 |
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|
1386 // Do collection work |
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|
1387 { |
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|
1388 HandleMark hm; // Discard invalid handles created during gc |
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1389 G1MarkSweep::invoke_at_safepoint(ref_processor_stw(), do_clear_all_soft_refs); |
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1390 } |
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|
1391 |
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1392 assert(free_regions() == 0, "we should not have added any free regions"); |
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1393 rebuild_region_sets(false /* free_list_only */); |
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|
1394 |
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1395 // Enqueue any discovered reference objects that have |
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1396 // not been removed from the discovered lists. |
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1397 ref_processor_stw()->enqueue_discovered_references(); |
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|
1398 |
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|
1399 COMPILER2_PRESENT(DerivedPointerTable::update_pointers()); |
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1400 |
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1401 MemoryService::track_memory_usage(); |
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1402 |
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1403 assert(!ref_processor_stw()->discovery_enabled(), "Postcondition"); |
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1404 ref_processor_stw()->verify_no_references_recorded(); |
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1405 |
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1406 // Delete metaspaces for unloaded class loaders and clean up loader_data graph |
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1407 ClassLoaderDataGraph::purge(); |
12080 | 1408 MetaspaceAux::verify_metrics(); |
10098
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1409 |
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1410 // Note: since we've just done a full GC, concurrent |
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1411 // marking is no longer active. Therefore we need not |
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1412 // re-enable reference discovery for the CM ref processor. |
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1413 // That will be done at the start of the next marking cycle. |
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1414 assert(!ref_processor_cm()->discovery_enabled(), "Postcondition"); |
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1415 ref_processor_cm()->verify_no_references_recorded(); |
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1416 |
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1417 reset_gc_time_stamp(); |
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1418 // Since everything potentially moved, we will clear all remembered |
10405 | 1419 // sets, and clear all cards. Later we will rebuild remembered |
10098
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1420 // sets. We will also reset the GC time stamps of the regions. |
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1421 clear_rsets_post_compaction(); |
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|
1422 check_gc_time_stamps(); |
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|
1423 |
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|
1424 // Resize the heap if necessary. |
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1425 resize_if_necessary_after_full_collection(explicit_gc ? 0 : word_size); |
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1426 |
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|
1427 if (_hr_printer.is_active()) { |
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1428 // We should do this after we potentially resize the heap so |
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1429 // that all the COMMIT / UNCOMMIT events are generated before |
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1430 // the end GC event. |
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|
1431 |
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|
1432 print_hrs_post_compaction(); |
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|
1433 _hr_printer.end_gc(true /* full */, (size_t) total_collections()); |
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|
1434 } |
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|
1435 |
10246
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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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545
diff
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|
1486 #ifdef TRACESPINNING |
10098
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|
1487 ParallelTaskTerminator::print_termination_counts(); |
546
05c6d52fa7a9
6690928: Use spinning in combination with yields for workstealing termination.
jmasa
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545
diff
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|
1488 #endif |
05c6d52fa7a9
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jmasa
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545
diff
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|
1489 |
10098
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|
1490 // Discard all rset updates |
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|
1491 JavaThread::dirty_card_queue_set().abandon_logs(); |
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|
1492 assert(!G1DeferredRSUpdate |
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1493 || (G1DeferredRSUpdate && |
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|
1494 (dirty_card_queue_set().completed_buffers_num() == 0)), "Should not be any"); |
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|
1495 |
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|
1496 _young_list->reset_sampled_info(); |
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1497 // At this point there should be no regions in the |
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|
1498 // entire heap tagged as young. |
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|
1499 assert(check_young_list_empty(true /* check_heap */), |
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|
1500 "young list should be empty at this point"); |
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|
1501 |
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|
1502 // Update the number of full collections that have been completed. |
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|
1503 increment_old_marking_cycles_completed(false /* concurrent */); |
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|
1504 |
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|
1505 _hrs.verify_optional(); |
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|
1506 verify_region_sets_optional(); |
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1507 |
10373
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1508 verify_after_gc(); |
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1509 |
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1510 // Start a new incremental collection set for the next pause |
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1511 assert(g1_policy()->collection_set() == NULL, "must be"); |
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1512 g1_policy()->start_incremental_cset_building(); |
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1513 |
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1514 // Clear the _cset_fast_test bitmap in anticipation of adding |
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1515 // regions to the incremental collection set for the next |
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1516 // evacuation pause. |
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1517 clear_cset_fast_test(); |
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1518 |
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1519 init_mutator_alloc_region(); |
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1520 |
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1521 double end = os::elapsedTime(); |
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1522 g1_policy()->record_full_collection_end(); |
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1523 |
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1524 if (G1Log::fine()) { |
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1525 g1_policy()->print_heap_transition(); |
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1526 } |
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1527 |
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1528 // We must call G1MonitoringSupport::update_sizes() in the same scoping level |
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1529 // as an active TraceMemoryManagerStats object (i.e. before the destructor for the |
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1530 // TraceMemoryManagerStats is called) so that the G1 memory pools are updated |
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1531 // before any GC notifications are raised. |
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1532 g1mm()->update_sizes(); |
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1533 |
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1534 gc_epilogue(true); |
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1535 } |
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1536 |
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1537 if (G1Log::finer()) { |
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1538 g1_policy()->print_detailed_heap_transition(true /* full */); |
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1539 } |
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1540 |
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1541 print_heap_after_gc(); |
10405 | 1542 trace_heap_after_gc(gc_tracer); |
1543 | |
1544 post_full_gc_dump(gc_timer); | |
1545 | |
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1546 gc_timer->register_gc_end(); |
10405 | 1547 gc_tracer->report_gc_end(gc_timer->gc_end(), gc_timer->time_partitions()); |
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1548 } |
1973 | 1549 |
1550 return true; | |
342 | 1551 } |
1552 | |
1553 void G1CollectedHeap::do_full_collection(bool clear_all_soft_refs) { | |
1973 | 1554 // do_collection() will return whether it succeeded in performing |
1555 // the GC. Currently, there is no facility on the | |
1556 // do_full_collection() API to notify the caller than the collection | |
1557 // did not succeed (e.g., because it was locked out by the GC | |
1558 // locker). So, right now, we'll ignore the return value. | |
1559 bool dummy = do_collection(true, /* explicit_gc */ | |
1560 clear_all_soft_refs, | |
1561 0 /* word_size */); | |
342 | 1562 } |
1563 | |
1564 // This code is mostly copied from TenuredGeneration. | |
1565 void | |
1566 G1CollectedHeap:: | |
1567 resize_if_necessary_after_full_collection(size_t word_size) { | |
1568 // Include the current allocation, if any, and bytes that will be | |
1569 // pre-allocated to support collections, as "used". | |
1570 const size_t used_after_gc = used(); | |
1571 const size_t capacity_after_gc = capacity(); | |
1572 const size_t free_after_gc = capacity_after_gc - used_after_gc; | |
1573 | |
1717
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1574 // This is enforced in arguments.cpp. |
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1575 assert(MinHeapFreeRatio <= MaxHeapFreeRatio, |
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1576 "otherwise the code below doesn't make sense"); |
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1577 |
342 | 1578 // We don't have floating point command-line arguments |
1717
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1579 const double minimum_free_percentage = (double) MinHeapFreeRatio / 100.0; |
342 | 1580 const double maximum_used_percentage = 1.0 - minimum_free_percentage; |
1717
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1581 const double maximum_free_percentage = (double) MaxHeapFreeRatio / 100.0; |
342 | 1582 const double minimum_used_percentage = 1.0 - maximum_free_percentage; |
1583 | |
1717
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1584 const size_t min_heap_size = collector_policy()->min_heap_byte_size(); |
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1585 const size_t max_heap_size = collector_policy()->max_heap_byte_size(); |
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1586 |
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1587 // We have to be careful here as these two calculations can overflow |
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1588 // 32-bit size_t's. |
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1589 double used_after_gc_d = (double) used_after_gc; |
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1590 double minimum_desired_capacity_d = used_after_gc_d / maximum_used_percentage; |
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1591 double maximum_desired_capacity_d = used_after_gc_d / minimum_used_percentage; |
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1592 |
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1593 // Let's make sure that they are both under the max heap size, which |
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1594 // by default will make them fit into a size_t. |
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1595 double desired_capacity_upper_bound = (double) max_heap_size; |
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1596 minimum_desired_capacity_d = MIN2(minimum_desired_capacity_d, |
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1597 desired_capacity_upper_bound); |
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1598 maximum_desired_capacity_d = MIN2(maximum_desired_capacity_d, |
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1599 desired_capacity_upper_bound); |
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1600 |
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1601 // We can now safely turn them into size_t's. |
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1602 size_t minimum_desired_capacity = (size_t) minimum_desired_capacity_d; |
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1603 size_t maximum_desired_capacity = (size_t) maximum_desired_capacity_d; |
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1604 |
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1605 // This assert only makes sense here, before we adjust them |
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1606 // with respect to the min and max heap size. |
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1607 assert(minimum_desired_capacity <= maximum_desired_capacity, |
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1608 err_msg("minimum_desired_capacity = "SIZE_FORMAT", " |
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1609 "maximum_desired_capacity = "SIZE_FORMAT, |
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1610 minimum_desired_capacity, maximum_desired_capacity)); |
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1611 |
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1612 // Should not be greater than the heap max size. No need to adjust |
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1613 // it with respect to the heap min size as it's a lower bound (i.e., |
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1614 // we'll try to make the capacity larger than it, not smaller). |
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1615 minimum_desired_capacity = MIN2(minimum_desired_capacity, max_heap_size); |
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1616 // Should not be less than the heap min size. No need to adjust it |
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1617 // with respect to the heap max size as it's an upper bound (i.e., |
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1618 // we'll try to make the capacity smaller than it, not greater). |
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1619 maximum_desired_capacity = MAX2(maximum_desired_capacity, min_heap_size); |
342 | 1620 |
1717
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1621 if (capacity_after_gc < minimum_desired_capacity) { |
342 | 1622 // Don't expand unless it's significant |
1623 size_t expand_bytes = minimum_desired_capacity - capacity_after_gc; | |
3914
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1624 ergo_verbose4(ErgoHeapSizing, |
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1625 "attempt heap expansion", |
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1626 ergo_format_reason("capacity lower than " |
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1627 "min desired capacity after Full GC") |
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1628 ergo_format_byte("capacity") |
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1629 ergo_format_byte("occupancy") |
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1630 ergo_format_byte_perc("min desired capacity"), |
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1631 capacity_after_gc, used_after_gc, |
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1632 minimum_desired_capacity, (double) MinHeapFreeRatio); |
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1633 expand(expand_bytes); |
342 | 1634 |
1635 // No expansion, now see if we want to shrink | |
1717
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1636 } else if (capacity_after_gc > maximum_desired_capacity) { |
342 | 1637 // Capacity too large, compute shrinking size |
1638 size_t shrink_bytes = capacity_after_gc - maximum_desired_capacity; | |
3914
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1639 ergo_verbose4(ErgoHeapSizing, |
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1640 "attempt heap shrinking", |
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1641 ergo_format_reason("capacity higher than " |
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1642 "max desired capacity after Full GC") |
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1643 ergo_format_byte("capacity") |
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1644 ergo_format_byte("occupancy") |
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1645 ergo_format_byte_perc("max desired capacity"), |
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1646 capacity_after_gc, used_after_gc, |
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1647 maximum_desired_capacity, (double) MaxHeapFreeRatio); |
342 | 1648 shrink(shrink_bytes); |
1649 } | |
1650 } | |
1651 | |
1652 | |
1653 HeapWord* | |
1973 | 1654 G1CollectedHeap::satisfy_failed_allocation(size_t word_size, |
1655 bool* succeeded) { | |
2152 | 1656 assert_at_safepoint(true /* should_be_vm_thread */); |
1973 | 1657 |
1658 *succeeded = true; | |
1659 // Let's attempt the allocation first. | |
2433
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1660 HeapWord* result = |
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1661 attempt_allocation_at_safepoint(word_size, |
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1662 false /* expect_null_mutator_alloc_region */); |
1973 | 1663 if (result != NULL) { |
1664 assert(*succeeded, "sanity"); | |
1665 return result; | |
1666 } | |
342 | 1667 |
1668 // In a G1 heap, we're supposed to keep allocation from failing by | |
1669 // incremental pauses. Therefore, at least for now, we'll favor | |
1670 // expansion over collection. (This might change in the future if we can | |
1671 // do something smarter than full collection to satisfy a failed alloc.) | |
1672 result = expand_and_allocate(word_size); | |
1673 if (result != NULL) { | |
1973 | 1674 assert(*succeeded, "sanity"); |
342 | 1675 return result; |
1676 } | |
1677 | |
1973 | 1678 // Expansion didn't work, we'll try to do a Full GC. |
1679 bool gc_succeeded = do_collection(false, /* explicit_gc */ | |
1680 false, /* clear_all_soft_refs */ | |
1681 word_size); | |
1682 if (!gc_succeeded) { | |
1683 *succeeded = false; | |
1684 return NULL; | |
1685 } | |
1686 | |
1687 // Retry the allocation | |
1688 result = attempt_allocation_at_safepoint(word_size, | |
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1689 true /* expect_null_mutator_alloc_region */); |
342 | 1690 if (result != NULL) { |
1973 | 1691 assert(*succeeded, "sanity"); |
342 | 1692 return result; |
1693 } | |
1694 | |
1973 | 1695 // Then, try a Full GC that will collect all soft references. |
1696 gc_succeeded = do_collection(false, /* explicit_gc */ | |
1697 true, /* clear_all_soft_refs */ | |
1698 word_size); | |
1699 if (!gc_succeeded) { | |
1700 *succeeded = false; | |
1701 return NULL; | |
1702 } | |
1703 | |
1704 // Retry the allocation once more | |
1705 result = attempt_allocation_at_safepoint(word_size, | |
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1706 true /* expect_null_mutator_alloc_region */); |
342 | 1707 if (result != NULL) { |
1973 | 1708 assert(*succeeded, "sanity"); |
342 | 1709 return result; |
1710 } | |
1711 | |
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1712 assert(!collector_policy()->should_clear_all_soft_refs(), |
1973 | 1713 "Flag should have been handled and cleared prior to this point"); |
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1714 |
342 | 1715 // What else? We might try synchronous finalization later. If the total |
1716 // space available is large enough for the allocation, then a more | |
1717 // complete compaction phase than we've tried so far might be | |
1718 // appropriate. | |
1973 | 1719 assert(*succeeded, "sanity"); |
342 | 1720 return NULL; |
1721 } | |
1722 | |
1723 // Attempting to expand the heap sufficiently | |
1724 // to support an allocation of the given "word_size". If | |
1725 // successful, perform the allocation and return the address of the | |
1726 // allocated block, or else "NULL". | |
1727 | |
1728 HeapWord* G1CollectedHeap::expand_and_allocate(size_t word_size) { | |
2152 | 1729 assert_at_safepoint(true /* should_be_vm_thread */); |
1730 | |
1731 verify_region_sets_optional(); | |
1973 | 1732 |
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1733 size_t expand_bytes = MAX2(word_size * HeapWordSize, MinHeapDeltaBytes); |
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1734 ergo_verbose1(ErgoHeapSizing, |
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1735 "attempt heap expansion", |
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1736 ergo_format_reason("allocation request failed") |
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1737 ergo_format_byte("allocation request"), |
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1738 word_size * HeapWordSize); |
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1739 if (expand(expand_bytes)) { |
3766 | 1740 _hrs.verify_optional(); |
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1741 verify_region_sets_optional(); |
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1742 return attempt_allocation_at_safepoint(word_size, |
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1743 false /* expect_null_mutator_alloc_region */); |
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1744 } |
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1745 return NULL; |
342 | 1746 } |
1747 | |
3766 | 1748 void G1CollectedHeap::update_committed_space(HeapWord* old_end, |
1749 HeapWord* new_end) { | |
1750 assert(old_end != new_end, "don't call this otherwise"); | |
1751 assert((HeapWord*) _g1_storage.high() == new_end, "invariant"); | |
1752 | |
1753 // Update the committed mem region. | |
1754 _g1_committed.set_end(new_end); | |
1755 // Tell the card table about the update. | |
1756 Universe::heap()->barrier_set()->resize_covered_region(_g1_committed); | |
1757 // Tell the BOT about the update. | |
1758 _bot_shared->resize(_g1_committed.word_size()); | |
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1759 // Tell the hot card cache about the update |
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1760 _cg1r->hot_card_cache()->resize_card_counts(capacity()); |
3766 | 1761 } |
1762 | |
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1763 bool G1CollectedHeap::expand(size_t expand_bytes) { |
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1764 size_t aligned_expand_bytes = ReservedSpace::page_align_size_up(expand_bytes); |
342 | 1765 aligned_expand_bytes = align_size_up(aligned_expand_bytes, |
1766 HeapRegion::GrainBytes); | |
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1767 ergo_verbose2(ErgoHeapSizing, |
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1768 "expand the heap", |
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1769 ergo_format_byte("requested expansion amount") |
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1770 ergo_format_byte("attempted expansion amount"), |
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1771 expand_bytes, aligned_expand_bytes); |
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1772 |
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1773 if (_g1_storage.uncommitted_size() == 0) { |
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1774 ergo_verbose0(ErgoHeapSizing, |
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1775 "did not expand the heap", |
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1776 ergo_format_reason("heap already fully expanded")); |
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1777 return false; |
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1778 } |
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1779 |
3766 | 1780 // First commit the memory. |
1781 HeapWord* old_end = (HeapWord*) _g1_storage.high(); | |
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1782 bool successful = _g1_storage.expand_by(aligned_expand_bytes); |
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1783 if (successful) { |
3766 | 1784 // Then propagate this update to the necessary data structures. |
1785 HeapWord* new_end = (HeapWord*) _g1_storage.high(); | |
1786 update_committed_space(old_end, new_end); | |
1787 | |
1788 FreeRegionList expansion_list("Local Expansion List"); | |
1789 MemRegion mr = _hrs.expand_by(old_end, new_end, &expansion_list); | |
1790 assert(mr.start() == old_end, "post-condition"); | |
1791 // mr might be a smaller region than what was requested if | |
1792 // expand_by() was unable to allocate the HeapRegion instances | |
1793 assert(mr.end() <= new_end, "post-condition"); | |
1794 | |
1795 size_t actual_expand_bytes = mr.byte_size(); | |
1796 assert(actual_expand_bytes <= aligned_expand_bytes, "post-condition"); | |
1797 assert(actual_expand_bytes == expansion_list.total_capacity_bytes(), | |
1798 "post-condition"); | |
1799 if (actual_expand_bytes < aligned_expand_bytes) { | |
1800 // We could not expand _hrs to the desired size. In this case we | |
1801 // need to shrink the committed space accordingly. | |
1802 assert(mr.end() < new_end, "invariant"); | |
1803 | |
1804 size_t diff_bytes = aligned_expand_bytes - actual_expand_bytes; | |
1805 // First uncommit the memory. | |
1806 _g1_storage.shrink_by(diff_bytes); | |
1807 // Then propagate this update to the necessary data structures. | |
1808 update_committed_space(new_end, mr.end()); | |
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1809 } |
3766 | 1810 _free_list.add_as_tail(&expansion_list); |
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1811 |
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1812 if (_hr_printer.is_active()) { |
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1813 HeapWord* curr = mr.start(); |
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1814 while (curr < mr.end()) { |
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1815 HeapWord* curr_end = curr + HeapRegion::GrainWords; |
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1816 _hr_printer.commit(curr, curr_end); |
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1817 curr = curr_end; |
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1818 } |
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1819 assert(curr == mr.end(), "post-condition"); |
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1820 } |
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1821 g1_policy()->record_new_heap_size(n_regions()); |
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1822 } else { |
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1823 ergo_verbose0(ErgoHeapSizing, |
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1824 "did not expand the heap", |
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1825 ergo_format_reason("heap expansion operation failed")); |
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1826 // The expansion of the virtual storage space was unsuccessful. |
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1827 // Let's see if it was because we ran out of swap. |
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1828 if (G1ExitOnExpansionFailure && |
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1829 _g1_storage.uncommitted_size() >= aligned_expand_bytes) { |
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1830 // We had head room... |
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1831 vm_exit_out_of_memory(aligned_expand_bytes, OOM_MMAP_ERROR, "G1 heap expansion"); |
342 | 1832 } |
1833 } | |
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1834 return successful; |
342 | 1835 } |
1836 | |
3766 | 1837 void G1CollectedHeap::shrink_helper(size_t shrink_bytes) { |
342 | 1838 size_t aligned_shrink_bytes = |
1839 ReservedSpace::page_align_size_down(shrink_bytes); | |
1840 aligned_shrink_bytes = align_size_down(aligned_shrink_bytes, | |
1841 HeapRegion::GrainBytes); | |
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1842 uint num_regions_to_remove = (uint)(shrink_bytes / HeapRegion::GrainBytes); |
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1843 |
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1844 uint num_regions_removed = _hrs.shrink_by(num_regions_to_remove); |
3766 | 1845 HeapWord* old_end = (HeapWord*) _g1_storage.high(); |
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1846 size_t shrunk_bytes = num_regions_removed * HeapRegion::GrainBytes; |
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1847 |
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1848 ergo_verbose3(ErgoHeapSizing, |
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1849 "shrink the heap", |
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1850 ergo_format_byte("requested shrinking amount") |
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1851 ergo_format_byte("aligned shrinking amount") |
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1852 ergo_format_byte("attempted shrinking amount"), |
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1853 shrink_bytes, aligned_shrink_bytes, shrunk_bytes); |
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1854 if (num_regions_removed > 0) { |
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1855 _g1_storage.shrink_by(shrunk_bytes); |
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1856 HeapWord* new_end = (HeapWord*) _g1_storage.high(); |
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1857 |
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1858 if (_hr_printer.is_active()) { |
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1859 HeapWord* curr = old_end; |
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1860 while (curr > new_end) { |
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1861 HeapWord* curr_end = curr; |
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1862 curr -= HeapRegion::GrainWords; |
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1863 _hr_printer.uncommit(curr, curr_end); |
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1864 } |
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1865 } |
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1866 |
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1867 _expansion_regions += num_regions_removed; |
3766 | 1868 update_committed_space(old_end, new_end); |
1869 HeapRegionRemSet::shrink_heap(n_regions()); | |
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1870 g1_policy()->record_new_heap_size(n_regions()); |
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1871 } else { |
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1872 ergo_verbose0(ErgoHeapSizing, |
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1873 "did not shrink the heap", |
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1874 ergo_format_reason("heap shrinking operation failed")); |
342 | 1875 } |
1876 } | |
1877 | |
1878 void G1CollectedHeap::shrink(size_t shrink_bytes) { | |
2152 | 1879 verify_region_sets_optional(); |
1880 | |
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1881 // We should only reach here at the end of a Full GC which means we |
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1882 // should not not be holding to any GC alloc regions. The method |
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1883 // below will make sure of that and do any remaining clean up. |
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1884 abandon_gc_alloc_regions(); |
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1885 |
2152 | 1886 // Instead of tearing down / rebuilding the free lists here, we |
1887 // could instead use the remove_all_pending() method on free_list to | |
1888 // remove only the ones that we need to remove. | |
4072 | 1889 tear_down_region_sets(true /* free_list_only */); |
342 | 1890 shrink_helper(shrink_bytes); |
4072 | 1891 rebuild_region_sets(true /* free_list_only */); |
2152 | 1892 |
3766 | 1893 _hrs.verify_optional(); |
2152 | 1894 verify_region_sets_optional(); |
342 | 1895 } |
1896 | |
1897 // Public methods. | |
1898 | |
1899 #ifdef _MSC_VER // the use of 'this' below gets a warning, make it go away | |
1900 #pragma warning( disable:4355 ) // 'this' : used in base member initializer list | |
1901 #endif // _MSC_VER | |
1902 | |
1903 | |
1904 G1CollectedHeap::G1CollectedHeap(G1CollectorPolicy* policy_) : | |
1905 SharedHeap(policy_), | |
1906 _g1_policy(policy_), | |
1111 | 1907 _dirty_card_queue_set(false), |
1705 | 1908 _into_cset_dirty_card_queue_set(false), |
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1909 _is_alive_closure_cm(this), |
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1910 _is_alive_closure_stw(this), |
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1911 _ref_processor_cm(NULL), |
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1912 _ref_processor_stw(NULL), |
342 | 1913 _process_strong_tasks(new SubTasksDone(G1H_PS_NumElements)), |
1914 _bot_shared(NULL), | |
10405 | 1915 _evac_failure_scan_stack(NULL), |
342 | 1916 _mark_in_progress(false), |
2152 | 1917 _cg1r(NULL), _summary_bytes_used(0), |
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1918 _g1mm(NULL), |
342 | 1919 _refine_cte_cl(NULL), |
1920 _full_collection(false), | |
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1921 _free_list("Master Free List", new MasterFreeRegionListMtSafeChecker()), |
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1922 _secondary_free_list("Secondary Free List", new SecondaryFreeRegionListMtSafeChecker()), |
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1923 _old_set("Old Set", false /* humongous */, new OldRegionSetMtSafeChecker()), |
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1924 _humongous_set("Master Humongous Set", true /* humongous */, new HumongousRegionSetMtSafeChecker()), |
2152 | 1925 _free_regions_coming(false), |
342 | 1926 _young_list(new YoungList(this)), |
1927 _gc_time_stamp(0), | |
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1928 _retained_old_gc_alloc_region(NULL), |
6595 | 1929 _survivor_plab_stats(YoungPLABSize, PLABWeight), |
1930 _old_plab_stats(OldPLABSize, PLABWeight), | |
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1931 _expand_heap_after_alloc_failure(true), |
526 | 1932 _surviving_young_words(NULL), |
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1933 _old_marking_cycles_started(0), |
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1934 _old_marking_cycles_completed(0), |
10405 | 1935 _concurrent_cycle_started(false), |
526 | 1936 _in_cset_fast_test(NULL), |
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1937 _in_cset_fast_test_base(NULL), |
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1938 _dirty_cards_region_list(NULL), |
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1939 _worker_cset_start_region(NULL), |
10405 | 1940 _worker_cset_start_region_time_stamp(NULL), |
1941 _gc_timer_stw(new (ResourceObj::C_HEAP, mtGC) STWGCTimer()), | |
1942 _gc_timer_cm(new (ResourceObj::C_HEAP, mtGC) ConcurrentGCTimer()), | |
1943 _gc_tracer_stw(new (ResourceObj::C_HEAP, mtGC) G1NewTracer()), | |
1944 _gc_tracer_cm(new (ResourceObj::C_HEAP, mtGC) G1OldTracer()) { | |
1945 | |
1946 _g1h = this; | |
342 | 1947 if (_process_strong_tasks == NULL || !_process_strong_tasks->valid()) { |
1948 vm_exit_during_initialization("Failed necessary allocation."); | |
1949 } | |
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1950 |
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1951 _humongous_object_threshold_in_words = HeapRegion::GrainWords / 2; |
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1952 |
342 | 1953 int n_queues = MAX2((int)ParallelGCThreads, 1); |
1954 _task_queues = new RefToScanQueueSet(n_queues); | |
1955 | |
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1956 uint n_rem_sets = HeapRegionRemSet::num_par_rem_sets(); |
342 | 1957 assert(n_rem_sets > 0, "Invariant."); |
1958 | |
6197 | 1959 _worker_cset_start_region = NEW_C_HEAP_ARRAY(HeapRegion*, n_queues, mtGC); |
1960 _worker_cset_start_region_time_stamp = NEW_C_HEAP_ARRAY(unsigned int, n_queues, mtGC); | |
10405 | 1961 _evacuation_failed_info_array = NEW_C_HEAP_ARRAY(EvacuationFailedInfo, n_queues, mtGC); |
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1962 |
342 | 1963 for (int i = 0; i < n_queues; i++) { |
1964 RefToScanQueue* q = new RefToScanQueue(); | |
1965 q->initialize(); | |
1966 _task_queues->register_queue(i, q); | |
10405 | 1967 ::new (&_evacuation_failed_info_array[i]) EvacuationFailedInfo(); |
1968 } | |
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1969 clear_cset_start_regions(); |
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1970 |
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1971 // Initialize the G1EvacuationFailureALot counters and flags. |
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1972 NOT_PRODUCT(reset_evacuation_should_fail();) |
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1973 |
342 | 1974 guarantee(_task_queues != NULL, "task_queues allocation failure."); |
1975 } | |
1976 | |
1977 jint G1CollectedHeap::initialize() { | |
1166 | 1978 CollectedHeap::pre_initialize(); |
342 | 1979 os::enable_vtime(); |
1980 | |
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1981 G1Log::init(); |
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1982 |
342 | 1983 // Necessary to satisfy locking discipline assertions. |
1984 | |
1985 MutexLocker x(Heap_lock); | |
1986 | |
3778
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1987 // We have to initialize the printer before committing the heap, as |
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1988 // it will be used then. |
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1989 _hr_printer.set_active(G1PrintHeapRegions); |
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1990 |
342 | 1991 // While there are no constraints in the GC code that HeapWordSize |
1992 // be any particular value, there are multiple other areas in the | |
1993 // system which believe this to be true (e.g. oop->object_size in some | |
1994 // cases incorrectly returns the size in wordSize units rather than | |
1995 // HeapWordSize). | |
1996 guarantee(HeapWordSize == wordSize, "HeapWordSize must equal wordSize"); | |
1997 | |
1998 size_t init_byte_size = collector_policy()->initial_heap_byte_size(); | |
1999 size_t max_byte_size = collector_policy()->max_heap_byte_size(); | |
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2000 size_t heap_alignment = collector_policy()->heap_alignment(); |
342 | 2001 |
2002 // Ensure that the sizes are properly aligned. | |
2003 Universe::check_alignment(init_byte_size, HeapRegion::GrainBytes, "g1 heap"); | |
2004 Universe::check_alignment(max_byte_size, HeapRegion::GrainBytes, "g1 heap"); | |
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2005 Universe::check_alignment(max_byte_size, heap_alignment, "g1 heap"); |
342 | 2006 |
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2007 _cg1r = new ConcurrentG1Refine(this); |
342 | 2008 |
2009 // Reserve the maximum. | |
642
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2010 |
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2011 // When compressed oops are enabled, the preferred heap base |
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2012 // is calculated by subtracting the requested size from the |
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2013 // 32Gb boundary and using the result as the base address for |
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2014 // heap reservation. If the requested size is not aligned to |
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2015 // HeapRegion::GrainBytes (i.e. the alignment that is passed |
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2016 // into the ReservedHeapSpace constructor) then the actual |
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2017 // base of the reserved heap may end up differing from the |
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2018 // address that was requested (i.e. the preferred heap base). |
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2019 // If this happens then we could end up using a non-optimal |
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2020 // compressed oops mode. |
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2021 |
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2022 ReservedSpace heap_rs = Universe::reserve_heap(max_byte_size, |
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2023 heap_alignment); |
342 | 2024 |
2025 // It is important to do this in a way such that concurrent readers can't | |
10405 | 2026 // temporarily think something is in the heap. (I've actually seen this |
342 | 2027 // happen in asserts: DLD.) |
2028 _reserved.set_word_size(0); | |
2029 _reserved.set_start((HeapWord*)heap_rs.base()); | |
2030 _reserved.set_end((HeapWord*)(heap_rs.base() + heap_rs.size())); | |
2031 | |
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2032 _expansion_regions = (uint) (max_byte_size / HeapRegion::GrainBytes); |
342 | 2033 |
2034 // Create the gen rem set (and barrier set) for the entire reserved region. | |
2035 _rem_set = collector_policy()->create_rem_set(_reserved, 2); | |
2036 set_barrier_set(rem_set()->bs()); | |
12343 | 2037 if (!barrier_set()->is_a(BarrierSet::G1SATBCTLogging)) { |
2038 vm_exit_during_initialization("G1 requires a G1SATBLoggingCardTableModRefBS"); | |
342 | 2039 return JNI_ENOMEM; |
2040 } | |
2041 | |
2042 // Also create a G1 rem set. | |
12343 | 2043 _g1_rem_set = new G1RemSet(this, g1_barrier_set()); |
342 | 2044 |
2045 // Carve out the G1 part of the heap. | |
2046 | |
2047 ReservedSpace g1_rs = heap_rs.first_part(max_byte_size); | |
2048 _g1_reserved = MemRegion((HeapWord*)g1_rs.base(), | |
2049 g1_rs.size()/HeapWordSize); | |
2050 | |
2051 _g1_storage.initialize(g1_rs, 0); | |
2052 _g1_committed = MemRegion((HeapWord*)_g1_storage.low(), (size_t) 0); | |
3766 | 2053 _hrs.initialize((HeapWord*) _g1_reserved.start(), |
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2054 (HeapWord*) _g1_reserved.end()); |
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2055 assert(_hrs.max_length() == _expansion_regions, |
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2056 err_msg("max length: %u expansion regions: %u", |
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2057 _hrs.max_length(), _expansion_regions)); |
342 | 2058 |
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2059 // Do later initialization work for concurrent refinement. |
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2060 _cg1r->init(); |
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2061 |
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2062 // 6843694 - ensure that the maximum region index can fit |
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2063 // in the remembered set structures. |
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2064 const uint max_region_idx = (1U << (sizeof(RegionIdx_t)*BitsPerByte-1)) - 1; |
807
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2065 guarantee((max_regions() - 1) <= max_region_idx, "too many regions"); |
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2066 |
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2067 size_t max_cards_per_region = ((size_t)1 << (sizeof(CardIdx_t)*BitsPerByte-1)) - 1; |
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2068 guarantee(HeapRegion::CardsPerRegion > 0, "make sure it's initialized"); |
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2069 guarantee(HeapRegion::CardsPerRegion < max_cards_per_region, |
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2070 "too many cards per region"); |
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2071 |
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2072 FreeRegionList::set_unrealistically_long_length(max_regions() + 1); |
2152 | 2073 |
342 | 2074 _bot_shared = new G1BlockOffsetSharedArray(_reserved, |
2075 heap_word_size(init_byte_size)); | |
2076 | |
2077 _g1h = this; | |
2078 | |
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2079 _in_cset_fast_test_length = max_regions(); |
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2080 _in_cset_fast_test_base = |
6197 | 2081 NEW_C_HEAP_ARRAY(bool, (size_t) _in_cset_fast_test_length, mtGC); |
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2082 |
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2083 // We're biasing _in_cset_fast_test to avoid subtracting the |
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2084 // beginning of the heap every time we want to index; basically |
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2085 // it's the same with what we do with the card table. |
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2086 _in_cset_fast_test = _in_cset_fast_test_base - |
6010
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7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
2087 ((uintx) _g1_reserved.start() >> HeapRegion::LogOfHRGrainBytes); |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2088 |
10246
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
10242
diff
changeset
|
2089 // Clear the _cset_fast_test bitmap in anticipation of adding |
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
10242
diff
changeset
|
2090 // regions to the incremental collection set for the first |
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
10242
diff
changeset
|
2091 // evacuation pause. |
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
10242
diff
changeset
|
2092 clear_cset_fast_test(); |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2093 |
342 | 2094 // Create the ConcurrentMark data structure and thread. |
2095 // (Must do this late, so that "max_regions" is defined.) | |
7397
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
7207
diff
changeset
|
2096 _cm = new ConcurrentMark(this, heap_rs); |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
7207
diff
changeset
|
2097 if (_cm == NULL || !_cm->completed_initialization()) { |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
7207
diff
changeset
|
2098 vm_shutdown_during_initialization("Could not create/initialize ConcurrentMark"); |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
7207
diff
changeset
|
2099 return JNI_ENOMEM; |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
7207
diff
changeset
|
2100 } |
342 | 2101 _cmThread = _cm->cmThread(); |
2102 | |
2103 // Initialize the from_card cache structure of HeapRegionRemSet. | |
2104 HeapRegionRemSet::init_heap(max_regions()); | |
2105 | |
677 | 2106 // Now expand into the initial heap size. |
2188
c33825b68624
6923430: G1: assert(res != 0,"This should have worked.")
johnc
parents:
2173
diff
changeset
|
2107 if (!expand(init_byte_size)) { |
7397
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
7207
diff
changeset
|
2108 vm_shutdown_during_initialization("Failed to allocate initial heap."); |
2188
c33825b68624
6923430: G1: assert(res != 0,"This should have worked.")
johnc
parents:
2173
diff
changeset
|
2109 return JNI_ENOMEM; |
c33825b68624
6923430: G1: assert(res != 0,"This should have worked.")
johnc
parents:
2173
diff
changeset
|
2110 } |
342 | 2111 |
2112 // Perform any initialization actions delegated to the policy. | |
2113 g1_policy()->init(); | |
2114 | |
2115 _refine_cte_cl = | |
2116 new RefineCardTableEntryClosure(ConcurrentG1RefineThread::sts(), | |
2117 g1_rem_set(), | |
2118 concurrent_g1_refine()); | |
2119 JavaThread::dirty_card_queue_set().set_closure(_refine_cte_cl); | |
2120 | |
2121 JavaThread::satb_mark_queue_set().initialize(SATB_Q_CBL_mon, | |
2122 SATB_Q_FL_lock, | |
1111 | 2123 G1SATBProcessCompletedThreshold, |
342 | 2124 Shared_SATB_Q_lock); |
794 | 2125 |
2126 JavaThread::dirty_card_queue_set().initialize(DirtyCardQ_CBL_mon, | |
2127 DirtyCardQ_FL_lock, | |
1111 | 2128 concurrent_g1_refine()->yellow_zone(), |
2129 concurrent_g1_refine()->red_zone(), | |
794 | 2130 Shared_DirtyCardQ_lock); |
2131 | |
616
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
2132 if (G1DeferredRSUpdate) { |
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
2133 dirty_card_queue_set().initialize(DirtyCardQ_CBL_mon, |
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
2134 DirtyCardQ_FL_lock, |
1111 | 2135 -1, // never trigger processing |
2136 -1, // no limit on length | |
616
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
2137 Shared_DirtyCardQ_lock, |
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
2138 &JavaThread::dirty_card_queue_set()); |
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
2139 } |
1705 | 2140 |
2141 // Initialize the card queue set used to hold cards containing | |
2142 // references into the collection set. | |
2143 _into_cset_dirty_card_queue_set.initialize(DirtyCardQ_CBL_mon, | |
2144 DirtyCardQ_FL_lock, | |
2145 -1, // never trigger processing | |
2146 -1, // no limit on length | |
2147 Shared_DirtyCardQ_lock, | |
2148 &JavaThread::dirty_card_queue_set()); | |
2149 | |
342 | 2150 // In case we're keeping closure specialization stats, initialize those |
2151 // counts and that mechanism. | |
2152 SpecializationStats::clear(); | |
2153 | |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2154 // Here we allocate the dummy full region that is required by the |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2155 // G1AllocRegion class. If we don't pass an address in the reserved |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2156 // space here, lots of asserts fire. |
3766 | 2157 |
2158 HeapRegion* dummy_region = new_heap_region(0 /* index of bottom region */, | |
2159 _g1_reserved.start()); | |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2160 // We'll re-use the same region whether the alloc region will |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2161 // require BOT updates or not and, if it doesn't, then a non-young |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2162 // region will complain that it cannot support allocations without |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2163 // BOT updates. So we'll tag the dummy region as young to avoid that. |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2164 dummy_region->set_young(); |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2165 // Make sure it's full. |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2166 dummy_region->set_top(dummy_region->end()); |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2167 G1AllocRegion::setup(this, dummy_region); |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2168 |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2169 init_mutator_alloc_region(); |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2170 |
3289
b52782ae3880
6946417: G1: Java VisualVM does not support G1 properly.
jmasa
parents:
3285
diff
changeset
|
2171 // Do create of the monitoring and management support so that |
b52782ae3880
6946417: G1: Java VisualVM does not support G1 properly.
jmasa
parents:
3285
diff
changeset
|
2172 // values in the heap have been properly initialized. |
3980
8229bd737950
7075646: G1: fix inconsistencies in the monitoring data
tonyp
parents:
3979
diff
changeset
|
2173 _g1mm = new G1MonitoringSupport(this); |
3289
b52782ae3880
6946417: G1: Java VisualVM does not support G1 properly.
jmasa
parents:
3285
diff
changeset
|
2174 |
17764 | 2175 G1StringDedup::initialize(); |
2176 | |
342 | 2177 return JNI_OK; |
2178 } | |
2179 | |
17947
1772223a25a2
8037112: gc/g1/TestHumongousAllocInitialMark.java caused SIGSEGV
pliden
parents:
17937
diff
changeset
|
2180 void G1CollectedHeap::stop() { |
17992 | 2181 // Stop all concurrent threads. We do this to make sure these threads |
2182 // do not continue to execute and access resources (e.g. gclog_or_tty) | |
17947
1772223a25a2
8037112: gc/g1/TestHumongousAllocInitialMark.java caused SIGSEGV
pliden
parents:
17937
diff
changeset
|
2183 // that are destroyed during shutdown. |
17992 | 2184 _cg1r->stop(); |
2185 _cmThread->stop(); | |
2186 if (G1StringDedup::is_enabled()) { | |
2187 G1StringDedup::stop(); | |
2188 } | |
17947
1772223a25a2
8037112: gc/g1/TestHumongousAllocInitialMark.java caused SIGSEGV
pliden
parents:
17937
diff
changeset
|
2189 } |
1772223a25a2
8037112: gc/g1/TestHumongousAllocInitialMark.java caused SIGSEGV
pliden
parents:
17937
diff
changeset
|
2190 |
12233
40136aa2cdb1
8010722: assert: failed: heap size is too big for compressed oops
tschatzl
parents:
12179
diff
changeset
|
2191 size_t G1CollectedHeap::conservative_max_heap_alignment() { |
40136aa2cdb1
8010722: assert: failed: heap size is too big for compressed oops
tschatzl
parents:
12179
diff
changeset
|
2192 return HeapRegion::max_region_size(); |
40136aa2cdb1
8010722: assert: failed: heap size is too big for compressed oops
tschatzl
parents:
12179
diff
changeset
|
2193 } |
40136aa2cdb1
8010722: assert: failed: heap size is too big for compressed oops
tschatzl
parents:
12179
diff
changeset
|
2194 |
342 | 2195 void G1CollectedHeap::ref_processing_init() { |
1974
fd1d227ef1b9
6983204: G1: Nightly test nsk/regression/b4958615 failing with +ExplicitGCInvokesConcurrent
johnc
parents:
1973
diff
changeset
|
2196 // Reference processing in G1 currently works as follows: |
fd1d227ef1b9
6983204: G1: Nightly test nsk/regression/b4958615 failing with +ExplicitGCInvokesConcurrent
johnc
parents:
1973
diff
changeset
|
2197 // |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2198 // * There are two reference processor instances. One is |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2199 // used to record and process discovered references |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2200 // during concurrent marking; the other is used to |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2201 // record and process references during STW pauses |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2202 // (both full and incremental). |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2203 // * Both ref processors need to 'span' the entire heap as |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2204 // the regions in the collection set may be dotted around. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2205 // |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2206 // * For the concurrent marking ref processor: |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2207 // * Reference discovery is enabled at initial marking. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2208 // * Reference discovery is disabled and the discovered |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2209 // references processed etc during remarking. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2210 // * Reference discovery is MT (see below). |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2211 // * Reference discovery requires a barrier (see below). |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2212 // * Reference processing may or may not be MT |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2213 // (depending on the value of ParallelRefProcEnabled |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2214 // and ParallelGCThreads). |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2215 // * A full GC disables reference discovery by the CM |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2216 // ref processor and abandons any entries on it's |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2217 // discovered lists. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2218 // |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2219 // * For the STW processor: |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2220 // * Non MT discovery is enabled at the start of a full GC. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2221 // * Processing and enqueueing during a full GC is non-MT. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2222 // * During a full GC, references are processed after marking. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2223 // |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2224 // * Discovery (may or may not be MT) is enabled at the start |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2225 // of an incremental evacuation pause. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2226 // * References are processed near the end of a STW evacuation pause. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2227 // * For both types of GC: |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2228 // * Discovery is atomic - i.e. not concurrent. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2229 // * Reference discovery will not need a barrier. |
1974
fd1d227ef1b9
6983204: G1: Nightly test nsk/regression/b4958615 failing with +ExplicitGCInvokesConcurrent
johnc
parents:
1973
diff
changeset
|
2230 |
342 | 2231 SharedHeap::ref_processing_init(); |
2232 MemRegion mr = reserved_region(); | |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2233 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2234 // Concurrent Mark ref processor |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2235 _ref_processor_cm = |
2369
92da084fefc9
6668573: CMS: reference processing crash if ParallelCMSThreads > ParallelGCThreads
ysr
parents:
2361
diff
changeset
|
2236 new ReferenceProcessor(mr, // span |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2237 ParallelRefProcEnabled && (ParallelGCThreads > 1), |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2238 // mt processing |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2239 (int) ParallelGCThreads, |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2240 // degree of mt processing |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
2241 (ParallelGCThreads > 1) || (ConcGCThreads > 1), |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2242 // mt discovery |
4dfb2df418f2
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parents:
3973
diff
changeset
|
2243 (int) MAX2(ParallelGCThreads, ConcGCThreads), |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2244 // degree of mt discovery |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2245 false, |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2246 // Reference discovery is not atomic |
17976
8e20ef014b08
8043239: G1: Missing post barrier in processing of j.l.ref.Reference objects
brutisso
parents:
17948
diff
changeset
|
2247 &_is_alive_closure_cm); |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2248 // is alive closure |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2249 // (for efficiency/performance) |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2250 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2251 // STW ref processor |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
2252 _ref_processor_stw = |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2253 new ReferenceProcessor(mr, // span |
4dfb2df418f2
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parents:
3973
diff
changeset
|
2254 ParallelRefProcEnabled && (ParallelGCThreads > 1), |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2255 // mt processing |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
2256 MAX2((int)ParallelGCThreads, 1), |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2257 // degree of mt processing |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
2258 (ParallelGCThreads > 1), |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2259 // mt discovery |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
2260 MAX2((int)ParallelGCThreads, 1), |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2261 // degree of mt discovery |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2262 true, |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2263 // Reference discovery is atomic |
17976
8e20ef014b08
8043239: G1: Missing post barrier in processing of j.l.ref.Reference objects
brutisso
parents:
17948
diff
changeset
|
2264 &_is_alive_closure_stw); |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2265 // is alive closure |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2266 // (for efficiency/performance) |
342 | 2267 } |
2268 | |
2269 size_t G1CollectedHeap::capacity() const { | |
2270 return _g1_committed.byte_size(); | |
2271 } | |
2272 | |
6254
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2273 void G1CollectedHeap::reset_gc_time_stamps(HeapRegion* hr) { |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
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|
2274 assert(!hr->continuesHumongous(), "pre-condition"); |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
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parents:
6220
diff
changeset
|
2275 hr->reset_gc_time_stamp(); |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2276 if (hr->startsHumongous()) { |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2277 uint first_index = hr->hrs_index() + 1; |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2278 uint last_index = hr->last_hc_index(); |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2279 for (uint i = first_index; i < last_index; i += 1) { |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2280 HeapRegion* chr = region_at(i); |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2281 assert(chr->continuesHumongous(), "sanity"); |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2282 chr->reset_gc_time_stamp(); |
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7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
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|
2283 } |
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7114678: G1: various small fixes, code cleanup, and refactoring
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parents:
6220
diff
changeset
|
2284 } |
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7114678: G1: various small fixes, code cleanup, and refactoring
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parents:
6220
diff
changeset
|
2285 } |
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7114678: G1: various small fixes, code cleanup, and refactoring
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parents:
6220
diff
changeset
|
2286 |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2287 #ifndef PRODUCT |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2288 class CheckGCTimeStampsHRClosure : public HeapRegionClosure { |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2289 private: |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2290 unsigned _gc_time_stamp; |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2291 bool _failures; |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2292 |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2293 public: |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2294 CheckGCTimeStampsHRClosure(unsigned gc_time_stamp) : |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2295 _gc_time_stamp(gc_time_stamp), _failures(false) { } |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2296 |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2297 virtual bool doHeapRegion(HeapRegion* hr) { |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2298 unsigned region_gc_time_stamp = hr->get_gc_time_stamp(); |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
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|
2299 if (_gc_time_stamp != region_gc_time_stamp) { |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2300 gclog_or_tty->print_cr("Region "HR_FORMAT" has GC time stamp = %d, " |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2301 "expected %d", HR_FORMAT_PARAMS(hr), |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2302 region_gc_time_stamp, _gc_time_stamp); |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
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|
2303 _failures = true; |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2304 } |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2305 return false; |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2306 } |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2307 |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2308 bool failures() { return _failures; } |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2309 }; |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2310 |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2311 void G1CollectedHeap::check_gc_time_stamps() { |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2312 CheckGCTimeStampsHRClosure cl(_gc_time_stamp); |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2313 heap_region_iterate(&cl); |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2314 guarantee(!cl.failures(), "all GC time stamps should have been reset"); |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2315 } |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2316 #endif // PRODUCT |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2317 |
1705 | 2318 void G1CollectedHeap::iterate_dirty_card_closure(CardTableEntryClosure* cl, |
2319 DirtyCardQueue* into_cset_dcq, | |
2320 bool concurrent, | |
17844
8847586c9037
8016302: Change type of the number of GC workers to unsigned int (2)
vkempik
parents:
17833
diff
changeset
|
2321 uint worker_i) { |
889 | 2322 // Clean cards in the hot card cache |
10246
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
10242
diff
changeset
|
2323 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
|
2324 hot_card_cache->drain(worker_i, g1_rem_set(), into_cset_dcq); |
889 | 2325 |
342 | 2326 DirtyCardQueueSet& dcqs = JavaThread::dirty_card_queue_set(); |
2327 int n_completed_buffers = 0; | |
1705 | 2328 while (dcqs.apply_closure_to_completed_buffer(cl, worker_i, 0, true)) { |
342 | 2329 n_completed_buffers++; |
2330 } | |
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
|
2331 g1_policy()->phase_times()->record_update_rs_processed_buffers(worker_i, n_completed_buffers); |
342 | 2332 dcqs.clear_n_completed_buffers(); |
2333 assert(!dcqs.completed_buffers_exist_dirty(), "Completed buffers exist!"); | |
2334 } | |
2335 | |
2336 | |
2337 // Computes the sum of the storage used by the various regions. | |
2338 | |
2339 size_t G1CollectedHeap::used() const { | |
862
36b5611220a7
6863216: Clean up debugging debris inadvertently pushed with 6700789
ysr
parents:
861
diff
changeset
|
2340 assert(Heap_lock->owner() != NULL, |
36b5611220a7
6863216: Clean up debugging debris inadvertently pushed with 6700789
ysr
parents:
861
diff
changeset
|
2341 "Should be owned on this thread's behalf."); |
342 | 2342 size_t result = _summary_bytes_used; |
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
2343 // Read only once in case it is set to NULL concurrently |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2344 HeapRegion* hr = _mutator_alloc_region.get(); |
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
2345 if (hr != NULL) |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
2346 result += hr->used(); |
342 | 2347 return result; |
2348 } | |
2349 | |
846
42d84bbbecf4
6859911: G1: assert(Heap_lock->owner() = NULL, "Should be owned on this thread's behalf")
tonyp
parents:
845
diff
changeset
|
2350 size_t G1CollectedHeap::used_unlocked() const { |
42d84bbbecf4
6859911: G1: assert(Heap_lock->owner() = NULL, "Should be owned on this thread's behalf")
tonyp
parents:
845
diff
changeset
|
2351 size_t result = _summary_bytes_used; |
42d84bbbecf4
6859911: G1: assert(Heap_lock->owner() = NULL, "Should be owned on this thread's behalf")
tonyp
parents:
845
diff
changeset
|
2352 return result; |
42d84bbbecf4
6859911: G1: assert(Heap_lock->owner() = NULL, "Should be owned on this thread's behalf")
tonyp
parents:
845
diff
changeset
|
2353 } |
42d84bbbecf4
6859911: G1: assert(Heap_lock->owner() = NULL, "Should be owned on this thread's behalf")
tonyp
parents:
845
diff
changeset
|
2354 |
342 | 2355 class SumUsedClosure: public HeapRegionClosure { |
2356 size_t _used; | |
2357 public: | |
2358 SumUsedClosure() : _used(0) {} | |
2359 bool doHeapRegion(HeapRegion* r) { | |
2360 if (!r->continuesHumongous()) { | |
2361 _used += r->used(); | |
2362 } | |
2363 return false; | |
2364 } | |
2365 size_t result() { return _used; } | |
2366 }; | |
2367 | |
2368 size_t G1CollectedHeap::recalculate_used() const { | |
17757
eff02b5bd56c
8035654: Add times for evacuation failure handling in "Other" time
tschatzl
parents:
17756
diff
changeset
|
2369 double recalculate_used_start = os::elapsedTime(); |
eff02b5bd56c
8035654: Add times for evacuation failure handling in "Other" time
tschatzl
parents:
17756
diff
changeset
|
2370 |
342 | 2371 SumUsedClosure blk; |
3766 | 2372 heap_region_iterate(&blk); |
17757
eff02b5bd56c
8035654: Add times for evacuation failure handling in "Other" time
tschatzl
parents:
17756
diff
changeset
|
2373 |
eff02b5bd56c
8035654: Add times for evacuation failure handling in "Other" time
tschatzl
parents:
17756
diff
changeset
|
2374 g1_policy()->phase_times()->record_evac_fail_recalc_used_time((os::elapsedTime() - recalculate_used_start) * 1000.0); |
342 | 2375 return blk.result(); |
2376 } | |
2377 | |
2378 size_t G1CollectedHeap::unsafe_max_alloc() { | |
2152 | 2379 if (free_regions() > 0) return HeapRegion::GrainBytes; |
342 | 2380 // otherwise, is there space in the current allocation region? |
2381 | |
2382 // We need to store the current allocation region in a local variable | |
2383 // here. The problem is that this method doesn't take any locks and | |
2384 // there may be other threads which overwrite the current allocation | |
2385 // region field. attempt_allocation(), for example, sets it to NULL | |
2386 // and this can happen *after* the NULL check here but before the call | |
2387 // to free(), resulting in a SIGSEGV. Note that this doesn't appear | |
2388 // to be a problem in the optimized build, since the two loads of the | |
2389 // current allocation region field are optimized away. | |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2390 HeapRegion* hr = _mutator_alloc_region.get(); |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2391 if (hr == NULL) { |
342 | 2392 return 0; |
2393 } | |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2394 return hr->free(); |
342 | 2395 } |
2396 | |
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2397 bool G1CollectedHeap::should_do_concurrent_full_gc(GCCause::Cause cause) { |
4910
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2398 switch (cause) { |
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2399 case GCCause::_gc_locker: return GCLockerInvokesConcurrent; |
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2400 case GCCause::_java_lang_system_gc: return ExplicitGCInvokesConcurrent; |
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2401 case GCCause::_g1_humongous_allocation: return true; |
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2402 default: return false; |
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2403 } |
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2404 } |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2405 |
3285
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2406 #ifndef PRODUCT |
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2407 void G1CollectedHeap::allocate_dummy_regions() { |
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2408 // Let's fill up most of the region |
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2409 size_t word_size = HeapRegion::GrainWords - 1024; |
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2410 // And as a result the region we'll allocate will be humongous. |
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2411 guarantee(isHumongous(word_size), "sanity"); |
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2412 |
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2413 for (uintx i = 0; i < G1DummyRegionsPerGC; ++i) { |
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2414 // Let's use the existing mechanism for the allocation |
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2415 HeapWord* dummy_obj = humongous_obj_allocate(word_size); |
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2416 if (dummy_obj != NULL) { |
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2417 MemRegion mr(dummy_obj, word_size); |
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2418 CollectedHeap::fill_with_object(mr); |
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2419 } else { |
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2420 // 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
|
2421 // again. Let's get out of the loop. |
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2422 break; |
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2423 } |
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2424 } |
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2425 } |
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2426 #endif // !PRODUCT |
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2427 |
8505
dee7c8b578c7
-Integration of WB Serial Snippets-Integration of G1 WB Snippets (partially working)-Fix allocation bug with -XX:-UseTLAB and -XX:+UseSerialGC
Christos Kotselidis <christos.kotselidis@oracle.com>
parents:
8504
diff
changeset
|
2428 #ifdef GRAAL |
dee7c8b578c7
-Integration of WB Serial Snippets-Integration of G1 WB Snippets (partially working)-Fix allocation bug with -XX:-UseTLAB and -XX:+UseSerialGC
Christos Kotselidis <christos.kotselidis@oracle.com>
parents:
8504
diff
changeset
|
2429 HeapWord** G1CollectedHeap::top_addr() const { |
dee7c8b578c7
-Integration of WB Serial Snippets-Integration of G1 WB Snippets (partially working)-Fix allocation bug with -XX:-UseTLAB and -XX:+UseSerialGC
Christos Kotselidis <christos.kotselidis@oracle.com>
parents:
8504
diff
changeset
|
2430 return _mutator_alloc_region.top_addr(); |
dee7c8b578c7
-Integration of WB Serial Snippets-Integration of G1 WB Snippets (partially working)-Fix allocation bug with -XX:-UseTLAB and -XX:+UseSerialGC
Christos Kotselidis <christos.kotselidis@oracle.com>
parents:
8504
diff
changeset
|
2431 } |
dee7c8b578c7
-Integration of WB Serial Snippets-Integration of G1 WB Snippets (partially working)-Fix allocation bug with -XX:-UseTLAB and -XX:+UseSerialGC
Christos Kotselidis <christos.kotselidis@oracle.com>
parents:
8504
diff
changeset
|
2432 |
dee7c8b578c7
-Integration of WB Serial Snippets-Integration of G1 WB Snippets (partially working)-Fix allocation bug with -XX:-UseTLAB and -XX:+UseSerialGC
Christos Kotselidis <christos.kotselidis@oracle.com>
parents:
8504
diff
changeset
|
2433 HeapWord** G1CollectedHeap::end_addr() const { |
dee7c8b578c7
-Integration of WB Serial Snippets-Integration of G1 WB Snippets (partially working)-Fix allocation bug with -XX:-UseTLAB and -XX:+UseSerialGC
Christos Kotselidis <christos.kotselidis@oracle.com>
parents:
8504
diff
changeset
|
2434 return _mutator_alloc_region.end_addr(); |
dee7c8b578c7
-Integration of WB Serial Snippets-Integration of G1 WB Snippets (partially working)-Fix allocation bug with -XX:-UseTLAB and -XX:+UseSerialGC
Christos Kotselidis <christos.kotselidis@oracle.com>
parents:
8504
diff
changeset
|
2435 } |
dee7c8b578c7
-Integration of WB Serial Snippets-Integration of G1 WB Snippets (partially working)-Fix allocation bug with -XX:-UseTLAB and -XX:+UseSerialGC
Christos Kotselidis <christos.kotselidis@oracle.com>
parents:
8504
diff
changeset
|
2436 #endif |
dee7c8b578c7
-Integration of WB Serial Snippets-Integration of G1 WB Snippets (partially working)-Fix allocation bug with -XX:-UseTLAB and -XX:+UseSerialGC
Christos Kotselidis <christos.kotselidis@oracle.com>
parents:
8504
diff
changeset
|
2437 |
6120
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2438 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
|
2439 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
|
2440 _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
|
2441 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
|
2442 _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
|
2443 |
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2444 _old_marking_cycles_started++; |
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2445 } |
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2446 |
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2447 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
|
2448 MonitorLockerEx x(FullGCCount_lock, Mutex::_no_safepoint_check_flag); |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2449 |
2030
fb712ff22571
7000559: G1: assertion failure !outer || (full_collections_started == _full_collections_completed + 1)
tonyp
parents:
1995
diff
changeset
|
2450 // 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
|
2451 // 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
|
2452 // 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
|
2453 // assert here. |
fb712ff22571
7000559: G1: assertion failure !outer || (full_collections_started == _full_collections_completed + 1)
tonyp
parents:
1995
diff
changeset
|
2454 |
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2455 // Given that this method is called at the end of a Full GC or of a |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2456 // concurrent cycle, and those can be nested (i.e., a Full GC can |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2457 // interrupt a concurrent cycle), the number of full collections |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2458 // completed should be either one (in the case where there was no |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2459 // nesting) or two (when a Full GC interrupted a concurrent cycle) |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2460 // behind the number of full collections started. |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2461 |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2462 // This is the case for the inner caller, i.e. a Full GC. |
2030
fb712ff22571
7000559: G1: assertion failure !outer || (full_collections_started == _full_collections_completed + 1)
tonyp
parents:
1995
diff
changeset
|
2463 assert(concurrent || |
6120
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2464 (_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
|
2465 (_old_marking_cycles_started == _old_marking_cycles_completed + 2), |
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2466 err_msg("for inner caller (Full GC): _old_marking_cycles_started = %u " |
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2467 "is inconsistent with _old_marking_cycles_completed = %u", |
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2468 _old_marking_cycles_started, _old_marking_cycles_completed)); |
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2469 |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2470 // This is the case for the outer caller, i.e. the concurrent cycle. |
2030
fb712ff22571
7000559: G1: assertion failure !outer || (full_collections_started == _full_collections_completed + 1)
tonyp
parents:
1995
diff
changeset
|
2471 assert(!concurrent || |
6120
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2472 (_old_marking_cycles_started == _old_marking_cycles_completed + 1), |
2030
fb712ff22571
7000559: G1: assertion failure !outer || (full_collections_started == _full_collections_completed + 1)
tonyp
parents:
1995
diff
changeset
|
2473 err_msg("for outer caller (concurrent cycle): " |
6120
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2474 "_old_marking_cycles_started = %u " |
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2475 "is inconsistent with _old_marking_cycles_completed = %u", |
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2476 _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
|
2477 |
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2478 _old_marking_cycles_completed += 1; |
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2479 |
1840
4e0094bc41fa
6983311: G1: LoopTest hangs when run with -XX:+ExplicitInvokesConcurrent
johnc
parents:
1833
diff
changeset
|
2480 // 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
|
2481 // we wake up any waiters (especially when ExplicitInvokesConcurrent |
4e0094bc41fa
6983311: G1: LoopTest hangs when run with -XX:+ExplicitInvokesConcurrent
johnc
parents:
1833
diff
changeset
|
2482 // is set) so that if a waiter requests another System.gc() it doesn't |
10405 | 2483 // incorrectly see that a marking cycle is still in progress. |
2030
fb712ff22571
7000559: G1: assertion failure !outer || (full_collections_started == _full_collections_completed + 1)
tonyp
parents:
1995
diff
changeset
|
2484 if (concurrent) { |
1840
4e0094bc41fa
6983311: G1: LoopTest hangs when run with -XX:+ExplicitInvokesConcurrent
johnc
parents:
1833
diff
changeset
|
2485 _cmThread->clear_in_progress(); |
4e0094bc41fa
6983311: G1: LoopTest hangs when run with -XX:+ExplicitInvokesConcurrent
johnc
parents:
1833
diff
changeset
|
2486 } |
4e0094bc41fa
6983311: G1: LoopTest hangs when run with -XX:+ExplicitInvokesConcurrent
johnc
parents:
1833
diff
changeset
|
2487 |
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2488 // This notify_all() will ensure that a thread that called |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2489 // System.gc() with (with ExplicitGCInvokesConcurrent set or not) |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2490 // 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
|
2491 // waiting in VM_G1IncCollectionPause::doit_epilogue(). |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2492 FullGCCount_lock->notify_all(); |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2493 } |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2494 |
13400
86e6d691f2e1
8028128: Add a type safe alternative for working with counter based data
mgronlun
parents:
13062
diff
changeset
|
2495 void G1CollectedHeap::register_concurrent_cycle_start(const Ticks& start_time) { |
10405 | 2496 _concurrent_cycle_started = true; |
2497 _gc_timer_cm->register_gc_start(start_time); | |
2498 | |
2499 _gc_tracer_cm->report_gc_start(gc_cause(), _gc_timer_cm->gc_start()); | |
2500 trace_heap_before_gc(_gc_tracer_cm); | |
2501 } | |
2502 | |
2503 void G1CollectedHeap::register_concurrent_cycle_end() { | |
2504 if (_concurrent_cycle_started) { | |
2505 if (_cm->has_aborted()) { | |
2506 _gc_tracer_cm->report_concurrent_mode_failure(); | |
2507 } | |
12179
f175e3678be2
8020692: TestGCEventMixed.java failed because of timestamp in event after end event
ehelin
parents:
12116
diff
changeset
|
2508 |
13400
86e6d691f2e1
8028128: Add a type safe alternative for working with counter based data
mgronlun
parents:
13062
diff
changeset
|
2509 _gc_timer_cm->register_gc_end(); |
10405 | 2510 _gc_tracer_cm->report_gc_end(_gc_timer_cm->gc_end(), _gc_timer_cm->time_partitions()); |
2511 | |
2512 _concurrent_cycle_started = false; | |
2513 } | |
2514 } | |
2515 | |
2516 void G1CollectedHeap::trace_heap_after_concurrent_cycle() { | |
2517 if (_concurrent_cycle_started) { | |
2518 trace_heap_after_gc(_gc_tracer_cm); | |
2519 } | |
2520 } | |
2521 | |
2522 G1YCType G1CollectedHeap::yc_type() { | |
2523 bool is_young = g1_policy()->gcs_are_young(); | |
2524 bool is_initial_mark = g1_policy()->during_initial_mark_pause(); | |
2525 bool is_during_mark = mark_in_progress(); | |
2526 | |
2527 if (is_initial_mark) { | |
2528 return InitialMark; | |
2529 } else if (is_during_mark) { | |
2530 return DuringMark; | |
2531 } else if (is_young) { | |
2532 return Normal; | |
2533 } else { | |
2534 return Mixed; | |
2535 } | |
2536 } | |
2537 | |
1088
3fc996d4edd2
6902303: G1: ScavengeALot should cause an incremental, rather than a full, collection
ysr
parents:
1045
diff
changeset
|
2538 void G1CollectedHeap::collect(GCCause::Cause cause) { |
4910
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2539 assert_heap_not_locked(); |
1088
3fc996d4edd2
6902303: G1: ScavengeALot should cause an incremental, rather than a full, collection
ysr
parents:
1045
diff
changeset
|
2540 |
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2541 unsigned int gc_count_before; |
6120
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2542 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
|
2543 bool retry_gc; |
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2544 |
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2545 do { |
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2546 retry_gc = false; |
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2547 |
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2548 { |
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2549 MutexLocker ml(Heap_lock); |
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2550 |
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2551 // 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
|
2552 gc_count_before = total_collections(); |
6120
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2553 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
|
2554 } |
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2555 |
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2556 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
|
2557 // 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
|
2558 // 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
|
2559 // we are not requesting a post-GC allocation. |
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2560 VM_G1IncCollectionPause op(gc_count_before, |
1973 | 2561 0, /* word_size */ |
4910
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2562 true, /* should_initiate_conc_mark */ |
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2563 g1_policy()->max_pause_time_ms(), |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2564 cause); |
5963
64bf7c8270cb
7147724: G1: hang in SurrogateLockerThread::manipulatePLL
johnc
parents:
4912
diff
changeset
|
2565 |
1088
3fc996d4edd2
6902303: G1: ScavengeALot should cause an incremental, rather than a full, collection
ysr
parents:
1045
diff
changeset
|
2566 VMThread::execute(&op); |
4910
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2567 if (!op.pause_succeeded()) { |
6120
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2568 if (old_marking_count_before == _old_marking_cycles_started) { |
5963
64bf7c8270cb
7147724: G1: hang in SurrogateLockerThread::manipulatePLL
johnc
parents:
4912
diff
changeset
|
2569 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
|
2570 } else { |
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2571 // 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
|
2572 // 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
|
2573 // 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
|
2574 } |
5963
64bf7c8270cb
7147724: G1: hang in SurrogateLockerThread::manipulatePLL
johnc
parents:
4912
diff
changeset
|
2575 |
64bf7c8270cb
7147724: G1: hang in SurrogateLockerThread::manipulatePLL
johnc
parents:
4912
diff
changeset
|
2576 if (retry_gc) { |
64bf7c8270cb
7147724: G1: hang in SurrogateLockerThread::manipulatePLL
johnc
parents:
4912
diff
changeset
|
2577 if (GC_locker::is_active_and_needs_gc()) { |
64bf7c8270cb
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2578 GC_locker::stall_until_clear(); |
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2579 } |
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2580 } |
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2581 } |
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2582 } else { |
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2583 if (cause == GCCause::_gc_locker |
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2584 DEBUG_ONLY(|| cause == GCCause::_scavenge_alot)) { |
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2585 |
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2586 // Schedule a standard evacuation pause. We're setting word_size |
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2587 // to 0 which means that we are not requesting a post-GC allocation. |
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2588 VM_G1IncCollectionPause op(gc_count_before, |
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2589 0, /* word_size */ |
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2590 false, /* should_initiate_conc_mark */ |
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2591 g1_policy()->max_pause_time_ms(), |
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2592 cause); |
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2593 VMThread::execute(&op); |
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2594 } else { |
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2595 // Schedule a Full GC. |
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2596 VM_G1CollectFull op(gc_count_before, old_marking_count_before, cause); |
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2597 VMThread::execute(&op); |
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2598 } |
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2599 } |
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2600 } while (retry_gc); |
342 | 2601 } |
2602 | |
2603 bool G1CollectedHeap::is_in(const void* p) const { | |
4708 | 2604 if (_g1_committed.contains(p)) { |
2605 // Given that we know that p is in the committed space, | |
2606 // heap_region_containing_raw() should successfully | |
2607 // return the containing region. | |
2608 HeapRegion* hr = heap_region_containing_raw(p); | |
342 | 2609 return hr->is_in(p); |
2610 } else { | |
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2611 return false; |
342 | 2612 } |
2613 } | |
2614 | |
2615 // Iteration functions. | |
2616 | |
2617 // Iterates an OopClosure over all ref-containing fields of objects | |
2618 // within a HeapRegion. | |
2619 | |
2620 class IterateOopClosureRegionClosure: public HeapRegionClosure { | |
2621 MemRegion _mr; | |
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2622 ExtendedOopClosure* _cl; |
342 | 2623 public: |
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2624 IterateOopClosureRegionClosure(MemRegion mr, ExtendedOopClosure* cl) |
342 | 2625 : _mr(mr), _cl(cl) {} |
2626 bool doHeapRegion(HeapRegion* r) { | |
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2627 if (!r->continuesHumongous()) { |
342 | 2628 r->oop_iterate(_cl); |
2629 } | |
2630 return false; | |
2631 } | |
2632 }; | |
2633 | |
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2634 void G1CollectedHeap::oop_iterate(ExtendedOopClosure* cl) { |
342 | 2635 IterateOopClosureRegionClosure blk(_g1_committed, cl); |
3766 | 2636 heap_region_iterate(&blk); |
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2637 } |
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2638 |
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2639 void G1CollectedHeap::oop_iterate(MemRegion mr, ExtendedOopClosure* cl) { |
342 | 2640 IterateOopClosureRegionClosure blk(mr, cl); |
3766 | 2641 heap_region_iterate(&blk); |
342 | 2642 } |
2643 | |
2644 // Iterates an ObjectClosure over all objects within a HeapRegion. | |
2645 | |
2646 class IterateObjectClosureRegionClosure: public HeapRegionClosure { | |
2647 ObjectClosure* _cl; | |
2648 public: | |
2649 IterateObjectClosureRegionClosure(ObjectClosure* cl) : _cl(cl) {} | |
2650 bool doHeapRegion(HeapRegion* r) { | |
2651 if (! r->continuesHumongous()) { | |
2652 r->object_iterate(_cl); | |
2653 } | |
2654 return false; | |
2655 } | |
2656 }; | |
2657 | |
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2658 void G1CollectedHeap::object_iterate(ObjectClosure* cl) { |
342 | 2659 IterateObjectClosureRegionClosure blk(cl); |
3766 | 2660 heap_region_iterate(&blk); |
342 | 2661 } |
2662 | |
2663 // Calls a SpaceClosure on a HeapRegion. | |
2664 | |
2665 class SpaceClosureRegionClosure: public HeapRegionClosure { | |
2666 SpaceClosure* _cl; | |
2667 public: | |
2668 SpaceClosureRegionClosure(SpaceClosure* cl) : _cl(cl) {} | |
2669 bool doHeapRegion(HeapRegion* r) { | |
2670 _cl->do_space(r); | |
2671 return false; | |
2672 } | |
2673 }; | |
2674 | |
2675 void G1CollectedHeap::space_iterate(SpaceClosure* cl) { | |
2676 SpaceClosureRegionClosure blk(cl); | |
3766 | 2677 heap_region_iterate(&blk); |
342 | 2678 } |
2679 | |
3766 | 2680 void G1CollectedHeap::heap_region_iterate(HeapRegionClosure* cl) const { |
2681 _hrs.iterate(cl); | |
342 | 2682 } |
2683 | |
2684 void | |
2685 G1CollectedHeap::heap_region_par_iterate_chunked(HeapRegionClosure* cl, | |
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2686 uint worker_id, |
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2687 uint no_of_par_workers, |
342 | 2688 jint claim_value) { |
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2689 const uint regions = n_regions(); |
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2690 const uint max_workers = (G1CollectedHeap::use_parallel_gc_threads() ? |
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2691 no_of_par_workers : |
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|
2692 1); |
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|
2693 assert(UseDynamicNumberOfGCThreads || |
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|
2694 no_of_par_workers == workers()->total_workers(), |
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2695 "Non dynamic should use fixed number of workers"); |
355 | 2696 // try to spread out the starting points of the workers |
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2697 const HeapRegion* start_hr = |
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2698 start_region_for_worker(worker_id, no_of_par_workers); |
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2699 const uint start_index = start_hr->hrs_index(); |
355 | 2700 |
2701 // each worker will actually look at all regions | |
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2702 for (uint count = 0; count < regions; ++count) { |
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2703 const uint index = (start_index + count) % regions; |
355 | 2704 assert(0 <= index && index < regions, "sanity"); |
2705 HeapRegion* r = region_at(index); | |
2706 // we'll ignore "continues humongous" regions (we'll process them | |
2707 // when we come across their corresponding "start humongous" | |
2708 // region) and regions already claimed | |
2709 if (r->claim_value() == claim_value || r->continuesHumongous()) { | |
2710 continue; | |
2711 } | |
2712 // OK, try to claim it | |
342 | 2713 if (r->claimHeapRegion(claim_value)) { |
355 | 2714 // success! |
2715 assert(!r->continuesHumongous(), "sanity"); | |
2716 if (r->startsHumongous()) { | |
2717 // If the region is "starts humongous" we'll iterate over its | |
2718 // "continues humongous" first; in fact we'll do them | |
2719 // first. The order is important. In on case, calling the | |
2720 // closure on the "starts humongous" region might de-allocate | |
2721 // and clear all its "continues humongous" regions and, as a | |
2722 // result, we might end up processing them twice. So, we'll do | |
2723 // them first (notice: most closures will ignore them anyway) and | |
2724 // then we'll do the "starts humongous" region. | |
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2725 for (uint ch_index = index + 1; ch_index < regions; ++ch_index) { |
355 | 2726 HeapRegion* chr = region_at(ch_index); |
2727 | |
2728 // if the region has already been claimed or it's not | |
2729 // "continues humongous" we're done | |
2730 if (chr->claim_value() == claim_value || | |
2731 !chr->continuesHumongous()) { | |
2732 break; | |
2733 } | |
2734 | |
10405 | 2735 // No one should have claimed it directly. We can given |
355 | 2736 // that we claimed its "starts humongous" region. |
2737 assert(chr->claim_value() != claim_value, "sanity"); | |
2738 assert(chr->humongous_start_region() == r, "sanity"); | |
2739 | |
2740 if (chr->claimHeapRegion(claim_value)) { | |
10405 | 2741 // we should always be able to claim it; no one else should |
355 | 2742 // be trying to claim this region |
2743 | |
2744 bool res2 = cl->doHeapRegion(chr); | |
2745 assert(!res2, "Should not abort"); | |
2746 | |
2747 // Right now, this holds (i.e., no closure that actually | |
2748 // does something with "continues humongous" regions | |
2749 // clears them). We might have to weaken it in the future, | |
2750 // but let's leave these two asserts here for extra safety. | |
2751 assert(chr->continuesHumongous(), "should still be the case"); | |
2752 assert(chr->humongous_start_region() == r, "sanity"); | |
2753 } else { | |
2754 guarantee(false, "we should not reach here"); | |
2755 } | |
2756 } | |
2757 } | |
2758 | |
2759 assert(!r->continuesHumongous(), "sanity"); | |
2760 bool res = cl->doHeapRegion(r); | |
2761 assert(!res, "Should not abort"); | |
2762 } | |
2763 } | |
2764 } | |
2765 | |
390 | 2766 class ResetClaimValuesClosure: public HeapRegionClosure { |
2767 public: | |
2768 bool doHeapRegion(HeapRegion* r) { | |
2769 r->set_claim_value(HeapRegion::InitialClaimValue); | |
2770 return false; | |
2771 } | |
2772 }; | |
2773 | |
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2774 void G1CollectedHeap::reset_heap_region_claim_values() { |
390 | 2775 ResetClaimValuesClosure blk; |
2776 heap_region_iterate(&blk); | |
2777 } | |
2778 | |
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2779 void G1CollectedHeap::reset_cset_heap_region_claim_values() { |
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2780 ResetClaimValuesClosure blk; |
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|
2781 collection_set_iterate(&blk); |
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|
2782 } |
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2783 |
355 | 2784 #ifdef ASSERT |
2785 // This checks whether all regions in the heap have the correct claim | |
2786 // value. I also piggy-backed on this a check to ensure that the | |
2787 // humongous_start_region() information on "continues humongous" | |
2788 // regions is correct. | |
2789 | |
2790 class CheckClaimValuesClosure : public HeapRegionClosure { | |
2791 private: | |
2792 jint _claim_value; | |
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2793 uint _failures; |
355 | 2794 HeapRegion* _sh_region; |
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2795 |
355 | 2796 public: |
2797 CheckClaimValuesClosure(jint claim_value) : | |
2798 _claim_value(claim_value), _failures(0), _sh_region(NULL) { } | |
2799 bool doHeapRegion(HeapRegion* r) { | |
2800 if (r->claim_value() != _claim_value) { | |
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2801 gclog_or_tty->print_cr("Region " HR_FORMAT ", " |
355 | 2802 "claim value = %d, should be %d", |
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2803 HR_FORMAT_PARAMS(r), |
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2804 r->claim_value(), _claim_value); |
355 | 2805 ++_failures; |
2806 } | |
2807 if (!r->isHumongous()) { | |
2808 _sh_region = NULL; | |
2809 } else if (r->startsHumongous()) { | |
2810 _sh_region = r; | |
2811 } else if (r->continuesHumongous()) { | |
2812 if (r->humongous_start_region() != _sh_region) { | |
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2813 gclog_or_tty->print_cr("Region " HR_FORMAT ", " |
355 | 2814 "HS = "PTR_FORMAT", should be "PTR_FORMAT, |
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2815 HR_FORMAT_PARAMS(r), |
355 | 2816 r->humongous_start_region(), |
2817 _sh_region); | |
2818 ++_failures; | |
342 | 2819 } |
2820 } | |
355 | 2821 return false; |
2822 } | |
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2823 uint failures() { return _failures; } |
355 | 2824 }; |
2825 | |
2826 bool G1CollectedHeap::check_heap_region_claim_values(jint claim_value) { | |
2827 CheckClaimValuesClosure cl(claim_value); | |
2828 heap_region_iterate(&cl); | |
2829 return cl.failures() == 0; | |
2830 } | |
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2831 |
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2832 class CheckClaimValuesInCSetHRClosure: public HeapRegionClosure { |
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2833 private: |
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2834 jint _claim_value; |
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2835 uint _failures; |
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2836 |
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2837 public: |
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2838 CheckClaimValuesInCSetHRClosure(jint claim_value) : |
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2839 _claim_value(claim_value), _failures(0) { } |
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2840 |
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2841 uint failures() { return _failures; } |
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2842 |
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2843 bool doHeapRegion(HeapRegion* hr) { |
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2844 assert(hr->in_collection_set(), "how?"); |
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2845 assert(!hr->isHumongous(), "H-region in CSet"); |
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2846 if (hr->claim_value() != _claim_value) { |
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2847 gclog_or_tty->print_cr("CSet Region " HR_FORMAT ", " |
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7112743: G1: Reduce overhead of marking closure during evacuation pauses
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parents:
4095
diff
changeset
|
2848 "claim value = %d, should be %d", |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2849 HR_FORMAT_PARAMS(hr), |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2850 hr->claim_value(), _claim_value); |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2851 _failures += 1; |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2852 } |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2853 return false; |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2854 } |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2855 }; |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2856 |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2857 bool G1CollectedHeap::check_cset_heap_region_claim_values(jint claim_value) { |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2858 CheckClaimValuesInCSetHRClosure cl(claim_value); |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2859 collection_set_iterate(&cl); |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2860 return cl.failures() == 0; |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2861 } |
355 | 2862 #endif // ASSERT |
342 | 2863 |
4709
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2864 // Clear the cached CSet starting regions and (more importantly) |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2865 // the time stamps. Called when we reset the GC time stamp. |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2866 void G1CollectedHeap::clear_cset_start_regions() { |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2867 assert(_worker_cset_start_region != NULL, "sanity"); |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2868 assert(_worker_cset_start_region_time_stamp != NULL, "sanity"); |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2869 |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2870 int n_queues = MAX2((int)ParallelGCThreads, 1); |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2871 for (int i = 0; i < n_queues; i++) { |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2872 _worker_cset_start_region[i] = NULL; |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2873 _worker_cset_start_region_time_stamp[i] = 0; |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2874 } |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2875 } |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2876 |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2877 // Given the id of a worker, obtain or calculate a suitable |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2878 // 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
|
2879 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
|
2880 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
|
2881 |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2882 HeapRegion* result = NULL; |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2883 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
|
2884 |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2885 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
|
2886 // 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
|
2887 // 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
|
2888 // 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
|
2889 // (when the collection set is empty). |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2890 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
|
2891 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
|
2892 return result; |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2893 } |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2894 |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2895 // 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
|
2896 // 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
|
2897 |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2898 // 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
|
2899 // 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
|
2900 // avoid contention. |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2901 // If we have: |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2902 // n collection set regions |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2903 // p threads |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2904 // 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
|
2905 |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2906 result = g1_policy()->collection_set(); |
4097
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2907 if (G1CollectedHeap::use_parallel_gc_threads()) { |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
2908 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
|
2909 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
|
2910 assert(UseDynamicNumberOfGCThreads || |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2911 active_workers == workers()->total_workers(), |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2912 "Unless dynamic should use total workers"); |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2913 |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
2914 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
|
2915 uint start_ind = 0; |
4709
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2916 |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2917 if (worker_i > 0 && |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2918 _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
|
2919 // Previous workers starting region is valid |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2920 // so let's iterate from there |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2921 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
|
2922 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
|
2923 } |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2924 |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
2925 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
|
2926 result = result->next_in_collection_set(); |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2927 } |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2928 } |
4709
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2929 |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2930 // 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
|
2931 // (when the collection set is empty). |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2932 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
|
2933 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
|
2934 "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
|
2935 _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
|
2936 OrderAccess::storestore(); |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2937 _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
|
2938 return result; |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2939 } |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2940 |
6254
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2941 HeapRegion* G1CollectedHeap::start_region_for_worker(uint worker_i, |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2942 uint no_of_par_workers) { |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2943 uint worker_num = |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2944 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
|
2945 assert(UseDynamicNumberOfGCThreads || |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2946 no_of_par_workers == workers()->total_workers(), |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2947 "Non dynamic should use fixed number of workers"); |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2948 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
|
2949 return region_at(start_index); |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2950 } |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2951 |
342 | 2952 void G1CollectedHeap::collection_set_iterate(HeapRegionClosure* cl) { |
2953 HeapRegion* r = g1_policy()->collection_set(); | |
2954 while (r != NULL) { | |
2955 HeapRegion* next = r->next_in_collection_set(); | |
2956 if (cl->doHeapRegion(r)) { | |
2957 cl->incomplete(); | |
2958 return; | |
2959 } | |
2960 r = next; | |
2961 } | |
2962 } | |
2963 | |
2964 void G1CollectedHeap::collection_set_iterate_from(HeapRegion* r, | |
2965 HeapRegionClosure *cl) { | |
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2966 if (r == NULL) { |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2967 // 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
|
2968 return; |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2969 } |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2970 |
342 | 2971 assert(r->in_collection_set(), |
2972 "Start region must be a member of the collection set."); | |
2973 HeapRegion* cur = r; | |
2974 while (cur != NULL) { | |
2975 HeapRegion* next = cur->next_in_collection_set(); | |
2976 if (cl->doHeapRegion(cur) && false) { | |
2977 cl->incomplete(); | |
2978 return; | |
2979 } | |
2980 cur = next; | |
2981 } | |
2982 cur = g1_policy()->collection_set(); | |
2983 while (cur != r) { | |
2984 HeapRegion* next = cur->next_in_collection_set(); | |
2985 if (cl->doHeapRegion(cur) && false) { | |
2986 cl->incomplete(); | |
2987 return; | |
2988 } | |
2989 cur = next; | |
2990 } | |
2991 } | |
2992 | |
2993 CompactibleSpace* G1CollectedHeap::first_compactible_space() { | |
3766 | 2994 return n_regions() > 0 ? region_at(0) : NULL; |
342 | 2995 } |
2996 | |
2997 | |
2998 Space* G1CollectedHeap::space_containing(const void* addr) const { | |
2999 Space* res = heap_region_containing(addr); | |
3000 return res; | |
3001 } | |
3002 | |
3003 HeapWord* G1CollectedHeap::block_start(const void* addr) const { | |
3004 Space* sp = space_containing(addr); | |
3005 if (sp != NULL) { | |
3006 return sp->block_start(addr); | |
3007 } | |
3008 return NULL; | |
3009 } | |
3010 | |
3011 size_t G1CollectedHeap::block_size(const HeapWord* addr) const { | |
3012 Space* sp = space_containing(addr); | |
3013 assert(sp != NULL, "block_size of address outside of heap"); | |
3014 return sp->block_size(addr); | |
3015 } | |
3016 | |
3017 bool G1CollectedHeap::block_is_obj(const HeapWord* addr) const { | |
3018 Space* sp = space_containing(addr); | |
3019 return sp->block_is_obj(addr); | |
3020 } | |
3021 | |
3022 bool G1CollectedHeap::supports_tlab_allocation() const { | |
3023 return true; | |
3024 } | |
3025 | |
3026 size_t G1CollectedHeap::tlab_capacity(Thread* ignored) const { | |
17727 | 3027 return (_g1_policy->young_list_target_length() - young_list()->survivor_length()) * HeapRegion::GrainBytes; |
3028 } | |
3029 | |
3030 size_t G1CollectedHeap::tlab_used(Thread* ignored) const { | |
3031 return young_list()->eden_used_bytes(); | |
3032 } | |
3033 | |
3034 // For G1 TLABs should not contain humongous objects, so the maximum TLAB size | |
3035 // must be smaller than the humongous object limit. | |
3036 size_t G1CollectedHeap::max_tlab_size() const { | |
3037 return align_size_down(_humongous_object_threshold_in_words - 1, MinObjAlignment); | |
342 | 3038 } |
3039 | |
3040 size_t G1CollectedHeap::unsafe_max_tlab_alloc(Thread* ignored) const { | |
3041 // Return the remaining space in the cur alloc region, but not less than | |
3042 // the min TLAB size. | |
1313
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3043 |
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3044 // Also, this value can be at most the humongous object threshold, |
10405 | 3045 // since we can't allow tlabs to grow big enough to accommodate |
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3046 // humongous objects. |
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3047 |
2433
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3048 HeapRegion* hr = _mutator_alloc_region.get(); |
17727 | 3049 size_t max_tlab = max_tlab_size() * wordSize; |
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3050 if (hr == NULL) { |
17727 | 3051 return max_tlab; |
342 | 3052 } else { |
17727 | 3053 return MIN2(MAX2(hr->free(), (size_t) MinTLABSize), max_tlab); |
342 | 3054 } |
3055 } | |
3056 | |
3057 size_t G1CollectedHeap::max_capacity() const { | |
2188
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3058 return _g1_reserved.byte_size(); |
342 | 3059 } |
3060 | |
3061 jlong G1CollectedHeap::millis_since_last_gc() { | |
3062 // assert(false, "NYI"); | |
3063 return 0; | |
3064 } | |
3065 | |
3066 void G1CollectedHeap::prepare_for_verify() { | |
3067 if (SafepointSynchronize::is_at_safepoint() || ! UseTLAB) { | |
3068 ensure_parsability(false); | |
3069 } | |
3070 g1_rem_set()->prepare_for_verify(); | |
3071 } | |
3072 | |
6254
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3073 bool G1CollectedHeap::allocated_since_marking(oop obj, HeapRegion* hr, |
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3074 VerifyOption vo) { |
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3075 switch (vo) { |
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3076 case VerifyOption_G1UsePrevMarking: |
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3077 return hr->obj_allocated_since_prev_marking(obj); |
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3078 case VerifyOption_G1UseNextMarking: |
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3079 return hr->obj_allocated_since_next_marking(obj); |
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3080 case VerifyOption_G1UseMarkWord: |
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3081 return false; |
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|
3082 default: |
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3083 ShouldNotReachHere(); |
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3084 } |
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3085 return false; // keep some compilers happy |
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|
3086 } |
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3087 |
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3088 HeapWord* G1CollectedHeap::top_at_mark_start(HeapRegion* hr, VerifyOption vo) { |
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3089 switch (vo) { |
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3090 case VerifyOption_G1UsePrevMarking: return hr->prev_top_at_mark_start(); |
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3091 case VerifyOption_G1UseNextMarking: return hr->next_top_at_mark_start(); |
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3092 case VerifyOption_G1UseMarkWord: return NULL; |
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3093 default: ShouldNotReachHere(); |
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3094 } |
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3095 return NULL; // keep some compilers happy |
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|
3096 } |
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|
3097 |
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3098 bool G1CollectedHeap::is_marked(oop obj, VerifyOption vo) { |
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3099 switch (vo) { |
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3100 case VerifyOption_G1UsePrevMarking: return isMarkedPrev(obj); |
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3101 case VerifyOption_G1UseNextMarking: return isMarkedNext(obj); |
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3102 case VerifyOption_G1UseMarkWord: return obj->is_gc_marked(); |
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3103 default: ShouldNotReachHere(); |
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3104 } |
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3105 return false; // keep some compilers happy |
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|
3106 } |
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|
3107 |
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3108 const char* G1CollectedHeap::top_at_mark_start_str(VerifyOption vo) { |
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3109 switch (vo) { |
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3110 case VerifyOption_G1UsePrevMarking: return "PTAMS"; |
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3111 case VerifyOption_G1UseNextMarking: return "NTAMS"; |
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3112 case VerifyOption_G1UseMarkWord: return "NONE"; |
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3113 default: ShouldNotReachHere(); |
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|
3114 } |
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|
3115 return NULL; // keep some compilers happy |
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|
3116 } |
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|
3117 |
17636
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|
3118 class VerifyRootsClosure: public OopClosure { |
12080 | 3119 private: |
3120 G1CollectedHeap* _g1h; | |
3121 VerifyOption _vo; | |
3122 bool _failures; | |
3123 public: | |
3124 // _vo == UsePrevMarking -> use "prev" marking information, | |
3125 // _vo == UseNextMarking -> use "next" marking information, | |
3126 // _vo == UseMarkWord -> use mark word from object header. | |
3127 VerifyRootsClosure(VerifyOption vo) : | |
3128 _g1h(G1CollectedHeap::heap()), | |
3129 _vo(vo), | |
3130 _failures(false) { } | |
3131 | |
3132 bool failures() { return _failures; } | |
3133 | |
3134 template <class T> void do_oop_nv(T* p) { | |
3135 T heap_oop = oopDesc::load_heap_oop(p); | |
3136 if (!oopDesc::is_null(heap_oop)) { | |
3137 oop obj = oopDesc::decode_heap_oop_not_null(heap_oop); | |
3138 if (_g1h->is_obj_dead_cond(obj, _vo)) { | |
3139 gclog_or_tty->print_cr("Root location "PTR_FORMAT" " | |
3140 "points to dead obj "PTR_FORMAT, p, (void*) obj); | |
3141 if (_vo == VerifyOption_G1UseMarkWord) { | |
3142 gclog_or_tty->print_cr(" Mark word: "PTR_FORMAT, (void*)(obj->mark())); | |
3143 } | |
3144 obj->print_on(gclog_or_tty); | |
3145 _failures = true; | |
3146 } | |
3147 } | |
3148 } | |
3149 | |
3150 void do_oop(oop* p) { do_oop_nv(p); } | |
3151 void do_oop(narrowOop* p) { do_oop_nv(p); } | |
3152 }; | |
3153 | |
17636
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|
3154 class G1VerifyCodeRootOopClosure: public OopClosure { |
12080 | 3155 G1CollectedHeap* _g1h; |
3156 OopClosure* _root_cl; | |
3157 nmethod* _nm; | |
3158 VerifyOption _vo; | |
3159 bool _failures; | |
3160 | |
3161 template <class T> void do_oop_work(T* p) { | |
3162 // First verify that this root is live | |
3163 _root_cl->do_oop(p); | |
3164 | |
3165 if (!G1VerifyHeapRegionCodeRoots) { | |
3166 // We're not verifying the code roots attached to heap region. | |
3167 return; | |
3168 } | |
3169 | |
3170 // Don't check the code roots during marking verification in a full GC | |
3171 if (_vo == VerifyOption_G1UseMarkWord) { | |
3172 return; | |
3173 } | |
3174 | |
3175 // Now verify that the current nmethod (which contains p) is | |
3176 // in the code root list of the heap region containing the | |
3177 // object referenced by p. | |
3178 | |
3179 T heap_oop = oopDesc::load_heap_oop(p); | |
3180 if (!oopDesc::is_null(heap_oop)) { | |
3181 oop obj = oopDesc::decode_heap_oop_not_null(heap_oop); | |
3182 | |
3183 // Now fetch the region containing the object | |
3184 HeapRegion* hr = _g1h->heap_region_containing(obj); | |
3185 HeapRegionRemSet* hrrs = hr->rem_set(); | |
3186 // Verify that the strong code root list for this region | |
3187 // contains the nmethod | |
3188 if (!hrrs->strong_code_roots_list_contains(_nm)) { | |
3189 gclog_or_tty->print_cr("Code root location "PTR_FORMAT" " | |
3190 "from nmethod "PTR_FORMAT" not in strong " | |
3191 "code roots for region ["PTR_FORMAT","PTR_FORMAT")", | |
3192 p, _nm, hr->bottom(), hr->end()); | |
3193 _failures = true; | |
3194 } | |
3195 } | |
3196 } | |
3197 | |
3198 public: | |
3199 G1VerifyCodeRootOopClosure(G1CollectedHeap* g1h, OopClosure* root_cl, VerifyOption vo): | |
3200 _g1h(g1h), _root_cl(root_cl), _vo(vo), _nm(NULL), _failures(false) {} | |
3201 | |
3202 void do_oop(oop* p) { do_oop_work(p); } | |
3203 void do_oop(narrowOop* p) { do_oop_work(p); } | |
3204 | |
3205 void set_nmethod(nmethod* nm) { _nm = nm; } | |
3206 bool failures() { return _failures; } | |
3207 }; | |
3208 | |
3209 class G1VerifyCodeRootBlobClosure: public CodeBlobClosure { | |
3210 G1VerifyCodeRootOopClosure* _oop_cl; | |
3211 | |
3212 public: | |
3213 G1VerifyCodeRootBlobClosure(G1VerifyCodeRootOopClosure* oop_cl): | |
3214 _oop_cl(oop_cl) {} | |
3215 | |
3216 void do_code_blob(CodeBlob* cb) { | |
3217 nmethod* nm = cb->as_nmethod_or_null(); | |
3218 if (nm != NULL) { | |
3219 _oop_cl->set_nmethod(nm); | |
3220 nm->oops_do(_oop_cl); | |
3221 } | |
3222 } | |
3223 }; | |
3224 | |
3225 class YoungRefCounterClosure : public OopClosure { | |
3226 G1CollectedHeap* _g1h; | |
3227 int _count; | |
3228 public: | |
3229 YoungRefCounterClosure(G1CollectedHeap* g1h) : _g1h(g1h), _count(0) {} | |
3230 void do_oop(oop* p) { if (_g1h->is_in_young(*p)) { _count++; } } | |
3231 void do_oop(narrowOop* p) { ShouldNotReachHere(); } | |
3232 | |
3233 int count() { return _count; } | |
3234 void reset_count() { _count = 0; }; | |
3235 }; | |
3236 | |
3237 class VerifyKlassClosure: public KlassClosure { | |
3238 YoungRefCounterClosure _young_ref_counter_closure; | |
3239 OopClosure *_oop_closure; | |
3240 public: | |
3241 VerifyKlassClosure(G1CollectedHeap* g1h, OopClosure* cl) : _young_ref_counter_closure(g1h), _oop_closure(cl) {} | |
3242 void do_klass(Klass* k) { | |
3243 k->oops_do(_oop_closure); | |
3244 | |
3245 _young_ref_counter_closure.reset_count(); | |
3246 k->oops_do(&_young_ref_counter_closure); | |
3247 if (_young_ref_counter_closure.count() > 0) { | |
3248 guarantee(k->has_modified_oops(), err_msg("Klass %p, has young refs but is not dirty.", k)); | |
3249 } | |
3250 } | |
3251 }; | |
3252 | |
342 | 3253 class VerifyLivenessOopClosure: public OopClosure { |
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3254 G1CollectedHeap* _g1h; |
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3255 VerifyOption _vo; |
342 | 3256 public: |
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|
3257 VerifyLivenessOopClosure(G1CollectedHeap* g1h, VerifyOption vo): |
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3258 _g1h(g1h), _vo(vo) |
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|
3259 { } |
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|
3260 void do_oop(narrowOop *p) { do_oop_work(p); } |
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3261 void do_oop( oop *p) { do_oop_work(p); } |
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|
3262 |
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|
3263 template <class T> void do_oop_work(T *p) { |
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|
3264 oop obj = oopDesc::load_decode_heap_oop(p); |
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|
3265 guarantee(obj == NULL || !_g1h->is_obj_dead_cond(obj, _vo), |
845
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|
3266 "Dead object referenced by a not dead object"); |
342 | 3267 } |
3268 }; | |
3269 | |
3270 class VerifyObjsInRegionClosure: public ObjectClosure { | |
811 | 3271 private: |
342 | 3272 G1CollectedHeap* _g1h; |
3273 size_t _live_bytes; | |
3274 HeapRegion *_hr; | |
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|
3275 VerifyOption _vo; |
342 | 3276 public: |
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|
3277 // _vo == UsePrevMarking -> use "prev" marking information, |
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|
3278 // _vo == UseNextMarking -> use "next" marking information, |
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|
3279 // _vo == UseMarkWord -> use mark word from object header. |
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|
3280 VerifyObjsInRegionClosure(HeapRegion *hr, VerifyOption vo) |
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3281 : _live_bytes(0), _hr(hr), _vo(vo) { |
342 | 3282 _g1h = G1CollectedHeap::heap(); |
3283 } | |
3284 void do_object(oop o) { | |
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|
3285 VerifyLivenessOopClosure isLive(_g1h, _vo); |
342 | 3286 assert(o != NULL, "Huh?"); |
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|
3287 if (!_g1h->is_obj_dead_cond(o, _vo)) { |
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3288 // If the object is alive according to the mark word, |
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|
3289 // then verify that the marking information agrees. |
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|
3290 // Note we can't verify the contra-positive of the |
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
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|
3291 // above: if the object is dead (according to the mark |
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7004681: G1: Extend marking verification to Full GCs
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|
3292 // word), it may not be marked, or may have been marked |
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7004681: G1: Extend marking verification to Full GCs
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|
3293 // but has since became dead, or may have been allocated |
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7004681: G1: Extend marking verification to Full GCs
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|
3294 // since the last marking. |
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|
3295 if (_vo == VerifyOption_G1UseMarkWord) { |
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7004681: G1: Extend marking verification to Full GCs
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|
3296 guarantee(!_g1h->is_obj_dead(o), "mark word and concurrent mark mismatch"); |
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7004681: G1: Extend marking verification to Full GCs
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|
3297 } |
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|
3298 |
6725
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|
3299 o->oop_iterate_no_header(&isLive); |
1389
5dbd9300cf9c
6943926: G1: Integer overflow during heap region verification
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|
3300 if (!_hr->obj_allocated_since_prev_marking(o)) { |
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|
3301 size_t obj_size = o->size(); // Make sure we don't overflow |
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3302 _live_bytes += (obj_size * HeapWordSize); |
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|
3303 } |
342 | 3304 } |
3305 } | |
3306 size_t live_bytes() { return _live_bytes; } | |
3307 }; | |
3308 | |
3309 class PrintObjsInRegionClosure : public ObjectClosure { | |
3310 HeapRegion *_hr; | |
3311 G1CollectedHeap *_g1; | |
3312 public: | |
3313 PrintObjsInRegionClosure(HeapRegion *hr) : _hr(hr) { | |
3314 _g1 = G1CollectedHeap::heap(); | |
3315 }; | |
3316 | |
3317 void do_object(oop o) { | |
3318 if (o != NULL) { | |
3319 HeapWord *start = (HeapWord *) o; | |
3320 size_t word_sz = o->size(); | |
3321 gclog_or_tty->print("\nPrinting obj "PTR_FORMAT" of size " SIZE_FORMAT | |
3322 " isMarkedPrev %d isMarkedNext %d isAllocSince %d\n", | |
3323 (void*) o, word_sz, | |
3324 _g1->isMarkedPrev(o), | |
3325 _g1->isMarkedNext(o), | |
3326 _hr->obj_allocated_since_prev_marking(o)); | |
3327 HeapWord *end = start + word_sz; | |
3328 HeapWord *cur; | |
3329 int *val; | |
3330 for (cur = start; cur < end; cur++) { | |
3331 val = (int *) cur; | |
3332 gclog_or_tty->print("\t "PTR_FORMAT":"PTR_FORMAT"\n", val, *val); | |
3333 } | |
3334 } | |
3335 } | |
3336 }; | |
3337 | |
3338 class VerifyRegionClosure: public HeapRegionClosure { | |
811 | 3339 private: |
6254
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7114678: G1: various small fixes, code cleanup, and refactoring
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3340 bool _par; |
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|
3341 VerifyOption _vo; |
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3342 bool _failures; |
811 | 3343 public: |
3772
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3344 // _vo == UsePrevMarking -> use "prev" marking information, |
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3345 // _vo == UseNextMarking -> use "next" marking information, |
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|
3346 // _vo == UseMarkWord -> use mark word from object header. |
6008 | 3347 VerifyRegionClosure(bool par, VerifyOption vo) |
3348 : _par(par), | |
3772
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|
3349 _vo(vo), |
1020
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|
3350 _failures(false) {} |
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|
3351 |
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|
3352 bool failures() { |
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|
3353 return _failures; |
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|
3354 } |
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|
3355 |
342 | 3356 bool doHeapRegion(HeapRegion* r) { |
637
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|
3357 if (!r->continuesHumongous()) { |
1020
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|
3358 bool failures = false; |
6008 | 3359 r->verify(_vo, &failures); |
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|
3360 if (failures) { |
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|
3361 _failures = true; |
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|
3362 } else { |
3772
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|
3363 VerifyObjsInRegionClosure not_dead_yet_cl(r, _vo); |
1020
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|
3364 r->object_iterate(¬_dead_yet_cl); |
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|
3365 if (_vo != VerifyOption_G1UseNextMarking) { |
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|
3366 if (r->max_live_bytes() < not_dead_yet_cl.live_bytes()) { |
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|
3367 gclog_or_tty->print_cr("["PTR_FORMAT","PTR_FORMAT"] " |
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|
3368 "max_live_bytes "SIZE_FORMAT" " |
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diff
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|
3369 "< calculated "SIZE_FORMAT, |
2ace1c4ee8da
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diff
changeset
|
3370 r->bottom(), r->end(), |
2ace1c4ee8da
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|
3371 r->max_live_bytes(), |
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|
3372 not_dead_yet_cl.live_bytes()); |
4787
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diff
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|
3373 _failures = true; |
2ace1c4ee8da
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diff
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|
3374 } |
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|
3375 } else { |
2ace1c4ee8da
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diff
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|
3376 // When vo == UseNextMarking we cannot currently do a sanity |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
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diff
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|
3377 // check on the live bytes as the calculation has not been |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
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diff
changeset
|
3378 // finalized yet. |
1020
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|
3379 } |
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|
3380 } |
342 | 3381 } |
1020
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diff
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|
3382 return false; // stop the region iteration if we hit a failure |
342 | 3383 } |
3384 }; | |
3385 | |
12080 | 3386 // This is the task used for parallel verification of the heap regions |
390 | 3387 |
3388 class G1ParVerifyTask: public AbstractGangTask { | |
3389 private: | |
3390 G1CollectedHeap* _g1h; | |
3772
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7004681: G1: Extend marking verification to Full GCs
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|
3391 VerifyOption _vo; |
6747fd0512e0
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|
3392 bool _failures; |
390 | 3393 |
3394 public: | |
3772
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changeset
|
3395 // _vo == UsePrevMarking -> use "prev" marking information, |
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|
3396 // _vo == UseNextMarking -> use "next" marking information, |
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changeset
|
3397 // _vo == UseMarkWord -> use mark word from object header. |
6008 | 3398 G1ParVerifyTask(G1CollectedHeap* g1h, VerifyOption vo) : |
390 | 3399 AbstractGangTask("Parallel verify task"), |
845
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6700789: G1: Enable use of compressed oops with G1 heaps
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diff
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|
3400 _g1h(g1h), |
3772
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3766
diff
changeset
|
3401 _vo(vo), |
1020
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1019
diff
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|
3402 _failures(false) { } |
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|
3403 |
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6882730: G1: parallel heap verification messes up region dump
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1019
diff
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|
3404 bool failures() { |
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
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parents:
1019
diff
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|
3405 return _failures; |
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parents:
1019
diff
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|
3406 } |
390 | 3407 |
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
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4711
diff
changeset
|
3408 void work(uint worker_id) { |
637
25e146966e7c
6817419: G1: Enable extensive verification for humongous regions
iveresov
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636
diff
changeset
|
3409 HandleMark hm; |
6008 | 3410 VerifyRegionClosure blk(true, _vo); |
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
3411 _g1h->heap_region_par_iterate_chunked(&blk, worker_id, |
4095
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6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
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4090
diff
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|
3412 _g1h->workers()->active_workers(), |
390 | 3413 HeapRegion::ParVerifyClaimValue); |
1020
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6882730: G1: parallel heap verification messes up region dump
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1019
diff
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|
3414 if (blk.failures()) { |
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
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parents:
1019
diff
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|
3415 _failures = true; |
ff2402f6a50b
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1019
diff
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|
3416 } |
390 | 3417 } |
3418 }; | |
3419 | |
12080 | 3420 void G1CollectedHeap::verify(bool silent, VerifyOption vo) { |
8855
24ef5fb05e0f
8010463: G1: Crashes with -UseTLAB and heap verification
johnc
parents:
8853
diff
changeset
|
3421 if (SafepointSynchronize::is_at_safepoint()) { |
12080 | 3422 assert(Thread::current()->is_VM_thread(), |
3423 "Expected to be executed serially by the VM thread at this point"); | |
3424 | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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|
3425 if (!silent) { gclog_or_tty->print("Roots "); } |
3772
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
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parents:
3766
diff
changeset
|
3426 VerifyRootsClosure rootsCl(vo); |
12080 | 3427 G1VerifyCodeRootOopClosure codeRootsCl(this, &rootsCl, vo); |
3428 G1VerifyCodeRootBlobClosure blobsCl(&codeRootsCl); | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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diff
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|
3429 VerifyKlassClosure klassCl(this, &rootsCl); |
3772
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diff
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|
3430 |
3293
1f4413413144
7039089: G1: changeset for 7037276 broke heap verification, and related cleanups
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3289
diff
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|
3431 // We apply the relevant closures to all the oops in the |
1f4413413144
7039089: G1: changeset for 7037276 broke heap verification, and related cleanups
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diff
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|
3432 // system dictionary, the string table and the code cache. |
4910
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
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diff
changeset
|
3433 const int so = SO_AllClasses | SO_Strings | SO_CodeCache; |
3772
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|
3434 |
6725
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|
3435 // Need cleared claim bits for the strong roots processing |
da91efe96a93
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|
3436 ClassLoaderDataGraph::clear_claimed_marks(); |
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|
3437 |
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diff
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|
3438 process_strong_roots(true, // activate StrongRootsScope |
6725
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|
3439 false, // we set "is scavenging" to false, |
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|
3440 // so we don't reset the dirty cards. |
4910
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7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
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|
3441 ScanningOption(so), // roots scanning options |
342 | 3442 &rootsCl, |
989
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6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
890
diff
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|
3443 &blobsCl, |
6725
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|
3444 &klassCl |
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|
3445 ); |
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|
3446 |
12080 | 3447 bool failures = rootsCl.failures() || codeRootsCl.failures(); |
3772
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|
3448 |
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|
3449 if (vo != VerifyOption_G1UseMarkWord) { |
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|
3450 // If we're verifying during a full GC then the region sets |
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|
3451 // will have been torn down at the start of the GC. Therefore |
6747fd0512e0
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diff
changeset
|
3452 // verifying the region sets will fail. So we only verify |
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3766
diff
changeset
|
3453 // the region sets when not in a full GC. |
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3766
diff
changeset
|
3454 if (!silent) { gclog_or_tty->print("HeapRegionSets "); } |
6747fd0512e0
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3766
diff
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|
3455 verify_region_sets(); |
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3766
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|
3456 } |
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3766
diff
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|
3457 |
2152 | 3458 if (!silent) { gclog_or_tty->print("HeapRegions "); } |
390 | 3459 if (GCParallelVerificationEnabled && ParallelGCThreads > 1) { |
3460 assert(check_heap_region_claim_values(HeapRegion::InitialClaimValue), | |
3461 "sanity check"); | |
3462 | |
6008 | 3463 G1ParVerifyTask task(this, vo); |
4095
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|
3464 assert(UseDynamicNumberOfGCThreads || |
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|
3465 workers()->active_workers() == workers()->total_workers(), |
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|
3466 "If not dynamic should be using all the workers"); |
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diff
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|
3467 int n_workers = workers()->active_workers(); |
390 | 3468 set_par_threads(n_workers); |
3469 workers()->run_task(&task); | |
3470 set_par_threads(0); | |
1020
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|
3471 if (task.failures()) { |
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|
3472 failures = true; |
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|
3473 } |
390 | 3474 |
4095
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|
3475 // Checks that the expected amount of parallel work was done. |
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|
3476 // The implication is that n_workers is > 0. |
390 | 3477 assert(check_heap_region_claim_values(HeapRegion::ParVerifyClaimValue), |
3478 "sanity check"); | |
3479 | |
3480 reset_heap_region_claim_values(); | |
3481 | |
3482 assert(check_heap_region_claim_values(HeapRegion::InitialClaimValue), | |
3483 "sanity check"); | |
3484 } else { | |
6008 | 3485 VerifyRegionClosure blk(false, vo); |
3766 | 3486 heap_region_iterate(&blk); |
1020
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|
3487 if (blk.failures()) { |
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|
3488 failures = true; |
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|
3489 } |
390 | 3490 } |
2152 | 3491 if (!silent) gclog_or_tty->print("RemSet "); |
342 | 3492 rem_set()->verify(); |
1020
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|
3493 |
17764 | 3494 if (G1StringDedup::is_enabled()) { |
3495 if (!silent) gclog_or_tty->print("StrDedup "); | |
3496 G1StringDedup::verify(); | |
3497 } | |
3498 | |
1020
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|
3499 if (failures) { |
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|
3500 gclog_or_tty->print_cr("Heap:"); |
4073
53074c2c4600
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|
3501 // It helps to have the per-region information in the output to |
53074c2c4600
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|
3502 // help us track down what went wrong. This is why we call |
53074c2c4600
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|
3503 // print_extended_on() instead of print_on(). |
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|
3504 print_extended_on(gclog_or_tty); |
17937
78bbf4d43a14
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|
3505 gclog_or_tty->cr(); |
1547
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|
3506 #ifndef PRODUCT |
1044 | 3507 if (VerifyDuringGC && G1VerifyDuringGCPrintReachable) { |
1388 | 3508 concurrent_mark()->print_reachable("at-verification-failure", |
3772
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7004681: G1: Extend marking verification to Full GCs
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|
3509 vo, false /* all */); |
1020
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|
3510 } |
1547
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|
3511 #endif |
1020
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|
3512 gclog_or_tty->flush(); |
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|
3513 } |
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|
3514 guarantee(!failures, "there should not have been any failures"); |
342 | 3515 } else { |
17764 | 3516 if (!silent) { |
3517 gclog_or_tty->print("(SKIPPING Roots, HeapRegionSets, HeapRegions, RemSet"); | |
3518 if (G1StringDedup::is_enabled()) { | |
3519 gclog_or_tty->print(", StrDedup"); | |
3520 } | |
3521 gclog_or_tty->print(") "); | |
3522 } | |
342 | 3523 } |
3524 } | |
3525 | |
12080 | 3526 void G1CollectedHeap::verify(bool silent) { |
3527 verify(silent, VerifyOption_G1UsePrevMarking); | |
3528 } | |
3529 | |
3530 double G1CollectedHeap::verify(bool guard, const char* msg) { | |
3531 double verify_time_ms = 0.0; | |
3532 | |
3533 if (guard && total_collections() >= VerifyGCStartAt) { | |
3534 double verify_start = os::elapsedTime(); | |
3535 HandleMark hm; // Discard invalid handles created during verification | |
3536 prepare_for_verify(); | |
3537 Universe::verify(VerifyOption_G1UsePrevMarking, msg); | |
3538 verify_time_ms = (os::elapsedTime() - verify_start) * 1000; | |
3539 } | |
3540 | |
3541 return verify_time_ms; | |
3542 } | |
3543 | |
3544 void G1CollectedHeap::verify_before_gc() { | |
3545 double verify_time_ms = verify(VerifyBeforeGC, " VerifyBeforeGC:"); | |
3546 g1_policy()->phase_times()->record_verify_before_time_ms(verify_time_ms); | |
3547 } | |
3548 | |
3549 void G1CollectedHeap::verify_after_gc() { | |
3550 double verify_time_ms = verify(VerifyAfterGC, " VerifyAfterGC:"); | |
3551 g1_policy()->phase_times()->record_verify_after_time_ms(verify_time_ms); | |
3552 } | |
3553 | |
342 | 3554 class PrintRegionClosure: public HeapRegionClosure { |
3555 outputStream* _st; | |
3556 public: | |
3557 PrintRegionClosure(outputStream* st) : _st(st) {} | |
3558 bool doHeapRegion(HeapRegion* r) { | |
3559 r->print_on(_st); | |
3560 return false; | |
3561 } | |
3562 }; | |
3563 | |
17833
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|
3564 bool G1CollectedHeap::is_obj_dead_cond(const oop obj, |
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|
3565 const HeapRegion* hr, |
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|
3566 const VerifyOption vo) const { |
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|
3567 switch (vo) { |
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|
3568 case VerifyOption_G1UsePrevMarking: return is_obj_dead(obj, hr); |
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|
3569 case VerifyOption_G1UseNextMarking: return is_obj_ill(obj, hr); |
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|
3570 case VerifyOption_G1UseMarkWord: return !obj->is_gc_marked(); |
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|
3571 default: ShouldNotReachHere(); |
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diff
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|
3572 } |
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|
3573 return false; // keep some compilers happy |
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diff
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|
3574 } |
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|
3575 |
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|
3576 bool G1CollectedHeap::is_obj_dead_cond(const oop obj, |
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|
3577 const VerifyOption vo) const { |
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|
3578 switch (vo) { |
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|
3579 case VerifyOption_G1UsePrevMarking: return is_obj_dead(obj); |
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|
3580 case VerifyOption_G1UseNextMarking: return is_obj_ill(obj); |
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|
3581 case VerifyOption_G1UseMarkWord: return !obj->is_gc_marked(); |
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|
3582 default: ShouldNotReachHere(); |
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|
3583 } |
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|
3584 return false; // keep some compilers happy |
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|
3585 } |
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|
3586 |
342 | 3587 void G1CollectedHeap::print_on(outputStream* st) const { |
838
0316eac49d5a
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|
3588 st->print(" %-20s", "garbage-first heap"); |
0316eac49d5a
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|
3589 st->print(" total " SIZE_FORMAT "K, used " SIZE_FORMAT "K", |
846
42d84bbbecf4
6859911: G1: assert(Heap_lock->owner() = NULL, "Should be owned on this thread's behalf")
tonyp
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changeset
|
3590 capacity()/K, used_unlocked()/K); |
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
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diff
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|
3591 st->print(" [" INTPTR_FORMAT ", " INTPTR_FORMAT ", " INTPTR_FORMAT ")", |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
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|
3592 _g1_storage.low_boundary(), |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
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811
diff
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|
3593 _g1_storage.high(), |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
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|
3594 _g1_storage.high_boundary()); |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
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|
3595 st->cr(); |
3986
65a8ff39a6da
7095194: G1: HeapRegion::GrainBytes, GrainWords, and CardsPerRegion should be size_t
johnc
parents:
3983
diff
changeset
|
3596 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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|
3597 uint young_regions = _young_list->length(); |
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
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6008
diff
changeset
|
3598 st->print("%u young (" SIZE_FORMAT "K), ", young_regions, |
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7157073: G1: type change size_t -> uint for region counts / indexes
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|
3599 (size_t) young_regions * HeapRegion::GrainBytes / K); |
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|
3600 uint survivor_regions = g1_policy()->recorded_survivor_regions(); |
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|
3601 st->print("%u survivors (" SIZE_FORMAT "K)", survivor_regions, |
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changeset
|
3602 (size_t) survivor_regions * HeapRegion::GrainBytes / K); |
838
0316eac49d5a
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diff
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|
3603 st->cr(); |
6863
04155d9c8c76
8000358: G1: metaspace information not printed in PrintHeapAtGC output nor in hs_err file
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parents:
6819
diff
changeset
|
3604 MetaspaceAux::print_on(st); |
4073
53074c2c4600
7099849: G1: include heap region information in hs_err files
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4072
diff
changeset
|
3605 } |
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7099849: G1: include heap region information in hs_err files
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|
3606 |
53074c2c4600
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|
3607 void G1CollectedHeap::print_extended_on(outputStream* st) const { |
53074c2c4600
7099849: G1: include heap region information in hs_err files
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parents:
4072
diff
changeset
|
3608 print_on(st); |
53074c2c4600
7099849: G1: include heap region information in hs_err files
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changeset
|
3609 |
53074c2c4600
7099849: G1: include heap region information in hs_err files
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|
3610 // Print the per-region information. |
53074c2c4600
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|
3611 st->cr(); |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
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diff
changeset
|
3612 st->print_cr("Heap Regions: (Y=young(eden), SU=young(survivor), " |
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|
3613 "HS=humongous(starts), HC=humongous(continues), " |
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
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|
3614 "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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6008
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|
3615 "PTAMS=previous top-at-mark-start, " |
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7157073: G1: type change size_t -> uint for region counts / indexes
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diff
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|
3616 "NTAMS=next top-at-mark-start)"); |
342 | 3617 PrintRegionClosure blk(st); |
3766 | 3618 heap_region_iterate(&blk); |
342 | 3619 } |
3620 | |
9076
7b835924c31c
8011872: Include Bit Map addresses in the hs_err files
stefank
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8855
diff
changeset
|
3621 void G1CollectedHeap::print_on_error(outputStream* st) const { |
7b835924c31c
8011872: Include Bit Map addresses in the hs_err files
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8855
diff
changeset
|
3622 this->CollectedHeap::print_on_error(st); |
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8011872: Include Bit Map addresses in the hs_err files
stefank
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8855
diff
changeset
|
3623 |
7b835924c31c
8011872: Include Bit Map addresses in the hs_err files
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8855
diff
changeset
|
3624 if (_cm != NULL) { |
7b835924c31c
8011872: Include Bit Map addresses in the hs_err files
stefank
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8855
diff
changeset
|
3625 st->cr(); |
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8011872: Include Bit Map addresses in the hs_err files
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8855
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changeset
|
3626 _cm->print_on_error(st); |
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8011872: Include Bit Map addresses in the hs_err files
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8855
diff
changeset
|
3627 } |
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diff
changeset
|
3628 } |
7b835924c31c
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|
3629 |
342 | 3630 void G1CollectedHeap::print_gc_threads_on(outputStream* st) const { |
1833
8b10f48633dc
6984287: Regularize how GC parallel workers are specified.
jmasa
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1755
diff
changeset
|
3631 if (G1CollectedHeap::use_parallel_gc_threads()) { |
1019 | 3632 workers()->print_worker_threads_on(st); |
3633 } | |
3634 _cmThread->print_on(st); | |
342 | 3635 st->cr(); |
1019 | 3636 _cm->print_worker_threads_on(st); |
3637 _cg1r->print_worker_threads_on(st); | |
17764 | 3638 if (G1StringDedup::is_enabled()) { |
3639 G1StringDedup::print_worker_threads_on(st); | |
3640 } | |
342 | 3641 } |
3642 | |
3643 void G1CollectedHeap::gc_threads_do(ThreadClosure* tc) const { | |
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jmasa
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|
3644 if (G1CollectedHeap::use_parallel_gc_threads()) { |
342 | 3645 workers()->threads_do(tc); |
3646 } | |
3647 tc->do_thread(_cmThread); | |
794 | 3648 _cg1r->threads_do(tc); |
17764 | 3649 if (G1StringDedup::is_enabled()) { |
3650 G1StringDedup::threads_do(tc); | |
3651 } | |
342 | 3652 } |
3653 | |
3654 void G1CollectedHeap::print_tracing_info() const { | |
3655 // We'll overload this to mean "trace GC pause statistics." | |
3656 if (TraceGen0Time || TraceGen1Time) { | |
3657 // The "G1CollectorPolicy" is keeping track of these stats, so delegate | |
3658 // to that. | |
3659 g1_policy()->print_tracing_info(); | |
3660 } | |
751 | 3661 if (G1SummarizeRSetStats) { |
342 | 3662 g1_rem_set()->print_summary_info(); |
3663 } | |
1282 | 3664 if (G1SummarizeConcMark) { |
342 | 3665 concurrent_mark()->print_summary_info(); |
3666 } | |
3667 g1_policy()->print_yg_surv_rate_info(); | |
3668 SpecializationStats::print(); | |
3669 } | |
3670 | |
3777
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
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3774
diff
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|
3671 #ifndef PRODUCT |
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7046182: G1: remove unnecessary iterations over the collection set
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3774
diff
changeset
|
3672 // Helpful for debugging RSet issues. |
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tonyp
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3774
diff
changeset
|
3673 |
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|
3674 class PrintRSetsClosure : public HeapRegionClosure { |
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7046182: G1: remove unnecessary iterations over the collection set
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3774
diff
changeset
|
3675 private: |
e8b0b0392037
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3774
diff
changeset
|
3676 const char* _msg; |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
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3774
diff
changeset
|
3677 size_t _occupied_sum; |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
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3774
diff
changeset
|
3678 |
e8b0b0392037
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3774
diff
changeset
|
3679 public: |
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diff
changeset
|
3680 bool doHeapRegion(HeapRegion* r) { |
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7046182: G1: remove unnecessary iterations over the collection set
tonyp
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3774
diff
changeset
|
3681 HeapRegionRemSet* hrrs = r->rem_set(); |
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tonyp
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3774
diff
changeset
|
3682 size_t occupied = hrrs->occupied(); |
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3774
diff
changeset
|
3683 _occupied_sum += occupied; |
e8b0b0392037
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3774
diff
changeset
|
3684 |
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diff
changeset
|
3685 gclog_or_tty->print_cr("Printing RSet for region "HR_FORMAT, |
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7046182: G1: remove unnecessary iterations over the collection set
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diff
changeset
|
3686 HR_FORMAT_PARAMS(r)); |
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7046182: G1: remove unnecessary iterations over the collection set
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parents:
3774
diff
changeset
|
3687 if (occupied == 0) { |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
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parents:
3774
diff
changeset
|
3688 gclog_or_tty->print_cr(" RSet is empty"); |
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7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3689 } else { |
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7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3690 hrrs->print(); |
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7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3691 } |
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7046182: G1: remove unnecessary iterations over the collection set
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parents:
3774
diff
changeset
|
3692 gclog_or_tty->print_cr("----------"); |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
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parents:
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diff
changeset
|
3693 return false; |
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tonyp
parents:
3774
diff
changeset
|
3694 } |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
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diff
changeset
|
3695 |
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7046182: G1: remove unnecessary iterations over the collection set
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diff
changeset
|
3696 PrintRSetsClosure(const char* msg) : _msg(msg), _occupied_sum(0) { |
e8b0b0392037
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tonyp
parents:
3774
diff
changeset
|
3697 gclog_or_tty->cr(); |
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parents:
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diff
changeset
|
3698 gclog_or_tty->print_cr("========================================"); |
17937
78bbf4d43a14
8037816: Fix for 8036122 breaks build with Xcode5/clang
drchase
parents:
17935
diff
changeset
|
3699 gclog_or_tty->print_cr("%s", msg); |
3777
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3700 gclog_or_tty->cr(); |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
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diff
changeset
|
3701 } |
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7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3702 |
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7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3703 ~PrintRSetsClosure() { |
e8b0b0392037
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parents:
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diff
changeset
|
3704 gclog_or_tty->print_cr("Occupied Sum: "SIZE_FORMAT, _occupied_sum); |
e8b0b0392037
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parents:
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|
3705 gclog_or_tty->print_cr("========================================"); |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
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diff
changeset
|
3706 gclog_or_tty->cr(); |
e8b0b0392037
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tonyp
parents:
3774
diff
changeset
|
3707 } |
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7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
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diff
changeset
|
3708 }; |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
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diff
changeset
|
3709 |
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7046182: G1: remove unnecessary iterations over the collection set
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parents:
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changeset
|
3710 void G1CollectedHeap::print_cset_rsets() { |
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parents:
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|
3711 PrintRSetsClosure cl("Printing CSet RSets"); |
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tonyp
parents:
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diff
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|
3712 collection_set_iterate(&cl); |
e8b0b0392037
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tonyp
parents:
3774
diff
changeset
|
3713 } |
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7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
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diff
changeset
|
3714 |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
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parents:
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diff
changeset
|
3715 void G1CollectedHeap::print_all_rsets() { |
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parents:
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|
3716 PrintRSetsClosure cl("Printing All RSets");; |
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parents:
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diff
changeset
|
3717 heap_region_iterate(&cl); |
e8b0b0392037
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parents:
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diff
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|
3718 } |
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parents:
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changeset
|
3719 #endif // PRODUCT |
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|
3720 |
342 | 3721 G1CollectedHeap* G1CollectedHeap::heap() { |
3722 assert(_sh->kind() == CollectedHeap::G1CollectedHeap, | |
3723 "not a garbage-first heap"); | |
3724 return _g1h; | |
3725 } | |
3726 | |
3727 void G1CollectedHeap::gc_prologue(bool full /* Ignored */) { | |
1245
6484c4ee11cb
6904516: More object array barrier fixes, following up on 6906727
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parents:
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diff
changeset
|
3728 // always_do_update_barrier = false; |
342 | 3729 assert(InlineCacheBuffer::is_empty(), "should have cleaned up ICBuffer"); |
3730 // Fill TLAB's and such | |
17727 | 3731 accumulate_statistics_all_tlabs(); |
342 | 3732 ensure_parsability(true); |
12339
c319b188c7b2
8014078: G1: improve remembered set summary information by providing per region type information
tschatzl
parents:
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diff
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|
3733 |
c319b188c7b2
8014078: G1: improve remembered set summary information by providing per region type information
tschatzl
parents:
12305
diff
changeset
|
3734 if (G1SummarizeRSetStats && (G1SummarizeRSetStatsPeriod > 0) && |
c319b188c7b2
8014078: G1: improve remembered set summary information by providing per region type information
tschatzl
parents:
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diff
changeset
|
3735 (total_collections() % G1SummarizeRSetStatsPeriod == 0)) { |
c319b188c7b2
8014078: G1: improve remembered set summary information by providing per region type information
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parents:
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diff
changeset
|
3736 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
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parents:
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diff
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|
3737 } |
342 | 3738 } |
3739 | |
3740 void G1CollectedHeap::gc_epilogue(bool full /* Ignored */) { | |
10372
e72f7eecc96d
8013895: G1: G1SummarizeRSetStats output on Linux needs improvemen
tschatzl
parents:
10327
diff
changeset
|
3741 |
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8013895: G1: G1SummarizeRSetStats output on Linux needs improvemen
tschatzl
parents:
10327
diff
changeset
|
3742 if (G1SummarizeRSetStats && |
e72f7eecc96d
8013895: G1: G1SummarizeRSetStats output on Linux needs improvemen
tschatzl
parents:
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diff
changeset
|
3743 (G1SummarizeRSetStatsPeriod > 0) && |
e72f7eecc96d
8013895: G1: G1SummarizeRSetStats output on Linux needs improvemen
tschatzl
parents:
10327
diff
changeset
|
3744 // 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
|
3745 ((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
|
3746 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
|
3747 } |
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8013895: G1: G1SummarizeRSetStats output on Linux needs improvemen
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parents:
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diff
changeset
|
3748 |
342 | 3749 // FIXME: what is this about? |
3750 // I'm ignoring the "fill_newgen()" call if "alloc_event_enabled" | |
3751 // is set. | |
3752 COMPILER2_PRESENT(assert(DerivedPointerTable::is_empty(), | |
3753 "derived pointer present")); | |
1245
6484c4ee11cb
6904516: More object array barrier fixes, following up on 6906727
ysr
parents:
1166
diff
changeset
|
3754 // always_do_update_barrier = true; |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3755 |
17727 | 3756 resize_all_tlabs(); |
3757 | |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3758 // We have just completed a GC. Update the soft reference |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3759 // policy with the new heap occupancy |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3760 Universe::update_heap_info_at_gc(); |
342 | 3761 } |
3762 | |
1973 | 3763 HeapWord* G1CollectedHeap::do_collection_pause(size_t word_size, |
3764 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
|
3765 bool* succeeded, |
f7d3b4387a16
8022872: G1: Use correct GC cause for young GC triggered by humongous allocations
brutisso
parents:
12082
diff
changeset
|
3766 GCCause::Cause gc_cause) { |
1973 | 3767 assert_heap_not_locked_and_not_at_safepoint(); |
342 | 3768 g1_policy()->record_stop_world_start(); |
1973 | 3769 VM_G1IncCollectionPause op(gc_count_before, |
3770 word_size, | |
3771 false, /* should_initiate_conc_mark */ | |
3772 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
|
3773 gc_cause); |
1973 | 3774 VMThread::execute(&op); |
3775 | |
3776 HeapWord* result = op.result(); | |
3777 bool ret_succeeded = op.prologue_succeeded() && op.pause_succeeded(); | |
3778 assert(result == NULL || ret_succeeded, | |
3779 "the result should be NULL if the VM did not succeed"); | |
3780 *succeeded = ret_succeeded; | |
3781 | |
3782 assert_heap_not_locked(); | |
3783 return result; | |
342 | 3784 } |
3785 | |
3786 void | |
3787 G1CollectedHeap::doConcurrentMark() { | |
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3788 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
|
3789 if (!_cmThread->in_progress()) { |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3790 _cmThread->set_started(); |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3791 CGC_lock->notify(); |
342 | 3792 } |
3793 } | |
3794 | |
3795 size_t G1CollectedHeap::pending_card_num() { | |
3796 size_t extra_cards = 0; | |
3797 JavaThread *curr = Threads::first(); | |
3798 while (curr != NULL) { | |
3799 DirtyCardQueue& dcq = curr->dirty_card_queue(); | |
3800 extra_cards += dcq.size(); | |
3801 curr = curr->next(); | |
3802 } | |
3803 DirtyCardQueueSet& dcqs = JavaThread::dirty_card_queue_set(); | |
3804 size_t buffer_size = dcqs.buffer_size(); | |
3805 size_t buffer_num = dcqs.completed_buffers_num(); | |
6611 | 3806 |
3807 // PtrQueueSet::buffer_size() and PtrQueue:size() return sizes | |
3808 // in bytes - not the number of 'entries'. We need to convert | |
3809 // into a number of cards. | |
3810 return (buffer_size * buffer_num + extra_cards) / oopSize; | |
342 | 3811 } |
3812 | |
3813 size_t G1CollectedHeap::cards_scanned() { | |
1861 | 3814 return g1_rem_set()->cardsScanned(); |
342 | 3815 } |
3816 | |
3817 void | |
3818 G1CollectedHeap::setup_surviving_young_words() { | |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3819 assert(_surviving_young_words == NULL, "pre-condition"); |
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3820 uint array_length = g1_policy()->young_cset_region_length(); |
6197 | 3821 _surviving_young_words = NEW_C_HEAP_ARRAY(size_t, (size_t) array_length, mtGC); |
342 | 3822 if (_surviving_young_words == NULL) { |
10161
746b070f5022
8011661: Insufficient memory message says "malloc" when sometimes it should say "mmap"
ccheung
parents:
10099
diff
changeset
|
3823 vm_exit_out_of_memory(sizeof(size_t) * array_length, OOM_MALLOC_ERROR, |
342 | 3824 "Not enough space for young surv words summary."); |
3825 } | |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3826 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
|
3827 #ifdef ASSERT |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3828 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
|
3829 assert( _surviving_young_words[i] == 0, "memset above" ); |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3830 } |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3831 #endif // !ASSERT |
342 | 3832 } |
3833 | |
3834 void | |
3835 G1CollectedHeap::update_surviving_young_words(size_t* surv_young_words) { | |
3836 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
|
3837 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
|
3838 for (uint i = 0; i < array_length; ++i) { |
342 | 3839 _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
|
3840 } |
342 | 3841 } |
3842 | |
3843 void | |
3844 G1CollectedHeap::cleanup_surviving_young_words() { | |
3845 guarantee( _surviving_young_words != NULL, "pre-condition" ); | |
6197 | 3846 FREE_C_HEAP_ARRAY(size_t, _surviving_young_words, mtGC); |
342 | 3847 _surviving_young_words = NULL; |
3848 } | |
3849 | |
3777
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3850 #ifdef ASSERT |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3851 class VerifyCSetClosure: public HeapRegionClosure { |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3852 public: |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3853 bool doHeapRegion(HeapRegion* hr) { |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3854 // 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
|
3855 // 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
|
3856 // 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
|
3857 // 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
|
3858 // 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
|
3859 // 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
|
3860 // 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
|
3861 // 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
|
3862 // evacuation failure handling. |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3863 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
|
3864 |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3865 // 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
|
3866 // perform on CSet regions. |
1261
0414c1049f15
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
1245
diff
changeset
|
3867 return false; |
0414c1049f15
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
1245
diff
changeset
|
3868 } |
0414c1049f15
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
1245
diff
changeset
|
3869 }; |
3777
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3870 #endif // ASSERT |
1261
0414c1049f15
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
1245
diff
changeset
|
3871 |
1709 | 3872 #if TASKQUEUE_STATS |
3873 void G1CollectedHeap::print_taskqueue_stats_hdr(outputStream* const st) { | |
3874 st->print_raw_cr("GC Task Stats"); | |
3875 st->print_raw("thr "); TaskQueueStats::print_header(1, st); st->cr(); | |
3876 st->print_raw("--- "); TaskQueueStats::print_header(2, st); st->cr(); | |
3877 } | |
3878 | |
3879 void G1CollectedHeap::print_taskqueue_stats(outputStream* const st) const { | |
3880 print_taskqueue_stats_hdr(st); | |
3881 | |
3882 TaskQueueStats totals; | |
1755
8e5955ddf8e4
6978300: G1: debug builds crash if ParallelGCThreads==0
jcoomes
parents:
1719
diff
changeset
|
3883 const int n = workers() != NULL ? workers()->total_workers() : 1; |
1709 | 3884 for (int i = 0; i < n; ++i) { |
3885 st->print("%3d ", i); task_queue(i)->stats.print(st); st->cr(); | |
3886 totals += task_queue(i)->stats; | |
3887 } | |
3888 st->print_raw("tot "); totals.print(st); st->cr(); | |
3889 | |
3890 DEBUG_ONLY(totals.verify()); | |
3891 } | |
3892 | |
3893 void G1CollectedHeap::reset_taskqueue_stats() { | |
1755
8e5955ddf8e4
6978300: G1: debug builds crash if ParallelGCThreads==0
jcoomes
parents:
1719
diff
changeset
|
3894 const int n = workers() != NULL ? workers()->total_workers() : 1; |
1709 | 3895 for (int i = 0; i < n; ++i) { |
3896 task_queue(i)->stats.reset(); | |
3897 } | |
3898 } | |
3899 #endif // TASKQUEUE_STATS | |
3900 | |
6752
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3901 void G1CollectedHeap::log_gc_header() { |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3902 if (!G1Log::fine()) { |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3903 return; |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3904 } |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3905 |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3906 gclog_or_tty->date_stamp(PrintGCDateStamps); |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3907 gclog_or_tty->stamp(PrintGCTimeStamps); |
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 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
|
3910 .append(g1_policy()->gcs_are_young() ? "(young)" : "(mixed)") |
6752
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3911 .append(g1_policy()->during_initial_mark_pause() ? " (initial-mark)" : ""); |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3912 |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3913 gclog_or_tty->print("[%s", (const char*)gc_cause_str); |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3914 } |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3915 |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3916 void G1CollectedHeap::log_gc_footer(double pause_time_sec) { |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3917 if (!G1Log::fine()) { |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3918 return; |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3919 } |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3920 |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3921 if (G1Log::finer()) { |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3922 if (evacuation_failed()) { |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3923 gclog_or_tty->print(" (to-space exhausted)"); |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3924 } |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3925 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
|
3926 g1_policy()->phase_times()->note_gc_end(); |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3927 g1_policy()->phase_times()->print(pause_time_sec); |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3928 g1_policy()->print_detailed_heap_transition(); |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3929 } else { |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3930 if (evacuation_failed()) { |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3931 gclog_or_tty->print("--"); |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3932 } |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3933 g1_policy()->print_heap_transition(); |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3934 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
|
3935 } |
7207
0f80645e9c26
8004170: G1: Verbose GC output is not getting flushed to log file using JDK 8
johnc
parents:
6863
diff
changeset
|
3936 gclog_or_tty->flush(); |
6752
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3937 } |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3938 |
1973 | 3939 bool |
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
3940 G1CollectedHeap::do_collection_pause_at_safepoint(double target_pause_time_ms) { |
2152 | 3941 assert_at_safepoint(true /* should_be_vm_thread */); |
3942 guarantee(!is_gc_active(), "collection is not reentrant"); | |
3943 | |
1359
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1313
diff
changeset
|
3944 if (GC_locker::check_active_before_gc()) { |
1973 | 3945 return false; |
1359
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1313
diff
changeset
|
3946 } |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1313
diff
changeset
|
3947 |
13400
86e6d691f2e1
8028128: Add a type safe alternative for working with counter based data
mgronlun
parents:
13062
diff
changeset
|
3948 _gc_timer_stw->register_gc_start(); |
10405 | 3949 |
3950 _gc_tracer_stw->report_gc_start(gc_cause(), _gc_timer_stw->gc_start()); | |
3951 | |
2125
7246a374a9f2
6458402: 3 jvmti tests fail with CMS and +ExplicitGCInvokesConcurrent
kamg
parents:
2039
diff
changeset
|
3952 SvcGCMarker sgcm(SvcGCMarker::MINOR); |
2039
7c5250dbd584
6896624: G1: hotspot:::gc and hotspot:::mem-pool-gc probes are not fired
tonyp
parents:
2038
diff
changeset
|
3953 ResourceMark rm; |
7c5250dbd584
6896624: G1: hotspot:::gc and hotspot:::mem-pool-gc probes are not fired
tonyp
parents:
2038
diff
changeset
|
3954 |
4872
aa3d708d67c4
7141200: log some interesting information in ring buffers for crashes
never
parents:
4787
diff
changeset
|
3955 print_heap_before_gc(); |
10405 | 3956 trace_heap_before_gc(_gc_tracer_stw); |
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3957 |
2152 | 3958 verify_region_sets_optional(); |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
3959 verify_dirty_young_regions(); |
2152 | 3960 |
4831
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3961 // 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
|
3962 // 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
|
3963 // for the duration of this pause. |
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3964 g1_policy()->decide_on_conc_mark_initiation(); |
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3965 |
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3966 // 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
|
3967 assert(!g1_policy()->during_initial_mark_pause() || |
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3968 g1_policy()->gcs_are_young(), "sanity"); |
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3969 |
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3970 // 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
|
3971 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
|
3972 |
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3973 // 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
|
3974 // 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
|
3975 // 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
|
3976 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
|
3977 |
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3978 // 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
|
3979 { |
10405 | 3980 EvacuationInfo evacuation_info; |
3981 | |
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
3982 if (g1_policy()->during_initial_mark_pause()) { |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
3983 // 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
|
3984 // full collection counter. |
6120
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
3985 increment_old_marking_cycles_started(); |
10405 | 3986 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
|
3987 } |
10405 | 3988 |
3989 _gc_tracer_stw->report_yc_type(yc_type()); | |
3990 | |
6007
5c86f8211d1e
7160728: Introduce an extra logging level for G1 logging
brutisso
parents:
5987
diff
changeset
|
3991 TraceCPUTime tcpu(G1Log::finer(), true, gclog_or_tty); |
6030 | 3992 |
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
3993 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
|
3994 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
|
3995 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
|
3996 g1_policy()->phase_times()->note_gc_start(active_workers); |
6752
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3997 log_gc_header(); |
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3998 |
3289
b52782ae3880
6946417: G1: Java VisualVM does not support G1 properly.
jmasa
parents:
3285
diff
changeset
|
3999 TraceCollectorStats tcs(g1mm()->incremental_collection_counters()); |
3356
78542e2b5e35
7036199: Adding a notification to the implementation of GarbageCollectorMXBeans
fparain
parents:
3323
diff
changeset
|
4000 TraceMemoryManagerStats tms(false /* fullGC */, gc_cause()); |
1089
db0d5eba9d20
6815790: G1: Missing MemoryPoolMXBeans with -XX:+UseG1GC
tonyp
parents:
1088
diff
changeset
|
4001 |
2361 | 4002 // If the secondary_free_list is not empty, append it to the |
4003 // free_list. No need to wait for the cleanup operation to finish; | |
4004 // the region allocation code will check the secondary_free_list | |
4005 // and wait if necessary. If the G1StressConcRegionFreeing flag is | |
4006 // set, skip this step so that the region allocation code has to | |
4007 // get entries from the secondary_free_list. | |
2152 | 4008 if (!G1StressConcRegionFreeing) { |
2361 | 4009 append_secondary_free_list_if_not_empty_with_lock(); |
2152 | 4010 } |
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4011 |
12080 | 4012 assert(check_young_list_well_formed(), "young list should be well formed"); |
4013 assert(check_heap_region_claim_values(HeapRegion::InitialClaimValue), | |
4014 "sanity check"); | |
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4015 |
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
4016 // 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
|
4017 // 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
|
4018 // it will be set. |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
4019 |
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4020 { // 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
|
4021 IsGCActiveMark x; |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4022 |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4023 gc_prologue(false); |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4024 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
|
4025 increment_gc_time_stamp(); |
342 | 4026 |
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
|
4027 verify_before_gc(); |
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4028 |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4029 COMPILER2_PRESENT(DerivedPointerTable::clear()); |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4030 |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4031 // Please see comment in g1CollectedHeap.hpp and |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4032 // G1CollectedHeap::ref_processing_init() to see how |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4033 // reference processing currently works in G1. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4034 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4035 // Enable discovery in the STW reference processor |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4036 ref_processor_stw()->enable_discovery(true /*verify_disabled*/, |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4037 true /*verify_no_refs*/); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4038 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4039 { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4040 // We want to temporarily turn off discovery by the |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4041 // CM ref processor, if necessary, and turn it back on |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4042 // on again later if we do. Using a scoped |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4043 // NoRefDiscovery object will do this. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4044 NoRefDiscovery no_cm_discovery(ref_processor_cm()); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4045 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4046 // 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
|
4047 // of the collection set!). |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4048 release_mutator_alloc_region(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4049 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4050 // We should call this after we retire the mutator alloc |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4051 // region(s) so that all the ALLOC / RETIRE events are generated |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4052 // before the start GC event. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4053 _hr_printer.start_gc(false /* full */, (size_t) total_collections()); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
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 // 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
|
4056 // 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
|
4057 // 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
|
4058 // |
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
4059 // 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
|
4060 // |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4061 // The elapsed time induced by the start time below deliberately elides |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4062 // 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
|
4063 double sample_start_time_sec = os::elapsedTime(); |
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4064 |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4065 #if YOUNG_LIST_VERBOSE |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4066 gclog_or_tty->print_cr("\nBefore recording pause start.\nYoung_list:"); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4067 _young_list->print(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4068 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
|
4069 #endif // YOUNG_LIST_VERBOSE |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4070 |
10098
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
8855
diff
changeset
|
4071 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
|
4072 |
4837
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
4073 double scan_wait_start = os::elapsedTime(); |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
4074 // 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
|
4075 // 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
|
4076 // 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
|
4077 // moving them during the GC. |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
4078 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
|
4079 double wait_time_ms = 0.0; |
4837
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
4080 if (waited) { |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
4081 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
|
4082 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
|
4083 } |
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
4084 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
|
4085 |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4086 #if YOUNG_LIST_VERBOSE |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4087 gclog_or_tty->print_cr("\nAfter recording pause start.\nYoung_list:"); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4088 _young_list->print(); |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4089 #endif // YOUNG_LIST_VERBOSE |
342 | 4090 |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4091 if (g1_policy()->during_initial_mark_pause()) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4092 concurrent_mark()->checkpointRootsInitialPre(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4093 } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4094 |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4095 #if YOUNG_LIST_VERBOSE |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4096 gclog_or_tty->print_cr("\nBefore choosing collection set.\nYoung_list:"); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4097 _young_list->print(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4098 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
|
4099 #endif // YOUNG_LIST_VERBOSE |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4100 |
10405 | 4101 g1_policy()->finalize_cset(target_pause_time_ms, evacuation_info); |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4102 |
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4103 _cm->note_start_of_gc(); |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4104 // 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
|
4105 // 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
|
4106 // 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
|
4107 // ensure that the CSet has been finalized. |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4108 _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
|
4109 true /* verify_enqueued_buffers */, |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4110 false /* verify_thread_buffers */, |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4111 true /* verify_fingers */); |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4112 |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4113 if (_hr_printer.is_active()) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4114 HeapRegion* hr = g1_policy()->collection_set(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4115 while (hr != NULL) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4116 G1HRPrinter::RegionType type; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4117 if (!hr->is_young()) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4118 type = G1HRPrinter::Old; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4119 } else if (hr->is_survivor()) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4120 type = G1HRPrinter::Survivor; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4121 } else { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4122 type = G1HRPrinter::Eden; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4123 } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4124 _hr_printer.cset(hr); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4125 hr = hr->next_in_collection_set(); |
3778
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
4126 } |
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
4127 } |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4128 |
3777
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
4129 #ifdef ASSERT |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4130 VerifyCSetClosure cl; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4131 collection_set_iterate(&cl); |
3777
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
4132 #endif // ASSERT |
1707 | 4133 |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4134 setup_surviving_young_words(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4135 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4136 // Initialize the GC alloc regions. |
10405 | 4137 init_gc_alloc_regions(evacuation_info); |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4138 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4139 // Actually do the work... |
10405 | 4140 evacuate_collection_set(evacuation_info); |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4141 |
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4142 // 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
|
4143 // (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
|
4144 // 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
|
4145 // 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
|
4146 // we checked. |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4147 _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
|
4148 false /* verify_enqueued_buffers */, |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4149 true /* verify_thread_buffers */, |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4150 true /* verify_fingers */); |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4151 |
10405 | 4152 free_collection_set(g1_policy()->collection_set(), evacuation_info); |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4153 g1_policy()->clear_collection_set(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4154 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4155 cleanup_surviving_young_words(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4156 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4157 // Start a new incremental collection set for the next pause. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4158 g1_policy()->start_incremental_cset_building(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4159 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4160 // Clear the _cset_fast_test bitmap in anticipation of adding |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4161 // regions to the incremental collection set for the next |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4162 // evacuation pause. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4163 clear_cset_fast_test(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4164 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4165 _young_list->reset_sampled_info(); |
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 // Don't check the whole heap at this point as the |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4168 // GC alloc regions from this pause have been tagged |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4169 // as survivors and moved on to the survivor list. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4170 // Survivor regions will fail the !is_young() check. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4171 assert(check_young_list_empty(false /* check_heap */), |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4172 "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
|
4173 |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4174 #if YOUNG_LIST_VERBOSE |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4175 gclog_or_tty->print_cr("Before recording survivors.\nYoung List:"); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4176 _young_list->print(); |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4177 #endif // YOUNG_LIST_VERBOSE |
342 | 4178 |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4179 g1_policy()->record_survivor_regions(_young_list->survivor_length(), |
10405 | 4180 _young_list->first_survivor_region(), |
4181 _young_list->last_survivor_region()); | |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4182 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4183 _young_list->reset_auxilary_lists(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4184 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4185 if (evacuation_failed()) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4186 _summary_bytes_used = recalculate_used(); |
10405 | 4187 uint n_queues = MAX2((int)ParallelGCThreads, 1); |
4188 for (uint i = 0; i < n_queues; i++) { | |
4189 if (_evacuation_failed_info_array[i].has_failed()) { | |
4190 _gc_tracer_stw->report_evacuation_failed(_evacuation_failed_info_array[i]); | |
4191 } | |
4192 } | |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4193 } else { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4194 // The "used" of the the collection set have already been subtracted |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4195 // when they were freed. Add in the bytes evacuated. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4196 _summary_bytes_used += g1_policy()->bytes_copied_during_gc(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4197 } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4198 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4199 if (g1_policy()->during_initial_mark_pause()) { |
4837
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
4200 // 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
|
4201 // 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
|
4202 // appropriate initialization is done on the CM object. |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4203 concurrent_mark()->checkpointRootsInitialPost(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4204 set_marking_started(); |
4831
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4205 // 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
|
4206 // 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
|
4207 // the current thread has completed its logging output. |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4208 } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4209 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4210 allocate_dummy_regions(); |
3285
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
4211 |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4212 #if YOUNG_LIST_VERBOSE |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4213 gclog_or_tty->print_cr("\nEnd of the pause.\nYoung_list:"); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4214 _young_list->print(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4215 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
|
4216 #endif // YOUNG_LIST_VERBOSE |
342 | 4217 |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4218 init_mutator_alloc_region(); |
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 { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4221 size_t expand_bytes = g1_policy()->expansion_amount(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4222 if (expand_bytes > 0) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4223 size_t bytes_before = capacity(); |
4785 | 4224 // No need for an ergo verbose message here, |
4225 // expansion_amount() does this when it returns a value > 0. | |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4226 if (!expand(expand_bytes)) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4227 // We failed to expand the heap so let's verify that |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4228 // committed/uncommitted amount match the backing store |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4229 assert(capacity() == _g1_storage.committed_size(), "committed size mismatch"); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4230 assert(max_capacity() == _g1_storage.reserved_size(), "reserved size mismatch"); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4231 } |
3920
af2ab04e0038
6929868: G1: introduce min / max young gen size bounds
brutisso
parents:
3919
diff
changeset
|
4232 } |
af2ab04e0038
6929868: G1: introduce min / max young gen size bounds
brutisso
parents:
3919
diff
changeset
|
4233 } |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4234 |
10405 | 4235 // 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
|
4236 // 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
|
4237 _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
|
4238 true /* verify_enqueued_buffers */, |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4239 true /* verify_thread_buffers */, |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4240 true /* verify_fingers */); |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4241 _cm->note_end_of_gc(); |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4242 |
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
4243 // 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
|
4244 // 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
|
4245 // 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
|
4246 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
|
4247 double pause_time_ms = (sample_end_time_sec - sample_start_time_sec) * MILLIUNITS; |
10405 | 4248 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
|
4249 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4250 MemoryService::track_memory_usage(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4251 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4252 // 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
|
4253 // update buffers to bring the RSets up-to-date if |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4254 // G1HRRSFlushLogBuffersOnVerify has been set. While scanning |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4255 // 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
|
4256 // regions we just allocated to (i.e., the GC alloc |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4257 // regions). However, during the last GC we called |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4258 // set_saved_mark() on all the GC alloc regions, so card |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4259 // scanning might skip the [saved_mark_word()...top()] area of |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4260 // those regions (i.e., the area we allocated objects into |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4261 // during the last GC). But it shouldn't. Given that |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4262 // saved_mark_word() is conditional on whether the GC time stamp |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4263 // 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
|
4264 // 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
|
4265 // regions and saved_mark_word() will simply return top() for |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4266 // 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
|
4267 // than iterating over the regions and fixing them. In fact, the |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4268 // GC time stamp increment here also ensures that |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4269 // saved_mark_word() will return top() between pauses, i.e., |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4270 // during concurrent refinement. So we don't need the |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4271 // is_gc_active() check to decided which top to use when |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4272 // scanning cards (see CR 7039627). |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4273 increment_gc_time_stamp(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4274 |
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
|
4275 verify_after_gc(); |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4276 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4277 assert(!ref_processor_stw()->discovery_enabled(), "Postcondition"); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4278 ref_processor_stw()->verify_no_references_recorded(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4279 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4280 // 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
|
4281 } |
af2ab04e0038
6929868: G1: introduce min / max young gen size bounds
brutisso
parents:
3919
diff
changeset
|
4282 |
3778
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
4283 // 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
|
4284 // 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
|
4285 // 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
|
4286 // RETIRE events are generated before the end GC event. |
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
4287 _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
|
4288 |
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4289 if (mark_in_progress()) { |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4290 concurrent_mark()->update_g1_committed(); |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4291 } |
546
05c6d52fa7a9
6690928: Use spinning in combination with yields for workstealing termination.
jmasa
parents:
545
diff
changeset
|
4292 |
05c6d52fa7a9
6690928: Use spinning in combination with yields for workstealing termination.
jmasa
parents:
545
diff
changeset
|
4293 #ifdef TRACESPINNING |
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4294 ParallelTaskTerminator::print_termination_counts(); |
546
05c6d52fa7a9
6690928: Use spinning in combination with yields for workstealing termination.
jmasa
parents:
545
diff
changeset
|
4295 #endif |
342 | 4296 |
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4297 gc_epilogue(false); |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4298 } |
6121
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4299 |
7207
0f80645e9c26
8004170: G1: Verbose GC output is not getting flushed to log file using JDK 8
johnc
parents:
6863
diff
changeset
|
4300 // 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
|
4301 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
|
4302 |
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
4303 // 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
|
4304 // 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
|
4305 // 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
|
4306 // logging output either. |
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4307 |
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4308 _hrs.verify_optional(); |
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4309 verify_region_sets_optional(); |
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4310 |
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4311 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
|
4312 TASKQUEUE_STATS_ONLY(reset_taskqueue_stats()); |
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4313 |
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4314 print_heap_after_gc(); |
10405 | 4315 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
|
4316 |
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4317 // 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
|
4318 // 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
|
4319 // 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
|
4320 // before any GC notifications are raised. |
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4321 g1mm()->update_sizes(); |
10405 | 4322 |
4323 _gc_tracer_stw->report_evacuation_info(&evacuation_info); | |
4324 _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
|
4325 _gc_timer_stw->register_gc_end(); |
10405 | 4326 _gc_tracer_stw->report_gc_end(_gc_timer_stw->gc_end(), _gc_timer_stw->time_partitions()); |
4327 } | |
4831
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4328 // 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
|
4329 // 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
|
4330 // that came from the pause. |
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4331 |
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4332 if (should_start_conc_mark) { |
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4333 // CAUTION: after the doConcurrentMark() call below, |
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4334 // the concurrent marking thread(s) could be running |
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4335 // concurrently with us. Make sure that anything after |
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4336 // 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
|
4337 // 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
|
4338 // not start until the safepoint itself is released in |
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4339 // ConcurrentGCThread::safepoint_desynchronize(). |
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4340 doConcurrentMark(); |
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4341 } |
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4342 |
1973 | 4343 return true; |
342 | 4344 } |
4345 | |
1391
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4346 size_t G1CollectedHeap::desired_plab_sz(GCAllocPurpose purpose) |
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4347 { |
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4348 size_t gclab_word_size; |
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4349 switch (purpose) { |
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4350 case GCAllocForSurvived: |
6595 | 4351 gclab_word_size = _survivor_plab_stats.desired_plab_sz(); |
1391
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4352 break; |
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4353 case GCAllocForTenured: |
6595 | 4354 gclab_word_size = _old_plab_stats.desired_plab_sz(); |
1391
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4355 break; |
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4356 default: |
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4357 assert(false, "unknown GCAllocPurpose"); |
6595 | 4358 gclab_word_size = _old_plab_stats.desired_plab_sz(); |
1391
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4359 break; |
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4360 } |
6595 | 4361 |
4362 // Prevent humongous PLAB sizes for two reasons: | |
4363 // * PLABs are allocated using a similar paths as oops, but should | |
4364 // never be in a humongous region | |
4365 // * Allowing humongous PLABs needlessly churns the region free lists | |
4366 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
|
4367 } |
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4368 |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
4369 void G1CollectedHeap::init_mutator_alloc_region() { |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
4370 assert(_mutator_alloc_region.get() == NULL, "pre-condition"); |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
4371 _mutator_alloc_region.init(); |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
4372 } |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
4373 |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
4374 void G1CollectedHeap::release_mutator_alloc_region() { |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
4375 _mutator_alloc_region.release(); |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
4376 assert(_mutator_alloc_region.get() == NULL, "post-condition"); |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
4377 } |
1391
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4378 |
10405 | 4379 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
|
4380 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
|
4381 |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4382 _survivor_gc_alloc_region.init(); |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4383 _old_gc_alloc_region.init(); |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4384 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
|
4385 _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
|
4386 |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4387 // 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
|
4388 // 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
|
4389 // 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
|
4390 // 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
|
4391 // 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
|
4392 // 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
|
4393 // during a cleanup and was added to the free list, but |
10405 | 4394 // 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
|
4395 // 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
|
4396 if (retained_region != NULL && |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4397 !retained_region->in_collection_set() && |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4398 !(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
|
4399 !retained_region->is_empty() && |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4400 !retained_region->isHumongous()) { |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4401 retained_region->set_saved_mark(); |
4072 | 4402 // The retained region was added to the old region set when it was |
4403 // retired. We have to remove it now, since we don't allow regions | |
4404 // we allocate to in the region sets. We'll re-add it later, when | |
4405 // it's retired again. | |
4406 _old_set.remove(retained_region); | |
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4407 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
|
4408 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
|
4409 _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
|
4410 _hr_printer.reuse(retained_region); |
10405 | 4411 evacuation_info.set_alloc_regions_used_before(retained_region->used()); |
4412 } | |
4413 } | |
4414 | |
4415 void G1CollectedHeap::release_gc_alloc_regions(uint no_of_gc_workers, EvacuationInfo& evacuation_info) { | |
4416 evacuation_info.set_allocation_regions(_survivor_gc_alloc_region.count() + | |
4417 _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
|
4418 _survivor_gc_alloc_region.release(); |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4419 // 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
|
4420 // _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
|
4421 // _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
|
4422 // 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
|
4423 // condition. |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4424 _retained_old_gc_alloc_region = _old_gc_alloc_region.release(); |
6595 | 4425 |
4426 if (ResizePLAB) { | |
6819 | 4427 _survivor_plab_stats.adjust_desired_plab_sz(no_of_gc_workers); |
4428 _old_plab_stats.adjust_desired_plab_sz(no_of_gc_workers); | |
6595 | 4429 } |
342 | 4430 } |
4431 | |
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4432 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
|
4433 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
|
4434 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
|
4435 _retained_old_gc_alloc_region = NULL; |
342 | 4436 } |
4437 | |
4438 void G1CollectedHeap::init_for_evac_failure(OopsInHeapRegionClosure* cl) { | |
4439 _drain_in_progress = false; | |
4440 set_evac_failure_closure(cl); | |
6197 | 4441 _evac_failure_scan_stack = new (ResourceObj::C_HEAP, mtGC) GrowableArray<oop>(40, true); |
342 | 4442 } |
4443 | |
4444 void G1CollectedHeap::finalize_for_evac_failure() { | |
4445 assert(_evac_failure_scan_stack != NULL && | |
4446 _evac_failure_scan_stack->length() == 0, | |
4447 "Postcondition"); | |
4448 assert(!_drain_in_progress, "Postcondition"); | |
1045 | 4449 delete _evac_failure_scan_stack; |
342 | 4450 _evac_failure_scan_stack = NULL; |
4451 } | |
4452 | |
4453 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
|
4454 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
|
4455 |
17757
eff02b5bd56c
8035654: Add times for evacuation failure handling in "Other" time
tschatzl
parents:
17756
diff
changeset
|
4456 double remove_self_forwards_start = os::elapsedTime(); |
eff02b5bd56c
8035654: Add times for evacuation failure handling in "Other" time
tschatzl
parents:
17756
diff
changeset
|
4457 |
4783
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4458 G1ParRemoveSelfForwardPtrsTask rsfp_task(this); |
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4459 |
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4460 if (G1CollectedHeap::use_parallel_gc_threads()) { |
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4461 set_par_threads(); |
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4462 workers()->run_task(&rsfp_task); |
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4463 set_par_threads(0); |
616
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
4464 } else { |
4783
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4465 rsfp_task.work(0); |
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4466 } |
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4467 |
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4468 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
|
4469 |
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4470 // 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
|
4471 reset_cset_heap_region_claim_values(); |
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4472 |
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4473 assert(check_cset_heap_region_claim_values(HeapRegion::InitialClaimValue), "sanity"); |
342 | 4474 |
4475 // 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
|
4476 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
|
4477 _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
|
4478 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
|
4479 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
|
4480 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
|
4481 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
|
4482 } |
ad747ee9d0b1
8002144: G1: large number of evacuation failures may lead to large c heap memory usage
brutisso
parents:
7455
diff
changeset
|
4483 _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
|
4484 _preserved_marks_of_objs.clear(true); |
17757
eff02b5bd56c
8035654: Add times for evacuation failure handling in "Other" time
tschatzl
parents:
17756
diff
changeset
|
4485 |
eff02b5bd56c
8035654: Add times for evacuation failure handling in "Other" time
tschatzl
parents:
17756
diff
changeset
|
4486 g1_policy()->phase_times()->record_evac_fail_remove_self_forwards((os::elapsedTime() - remove_self_forwards_start) * 1000.0); |
342 | 4487 } |
4488 | |
4489 void G1CollectedHeap::push_on_evac_failure_scan_stack(oop obj) { | |
4490 _evac_failure_scan_stack->push(obj); | |
4491 } | |
4492 | |
4493 void G1CollectedHeap::drain_evac_failure_scan_stack() { | |
4494 assert(_evac_failure_scan_stack != NULL, "precondition"); | |
4495 | |
4496 while (_evac_failure_scan_stack->length() > 0) { | |
4497 oop obj = _evac_failure_scan_stack->pop(); | |
4498 _evac_failure_closure->set_region(heap_region_containing(obj)); | |
4499 obj->oop_iterate_backwards(_evac_failure_closure); | |
4500 } | |
4501 } | |
4502 | |
4503 oop | |
10405 | 4504 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
|
4505 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
|
4506 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
|
4507 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
|
4508 (HeapWord*) old)); |
342 | 4509 markOop m = old->mark(); |
4510 oop forward_ptr = old->forward_to_atomic(old); | |
4511 if (forward_ptr == NULL) { | |
4512 // Forward-to-self succeeded. | |
10405 | 4513 assert(_par_scan_state != NULL, "par scan state"); |
4514 OopsInHeapRegionClosure* cl = _par_scan_state->evac_failure_closure(); | |
4515 uint queue_num = _par_scan_state->queue_num(); | |
4516 | |
4517 _evacuation_failed = true; | |
4518 _evacuation_failed_info_array[queue_num].register_copy_failure(old->size()); | |
342 | 4519 if (_evac_failure_closure != cl) { |
4520 MutexLockerEx x(EvacFailureStack_lock, Mutex::_no_safepoint_check_flag); | |
4521 assert(!_drain_in_progress, | |
4522 "Should only be true while someone holds the lock."); | |
4523 // Set the global evac-failure closure to the current thread's. | |
4524 assert(_evac_failure_closure == NULL, "Or locking has failed."); | |
4525 set_evac_failure_closure(cl); | |
4526 // Now do the common part. | |
4527 handle_evacuation_failure_common(old, m); | |
4528 // Reset to NULL. | |
4529 set_evac_failure_closure(NULL); | |
4530 } else { | |
4531 // The lock is already held, and this is recursive. | |
4532 assert(_drain_in_progress, "This should only be the recursive case."); | |
4533 handle_evacuation_failure_common(old, m); | |
4534 } | |
4535 return old; | |
4536 } 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
|
4537 // 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
|
4538 // 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
|
4539 // 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
|
4540 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
|
4541 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
|
4542 "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
|
4543 (HeapWord*) old, (HeapWord*) forward_ptr)); |
342 | 4544 return forward_ptr; |
4545 } | |
4546 } | |
4547 | |
4548 void G1CollectedHeap::handle_evacuation_failure_common(oop old, markOop m) { | |
4549 preserve_mark_if_necessary(old, m); | |
4550 | |
4551 HeapRegion* r = heap_region_containing(old); | |
4552 if (!r->evacuation_failed()) { | |
4553 r->set_evacuation_failed(true); | |
3778
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
4554 _hr_printer.evac_failure(r); |
342 | 4555 } |
4556 | |
4557 push_on_evac_failure_scan_stack(old); | |
4558 | |
4559 if (!_drain_in_progress) { | |
4560 // prevent recursion in copy_to_survivor_space() | |
4561 _drain_in_progress = true; | |
4562 drain_evac_failure_scan_stack(); | |
4563 _drain_in_progress = false; | |
4564 } | |
4565 } | |
4566 | |
4567 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
|
4568 assert(evacuation_failed(), "Oversaving!"); |
74ee0db180fa
6807801: CMS: could save/restore fewer header words during scavenge
ysr
parents:
2037
diff
changeset
|
4569 // 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
|
4570 // case of a promotion failure. |
74ee0db180fa
6807801: CMS: could save/restore fewer header words during scavenge
ysr
parents:
2037
diff
changeset
|
4571 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
|
4572 _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
|
4573 _preserved_marks_of_objs.push(m); |
342 | 4574 } |
4575 } | |
4576 | |
4577 HeapWord* G1CollectedHeap::par_allocate_during_gc(GCAllocPurpose purpose, | |
4578 size_t word_size) { | |
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4579 if (purpose == GCAllocForSurvived) { |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4580 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
|
4581 if (result != NULL) { |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4582 return result; |
342 | 4583 } else { |
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4584 // 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
|
4585 // object there. |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4586 return old_attempt_allocation(word_size); |
342 | 4587 } |
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4588 } else { |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4589 assert(purpose == GCAllocForTenured, "sanity"); |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4590 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
|
4591 if (result != NULL) { |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4592 return result; |
342 | 4593 } else { |
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4594 // Let's try to allocate in the 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
|
4595 // object there. |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4596 return survivor_attempt_allocation(word_size); |
342 | 4597 } |
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4598 } |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4599 |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4600 ShouldNotReachHere(); |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4601 // 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
|
4602 return NULL; |
342 | 4603 } |
4604 | |
3886
eeae91c9baba
7080389: G1: refactor marking code in evacuation pause copy closures
johnc
parents:
3869
diff
changeset
|
4605 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
|
4606 ParGCAllocBuffer(gclab_word_size), _retired(false) { } |
3886
eeae91c9baba
7080389: G1: refactor marking code in evacuation pause copy closures
johnc
parents:
3869
diff
changeset
|
4607 |
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
4608 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
|
4609 : _g1h(g1h), |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4610 _refs(g1h->task_queue(queue_num)), |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4611 _dcq(&g1h->dirty_card_queue_set()), |
12343 | 4612 _ct_bs(g1h->g1_barrier_set()), |
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4613 _g1_rem(g1h->g1_rem_set()), |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4614 _hash_seed(17), _queue_num(queue_num), |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4615 _term_attempts(0), |
1391
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4616 _surviving_alloc_buffer(g1h->desired_plab_sz(GCAllocForSurvived)), |
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4617 _tenured_alloc_buffer(g1h->desired_plab_sz(GCAllocForTenured)), |
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
4618 _age_table(false), _scanner(g1h, this, rp), |
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4619 _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
|
4620 _alloc_buffer_waste(0), _undo_waste(0) { |
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4621 // we allocate G1YoungSurvRateNumRegions plus one entries, since |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4622 // 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
|
4623 // non-young regions (where the age is -1) |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4624 // 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
|
4625 // an attempt to eliminate cache contention |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
4626 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
|
4627 uint array_length = PADDING_ELEM_NUM + |
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
4628 real_length + |
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
4629 PADDING_ELEM_NUM; |
6197 | 4630 _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
|
4631 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
|
4632 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
|
4633 "Not enough space for young surv histo."); |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4634 _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
|
4635 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
|
4636 |
1391
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4637 _alloc_buffers[GCAllocForSurvived] = &_surviving_alloc_buffer; |
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4638 _alloc_buffers[GCAllocForTenured] = &_tenured_alloc_buffer; |
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4639 |
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4640 _start = os::elapsedTime(); |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
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diff
changeset
|
4641 } |
342 | 4642 |
1709 | 4643 void |
4644 G1ParScanThreadState::print_termination_stats_hdr(outputStream* const st) | |
4645 { | |
4646 st->print_raw_cr("GC Termination Stats"); | |
4647 st->print_raw_cr(" elapsed --strong roots-- -------termination-------" | |
4648 " ------waste (KiB)------"); | |
4649 st->print_raw_cr("thr ms ms % ms % attempts" | |
4650 " total alloc undo"); | |
4651 st->print_raw_cr("--- --------- --------- ------ --------- ------ --------" | |
4652 " ------- ------- -------"); | |
4653 } | |
4654 | |
4655 void | |
4656 G1ParScanThreadState::print_termination_stats(int i, | |
4657 outputStream* const st) const | |
4658 { | |
4659 const double elapsed_ms = elapsed_time() * 1000.0; | |
4660 const double s_roots_ms = strong_roots_time() * 1000.0; | |
4661 const double term_ms = term_time() * 1000.0; | |
4662 st->print_cr("%3d %9.2f %9.2f %6.2f " | |
4663 "%9.2f %6.2f " SIZE_FORMAT_W(8) " " | |
4664 SIZE_FORMAT_W(7) " " SIZE_FORMAT_W(7) " " SIZE_FORMAT_W(7), | |
4665 i, elapsed_ms, s_roots_ms, s_roots_ms * 100 / elapsed_ms, | |
4666 term_ms, term_ms * 100 / elapsed_ms, term_attempts(), | |
4667 (alloc_buffer_waste() + undo_waste()) * HeapWordSize / K, | |
4668 alloc_buffer_waste() * HeapWordSize / K, | |
4669 undo_waste() * HeapWordSize / K); | |
4670 } | |
4671 | |
1862
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4672 #ifdef ASSERT |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4673 bool G1ParScanThreadState::verify_ref(narrowOop* ref) const { |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4674 assert(ref != NULL, "invariant"); |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4675 assert(UseCompressedOops, "sanity"); |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4676 assert(!has_partial_array_mask(ref), err_msg("ref=" PTR_FORMAT, ref)); |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4677 oop p = oopDesc::load_decode_heap_oop(ref); |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4678 assert(_g1h->is_in_g1_reserved(p), |
12316
190899198332
7195622: CheckUnhandledOops has limited usefulness now
hseigel
parents:
12233
diff
changeset
|
4679 err_msg("ref=" PTR_FORMAT " p=" PTR_FORMAT, ref, (void *)p)); |
1862
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4680 return true; |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4681 } |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4682 |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4683 bool G1ParScanThreadState::verify_ref(oop* ref) const { |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4684 assert(ref != NULL, "invariant"); |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4685 if (has_partial_array_mask(ref)) { |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4686 // Must be in the collection set--it's already been copied. |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4687 oop p = clear_partial_array_mask(ref); |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4688 assert(_g1h->obj_in_cs(p), |
12316
190899198332
7195622: CheckUnhandledOops has limited usefulness now
hseigel
parents:
12233
diff
changeset
|
4689 err_msg("ref=" PTR_FORMAT " p=" PTR_FORMAT, ref, (void *)p)); |
1862
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4690 } else { |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4691 oop p = oopDesc::load_decode_heap_oop(ref); |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4692 assert(_g1h->is_in_g1_reserved(p), |
12316
190899198332
7195622: CheckUnhandledOops has limited usefulness now
hseigel
parents:
12233
diff
changeset
|
4693 err_msg("ref=" PTR_FORMAT " p=" PTR_FORMAT, ref, (void *)p)); |
1862
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4694 } |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4695 return true; |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4696 } |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4697 |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4698 bool G1ParScanThreadState::verify_task(StarTask ref) const { |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4699 if (ref.is_narrow()) { |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4700 return verify_ref((narrowOop*) ref); |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4701 } else { |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4702 return verify_ref((oop*) ref); |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4703 } |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4704 } |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4705 #endif // ASSERT |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4706 |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4707 void G1ParScanThreadState::trim_queue() { |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4708 assert(_evac_failure_cl != NULL, "not set"); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4709 |
1862
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4710 StarTask ref; |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4711 do { |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4712 // Drain the overflow stack first, so other threads can steal. |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4713 while (refs()->pop_overflow(ref)) { |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4714 deal_with_reference(ref); |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4715 } |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4716 |
1862
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4717 while (refs()->pop_local(ref)) { |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4718 deal_with_reference(ref); |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4719 } |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4720 } while (!refs()->is_empty()); |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4721 } |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4722 |
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4723 G1ParClosureSuper::G1ParClosureSuper(G1CollectedHeap* g1, |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4724 G1ParScanThreadState* par_scan_state) : |
17687
86b64209f715
8027559: Decrease code size and templatizing in G1ParCopyClosure::do_oop_work
tschatzl
parents:
17652
diff
changeset
|
4725 _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
|
4726 _worker_id(par_scan_state->queue_num()) { } |
86b64209f715
8027559: Decrease code size and templatizing in G1ParCopyClosure::do_oop_work
tschatzl
parents:
17652
diff
changeset
|
4727 |
86b64209f715
8027559: Decrease code size and templatizing in G1ParCopyClosure::do_oop_work
tschatzl
parents:
17652
diff
changeset
|
4728 void G1ParCopyHelper::mark_object(oop obj) { |
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4729 #ifdef ASSERT |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4730 HeapRegion* hr = _g1->heap_region_containing(obj); |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4731 assert(hr != NULL, "sanity"); |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4732 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
|
4733 #endif // ASSERT |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4734 |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4735 // 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
|
4736 _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
|
4737 } |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4738 |
17687
86b64209f715
8027559: Decrease code size and templatizing in G1ParCopyClosure::do_oop_work
tschatzl
parents:
17652
diff
changeset
|
4739 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
|
4740 #ifdef ASSERT |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4741 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
|
4742 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
|
4743 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
|
4744 |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4745 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
|
4746 assert(from_hr != NULL, "sanity"); |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4747 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
|
4748 |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4749 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
|
4750 assert(to_hr != NULL, "sanity"); |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4751 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
|
4752 #endif // ASSERT |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4753 |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4754 // 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
|
4755 // 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
|
4756 // 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
|
4757 // image which we know should not be changing. |
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4834
diff
changeset
|
4758 _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
|
4759 } |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4760 |
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
4761 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
|
4762 size_t word_sz = old->size(); |
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
4763 HeapRegion* from_region = _g1h->heap_region_containing_raw(old); |
342 | 4764 // +1 to make the -1 indexes valid... |
4765 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
|
4766 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
|
4767 (!from_region->is_young() && young_index == 0), "invariant" ); |
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
4768 G1CollectorPolicy* g1p = _g1h->g1_policy(); |
342 | 4769 markOop m = old->mark(); |
545 | 4770 int age = m->has_displaced_mark_helper() ? m->displaced_mark_helper()->age() |
4771 : m->age(); | |
4772 GCAllocPurpose alloc_purpose = g1p->evacuation_destination(from_region, age, | |
342 | 4773 word_sz); |
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
4774 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
|
4775 #ifndef PRODUCT |
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
4776 // Should this evacuation fail? |
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
4777 if (_g1h->evacuation_should_fail()) { |
6629
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
4778 if (obj_ptr != NULL) { |
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
4779 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
|
4780 obj_ptr = NULL; |
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
4781 } |
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
4782 } |
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
4783 #endif // !PRODUCT |
342 | 4784 |
4785 if (obj_ptr == NULL) { | |
4786 // This will either forward-to-self, or detect that someone else has | |
4787 // installed a forwarding pointer. | |
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
4788 return _g1h->handle_evacuation_failure_par(this, old); |
342 | 4789 } |
4790 | |
6629
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
4791 oop obj = oop(obj_ptr); |
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
4792 |
526 | 4793 // We're going to allocate linearly, so might as well prefetch ahead. |
4794 Prefetch::write(obj_ptr, PrefetchCopyIntervalInBytes); | |
4795 | |
342 | 4796 oop forward_ptr = old->forward_to_atomic(obj); |
4797 if (forward_ptr == NULL) { | |
4798 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
|
4799 |
b7e42ada4898
8036672: G1: alloc_purpose in copy_to_survivor_space() used incorrectly
pliden
parents:
17748
diff
changeset
|
4800 // 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
|
4801 // 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
|
4802 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
|
4803 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
|
4804 |
526 | 4805 if (g1p->track_object_age(alloc_purpose)) { |
4806 // We could simply do obj->incr_age(). However, this causes a | |
4807 // performance issue. obj->incr_age() will first check whether | |
4808 // the object has a displaced mark by checking its mark word; | |
4809 // getting the mark word from the new location of the object | |
4810 // stalls. So, given that we already have the mark word and we | |
4811 // are about to install it anyway, it's better to increase the | |
4812 // age on the mark word, when the object does not have a | |
4813 // displaced mark word. We're not expecting many objects to have | |
4814 // a displaced marked word, so that case is not optimized | |
4815 // further (it could be...) and we simply call obj->incr_age(). | |
4816 | |
4817 if (m->has_displaced_mark_helper()) { | |
4818 // in this case, we have to install the mark word first, | |
4819 // otherwise obj looks to be forwarded (the old mark word, | |
4820 // which contains the forward pointer, was copied) | |
4821 obj->set_mark(m); | |
4822 obj->incr_age(); | |
4823 } else { | |
4824 m = m->incr_age(); | |
545 | 4825 obj->set_mark(m); |
526 | 4826 } |
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
4827 age_table()->add(obj, word_sz); |
545 | 4828 } else { |
4829 obj->set_mark(m); | |
526 | 4830 } |
4831 | |
17764 | 4832 if (G1StringDedup::is_enabled()) { |
4833 G1StringDedup::enqueue_from_evacuation(from_region->is_young(), | |
4834 to_region->is_young(), | |
4835 queue_num(), | |
4836 obj); | |
4837 } | |
4838 | |
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
4839 size_t* surv_young_words = surviving_young_words(); |
342 | 4840 surv_young_words[young_index] += word_sz; |
4841 | |
4842 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
|
4843 // 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
|
4844 // 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
|
4845 // 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
|
4846 arrayOop(obj)->set_length(0); |
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4847 oop* old_p = set_partial_array_mask(old); |
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
4848 push_on_queue(old_p); |
342 | 4849 } else { |
526 | 4850 // No point in using the slower heap_region_containing() method, |
4851 // 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
|
4852 _scanner.set_region(_g1h->heap_region_containing_raw(obj)); |
5987 | 4853 obj->oop_iterate_backwards(&_scanner); |
342 | 4854 } |
4855 } else { | |
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
4856 undo_allocation(alloc_purpose, obj_ptr, word_sz); |
342 | 4857 obj = forward_ptr; |
4858 } | |
4859 return obj; | |
4860 } | |
4861 | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4862 template <class T> |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4863 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
|
4864 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
|
4865 _scanned_klass->record_modified_oops(); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4866 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4867 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4868 |
17636
889068b9a088
8027746: Remove do_gen_barrier template parameter in G1ParCopyClosure
tschatzl
parents:
17634
diff
changeset
|
4869 template <G1Barrier barrier, bool do_mark_object> |
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4870 template <class T> |
17687
86b64209f715
8027559: Decrease code size and templatizing in G1ParCopyClosure::do_oop_work
tschatzl
parents:
17652
diff
changeset
|
4871 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
|
4872 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
|
4873 |
2c2ae9e5f65d
8035326: Assume non-NULL references in G1CollectedHeap::in_cset_fast_test
tschatzl
parents:
17687
diff
changeset
|
4874 if (oopDesc::is_null(heap_oop)) { |
2c2ae9e5f65d
8035326: Assume non-NULL references in G1CollectedHeap::in_cset_fast_test
tschatzl
parents:
17687
diff
changeset
|
4875 return; |
2c2ae9e5f65d
8035326: Assume non-NULL references in G1CollectedHeap::in_cset_fast_test
tschatzl
parents:
17687
diff
changeset
|
4876 } |
2c2ae9e5f65d
8035326: Assume non-NULL references in G1CollectedHeap::in_cset_fast_test
tschatzl
parents:
17687
diff
changeset
|
4877 |
2c2ae9e5f65d
8035326: Assume non-NULL references in G1CollectedHeap::in_cset_fast_test
tschatzl
parents:
17687
diff
changeset
|
4878 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
|
4879 |
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4834
diff
changeset
|
4880 assert(_worker_id == _par_scan_state->queue_num(), "sanity"); |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4834
diff
changeset
|
4881 |
1261
0414c1049f15
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
1245
diff
changeset
|
4882 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
|
4883 oop forwardee; |
526 | 4884 if (obj->is_forwarded()) { |
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4885 forwardee = obj->forwardee(); |
526 | 4886 } else { |
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
4887 forwardee = _par_scan_state->copy_to_survivor_space(obj); |
342 | 4888 } |
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4889 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
|
4890 oopDesc::encode_store_heap_oop(p, forwardee); |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4891 if (do_mark_object && forwardee != obj) { |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4892 // 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
|
4893 // 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
|
4894 mark_forwarded_object(obj, forwardee); |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4895 } |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4896 |
17636
889068b9a088
8027746: Remove do_gen_barrier template parameter in G1ParCopyClosure
tschatzl
parents:
17634
diff
changeset
|
4897 if (barrier == G1BarrierKlass) { |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4898 do_klass_barrier(p, forwardee); |
342 | 4899 } |
3886
eeae91c9baba
7080389: G1: refactor marking code in evacuation pause copy closures
johnc
parents:
3869
diff
changeset
|
4900 } else { |
eeae91c9baba
7080389: G1: refactor marking code in evacuation pause copy closures
johnc
parents:
3869
diff
changeset
|
4901 // 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
|
4902 // 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
|
4903 // 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
|
4904 if (do_mark_object) { |
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4905 mark_object(obj); |
3886
eeae91c9baba
7080389: G1: refactor marking code in evacuation pause copy closures
johnc
parents:
3869
diff
changeset
|
4906 } |
526 | 4907 } |
4908 | |
17688
2c2ae9e5f65d
8035326: Assume non-NULL references in G1CollectedHeap::in_cset_fast_test
tschatzl
parents:
17687
diff
changeset
|
4909 if (barrier == G1BarrierEvac) { |
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4834
diff
changeset
|
4910 _par_scan_state->update_rs(_from, p, _worker_id); |
526 | 4911 } |
17636
889068b9a088
8027746: Remove do_gen_barrier template parameter in G1ParCopyClosure
tschatzl
parents:
17634
diff
changeset
|
4912 } |
889068b9a088
8027746: Remove do_gen_barrier template parameter in G1ParCopyClosure
tschatzl
parents:
17634
diff
changeset
|
4913 |
889068b9a088
8027746: Remove do_gen_barrier template parameter in G1ParCopyClosure
tschatzl
parents:
17634
diff
changeset
|
4914 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
|
4915 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
|
4916 |
342 | 4917 class G1ParEvacuateFollowersClosure : public VoidClosure { |
4918 protected: | |
4919 G1CollectedHeap* _g1h; | |
4920 G1ParScanThreadState* _par_scan_state; | |
4921 RefToScanQueueSet* _queues; | |
4922 ParallelTaskTerminator* _terminator; | |
4923 | |
4924 G1ParScanThreadState* par_scan_state() { return _par_scan_state; } | |
4925 RefToScanQueueSet* queues() { return _queues; } | |
4926 ParallelTaskTerminator* terminator() { return _terminator; } | |
4927 | |
4928 public: | |
4929 G1ParEvacuateFollowersClosure(G1CollectedHeap* g1h, | |
4930 G1ParScanThreadState* par_scan_state, | |
4931 RefToScanQueueSet* queues, | |
4932 ParallelTaskTerminator* terminator) | |
4933 : _g1h(g1h), _par_scan_state(par_scan_state), | |
4934 _queues(queues), _terminator(terminator) {} | |
4935 | |
1862
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4936 void do_void(); |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4937 |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4938 private: |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4939 inline bool offer_termination(); |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4940 }; |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4941 |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4942 bool G1ParEvacuateFollowersClosure::offer_termination() { |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4943 G1ParScanThreadState* const pss = par_scan_state(); |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4944 pss->start_term_time(); |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4945 const bool res = terminator()->offer_termination(); |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4946 pss->end_term_time(); |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4947 return res; |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4948 } |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4949 |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4950 void G1ParEvacuateFollowersClosure::do_void() { |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4951 StarTask stolen_task; |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4952 G1ParScanThreadState* const pss = par_scan_state(); |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4953 pss->trim_queue(); |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4954 |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4955 do { |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4956 while (queues()->steal(pss->queue_num(), pss->hash_seed(), stolen_task)) { |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4957 assert(pss->verify_task(stolen_task), "sanity"); |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4958 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
|
4959 pss->deal_with_reference((narrowOop*) stolen_task); |
1862
b14ec34b1e07
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4960 } else { |
1883
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|
4961 pss->deal_with_reference((oop*) stolen_task); |
1862
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4962 } |
1883
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4963 |
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|
4964 // We've just processed a reference and we might have made |
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|
4965 // available new entries on the queues. So we have to make sure |
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4966 // we drain the queues as necessary. |
342 | 4967 pss->trim_queue(); |
4968 } | |
1862
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4969 } while (!offer_termination()); |
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|
4970 |
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4971 pss->retire_alloc_buffers(); |
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4972 } |
342 | 4973 |
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4974 class G1KlassScanClosure : public KlassClosure { |
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4975 G1ParCopyHelper* _closure; |
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4976 bool _process_only_dirty; |
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4977 int _count; |
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4978 public: |
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4979 G1KlassScanClosure(G1ParCopyHelper* closure, bool process_only_dirty) |
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4980 : _process_only_dirty(process_only_dirty), _closure(closure), _count(0) {} |
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4981 void do_klass(Klass* klass) { |
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4982 // If the klass has not been dirtied we know that there's |
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4983 // no references into the young gen and we can skip it. |
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4984 if (!_process_only_dirty || klass->has_modified_oops()) { |
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4985 // Clean the klass since we're going to scavenge all the metadata. |
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4986 klass->clear_modified_oops(); |
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4987 |
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4988 // Tell the closure that this klass is the Klass to scavenge |
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4989 // and is the one to dirty if oops are left pointing into the young gen. |
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4990 _closure->set_scanned_klass(klass); |
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4991 |
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4992 klass->oops_do(_closure); |
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4993 |
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4994 _closure->set_scanned_klass(NULL); |
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4995 } |
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4996 _count++; |
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4997 } |
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4998 }; |
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4999 |
342 | 5000 class G1ParTask : public AbstractGangTask { |
5001 protected: | |
5002 G1CollectedHeap* _g1h; | |
5003 RefToScanQueueSet *_queues; | |
5004 ParallelTaskTerminator _terminator; | |
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5005 uint _n_workers; |
342 | 5006 |
5007 Mutex _stats_lock; | |
5008 Mutex* stats_lock() { return &_stats_lock; } | |
5009 | |
5010 size_t getNCards() { | |
5011 return (_g1h->capacity() + G1BlockOffsetSharedArray::N_bytes - 1) | |
5012 / G1BlockOffsetSharedArray::N_bytes; | |
5013 } | |
5014 | |
5015 public: | |
4095
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5016 G1ParTask(G1CollectedHeap* g1h, |
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5017 RefToScanQueueSet *task_queues) |
342 | 5018 : AbstractGangTask("G1 collection"), |
5019 _g1h(g1h), | |
5020 _queues(task_queues), | |
4095
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5021 _terminator(0, _queues), |
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5022 _stats_lock(Mutex::leaf, "parallel G1 stats lock", true) |
342 | 5023 {} |
5024 | |
5025 RefToScanQueueSet* queues() { return _queues; } | |
5026 | |
5027 RefToScanQueue *work_queue(int i) { | |
5028 return queues()->queue(i); | |
5029 } | |
5030 | |
4095
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|
5031 ParallelTaskTerminator* terminator() { return &_terminator; } |
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|
5032 |
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|
5033 virtual void set_for_termination(int active_workers) { |
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5034 // This task calls set_n_termination() in par_non_clean_card_iterate_work() |
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|
5035 // in the young space (_par_seq_tasks) in the G1 heap |
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|
5036 // for SequentialSubTasksDone. |
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|
5037 // This task also uses SubTasksDone in SharedHeap and G1CollectedHeap |
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|
5038 // both of which need setting by set_n_termination(). |
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|
5039 _g1h->SharedHeap::set_n_termination(active_workers); |
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|
5040 _g1h->set_n_termination(active_workers); |
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|
5041 terminator()->reset_for_reuse(active_workers); |
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|
5042 _n_workers = active_workers; |
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|
5043 } |
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|
5044 |
4728
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|
5045 void work(uint worker_id) { |
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|
5046 if (worker_id >= _n_workers) return; // no work needed this round |
1611 | 5047 |
5048 double start_time_ms = os::elapsedTime() * 1000.0; | |
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5049 _g1h->g1_policy()->phase_times()->record_gc_worker_start_time(worker_id, start_time_ms); |
1611 | 5050 |
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|
5051 { |
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|
5052 ResourceMark rm; |
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|
5053 HandleMark hm; |
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|
5054 |
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|
5055 ReferenceProcessor* rp = _g1h->ref_processor_stw(); |
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|
5056 |
17689
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|
5057 G1ParScanThreadState pss(_g1h, worker_id, rp); |
5986
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|
5058 G1ParScanHeapEvacFailureClosure evac_failure_cl(_g1h, &pss, rp); |
17759
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|
5059 |
5986
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|
5060 pss.set_evac_failure_closure(&evac_failure_cl); |
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|
5061 |
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|
5062 G1ParScanExtRootClosure only_scan_root_cl(_g1h, &pss, rp); |
6725
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|
5063 G1ParScanMetadataClosure only_scan_metadata_cl(_g1h, &pss, rp); |
5986
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|
5064 |
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|
5065 G1ParScanAndMarkExtRootClosure scan_mark_root_cl(_g1h, &pss, rp); |
6725
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|
5066 G1ParScanAndMarkMetadataClosure scan_mark_metadata_cl(_g1h, &pss, rp); |
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|
5067 |
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|
5068 bool only_young = _g1h->g1_policy()->gcs_are_young(); |
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|
5069 G1KlassScanClosure scan_mark_klasses_cl_s(&scan_mark_metadata_cl, false); |
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|
5070 G1KlassScanClosure only_scan_klasses_cl_s(&only_scan_metadata_cl, only_young); |
5986
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|
5071 |
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|
5072 OopClosure* scan_root_cl = &only_scan_root_cl; |
6725
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|
5073 G1KlassScanClosure* scan_klasses_cl = &only_scan_klasses_cl_s; |
5986
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|
5074 |
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|
5075 if (_g1h->g1_policy()->during_initial_mark_pause()) { |
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|
5076 // We also need to mark copied objects. |
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|
5077 scan_root_cl = &scan_mark_root_cl; |
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|
5078 scan_klasses_cl = &scan_mark_klasses_cl_s; |
5986
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|
5079 } |
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|
5080 |
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|
5081 G1ParPushHeapRSClosure push_heap_rs_cl(_g1h, &pss); |
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|
5082 |
12080 | 5083 // Don't scan the scavengable methods in the code cache as part |
5084 // of strong root scanning. The code roots that point into a | |
5085 // region in the collection set are scanned when we scan the | |
5086 // region's RSet. | |
5087 int so = SharedHeap::SO_AllClasses | SharedHeap::SO_Strings; | |
6725
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|
5088 |
5986
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|
5089 pss.start_strong_roots(); |
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|
5090 _g1h->g1_process_strong_roots(/* is scavenging */ true, |
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|
5091 SharedHeap::ScanningOption(so), |
5986
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|
5092 scan_root_cl, |
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|
5093 &push_heap_rs_cl, |
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|
5094 scan_klasses_cl, |
5986
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|
5095 worker_id); |
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|
5096 pss.end_strong_roots(); |
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|
5097 |
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|
5098 { |
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|
5099 double start = os::elapsedTime(); |
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|
5100 G1ParEvacuateFollowersClosure evac(_g1h, &pss, _queues, &_terminator); |
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|
5101 evac.do_void(); |
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|
5102 double elapsed_ms = (os::elapsedTime()-start)*1000.0; |
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|
5103 double term_ms = pss.term_time()*1000.0; |
6628
bb3f6194fedb
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|
5104 _g1h->g1_policy()->phase_times()->add_obj_copy_time(worker_id, elapsed_ms-term_ms); |
6219
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|
5105 _g1h->g1_policy()->phase_times()->record_termination(worker_id, term_ms, pss.term_attempts()); |
5986
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johnc
parents:
5963
diff
changeset
|
5106 } |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5107 _g1h->g1_policy()->record_thread_age_table(pss.age_table()); |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5108 _g1h->update_surviving_young_words(pss.surviving_young_words()+1); |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5109 |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5110 if (ParallelGCVerbose) { |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5111 MutexLocker x(stats_lock()); |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5112 pss.print_termination_stats(worker_id); |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5113 } |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5114 |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
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changeset
|
5115 assert(pss.refs()->is_empty(), "should be empty"); |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5116 |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
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changeset
|
5117 // Close the inner scope so that the ResourceMark and HandleMark |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
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|
5118 // destructors are executed here and are included as part of the |
500023bd0818
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johnc
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diff
changeset
|
5119 // "GC Worker Time". |
342 | 5120 } |
5121 | |
1611 | 5122 double end_time_ms = os::elapsedTime() * 1000.0; |
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
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|
5123 _g1h->g1_policy()->phase_times()->record_gc_worker_end_time(worker_id, end_time_ms); |
342 | 5124 } |
5125 }; | |
5126 | |
5127 // *** Common G1 Evacuation Stuff | |
5128 | |
1833
8b10f48633dc
6984287: Regularize how GC parallel workers are specified.
jmasa
parents:
1755
diff
changeset
|
5129 // This method is run in a GC worker. |
8b10f48633dc
6984287: Regularize how GC parallel workers are specified.
jmasa
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|
5130 |
342 | 5131 void |
5132 G1CollectedHeap:: | |
6725
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6964458: Reimplement class meta-data storage to use native memory
coleenp
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|
5133 g1_process_strong_roots(bool is_scavenging, |
4910
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
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|
5134 ScanningOption so, |
342 | 5135 OopClosure* scan_non_heap_roots, |
5136 OopsInHeapRegionClosure* scan_rs, | |
6725
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6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
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diff
changeset
|
5137 G1KlassScanClosure* scan_klasses, |
17844
8847586c9037
8016302: Change type of the number of GC workers to unsigned int (2)
vkempik
parents:
17833
diff
changeset
|
5138 uint worker_i) { |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5139 |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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changeset
|
5140 // First scan the strong roots |
342 | 5141 double ext_roots_start = os::elapsedTime(); |
5142 double closure_app_time_sec = 0.0; | |
5143 | |
5144 BufferingOopClosure buf_scan_non_heap_roots(scan_non_heap_roots); | |
5145 | |
12080 | 5146 assert(so & SO_CodeCache || scan_rs != NULL, "must scan code roots somehow"); |
5147 // Walk the code cache/strong code roots w/o buffering, because StarTask | |
5148 // cannot handle unaligned oop locations. | |
5149 CodeBlobToOopClosure eager_scan_code_roots(scan_non_heap_roots, true /* do_marking */); | |
989
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
890
diff
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|
5150 |
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
890
diff
changeset
|
5151 process_strong_roots(false, // no scoping; this is parallel code |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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diff
changeset
|
5152 is_scavenging, so, |
342 | 5153 &buf_scan_non_heap_roots, |
989
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
890
diff
changeset
|
5154 &eager_scan_code_roots, |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
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diff
changeset
|
5155 scan_klasses |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5156 ); |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
5157 |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5158 // Now the CM ref_processor roots. |
3823
14a2fd14c0db
7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents:
3778
diff
changeset
|
5159 if (!_process_strong_tasks->is_task_claimed(G1H_PS_refProcessor_oops_do)) { |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5160 // We need to treat the discovered reference lists of the |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5161 // concurrent mark ref processor as roots and keep entries |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5162 // (which are added by the marking threads) on them live |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5163 // until they can be processed at the end of marking. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5164 ref_processor_cm()->weak_oops_do(&buf_scan_non_heap_roots); |
3823
14a2fd14c0db
7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents:
3778
diff
changeset
|
5165 } |
14a2fd14c0db
7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents:
3778
diff
changeset
|
5166 |
14a2fd14c0db
7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents:
3778
diff
changeset
|
5167 // Finish up any enqueued closure apps (attributed as object copy time). |
342 | 5168 buf_scan_non_heap_roots.done(); |
6725
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6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
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diff
changeset
|
5169 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5170 double obj_copy_time_sec = buf_scan_non_heap_roots.closure_app_seconds(); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5171 |
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
5172 g1_policy()->phase_times()->record_obj_copy_time(worker_i, obj_copy_time_sec * 1000.0); |
3823
14a2fd14c0db
7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents:
3778
diff
changeset
|
5173 |
342 | 5174 double ext_root_time_ms = |
6628
bb3f6194fedb
7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code
brutisso
parents:
6611
diff
changeset
|
5175 ((os::elapsedTime() - ext_roots_start) - obj_copy_time_sec) * 1000.0; |
3823
14a2fd14c0db
7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents:
3778
diff
changeset
|
5176 |
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
5177 g1_policy()->phase_times()->record_ext_root_scan_time(worker_i, ext_root_time_ms); |
342 | 5178 |
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
5179 // During conc marking we have to filter the per-thread SATB buffers |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
5180 // to make sure we remove any oops into the CSet (which will show up |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
5181 // as implicitly live). |
6628
bb3f6194fedb
7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code
brutisso
parents:
6611
diff
changeset
|
5182 double satb_filtering_ms = 0.0; |
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
5183 if (!_process_strong_tasks->is_task_claimed(G1H_PS_filter_satb_buffers)) { |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
5184 if (mark_in_progress()) { |
6628
bb3f6194fedb
7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code
brutisso
parents:
6611
diff
changeset
|
5185 double satb_filter_start = os::elapsedTime(); |
bb3f6194fedb
7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code
brutisso
parents:
6611
diff
changeset
|
5186 |
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
5187 JavaThread::satb_mark_queue_set().filter_thread_buffers(); |
6628
bb3f6194fedb
7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code
brutisso
parents:
6611
diff
changeset
|
5188 |
bb3f6194fedb
7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code
brutisso
parents:
6611
diff
changeset
|
5189 satb_filtering_ms = (os::elapsedTime() - satb_filter_start) * 1000.0; |
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
5190 } |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
5191 } |
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
5192 g1_policy()->phase_times()->record_satb_filtering_time(worker_i, satb_filtering_ms); |
342 | 5193 |
12080 | 5194 // If this is an initial mark pause, and we're not scanning |
5195 // the entire code cache, we need to mark the oops in the | |
5196 // strong code root lists for the regions that are not in | |
5197 // the collection set. | |
5198 // Note all threads participate in this set of root tasks. | |
5199 double mark_strong_code_roots_ms = 0.0; | |
5200 if (g1_policy()->during_initial_mark_pause() && !(so & SO_CodeCache)) { | |
5201 double mark_strong_roots_start = os::elapsedTime(); | |
5202 mark_strong_code_roots(worker_i); | |
5203 mark_strong_code_roots_ms = (os::elapsedTime() - mark_strong_roots_start) * 1000.0; | |
5204 } | |
5205 g1_policy()->phase_times()->record_strong_code_root_mark_time(worker_i, mark_strong_code_roots_ms); | |
5206 | |
342 | 5207 // Now scan the complement of the collection set. |
5208 if (scan_rs != NULL) { | |
12080 | 5209 g1_rem_set()->oops_into_collection_set_do(scan_rs, &eager_scan_code_roots, worker_i); |
342 | 5210 } |
5211 _process_strong_tasks->all_tasks_completed(); | |
5212 } | |
5213 | |
5214 void | |
10179
a08c80e9e1e5
8012687: Remove unused is_root checks and closures
stefank
parents:
10099
diff
changeset
|
5215 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
|
5216 CodeBlobToOopClosure roots_in_blobs(root_closure, /*do_marking=*/ false); |
10179
a08c80e9e1e5
8012687: Remove unused is_root checks and closures
stefank
parents:
10099
diff
changeset
|
5217 SharedHeap::process_weak_roots(root_closure, &roots_in_blobs); |
342 | 5218 } |
5219 | |
17634
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
5220 class G1StringSymbolTableUnlinkTask : public AbstractGangTask { |
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
5221 private: |
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
5222 BoolObjectClosure* _is_alive; |
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
5223 int _initial_string_table_size; |
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
5224 int _initial_symbol_table_size; |
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
5225 |
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
5226 bool _process_strings; |
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
5227 int _strings_processed; |
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
5228 int _strings_removed; |
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
5229 |
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
5230 bool _process_symbols; |
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
5231 int _symbols_processed; |
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
5232 int _symbols_removed; |
17652
0eb64cfc0b76
8033443: Test8000311 fails after latest changes to parallelize string and symbol table unlink
tschatzl
parents:
17651
diff
changeset
|
5233 |
0eb64cfc0b76
8033443: Test8000311 fails after latest changes to parallelize string and symbol table unlink
tschatzl
parents:
17651
diff
changeset
|
5234 bool _do_in_parallel; |
17634
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
5235 public: |
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
5236 G1StringSymbolTableUnlinkTask(BoolObjectClosure* is_alive, bool process_strings, bool process_symbols) : |
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
5237 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
|
5238 _do_in_parallel(G1CollectedHeap::use_parallel_gc_threads()), |
17634
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
5239 _process_strings(process_strings), _strings_processed(0), _strings_removed(0), |
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
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13400
diff
changeset
|
5240 _process_symbols(process_symbols), _symbols_processed(0), _symbols_removed(0) { |
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
5241 |
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
5242 _initial_string_table_size = StringTable::the_table()->table_size(); |
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
5243 _initial_symbol_table_size = SymbolTable::the_table()->table_size(); |
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
5244 if (process_strings) { |
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
5245 StringTable::clear_parallel_claimed_index(); |
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
5246 } |
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
5247 if (process_symbols) { |
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
5248 SymbolTable::clear_parallel_claimed_index(); |
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
5249 } |
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
5250 } |
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
5251 |
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
5252 ~G1StringSymbolTableUnlinkTask() { |
17652
0eb64cfc0b76
8033443: Test8000311 fails after latest changes to parallelize string and symbol table unlink
tschatzl
parents:
17651
diff
changeset
|
5253 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
|
5254 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
|
5255 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
|
5256 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
|
5257 err_msg("claim value "INT32_FORMAT" after unlink less than initial symbol table size "INT32_FORMAT, |
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
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13400
diff
changeset
|
5258 SymbolTable::parallel_claimed_index(), _initial_symbol_table_size)); |
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
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13400
diff
changeset
|
5259 } |
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
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|
5260 |
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|
5261 void work(uint worker_id) { |
17652
0eb64cfc0b76
8033443: Test8000311 fails after latest changes to parallelize string and symbol table unlink
tschatzl
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17651
diff
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|
5262 if (_do_in_parallel) { |
17634
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diff
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|
5263 int strings_processed = 0; |
5a32d2a3cc1e
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diff
changeset
|
5264 int strings_removed = 0; |
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diff
changeset
|
5265 int symbols_processed = 0; |
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diff
changeset
|
5266 int symbols_removed = 0; |
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8027476: Improve performance of Stringtable unlink
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|
5267 if (_process_strings) { |
5a32d2a3cc1e
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|
5268 StringTable::possibly_parallel_unlink(_is_alive, &strings_processed, &strings_removed); |
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
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|
5269 Atomic::add(strings_processed, &_strings_processed); |
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
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|
5270 Atomic::add(strings_removed, &_strings_removed); |
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8027476: Improve performance of Stringtable unlink
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diff
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|
5271 } |
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8027476: Improve performance of Stringtable unlink
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diff
changeset
|
5272 if (_process_symbols) { |
5a32d2a3cc1e
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|
5273 SymbolTable::possibly_parallel_unlink(&symbols_processed, &symbols_removed); |
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8027476: Improve performance of Stringtable unlink
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|
5274 Atomic::add(symbols_processed, &_symbols_processed); |
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|
5275 Atomic::add(symbols_removed, &_symbols_removed); |
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|
5276 } |
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diff
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|
5277 } else { |
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|
5278 if (_process_strings) { |
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|
5279 StringTable::unlink(_is_alive, &_strings_processed, &_strings_removed); |
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8027476: Improve performance of Stringtable unlink
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diff
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|
5280 } |
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diff
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|
5281 if (_process_symbols) { |
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|
5282 SymbolTable::unlink(&_symbols_processed, &_symbols_removed); |
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|
5283 } |
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|
5284 } |
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|
5285 } |
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|
5286 |
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|
5287 size_t strings_processed() const { return (size_t)_strings_processed; } |
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|
5288 size_t strings_removed() const { return (size_t)_strings_removed; } |
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|
5289 |
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|
5290 size_t symbols_processed() const { return (size_t)_symbols_processed; } |
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|
5291 size_t symbols_removed() const { return (size_t)_symbols_removed; } |
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|
5292 }; |
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|
5293 |
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|
5294 void G1CollectedHeap::unlink_string_and_symbol_table(BoolObjectClosure* is_alive, |
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|
5295 bool process_strings, bool process_symbols) { |
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|
5296 uint n_workers = (G1CollectedHeap::use_parallel_gc_threads() ? |
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|
5297 _g1h->workers()->active_workers() : 1); |
5a32d2a3cc1e
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|
5298 |
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diff
changeset
|
5299 G1StringSymbolTableUnlinkTask g1_unlink_task(is_alive, process_strings, process_symbols); |
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
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|
5300 if (G1CollectedHeap::use_parallel_gc_threads()) { |
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changeset
|
5301 set_par_threads(n_workers); |
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changeset
|
5302 workers()->run_task(&g1_unlink_task); |
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|
5303 set_par_threads(0); |
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diff
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|
5304 } else { |
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|
5305 g1_unlink_task.work(0); |
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|
5306 } |
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diff
changeset
|
5307 if (G1TraceStringSymbolTableScrubbing) { |
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diff
changeset
|
5308 gclog_or_tty->print_cr("Cleaned string and symbol table, " |
5a32d2a3cc1e
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diff
changeset
|
5309 "strings: "SIZE_FORMAT" processed, "SIZE_FORMAT" removed, " |
5a32d2a3cc1e
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diff
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|
5310 "symbols: "SIZE_FORMAT" processed, "SIZE_FORMAT" removed", |
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tschatzl
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diff
changeset
|
5311 g1_unlink_task.strings_processed(), g1_unlink_task.strings_removed(), |
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|
5312 g1_unlink_task.symbols_processed(), g1_unlink_task.symbols_removed()); |
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|
5313 } |
17764 | 5314 |
5315 if (G1StringDedup::is_enabled()) { | |
5316 G1StringDedup::unlink(is_alive); | |
5317 } | |
17634
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diff
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|
5318 } |
5a32d2a3cc1e
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diff
changeset
|
5319 |
17756
a07bea31ef35
8035398: Add card redirty time in "Other" time in G1
tschatzl
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17755
diff
changeset
|
5320 class RedirtyLoggedCardTableEntryFastClosure : public CardTableEntryClosure { |
a07bea31ef35
8035398: Add card redirty time in "Other" time in G1
tschatzl
parents:
17755
diff
changeset
|
5321 public: |
17844
8847586c9037
8016302: Change type of the number of GC workers to unsigned int (2)
vkempik
parents:
17833
diff
changeset
|
5322 bool do_card_ptr(jbyte* card_ptr, uint worker_i) { |
17756
a07bea31ef35
8035398: Add card redirty time in "Other" time in G1
tschatzl
parents:
17755
diff
changeset
|
5323 *card_ptr = CardTableModRefBS::dirty_card_val(); |
a07bea31ef35
8035398: Add card redirty time in "Other" time in G1
tschatzl
parents:
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diff
changeset
|
5324 return true; |
a07bea31ef35
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tschatzl
parents:
17755
diff
changeset
|
5325 } |
a07bea31ef35
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tschatzl
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17755
diff
changeset
|
5326 }; |
a07bea31ef35
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tschatzl
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17755
diff
changeset
|
5327 |
a07bea31ef35
8035398: Add card redirty time in "Other" time in G1
tschatzl
parents:
17755
diff
changeset
|
5328 void G1CollectedHeap::redirty_logged_cards() { |
a07bea31ef35
8035398: Add card redirty time in "Other" time in G1
tschatzl
parents:
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diff
changeset
|
5329 guarantee(G1DeferredRSUpdate, "Must only be called when using deferred RS updates."); |
a07bea31ef35
8035398: Add card redirty time in "Other" time in G1
tschatzl
parents:
17755
diff
changeset
|
5330 double redirty_logged_cards_start = os::elapsedTime(); |
a07bea31ef35
8035398: Add card redirty time in "Other" time in G1
tschatzl
parents:
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diff
changeset
|
5331 |
a07bea31ef35
8035398: Add card redirty time in "Other" time in G1
tschatzl
parents:
17755
diff
changeset
|
5332 RedirtyLoggedCardTableEntryFastClosure redirty; |
a07bea31ef35
8035398: Add card redirty time in "Other" time in G1
tschatzl
parents:
17755
diff
changeset
|
5333 dirty_card_queue_set().set_closure(&redirty); |
a07bea31ef35
8035398: Add card redirty time in "Other" time in G1
tschatzl
parents:
17755
diff
changeset
|
5334 dirty_card_queue_set().apply_closure_to_all_completed_buffers(); |
a07bea31ef35
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tschatzl
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diff
changeset
|
5335 |
a07bea31ef35
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tschatzl
parents:
17755
diff
changeset
|
5336 DirtyCardQueueSet& dcq = JavaThread::dirty_card_queue_set(); |
a07bea31ef35
8035398: Add card redirty time in "Other" time in G1
tschatzl
parents:
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diff
changeset
|
5337 dcq.merge_bufferlists(&dirty_card_queue_set()); |
a07bea31ef35
8035398: Add card redirty time in "Other" time in G1
tschatzl
parents:
17755
diff
changeset
|
5338 assert(dirty_card_queue_set().completed_buffers_num() == 0, "All should be consumed"); |
a07bea31ef35
8035398: Add card redirty time in "Other" time in G1
tschatzl
parents:
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diff
changeset
|
5339 |
a07bea31ef35
8035398: Add card redirty time in "Other" time in G1
tschatzl
parents:
17755
diff
changeset
|
5340 g1_policy()->phase_times()->record_redirty_logged_cards_time_ms((os::elapsedTime() - redirty_logged_cards_start) * 1000.0); |
a07bea31ef35
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tschatzl
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diff
changeset
|
5341 } |
a07bea31ef35
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tschatzl
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17755
diff
changeset
|
5342 |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5343 // Weak Reference Processing support |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5344 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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diff
changeset
|
5345 // An always "is_alive" closure that is used to preserve referents. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5346 // If the object is non-null then it's alive. Used in the preservation |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5347 // of referent objects that are pointed to by reference objects |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5348 // discovered by the CM ref processor. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5349 class G1AlwaysAliveClosure: public BoolObjectClosure { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5350 G1CollectedHeap* _g1; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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3973
diff
changeset
|
5351 public: |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5352 G1AlwaysAliveClosure(G1CollectedHeap* g1) : _g1(g1) {} |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5353 bool do_object_b(oop p) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5354 if (p != NULL) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5355 return true; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5356 } |
4dfb2df418f2
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diff
changeset
|
5357 return false; |
4dfb2df418f2
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parents:
3973
diff
changeset
|
5358 } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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diff
changeset
|
5359 }; |
4dfb2df418f2
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diff
changeset
|
5360 |
4dfb2df418f2
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johnc
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3973
diff
changeset
|
5361 bool G1STWIsAliveClosure::do_object_b(oop p) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5362 // An object is reachable if it is outside the collection set, |
4dfb2df418f2
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johnc
parents:
3973
diff
changeset
|
5363 // or is inside and copied. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5364 return !_g1->obj_in_cs(p) || p->is_forwarded(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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3973
diff
changeset
|
5365 } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5366 |
4dfb2df418f2
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3973
diff
changeset
|
5367 // Non Copying Keep Alive closure |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5368 class G1KeepAliveClosure: public OopClosure { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5369 G1CollectedHeap* _g1; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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3973
diff
changeset
|
5370 public: |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5371 G1KeepAliveClosure(G1CollectedHeap* g1) : _g1(g1) {} |
4dfb2df418f2
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johnc
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3973
diff
changeset
|
5372 void do_oop(narrowOop* p) { guarantee(false, "Not needed"); } |
4dfb2df418f2
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3973
diff
changeset
|
5373 void do_oop( oop* p) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5374 oop obj = *p; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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diff
changeset
|
5375 |
4dfb2df418f2
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diff
changeset
|
5376 if (_g1->obj_in_cs(obj)) { |
4dfb2df418f2
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johnc
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3973
diff
changeset
|
5377 assert( obj->is_forwarded(), "invariant" ); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5378 *p = obj->forwardee(); |
4dfb2df418f2
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3973
diff
changeset
|
5379 } |
4dfb2df418f2
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3973
diff
changeset
|
5380 } |
4dfb2df418f2
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johnc
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3973
diff
changeset
|
5381 }; |
4dfb2df418f2
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diff
changeset
|
5382 |
4dfb2df418f2
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diff
changeset
|
5383 // Copying Keep Alive closure - can be called from both |
4dfb2df418f2
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parents:
3973
diff
changeset
|
5384 // serial and parallel code as long as different worker |
4dfb2df418f2
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johnc
parents:
3973
diff
changeset
|
5385 // threads utilize different G1ParScanThreadState instances |
4dfb2df418f2
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parents:
3973
diff
changeset
|
5386 // and different queues. |
4dfb2df418f2
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3973
diff
changeset
|
5387 |
4dfb2df418f2
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3973
diff
changeset
|
5388 class G1CopyingKeepAliveClosure: public OopClosure { |
4dfb2df418f2
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3973
diff
changeset
|
5389 G1CollectedHeap* _g1h; |
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5390 OopClosure* _copy_non_heap_obj_cl; |
6725
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5391 OopsInHeapRegionClosure* _copy_metadata_obj_cl; |
3979
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|
5392 G1ParScanThreadState* _par_scan_state; |
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|
5393 |
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changeset
|
5394 public: |
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|
5395 G1CopyingKeepAliveClosure(G1CollectedHeap* g1h, |
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|
5396 OopClosure* non_heap_obj_cl, |
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|
5397 OopsInHeapRegionClosure* metadata_obj_cl, |
3979
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|
5398 G1ParScanThreadState* pss): |
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|
5399 _g1h(g1h), |
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|
5400 _copy_non_heap_obj_cl(non_heap_obj_cl), |
6725
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|
5401 _copy_metadata_obj_cl(metadata_obj_cl), |
3979
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|
5402 _par_scan_state(pss) |
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|
5403 {} |
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|
5404 |
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|
5405 virtual void do_oop(narrowOop* p) { do_oop_work(p); } |
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|
5406 virtual void do_oop( oop* p) { do_oop_work(p); } |
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|
5407 |
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|
5408 template <class T> void do_oop_work(T* p) { |
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|
5409 oop obj = oopDesc::load_decode_heap_oop(p); |
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|
5410 |
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|
5411 if (_g1h->obj_in_cs(obj)) { |
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|
5412 // If the referent object has been forwarded (either copied |
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|
5413 // to a new location or to itself in the event of an |
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|
5414 // evacuation failure) then we need to update the reference |
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|
5415 // field and, if both reference and referent are in the G1 |
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|
5416 // heap, update the RSet for the referent. |
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|
5417 // |
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|
5418 // If the referent has not been forwarded then we have to keep |
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5419 // it alive by policy. Therefore we have copy the referent. |
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|
5420 // |
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|
5421 // If the reference field is in the G1 heap then we can push |
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|
5422 // on the PSS queue. When the queue is drained (after each |
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|
5423 // phase of reference processing) the object and it's followers |
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|
5424 // will be copied, the reference field set to point to the |
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|
5425 // new location, and the RSet updated. Otherwise we need to |
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5426 // use the the non-heap or metadata closures directly to copy |
10405 | 5427 // the referent object and update the pointer, while avoiding |
3979
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|
5428 // updating the RSet. |
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changeset
|
5429 |
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|
5430 if (_g1h->is_in_g1_reserved(p)) { |
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|
5431 _par_scan_state->push_on_queue(p); |
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|
5432 } else { |
17935
7384f6a12fc1
8038212: Method::is_valid_method() check has performance regression impact for stackwalking
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|
5433 assert(!Metaspace::contains((const void*)p), |
6725
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5434 err_msg("Otherwise need to call _copy_metadata_obj_cl->do_oop(p) " |
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|
5435 PTR_FORMAT, p)); |
3979
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|
5436 _copy_non_heap_obj_cl->do_oop(p); |
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|
5437 } |
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changeset
|
5438 } |
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changeset
|
5439 } |
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changeset
|
5440 }; |
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changeset
|
5441 |
4dfb2df418f2
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|
5442 // Serial drain queue closure. Called as the 'complete_gc' |
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|
5443 // closure for each discovered list in some of the |
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diff
changeset
|
5444 // reference processing phases. |
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changeset
|
5445 |
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|
5446 class G1STWDrainQueueClosure: public VoidClosure { |
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|
5447 protected: |
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diff
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|
5448 G1CollectedHeap* _g1h; |
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|
5449 G1ParScanThreadState* _par_scan_state; |
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|
5450 |
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changeset
|
5451 G1ParScanThreadState* par_scan_state() { return _par_scan_state; } |
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|
5452 |
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diff
changeset
|
5453 public: |
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diff
changeset
|
5454 G1STWDrainQueueClosure(G1CollectedHeap* g1h, G1ParScanThreadState* pss) : |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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changeset
|
5455 _g1h(g1h), |
4dfb2df418f2
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diff
changeset
|
5456 _par_scan_state(pss) |
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parents:
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diff
changeset
|
5457 { } |
4dfb2df418f2
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parents:
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diff
changeset
|
5458 |
4dfb2df418f2
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parents:
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diff
changeset
|
5459 void do_void() { |
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parents:
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diff
changeset
|
5460 G1ParScanThreadState* const pss = par_scan_state(); |
4dfb2df418f2
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parents:
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diff
changeset
|
5461 pss->trim_queue(); |
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parents:
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diff
changeset
|
5462 } |
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diff
changeset
|
5463 }; |
4dfb2df418f2
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diff
changeset
|
5464 |
4dfb2df418f2
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diff
changeset
|
5465 // Parallel Reference Processing closures |
4dfb2df418f2
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diff
changeset
|
5466 |
4dfb2df418f2
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parents:
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diff
changeset
|
5467 // Implementation of AbstractRefProcTaskExecutor for parallel reference |
4dfb2df418f2
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parents:
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diff
changeset
|
5468 // processing during G1 evacuation pauses. |
4dfb2df418f2
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parents:
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diff
changeset
|
5469 |
4dfb2df418f2
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diff
changeset
|
5470 class G1STWRefProcTaskExecutor: public AbstractRefProcTaskExecutor { |
4dfb2df418f2
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parents:
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diff
changeset
|
5471 private: |
4dfb2df418f2
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parents:
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diff
changeset
|
5472 G1CollectedHeap* _g1h; |
4dfb2df418f2
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diff
changeset
|
5473 RefToScanQueueSet* _queues; |
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
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4090
diff
changeset
|
5474 FlexibleWorkGang* _workers; |
3979
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parents:
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diff
changeset
|
5475 int _active_workers; |
4dfb2df418f2
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parents:
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diff
changeset
|
5476 |
4dfb2df418f2
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diff
changeset
|
5477 public: |
4dfb2df418f2
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parents:
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diff
changeset
|
5478 G1STWRefProcTaskExecutor(G1CollectedHeap* g1h, |
4095
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diff
changeset
|
5479 FlexibleWorkGang* workers, |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5480 RefToScanQueueSet *task_queues, |
4dfb2df418f2
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parents:
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diff
changeset
|
5481 int n_workers) : |
4dfb2df418f2
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parents:
3973
diff
changeset
|
5482 _g1h(g1h), |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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diff
changeset
|
5483 _queues(task_queues), |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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3973
diff
changeset
|
5484 _workers(workers), |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5485 _active_workers(n_workers) |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5486 { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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diff
changeset
|
5487 assert(n_workers > 0, "shouldn't call this otherwise"); |
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diff
changeset
|
5488 } |
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diff
changeset
|
5489 |
4dfb2df418f2
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diff
changeset
|
5490 // Executes the given task using concurrent marking worker threads. |
4dfb2df418f2
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diff
changeset
|
5491 virtual void execute(ProcessTask& task); |
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diff
changeset
|
5492 virtual void execute(EnqueueTask& task); |
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diff
changeset
|
5493 }; |
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diff
changeset
|
5494 |
4dfb2df418f2
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diff
changeset
|
5495 // Gang task for possibly parallel reference processing |
4dfb2df418f2
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diff
changeset
|
5496 |
4dfb2df418f2
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diff
changeset
|
5497 class G1STWRefProcTaskProxy: public AbstractGangTask { |
4dfb2df418f2
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diff
changeset
|
5498 typedef AbstractRefProcTaskExecutor::ProcessTask ProcessTask; |
4dfb2df418f2
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parents:
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diff
changeset
|
5499 ProcessTask& _proc_task; |
4dfb2df418f2
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diff
changeset
|
5500 G1CollectedHeap* _g1h; |
4dfb2df418f2
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3973
diff
changeset
|
5501 RefToScanQueueSet *_task_queues; |
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diff
changeset
|
5502 ParallelTaskTerminator* _terminator; |
4dfb2df418f2
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diff
changeset
|
5503 |
4dfb2df418f2
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3973
diff
changeset
|
5504 public: |
4dfb2df418f2
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3973
diff
changeset
|
5505 G1STWRefProcTaskProxy(ProcessTask& proc_task, |
4dfb2df418f2
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parents:
3973
diff
changeset
|
5506 G1CollectedHeap* g1h, |
4dfb2df418f2
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3973
diff
changeset
|
5507 RefToScanQueueSet *task_queues, |
4dfb2df418f2
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3973
diff
changeset
|
5508 ParallelTaskTerminator* terminator) : |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5509 AbstractGangTask("Process reference objects in parallel"), |
4dfb2df418f2
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3973
diff
changeset
|
5510 _proc_task(proc_task), |
4dfb2df418f2
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3973
diff
changeset
|
5511 _g1h(g1h), |
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diff
changeset
|
5512 _task_queues(task_queues), |
4dfb2df418f2
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diff
changeset
|
5513 _terminator(terminator) |
4dfb2df418f2
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diff
changeset
|
5514 {} |
4dfb2df418f2
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diff
changeset
|
5515 |
4728
441e946dc1af
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4711
diff
changeset
|
5516 virtual void work(uint worker_id) { |
3979
4dfb2df418f2
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parents:
3973
diff
changeset
|
5517 // The reference processing task executed by a single worker. |
4dfb2df418f2
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parents:
3973
diff
changeset
|
5518 ResourceMark rm; |
4dfb2df418f2
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parents:
3973
diff
changeset
|
5519 HandleMark hm; |
4dfb2df418f2
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parents:
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diff
changeset
|
5520 |
4dfb2df418f2
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diff
changeset
|
5521 G1STWIsAliveClosure is_alive(_g1h); |
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changeset
|
5522 |
17689
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8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
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|
5523 G1ParScanThreadState pss(_g1h, worker_id, NULL); |
3979
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|
5524 G1ParScanHeapEvacFailureClosure evac_failure_cl(_g1h, &pss, NULL); |
17759
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|
5525 |
3979
4dfb2df418f2
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|
5526 pss.set_evac_failure_closure(&evac_failure_cl); |
4dfb2df418f2
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|
5527 |
4dfb2df418f2
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diff
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|
5528 G1ParScanExtRootClosure only_copy_non_heap_cl(_g1h, &pss, NULL); |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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|
5529 G1ParScanMetadataClosure only_copy_metadata_cl(_g1h, &pss, NULL); |
3979
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changeset
|
5530 |
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6484982: G1: process references during evacuation pauses
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diff
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|
5531 G1ParScanAndMarkExtRootClosure copy_mark_non_heap_cl(_g1h, &pss, NULL); |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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|
5532 G1ParScanAndMarkMetadataClosure copy_mark_metadata_cl(_g1h, &pss, NULL); |
3979
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6484982: G1: process references during evacuation pauses
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|
5533 |
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6484982: G1: process references during evacuation pauses
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diff
changeset
|
5534 OopClosure* copy_non_heap_cl = &only_copy_non_heap_cl; |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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6629
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|
5535 OopsInHeapRegionClosure* copy_metadata_cl = &only_copy_metadata_cl; |
3979
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6484982: G1: process references during evacuation pauses
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changeset
|
5536 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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diff
changeset
|
5537 if (_g1h->g1_policy()->during_initial_mark_pause()) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
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|
5538 // We also need to mark copied objects. |
4dfb2df418f2
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diff
changeset
|
5539 copy_non_heap_cl = ©_mark_non_heap_cl; |
6725
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|
5540 copy_metadata_cl = ©_mark_metadata_cl; |
3979
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6484982: G1: process references during evacuation pauses
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parents:
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diff
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|
5541 } |
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diff
changeset
|
5542 |
4dfb2df418f2
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diff
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|
5543 // Keep alive closure. |
6725
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coleenp
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|
5544 G1CopyingKeepAliveClosure keep_alive(_g1h, copy_non_heap_cl, copy_metadata_cl, &pss); |
3979
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|
5545 |
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6484982: G1: process references during evacuation pauses
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diff
changeset
|
5546 // Complete GC closure |
4dfb2df418f2
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changeset
|
5547 G1ParEvacuateFollowersClosure drain_queue(_g1h, &pss, _task_queues, _terminator); |
4dfb2df418f2
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|
5548 |
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diff
changeset
|
5549 // Call the reference processing task's work routine. |
4728
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|
5550 _proc_task.work(worker_id, is_alive, keep_alive, drain_queue); |
3979
4dfb2df418f2
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|
5551 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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diff
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|
5552 // Note we cannot assert that the refs array is empty here as not all |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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|
5553 // of the processing tasks (specifically phase2 - pp2_work) execute |
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|
5554 // the complete_gc closure (which ordinarily would drain the queue) so |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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|
5555 // the queue may not be empty. |
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parents:
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diff
changeset
|
5556 } |
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6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5557 }; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5558 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5559 // Driver routine for parallel reference processing. |
4dfb2df418f2
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parents:
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diff
changeset
|
5560 // Creates an instance of the ref processing gang |
4dfb2df418f2
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parents:
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diff
changeset
|
5561 // task and has the worker threads execute it. |
4dfb2df418f2
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parents:
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diff
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|
5562 void G1STWRefProcTaskExecutor::execute(ProcessTask& proc_task) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5563 assert(_workers != NULL, "Need parallel worker threads."); |
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6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5564 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5565 ParallelTaskTerminator terminator(_active_workers, _queues); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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changeset
|
5566 G1STWRefProcTaskProxy proc_task_proxy(proc_task, _g1h, _queues, &terminator); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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changeset
|
5567 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5568 _g1h->set_par_threads(_active_workers); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5569 _workers->run_task(&proc_task_proxy); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5570 _g1h->set_par_threads(0); |
4dfb2df418f2
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parents:
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diff
changeset
|
5571 } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5572 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5573 // Gang task for parallel reference enqueueing. |
4dfb2df418f2
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parents:
3973
diff
changeset
|
5574 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5575 class G1STWRefEnqueueTaskProxy: public AbstractGangTask { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5576 typedef AbstractRefProcTaskExecutor::EnqueueTask EnqueueTask; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5577 EnqueueTask& _enq_task; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5578 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5579 public: |
4dfb2df418f2
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johnc
parents:
3973
diff
changeset
|
5580 G1STWRefEnqueueTaskProxy(EnqueueTask& enq_task) : |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5581 AbstractGangTask("Enqueue reference objects in parallel"), |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5582 _enq_task(enq_task) |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5583 { } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5584 |
4728
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7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
5585 virtual void work(uint worker_id) { |
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
5586 _enq_task.work(worker_id); |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5587 } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5588 }; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5589 |
10405 | 5590 // Driver routine for parallel reference enqueueing. |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5591 // Creates an instance of the ref enqueueing gang |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5592 // task and has the worker threads execute it. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5593 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5594 void G1STWRefProcTaskExecutor::execute(EnqueueTask& enq_task) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5595 assert(_workers != NULL, "Need parallel worker threads."); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5596 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5597 G1STWRefEnqueueTaskProxy enq_task_proxy(enq_task); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5598 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5599 _g1h->set_par_threads(_active_workers); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5600 _workers->run_task(&enq_task_proxy); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5601 _g1h->set_par_threads(0); |
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 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5604 // End of weak reference support closures |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5605 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5606 // Abstract task used to preserve (i.e. copy) any referent objects |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5607 // that are in the collection set and are pointed to by reference |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5608 // objects discovered by the CM ref processor. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5609 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5610 class G1ParPreserveCMReferentsTask: public AbstractGangTask { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5611 protected: |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5612 G1CollectedHeap* _g1h; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5613 RefToScanQueueSet *_queues; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5614 ParallelTaskTerminator _terminator; |
4728
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7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
5615 uint _n_workers; |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5616 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5617 public: |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5618 G1ParPreserveCMReferentsTask(G1CollectedHeap* g1h,int workers, RefToScanQueueSet *task_queues) : |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5619 AbstractGangTask("ParPreserveCMReferents"), |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5620 _g1h(g1h), |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5621 _queues(task_queues), |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5622 _terminator(workers, _queues), |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5623 _n_workers(workers) |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5624 { } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5625 |
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
5626 void work(uint worker_id) { |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5627 ResourceMark rm; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5628 HandleMark hm; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5629 |
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
5630 G1ParScanThreadState pss(_g1h, worker_id, NULL); |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5631 G1ParScanHeapEvacFailureClosure evac_failure_cl(_g1h, &pss, NULL); |
17759
bc22cbb8b45a
8035330: Remove G1ParScanPartialArrayClosure and G1ParScanHeapEvacClosure
tschatzl
parents:
17758
diff
changeset
|
5632 |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5633 pss.set_evac_failure_closure(&evac_failure_cl); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5634 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5635 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
|
5636 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5637 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5638 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
|
5639 G1ParScanMetadataClosure only_copy_metadata_cl(_g1h, &pss, NULL); |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5640 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5641 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
|
5642 G1ParScanAndMarkMetadataClosure copy_mark_metadata_cl(_g1h, &pss, NULL); |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5643 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5644 OopClosure* copy_non_heap_cl = &only_copy_non_heap_cl; |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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6629
diff
changeset
|
5645 OopsInHeapRegionClosure* copy_metadata_cl = &only_copy_metadata_cl; |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5646 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5647 if (_g1h->g1_policy()->during_initial_mark_pause()) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5648 // We also need to mark copied objects. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5649 copy_non_heap_cl = ©_mark_non_heap_cl; |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
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|
5650 copy_metadata_cl = ©_mark_metadata_cl; |
3979
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6484982: G1: process references during evacuation pauses
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3973
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|
5651 } |
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6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5652 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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diff
changeset
|
5653 // Is alive closure |
4dfb2df418f2
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parents:
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diff
changeset
|
5654 G1AlwaysAliveClosure always_alive(_g1h); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5655 |
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6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5656 // Copying keep alive closure. Applied to referent objects that need |
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parents:
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diff
changeset
|
5657 // to be copied. |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5658 G1CopyingKeepAliveClosure keep_alive(_g1h, copy_non_heap_cl, copy_metadata_cl, &pss); |
3979
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6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5659 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5660 ReferenceProcessor* rp = _g1h->ref_processor_cm(); |
4dfb2df418f2
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parents:
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diff
changeset
|
5661 |
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
5662 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
|
5663 uint stride = MIN2(MAX2(_n_workers, 1U), limit); |
3979
4dfb2df418f2
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parents:
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diff
changeset
|
5664 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5665 // 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:
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diff
changeset
|
5666 // 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
|
5667 // change the worker ids. |
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
5668 assert(0 <= worker_id && worker_id < limit, "sanity"); |
3979
4dfb2df418f2
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parents:
3973
diff
changeset
|
5669 assert(!rp->discovery_is_atomic(), "check this code"); |
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6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5670 |
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6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5671 // 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
|
5672 for (uint idx = worker_id; idx < limit; idx += stride) { |
4014
bf2d2b8b1726
7095243: Disambiguate ReferenceProcessor::_discoveredSoftRefs
johnc
parents:
4013
diff
changeset
|
5673 DiscoveredList& ref_list = rp->discovered_refs()[idx]; |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5674 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5675 DiscoveredListIterator iter(ref_list, &keep_alive, &always_alive); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5676 while (iter.has_next()) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5677 // 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
|
5678 // can see some null referent objects. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5679 iter.load_ptrs(DEBUG_ONLY(true)); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5680 oop ref = iter.obj(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5681 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5682 // This will filter nulls. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5683 if (iter.is_referent_alive()) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5684 iter.make_referent_alive(); |
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 iter.move_to_next(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5687 } |
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 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5690 // Drain the queue - which may cause stealing |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5691 G1ParEvacuateFollowersClosure drain_queue(_g1h, &pss, _queues, &_terminator); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5692 drain_queue.do_void(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5693 // Allocation buffers were retired at the end of G1ParEvacuateFollowersClosure |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5694 assert(pss.refs()->is_empty(), "should be"); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5695 } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5696 }; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5697 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5698 // Weak Reference processing during an evacuation pause (part 1). |
6819 | 5699 void G1CollectedHeap::process_discovered_references(uint no_of_gc_workers) { |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5700 double ref_proc_start = os::elapsedTime(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5701 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5702 ReferenceProcessor* rp = _ref_processor_stw; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5703 assert(rp->discovery_enabled(), "should have been enabled"); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5704 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5705 // Any reference objects, in the collection set, that were 'discovered' |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5706 // 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
|
5707 // applying the external root copy closure to the discovered lists, or |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5708 // by following an RSet entry). |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5709 // |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5710 // 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
|
5711 // 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
|
5712 // processor would have seen that the reference object had already |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5713 // been 'discovered' and would have skipped discovering the reference, |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5714 // but would not have treated the reference object as a regular oop. |
10405 | 5715 // 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
|
5716 // referent object. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5717 // |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5718 // We need to explicitly copy these referent objects - the references |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5719 // will be processed at the end of remarking. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5720 // |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5721 // 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
|
5722 // 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
|
5723 // referents points to another object which is also referenced by an |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5724 // object discovered by the STW ref processor. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5725 |
4711 | 5726 assert(!G1CollectedHeap::use_parallel_gc_threads() || |
6819 | 5727 no_of_gc_workers == workers()->active_workers(), |
5728 "Need to reset active GC workers"); | |
5729 | |
5730 set_par_threads(no_of_gc_workers); | |
5731 G1ParPreserveCMReferentsTask keep_cm_referents(this, | |
5732 no_of_gc_workers, | |
5733 _task_queues); | |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5734 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5735 if (G1CollectedHeap::use_parallel_gc_threads()) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5736 workers()->run_task(&keep_cm_referents); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5737 } else { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5738 keep_cm_referents.work(0); |
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 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5741 set_par_threads(0); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5742 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5743 // Closure to test whether a referent is alive. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5744 G1STWIsAliveClosure is_alive(this); |
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 // Even when parallel reference processing is enabled, the processing |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5747 // 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
|
5748 // 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
|
5749 // JNI refs. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5750 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5751 // Use only a single queue for this PSS. |
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
5752 G1ParScanThreadState pss(this, 0, NULL); |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5753 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5754 // We do not embed a reference processor in the copying/scanning |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5755 // closures while we're actually processing the discovered |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5756 // reference objects. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5757 G1ParScanHeapEvacFailureClosure evac_failure_cl(this, &pss, NULL); |
17759
bc22cbb8b45a
8035330: Remove G1ParScanPartialArrayClosure and G1ParScanHeapEvacClosure
tschatzl
parents:
17758
diff
changeset
|
5758 |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5759 pss.set_evac_failure_closure(&evac_failure_cl); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5760 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5761 assert(pss.refs()->is_empty(), "pre-condition"); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5762 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5763 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
|
5764 G1ParScanMetadataClosure only_copy_metadata_cl(this, &pss, NULL); |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5765 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5766 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
|
5767 G1ParScanAndMarkMetadataClosure copy_mark_metadata_cl(this, &pss, NULL); |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5768 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5769 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
|
5770 OopsInHeapRegionClosure* copy_metadata_cl = &only_copy_metadata_cl; |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5771 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5772 if (_g1h->g1_policy()->during_initial_mark_pause()) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5773 // We also need to mark copied objects. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5774 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
|
5775 copy_metadata_cl = ©_mark_metadata_cl; |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5776 } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5777 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5778 // Keep alive closure. |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5779 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
|
5780 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5781 // Serial Complete GC closure |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5782 G1STWDrainQueueClosure drain_queue(this, &pss); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5783 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5784 // Setup the soft refs policy... |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5785 rp->setup_policy(false); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5786 |
10405 | 5787 ReferenceProcessorStats stats; |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5788 if (!rp->processing_is_mt()) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5789 // Serial reference processing... |
10405 | 5790 stats = rp->process_discovered_references(&is_alive, |
5791 &keep_alive, | |
5792 &drain_queue, | |
5793 NULL, | |
5794 _gc_timer_stw); | |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5795 } else { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5796 // Parallel reference processing |
6819 | 5797 assert(rp->num_q() == no_of_gc_workers, "sanity"); |
5798 assert(no_of_gc_workers <= rp->max_num_q(), "sanity"); | |
5799 | |
5800 G1STWRefProcTaskExecutor par_task_executor(this, workers(), _task_queues, no_of_gc_workers); | |
10405 | 5801 stats = rp->process_discovered_references(&is_alive, |
5802 &keep_alive, | |
5803 &drain_queue, | |
5804 &par_task_executor, | |
5805 _gc_timer_stw); | |
5806 } | |
5807 | |
5808 _gc_tracer_stw->report_gc_reference_stats(stats); | |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5809 // We have completed copying any necessary live referent objects |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5810 // (that were not copied during the actual pause) so we can |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5811 // retire any active alloc buffers |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5812 pss.retire_alloc_buffers(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5813 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
|
5814 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5815 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
|
5816 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
|
5817 } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5818 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5819 // Weak Reference processing during an evacuation pause (part 2). |
6819 | 5820 void G1CollectedHeap::enqueue_discovered_references(uint no_of_gc_workers) { |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5821 double ref_enq_start = os::elapsedTime(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5822 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5823 ReferenceProcessor* rp = _ref_processor_stw; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5824 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
|
5825 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5826 // Now enqueue any remaining on the discovered lists on to |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5827 // the pending list. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5828 if (!rp->processing_is_mt()) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5829 // Serial reference processing... |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5830 rp->enqueue_discovered_references(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5831 } else { |
10405 | 5832 // Parallel reference enqueueing |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5833 |
6819 | 5834 assert(no_of_gc_workers == workers()->active_workers(), |
5835 "Need to reset active workers"); | |
5836 assert(rp->num_q() == no_of_gc_workers, "sanity"); | |
5837 assert(no_of_gc_workers <= rp->max_num_q(), "sanity"); | |
5838 | |
5839 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
|
5840 rp->enqueue_discovered_references(&par_task_executor); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5841 } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5842 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5843 rp->verify_no_references_recorded(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5844 assert(!rp->discovery_enabled(), "should have been disabled"); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5845 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5846 // FIXME |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5847 // 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
|
5848 // Should we do that here also? We could, but it is a serial operation |
10405 | 5849 // and could significantly increase the pause time. |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5850 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5851 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
|
5852 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
|
5853 } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5854 |
10405 | 5855 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
|
5856 _expand_heap_after_alloc_failure = true; |
10405 | 5857 _evacuation_failed = false; |
342 | 5858 |
6629
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
5859 // 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
|
5860 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
|
5861 |
342 | 5862 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
|
5863 |
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
10242
diff
changeset
|
5864 // Disable the hot card cache. |
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
10242
diff
changeset
|
5865 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
|
5866 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
|
5867 hot_card_cache->set_use_cache(false); |
889 | 5868 |
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
5869 uint n_workers; |
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5870 if (G1CollectedHeap::use_parallel_gc_threads()) { |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5871 n_workers = |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5872 AdaptiveSizePolicy::calc_active_workers(workers()->total_workers(), |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5873 workers()->active_workers(), |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5874 Threads::number_of_non_daemon_threads()); |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5875 assert(UseDynamicNumberOfGCThreads || |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5876 n_workers == workers()->total_workers(), |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5877 "If not dynamic should be using all the workers"); |
4711 | 5878 workers()->set_active_workers(n_workers); |
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5879 set_par_threads(n_workers); |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5880 } else { |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5881 assert(n_par_threads() == 0, |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5882 "Should be the original non-parallel value"); |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5883 n_workers = 1; |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5884 } |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5885 |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5886 G1ParTask g1_par_task(this, _task_queues); |
342 | 5887 |
5888 init_for_evac_failure(NULL); | |
5889 | |
5890 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
|
5891 |
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
5892 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
|
5893 double start_par_time_sec = os::elapsedTime(); |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5894 double end_par_time_sec; |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5895 |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5896 { |
989
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
890
diff
changeset
|
5897 StrongRootsScope srs(this); |
5986
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5898 |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5899 if (G1CollectedHeap::use_parallel_gc_threads()) { |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5900 // 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
|
5901 if (ParallelGCVerbose) G1ParScanThreadState::print_termination_stats_hdr(); |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5902 // These tasks use ShareHeap::_process_strong_tasks |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5903 assert(UseDynamicNumberOfGCThreads || |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5904 workers()->active_workers() == workers()->total_workers(), |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5905 "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
|
5906 workers()->run_task(&g1_par_task); |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5907 } else { |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5908 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
|
5909 g1_par_task.work(0); |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5910 } |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5911 end_par_time_sec = os::elapsedTime(); |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5912 |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5913 // 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
|
5914 // 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
|
5915 // 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
|
5916 // 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
|
5917 // reported parallel time. |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5918 } |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5919 |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5920 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
|
5921 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
|
5922 |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5923 double code_root_fixup_time_ms = |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5924 (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
|
5925 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
|
5926 |
342 | 5927 set_par_threads(0); |
1974
fd1d227ef1b9
6983204: G1: Nightly test nsk/regression/b4958615 failing with +ExplicitGCInvokesConcurrent
johnc
parents:
1973
diff
changeset
|
5928 |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5929 // Process any discovered reference objects - we have |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5930 // to do this _before_ we retire the GC alloc regions |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5931 // as we may have to copy some 'reachable' referent |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5932 // objects (and their reachable sub-graphs) that were |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5933 // not copied during the pause. |
6819 | 5934 process_discovered_references(n_workers); |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5935 |
1974
fd1d227ef1b9
6983204: G1: Nightly test nsk/regression/b4958615 failing with +ExplicitGCInvokesConcurrent
johnc
parents:
1973
diff
changeset
|
5936 // Weak root processing. |
342 | 5937 { |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5938 G1STWIsAliveClosure is_alive(this); |
342 | 5939 G1KeepAliveClosure keep_alive(this); |
5940 JNIHandles::weak_oops_do(&is_alive, &keep_alive); | |
17764 | 5941 if (G1StringDedup::is_enabled()) { |
5942 G1StringDedup::unlink_or_oops_do(&is_alive, &keep_alive); | |
5943 } | |
342 | 5944 } |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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3973
diff
changeset
|
5945 |
10405 | 5946 release_gc_alloc_regions(n_workers, evacuation_info); |
342 | 5947 g1_rem_set()->cleanup_after_oops_into_collection_set_do(); |
616
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
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diff
changeset
|
5948 |
10246
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
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10242
diff
changeset
|
5949 // Reset and re-enable the hot card cache. |
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
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10242
diff
changeset
|
5950 // 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
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10242
diff
changeset
|
5951 // 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
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10242
diff
changeset
|
5952 hot_card_cache->reset_hot_cache(); |
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
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10242
diff
changeset
|
5953 hot_card_cache->set_use_cache(true); |
342 | 5954 |
12080 | 5955 // Migrate the strong code roots attached to each region in |
5956 // the collection set. Ideally we would like to do this | |
5957 // after we have finished the scanning/evacuation of the | |
5958 // strong code roots for a particular heap region. | |
5959 migrate_strong_code_roots(); | |
5960 | |
17753
191174b49bec
8035406: Improve data structure for Code Cache remembered sets
tschatzl
parents:
17749
diff
changeset
|
5961 purge_code_root_memory(); |
191174b49bec
8035406: Improve data structure for Code Cache remembered sets
tschatzl
parents:
17749
diff
changeset
|
5962 |
12080 | 5963 if (g1_policy()->during_initial_mark_pause()) { |
5964 // Reset the claim values set during marking the strong code roots | |
5965 reset_heap_region_claim_values(); | |
5966 } | |
5967 | |
342 | 5968 finalize_for_evac_failure(); |
5969 | |
5970 if (evacuation_failed()) { | |
5971 remove_self_forwarding_pointers(); | |
6629
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
5972 |
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
5973 // Reset the G1EvacuationFailureALot counters and flags |
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
5974 // 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
|
5975 // evacuation failure occurs. |
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
5976 NOT_PRODUCT(reset_evacuation_should_fail();) |
342 | 5977 } |
5978 | |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5979 // Enqueue any remaining references remaining on the STW |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5980 // reference processor's discovered lists. We need to do |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5981 // this after the card table is cleaned (and verified) as |
10405 | 5982 // the act of enqueueing entries on to the pending list |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5983 // will log these updates (and dirty their associated |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5984 // cards). We need these updates logged to update any |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5985 // RSets. |
6819 | 5986 enqueue_discovered_references(n_workers); |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5987 |
616
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
5988 if (G1DeferredRSUpdate) { |
17756
a07bea31ef35
8035398: Add card redirty time in "Other" time in G1
tschatzl
parents:
17755
diff
changeset
|
5989 redirty_logged_cards(); |
616
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
5990 } |
342 | 5991 COMPILER2_PRESENT(DerivedPointerTable::update_pointers()); |
5992 } | |
5993 | |
2152 | 5994 void G1CollectedHeap::free_region(HeapRegion* hr, |
5995 FreeRegionList* free_list, | |
17755
96b1c2e06e25
8027295: Free CSet takes ~50% of young pause time
tschatzl
parents:
17753
diff
changeset
|
5996 bool par, |
96b1c2e06e25
8027295: Free CSet takes ~50% of young pause time
tschatzl
parents:
17753
diff
changeset
|
5997 bool locked) { |
2152 | 5998 assert(!hr->isHumongous(), "this is only for non-humongous regions"); |
5999 assert(!hr->is_empty(), "the region should not be empty"); | |
6000 assert(free_list != NULL, "pre-condition"); | |
6001 | |
10246
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
10242
diff
changeset
|
6002 // 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
|
6003 // 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
|
6004 // (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
|
6005 if (!hr->is_young()) { |
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
10242
diff
changeset
|
6006 _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
|
6007 } |
17755
96b1c2e06e25
8027295: Free CSet takes ~50% of young pause time
tschatzl
parents:
17753
diff
changeset
|
6008 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
|
6009 free_list->add_ordered(hr); |
2152 | 6010 } |
6011 | |
6012 void G1CollectedHeap::free_humongous_region(HeapRegion* hr, | |
6013 FreeRegionList* free_list, | |
6014 bool par) { | |
6015 assert(hr->startsHumongous(), "this is only for starts humongous regions"); | |
6016 assert(free_list != NULL, "pre-condition"); | |
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6017 |
2152 | 6018 size_t hr_capacity = hr->capacity(); |
6254
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
6019 // 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
|
6020 // otherwise the information will be gone. |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
6021 uint last_index = hr->last_hc_index(); |
2152 | 6022 hr->set_notHumongous(); |
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6023 free_region(hr, free_list, par); |
2152 | 6024 |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
6025 uint i = hr->hrs_index() + 1; |
6254
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
6026 while (i < last_index) { |
3766 | 6027 HeapRegion* curr_hr = region_at(i); |
6254
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
6028 assert(curr_hr->continuesHumongous(), "invariant"); |
2152 | 6029 curr_hr->set_notHumongous(); |
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6030 free_region(curr_hr, free_list, par); |
2152 | 6031 i += 1; |
6032 } | |
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6033 } |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6034 |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6035 void G1CollectedHeap::remove_from_old_sets(const HeapRegionSetCount& old_regions_removed, |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6036 const HeapRegionSetCount& humongous_regions_removed) { |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6037 if (old_regions_removed.length() > 0 || humongous_regions_removed.length() > 0) { |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6038 MutexLockerEx x(OldSets_lock, Mutex::_no_safepoint_check_flag); |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6039 _old_set.bulk_remove(old_regions_removed); |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6040 _humongous_set.bulk_remove(humongous_regions_removed); |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6041 } |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6042 |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6043 } |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6044 |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6045 void G1CollectedHeap::prepend_to_freelist(FreeRegionList* list) { |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6046 assert(list != NULL, "list can't be null"); |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6047 if (!list->is_empty()) { |
2152 | 6048 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
|
6049 _free_list.add_ordered(list); |
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6050 } |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6051 } |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6052 |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6053 void G1CollectedHeap::decrement_summary_bytes(size_t bytes) { |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6054 assert(_summary_bytes_used >= bytes, |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6055 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
|
6056 _summary_bytes_used, bytes)); |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6057 _summary_bytes_used -= bytes; |
342 | 6058 } |
6059 | |
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6060 class G1ParCleanupCTTask : public AbstractGangTask { |
12343 | 6061 G1SATBCardTableModRefBS* _ct_bs; |
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6062 G1CollectedHeap* _g1h; |
940
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
6063 HeapRegion* volatile _su_head; |
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6064 public: |
12343 | 6065 G1ParCleanupCTTask(G1SATBCardTableModRefBS* ct_bs, |
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6066 G1CollectedHeap* g1h) : |
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6067 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
|
6068 _ct_bs(ct_bs), _g1h(g1h) { } |
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6069 |
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
6070 void work(uint worker_id) { |
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6071 HeapRegion* r; |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6072 while (r = _g1h->pop_dirty_cards_region()) { |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6073 clear_cards(r); |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6074 } |
940
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
6075 } |
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
6076 |
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6077 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
|
6078 // 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
|
6079 if (!r->is_survivor()) { |
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6080 _ct_bs->clear(MemRegion(r->bottom(), r->end())); |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6081 } |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6082 } |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6083 }; |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6084 |
940
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
6085 #ifndef PRODUCT |
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
6086 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
|
6087 G1CollectedHeap* _g1h; |
12343 | 6088 G1SATBCardTableModRefBS* _ct_bs; |
940
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
6089 public: |
12343 | 6090 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
|
6091 : _g1h(g1h), _ct_bs(ct_bs) { } |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6092 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
|
6093 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
|
6094 _g1h->verify_dirty_region(r); |
940
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
6095 } else { |
3317
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
6096 _g1h->verify_not_dirty_region(r); |
940
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
6097 } |
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
6098 return false; |
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
6099 } |
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
6100 }; |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6101 |
3317
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
6102 void G1CollectedHeap::verify_not_dirty_region(HeapRegion* hr) { |
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
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|
6103 // All of the region should be clean. |
12343 | 6104 G1SATBCardTableModRefBS* ct_bs = g1_barrier_set(); |
3317
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7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
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|
6105 MemRegion mr(hr->bottom(), hr->end()); |
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
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|
6106 ct_bs->verify_not_dirty_region(mr); |
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
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|
6107 } |
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
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|
6108 |
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
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|
6109 void G1CollectedHeap::verify_dirty_region(HeapRegion* hr) { |
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
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|
6110 // We cannot guarantee that [bottom(),end()] is dirty. Threads |
063382f9b575
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|
6111 // dirty allocated blocks as they allocate them. The thread that |
063382f9b575
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|
6112 // retires each region and replaces it with a new one will do a |
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
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|
6113 // maximal allocation to fill in [pre_dummy_top(),end()] but will |
063382f9b575
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|
6114 // not dirty that area (one less thing to have to do while holding |
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
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|
6115 // a lock). So we can only verify that [bottom(),pre_dummy_top()] |
063382f9b575
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|
6116 // is dirty. |
12343 | 6117 G1SATBCardTableModRefBS* ct_bs = g1_barrier_set(); |
3317
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|
6118 MemRegion mr(hr->bottom(), hr->pre_dummy_top()); |
12835
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8014555: G1: Memory ordering problem with Conc refinement and card marking
mgerdin
parents:
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diff
changeset
|
6119 if (hr->is_young()) { |
69944b868a32
8014555: G1: Memory ordering problem with Conc refinement and card marking
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|
6120 ct_bs->verify_g1_young_region(mr); |
69944b868a32
8014555: G1: Memory ordering problem with Conc refinement and card marking
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diff
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|
6121 } else { |
69944b868a32
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|
6122 ct_bs->verify_dirty_region(mr); |
69944b868a32
8014555: G1: Memory ordering problem with Conc refinement and card marking
mgerdin
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diff
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|
6123 } |
3317
063382f9b575
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|
6124 } |
063382f9b575
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|
6125 |
2433
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7023069: G1: Introduce symmetric locking in the slow allocation path
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|
6126 void G1CollectedHeap::verify_dirty_young_list(HeapRegion* head) { |
12343 | 6127 G1SATBCardTableModRefBS* ct_bs = g1_barrier_set(); |
2433
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|
6128 for (HeapRegion* hr = head; hr != NULL; hr = hr->get_next_young_region()) { |
3317
063382f9b575
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|
6129 verify_dirty_region(hr); |
2433
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|
6130 } |
abdfc822206f
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|
6131 } |
abdfc822206f
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|
6132 |
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|
6133 void G1CollectedHeap::verify_dirty_young_regions() { |
abdfc822206f
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|
6134 verify_dirty_young_list(_young_list->first_region()); |
abdfc822206f
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|
6135 } |
940
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
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|
6136 #endif |
8624da129f0b
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|
6137 |
342 | 6138 void G1CollectedHeap::cleanUpCardTable() { |
12343 | 6139 G1SATBCardTableModRefBS* ct_bs = g1_barrier_set(); |
342 | 6140 double start = os::elapsedTime(); |
6141 | |
4023 | 6142 { |
6143 // Iterate over the dirty cards region list. | |
6144 G1ParCleanupCTTask cleanup_task(ct_bs, this); | |
6145 | |
4711 | 6146 if (G1CollectedHeap::use_parallel_gc_threads()) { |
6147 set_par_threads(); | |
4023 | 6148 workers()->run_task(&cleanup_task); |
6149 set_par_threads(0); | |
6150 } else { | |
6151 while (_dirty_cards_region_list) { | |
6152 HeapRegion* r = _dirty_cards_region_list; | |
6153 cleanup_task.clear_cards(r); | |
6154 _dirty_cards_region_list = r->get_next_dirty_cards_region(); | |
6155 if (_dirty_cards_region_list == r) { | |
6156 // The last region. | |
6157 _dirty_cards_region_list = NULL; | |
6158 } | |
6159 r->set_next_dirty_cards_region(NULL); | |
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
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diff
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|
6160 } |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
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diff
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|
6161 } |
4023 | 6162 #ifndef PRODUCT |
6163 if (G1VerifyCTCleanup || VerifyAfterGC) { | |
6164 G1VerifyCardTableCleanup cleanup_verifier(this, ct_bs); | |
6165 heap_region_iterate(&cleanup_verifier); | |
6166 } | |
6167 #endif | |
940
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|
6168 } |
1394
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6819061: G1: eliminate serial Other times that are proportional to the collection set length
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|
6169 |
342 | 6170 double elapsed = os::elapsedTime() - start; |
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
6171 g1_policy()->phase_times()->record_clear_ct_time(elapsed * 1000.0); |
342 | 6172 } |
6173 | |
10405 | 6174 void G1CollectedHeap::free_collection_set(HeapRegion* cs_head, EvacuationInfo& evacuation_info) { |
2152 | 6175 size_t pre_used = 0; |
6176 FreeRegionList local_free_list("Local List for CSet Freeing"); | |
6177 | |
342 | 6178 double young_time_ms = 0.0; |
6179 double non_young_time_ms = 0.0; | |
6180 | |
1394
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6819061: G1: eliminate serial Other times that are proportional to the collection set length
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|
6181 // Since the collection set is a superset of the the young list, |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
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|
6182 // all we need to do to clear the young list is clear its |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
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|
6183 // head and length, and unlink any young regions in the code below |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
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|
6184 _young_list->clear(); |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
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|
6185 |
342 | 6186 G1CollectorPolicy* policy = g1_policy(); |
6187 | |
6188 double start_sec = os::elapsedTime(); | |
6189 bool non_young = true; | |
6190 | |
6191 HeapRegion* cur = cs_head; | |
6192 int age_bound = -1; | |
6193 size_t rs_lengths = 0; | |
6194 | |
6195 while (cur != NULL) { | |
2361 | 6196 assert(!is_on_master_free_list(cur), "sanity"); |
342 | 6197 if (non_young) { |
6198 if (cur->is_young()) { | |
6199 double end_sec = os::elapsedTime(); | |
6200 double elapsed_ms = (end_sec - start_sec) * 1000.0; | |
6201 non_young_time_ms += elapsed_ms; | |
6202 | |
6203 start_sec = os::elapsedTime(); | |
6204 non_young = false; | |
6205 } | |
6206 } else { | |
4097
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
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4095
diff
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|
6207 if (!cur->is_young()) { |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
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|
6208 double end_sec = os::elapsedTime(); |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
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|
6209 double elapsed_ms = (end_sec - start_sec) * 1000.0; |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
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|
6210 young_time_ms += elapsed_ms; |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
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|
6211 |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
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|
6212 start_sec = os::elapsedTime(); |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
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|
6213 non_young = true; |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
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|
6214 } |
342 | 6215 } |
6216 | |
17755
96b1c2e06e25
8027295: Free CSet takes ~50% of young pause time
tschatzl
parents:
17753
diff
changeset
|
6217 rs_lengths += cur->rem_set()->occupied_locked(); |
342 | 6218 |
6219 HeapRegion* next = cur->next_in_collection_set(); | |
6220 assert(cur->in_collection_set(), "bad CS"); | |
6221 cur->set_next_in_collection_set(NULL); | |
6222 cur->set_in_collection_set(false); | |
6223 | |
6224 if (cur->is_young()) { | |
6225 int index = cur->young_index_in_cset(); | |
4090
a88de71c4e3a
7097002: G1: remove a lot of unused / redundant code from the G1CollectorPolicy class
tonyp
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4073
diff
changeset
|
6226 assert(index != -1, "invariant"); |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
6227 assert((uint) index < policy->young_cset_region_length(), "invariant"); |
342 | 6228 size_t words_survived = _surviving_young_words[index]; |
6229 cur->record_surv_words_in_group(words_survived); | |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
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1391
diff
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|
6230 |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
6231 // At this point the we have 'popped' cur from the collection set |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
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|
6232 // (linked via next_in_collection_set()) but it is still in the |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
6233 // young list (linked via next_young_region()). Clear the |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
6234 // _next_young_region field. |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
6235 cur->set_next_young_region(NULL); |
342 | 6236 } else { |
6237 int index = cur->young_index_in_cset(); | |
4090
a88de71c4e3a
7097002: G1: remove a lot of unused / redundant code from the G1CollectorPolicy class
tonyp
parents:
4073
diff
changeset
|
6238 assert(index == -1, "invariant"); |
342 | 6239 } |
6240 | |
6241 assert( (cur->is_young() && cur->young_index_in_cset() > -1) || | |
6242 (!cur->is_young() && cur->young_index_in_cset() == -1), | |
6243 "invariant" ); | |
6244 | |
6245 if (!cur->evacuation_failed()) { | |
4097
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
6246 MemRegion used_mr = cur->used_region(); |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
6247 |
342 | 6248 // And the region is empty. |
4097
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
6249 assert(!used_mr.is_empty(), "Should not have empty regions in a CS."); |
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6250 pre_used += cur->used(); |
17755
96b1c2e06e25
8027295: Free CSet takes ~50% of young pause time
tschatzl
parents:
17753
diff
changeset
|
6251 free_region(cur, &local_free_list, false /* par */, true /* locked */); |
342 | 6252 } else { |
6253 cur->uninstall_surv_rate_group(); | |
4090
a88de71c4e3a
7097002: G1: remove a lot of unused / redundant code from the G1CollectorPolicy class
tonyp
parents:
4073
diff
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|
6254 if (cur->is_young()) { |
342 | 6255 cur->set_young_index_in_cset(-1); |
4090
a88de71c4e3a
7097002: G1: remove a lot of unused / redundant code from the G1CollectorPolicy class
tonyp
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4073
diff
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|
6256 } |
342 | 6257 cur->set_not_young(); |
6258 cur->set_evacuation_failed(false); | |
4072 | 6259 // The region is now considered to be old. |
6260 _old_set.add(cur); | |
10405 | 6261 evacuation_info.increment_collectionset_used_after(cur->used()); |
342 | 6262 } |
6263 cur = next; | |
6264 } | |
6265 | |
10405 | 6266 evacuation_info.set_regions_freed(local_free_list.length()); |
342 | 6267 policy->record_max_rs_lengths(rs_lengths); |
6268 policy->cset_regions_freed(); | |
6269 | |
6270 double end_sec = os::elapsedTime(); | |
6271 double elapsed_ms = (end_sec - start_sec) * 1000.0; | |
4097
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
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|
6272 |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
6273 if (non_young) { |
342 | 6274 non_young_time_ms += elapsed_ms; |
4097
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
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|
6275 } else { |
342 | 6276 young_time_ms += elapsed_ms; |
4097
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
6277 } |
342 | 6278 |
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
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|
6279 prepend_to_freelist(&local_free_list); |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
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17727
diff
changeset
|
6280 decrement_summary_bytes(pre_used); |
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
6281 policy->phase_times()->record_young_free_cset_time_ms(young_time_ms); |
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
6282 policy->phase_times()->record_non_young_free_cset_time_ms(non_young_time_ms); |
342 | 6283 } |
6284 | |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
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1391
diff
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|
6285 // This routine is similar to the above but does not record |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
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1391
diff
changeset
|
6286 // any policy statistics or update free lists; we are abandoning |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
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1391
diff
changeset
|
6287 // the current incremental collection set in preparation of a |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
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1391
diff
changeset
|
6288 // full collection. After the full GC we will start to build up |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
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1391
diff
changeset
|
6289 // the incremental collection set again. |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
6290 // This is only called when we're doing a full collection |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
6291 // and is immediately followed by the tearing down of the young list. |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
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1391
diff
changeset
|
6292 |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
6293 void G1CollectedHeap::abandon_collection_set(HeapRegion* cs_head) { |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
6294 HeapRegion* cur = cs_head; |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
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1391
diff
changeset
|
6295 |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
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1391
diff
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|
6296 while (cur != NULL) { |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
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1391
diff
changeset
|
6297 HeapRegion* next = cur->next_in_collection_set(); |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
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1391
diff
changeset
|
6298 assert(cur->in_collection_set(), "bad CS"); |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
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1391
diff
changeset
|
6299 cur->set_next_in_collection_set(NULL); |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
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1391
diff
changeset
|
6300 cur->set_in_collection_set(false); |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
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1391
diff
changeset
|
6301 cur->set_young_index_in_cset(-1); |
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6819061: G1: eliminate serial Other times that are proportional to the collection set length
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changeset
|
6302 cur = next; |
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6819061: G1: eliminate serial Other times that are proportional to the collection set length
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diff
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|
6303 } |
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6819061: G1: eliminate serial Other times that are proportional to the collection set length
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1391
diff
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|
6304 } |
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6819061: G1: eliminate serial Other times that are proportional to the collection set length
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diff
changeset
|
6305 |
2152 | 6306 void G1CollectedHeap::set_free_regions_coming() { |
6307 if (G1ConcRegionFreeingVerbose) { | |
6308 gclog_or_tty->print_cr("G1ConcRegionFreeing [cm thread] : " | |
6309 "setting free regions coming"); | |
6310 } | |
6311 | |
6312 assert(!free_regions_coming(), "pre-condition"); | |
6313 _free_regions_coming = true; | |
342 | 6314 } |
6315 | |
2152 | 6316 void G1CollectedHeap::reset_free_regions_coming() { |
4837
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
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|
6317 assert(free_regions_coming(), "pre-condition"); |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
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|
6318 |
2152 | 6319 { |
6320 MutexLockerEx x(SecondaryFreeList_lock, Mutex::_no_safepoint_check_flag); | |
6321 _free_regions_coming = false; | |
6322 SecondaryFreeList_lock->notify_all(); | |
6323 } | |
6324 | |
6325 if (G1ConcRegionFreeingVerbose) { | |
6326 gclog_or_tty->print_cr("G1ConcRegionFreeing [cm thread] : " | |
6327 "reset free regions coming"); | |
342 | 6328 } |
6329 } | |
6330 | |
2152 | 6331 void G1CollectedHeap::wait_while_free_regions_coming() { |
6332 // Most of the time we won't have to wait, so let's do a quick test | |
6333 // first before we take the lock. | |
6334 if (!free_regions_coming()) { | |
6335 return; | |
6336 } | |
6337 | |
6338 if (G1ConcRegionFreeingVerbose) { | |
6339 gclog_or_tty->print_cr("G1ConcRegionFreeing [other] : " | |
6340 "waiting for free regions"); | |
342 | 6341 } |
6342 | |
6343 { | |
2152 | 6344 MutexLockerEx x(SecondaryFreeList_lock, Mutex::_no_safepoint_check_flag); |
6345 while (free_regions_coming()) { | |
6346 SecondaryFreeList_lock->wait(Mutex::_no_safepoint_check_flag); | |
342 | 6347 } |
2152 | 6348 } |
6349 | |
6350 if (G1ConcRegionFreeingVerbose) { | |
6351 gclog_or_tty->print_cr("G1ConcRegionFreeing [other] : " | |
6352 "done waiting for free regions"); | |
6353 } | |
342 | 6354 } |
6355 | |
6356 void G1CollectedHeap::set_region_short_lived_locked(HeapRegion* hr) { | |
6357 assert(heap_lock_held_for_gc(), | |
6358 "the heap lock should already be held by or for this thread"); | |
6359 _young_list->push_region(hr); | |
6360 } | |
6361 | |
6362 class NoYoungRegionsClosure: public HeapRegionClosure { | |
6363 private: | |
6364 bool _success; | |
6365 public: | |
6366 NoYoungRegionsClosure() : _success(true) { } | |
6367 bool doHeapRegion(HeapRegion* r) { | |
6368 if (r->is_young()) { | |
6369 gclog_or_tty->print_cr("Region ["PTR_FORMAT", "PTR_FORMAT") tagged as young", | |
6370 r->bottom(), r->end()); | |
6371 _success = false; | |
6372 } | |
6373 return false; | |
6374 } | |
6375 bool success() { return _success; } | |
6376 }; | |
6377 | |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
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|
6378 bool G1CollectedHeap::check_young_list_empty(bool check_heap, bool check_sample) { |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
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|
6379 bool ret = _young_list->check_list_empty(check_sample); |
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6819061: G1: eliminate serial Other times that are proportional to the collection set length
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|
6380 |
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6819061: G1: eliminate serial Other times that are proportional to the collection set length
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diff
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|
6381 if (check_heap) { |
342 | 6382 NoYoungRegionsClosure closure; |
6383 heap_region_iterate(&closure); | |
6384 ret = ret && closure.success(); | |
6385 } | |
6386 | |
6387 return ret; | |
6388 } | |
6389 | |
4072 | 6390 class TearDownRegionSetsClosure : public HeapRegionClosure { |
6391 private: | |
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
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diff
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|
6392 HeapRegionSet *_old_set; |
2152 | 6393 |
342 | 6394 public: |
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
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diff
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|
6395 TearDownRegionSetsClosure(HeapRegionSet* old_set) : _old_set(old_set) { } |
2152 | 6396 |
342 | 6397 bool doHeapRegion(HeapRegion* r) { |
4072 | 6398 if (r->is_empty()) { |
6399 // We ignore empty regions, we'll empty the free list afterwards | |
6400 } else if (r->is_young()) { | |
6401 // We ignore young regions, we'll empty the young list afterwards | |
6402 } else if (r->isHumongous()) { | |
6403 // We ignore humongous regions, we're not tearing down the | |
6404 // humongous region set | |
342 | 6405 } else { |
4072 | 6406 // The rest should be old |
6407 _old_set->remove(r); | |
342 | 6408 } |
6409 return false; | |
6410 } | |
6411 | |
4072 | 6412 ~TearDownRegionSetsClosure() { |
6413 assert(_old_set->is_empty(), "post-condition"); | |
2152 | 6414 } |
342 | 6415 }; |
6416 | |
4072 | 6417 void G1CollectedHeap::tear_down_region_sets(bool free_list_only) { |
6418 assert_at_safepoint(true /* should_be_vm_thread */); | |
6419 | |
6420 if (!free_list_only) { | |
6421 TearDownRegionSetsClosure cl(&_old_set); | |
6422 heap_region_iterate(&cl); | |
6423 | |
17764 | 6424 // Note that emptying the _young_list is postponed and instead done as |
6425 // the first step when rebuilding the regions sets again. The reason for | |
6426 // this is that during a full GC string deduplication needs to know if | |
6427 // a collected region was young or old when the full GC was initiated. | |
4072 | 6428 } |
6429 _free_list.remove_all(); | |
6430 } | |
6431 | |
6432 class RebuildRegionSetsClosure : public HeapRegionClosure { | |
6433 private: | |
6434 bool _free_list_only; | |
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6435 HeapRegionSet* _old_set; |
4072 | 6436 FreeRegionList* _free_list; |
6437 size_t _total_used; | |
6438 | |
6439 public: | |
6440 RebuildRegionSetsClosure(bool free_list_only, | |
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6441 HeapRegionSet* old_set, FreeRegionList* free_list) : |
4072 | 6442 _free_list_only(free_list_only), |
6443 _old_set(old_set), _free_list(free_list), _total_used(0) { | |
6444 assert(_free_list->is_empty(), "pre-condition"); | |
6445 if (!free_list_only) { | |
6446 assert(_old_set->is_empty(), "pre-condition"); | |
6447 } | |
6448 } | |
6449 | |
6450 bool doHeapRegion(HeapRegion* r) { | |
6451 if (r->continuesHumongous()) { | |
6452 return false; | |
6453 } | |
6454 | |
6455 if (r->is_empty()) { | |
6456 // Add free regions to the free list | |
6457 _free_list->add_as_tail(r); | |
6458 } else if (!_free_list_only) { | |
6459 assert(!r->is_young(), "we should not come across young regions"); | |
6460 | |
6461 if (r->isHumongous()) { | |
6462 // We ignore humongous regions, we left the humongous set unchanged | |
6463 } else { | |
6464 // The rest should be old, add them to the old set | |
6465 _old_set->add(r); | |
6466 } | |
6467 _total_used += r->used(); | |
6468 } | |
6469 | |
6470 return false; | |
6471 } | |
6472 | |
6473 size_t total_used() { | |
6474 return _total_used; | |
6475 } | |
6476 }; | |
6477 | |
6478 void G1CollectedHeap::rebuild_region_sets(bool free_list_only) { | |
6479 assert_at_safepoint(true /* should_be_vm_thread */); | |
6480 | |
17764 | 6481 if (!free_list_only) { |
6482 _young_list->empty_list(); | |
6483 } | |
6484 | |
4072 | 6485 RebuildRegionSetsClosure cl(free_list_only, &_old_set, &_free_list); |
6486 heap_region_iterate(&cl); | |
6487 | |
6488 if (!free_list_only) { | |
6489 _summary_bytes_used = cl.total_used(); | |
6490 } | |
6491 assert(_summary_bytes_used == recalculate_used(), | |
6492 err_msg("inconsistent _summary_bytes_used, " | |
6493 "value: "SIZE_FORMAT" recalculated: "SIZE_FORMAT, | |
6494 _summary_bytes_used, recalculate_used())); | |
342 | 6495 } |
6496 | |
6497 void G1CollectedHeap::set_refine_cte_cl_concurrency(bool concurrent) { | |
6498 _refine_cte_cl->set_concurrent(concurrent); | |
6499 } | |
6500 | |
6501 bool G1CollectedHeap::is_in_closed_subset(const void* p) const { | |
6502 HeapRegion* hr = heap_region_containing(p); | |
6503 if (hr == NULL) { | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
6504 return false; |
342 | 6505 } else { |
6506 return hr->is_in(p); | |
6507 } | |
6508 } | |
2152 | 6509 |
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6510 // Methods for the mutator alloc region |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6511 |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6512 HeapRegion* G1CollectedHeap::new_mutator_alloc_region(size_t word_size, |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6513 bool force) { |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6514 assert_heap_locked_or_at_safepoint(true /* should_be_vm_thread */); |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6515 assert(!force || g1_policy()->can_expand_young_list(), |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6516 "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
|
6517 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
|
6518 if (force || !young_list_full) { |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6519 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
|
6520 false /* is_old */, |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6521 false /* do_expand */); |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6522 if (new_alloc_region != NULL) { |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6523 set_region_short_lived_locked(new_alloc_region); |
3778
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
6524 _hr_printer.alloc(new_alloc_region, G1HRPrinter::Eden, young_list_full); |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6525 return new_alloc_region; |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6526 } |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6527 } |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6528 return NULL; |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6529 } |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6530 |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6531 void G1CollectedHeap::retire_mutator_alloc_region(HeapRegion* alloc_region, |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6532 size_t allocated_bytes) { |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6533 assert_heap_locked_or_at_safepoint(true /* should_be_vm_thread */); |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6534 assert(alloc_region->is_young(), "all mutator alloc regions should be young"); |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6535 |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6536 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
|
6537 _summary_bytes_used += allocated_bytes; |
3778
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
6538 _hr_printer.retire(alloc_region); |
3980
8229bd737950
7075646: G1: fix inconsistencies in the monitoring data
tonyp
parents:
3979
diff
changeset
|
6539 // 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
|
6540 // 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
|
6541 // used space has been recored in _summary_bytes_used. |
8229bd737950
7075646: G1: fix inconsistencies in the monitoring data
tonyp
parents:
3979
diff
changeset
|
6542 g1mm()->update_eden_size(); |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6543 } |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6544 |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6545 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
|
6546 bool force) { |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6547 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
|
6548 } |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6549 |
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6550 void G1CollectedHeap::set_par_threads() { |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6551 // 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
|
6552 // in the workgroup. |
4711 | 6553 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
|
6554 uint n_workers = workers()->active_workers(); |
4711 | 6555 assert(UseDynamicNumberOfGCThreads || |
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6556 n_workers == workers()->total_workers(), |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6557 "Otherwise should be using the total number of workers"); |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6558 if (n_workers == 0) { |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6559 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
|
6560 n_workers = ParallelGCThreads; |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6561 workers()->set_active_workers(n_workers); |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6562 } |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6563 set_par_threads(n_workers); |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6564 } |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6565 |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6566 void MutatorAllocRegion::retire_region(HeapRegion* alloc_region, |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6567 size_t allocated_bytes) { |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6568 _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
|
6569 } |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6570 |
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6571 // Methods for the GC alloc regions |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6572 |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6573 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
|
6574 uint count, |
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6575 GCAllocPurpose ap) { |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6576 assert(FreeList_lock->owned_by_self(), "pre-condition"); |
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6577 |
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6578 if (count < g1_policy()->max_regions(ap)) { |
17773
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6579 bool survivor = (ap == GCAllocForSurvived); |
3830
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6580 HeapRegion* new_alloc_region = new_region(word_size, |
17773
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|
6581 !survivor, |
3830
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|
6582 true /* do_expand */); |
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6583 if (new_alloc_region != NULL) { |
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6584 // We really only need to do this for old regions given that we |
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6585 // should never scan survivors. But it doesn't hurt to do it |
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6586 // for survivors too. |
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|
6587 new_alloc_region->set_saved_mark(); |
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6588 if (survivor) { |
3830
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6589 new_alloc_region->set_survivor(); |
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6590 _hr_printer.alloc(new_alloc_region, G1HRPrinter::Survivor); |
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6591 } else { |
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|
6592 _hr_printer.alloc(new_alloc_region, G1HRPrinter::Old); |
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|
6593 } |
4787
2ace1c4ee8da
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|
6594 bool during_im = g1_policy()->during_initial_mark_pause(); |
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6595 new_alloc_region->note_start_of_copying(during_im); |
3830
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6596 return new_alloc_region; |
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6597 } else { |
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|
6598 g1_policy()->note_alloc_region_limit_reached(ap); |
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|
6599 } |
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|
6600 } |
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|
6601 return NULL; |
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|
6602 } |
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|
6603 |
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|
6604 void G1CollectedHeap::retire_gc_alloc_region(HeapRegion* alloc_region, |
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6605 size_t allocated_bytes, |
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6606 GCAllocPurpose ap) { |
4787
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6607 bool during_im = g1_policy()->during_initial_mark_pause(); |
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6608 alloc_region->note_end_of_copying(during_im); |
3830
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|
6609 g1_policy()->record_bytes_copied_during_gc(allocated_bytes); |
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6610 if (ap == GCAllocForSurvived) { |
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|
6611 young_list()->add_survivor_region(alloc_region); |
4072 | 6612 } else { |
6613 _old_set.add(alloc_region); | |
3830
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|
6614 } |
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|
6615 _hr_printer.retire(alloc_region); |
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|
6616 } |
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|
6617 |
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|
6618 HeapRegion* SurvivorGCAllocRegion::allocate_new_region(size_t word_size, |
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|
6619 bool force) { |
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|
6620 assert(!force, "not supported for GC alloc regions"); |
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6621 return _g1h->new_gc_alloc_region(word_size, count(), GCAllocForSurvived); |
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|
6622 } |
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|
6623 |
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|
6624 void SurvivorGCAllocRegion::retire_region(HeapRegion* alloc_region, |
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|
6625 size_t allocated_bytes) { |
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|
6626 _g1h->retire_gc_alloc_region(alloc_region, allocated_bytes, |
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|
6627 GCAllocForSurvived); |
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|
6628 } |
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|
6629 |
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|
6630 HeapRegion* OldGCAllocRegion::allocate_new_region(size_t word_size, |
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|
6631 bool force) { |
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|
6632 assert(!force, "not supported for GC alloc regions"); |
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|
6633 return _g1h->new_gc_alloc_region(word_size, count(), GCAllocForTenured); |
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|
6634 } |
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|
6635 |
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|
6636 void OldGCAllocRegion::retire_region(HeapRegion* alloc_region, |
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|
6637 size_t allocated_bytes) { |
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|
6638 _g1h->retire_gc_alloc_region(alloc_region, allocated_bytes, |
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|
6639 GCAllocForTenured); |
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|
6640 } |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6641 // Heap region set verification |
abdfc822206f
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tonyp
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2432
diff
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|
6642 |
2152 | 6643 class VerifyRegionListsClosure : public HeapRegionClosure { |
6644 private: | |
17736
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8034079: G1: Refactor the HeapRegionSet hierarchy
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diff
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|
6645 HeapRegionSet* _old_set; |
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|
6646 HeapRegionSet* _humongous_set; |
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|
6647 FreeRegionList* _free_list; |
2152 | 6648 |
6649 public: | |
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
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|
6650 HeapRegionSetCount _old_count; |
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|
6651 HeapRegionSetCount _humongous_count; |
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diff
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|
6652 HeapRegionSetCount _free_count; |
58fc1b1523dc
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changeset
|
6653 |
58fc1b1523dc
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diff
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|
6654 VerifyRegionListsClosure(HeapRegionSet* old_set, |
58fc1b1523dc
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|
6655 HeapRegionSet* humongous_set, |
2152 | 6656 FreeRegionList* free_list) : |
17736
58fc1b1523dc
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brutisso
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|
6657 _old_set(old_set), _humongous_set(humongous_set), _free_list(free_list), |
58fc1b1523dc
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brutisso
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|
6658 _old_count(), _humongous_count(), _free_count(){ } |
2152 | 6659 |
6660 bool doHeapRegion(HeapRegion* hr) { | |
6661 if (hr->continuesHumongous()) { | |
6662 return false; | |
6663 } | |
6664 | |
6665 if (hr->is_young()) { | |
6666 // TODO | |
6667 } else if (hr->startsHumongous()) { | |
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
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diff
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|
6668 assert(hr->containing_set() == _humongous_set, err_msg("Heap region %u is starts humongous but not in humongous set.", hr->region_num())); |
58fc1b1523dc
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brutisso
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|
6669 _humongous_count.increment(1u, hr->capacity()); |
2152 | 6670 } else if (hr->is_empty()) { |
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
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diff
changeset
|
6671 assert(hr->containing_set() == _free_list, err_msg("Heap region %u is empty but not on the free list.", hr->region_num())); |
58fc1b1523dc
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brutisso
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diff
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|
6672 _free_count.increment(1u, hr->capacity()); |
4072 | 6673 } else { |
17736
58fc1b1523dc
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brutisso
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diff
changeset
|
6674 assert(hr->containing_set() == _old_set, err_msg("Heap region %u is old but not in the old set.", hr->region_num())); |
58fc1b1523dc
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brutisso
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diff
changeset
|
6675 _old_count.increment(1u, hr->capacity()); |
2152 | 6676 } |
6677 return false; | |
6678 } | |
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
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17727
diff
changeset
|
6679 |
58fc1b1523dc
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diff
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|
6680 void verify_counts(HeapRegionSet* old_set, HeapRegionSet* humongous_set, FreeRegionList* free_list) { |
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|
6681 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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|
6682 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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|
6683 old_set->total_capacity_bytes(), _old_count.capacity())); |
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|
6684 |
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|
6685 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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|
6686 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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|
6687 humongous_set->total_capacity_bytes(), _humongous_count.capacity())); |
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|
6688 |
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|
6689 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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|
6690 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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|
6691 free_list->total_capacity_bytes(), _free_count.capacity())); |
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|
6692 } |
2152 | 6693 }; |
6694 | |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
6695 HeapRegion* G1CollectedHeap::new_heap_region(uint hrs_index, |
3766 | 6696 HeapWord* bottom) { |
6697 HeapWord* end = bottom + HeapRegion::GrainWords; | |
6698 MemRegion mr(bottom, end); | |
6699 assert(_g1_reserved.contains(mr), "invariant"); | |
6700 // This might return NULL if the allocation fails | |
6754
8fbf05030e24
7016955: G1: remove the is_zeroed parameter from the HeapRegion constructor
johnc
parents:
6752
diff
changeset
|
6701 return new HeapRegion(hrs_index, _bot_shared, mr); |
3766 | 6702 } |
6703 | |
2152 | 6704 void G1CollectedHeap::verify_region_sets() { |
6705 assert_heap_locked_or_at_safepoint(true /* should_be_vm_thread */); | |
6706 | |
6707 // First, check the explicit lists. | |
17736
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brutisso
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diff
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|
6708 _free_list.verify_list(); |
2152 | 6709 { |
6710 // Given that a concurrent operation might be adding regions to | |
6711 // the secondary free list we have to take the lock before | |
6712 // verifying it. | |
6713 MutexLockerEx x(SecondaryFreeList_lock, Mutex::_no_safepoint_check_flag); | |
17736
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|
6714 _secondary_free_list.verify_list(); |
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|
6715 } |
2152 | 6716 |
6717 // If a concurrent region freeing operation is in progress it will | |
6718 // be difficult to correctly attributed any free regions we come | |
6719 // across to the correct free list given that they might belong to | |
6720 // one of several (free_list, secondary_free_list, any local lists, | |
6721 // etc.). So, if that's the case we will skip the rest of the | |
6722 // verification operation. Alternatively, waiting for the concurrent | |
6723 // operation to complete will have a non-trivial effect on the GC's | |
6724 // operation (no concurrent operation will last longer than the | |
6725 // interval between two calls to verification) and it might hide | |
6726 // any issues that we would like to catch during testing. | |
6727 if (free_regions_coming()) { | |
6728 return; | |
6729 } | |
6730 | |
2361 | 6731 // Make sure we append the secondary_free_list on the free_list so |
6732 // that all free regions we will come across can be safely | |
6733 // attributed to the free_list. | |
6734 append_secondary_free_list_if_not_empty_with_lock(); | |
2152 | 6735 |
6736 // Finally, make sure that the region accounting in the lists is | |
6737 // consistent with what we see in the heap. | |
6738 | |
4072 | 6739 VerifyRegionListsClosure cl(&_old_set, &_humongous_set, &_free_list); |
2152 | 6740 heap_region_iterate(&cl); |
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6741 cl.verify_counts(&_old_set, &_humongous_set, &_free_list); |
342 | 6742 } |
12080 | 6743 |
6744 // Optimized nmethod scanning | |
6745 | |
6746 class RegisterNMethodOopClosure: public OopClosure { | |
6747 G1CollectedHeap* _g1h; | |
6748 nmethod* _nm; | |
6749 | |
6750 template <class T> void do_oop_work(T* p) { | |
6751 T heap_oop = oopDesc::load_heap_oop(p); | |
6752 if (!oopDesc::is_null(heap_oop)) { | |
6753 oop obj = oopDesc::decode_heap_oop_not_null(heap_oop); | |
6754 HeapRegion* hr = _g1h->heap_region_containing(obj); | |
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6755 assert(!hr->continuesHumongous(), |
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6756 err_msg("trying to add code root "PTR_FORMAT" in continuation of humongous region "HR_FORMAT |
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6757 " starting at "HR_FORMAT, |
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6758 _nm, HR_FORMAT_PARAMS(hr), HR_FORMAT_PARAMS(hr->humongous_start_region()))); |
12080 | 6759 |
6760 // HeapRegion::add_strong_code_root() avoids adding duplicate | |
6761 // entries but having duplicates is OK since we "mark" nmethods | |
6762 // as visited when we scan the strong code root lists during the GC. | |
6763 hr->add_strong_code_root(_nm); | |
13062
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6764 assert(hr->rem_set()->strong_code_roots_list_contains(_nm), |
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6765 err_msg("failed to add code root "PTR_FORMAT" to remembered set of region "HR_FORMAT, |
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6766 _nm, HR_FORMAT_PARAMS(hr))); |
12080 | 6767 } |
6768 } | |
6769 | |
6770 public: | |
6771 RegisterNMethodOopClosure(G1CollectedHeap* g1h, nmethod* nm) : | |
6772 _g1h(g1h), _nm(nm) {} | |
6773 | |
6774 void do_oop(oop* p) { do_oop_work(p); } | |
6775 void do_oop(narrowOop* p) { do_oop_work(p); } | |
6776 }; | |
6777 | |
6778 class UnregisterNMethodOopClosure: public OopClosure { | |
6779 G1CollectedHeap* _g1h; | |
6780 nmethod* _nm; | |
6781 | |
6782 template <class T> void do_oop_work(T* p) { | |
6783 T heap_oop = oopDesc::load_heap_oop(p); | |
6784 if (!oopDesc::is_null(heap_oop)) { | |
6785 oop obj = oopDesc::decode_heap_oop_not_null(heap_oop); | |
6786 HeapRegion* hr = _g1h->heap_region_containing(obj); | |
13062
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6787 assert(!hr->continuesHumongous(), |
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6788 err_msg("trying to remove code root "PTR_FORMAT" in continuation of humongous region "HR_FORMAT |
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6789 " starting at "HR_FORMAT, |
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6790 _nm, HR_FORMAT_PARAMS(hr), HR_FORMAT_PARAMS(hr->humongous_start_region()))); |
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6791 |
12080 | 6792 hr->remove_strong_code_root(_nm); |
13062
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6793 assert(!hr->rem_set()->strong_code_roots_list_contains(_nm), |
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6794 err_msg("failed to remove code root "PTR_FORMAT" of region "HR_FORMAT, |
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6795 _nm, HR_FORMAT_PARAMS(hr))); |
12080 | 6796 } |
6797 } | |
6798 | |
6799 public: | |
6800 UnregisterNMethodOopClosure(G1CollectedHeap* g1h, nmethod* nm) : | |
6801 _g1h(g1h), _nm(nm) {} | |
6802 | |
6803 void do_oop(oop* p) { do_oop_work(p); } | |
6804 void do_oop(narrowOop* p) { do_oop_work(p); } | |
6805 }; | |
6806 | |
6807 void G1CollectedHeap::register_nmethod(nmethod* nm) { | |
6808 CollectedHeap::register_nmethod(nm); | |
6809 | |
6810 guarantee(nm != NULL, "sanity"); | |
6811 RegisterNMethodOopClosure reg_cl(this, nm); | |
6812 nm->oops_do(®_cl); | |
6813 } | |
6814 | |
6815 void G1CollectedHeap::unregister_nmethod(nmethod* nm) { | |
6816 CollectedHeap::unregister_nmethod(nm); | |
6817 | |
6818 guarantee(nm != NULL, "sanity"); | |
6819 UnregisterNMethodOopClosure reg_cl(this, nm); | |
6820 nm->oops_do(®_cl, true); | |
6821 } | |
6822 | |
6823 class MigrateCodeRootsHeapRegionClosure: public HeapRegionClosure { | |
6824 public: | |
6825 bool doHeapRegion(HeapRegion *hr) { | |
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6826 assert(!hr->isHumongous(), |
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6827 err_msg("humongous region "HR_FORMAT" should not have been added to collection set", |
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6828 HR_FORMAT_PARAMS(hr))); |
12080 | 6829 hr->migrate_strong_code_roots(); |
6830 return false; | |
6831 } | |
6832 }; | |
6833 | |
6834 void G1CollectedHeap::migrate_strong_code_roots() { | |
6835 MigrateCodeRootsHeapRegionClosure cl; | |
6836 double migrate_start = os::elapsedTime(); | |
6837 collection_set_iterate(&cl); | |
6838 double migration_time_ms = (os::elapsedTime() - migrate_start) * 1000.0; | |
6839 g1_policy()->phase_times()->record_strong_code_root_migration_time(migration_time_ms); | |
6840 } | |
6841 | |
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191174b49bec
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6842 void G1CollectedHeap::purge_code_root_memory() { |
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6843 double purge_start = os::elapsedTime(); |
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6844 G1CodeRootSet::purge_chunks(G1CodeRootsChunkCacheKeepPercent); |
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6845 double purge_time_ms = (os::elapsedTime() - purge_start) * 1000.0; |
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6846 g1_policy()->phase_times()->record_strong_code_root_purge_time(purge_time_ms); |
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6847 } |
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6848 |
12080 | 6849 // Mark all the code roots that point into regions *not* in the |
6850 // collection set. | |
6851 // | |
6852 // Note we do not want to use a "marking" CodeBlobToOopClosure while | |
6853 // walking the the code roots lists of regions not in the collection | |
6854 // set. Suppose we have an nmethod (M) that points to objects in two | |
6855 // separate regions - one in the collection set (R1) and one not (R2). | |
6856 // Using a "marking" CodeBlobToOopClosure here would result in "marking" | |
6857 // nmethod M when walking the code roots for R1. When we come to scan | |
6858 // the code roots for R2, we would see that M is already marked and it | |
6859 // would be skipped and the objects in R2 that are referenced from M | |
6860 // would not be evacuated. | |
6861 | |
6862 class MarkStrongCodeRootCodeBlobClosure: public CodeBlobClosure { | |
6863 | |
6864 class MarkStrongCodeRootOopClosure: public OopClosure { | |
6865 ConcurrentMark* _cm; | |
6866 HeapRegion* _hr; | |
6867 uint _worker_id; | |
6868 | |
6869 template <class T> void do_oop_work(T* p) { | |
6870 T heap_oop = oopDesc::load_heap_oop(p); | |
6871 if (!oopDesc::is_null(heap_oop)) { | |
6872 oop obj = oopDesc::decode_heap_oop_not_null(heap_oop); | |
6873 // Only mark objects in the region (which is assumed | |
6874 // to be not in the collection set). | |
6875 if (_hr->is_in(obj)) { | |
6876 _cm->grayRoot(obj, (size_t) obj->size(), _worker_id); | |
6877 } | |
6878 } | |
6879 } | |
6880 | |
6881 public: | |
6882 MarkStrongCodeRootOopClosure(ConcurrentMark* cm, HeapRegion* hr, uint worker_id) : | |
6883 _cm(cm), _hr(hr), _worker_id(worker_id) { | |
6884 assert(!_hr->in_collection_set(), "sanity"); | |
6885 } | |
6886 | |
6887 void do_oop(narrowOop* p) { do_oop_work(p); } | |
6888 void do_oop(oop* p) { do_oop_work(p); } | |
6889 }; | |
6890 | |
6891 MarkStrongCodeRootOopClosure _oop_cl; | |
6892 | |
6893 public: | |
6894 MarkStrongCodeRootCodeBlobClosure(ConcurrentMark* cm, HeapRegion* hr, uint worker_id): | |
6895 _oop_cl(cm, hr, worker_id) {} | |
6896 | |
6897 void do_code_blob(CodeBlob* cb) { | |
6898 nmethod* nm = (cb == NULL) ? NULL : cb->as_nmethod_or_null(); | |
6899 if (nm != NULL) { | |
6900 nm->oops_do(&_oop_cl); | |
6901 } | |
6902 } | |
6903 }; | |
6904 | |
6905 class MarkStrongCodeRootsHRClosure: public HeapRegionClosure { | |
6906 G1CollectedHeap* _g1h; | |
6907 uint _worker_id; | |
6908 | |
6909 public: | |
6910 MarkStrongCodeRootsHRClosure(G1CollectedHeap* g1h, uint worker_id) : | |
6911 _g1h(g1h), _worker_id(worker_id) {} | |
6912 | |
6913 bool doHeapRegion(HeapRegion *hr) { | |
6914 HeapRegionRemSet* hrrs = hr->rem_set(); | |
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6915 if (hr->continuesHumongous()) { |
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6916 // Code roots should never be attached to a continuation of a humongous region |
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6917 assert(hrrs->strong_code_roots_list_length() == 0, |
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6918 err_msg("code roots should never be attached to continuations of humongous region "HR_FORMAT |
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6919 " starting at "HR_FORMAT", but has "SIZE_FORMAT, |
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6920 HR_FORMAT_PARAMS(hr), HR_FORMAT_PARAMS(hr->humongous_start_region()), |
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6921 hrrs->strong_code_roots_list_length())); |
12080 | 6922 return false; |
6923 } | |
6924 | |
6925 if (hr->in_collection_set()) { | |
6926 // Don't mark code roots into regions in the collection set here. | |
6927 // They will be marked when we scan them. | |
6928 return false; | |
6929 } | |
6930 | |
6931 MarkStrongCodeRootCodeBlobClosure cb_cl(_g1h->concurrent_mark(), hr, _worker_id); | |
6932 hr->strong_code_roots_do(&cb_cl); | |
6933 return false; | |
6934 } | |
6935 }; | |
6936 | |
6937 void G1CollectedHeap::mark_strong_code_roots(uint worker_id) { | |
6938 MarkStrongCodeRootsHRClosure cl(this, worker_id); | |
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6939 if (G1CollectedHeap::use_parallel_gc_threads()) { |
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6940 heap_region_par_iterate_chunked(&cl, |
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6941 worker_id, |
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6942 workers()->active_workers(), |
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6943 HeapRegion::ParMarkRootClaimValue); |
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6944 } else { |
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6945 heap_region_iterate(&cl); |
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6946 } |
12080 | 6947 } |
6948 | |
6949 class RebuildStrongCodeRootClosure: public CodeBlobClosure { | |
6950 G1CollectedHeap* _g1h; | |
6951 | |
6952 public: | |
6953 RebuildStrongCodeRootClosure(G1CollectedHeap* g1h) : | |
6954 _g1h(g1h) {} | |
6955 | |
6956 void do_code_blob(CodeBlob* cb) { | |
6957 nmethod* nm = (cb != NULL) ? cb->as_nmethod_or_null() : NULL; | |
6958 if (nm == NULL) { | |
6959 return; | |
6960 } | |
6961 | |
6962 if (ScavengeRootsInCode && nm->detect_scavenge_root_oops()) { | |
6963 _g1h->register_nmethod(nm); | |
6964 } | |
6965 } | |
6966 }; | |
6967 | |
6968 void G1CollectedHeap::rebuild_strong_code_roots() { | |
6969 RebuildStrongCodeRootClosure blob_cl(this); | |
6970 CodeCache::blobs_do(&blob_cl); | |
6971 } |