Mercurial > hg > truffle
annotate src/share/vm/gc_implementation/g1/g1CollectedHeap.cpp @ 8853:2e093b564241
7014552: gc/lock/jni/jnilockXXX works too slow on 1-processor machine
Summary: Keep a counter of how many times we were stalled by the GC locker, add a diagnostic flag which sets the limit.
Reviewed-by: brutisso, ehelin, johnc
author | mgerdin |
---|---|
date | Thu, 28 Mar 2013 10:27:28 +0100 |
parents | ad747ee9d0b1 |
children | 24ef5fb05e0f |
rev | line source |
---|---|
342 | 1 /* |
4783
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
2 * Copyright (c) 2001, 2012, 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 * | |
1552
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
trims
parents:
1547
diff
changeset
|
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
trims
parents:
1547
diff
changeset
|
20 * or visit www.oracle.com if you need additional information or have any |
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
trims
parents:
1547
diff
changeset
|
21 * questions. |
342 | 22 * |
23 */ | |
24 | |
1972 | 25 #include "precompiled.hpp" |
26 #include "code/icBuffer.hpp" | |
27 #include "gc_implementation/g1/bufferingOopClosure.hpp" | |
28 #include "gc_implementation/g1/concurrentG1Refine.hpp" | |
29 #include "gc_implementation/g1/concurrentG1RefineThread.hpp" | |
30 #include "gc_implementation/g1/concurrentMarkThread.inline.hpp" | |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
31 #include "gc_implementation/g1/g1AllocRegion.inline.hpp" |
1972 | 32 #include "gc_implementation/g1/g1CollectedHeap.inline.hpp" |
33 #include "gc_implementation/g1/g1CollectorPolicy.hpp" | |
3914
20213c8a3c40
7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents:
3886
diff
changeset
|
34 #include "gc_implementation/g1/g1ErgoVerbose.hpp" |
4783
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
35 #include "gc_implementation/g1/g1EvacFailure.hpp" |
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
36 #include "gc_implementation/g1/g1GCPhaseTimes.hpp" |
6007
5c86f8211d1e
7160728: Introduce an extra logging level for G1 logging
brutisso
parents:
5987
diff
changeset
|
37 #include "gc_implementation/g1/g1Log.hpp" |
1972 | 38 #include "gc_implementation/g1/g1MarkSweep.hpp" |
39 #include "gc_implementation/g1/g1OopClosures.inline.hpp" | |
40 #include "gc_implementation/g1/g1RemSet.inline.hpp" | |
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
41 #include "gc_implementation/g1/heapRegion.inline.hpp" |
1972 | 42 #include "gc_implementation/g1/heapRegionRemSet.hpp" |
43 #include "gc_implementation/g1/heapRegionSeq.inline.hpp" | |
44 #include "gc_implementation/g1/vm_operations_g1.hpp" | |
45 #include "gc_implementation/shared/isGCActiveMark.hpp" | |
46 #include "memory/gcLocker.inline.hpp" | |
47 #include "memory/genOopClosures.inline.hpp" | |
48 #include "memory/generationSpec.hpp" | |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
49 #include "memory/referenceProcessor.hpp" |
1972 | 50 #include "oops/oop.inline.hpp" |
51 #include "oops/oop.pcgc.inline.hpp" | |
52 #include "runtime/aprofiler.hpp" | |
53 #include "runtime/vmThread.hpp" | |
342 | 54 |
942
2c79770d1f6e
6819085: G1: use larger and/or user settable region size
tonyp
parents:
941
diff
changeset
|
55 size_t G1CollectedHeap::_humongous_object_threshold_in_words = 0; |
2c79770d1f6e
6819085: G1: use larger and/or user settable region size
tonyp
parents:
941
diff
changeset
|
56 |
342 | 57 // turn it on so that the contents of the young list (scan-only / |
58 // to-be-collected) are printed at "strategic" points before / during | |
59 // / after the collection --- this is useful for debugging | |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
60 #define YOUNG_LIST_VERBOSE 0 |
342 | 61 // CURRENT STATUS |
62 // This file is under construction. Search for "FIXME". | |
63 | |
64 // INVARIANTS/NOTES | |
65 // | |
66 // All allocation activity covered by the G1CollectedHeap interface is | |
1973 | 67 // serialized by acquiring the HeapLock. This happens in mem_allocate |
68 // and allocate_new_tlab, which are the "entry" points to the | |
69 // allocation code from the rest of the JVM. (Note that this does not | |
70 // apply to TLAB allocation, which is not part of this interface: it | |
71 // is done by clients of this interface.) | |
342 | 72 |
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
73 // Notes on implementation of parallelism in different tasks. |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
74 // |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
75 // G1ParVerifyTask uses heap_region_par_iterate_chunked() for parallelism. |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
76 // The number of GC workers is passed to heap_region_par_iterate_chunked(). |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
77 // It does use run_task() which sets _n_workers in the task. |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
78 // G1ParTask executes g1_process_strong_roots() -> |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
79 // SharedHeap::process_strong_roots() which calls eventuall to |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
80 // CardTableModRefBS::par_non_clean_card_iterate_work() which uses |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
81 // SequentialSubTasksDone. SharedHeap::process_strong_roots() also |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
82 // directly uses SubTasksDone (_process_strong_tasks field in SharedHeap). |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
83 // |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
84 |
342 | 85 // Local to this file. |
86 | |
87 class RefineCardTableEntryClosure: public CardTableEntryClosure { | |
88 SuspendibleThreadSet* _sts; | |
89 G1RemSet* _g1rs; | |
90 ConcurrentG1Refine* _cg1r; | |
91 bool _concurrent; | |
92 public: | |
93 RefineCardTableEntryClosure(SuspendibleThreadSet* sts, | |
94 G1RemSet* g1rs, | |
95 ConcurrentG1Refine* cg1r) : | |
96 _sts(sts), _g1rs(g1rs), _cg1r(cg1r), _concurrent(true) | |
97 {} | |
98 bool do_card_ptr(jbyte* card_ptr, int worker_i) { | |
1705 | 99 bool oops_into_cset = _g1rs->concurrentRefineOneCard(card_ptr, worker_i, false); |
100 // This path is executed by the concurrent refine or mutator threads, | |
101 // concurrently, and so we do not care if card_ptr contains references | |
102 // that point into the collection set. | |
103 assert(!oops_into_cset, "should be"); | |
104 | |
342 | 105 if (_concurrent && _sts->should_yield()) { |
106 // Caller will actually yield. | |
107 return false; | |
108 } | |
109 // Otherwise, we finished successfully; return true. | |
110 return true; | |
111 } | |
112 void set_concurrent(bool b) { _concurrent = b; } | |
113 }; | |
114 | |
115 | |
116 class ClearLoggedCardTableEntryClosure: public CardTableEntryClosure { | |
117 int _calls; | |
118 G1CollectedHeap* _g1h; | |
119 CardTableModRefBS* _ctbs; | |
120 int _histo[256]; | |
121 public: | |
122 ClearLoggedCardTableEntryClosure() : | |
123 _calls(0) | |
124 { | |
125 _g1h = G1CollectedHeap::heap(); | |
126 _ctbs = (CardTableModRefBS*)_g1h->barrier_set(); | |
127 for (int i = 0; i < 256; i++) _histo[i] = 0; | |
128 } | |
129 bool do_card_ptr(jbyte* card_ptr, int worker_i) { | |
130 if (_g1h->is_in_reserved(_ctbs->addr_for(card_ptr))) { | |
131 _calls++; | |
132 unsigned char* ujb = (unsigned char*)card_ptr; | |
133 int ind = (int)(*ujb); | |
134 _histo[ind]++; | |
135 *card_ptr = -1; | |
136 } | |
137 return true; | |
138 } | |
139 int calls() { return _calls; } | |
140 void print_histo() { | |
141 gclog_or_tty->print_cr("Card table value histogram:"); | |
142 for (int i = 0; i < 256; i++) { | |
143 if (_histo[i] != 0) { | |
144 gclog_or_tty->print_cr(" %d: %d", i, _histo[i]); | |
145 } | |
146 } | |
147 } | |
148 }; | |
149 | |
150 class RedirtyLoggedCardTableEntryClosure: public CardTableEntryClosure { | |
151 int _calls; | |
152 G1CollectedHeap* _g1h; | |
153 CardTableModRefBS* _ctbs; | |
154 public: | |
155 RedirtyLoggedCardTableEntryClosure() : | |
156 _calls(0) | |
157 { | |
158 _g1h = G1CollectedHeap::heap(); | |
159 _ctbs = (CardTableModRefBS*)_g1h->barrier_set(); | |
160 } | |
161 bool do_card_ptr(jbyte* card_ptr, int worker_i) { | |
162 if (_g1h->is_in_reserved(_ctbs->addr_for(card_ptr))) { | |
163 _calls++; | |
164 *card_ptr = 0; | |
165 } | |
166 return true; | |
167 } | |
168 int calls() { return _calls; } | |
169 }; | |
170 | |
616
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
171 class RedirtyLoggedCardTableEntryFastClosure : public CardTableEntryClosure { |
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
172 public: |
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
173 bool do_card_ptr(jbyte* card_ptr, int worker_i) { |
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
174 *card_ptr = CardTableModRefBS::dirty_card_val(); |
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
175 return true; |
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
176 } |
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
177 }; |
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
178 |
4837
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
179 YoungList::YoungList(G1CollectedHeap* g1h) : |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
180 _g1h(g1h), _head(NULL), _length(0), _last_sampled_rs_lengths(0), |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
181 _survivor_head(NULL), _survivor_tail(NULL), _survivor_length(0) { |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
182 guarantee(check_list_empty(false), "just making sure..."); |
342 | 183 } |
184 | |
185 void YoungList::push_region(HeapRegion *hr) { | |
186 assert(!hr->is_young(), "should not already be young"); | |
187 assert(hr->get_next_young_region() == NULL, "cause it should!"); | |
188 | |
189 hr->set_next_young_region(_head); | |
190 _head = hr; | |
191 | |
4090
a88de71c4e3a
7097002: G1: remove a lot of unused / redundant code from the G1CollectorPolicy class
tonyp
parents:
4073
diff
changeset
|
192 _g1h->g1_policy()->set_region_eden(hr, (int) _length); |
342 | 193 ++_length; |
194 } | |
195 | |
196 void YoungList::add_survivor_region(HeapRegion* hr) { | |
545 | 197 assert(hr->is_survivor(), "should be flagged as survivor region"); |
342 | 198 assert(hr->get_next_young_region() == NULL, "cause it should!"); |
199 | |
200 hr->set_next_young_region(_survivor_head); | |
201 if (_survivor_head == NULL) { | |
545 | 202 _survivor_tail = hr; |
342 | 203 } |
204 _survivor_head = hr; | |
205 ++_survivor_length; | |
206 } | |
207 | |
208 void YoungList::empty_list(HeapRegion* list) { | |
209 while (list != NULL) { | |
210 HeapRegion* next = list->get_next_young_region(); | |
211 list->set_next_young_region(NULL); | |
212 list->uninstall_surv_rate_group(); | |
213 list->set_not_young(); | |
214 list = next; | |
215 } | |
216 } | |
217 | |
218 void YoungList::empty_list() { | |
219 assert(check_list_well_formed(), "young list should be well formed"); | |
220 | |
221 empty_list(_head); | |
222 _head = NULL; | |
223 _length = 0; | |
224 | |
225 empty_list(_survivor_head); | |
226 _survivor_head = NULL; | |
545 | 227 _survivor_tail = NULL; |
342 | 228 _survivor_length = 0; |
229 | |
230 _last_sampled_rs_lengths = 0; | |
231 | |
232 assert(check_list_empty(false), "just making sure..."); | |
233 } | |
234 | |
235 bool YoungList::check_list_well_formed() { | |
236 bool ret = true; | |
237 | |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
238 uint length = 0; |
342 | 239 HeapRegion* curr = _head; |
240 HeapRegion* last = NULL; | |
241 while (curr != NULL) { | |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
242 if (!curr->is_young()) { |
342 | 243 gclog_or_tty->print_cr("### YOUNG REGION "PTR_FORMAT"-"PTR_FORMAT" " |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
244 "incorrectly tagged (y: %d, surv: %d)", |
342 | 245 curr->bottom(), curr->end(), |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
246 curr->is_young(), curr->is_survivor()); |
342 | 247 ret = false; |
248 } | |
249 ++length; | |
250 last = curr; | |
251 curr = curr->get_next_young_region(); | |
252 } | |
253 ret = ret && (length == _length); | |
254 | |
255 if (!ret) { | |
256 gclog_or_tty->print_cr("### YOUNG LIST seems not well formed!"); | |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
257 gclog_or_tty->print_cr("### list has %u entries, _length is %u", |
342 | 258 length, _length); |
259 } | |
260 | |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
261 return ret; |
342 | 262 } |
263 | |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
264 bool YoungList::check_list_empty(bool check_sample) { |
342 | 265 bool ret = true; |
266 | |
267 if (_length != 0) { | |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
268 gclog_or_tty->print_cr("### YOUNG LIST should have 0 length, not %u", |
342 | 269 _length); |
270 ret = false; | |
271 } | |
272 if (check_sample && _last_sampled_rs_lengths != 0) { | |
273 gclog_or_tty->print_cr("### YOUNG LIST has non-zero last sampled RS lengths"); | |
274 ret = false; | |
275 } | |
276 if (_head != NULL) { | |
277 gclog_or_tty->print_cr("### YOUNG LIST does not have a NULL head"); | |
278 ret = false; | |
279 } | |
280 if (!ret) { | |
281 gclog_or_tty->print_cr("### YOUNG LIST does not seem empty"); | |
282 } | |
283 | |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
284 return ret; |
342 | 285 } |
286 | |
287 void | |
288 YoungList::rs_length_sampling_init() { | |
289 _sampled_rs_lengths = 0; | |
290 _curr = _head; | |
291 } | |
292 | |
293 bool | |
294 YoungList::rs_length_sampling_more() { | |
295 return _curr != NULL; | |
296 } | |
297 | |
298 void | |
299 YoungList::rs_length_sampling_next() { | |
300 assert( _curr != NULL, "invariant" ); | |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
301 size_t rs_length = _curr->rem_set()->occupied(); |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
302 |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
303 _sampled_rs_lengths += rs_length; |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
304 |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
305 // The current region may not yet have been added to the |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
306 // incremental collection set (it gets added when it is |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
307 // retired as the current allocation region). |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
308 if (_curr->in_collection_set()) { |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
309 // Update the collection set policy information for this region |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
310 _g1h->g1_policy()->update_incremental_cset_info(_curr, rs_length); |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
311 } |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
312 |
342 | 313 _curr = _curr->get_next_young_region(); |
314 if (_curr == NULL) { | |
315 _last_sampled_rs_lengths = _sampled_rs_lengths; | |
316 // gclog_or_tty->print_cr("last sampled RS lengths = %d", _last_sampled_rs_lengths); | |
317 } | |
318 } | |
319 | |
320 void | |
321 YoungList::reset_auxilary_lists() { | |
322 guarantee( is_empty(), "young list should be empty" ); | |
323 assert(check_list_well_formed(), "young list should be well formed"); | |
324 | |
325 // Add survivor regions to SurvRateGroup. | |
326 _g1h->g1_policy()->note_start_adding_survivor_regions(); | |
545 | 327 _g1h->g1_policy()->finished_recalculating_age_indexes(true /* is_survivors */); |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
328 |
4090
a88de71c4e3a
7097002: G1: remove a lot of unused / redundant code from the G1CollectorPolicy class
tonyp
parents:
4073
diff
changeset
|
329 int young_index_in_cset = 0; |
342 | 330 for (HeapRegion* curr = _survivor_head; |
331 curr != NULL; | |
332 curr = curr->get_next_young_region()) { | |
4090
a88de71c4e3a
7097002: G1: remove a lot of unused / redundant code from the G1CollectorPolicy class
tonyp
parents:
4073
diff
changeset
|
333 _g1h->g1_policy()->set_region_survivor(curr, young_index_in_cset); |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
334 |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
335 // The region is a non-empty survivor so let's add it to |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
336 // the incremental collection set for the next evacuation |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
337 // pause. |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
338 _g1h->g1_policy()->add_region_to_incremental_cset_rhs(curr); |
4090
a88de71c4e3a
7097002: G1: remove a lot of unused / redundant code from the G1CollectorPolicy class
tonyp
parents:
4073
diff
changeset
|
339 young_index_in_cset += 1; |
a88de71c4e3a
7097002: G1: remove a lot of unused / redundant code from the G1CollectorPolicy class
tonyp
parents:
4073
diff
changeset
|
340 } |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
341 assert((uint) young_index_in_cset == _survivor_length, "post-condition"); |
342 | 342 _g1h->g1_policy()->note_stop_adding_survivor_regions(); |
343 | |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
344 _head = _survivor_head; |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
345 _length = _survivor_length; |
342 | 346 if (_survivor_head != NULL) { |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
347 assert(_survivor_tail != NULL, "cause it shouldn't be"); |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
348 assert(_survivor_length > 0, "invariant"); |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
349 _survivor_tail->set_next_young_region(NULL); |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
350 } |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
351 |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
352 // Don't clear the survivor list handles until the start of |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
353 // the next evacuation pause - we need it in order to re-tag |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
354 // the survivor regions from this evacuation pause as 'young' |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
355 // at the start of the next. |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
356 |
545 | 357 _g1h->g1_policy()->finished_recalculating_age_indexes(false /* is_survivors */); |
342 | 358 |
359 assert(check_list_well_formed(), "young list should be well formed"); | |
360 } | |
361 | |
362 void YoungList::print() { | |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
363 HeapRegion* lists[] = {_head, _survivor_head}; |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
364 const char* names[] = {"YOUNG", "SURVIVOR"}; |
342 | 365 |
366 for (unsigned int list = 0; list < ARRAY_SIZE(lists); ++list) { | |
367 gclog_or_tty->print_cr("%s LIST CONTENTS", names[list]); | |
368 HeapRegion *curr = lists[list]; | |
369 if (curr == NULL) | |
370 gclog_or_tty->print_cr(" empty"); | |
371 while (curr != NULL) { | |
6027
8a2e5a6a19a4
7143490: G1: Remove HeapRegion::_top_at_conc_mark_count
johnc
parents:
6011
diff
changeset
|
372 gclog_or_tty->print_cr(" "HR_FORMAT", P: "PTR_FORMAT "N: "PTR_FORMAT", age: %4d", |
8a2e5a6a19a4
7143490: G1: Remove HeapRegion::_top_at_conc_mark_count
johnc
parents:
6011
diff
changeset
|
373 HR_FORMAT_PARAMS(curr), |
342 | 374 curr->prev_top_at_mark_start(), |
375 curr->next_top_at_mark_start(), | |
6027
8a2e5a6a19a4
7143490: G1: Remove HeapRegion::_top_at_conc_mark_count
johnc
parents:
6011
diff
changeset
|
376 curr->age_in_surv_rate_group_cond()); |
342 | 377 curr = curr->get_next_young_region(); |
378 } | |
379 } | |
380 | |
381 gclog_or_tty->print_cr(""); | |
382 } | |
383 | |
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
384 void G1CollectedHeap::push_dirty_cards_region(HeapRegion* hr) |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
385 { |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
386 // Claim the right to put the region on the dirty cards region list |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
387 // by installing a self pointer. |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
388 HeapRegion* next = hr->get_next_dirty_cards_region(); |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
389 if (next == NULL) { |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
390 HeapRegion* res = (HeapRegion*) |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
391 Atomic::cmpxchg_ptr(hr, hr->next_dirty_cards_region_addr(), |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
392 NULL); |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
393 if (res == NULL) { |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
394 HeapRegion* head; |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
395 do { |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
396 // Put the region to the dirty cards region list. |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
397 head = _dirty_cards_region_list; |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
398 next = (HeapRegion*) |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
399 Atomic::cmpxchg_ptr(hr, &_dirty_cards_region_list, head); |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
400 if (next == head) { |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
401 assert(hr->get_next_dirty_cards_region() == hr, |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
402 "hr->get_next_dirty_cards_region() != hr"); |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
403 if (next == NULL) { |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
404 // The last region in the list points to itself. |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
405 hr->set_next_dirty_cards_region(hr); |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
406 } else { |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
407 hr->set_next_dirty_cards_region(next); |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
408 } |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
409 } |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
410 } while (next != head); |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
411 } |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
412 } |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
413 } |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
414 |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
415 HeapRegion* G1CollectedHeap::pop_dirty_cards_region() |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
416 { |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
417 HeapRegion* head; |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
418 HeapRegion* hr; |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
419 do { |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
420 head = _dirty_cards_region_list; |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
421 if (head == NULL) { |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
422 return NULL; |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
423 } |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
424 HeapRegion* new_head = head->get_next_dirty_cards_region(); |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
425 if (head == new_head) { |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
426 // The last region. |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
427 new_head = NULL; |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
428 } |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
429 hr = (HeapRegion*)Atomic::cmpxchg_ptr(new_head, &_dirty_cards_region_list, |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
430 head); |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
431 } while (hr != head); |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
432 assert(hr != NULL, "invariant"); |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
433 hr->set_next_dirty_cards_region(NULL); |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
434 return hr; |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
435 } |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
436 |
342 | 437 void G1CollectedHeap::stop_conc_gc_threads() { |
794 | 438 _cg1r->stop(); |
342 | 439 _cmThread->stop(); |
440 } | |
441 | |
3377
2aa9ddbb9e60
7041789: 30% perf regression with c2/arm following 7017732
jmasa
parents:
3356
diff
changeset
|
442 #ifdef ASSERT |
2aa9ddbb9e60
7041789: 30% perf regression with c2/arm following 7017732
jmasa
parents:
3356
diff
changeset
|
443 // A region is added to the collection set as it is retired |
2aa9ddbb9e60
7041789: 30% perf regression with c2/arm following 7017732
jmasa
parents:
3356
diff
changeset
|
444 // so an address p can point to a region which will be in the |
2aa9ddbb9e60
7041789: 30% perf regression with c2/arm following 7017732
jmasa
parents:
3356
diff
changeset
|
445 // collection set but has not yet been retired. This method |
2aa9ddbb9e60
7041789: 30% perf regression with c2/arm following 7017732
jmasa
parents:
3356
diff
changeset
|
446 // therefore is only accurate during a GC pause after all |
2aa9ddbb9e60
7041789: 30% perf regression with c2/arm following 7017732
jmasa
parents:
3356
diff
changeset
|
447 // regions have been retired. It is used for debugging |
2aa9ddbb9e60
7041789: 30% perf regression with c2/arm following 7017732
jmasa
parents:
3356
diff
changeset
|
448 // to check if an nmethod has references to objects that can |
2aa9ddbb9e60
7041789: 30% perf regression with c2/arm following 7017732
jmasa
parents:
3356
diff
changeset
|
449 // be move during a partial collection. Though it can be |
2aa9ddbb9e60
7041789: 30% perf regression with c2/arm following 7017732
jmasa
parents:
3356
diff
changeset
|
450 // inaccurate, it is sufficient for G1 because the conservative |
2aa9ddbb9e60
7041789: 30% perf regression with c2/arm following 7017732
jmasa
parents:
3356
diff
changeset
|
451 // implementation of is_scavengable() for G1 will indicate that |
2aa9ddbb9e60
7041789: 30% perf regression with c2/arm following 7017732
jmasa
parents:
3356
diff
changeset
|
452 // all nmethods must be scanned during a partial collection. |
2aa9ddbb9e60
7041789: 30% perf regression with c2/arm following 7017732
jmasa
parents:
3356
diff
changeset
|
453 bool G1CollectedHeap::is_in_partial_collection(const void* p) { |
2aa9ddbb9e60
7041789: 30% perf regression with c2/arm following 7017732
jmasa
parents:
3356
diff
changeset
|
454 HeapRegion* hr = heap_region_containing(p); |
2aa9ddbb9e60
7041789: 30% perf regression with c2/arm following 7017732
jmasa
parents:
3356
diff
changeset
|
455 return hr != NULL && hr->in_collection_set(); |
2aa9ddbb9e60
7041789: 30% perf regression with c2/arm following 7017732
jmasa
parents:
3356
diff
changeset
|
456 } |
2aa9ddbb9e60
7041789: 30% perf regression with c2/arm following 7017732
jmasa
parents:
3356
diff
changeset
|
457 #endif |
2aa9ddbb9e60
7041789: 30% perf regression with c2/arm following 7017732
jmasa
parents:
3356
diff
changeset
|
458 |
2aa9ddbb9e60
7041789: 30% perf regression with c2/arm following 7017732
jmasa
parents:
3356
diff
changeset
|
459 // Returns true if the reference points to an object that |
2aa9ddbb9e60
7041789: 30% perf regression with c2/arm following 7017732
jmasa
parents:
3356
diff
changeset
|
460 // can move in an incremental collecction. |
2aa9ddbb9e60
7041789: 30% perf regression with c2/arm following 7017732
jmasa
parents:
3356
diff
changeset
|
461 bool G1CollectedHeap::is_scavengable(const void* p) { |
2aa9ddbb9e60
7041789: 30% perf regression with c2/arm following 7017732
jmasa
parents:
3356
diff
changeset
|
462 G1CollectedHeap* g1h = G1CollectedHeap::heap(); |
2aa9ddbb9e60
7041789: 30% perf regression with c2/arm following 7017732
jmasa
parents:
3356
diff
changeset
|
463 G1CollectorPolicy* g1p = g1h->g1_policy(); |
2aa9ddbb9e60
7041789: 30% perf regression with c2/arm following 7017732
jmasa
parents:
3356
diff
changeset
|
464 HeapRegion* hr = heap_region_containing(p); |
2aa9ddbb9e60
7041789: 30% perf regression with c2/arm following 7017732
jmasa
parents:
3356
diff
changeset
|
465 if (hr == NULL) { |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
466 // null |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
467 assert(p == NULL, err_msg("Not NULL " PTR_FORMAT ,p)); |
3377
2aa9ddbb9e60
7041789: 30% perf regression with c2/arm following 7017732
jmasa
parents:
3356
diff
changeset
|
468 return false; |
2aa9ddbb9e60
7041789: 30% perf regression with c2/arm following 7017732
jmasa
parents:
3356
diff
changeset
|
469 } else { |
2aa9ddbb9e60
7041789: 30% perf regression with c2/arm following 7017732
jmasa
parents:
3356
diff
changeset
|
470 return !hr->isHumongous(); |
2aa9ddbb9e60
7041789: 30% perf regression with c2/arm following 7017732
jmasa
parents:
3356
diff
changeset
|
471 } |
2aa9ddbb9e60
7041789: 30% perf regression with c2/arm following 7017732
jmasa
parents:
3356
diff
changeset
|
472 } |
2aa9ddbb9e60
7041789: 30% perf regression with c2/arm following 7017732
jmasa
parents:
3356
diff
changeset
|
473 |
342 | 474 void G1CollectedHeap::check_ct_logs_at_safepoint() { |
475 DirtyCardQueueSet& dcqs = JavaThread::dirty_card_queue_set(); | |
476 CardTableModRefBS* ct_bs = (CardTableModRefBS*)barrier_set(); | |
477 | |
478 // Count the dirty cards at the start. | |
479 CountNonCleanMemRegionClosure count1(this); | |
480 ct_bs->mod_card_iterate(&count1); | |
481 int orig_count = count1.n(); | |
482 | |
483 // First clear the logged cards. | |
484 ClearLoggedCardTableEntryClosure clear; | |
485 dcqs.set_closure(&clear); | |
486 dcqs.apply_closure_to_all_completed_buffers(); | |
487 dcqs.iterate_closure_all_threads(false); | |
488 clear.print_histo(); | |
489 | |
490 // Now ensure that there's no dirty cards. | |
491 CountNonCleanMemRegionClosure count2(this); | |
492 ct_bs->mod_card_iterate(&count2); | |
493 if (count2.n() != 0) { | |
494 gclog_or_tty->print_cr("Card table has %d entries; %d originally", | |
495 count2.n(), orig_count); | |
496 } | |
497 guarantee(count2.n() == 0, "Card table should be clean."); | |
498 | |
499 RedirtyLoggedCardTableEntryClosure redirty; | |
500 JavaThread::dirty_card_queue_set().set_closure(&redirty); | |
501 dcqs.apply_closure_to_all_completed_buffers(); | |
502 dcqs.iterate_closure_all_threads(false); | |
503 gclog_or_tty->print_cr("Log entries = %d, dirty cards = %d.", | |
504 clear.calls(), orig_count); | |
505 guarantee(redirty.calls() == clear.calls(), | |
506 "Or else mechanism is broken."); | |
507 | |
508 CountNonCleanMemRegionClosure count3(this); | |
509 ct_bs->mod_card_iterate(&count3); | |
510 if (count3.n() != orig_count) { | |
511 gclog_or_tty->print_cr("Should have restored them all: orig = %d, final = %d.", | |
512 orig_count, count3.n()); | |
513 guarantee(count3.n() >= orig_count, "Should have restored them all."); | |
514 } | |
515 | |
516 JavaThread::dirty_card_queue_set().set_closure(_refine_cte_cl); | |
517 } | |
518 | |
519 // Private class members. | |
520 | |
521 G1CollectedHeap* G1CollectedHeap::_g1h; | |
522 | |
523 // Private methods. | |
524 | |
2152 | 525 HeapRegion* |
2361 | 526 G1CollectedHeap::new_region_try_secondary_free_list() { |
2152 | 527 MutexLockerEx x(SecondaryFreeList_lock, Mutex::_no_safepoint_check_flag); |
528 while (!_secondary_free_list.is_empty() || free_regions_coming()) { | |
529 if (!_secondary_free_list.is_empty()) { | |
530 if (G1ConcRegionFreeingVerbose) { | |
531 gclog_or_tty->print_cr("G1ConcRegionFreeing [region alloc] : " | |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
532 "secondary_free_list has %u entries", |
2152 | 533 _secondary_free_list.length()); |
534 } | |
535 // It looks as if there are free regions available on the | |
536 // secondary_free_list. Let's move them to the free_list and try | |
537 // again to allocate from it. | |
538 append_secondary_free_list(); | |
539 | |
540 assert(!_free_list.is_empty(), "if the secondary_free_list was not " | |
541 "empty we should have moved at least one entry to the free_list"); | |
542 HeapRegion* res = _free_list.remove_head(); | |
543 if (G1ConcRegionFreeingVerbose) { | |
544 gclog_or_tty->print_cr("G1ConcRegionFreeing [region alloc] : " | |
545 "allocated "HR_FORMAT" from secondary_free_list", | |
546 HR_FORMAT_PARAMS(res)); | |
547 } | |
548 return res; | |
549 } | |
550 | |
551 // Wait here until we get notifed either when (a) there are no | |
552 // more free regions coming or (b) some regions have been moved on | |
553 // the secondary_free_list. | |
554 SecondaryFreeList_lock->wait(Mutex::_no_safepoint_check_flag); | |
555 } | |
556 | |
557 if (G1ConcRegionFreeingVerbose) { | |
558 gclog_or_tty->print_cr("G1ConcRegionFreeing [region alloc] : " | |
559 "could not allocate from secondary_free_list"); | |
560 } | |
561 return NULL; | |
562 } | |
563 | |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
564 HeapRegion* G1CollectedHeap::new_region(size_t word_size, bool do_expand) { |
3986
65a8ff39a6da
7095194: G1: HeapRegion::GrainBytes, GrainWords, and CardsPerRegion should be size_t
johnc
parents:
3983
diff
changeset
|
565 assert(!isHumongous(word_size) || word_size <= HeapRegion::GrainWords, |
2152 | 566 "the only time we use this to allocate a humongous region is " |
567 "when we are allocating a single humongous region"); | |
568 | |
569 HeapRegion* res; | |
570 if (G1StressConcRegionFreeing) { | |
571 if (!_secondary_free_list.is_empty()) { | |
572 if (G1ConcRegionFreeingVerbose) { | |
573 gclog_or_tty->print_cr("G1ConcRegionFreeing [region alloc] : " | |
574 "forced to look at the secondary_free_list"); | |
575 } | |
2361 | 576 res = new_region_try_secondary_free_list(); |
2152 | 577 if (res != NULL) { |
578 return res; | |
579 } | |
580 } | |
581 } | |
582 res = _free_list.remove_head_or_null(); | |
583 if (res == NULL) { | |
584 if (G1ConcRegionFreeingVerbose) { | |
585 gclog_or_tty->print_cr("G1ConcRegionFreeing [region alloc] : " | |
586 "res == NULL, trying the secondary_free_list"); | |
587 } | |
2361 | 588 res = new_region_try_secondary_free_list(); |
2152 | 589 } |
4781
bacb651cf5bf
7113006: G1: excessive ergo output when an evac failure happens
tonyp
parents:
4728
diff
changeset
|
590 if (res == NULL && do_expand && _expand_heap_after_alloc_failure) { |
bacb651cf5bf
7113006: G1: excessive ergo output when an evac failure happens
tonyp
parents:
4728
diff
changeset
|
591 // Currently, only attempts to allocate GC alloc regions set |
bacb651cf5bf
7113006: G1: excessive ergo output when an evac failure happens
tonyp
parents:
4728
diff
changeset
|
592 // do_expand to true. So, we should only reach here during a |
bacb651cf5bf
7113006: G1: excessive ergo output when an evac failure happens
tonyp
parents:
4728
diff
changeset
|
593 // safepoint. If this assumption changes we might have to |
bacb651cf5bf
7113006: G1: excessive ergo output when an evac failure happens
tonyp
parents:
4728
diff
changeset
|
594 // reconsider the use of _expand_heap_after_alloc_failure. |
bacb651cf5bf
7113006: G1: excessive ergo output when an evac failure happens
tonyp
parents:
4728
diff
changeset
|
595 assert(SafepointSynchronize::is_at_safepoint(), "invariant"); |
bacb651cf5bf
7113006: G1: excessive ergo output when an evac failure happens
tonyp
parents:
4728
diff
changeset
|
596 |
3914
20213c8a3c40
7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents:
3886
diff
changeset
|
597 ergo_verbose1(ErgoHeapSizing, |
20213c8a3c40
7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents:
3886
diff
changeset
|
598 "attempt heap expansion", |
20213c8a3c40
7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents:
3886
diff
changeset
|
599 ergo_format_reason("region allocation request failed") |
20213c8a3c40
7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents:
3886
diff
changeset
|
600 ergo_format_byte("allocation request"), |
20213c8a3c40
7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents:
3886
diff
changeset
|
601 word_size * HeapWordSize); |
2188
c33825b68624
6923430: G1: assert(res != 0,"This should have worked.")
johnc
parents:
2173
diff
changeset
|
602 if (expand(word_size * HeapWordSize)) { |
4781
bacb651cf5bf
7113006: G1: excessive ergo output when an evac failure happens
tonyp
parents:
4728
diff
changeset
|
603 // Given that expand() succeeded in expanding the heap, and we |
bacb651cf5bf
7113006: G1: excessive ergo output when an evac failure happens
tonyp
parents:
4728
diff
changeset
|
604 // always expand the heap by an amount aligned to the heap |
bacb651cf5bf
7113006: G1: excessive ergo output when an evac failure happens
tonyp
parents:
4728
diff
changeset
|
605 // region size, the free list should in theory not be empty. So |
bacb651cf5bf
7113006: G1: excessive ergo output when an evac failure happens
tonyp
parents:
4728
diff
changeset
|
606 // it would probably be OK to use remove_head(). But the extra |
bacb651cf5bf
7113006: G1: excessive ergo output when an evac failure happens
tonyp
parents:
4728
diff
changeset
|
607 // check for NULL is unlikely to be a performance issue here (we |
bacb651cf5bf
7113006: G1: excessive ergo output when an evac failure happens
tonyp
parents:
4728
diff
changeset
|
608 // just expanded the heap!) so let's just be conservative and |
bacb651cf5bf
7113006: G1: excessive ergo output when an evac failure happens
tonyp
parents:
4728
diff
changeset
|
609 // use remove_head_or_null(). |
3766 | 610 res = _free_list.remove_head_or_null(); |
4781
bacb651cf5bf
7113006: G1: excessive ergo output when an evac failure happens
tonyp
parents:
4728
diff
changeset
|
611 } else { |
bacb651cf5bf
7113006: G1: excessive ergo output when an evac failure happens
tonyp
parents:
4728
diff
changeset
|
612 _expand_heap_after_alloc_failure = false; |
2188
c33825b68624
6923430: G1: assert(res != 0,"This should have worked.")
johnc
parents:
2173
diff
changeset
|
613 } |
342 | 614 } |
615 return res; | |
616 } | |
617 | |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
618 uint G1CollectedHeap::humongous_obj_allocate_find_first(uint num_regions, |
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
619 size_t word_size) { |
2361 | 620 assert(isHumongous(word_size), "word_size should be humongous"); |
621 assert(num_regions * HeapRegion::GrainWords >= word_size, "pre-condition"); | |
622 | |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
623 uint first = G1_NULL_HRS_INDEX; |
2152 | 624 if (num_regions == 1) { |
625 // Only one region to allocate, no need to go through the slower | |
626 // path. The caller will attempt the expasion if this fails, so | |
627 // let's not try to expand here too. | |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
628 HeapRegion* hr = new_region(word_size, false /* do_expand */); |
2152 | 629 if (hr != NULL) { |
630 first = hr->hrs_index(); | |
631 } else { | |
3766 | 632 first = G1_NULL_HRS_INDEX; |
2152 | 633 } |
634 } else { | |
635 // We can't allocate humongous regions while cleanupComplete() is | |
636 // running, since some of the regions we find to be empty might not | |
637 // yet be added to the free list and it is not straightforward to | |
638 // know which list they are on so that we can remove them. Note | |
639 // that we only need to do this if we need to allocate more than | |
640 // one region to satisfy the current humongous allocation | |
641 // request. If we are only allocating one region we use the common | |
642 // region allocation code (see above). | |
643 wait_while_free_regions_coming(); | |
2361 | 644 append_secondary_free_list_if_not_empty_with_lock(); |
2152 | 645 |
646 if (free_regions() >= num_regions) { | |
3766 | 647 first = _hrs.find_contiguous(num_regions); |
648 if (first != G1_NULL_HRS_INDEX) { | |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
649 for (uint i = first; i < first + num_regions; ++i) { |
3766 | 650 HeapRegion* hr = region_at(i); |
2152 | 651 assert(hr->is_empty(), "sanity"); |
2361 | 652 assert(is_on_master_free_list(hr), "sanity"); |
2152 | 653 hr->set_pending_removal(true); |
654 } | |
655 _free_list.remove_all_pending(num_regions); | |
656 } | |
657 } | |
658 } | |
659 return first; | |
660 } | |
661 | |
2361 | 662 HeapWord* |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
663 G1CollectedHeap::humongous_obj_allocate_initialize_regions(uint first, |
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
664 uint num_regions, |
2361 | 665 size_t word_size) { |
3766 | 666 assert(first != G1_NULL_HRS_INDEX, "pre-condition"); |
2361 | 667 assert(isHumongous(word_size), "word_size should be humongous"); |
668 assert(num_regions * HeapRegion::GrainWords >= word_size, "pre-condition"); | |
669 | |
670 // Index of last region in the series + 1. | |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
671 uint last = first + num_regions; |
2361 | 672 |
673 // We need to initialize the region(s) we just discovered. This is | |
674 // a bit tricky given that it can happen concurrently with | |
675 // refinement threads refining cards on these regions and | |
676 // potentially wanting to refine the BOT as they are scanning | |
677 // those cards (this can happen shortly after a cleanup; see CR | |
678 // 6991377). So we have to set up the region(s) carefully and in | |
679 // a specific order. | |
680 | |
681 // The word size sum of all the regions we will allocate. | |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
682 size_t word_size_sum = (size_t) num_regions * HeapRegion::GrainWords; |
2361 | 683 assert(word_size <= word_size_sum, "sanity"); |
684 | |
685 // This will be the "starts humongous" region. | |
3766 | 686 HeapRegion* first_hr = region_at(first); |
2361 | 687 // The header of the new object will be placed at the bottom of |
688 // the first region. | |
689 HeapWord* new_obj = first_hr->bottom(); | |
690 // This will be the new end of the first region in the series that | |
691 // should also match the end of the last region in the seriers. | |
692 HeapWord* new_end = new_obj + word_size_sum; | |
693 // This will be the new top of the first region that will reflect | |
694 // this allocation. | |
695 HeapWord* new_top = new_obj + word_size; | |
696 | |
697 // First, we need to zero the header of the space that we will be | |
698 // allocating. When we update top further down, some refinement | |
699 // threads might try to scan the region. By zeroing the header we | |
700 // ensure that any thread that will try to scan the region will | |
701 // come across the zero klass word and bail out. | |
702 // | |
703 // NOTE: It would not have been correct to have used | |
704 // CollectedHeap::fill_with_object() and make the space look like | |
705 // an int array. The thread that is doing the allocation will | |
706 // later update the object header to a potentially different array | |
707 // type and, for a very short period of time, the klass and length | |
708 // fields will be inconsistent. This could cause a refinement | |
709 // thread to calculate the object size incorrectly. | |
710 Copy::fill_to_words(new_obj, oopDesc::header_size(), 0); | |
711 | |
712 // We will set up the first region as "starts humongous". This | |
713 // will also update the BOT covering all the regions to reflect | |
714 // that there is a single object that starts at the bottom of the | |
715 // first region. | |
716 first_hr->set_startsHumongous(new_top, new_end); | |
717 | |
718 // Then, if there are any, we will set up the "continues | |
719 // humongous" regions. | |
720 HeapRegion* hr = NULL; | |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
721 for (uint i = first + 1; i < last; ++i) { |
3766 | 722 hr = region_at(i); |
2361 | 723 hr->set_continuesHumongous(first_hr); |
724 } | |
725 // If we have "continues humongous" regions (hr != NULL), then the | |
726 // end of the last one should match new_end. | |
727 assert(hr == NULL || hr->end() == new_end, "sanity"); | |
728 | |
729 // Up to this point no concurrent thread would have been able to | |
730 // do any scanning on any region in this series. All the top | |
731 // fields still point to bottom, so the intersection between | |
732 // [bottom,top] and [card_start,card_end] will be empty. Before we | |
733 // update the top fields, we'll do a storestore to make sure that | |
734 // no thread sees the update to top before the zeroing of the | |
735 // object header and the BOT initialization. | |
736 OrderAccess::storestore(); | |
737 | |
738 // Now that the BOT and the object header have been initialized, | |
739 // we can update top of the "starts humongous" region. | |
740 assert(first_hr->bottom() < new_top && new_top <= first_hr->end(), | |
741 "new_top should be in this region"); | |
742 first_hr->set_top(new_top); | |
3778
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
743 if (_hr_printer.is_active()) { |
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
744 HeapWord* bottom = first_hr->bottom(); |
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
745 HeapWord* end = first_hr->orig_end(); |
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
746 if ((first + 1) == last) { |
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
747 // the series has a single humongous region |
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
748 _hr_printer.alloc(G1HRPrinter::SingleHumongous, first_hr, new_top); |
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
749 } else { |
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
750 // the series has more than one humongous regions |
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
751 _hr_printer.alloc(G1HRPrinter::StartsHumongous, first_hr, end); |
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
752 } |
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
753 } |
2361 | 754 |
755 // Now, we will update the top fields of the "continues humongous" | |
756 // regions. The reason we need to do this is that, otherwise, | |
757 // these regions would look empty and this will confuse parts of | |
758 // G1. For example, the code that looks for a consecutive number | |
759 // of empty regions will consider them empty and try to | |
760 // re-allocate them. We can extend is_empty() to also include | |
761 // !continuesHumongous(), but it is easier to just update the top | |
762 // fields here. The way we set top for all regions (i.e., top == | |
763 // end for all regions but the last one, top == new_top for the | |
764 // last one) is actually used when we will free up the humongous | |
765 // region in free_humongous_region(). | |
766 hr = NULL; | |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
767 for (uint i = first + 1; i < last; ++i) { |
3766 | 768 hr = region_at(i); |
2361 | 769 if ((i + 1) == last) { |
770 // last continues humongous region | |
771 assert(hr->bottom() < new_top && new_top <= hr->end(), | |
772 "new_top should fall on this region"); | |
773 hr->set_top(new_top); | |
3778
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
774 _hr_printer.alloc(G1HRPrinter::ContinuesHumongous, hr, new_top); |
2361 | 775 } else { |
776 // not last one | |
777 assert(new_top > hr->end(), "new_top should be above this region"); | |
778 hr->set_top(hr->end()); | |
3778
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
779 _hr_printer.alloc(G1HRPrinter::ContinuesHumongous, hr, hr->end()); |
2361 | 780 } |
781 } | |
782 // If we have continues humongous regions (hr != NULL), then the | |
783 // end of the last one should match new_end and its top should | |
784 // match new_top. | |
785 assert(hr == NULL || | |
786 (hr->end() == new_end && hr->top() == new_top), "sanity"); | |
787 | |
788 assert(first_hr->used() == word_size * HeapWordSize, "invariant"); | |
789 _summary_bytes_used += first_hr->used(); | |
790 _humongous_set.add(first_hr); | |
791 | |
792 return new_obj; | |
793 } | |
794 | |
342 | 795 // If could fit into free regions w/o expansion, try. |
796 // Otherwise, if can expand, do so. | |
797 // Otherwise, if using ex regions might help, try with ex given back. | |
1973 | 798 HeapWord* G1CollectedHeap::humongous_obj_allocate(size_t word_size) { |
2152 | 799 assert_heap_locked_or_at_safepoint(true /* should_be_vm_thread */); |
800 | |
801 verify_region_sets_optional(); | |
342 | 802 |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
803 size_t word_size_rounded = round_to(word_size, HeapRegion::GrainWords); |
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
804 uint num_regions = (uint) (word_size_rounded / HeapRegion::GrainWords); |
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
805 uint x_num = expansion_regions(); |
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
806 uint fs = _hrs.free_suffix(); |
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
807 uint first = humongous_obj_allocate_find_first(num_regions, word_size); |
3766 | 808 if (first == G1_NULL_HRS_INDEX) { |
2152 | 809 // The only thing we can do now is attempt expansion. |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
810 if (fs + x_num >= num_regions) { |
2188
c33825b68624
6923430: G1: assert(res != 0,"This should have worked.")
johnc
parents:
2173
diff
changeset
|
811 // If the number of regions we're trying to allocate for this |
c33825b68624
6923430: G1: assert(res != 0,"This should have worked.")
johnc
parents:
2173
diff
changeset
|
812 // object is at most the number of regions in the free suffix, |
c33825b68624
6923430: G1: assert(res != 0,"This should have worked.")
johnc
parents:
2173
diff
changeset
|
813 // then the call to humongous_obj_allocate_find_first() above |
c33825b68624
6923430: G1: assert(res != 0,"This should have worked.")
johnc
parents:
2173
diff
changeset
|
814 // should have succeeded and we wouldn't be here. |
c33825b68624
6923430: G1: assert(res != 0,"This should have worked.")
johnc
parents:
2173
diff
changeset
|
815 // |
c33825b68624
6923430: G1: assert(res != 0,"This should have worked.")
johnc
parents:
2173
diff
changeset
|
816 // We should only be trying to expand when the free suffix is |
c33825b68624
6923430: G1: assert(res != 0,"This should have worked.")
johnc
parents:
2173
diff
changeset
|
817 // not sufficient for the object _and_ we have some expansion |
c33825b68624
6923430: G1: assert(res != 0,"This should have worked.")
johnc
parents:
2173
diff
changeset
|
818 // room available. |
c33825b68624
6923430: G1: assert(res != 0,"This should have worked.")
johnc
parents:
2173
diff
changeset
|
819 assert(num_regions > fs, "earlier allocation should have succeeded"); |
c33825b68624
6923430: G1: assert(res != 0,"This should have worked.")
johnc
parents:
2173
diff
changeset
|
820 |
3914
20213c8a3c40
7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents:
3886
diff
changeset
|
821 ergo_verbose1(ErgoHeapSizing, |
20213c8a3c40
7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents:
3886
diff
changeset
|
822 "attempt heap expansion", |
20213c8a3c40
7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents:
3886
diff
changeset
|
823 ergo_format_reason("humongous allocation request failed") |
20213c8a3c40
7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents:
3886
diff
changeset
|
824 ergo_format_byte("allocation request"), |
20213c8a3c40
7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents:
3886
diff
changeset
|
825 word_size * HeapWordSize); |
2188
c33825b68624
6923430: G1: assert(res != 0,"This should have worked.")
johnc
parents:
2173
diff
changeset
|
826 if (expand((num_regions - fs) * HeapRegion::GrainBytes)) { |
3766 | 827 // Even though the heap was expanded, it might not have |
828 // reached the desired size. So, we cannot assume that the | |
829 // allocation will succeed. | |
2188
c33825b68624
6923430: G1: assert(res != 0,"This should have worked.")
johnc
parents:
2173
diff
changeset
|
830 first = humongous_obj_allocate_find_first(num_regions, word_size); |
c33825b68624
6923430: G1: assert(res != 0,"This should have worked.")
johnc
parents:
2173
diff
changeset
|
831 } |
2152 | 832 } |
833 } | |
834 | |
2361 | 835 HeapWord* result = NULL; |
3766 | 836 if (first != G1_NULL_HRS_INDEX) { |
2361 | 837 result = |
838 humongous_obj_allocate_initialize_regions(first, num_regions, word_size); | |
839 assert(result != NULL, "it should always return a valid result"); | |
3980
8229bd737950
7075646: G1: fix inconsistencies in the monitoring data
tonyp
parents:
3979
diff
changeset
|
840 |
8229bd737950
7075646: G1: fix inconsistencies in the monitoring data
tonyp
parents:
3979
diff
changeset
|
841 // A successful humongous object allocation changes the used space |
8229bd737950
7075646: G1: fix inconsistencies in the monitoring data
tonyp
parents:
3979
diff
changeset
|
842 // information of the old generation so we need to recalculate the |
8229bd737950
7075646: G1: fix inconsistencies in the monitoring data
tonyp
parents:
3979
diff
changeset
|
843 // sizes and update the jstat counters here. |
8229bd737950
7075646: G1: fix inconsistencies in the monitoring data
tonyp
parents:
3979
diff
changeset
|
844 g1mm()->update_sizes(); |
2152 | 845 } |
846 | |
847 verify_region_sets_optional(); | |
2361 | 848 |
849 return result; | |
342 | 850 } |
851 | |
1973 | 852 HeapWord* G1CollectedHeap::allocate_new_tlab(size_t word_size) { |
853 assert_heap_not_locked_and_not_at_safepoint(); | |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
854 assert(!isHumongous(word_size), "we do not allow humongous TLABs"); |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
855 |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
856 unsigned int dummy_gc_count_before; |
8853
2e093b564241
7014552: gc/lock/jni/jnilockXXX works too slow on 1-processor machine
mgerdin
parents:
8038
diff
changeset
|
857 int dummy_gclocker_retry_count = 0; |
2e093b564241
7014552: gc/lock/jni/jnilockXXX works too slow on 1-processor machine
mgerdin
parents:
8038
diff
changeset
|
858 return attempt_allocation(word_size, &dummy_gc_count_before, &dummy_gclocker_retry_count); |
342 | 859 } |
860 | |
861 HeapWord* | |
862 G1CollectedHeap::mem_allocate(size_t word_size, | |
1973 | 863 bool* gc_overhead_limit_was_exceeded) { |
864 assert_heap_not_locked_and_not_at_safepoint(); | |
342 | 865 |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
866 // Loop until the allocation is satisified, or unsatisfied after GC. |
8853
2e093b564241
7014552: gc/lock/jni/jnilockXXX works too slow on 1-processor machine
mgerdin
parents:
8038
diff
changeset
|
867 for (int try_count = 1, gclocker_retry_count = 0; /* we'll return */; try_count += 1) { |
1973 | 868 unsigned int gc_count_before; |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
869 |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
870 HeapWord* result = NULL; |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
871 if (!isHumongous(word_size)) { |
8853
2e093b564241
7014552: gc/lock/jni/jnilockXXX works too slow on 1-processor machine
mgerdin
parents:
8038
diff
changeset
|
872 result = attempt_allocation(word_size, &gc_count_before, &gclocker_retry_count); |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
873 } else { |
8853
2e093b564241
7014552: gc/lock/jni/jnilockXXX works too slow on 1-processor machine
mgerdin
parents:
8038
diff
changeset
|
874 result = attempt_allocation_humongous(word_size, &gc_count_before, &gclocker_retry_count); |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
875 } |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
876 if (result != NULL) { |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
877 return result; |
342 | 878 } |
879 | |
880 // Create the garbage collection operation... | |
1973 | 881 VM_G1CollectForAllocation op(gc_count_before, word_size); |
342 | 882 // ...and get the VM thread to execute it. |
883 VMThread::execute(&op); | |
1973 | 884 |
885 if (op.prologue_succeeded() && op.pause_succeeded()) { | |
886 // If the operation was successful we'll return the result even | |
887 // if it is NULL. If the allocation attempt failed immediately | |
888 // after a Full GC, it's unlikely we'll be able to allocate now. | |
889 HeapWord* result = op.result(); | |
890 if (result != NULL && !isHumongous(word_size)) { | |
891 // Allocations that take place on VM operations do not do any | |
892 // card dirtying and we have to do it here. We only have to do | |
893 // this for non-humongous allocations, though. | |
894 dirty_young_block(result, word_size); | |
895 } | |
342 | 896 return result; |
1973 | 897 } else { |
8853
2e093b564241
7014552: gc/lock/jni/jnilockXXX works too slow on 1-processor machine
mgerdin
parents:
8038
diff
changeset
|
898 if (gclocker_retry_count > GCLockerRetryAllocationCount) { |
2e093b564241
7014552: gc/lock/jni/jnilockXXX works too slow on 1-processor machine
mgerdin
parents:
8038
diff
changeset
|
899 return NULL; |
2e093b564241
7014552: gc/lock/jni/jnilockXXX works too slow on 1-processor machine
mgerdin
parents:
8038
diff
changeset
|
900 } |
1973 | 901 assert(op.result() == NULL, |
902 "the result should be NULL if the VM op did not succeed"); | |
342 | 903 } |
904 | |
905 // Give a warning if we seem to be looping forever. | |
906 if ((QueuedAllocationWarningCount > 0) && | |
907 (try_count % QueuedAllocationWarningCount == 0)) { | |
1973 | 908 warning("G1CollectedHeap::mem_allocate retries %d times", try_count); |
342 | 909 } |
910 } | |
1973 | 911 |
912 ShouldNotReachHere(); | |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
913 return NULL; |
342 | 914 } |
915 | |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
916 HeapWord* G1CollectedHeap::attempt_allocation_slow(size_t word_size, |
8853
2e093b564241
7014552: gc/lock/jni/jnilockXXX works too slow on 1-processor machine
mgerdin
parents:
8038
diff
changeset
|
917 unsigned int *gc_count_before_ret, |
2e093b564241
7014552: gc/lock/jni/jnilockXXX works too slow on 1-processor machine
mgerdin
parents:
8038
diff
changeset
|
918 int* gclocker_retry_count_ret) { |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
919 // Make sure you read the note in attempt_allocation_humongous(). |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
920 |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
921 assert_heap_not_locked_and_not_at_safepoint(); |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
922 assert(!isHumongous(word_size), "attempt_allocation_slow() should not " |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
923 "be called for humongous allocation requests"); |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
924 |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
925 // We should only get here after the first-level allocation attempt |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
926 // (attempt_allocation()) failed to allocate. |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
927 |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
928 // We will loop until a) we manage to successfully perform the |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
929 // allocation or b) we successfully schedule a collection which |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
930 // fails to perform the allocation. b) is the only case when we'll |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
931 // return NULL. |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
932 HeapWord* result = NULL; |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
933 for (int try_count = 1; /* we'll return */; try_count += 1) { |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
934 bool should_try_gc; |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
935 unsigned int gc_count_before; |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
936 |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
937 { |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
938 MutexLockerEx x(Heap_lock); |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
939 |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
940 result = _mutator_alloc_region.attempt_allocation_locked(word_size, |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
941 false /* bot_updates */); |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
942 if (result != NULL) { |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
943 return result; |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
944 } |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
945 |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
946 // If we reach here, attempt_allocation_locked() above failed to |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
947 // allocate a new region. So the mutator alloc region should be NULL. |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
948 assert(_mutator_alloc_region.get() == NULL, "only way to get here"); |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
949 |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
950 if (GC_locker::is_active_and_needs_gc()) { |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
951 if (g1_policy()->can_expand_young_list()) { |
3914
20213c8a3c40
7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents:
3886
diff
changeset
|
952 // No need for an ergo verbose message here, |
20213c8a3c40
7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents:
3886
diff
changeset
|
953 // can_expand_young_list() does this when it returns true. |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
954 result = _mutator_alloc_region.attempt_allocation_force(word_size, |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
955 false /* bot_updates */); |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
956 if (result != NULL) { |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
957 return result; |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
958 } |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
959 } |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
960 should_try_gc = false; |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
961 } else { |
6106
1d478c993020
7143858: G1: Back to back young GCs with the second GC having a minimally sized eden
johnc
parents:
6064
diff
changeset
|
962 // The GCLocker may not be active but the GCLocker initiated |
1d478c993020
7143858: G1: Back to back young GCs with the second GC having a minimally sized eden
johnc
parents:
6064
diff
changeset
|
963 // GC may not yet have been performed (GCLocker::needs_gc() |
1d478c993020
7143858: G1: Back to back young GCs with the second GC having a minimally sized eden
johnc
parents:
6064
diff
changeset
|
964 // returns true). In this case we do not try this GC and |
1d478c993020
7143858: G1: Back to back young GCs with the second GC having a minimally sized eden
johnc
parents:
6064
diff
changeset
|
965 // wait until the GCLocker initiated GC is performed, and |
1d478c993020
7143858: G1: Back to back young GCs with the second GC having a minimally sized eden
johnc
parents:
6064
diff
changeset
|
966 // then retry the allocation. |
1d478c993020
7143858: G1: Back to back young GCs with the second GC having a minimally sized eden
johnc
parents:
6064
diff
changeset
|
967 if (GC_locker::needs_gc()) { |
1d478c993020
7143858: G1: Back to back young GCs with the second GC having a minimally sized eden
johnc
parents:
6064
diff
changeset
|
968 should_try_gc = false; |
1d478c993020
7143858: G1: Back to back young GCs with the second GC having a minimally sized eden
johnc
parents:
6064
diff
changeset
|
969 } else { |
1d478c993020
7143858: G1: Back to back young GCs with the second GC having a minimally sized eden
johnc
parents:
6064
diff
changeset
|
970 // Read the GC count while still holding the Heap_lock. |
1d478c993020
7143858: G1: Back to back young GCs with the second GC having a minimally sized eden
johnc
parents:
6064
diff
changeset
|
971 gc_count_before = total_collections(); |
1d478c993020
7143858: G1: Back to back young GCs with the second GC having a minimally sized eden
johnc
parents:
6064
diff
changeset
|
972 should_try_gc = true; |
1d478c993020
7143858: G1: Back to back young GCs with the second GC having a minimally sized eden
johnc
parents:
6064
diff
changeset
|
973 } |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
974 } |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
975 } |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
976 |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
977 if (should_try_gc) { |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
978 bool succeeded; |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
979 result = do_collection_pause(word_size, gc_count_before, &succeeded); |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
980 if (result != NULL) { |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
981 assert(succeeded, "only way to get back a non-NULL result"); |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
982 return result; |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
983 } |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
984 |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
985 if (succeeded) { |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
986 // If we get here we successfully scheduled a collection which |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
987 // failed to allocate. No point in trying to allocate |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
988 // further. We'll just return NULL. |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
989 MutexLockerEx x(Heap_lock); |
4910
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
990 *gc_count_before_ret = total_collections(); |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
991 return NULL; |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
992 } |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
993 } else { |
8853
2e093b564241
7014552: gc/lock/jni/jnilockXXX works too slow on 1-processor machine
mgerdin
parents:
8038
diff
changeset
|
994 if (*gclocker_retry_count_ret > GCLockerRetryAllocationCount) { |
2e093b564241
7014552: gc/lock/jni/jnilockXXX works too slow on 1-processor machine
mgerdin
parents:
8038
diff
changeset
|
995 MutexLockerEx x(Heap_lock); |
2e093b564241
7014552: gc/lock/jni/jnilockXXX works too slow on 1-processor machine
mgerdin
parents:
8038
diff
changeset
|
996 *gc_count_before_ret = total_collections(); |
2e093b564241
7014552: gc/lock/jni/jnilockXXX works too slow on 1-processor machine
mgerdin
parents:
8038
diff
changeset
|
997 return NULL; |
2e093b564241
7014552: gc/lock/jni/jnilockXXX works too slow on 1-processor machine
mgerdin
parents:
8038
diff
changeset
|
998 } |
6106
1d478c993020
7143858: G1: Back to back young GCs with the second GC having a minimally sized eden
johnc
parents:
6064
diff
changeset
|
999 // The GCLocker is either active or the GCLocker initiated |
1d478c993020
7143858: G1: Back to back young GCs with the second GC having a minimally sized eden
johnc
parents:
6064
diff
changeset
|
1000 // GC has not yet been performed. Stall until it is and |
1d478c993020
7143858: G1: Back to back young GCs with the second GC having a minimally sized eden
johnc
parents:
6064
diff
changeset
|
1001 // then retry the allocation. |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
1002 GC_locker::stall_until_clear(); |
8853
2e093b564241
7014552: gc/lock/jni/jnilockXXX works too slow on 1-processor machine
mgerdin
parents:
8038
diff
changeset
|
1003 (*gclocker_retry_count_ret) += 1; |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
1004 } |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
1005 |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
1006 // We can reach here if we were unsuccessul in scheduling a |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
1007 // collection (because another thread beat us to it) or if we were |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
1008 // stalled due to the GC locker. In either can we should retry the |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
1009 // allocation attempt in case another thread successfully |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
1010 // performed a collection and reclaimed enough space. We do the |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
1011 // first attempt (without holding the Heap_lock) here and the |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
1012 // follow-on attempt will be at the start of the next loop |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
1013 // iteration (after taking the Heap_lock). |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
1014 result = _mutator_alloc_region.attempt_allocation(word_size, |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
1015 false /* bot_updates */); |
5963
64bf7c8270cb
7147724: G1: hang in SurrogateLockerThread::manipulatePLL
johnc
parents:
4912
diff
changeset
|
1016 if (result != NULL) { |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
1017 return result; |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
1018 } |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
1019 |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
1020 // Give a warning if we seem to be looping forever. |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
1021 if ((QueuedAllocationWarningCount > 0) && |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
1022 (try_count % QueuedAllocationWarningCount == 0)) { |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
1023 warning("G1CollectedHeap::attempt_allocation_slow() " |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
1024 "retries %d times", try_count); |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
1025 } |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
1026 } |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
1027 |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
1028 ShouldNotReachHere(); |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
1029 return NULL; |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
1030 } |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
1031 |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
1032 HeapWord* G1CollectedHeap::attempt_allocation_humongous(size_t word_size, |
8853
2e093b564241
7014552: gc/lock/jni/jnilockXXX works too slow on 1-processor machine
mgerdin
parents:
8038
diff
changeset
|
1033 unsigned int * gc_count_before_ret, |
2e093b564241
7014552: gc/lock/jni/jnilockXXX works too slow on 1-processor machine
mgerdin
parents:
8038
diff
changeset
|
1034 int* gclocker_retry_count_ret) { |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
1035 // The structure of this method has a lot of similarities to |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
1036 // attempt_allocation_slow(). The reason these two were not merged |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
1037 // into a single one is that such a method would require several "if |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
1038 // allocation is not humongous do this, otherwise do that" |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
1039 // conditional paths which would obscure its flow. In fact, an early |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
1040 // version of this code did use a unified method which was harder to |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
1041 // follow and, as a result, it had subtle bugs that were hard to |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
1042 // track down. So keeping these two methods separate allows each to |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
1043 // be more readable. It will be good to keep these two in sync as |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
1044 // much as possible. |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
1045 |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
1046 assert_heap_not_locked_and_not_at_safepoint(); |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
1047 assert(isHumongous(word_size), "attempt_allocation_humongous() " |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
1048 "should only be called for humongous allocations"); |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
1049 |
4834
6a78aa6ac1ff
7132311: G1: assert((s == klass->oop_size(this)) || (Universe::heap()->is_gc_active() && ((is_typeArray()...
brutisso
parents:
4833
diff
changeset
|
1050 // Humongous objects can exhaust the heap quickly, so we should check if we |
6a78aa6ac1ff
7132311: G1: assert((s == klass->oop_size(this)) || (Universe::heap()->is_gc_active() && ((is_typeArray()...
brutisso
parents:
4833
diff
changeset
|
1051 // need to start a marking cycle at each humongous object allocation. We do |
6a78aa6ac1ff
7132311: G1: assert((s == klass->oop_size(this)) || (Universe::heap()->is_gc_active() && ((is_typeArray()...
brutisso
parents:
4833
diff
changeset
|
1052 // the check before we do the actual allocation. The reason for doing it |
6a78aa6ac1ff
7132311: G1: assert((s == klass->oop_size(this)) || (Universe::heap()->is_gc_active() && ((is_typeArray()...
brutisso
parents:
4833
diff
changeset
|
1053 // before the allocation is that we avoid having to keep track of the newly |
6a78aa6ac1ff
7132311: G1: assert((s == klass->oop_size(this)) || (Universe::heap()->is_gc_active() && ((is_typeArray()...
brutisso
parents:
4833
diff
changeset
|
1054 // allocated memory while we do a GC. |
4910
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
1055 if (g1_policy()->need_to_start_conc_mark("concurrent humongous allocation", |
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
1056 word_size)) { |
4834
6a78aa6ac1ff
7132311: G1: assert((s == klass->oop_size(this)) || (Universe::heap()->is_gc_active() && ((is_typeArray()...
brutisso
parents:
4833
diff
changeset
|
1057 collect(GCCause::_g1_humongous_allocation); |
6a78aa6ac1ff
7132311: G1: assert((s == klass->oop_size(this)) || (Universe::heap()->is_gc_active() && ((is_typeArray()...
brutisso
parents:
4833
diff
changeset
|
1058 } |
6a78aa6ac1ff
7132311: G1: assert((s == klass->oop_size(this)) || (Universe::heap()->is_gc_active() && ((is_typeArray()...
brutisso
parents:
4833
diff
changeset
|
1059 |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
1060 // We will loop until a) we manage to successfully perform the |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
1061 // allocation or b) we successfully schedule a collection which |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
1062 // fails to perform the allocation. b) is the only case when we'll |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
1063 // return NULL. |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
1064 HeapWord* result = NULL; |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
1065 for (int try_count = 1; /* we'll return */; try_count += 1) { |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
1066 bool should_try_gc; |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
1067 unsigned int gc_count_before; |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
1068 |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
1069 { |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
1070 MutexLockerEx x(Heap_lock); |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
1071 |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
1072 // Given that humongous objects are not allocated in young |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
1073 // regions, we'll first try to do the allocation without doing a |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
1074 // collection hoping that there's enough space in the heap. |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
1075 result = humongous_obj_allocate(word_size); |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
1076 if (result != NULL) { |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
1077 return result; |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
1078 } |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
1079 |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
1080 if (GC_locker::is_active_and_needs_gc()) { |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
1081 should_try_gc = false; |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
1082 } else { |
6106
1d478c993020
7143858: G1: Back to back young GCs with the second GC having a minimally sized eden
johnc
parents:
6064
diff
changeset
|
1083 // The GCLocker may not be active but the GCLocker initiated |
1d478c993020
7143858: G1: Back to back young GCs with the second GC having a minimally sized eden
johnc
parents:
6064
diff
changeset
|
1084 // GC may not yet have been performed (GCLocker::needs_gc() |
1d478c993020
7143858: G1: Back to back young GCs with the second GC having a minimally sized eden
johnc
parents:
6064
diff
changeset
|
1085 // returns true). In this case we do not try this GC and |
1d478c993020
7143858: G1: Back to back young GCs with the second GC having a minimally sized eden
johnc
parents:
6064
diff
changeset
|
1086 // wait until the GCLocker initiated GC is performed, and |
1d478c993020
7143858: G1: Back to back young GCs with the second GC having a minimally sized eden
johnc
parents:
6064
diff
changeset
|
1087 // then retry the allocation. |
1d478c993020
7143858: G1: Back to back young GCs with the second GC having a minimally sized eden
johnc
parents:
6064
diff
changeset
|
1088 if (GC_locker::needs_gc()) { |
1d478c993020
7143858: G1: Back to back young GCs with the second GC having a minimally sized eden
johnc
parents:
6064
diff
changeset
|
1089 should_try_gc = false; |
1d478c993020
7143858: G1: Back to back young GCs with the second GC having a minimally sized eden
johnc
parents:
6064
diff
changeset
|
1090 } else { |
1d478c993020
7143858: G1: Back to back young GCs with the second GC having a minimally sized eden
johnc
parents:
6064
diff
changeset
|
1091 // Read the GC count while still holding the Heap_lock. |
1d478c993020
7143858: G1: Back to back young GCs with the second GC having a minimally sized eden
johnc
parents:
6064
diff
changeset
|
1092 gc_count_before = total_collections(); |
1d478c993020
7143858: G1: Back to back young GCs with the second GC having a minimally sized eden
johnc
parents:
6064
diff
changeset
|
1093 should_try_gc = true; |
1d478c993020
7143858: G1: Back to back young GCs with the second GC having a minimally sized eden
johnc
parents:
6064
diff
changeset
|
1094 } |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
1095 } |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
1096 } |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
1097 |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
1098 if (should_try_gc) { |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
1099 // If we failed to allocate the humongous object, we should try to |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
1100 // do a collection pause (if we're allowed) in case it reclaims |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
1101 // enough space for the allocation to succeed after the pause. |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
1102 |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
1103 bool succeeded; |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
1104 result = do_collection_pause(word_size, gc_count_before, &succeeded); |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
1105 if (result != NULL) { |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
1106 assert(succeeded, "only way to get back a non-NULL result"); |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
1107 return result; |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
1108 } |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
1109 |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
1110 if (succeeded) { |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
1111 // If we get here we successfully scheduled a collection which |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
1112 // failed to allocate. No point in trying to allocate |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
1113 // further. We'll just return NULL. |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
1114 MutexLockerEx x(Heap_lock); |
4910
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
1115 *gc_count_before_ret = total_collections(); |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
1116 return NULL; |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
1117 } |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
1118 } else { |
8853
2e093b564241
7014552: gc/lock/jni/jnilockXXX works too slow on 1-processor machine
mgerdin
parents:
8038
diff
changeset
|
1119 if (*gclocker_retry_count_ret > GCLockerRetryAllocationCount) { |
2e093b564241
7014552: gc/lock/jni/jnilockXXX works too slow on 1-processor machine
mgerdin
parents:
8038
diff
changeset
|
1120 MutexLockerEx x(Heap_lock); |
2e093b564241
7014552: gc/lock/jni/jnilockXXX works too slow on 1-processor machine
mgerdin
parents:
8038
diff
changeset
|
1121 *gc_count_before_ret = total_collections(); |
2e093b564241
7014552: gc/lock/jni/jnilockXXX works too slow on 1-processor machine
mgerdin
parents:
8038
diff
changeset
|
1122 return NULL; |
2e093b564241
7014552: gc/lock/jni/jnilockXXX works too slow on 1-processor machine
mgerdin
parents:
8038
diff
changeset
|
1123 } |
6106
1d478c993020
7143858: G1: Back to back young GCs with the second GC having a minimally sized eden
johnc
parents:
6064
diff
changeset
|
1124 // The GCLocker is either active or the GCLocker initiated |
1d478c993020
7143858: G1: Back to back young GCs with the second GC having a minimally sized eden
johnc
parents:
6064
diff
changeset
|
1125 // GC has not yet been performed. Stall until it is and |
1d478c993020
7143858: G1: Back to back young GCs with the second GC having a minimally sized eden
johnc
parents:
6064
diff
changeset
|
1126 // then retry the allocation. |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
1127 GC_locker::stall_until_clear(); |
8853
2e093b564241
7014552: gc/lock/jni/jnilockXXX works too slow on 1-processor machine
mgerdin
parents:
8038
diff
changeset
|
1128 (*gclocker_retry_count_ret) += 1; |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
1129 } |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
1130 |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
1131 // We can reach here if we were unsuccessul in scheduling a |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
1132 // collection (because another thread beat us to it) or if we were |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
1133 // stalled due to the GC locker. In either can we should retry the |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
1134 // allocation attempt in case another thread successfully |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
1135 // performed a collection and reclaimed enough space. Give a |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
1136 // warning if we seem to be looping forever. |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
1137 |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
1138 if ((QueuedAllocationWarningCount > 0) && |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
1139 (try_count % QueuedAllocationWarningCount == 0)) { |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
1140 warning("G1CollectedHeap::attempt_allocation_humongous() " |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
1141 "retries %d times", try_count); |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
1142 } |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
1143 } |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
1144 |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
1145 ShouldNotReachHere(); |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
1146 return NULL; |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
1147 } |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
1148 |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
1149 HeapWord* G1CollectedHeap::attempt_allocation_at_safepoint(size_t word_size, |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
1150 bool expect_null_mutator_alloc_region) { |
2152 | 1151 assert_at_safepoint(true /* should_be_vm_thread */); |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
1152 assert(_mutator_alloc_region.get() == NULL || |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
1153 !expect_null_mutator_alloc_region, |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
1154 "the current alloc region was unexpectedly found to be non-NULL"); |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
1155 |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
1156 if (!isHumongous(word_size)) { |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
1157 return _mutator_alloc_region.attempt_allocation_locked(word_size, |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
1158 false /* bot_updates */); |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
1159 } else { |
4829
9509c20bba28
6976060: G1: humongous object allocations should initiate marking cycles when necessary
brutisso
parents:
4787
diff
changeset
|
1160 HeapWord* result = humongous_obj_allocate(word_size); |
9509c20bba28
6976060: G1: humongous object allocations should initiate marking cycles when necessary
brutisso
parents:
4787
diff
changeset
|
1161 if (result != NULL && g1_policy()->need_to_start_conc_mark("STW humongous allocation")) { |
9509c20bba28
6976060: G1: humongous object allocations should initiate marking cycles when necessary
brutisso
parents:
4787
diff
changeset
|
1162 g1_policy()->set_initiate_conc_mark_if_possible(); |
9509c20bba28
6976060: G1: humongous object allocations should initiate marking cycles when necessary
brutisso
parents:
4787
diff
changeset
|
1163 } |
9509c20bba28
6976060: G1: humongous object allocations should initiate marking cycles when necessary
brutisso
parents:
4787
diff
changeset
|
1164 return result; |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
1165 } |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
1166 |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
1167 ShouldNotReachHere(); |
342 | 1168 } |
1169 | |
1170 class PostMCRemSetClearClosure: public HeapRegionClosure { | |
6254
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
1171 G1CollectedHeap* _g1h; |
342 | 1172 ModRefBarrierSet* _mr_bs; |
1173 public: | |
6254
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
1174 PostMCRemSetClearClosure(G1CollectedHeap* g1h, ModRefBarrierSet* mr_bs) : |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
1175 _g1h(g1h), _mr_bs(mr_bs) { } |
342 | 1176 bool doHeapRegion(HeapRegion* r) { |
6254
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
1177 if (r->continuesHumongous()) { |
342 | 1178 return false; |
6254
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
1179 } |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
1180 _g1h->reset_gc_time_stamps(r); |
342 | 1181 HeapRegionRemSet* hrrs = r->rem_set(); |
1182 if (hrrs != NULL) hrrs->clear(); | |
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())); | |
1189 return false; | |
1190 } | |
1191 }; | |
1192 | |
6254
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
1193 void G1CollectedHeap::clear_rsets_post_compaction() { |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
1194 PostMCRemSetClearClosure rs_clear(this, mr_bs()); |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
1195 heap_region_iterate(&rs_clear); |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
1196 } |
342 | 1197 |
626
87fa6e083d82
6760309: G1: update remembered sets during Full GCs
apetrusenko
parents:
620
diff
changeset
|
1198 class RebuildRSOutOfRegionClosure: public HeapRegionClosure { |
87fa6e083d82
6760309: G1: update remembered sets during Full GCs
apetrusenko
parents:
620
diff
changeset
|
1199 G1CollectedHeap* _g1h; |
87fa6e083d82
6760309: G1: update remembered sets during Full GCs
apetrusenko
parents:
620
diff
changeset
|
1200 UpdateRSOopClosure _cl; |
87fa6e083d82
6760309: G1: update remembered sets during Full GCs
apetrusenko
parents:
620
diff
changeset
|
1201 int _worker_i; |
87fa6e083d82
6760309: G1: update remembered sets during Full GCs
apetrusenko
parents:
620
diff
changeset
|
1202 public: |
87fa6e083d82
6760309: G1: update remembered sets during Full GCs
apetrusenko
parents:
620
diff
changeset
|
1203 RebuildRSOutOfRegionClosure(G1CollectedHeap* g1, int worker_i = 0) : |
1861 | 1204 _cl(g1->g1_rem_set(), worker_i), |
626
87fa6e083d82
6760309: G1: update remembered sets during Full GCs
apetrusenko
parents:
620
diff
changeset
|
1205 _worker_i(worker_i), |
87fa6e083d82
6760309: G1: update remembered sets during Full GCs
apetrusenko
parents:
620
diff
changeset
|
1206 _g1h(g1) |
87fa6e083d82
6760309: G1: update remembered sets during Full GCs
apetrusenko
parents:
620
diff
changeset
|
1207 { } |
1960
878b57474103
6978187: G1: assert(ParallelGCThreads> 1 || n_yielded() == _hrrs->occupied()) strikes again
johnc
parents:
1883
diff
changeset
|
1208 |
626
87fa6e083d82
6760309: G1: update remembered sets during Full GCs
apetrusenko
parents:
620
diff
changeset
|
1209 bool doHeapRegion(HeapRegion* r) { |
87fa6e083d82
6760309: G1: update remembered sets during Full GCs
apetrusenko
parents:
620
diff
changeset
|
1210 if (!r->continuesHumongous()) { |
87fa6e083d82
6760309: G1: update remembered sets during Full GCs
apetrusenko
parents:
620
diff
changeset
|
1211 _cl.set_from(r); |
87fa6e083d82
6760309: G1: update remembered sets during Full GCs
apetrusenko
parents:
620
diff
changeset
|
1212 r->oop_iterate(&_cl); |
87fa6e083d82
6760309: G1: update remembered sets during Full GCs
apetrusenko
parents:
620
diff
changeset
|
1213 } |
87fa6e083d82
6760309: G1: update remembered sets during Full GCs
apetrusenko
parents:
620
diff
changeset
|
1214 return false; |
87fa6e083d82
6760309: G1: update remembered sets during Full GCs
apetrusenko
parents:
620
diff
changeset
|
1215 } |
87fa6e083d82
6760309: G1: update remembered sets during Full GCs
apetrusenko
parents:
620
diff
changeset
|
1216 }; |
87fa6e083d82
6760309: G1: update remembered sets during Full GCs
apetrusenko
parents:
620
diff
changeset
|
1217 |
87fa6e083d82
6760309: G1: update remembered sets during Full GCs
apetrusenko
parents:
620
diff
changeset
|
1218 class ParRebuildRSTask: public AbstractGangTask { |
87fa6e083d82
6760309: G1: update remembered sets during Full GCs
apetrusenko
parents:
620
diff
changeset
|
1219 G1CollectedHeap* _g1; |
87fa6e083d82
6760309: G1: update remembered sets during Full GCs
apetrusenko
parents:
620
diff
changeset
|
1220 public: |
87fa6e083d82
6760309: G1: update remembered sets during Full GCs
apetrusenko
parents:
620
diff
changeset
|
1221 ParRebuildRSTask(G1CollectedHeap* g1) |
87fa6e083d82
6760309: G1: update remembered sets during Full GCs
apetrusenko
parents:
620
diff
changeset
|
1222 : AbstractGangTask("ParRebuildRSTask"), |
87fa6e083d82
6760309: G1: update remembered sets during Full GCs
apetrusenko
parents:
620
diff
changeset
|
1223 _g1(g1) |
87fa6e083d82
6760309: G1: update remembered sets during Full GCs
apetrusenko
parents:
620
diff
changeset
|
1224 { } |
87fa6e083d82
6760309: G1: update remembered sets during Full GCs
apetrusenko
parents:
620
diff
changeset
|
1225 |
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
1226 void work(uint worker_id) { |
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
1227 RebuildRSOutOfRegionClosure rebuild_rs(_g1, worker_id); |
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
1228 _g1->heap_region_par_iterate_chunked(&rebuild_rs, worker_id, |
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
1229 _g1->workers()->active_workers(), |
626
87fa6e083d82
6760309: G1: update remembered sets during Full GCs
apetrusenko
parents:
620
diff
changeset
|
1230 HeapRegion::RebuildRSClaimValue); |
87fa6e083d82
6760309: G1: update remembered sets during Full GCs
apetrusenko
parents:
620
diff
changeset
|
1231 } |
87fa6e083d82
6760309: G1: update remembered sets during Full GCs
apetrusenko
parents:
620
diff
changeset
|
1232 }; |
87fa6e083d82
6760309: G1: update remembered sets during Full GCs
apetrusenko
parents:
620
diff
changeset
|
1233 |
3778
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
1234 class PostCompactionPrinterClosure: public HeapRegionClosure { |
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
1235 private: |
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
1236 G1HRPrinter* _hr_printer; |
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
1237 public: |
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
1238 bool doHeapRegion(HeapRegion* hr) { |
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
1239 assert(!hr->is_young(), "not expecting to find young regions"); |
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
1240 // We only generate output for non-empty regions. |
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
1241 if (!hr->is_empty()) { |
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
1242 if (!hr->isHumongous()) { |
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
1243 _hr_printer->post_compaction(hr, G1HRPrinter::Old); |
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
1244 } else if (hr->startsHumongous()) { |
6254
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
1245 if (hr->region_num() == 1) { |
3778
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
1246 // single humongous region |
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
1247 _hr_printer->post_compaction(hr, G1HRPrinter::SingleHumongous); |
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
1248 } else { |
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
1249 _hr_printer->post_compaction(hr, G1HRPrinter::StartsHumongous); |
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
1250 } |
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
1251 } else { |
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
1252 assert(hr->continuesHumongous(), "only way to get here"); |
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
1253 _hr_printer->post_compaction(hr, G1HRPrinter::ContinuesHumongous); |
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
1254 } |
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
1255 } |
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
1256 return false; |
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
1257 } |
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
1258 |
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
1259 PostCompactionPrinterClosure(G1HRPrinter* hr_printer) |
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
1260 : _hr_printer(hr_printer) { } |
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
1261 }; |
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
1262 |
6254
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
1263 void G1CollectedHeap::print_hrs_post_compaction() { |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
1264 PostCompactionPrinterClosure cl(hr_printer()); |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
1265 heap_region_iterate(&cl); |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
1266 } |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
1267 |
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
|
1268 double G1CollectedHeap::verify(bool guard, const char* msg) { |
bb3f6194fedb
7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code
brutisso
parents:
6611
diff
changeset
|
1269 double verify_time_ms = 0.0; |
bb3f6194fedb
7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code
brutisso
parents:
6611
diff
changeset
|
1270 |
bb3f6194fedb
7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code
brutisso
parents:
6611
diff
changeset
|
1271 if (guard && total_collections() >= VerifyGCStartAt) { |
bb3f6194fedb
7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code
brutisso
parents:
6611
diff
changeset
|
1272 double verify_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
|
1273 HandleMark hm; // Discard invalid handles created during verification |
bb3f6194fedb
7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code
brutisso
parents:
6611
diff
changeset
|
1274 gclog_or_tty->print(msg); |
bb3f6194fedb
7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code
brutisso
parents:
6611
diff
changeset
|
1275 prepare_for_verify(); |
bb3f6194fedb
7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code
brutisso
parents:
6611
diff
changeset
|
1276 Universe::verify(false /* silent */, VerifyOption_G1UsePrevMarking); |
bb3f6194fedb
7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code
brutisso
parents:
6611
diff
changeset
|
1277 verify_time_ms = (os::elapsedTime() - verify_start) * 1000; |
bb3f6194fedb
7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code
brutisso
parents:
6611
diff
changeset
|
1278 } |
bb3f6194fedb
7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code
brutisso
parents:
6611
diff
changeset
|
1279 |
bb3f6194fedb
7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code
brutisso
parents:
6611
diff
changeset
|
1280 return verify_time_ms; |
bb3f6194fedb
7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code
brutisso
parents:
6611
diff
changeset
|
1281 } |
bb3f6194fedb
7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code
brutisso
parents:
6611
diff
changeset
|
1282 |
bb3f6194fedb
7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code
brutisso
parents:
6611
diff
changeset
|
1283 void G1CollectedHeap::verify_before_gc() { |
bb3f6194fedb
7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code
brutisso
parents:
6611
diff
changeset
|
1284 double verify_time_ms = verify(VerifyBeforeGC, " VerifyBeforeGC:"); |
bb3f6194fedb
7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code
brutisso
parents:
6611
diff
changeset
|
1285 g1_policy()->phase_times()->record_verify_before_time_ms(verify_time_ms); |
bb3f6194fedb
7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code
brutisso
parents:
6611
diff
changeset
|
1286 } |
bb3f6194fedb
7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code
brutisso
parents:
6611
diff
changeset
|
1287 |
bb3f6194fedb
7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code
brutisso
parents:
6611
diff
changeset
|
1288 void G1CollectedHeap::verify_after_gc() { |
bb3f6194fedb
7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code
brutisso
parents:
6611
diff
changeset
|
1289 double verify_time_ms = verify(VerifyAfterGC, " VerifyAfterGC:"); |
bb3f6194fedb
7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code
brutisso
parents:
6611
diff
changeset
|
1290 g1_policy()->phase_times()->record_verify_after_time_ms(verify_time_ms); |
bb3f6194fedb
7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code
brutisso
parents:
6611
diff
changeset
|
1291 } |
bb3f6194fedb
7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code
brutisso
parents:
6611
diff
changeset
|
1292 |
1973 | 1293 bool G1CollectedHeap::do_collection(bool explicit_gc, |
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
1294 bool clear_all_soft_refs, |
342 | 1295 size_t word_size) { |
2152 | 1296 assert_at_safepoint(true /* should_be_vm_thread */); |
1297 | |
1359
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1313
diff
changeset
|
1298 if (GC_locker::check_active_before_gc()) { |
1973 | 1299 return false; |
1359
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1313
diff
changeset
|
1300 } |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1313
diff
changeset
|
1301 |
2125
7246a374a9f2
6458402: 3 jvmti tests fail with CMS and +ExplicitGCInvokesConcurrent
kamg
parents:
2039
diff
changeset
|
1302 SvcGCMarker sgcm(SvcGCMarker::FULL); |
342 | 1303 ResourceMark rm; |
1304 | |
4872
aa3d708d67c4
7141200: log some interesting information in ring buffers for crashes
never
parents:
4787
diff
changeset
|
1305 print_heap_before_gc(); |
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
1306 |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
1307 size_t metadata_prev_used = MetaspaceAux::used_in_bytes(); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
1308 |
4072 | 1309 HRSPhaseSetter x(HRSPhaseFullGC); |
2152 | 1310 verify_region_sets_optional(); |
342 | 1311 |
1387
0bfd3fb24150
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
jmasa
parents:
1360
diff
changeset
|
1312 const bool do_clear_all_soft_refs = clear_all_soft_refs || |
0bfd3fb24150
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
jmasa
parents:
1360
diff
changeset
|
1313 collector_policy()->should_clear_all_soft_refs(); |
0bfd3fb24150
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
jmasa
parents:
1360
diff
changeset
|
1314 |
0bfd3fb24150
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
jmasa
parents:
1360
diff
changeset
|
1315 ClearedAllSoftRefs casr(do_clear_all_soft_refs, collector_policy()); |
0bfd3fb24150
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
jmasa
parents:
1360
diff
changeset
|
1316 |
342 | 1317 { |
1318 IsGCActiveMark x; | |
1319 | |
1320 // Timing | |
6030 | 1321 assert(gc_cause() != GCCause::_java_lang_system_gc || explicit_gc, "invariant"); |
6007
5c86f8211d1e
7160728: Introduce an extra logging level for G1 logging
brutisso
parents:
5987
diff
changeset
|
1322 gclog_or_tty->date_stamp(G1Log::fine() && PrintGCDateStamps); |
5c86f8211d1e
7160728: Introduce an extra logging level for G1 logging
brutisso
parents:
5987
diff
changeset
|
1323 TraceCPUTime tcpu(G1Log::finer(), true, gclog_or_tty); |
6030 | 1324 |
6064
9d679effd28c
7166894: Add gc cause to GC logging for all collectors
brutisso
parents:
6059
diff
changeset
|
1325 TraceTime t(GCCauseString("Full GC", gc_cause()), G1Log::fine(), true, gclog_or_tty); |
3289
b52782ae3880
6946417: G1: Java VisualVM does not support G1 properly.
jmasa
parents:
3285
diff
changeset
|
1326 TraceCollectorStats tcs(g1mm()->full_collection_counters()); |
3356
78542e2b5e35
7036199: Adding a notification to the implementation of GarbageCollectorMXBeans
fparain
parents:
3323
diff
changeset
|
1327 TraceMemoryManagerStats tms(true /* fullGC */, gc_cause()); |
1089
db0d5eba9d20
6815790: G1: Missing MemoryPoolMXBeans with -XX:+UseG1GC
tonyp
parents:
1088
diff
changeset
|
1328 |
342 | 1329 double start = os::elapsedTime(); |
1330 g1_policy()->record_full_collection_start(); | |
1331 | |
4837
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
1332 // Note: When we have a more flexible GC logging framework that |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
1333 // allows us to add optional attributes to a GC log record we |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
1334 // could consider timing and reporting how long we wait in the |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
1335 // following two methods. |
2152 | 1336 wait_while_free_regions_coming(); |
4837
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
1337 // If we start the compaction before the CM threads finish |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
1338 // scanning the root regions we might trip them over as we'll |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
1339 // be moving objects / updating references. So let's wait until |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
1340 // they are done. By telling them to abort, they should complete |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
1341 // early. |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
1342 _cm->root_regions()->abort(); |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
1343 _cm->root_regions()->wait_until_scan_finished(); |
2361 | 1344 append_secondary_free_list_if_not_empty_with_lock(); |
2152 | 1345 |
342 | 1346 gc_prologue(true); |
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
1347 increment_total_collections(true /* full gc */); |
6120
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
1348 increment_old_marking_cycles_started(); |
342 | 1349 |
1350 size_t g1h_prev_used = used(); | |
1351 assert(used() == recalculate_used(), "Should be equal"); | |
1352 | |
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
|
1353 verify_before_gc(); |
bb3f6194fedb
7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code
brutisso
parents:
6611
diff
changeset
|
1354 |
3869
7f776886a215
6810861: G1: support -XX:+{PrintClassHistogram,HeapDump}{Before,After}FullGC
ysr
parents:
3867
diff
changeset
|
1355 pre_full_gc_dump(); |
342 | 1356 |
1357 COMPILER2_PRESENT(DerivedPointerTable::clear()); | |
1358 | |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
1359 // Disable discovery and empty the discovered lists |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
1360 // for the CM ref processor. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
1361 ref_processor_cm()->disable_discovery(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
1362 ref_processor_cm()->abandon_partial_discovery(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
1363 ref_processor_cm()->verify_no_references_recorded(); |
342 | 1364 |
1365 // Abandon current iterations of concurrent marking and concurrent | |
4837
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
1366 // refinement, if any are in progress. We have to do this before |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
1367 // wait_until_scan_finished() below. |
342 | 1368 concurrent_mark()->abort(); |
1369 | |
1370 // Make sure we'll choose a new allocation region afterwards. | |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
1371 release_mutator_alloc_region(); |
636 | 1372 abandon_gc_alloc_regions(); |
1861 | 1373 g1_rem_set()->cleanupHRRS(); |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
1374 |
3778
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
1375 // We should call this after we retire any currently active alloc |
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
1376 // regions so that all the ALLOC / RETIRE events are generated |
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
1377 // before the start GC event. |
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
1378 _hr_printer.start_gc(true /* full */, (size_t) total_collections()); |
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
1379 |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
1380 // We may have added regions to the current incremental collection |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
1381 // set between the last GC or pause and now. We need to clear the |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
1382 // incremental collection set and then start rebuilding it afresh |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
1383 // after this full GC. |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
1384 abandon_collection_set(g1_policy()->inc_cset_head()); |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
1385 g1_policy()->clear_incremental_cset(); |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
1386 g1_policy()->stop_incremental_cset_building(); |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
1387 |
4072 | 1388 tear_down_region_sets(false /* free_list_only */); |
4710 | 1389 g1_policy()->set_gcs_are_young(true); |
342 | 1390 |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
1391 // See the comments in g1CollectedHeap.hpp and |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
1392 // G1CollectedHeap::ref_processing_init() about |
1974
fd1d227ef1b9
6983204: G1: Nightly test nsk/regression/b4958615 failing with +ExplicitGCInvokesConcurrent
johnc
parents:
1973
diff
changeset
|
1393 // how reference processing currently works in G1. |
fd1d227ef1b9
6983204: G1: Nightly test nsk/regression/b4958615 failing with +ExplicitGCInvokesConcurrent
johnc
parents:
1973
diff
changeset
|
1394 |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
1395 // Temporarily make discovery by the STW ref processor single threaded (non-MT). |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
1396 ReferenceProcessorMTDiscoveryMutator stw_rp_disc_ser(ref_processor_stw(), false); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
1397 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
1398 // Temporarily clear the STW ref processor's _is_alive_non_header field. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
1399 ReferenceProcessorIsAliveMutator stw_rp_is_alive_null(ref_processor_stw(), NULL); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
1400 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
1401 ref_processor_stw()->enable_discovery(true /*verify_disabled*/, true /*verify_no_refs*/); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
1402 ref_processor_stw()->setup_policy(do_clear_all_soft_refs); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
1403 |
342 | 1404 // Do collection work |
1405 { | |
1406 HandleMark hm; // Discard invalid handles created during gc | |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
1407 G1MarkSweep::invoke_at_safepoint(ref_processor_stw(), do_clear_all_soft_refs); |
342 | 1408 } |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
1409 |
2152 | 1410 assert(free_regions() == 0, "we should not have added any free regions"); |
4072 | 1411 rebuild_region_sets(false /* free_list_only */); |
342 | 1412 |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
1413 // Enqueue any discovered reference objects that have |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
1414 // not been removed from the discovered lists. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
1415 ref_processor_stw()->enqueue_discovered_references(); |
342 | 1416 |
1417 COMPILER2_PRESENT(DerivedPointerTable::update_pointers()); | |
1418 | |
1089
db0d5eba9d20
6815790: G1: Missing MemoryPoolMXBeans with -XX:+UseG1GC
tonyp
parents:
1088
diff
changeset
|
1419 MemoryService::track_memory_usage(); |
db0d5eba9d20
6815790: G1: Missing MemoryPoolMXBeans with -XX:+UseG1GC
tonyp
parents:
1088
diff
changeset
|
1420 |
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
|
1421 verify_after_gc(); |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
1422 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
1423 assert(!ref_processor_stw()->discovery_enabled(), "Postcondition"); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
1424 ref_processor_stw()->verify_no_references_recorded(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
1425 |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
1426 // Delete metaspaces for unloaded class loaders and clean up loader_data graph |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
1427 ClassLoaderDataGraph::purge(); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
1428 |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
1429 // Note: since we've just done a full GC, concurrent |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
1430 // marking is no longer active. Therefore we need not |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
1431 // re-enable reference discovery for the CM ref processor. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
1432 // That will be done at the start of the next marking cycle. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
1433 assert(!ref_processor_cm()->discovery_enabled(), "Postcondition"); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
1434 ref_processor_cm()->verify_no_references_recorded(); |
342 | 1435 |
1436 reset_gc_time_stamp(); | |
1437 // Since everything potentially moved, we will clear all remembered | |
626
87fa6e083d82
6760309: G1: update remembered sets during Full GCs
apetrusenko
parents:
620
diff
changeset
|
1438 // sets, and clear all cards. Later we will rebuild remebered |
87fa6e083d82
6760309: G1: update remembered sets during Full GCs
apetrusenko
parents:
620
diff
changeset
|
1439 // sets. We will also reset the GC time stamps of the regions. |
6254
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
1440 clear_rsets_post_compaction(); |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
1441 check_gc_time_stamps(); |
342 | 1442 |
1443 // Resize the heap if necessary. | |
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
1444 resize_if_necessary_after_full_collection(explicit_gc ? 0 : word_size); |
342 | 1445 |
3778
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
1446 if (_hr_printer.is_active()) { |
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
1447 // We should do this after we potentially resize the heap so |
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
1448 // that all the COMMIT / UNCOMMIT events are generated before |
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
1449 // the end GC event. |
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
1450 |
6254
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
1451 print_hrs_post_compaction(); |
3778
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
1452 _hr_printer.end_gc(true /* full */, (size_t) total_collections()); |
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
1453 } |
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
1454 |
342 | 1455 if (_cg1r->use_cache()) { |
1456 _cg1r->clear_and_record_card_counts(); | |
1457 _cg1r->clear_hot_cache(); | |
1458 } | |
1459 | |
626
87fa6e083d82
6760309: G1: update remembered sets during Full GCs
apetrusenko
parents:
620
diff
changeset
|
1460 // Rebuild remembered sets of all regions. |
1833
8b10f48633dc
6984287: Regularize how GC parallel workers are specified.
jmasa
parents:
1755
diff
changeset
|
1461 if (G1CollectedHeap::use_parallel_gc_threads()) { |
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
1462 uint n_workers = |
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
1463 AdaptiveSizePolicy::calc_active_workers(workers()->total_workers(), |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
1464 workers()->active_workers(), |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
1465 Threads::number_of_non_daemon_threads()); |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
1466 assert(UseDynamicNumberOfGCThreads || |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
1467 n_workers == workers()->total_workers(), |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
1468 "If not dynamic should be using all the workers"); |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
1469 workers()->set_active_workers(n_workers); |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
1470 // Set parallel threads in the heap (_n_par_threads) only |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
1471 // before a parallel phase and always reset it to 0 after |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
1472 // the phase so that the number of parallel threads does |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
1473 // no get carried forward to a serial phase where there |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
1474 // may be code that is "possibly_parallel". |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
1475 set_par_threads(n_workers); |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
1476 |
626
87fa6e083d82
6760309: G1: update remembered sets during Full GCs
apetrusenko
parents:
620
diff
changeset
|
1477 ParRebuildRSTask rebuild_rs_task(this); |
87fa6e083d82
6760309: G1: update remembered sets during Full GCs
apetrusenko
parents:
620
diff
changeset
|
1478 assert(check_heap_region_claim_values( |
87fa6e083d82
6760309: G1: update remembered sets during Full GCs
apetrusenko
parents:
620
diff
changeset
|
1479 HeapRegion::InitialClaimValue), "sanity check"); |
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
1480 assert(UseDynamicNumberOfGCThreads || |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
1481 workers()->active_workers() == workers()->total_workers(), |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
1482 "Unless dynamic should use total workers"); |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
1483 // Use the most recent number of active workers |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
1484 assert(workers()->active_workers() > 0, |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
1485 "Active workers not properly set"); |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
1486 set_par_threads(workers()->active_workers()); |
626
87fa6e083d82
6760309: G1: update remembered sets during Full GCs
apetrusenko
parents:
620
diff
changeset
|
1487 workers()->run_task(&rebuild_rs_task); |
87fa6e083d82
6760309: G1: update remembered sets during Full GCs
apetrusenko
parents:
620
diff
changeset
|
1488 set_par_threads(0); |
87fa6e083d82
6760309: G1: update remembered sets during Full GCs
apetrusenko
parents:
620
diff
changeset
|
1489 assert(check_heap_region_claim_values( |
87fa6e083d82
6760309: G1: update remembered sets during Full GCs
apetrusenko
parents:
620
diff
changeset
|
1490 HeapRegion::RebuildRSClaimValue), "sanity check"); |
87fa6e083d82
6760309: G1: update remembered sets during Full GCs
apetrusenko
parents:
620
diff
changeset
|
1491 reset_heap_region_claim_values(); |
87fa6e083d82
6760309: G1: update remembered sets during Full GCs
apetrusenko
parents:
620
diff
changeset
|
1492 } else { |
87fa6e083d82
6760309: G1: update remembered sets during Full GCs
apetrusenko
parents:
620
diff
changeset
|
1493 RebuildRSOutOfRegionClosure rebuild_rs(this); |
87fa6e083d82
6760309: G1: update remembered sets during Full GCs
apetrusenko
parents:
620
diff
changeset
|
1494 heap_region_iterate(&rebuild_rs); |
87fa6e083d82
6760309: G1: update remembered sets during Full GCs
apetrusenko
parents:
620
diff
changeset
|
1495 } |
87fa6e083d82
6760309: G1: update remembered sets during Full GCs
apetrusenko
parents:
620
diff
changeset
|
1496 |
6007
5c86f8211d1e
7160728: Introduce an extra logging level for G1 logging
brutisso
parents:
5987
diff
changeset
|
1497 if (G1Log::fine()) { |
342 | 1498 print_size_transition(gclog_or_tty, g1h_prev_used, used(), capacity()); |
1499 } | |
1500 | |
1501 if (true) { // FIXME | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
1502 MetaspaceGC::compute_new_size(); |
342 | 1503 } |
1504 | |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
1505 // Start a new incremental collection set for the next pause |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
1506 assert(g1_policy()->collection_set() == NULL, "must be"); |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
1507 g1_policy()->start_incremental_cset_building(); |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
1508 |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
1509 // Clear the _cset_fast_test bitmap in anticipation of adding |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
1510 // regions to the incremental collection set for the next |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
1511 // evacuation pause. |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
1512 clear_cset_fast_test(); |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
1513 |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
1514 init_mutator_alloc_region(); |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
1515 |
342 | 1516 double end = os::elapsedTime(); |
1517 g1_policy()->record_full_collection_end(); | |
1518 | |
546
05c6d52fa7a9
6690928: Use spinning in combination with yields for workstealing termination.
jmasa
parents:
545
diff
changeset
|
1519 #ifdef TRACESPINNING |
05c6d52fa7a9
6690928: Use spinning in combination with yields for workstealing termination.
jmasa
parents:
545
diff
changeset
|
1520 ParallelTaskTerminator::print_termination_counts(); |
05c6d52fa7a9
6690928: Use spinning in combination with yields for workstealing termination.
jmasa
parents:
545
diff
changeset
|
1521 #endif |
05c6d52fa7a9
6690928: Use spinning in combination with yields for workstealing termination.
jmasa
parents:
545
diff
changeset
|
1522 |
342 | 1523 gc_epilogue(true); |
1524 | |
794 | 1525 // Discard all rset updates |
1526 JavaThread::dirty_card_queue_set().abandon_logs(); | |
616
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
1527 assert(!G1DeferredRSUpdate |
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
1528 || (G1DeferredRSUpdate && (dirty_card_queue_set().completed_buffers_num() == 0)), "Should not be any"); |
6121
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
1529 |
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
1530 _young_list->reset_sampled_info(); |
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
1531 // At this point there should be no regions in the |
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
1532 // entire heap tagged as young. |
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
1533 assert( check_young_list_empty(true /* check_heap */), |
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
1534 "young list should be empty at this point"); |
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
1535 |
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
1536 // Update the number of full collections that have been completed. |
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
1537 increment_old_marking_cycles_completed(false /* concurrent */); |
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
1538 |
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
1539 _hrs.verify_optional(); |
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
1540 verify_region_sets_optional(); |
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
1541 |
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
1542 print_heap_after_gc(); |
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
1543 |
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
1544 // 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
|
1545 // 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
|
1546 // 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
|
1547 // before any GC notifications are raised. |
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
1548 g1mm()->update_sizes(); |
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
1549 } |
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
1550 |
3869
7f776886a215
6810861: G1: support -XX:+{PrintClassHistogram,HeapDump}{Before,After}FullGC
ysr
parents:
3867
diff
changeset
|
1551 post_full_gc_dump(); |
1973 | 1552 |
1553 return true; | |
342 | 1554 } |
1555 | |
1556 void G1CollectedHeap::do_full_collection(bool clear_all_soft_refs) { | |
1973 | 1557 // do_collection() will return whether it succeeded in performing |
1558 // the GC. Currently, there is no facility on the | |
1559 // do_full_collection() API to notify the caller than the collection | |
1560 // did not succeed (e.g., because it was locked out by the GC | |
1561 // locker). So, right now, we'll ignore the return value. | |
1562 bool dummy = do_collection(true, /* explicit_gc */ | |
1563 clear_all_soft_refs, | |
1564 0 /* word_size */); | |
342 | 1565 } |
1566 | |
1567 // This code is mostly copied from TenuredGeneration. | |
1568 void | |
1569 G1CollectedHeap:: | |
1570 resize_if_necessary_after_full_collection(size_t word_size) { | |
1571 assert(MinHeapFreeRatio <= MaxHeapFreeRatio, "sanity check"); | |
1572 | |
1573 // Include the current allocation, if any, and bytes that will be | |
1574 // pre-allocated to support collections, as "used". | |
1575 const size_t used_after_gc = used(); | |
1576 const size_t capacity_after_gc = capacity(); | |
1577 const size_t free_after_gc = capacity_after_gc - used_after_gc; | |
1578 | |
1717
688c3755d7af
6959014: G1: assert(minimum_desired_capacity <= maximum_desired_capacity) failed: sanity check
tonyp
parents:
1709
diff
changeset
|
1579 // This is enforced in arguments.cpp. |
688c3755d7af
6959014: G1: assert(minimum_desired_capacity <= maximum_desired_capacity) failed: sanity check
tonyp
parents:
1709
diff
changeset
|
1580 assert(MinHeapFreeRatio <= MaxHeapFreeRatio, |
688c3755d7af
6959014: G1: assert(minimum_desired_capacity <= maximum_desired_capacity) failed: sanity check
tonyp
parents:
1709
diff
changeset
|
1581 "otherwise the code below doesn't make sense"); |
688c3755d7af
6959014: G1: assert(minimum_desired_capacity <= maximum_desired_capacity) failed: sanity check
tonyp
parents:
1709
diff
changeset
|
1582 |
342 | 1583 // We don't have floating point command-line arguments |
1717
688c3755d7af
6959014: G1: assert(minimum_desired_capacity <= maximum_desired_capacity) failed: sanity check
tonyp
parents:
1709
diff
changeset
|
1584 const double minimum_free_percentage = (double) MinHeapFreeRatio / 100.0; |
342 | 1585 const double maximum_used_percentage = 1.0 - minimum_free_percentage; |
1717
688c3755d7af
6959014: G1: assert(minimum_desired_capacity <= maximum_desired_capacity) failed: sanity check
tonyp
parents:
1709
diff
changeset
|
1586 const double maximum_free_percentage = (double) MaxHeapFreeRatio / 100.0; |
342 | 1587 const double minimum_used_percentage = 1.0 - maximum_free_percentage; |
1588 | |
1717
688c3755d7af
6959014: G1: assert(minimum_desired_capacity <= maximum_desired_capacity) failed: sanity check
tonyp
parents:
1709
diff
changeset
|
1589 const size_t min_heap_size = collector_policy()->min_heap_byte_size(); |
688c3755d7af
6959014: G1: assert(minimum_desired_capacity <= maximum_desired_capacity) failed: sanity check
tonyp
parents:
1709
diff
changeset
|
1590 const size_t max_heap_size = collector_policy()->max_heap_byte_size(); |
688c3755d7af
6959014: G1: assert(minimum_desired_capacity <= maximum_desired_capacity) failed: sanity check
tonyp
parents:
1709
diff
changeset
|
1591 |
688c3755d7af
6959014: G1: assert(minimum_desired_capacity <= maximum_desired_capacity) failed: sanity check
tonyp
parents:
1709
diff
changeset
|
1592 // We have to be careful here as these two calculations can overflow |
688c3755d7af
6959014: G1: assert(minimum_desired_capacity <= maximum_desired_capacity) failed: sanity check
tonyp
parents:
1709
diff
changeset
|
1593 // 32-bit size_t's. |
688c3755d7af
6959014: G1: assert(minimum_desired_capacity <= maximum_desired_capacity) failed: sanity check
tonyp
parents:
1709
diff
changeset
|
1594 double used_after_gc_d = (double) used_after_gc; |
688c3755d7af
6959014: G1: assert(minimum_desired_capacity <= maximum_desired_capacity) failed: sanity check
tonyp
parents:
1709
diff
changeset
|
1595 double minimum_desired_capacity_d = used_after_gc_d / maximum_used_percentage; |
688c3755d7af
6959014: G1: assert(minimum_desired_capacity <= maximum_desired_capacity) failed: sanity check
tonyp
parents:
1709
diff
changeset
|
1596 double maximum_desired_capacity_d = used_after_gc_d / minimum_used_percentage; |
688c3755d7af
6959014: G1: assert(minimum_desired_capacity <= maximum_desired_capacity) failed: sanity check
tonyp
parents:
1709
diff
changeset
|
1597 |
688c3755d7af
6959014: G1: assert(minimum_desired_capacity <= maximum_desired_capacity) failed: sanity check
tonyp
parents:
1709
diff
changeset
|
1598 // Let's make sure that they are both under the max heap size, which |
688c3755d7af
6959014: G1: assert(minimum_desired_capacity <= maximum_desired_capacity) failed: sanity check
tonyp
parents:
1709
diff
changeset
|
1599 // by default will make them fit into a size_t. |
688c3755d7af
6959014: G1: assert(minimum_desired_capacity <= maximum_desired_capacity) failed: sanity check
tonyp
parents:
1709
diff
changeset
|
1600 double desired_capacity_upper_bound = (double) max_heap_size; |
688c3755d7af
6959014: G1: assert(minimum_desired_capacity <= maximum_desired_capacity) failed: sanity check
tonyp
parents:
1709
diff
changeset
|
1601 minimum_desired_capacity_d = MIN2(minimum_desired_capacity_d, |
688c3755d7af
6959014: G1: assert(minimum_desired_capacity <= maximum_desired_capacity) failed: sanity check
tonyp
parents:
1709
diff
changeset
|
1602 desired_capacity_upper_bound); |
688c3755d7af
6959014: G1: assert(minimum_desired_capacity <= maximum_desired_capacity) failed: sanity check
tonyp
parents:
1709
diff
changeset
|
1603 maximum_desired_capacity_d = MIN2(maximum_desired_capacity_d, |
688c3755d7af
6959014: G1: assert(minimum_desired_capacity <= maximum_desired_capacity) failed: sanity check
tonyp
parents:
1709
diff
changeset
|
1604 desired_capacity_upper_bound); |
688c3755d7af
6959014: G1: assert(minimum_desired_capacity <= maximum_desired_capacity) failed: sanity check
tonyp
parents:
1709
diff
changeset
|
1605 |
688c3755d7af
6959014: G1: assert(minimum_desired_capacity <= maximum_desired_capacity) failed: sanity check
tonyp
parents:
1709
diff
changeset
|
1606 // We can now safely turn them into size_t's. |
688c3755d7af
6959014: G1: assert(minimum_desired_capacity <= maximum_desired_capacity) failed: sanity check
tonyp
parents:
1709
diff
changeset
|
1607 size_t minimum_desired_capacity = (size_t) minimum_desired_capacity_d; |
688c3755d7af
6959014: G1: assert(minimum_desired_capacity <= maximum_desired_capacity) failed: sanity check
tonyp
parents:
1709
diff
changeset
|
1608 size_t maximum_desired_capacity = (size_t) maximum_desired_capacity_d; |
688c3755d7af
6959014: G1: assert(minimum_desired_capacity <= maximum_desired_capacity) failed: sanity check
tonyp
parents:
1709
diff
changeset
|
1609 |
688c3755d7af
6959014: G1: assert(minimum_desired_capacity <= maximum_desired_capacity) failed: sanity check
tonyp
parents:
1709
diff
changeset
|
1610 // This assert only makes sense here, before we adjust them |
688c3755d7af
6959014: G1: assert(minimum_desired_capacity <= maximum_desired_capacity) failed: sanity check
tonyp
parents:
1709
diff
changeset
|
1611 // with respect to the min and max heap size. |
688c3755d7af
6959014: G1: assert(minimum_desired_capacity <= maximum_desired_capacity) failed: sanity check
tonyp
parents:
1709
diff
changeset
|
1612 assert(minimum_desired_capacity <= maximum_desired_capacity, |
688c3755d7af
6959014: G1: assert(minimum_desired_capacity <= maximum_desired_capacity) failed: sanity check
tonyp
parents:
1709
diff
changeset
|
1613 err_msg("minimum_desired_capacity = "SIZE_FORMAT", " |
688c3755d7af
6959014: G1: assert(minimum_desired_capacity <= maximum_desired_capacity) failed: sanity check
tonyp
parents:
1709
diff
changeset
|
1614 "maximum_desired_capacity = "SIZE_FORMAT, |
688c3755d7af
6959014: G1: assert(minimum_desired_capacity <= maximum_desired_capacity) failed: sanity check
tonyp
parents:
1709
diff
changeset
|
1615 minimum_desired_capacity, maximum_desired_capacity)); |
688c3755d7af
6959014: G1: assert(minimum_desired_capacity <= maximum_desired_capacity) failed: sanity check
tonyp
parents:
1709
diff
changeset
|
1616 |
688c3755d7af
6959014: G1: assert(minimum_desired_capacity <= maximum_desired_capacity) failed: sanity check
tonyp
parents:
1709
diff
changeset
|
1617 // Should not be greater than the heap max size. No need to adjust |
688c3755d7af
6959014: G1: assert(minimum_desired_capacity <= maximum_desired_capacity) failed: sanity check
tonyp
parents:
1709
diff
changeset
|
1618 // it with respect to the heap min size as it's a lower bound (i.e., |
688c3755d7af
6959014: G1: assert(minimum_desired_capacity <= maximum_desired_capacity) failed: sanity check
tonyp
parents:
1709
diff
changeset
|
1619 // we'll try to make the capacity larger than it, not smaller). |
688c3755d7af
6959014: G1: assert(minimum_desired_capacity <= maximum_desired_capacity) failed: sanity check
tonyp
parents:
1709
diff
changeset
|
1620 minimum_desired_capacity = MIN2(minimum_desired_capacity, max_heap_size); |
688c3755d7af
6959014: G1: assert(minimum_desired_capacity <= maximum_desired_capacity) failed: sanity check
tonyp
parents:
1709
diff
changeset
|
1621 // Should not be less than the heap min size. No need to adjust it |
688c3755d7af
6959014: G1: assert(minimum_desired_capacity <= maximum_desired_capacity) failed: sanity check
tonyp
parents:
1709
diff
changeset
|
1622 // with respect to the heap max size as it's an upper bound (i.e., |
688c3755d7af
6959014: G1: assert(minimum_desired_capacity <= maximum_desired_capacity) failed: sanity check
tonyp
parents:
1709
diff
changeset
|
1623 // we'll try to make the capacity smaller than it, not greater). |
688c3755d7af
6959014: G1: assert(minimum_desired_capacity <= maximum_desired_capacity) failed: sanity check
tonyp
parents:
1709
diff
changeset
|
1624 maximum_desired_capacity = MAX2(maximum_desired_capacity, min_heap_size); |
342 | 1625 |
1717
688c3755d7af
6959014: G1: assert(minimum_desired_capacity <= maximum_desired_capacity) failed: sanity check
tonyp
parents:
1709
diff
changeset
|
1626 if (capacity_after_gc < minimum_desired_capacity) { |
342 | 1627 // Don't expand unless it's significant |
1628 size_t expand_bytes = minimum_desired_capacity - capacity_after_gc; | |
3914
20213c8a3c40
7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents:
3886
diff
changeset
|
1629 ergo_verbose4(ErgoHeapSizing, |
20213c8a3c40
7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents:
3886
diff
changeset
|
1630 "attempt heap expansion", |
20213c8a3c40
7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents:
3886
diff
changeset
|
1631 ergo_format_reason("capacity lower than " |
20213c8a3c40
7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents:
3886
diff
changeset
|
1632 "min desired capacity after Full GC") |
20213c8a3c40
7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents:
3886
diff
changeset
|
1633 ergo_format_byte("capacity") |
20213c8a3c40
7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents:
3886
diff
changeset
|
1634 ergo_format_byte("occupancy") |
20213c8a3c40
7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents:
3886
diff
changeset
|
1635 ergo_format_byte_perc("min desired capacity"), |
20213c8a3c40
7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents:
3886
diff
changeset
|
1636 capacity_after_gc, used_after_gc, |
20213c8a3c40
7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents:
3886
diff
changeset
|
1637 minimum_desired_capacity, (double) MinHeapFreeRatio); |
20213c8a3c40
7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents:
3886
diff
changeset
|
1638 expand(expand_bytes); |
342 | 1639 |
1640 // No expansion, now see if we want to shrink | |
1717
688c3755d7af
6959014: G1: assert(minimum_desired_capacity <= maximum_desired_capacity) failed: sanity check
tonyp
parents:
1709
diff
changeset
|
1641 } else if (capacity_after_gc > maximum_desired_capacity) { |
342 | 1642 // Capacity too large, compute shrinking size |
1643 size_t shrink_bytes = capacity_after_gc - maximum_desired_capacity; | |
3914
20213c8a3c40
7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents:
3886
diff
changeset
|
1644 ergo_verbose4(ErgoHeapSizing, |
20213c8a3c40
7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents:
3886
diff
changeset
|
1645 "attempt heap shrinking", |
20213c8a3c40
7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents:
3886
diff
changeset
|
1646 ergo_format_reason("capacity higher than " |
20213c8a3c40
7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents:
3886
diff
changeset
|
1647 "max desired capacity after Full GC") |
20213c8a3c40
7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents:
3886
diff
changeset
|
1648 ergo_format_byte("capacity") |
20213c8a3c40
7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents:
3886
diff
changeset
|
1649 ergo_format_byte("occupancy") |
20213c8a3c40
7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents:
3886
diff
changeset
|
1650 ergo_format_byte_perc("max desired capacity"), |
20213c8a3c40
7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents:
3886
diff
changeset
|
1651 capacity_after_gc, used_after_gc, |
20213c8a3c40
7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents:
3886
diff
changeset
|
1652 maximum_desired_capacity, (double) MaxHeapFreeRatio); |
342 | 1653 shrink(shrink_bytes); |
1654 } | |
1655 } | |
1656 | |
1657 | |
1658 HeapWord* | |
1973 | 1659 G1CollectedHeap::satisfy_failed_allocation(size_t word_size, |
1660 bool* succeeded) { | |
2152 | 1661 assert_at_safepoint(true /* should_be_vm_thread */); |
1973 | 1662 |
1663 *succeeded = true; | |
1664 // Let's attempt the allocation first. | |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
1665 HeapWord* result = |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
1666 attempt_allocation_at_safepoint(word_size, |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
1667 false /* expect_null_mutator_alloc_region */); |
1973 | 1668 if (result != NULL) { |
1669 assert(*succeeded, "sanity"); | |
1670 return result; | |
1671 } | |
342 | 1672 |
1673 // In a G1 heap, we're supposed to keep allocation from failing by | |
1674 // incremental pauses. Therefore, at least for now, we'll favor | |
1675 // expansion over collection. (This might change in the future if we can | |
1676 // do something smarter than full collection to satisfy a failed alloc.) | |
1677 result = expand_and_allocate(word_size); | |
1678 if (result != NULL) { | |
1973 | 1679 assert(*succeeded, "sanity"); |
342 | 1680 return result; |
1681 } | |
1682 | |
1973 | 1683 // Expansion didn't work, we'll try to do a Full GC. |
1684 bool gc_succeeded = do_collection(false, /* explicit_gc */ | |
1685 false, /* clear_all_soft_refs */ | |
1686 word_size); | |
1687 if (!gc_succeeded) { | |
1688 *succeeded = false; | |
1689 return NULL; | |
1690 } | |
1691 | |
1692 // Retry the allocation | |
1693 result = attempt_allocation_at_safepoint(word_size, | |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
1694 true /* expect_null_mutator_alloc_region */); |
342 | 1695 if (result != NULL) { |
1973 | 1696 assert(*succeeded, "sanity"); |
342 | 1697 return result; |
1698 } | |
1699 | |
1973 | 1700 // Then, try a Full GC that will collect all soft references. |
1701 gc_succeeded = do_collection(false, /* explicit_gc */ | |
1702 true, /* clear_all_soft_refs */ | |
1703 word_size); | |
1704 if (!gc_succeeded) { | |
1705 *succeeded = false; | |
1706 return NULL; | |
1707 } | |
1708 | |
1709 // Retry the allocation once more | |
1710 result = attempt_allocation_at_safepoint(word_size, | |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
1711 true /* expect_null_mutator_alloc_region */); |
342 | 1712 if (result != NULL) { |
1973 | 1713 assert(*succeeded, "sanity"); |
342 | 1714 return result; |
1715 } | |
1716 | |
1387
0bfd3fb24150
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
jmasa
parents:
1360
diff
changeset
|
1717 assert(!collector_policy()->should_clear_all_soft_refs(), |
1973 | 1718 "Flag should have been handled and cleared prior to this point"); |
1387
0bfd3fb24150
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
jmasa
parents:
1360
diff
changeset
|
1719 |
342 | 1720 // What else? We might try synchronous finalization later. If the total |
1721 // space available is large enough for the allocation, then a more | |
1722 // complete compaction phase than we've tried so far might be | |
1723 // appropriate. | |
1973 | 1724 assert(*succeeded, "sanity"); |
342 | 1725 return NULL; |
1726 } | |
1727 | |
1728 // Attempting to expand the heap sufficiently | |
1729 // to support an allocation of the given "word_size". If | |
1730 // successful, perform the allocation and return the address of the | |
1731 // allocated block, or else "NULL". | |
1732 | |
1733 HeapWord* G1CollectedHeap::expand_and_allocate(size_t word_size) { | |
2152 | 1734 assert_at_safepoint(true /* should_be_vm_thread */); |
1735 | |
1736 verify_region_sets_optional(); | |
1973 | 1737 |
2188
c33825b68624
6923430: G1: assert(res != 0,"This should have worked.")
johnc
parents:
2173
diff
changeset
|
1738 size_t expand_bytes = MAX2(word_size * HeapWordSize, MinHeapDeltaBytes); |
3914
20213c8a3c40
7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents:
3886
diff
changeset
|
1739 ergo_verbose1(ErgoHeapSizing, |
20213c8a3c40
7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents:
3886
diff
changeset
|
1740 "attempt heap expansion", |
20213c8a3c40
7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents:
3886
diff
changeset
|
1741 ergo_format_reason("allocation request failed") |
20213c8a3c40
7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents:
3886
diff
changeset
|
1742 ergo_format_byte("allocation request"), |
20213c8a3c40
7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents:
3886
diff
changeset
|
1743 word_size * HeapWordSize); |
2188
c33825b68624
6923430: G1: assert(res != 0,"This should have worked.")
johnc
parents:
2173
diff
changeset
|
1744 if (expand(expand_bytes)) { |
3766 | 1745 _hrs.verify_optional(); |
2188
c33825b68624
6923430: G1: assert(res != 0,"This should have worked.")
johnc
parents:
2173
diff
changeset
|
1746 verify_region_sets_optional(); |
c33825b68624
6923430: G1: assert(res != 0,"This should have worked.")
johnc
parents:
2173
diff
changeset
|
1747 return attempt_allocation_at_safepoint(word_size, |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
1748 false /* expect_null_mutator_alloc_region */); |
2188
c33825b68624
6923430: G1: assert(res != 0,"This should have worked.")
johnc
parents:
2173
diff
changeset
|
1749 } |
c33825b68624
6923430: G1: assert(res != 0,"This should have worked.")
johnc
parents:
2173
diff
changeset
|
1750 return NULL; |
342 | 1751 } |
1752 | |
3766 | 1753 void G1CollectedHeap::update_committed_space(HeapWord* old_end, |
1754 HeapWord* new_end) { | |
1755 assert(old_end != new_end, "don't call this otherwise"); | |
1756 assert((HeapWord*) _g1_storage.high() == new_end, "invariant"); | |
1757 | |
1758 // Update the committed mem region. | |
1759 _g1_committed.set_end(new_end); | |
1760 // Tell the card table about the update. | |
1761 Universe::heap()->barrier_set()->resize_covered_region(_g1_committed); | |
1762 // Tell the BOT about the update. | |
1763 _bot_shared->resize(_g1_committed.word_size()); | |
1764 } | |
1765 | |
2188
c33825b68624
6923430: G1: assert(res != 0,"This should have worked.")
johnc
parents:
2173
diff
changeset
|
1766 bool G1CollectedHeap::expand(size_t expand_bytes) { |
342 | 1767 size_t old_mem_size = _g1_storage.committed_size(); |
2188
c33825b68624
6923430: G1: assert(res != 0,"This should have worked.")
johnc
parents:
2173
diff
changeset
|
1768 size_t aligned_expand_bytes = ReservedSpace::page_align_size_up(expand_bytes); |
342 | 1769 aligned_expand_bytes = align_size_up(aligned_expand_bytes, |
1770 HeapRegion::GrainBytes); | |
3914
20213c8a3c40
7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents:
3886
diff
changeset
|
1771 ergo_verbose2(ErgoHeapSizing, |
20213c8a3c40
7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents:
3886
diff
changeset
|
1772 "expand the heap", |
20213c8a3c40
7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents:
3886
diff
changeset
|
1773 ergo_format_byte("requested expansion amount") |
20213c8a3c40
7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents:
3886
diff
changeset
|
1774 ergo_format_byte("attempted expansion amount"), |
20213c8a3c40
7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents:
3886
diff
changeset
|
1775 expand_bytes, aligned_expand_bytes); |
2188
c33825b68624
6923430: G1: assert(res != 0,"This should have worked.")
johnc
parents:
2173
diff
changeset
|
1776 |
3766 | 1777 // First commit the memory. |
1778 HeapWord* old_end = (HeapWord*) _g1_storage.high(); | |
2188
c33825b68624
6923430: G1: assert(res != 0,"This should have worked.")
johnc
parents:
2173
diff
changeset
|
1779 bool successful = _g1_storage.expand_by(aligned_expand_bytes); |
c33825b68624
6923430: G1: assert(res != 0,"This should have worked.")
johnc
parents:
2173
diff
changeset
|
1780 if (successful) { |
3766 | 1781 // Then propagate this update to the necessary data structures. |
1782 HeapWord* new_end = (HeapWord*) _g1_storage.high(); | |
1783 update_committed_space(old_end, new_end); | |
1784 | |
1785 FreeRegionList expansion_list("Local Expansion List"); | |
1786 MemRegion mr = _hrs.expand_by(old_end, new_end, &expansion_list); | |
1787 assert(mr.start() == old_end, "post-condition"); | |
1788 // mr might be a smaller region than what was requested if | |
1789 // expand_by() was unable to allocate the HeapRegion instances | |
1790 assert(mr.end() <= new_end, "post-condition"); | |
1791 | |
1792 size_t actual_expand_bytes = mr.byte_size(); | |
1793 assert(actual_expand_bytes <= aligned_expand_bytes, "post-condition"); | |
1794 assert(actual_expand_bytes == expansion_list.total_capacity_bytes(), | |
1795 "post-condition"); | |
1796 if (actual_expand_bytes < aligned_expand_bytes) { | |
1797 // We could not expand _hrs to the desired size. In this case we | |
1798 // need to shrink the committed space accordingly. | |
1799 assert(mr.end() < new_end, "invariant"); | |
1800 | |
1801 size_t diff_bytes = aligned_expand_bytes - actual_expand_bytes; | |
1802 // First uncommit the memory. | |
1803 _g1_storage.shrink_by(diff_bytes); | |
1804 // Then propagate this update to the necessary data structures. | |
1805 update_committed_space(new_end, mr.end()); | |
2188
c33825b68624
6923430: G1: assert(res != 0,"This should have worked.")
johnc
parents:
2173
diff
changeset
|
1806 } |
3766 | 1807 _free_list.add_as_tail(&expansion_list); |
3778
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
1808 |
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
1809 if (_hr_printer.is_active()) { |
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
1810 HeapWord* curr = mr.start(); |
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
1811 while (curr < mr.end()) { |
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
1812 HeapWord* curr_end = curr + HeapRegion::GrainWords; |
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
1813 _hr_printer.commit(curr, curr_end); |
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
1814 curr = curr_end; |
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
1815 } |
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
1816 assert(curr == mr.end(), "post-condition"); |
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
1817 } |
3920
af2ab04e0038
6929868: G1: introduce min / max young gen size bounds
brutisso
parents:
3919
diff
changeset
|
1818 g1_policy()->record_new_heap_size(n_regions()); |
2188
c33825b68624
6923430: G1: assert(res != 0,"This should have worked.")
johnc
parents:
2173
diff
changeset
|
1819 } else { |
3914
20213c8a3c40
7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents:
3886
diff
changeset
|
1820 ergo_verbose0(ErgoHeapSizing, |
20213c8a3c40
7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents:
3886
diff
changeset
|
1821 "did not expand the heap", |
20213c8a3c40
7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents:
3886
diff
changeset
|
1822 ergo_format_reason("heap expansion operation failed")); |
2188
c33825b68624
6923430: G1: assert(res != 0,"This should have worked.")
johnc
parents:
2173
diff
changeset
|
1823 // The expansion of the virtual storage space was unsuccessful. |
c33825b68624
6923430: G1: assert(res != 0,"This should have worked.")
johnc
parents:
2173
diff
changeset
|
1824 // Let's see if it was because we ran out of swap. |
c33825b68624
6923430: G1: assert(res != 0,"This should have worked.")
johnc
parents:
2173
diff
changeset
|
1825 if (G1ExitOnExpansionFailure && |
c33825b68624
6923430: G1: assert(res != 0,"This should have worked.")
johnc
parents:
2173
diff
changeset
|
1826 _g1_storage.uncommitted_size() >= aligned_expand_bytes) { |
c33825b68624
6923430: G1: assert(res != 0,"This should have worked.")
johnc
parents:
2173
diff
changeset
|
1827 // We had head room... |
c33825b68624
6923430: G1: assert(res != 0,"This should have worked.")
johnc
parents:
2173
diff
changeset
|
1828 vm_exit_out_of_memory(aligned_expand_bytes, "G1 heap expansion"); |
342 | 1829 } |
1830 } | |
2188
c33825b68624
6923430: G1: assert(res != 0,"This should have worked.")
johnc
parents:
2173
diff
changeset
|
1831 return successful; |
342 | 1832 } |
1833 | |
3766 | 1834 void G1CollectedHeap::shrink_helper(size_t shrink_bytes) { |
342 | 1835 size_t old_mem_size = _g1_storage.committed_size(); |
1836 size_t aligned_shrink_bytes = | |
1837 ReservedSpace::page_align_size_down(shrink_bytes); | |
1838 aligned_shrink_bytes = align_size_down(aligned_shrink_bytes, | |
1839 HeapRegion::GrainBytes); | |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
1840 uint num_regions_deleted = 0; |
3766 | 1841 MemRegion mr = _hrs.shrink_by(aligned_shrink_bytes, &num_regions_deleted); |
1842 HeapWord* old_end = (HeapWord*) _g1_storage.high(); | |
1843 assert(mr.end() == old_end, "post-condition"); | |
3914
20213c8a3c40
7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents:
3886
diff
changeset
|
1844 |
20213c8a3c40
7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents:
3886
diff
changeset
|
1845 ergo_verbose3(ErgoHeapSizing, |
20213c8a3c40
7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents:
3886
diff
changeset
|
1846 "shrink the heap", |
20213c8a3c40
7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents:
3886
diff
changeset
|
1847 ergo_format_byte("requested shrinking amount") |
20213c8a3c40
7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents:
3886
diff
changeset
|
1848 ergo_format_byte("aligned shrinking amount") |
20213c8a3c40
7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents:
3886
diff
changeset
|
1849 ergo_format_byte("attempted shrinking amount"), |
20213c8a3c40
7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents:
3886
diff
changeset
|
1850 shrink_bytes, aligned_shrink_bytes, mr.byte_size()); |
3766 | 1851 if (mr.byte_size() > 0) { |
3778
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
1852 if (_hr_printer.is_active()) { |
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
1853 HeapWord* curr = mr.end(); |
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
1854 while (curr > mr.start()) { |
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
1855 HeapWord* curr_end = curr; |
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
1856 curr -= HeapRegion::GrainWords; |
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
1857 _hr_printer.uncommit(curr, curr_end); |
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
1858 } |
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
1859 assert(curr == mr.start(), "post-condition"); |
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
1860 } |
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
1861 |
342 | 1862 _g1_storage.shrink_by(mr.byte_size()); |
3766 | 1863 HeapWord* new_end = (HeapWord*) _g1_storage.high(); |
1864 assert(mr.start() == new_end, "post-condition"); | |
1865 | |
1866 _expansion_regions += num_regions_deleted; | |
1867 update_committed_space(old_end, new_end); | |
1868 HeapRegionRemSet::shrink_heap(n_regions()); | |
3920
af2ab04e0038
6929868: G1: introduce min / max young gen size bounds
brutisso
parents:
3919
diff
changeset
|
1869 g1_policy()->record_new_heap_size(n_regions()); |
3914
20213c8a3c40
7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents:
3886
diff
changeset
|
1870 } else { |
20213c8a3c40
7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents:
3886
diff
changeset
|
1871 ergo_verbose0(ErgoHeapSizing, |
20213c8a3c40
7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents:
3886
diff
changeset
|
1872 "did not shrink the heap", |
20213c8a3c40
7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents:
3886
diff
changeset
|
1873 ergo_format_reason("heap shrinking operation failed")); |
342 | 1874 } |
1875 } | |
1876 | |
1877 void G1CollectedHeap::shrink(size_t shrink_bytes) { | |
2152 | 1878 verify_region_sets_optional(); |
1879 | |
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
1880 // We should only reach here at the end of a Full GC which means we |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
1881 // should not not be holding to any GC alloc regions. The method |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
1882 // below will make sure of that and do any remaining clean up. |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
1883 abandon_gc_alloc_regions(); |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
1884 |
2152 | 1885 // Instead of tearing down / rebuilding the free lists here, we |
1886 // could instead use the remove_all_pending() method on free_list to | |
1887 // remove only the ones that we need to remove. | |
4072 | 1888 tear_down_region_sets(true /* free_list_only */); |
342 | 1889 shrink_helper(shrink_bytes); |
4072 | 1890 rebuild_region_sets(true /* free_list_only */); |
2152 | 1891 |
3766 | 1892 _hrs.verify_optional(); |
2152 | 1893 verify_region_sets_optional(); |
342 | 1894 } |
1895 | |
1896 // Public methods. | |
1897 | |
1898 #ifdef _MSC_VER // the use of 'this' below gets a warning, make it go away | |
1899 #pragma warning( disable:4355 ) // 'this' : used in base member initializer list | |
1900 #endif // _MSC_VER | |
1901 | |
1902 | |
1903 G1CollectedHeap::G1CollectedHeap(G1CollectorPolicy* policy_) : | |
1904 SharedHeap(policy_), | |
1905 _g1_policy(policy_), | |
1111 | 1906 _dirty_card_queue_set(false), |
1705 | 1907 _into_cset_dirty_card_queue_set(false), |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
1908 _is_alive_closure_cm(this), |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
1909 _is_alive_closure_stw(this), |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
1910 _ref_processor_cm(NULL), |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
1911 _ref_processor_stw(NULL), |
342 | 1912 _process_strong_tasks(new SubTasksDone(G1H_PS_NumElements)), |
1913 _bot_shared(NULL), | |
1914 _evac_failure_scan_stack(NULL) , | |
1915 _mark_in_progress(false), | |
2152 | 1916 _cg1r(NULL), _summary_bytes_used(0), |
3980
8229bd737950
7075646: G1: fix inconsistencies in the monitoring data
tonyp
parents:
3979
diff
changeset
|
1917 _g1mm(NULL), |
342 | 1918 _refine_cte_cl(NULL), |
1919 _full_collection(false), | |
2152 | 1920 _free_list("Master Free List"), |
1921 _secondary_free_list("Secondary Free List"), | |
4072 | 1922 _old_set("Old Set"), |
2152 | 1923 _humongous_set("Master Humongous Set"), |
1924 _free_regions_coming(false), | |
342 | 1925 _young_list(new YoungList(this)), |
1926 _gc_time_stamp(0), | |
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
1927 _retained_old_gc_alloc_region(NULL), |
6595 | 1928 _survivor_plab_stats(YoungPLABSize, PLABWeight), |
1929 _old_plab_stats(OldPLABSize, PLABWeight), | |
4781
bacb651cf5bf
7113006: G1: excessive ergo output when an evac failure happens
tonyp
parents:
4728
diff
changeset
|
1930 _expand_heap_after_alloc_failure(true), |
526 | 1931 _surviving_young_words(NULL), |
6120
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
1932 _old_marking_cycles_started(0), |
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
1933 _old_marking_cycles_completed(0), |
526 | 1934 _in_cset_fast_test(NULL), |
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
1935 _in_cset_fast_test_base(NULL), |
4709
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
1936 _dirty_cards_region_list(NULL), |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
1937 _worker_cset_start_region(NULL), |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
1938 _worker_cset_start_region_time_stamp(NULL) { |
342 | 1939 _g1h = this; // To catch bugs. |
1940 if (_process_strong_tasks == NULL || !_process_strong_tasks->valid()) { | |
1941 vm_exit_during_initialization("Failed necessary allocation."); | |
1942 } | |
942
2c79770d1f6e
6819085: G1: use larger and/or user settable region size
tonyp
parents:
941
diff
changeset
|
1943 |
2c79770d1f6e
6819085: G1: use larger and/or user settable region size
tonyp
parents:
941
diff
changeset
|
1944 _humongous_object_threshold_in_words = HeapRegion::GrainWords / 2; |
2c79770d1f6e
6819085: G1: use larger and/or user settable region size
tonyp
parents:
941
diff
changeset
|
1945 |
342 | 1946 int n_queues = MAX2((int)ParallelGCThreads, 1); |
1947 _task_queues = new RefToScanQueueSet(n_queues); | |
1948 | |
1949 int n_rem_sets = HeapRegionRemSet::num_par_rem_sets(); | |
1950 assert(n_rem_sets > 0, "Invariant."); | |
1951 | |
1952 HeapRegionRemSetIterator** iter_arr = | |
6197 | 1953 NEW_C_HEAP_ARRAY(HeapRegionRemSetIterator*, n_queues, mtGC); |
342 | 1954 for (int i = 0; i < n_queues; i++) { |
1955 iter_arr[i] = new HeapRegionRemSetIterator(); | |
1956 } | |
1957 _rem_set_iterator = iter_arr; | |
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); | |
4709
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
1961 |
342 | 1962 for (int i = 0; i < n_queues; i++) { |
1963 RefToScanQueue* q = new RefToScanQueue(); | |
1964 q->initialize(); | |
1965 _task_queues->register_queue(i, q); | |
1966 } | |
1967 | |
4709
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
1968 clear_cset_start_regions(); |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
1969 |
6629
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
1970 // Initialize the G1EvacuationFailureALot counters and flags. |
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
1971 NOT_PRODUCT(reset_evacuation_should_fail();) |
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
1972 |
342 | 1973 guarantee(_task_queues != NULL, "task_queues allocation failure."); |
1974 } | |
1975 | |
1976 jint G1CollectedHeap::initialize() { | |
1166 | 1977 CollectedHeap::pre_initialize(); |
342 | 1978 os::enable_vtime(); |
1979 | |
6007
5c86f8211d1e
7160728: Introduce an extra logging level for G1 logging
brutisso
parents:
5987
diff
changeset
|
1980 G1Log::init(); |
5c86f8211d1e
7160728: Introduce an extra logging level for G1 logging
brutisso
parents:
5987
diff
changeset
|
1981 |
342 | 1982 // Necessary to satisfy locking discipline assertions. |
1983 | |
1984 MutexLocker x(Heap_lock); | |
1985 | |
3778
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
1986 // We have to initialize the printer before committing the heap, as |
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
1987 // it will be used then. |
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
1988 _hr_printer.set_active(G1PrintHeapRegions); |
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
1989 |
342 | 1990 // While there are no constraints in the GC code that HeapWordSize |
1991 // be any particular value, there are multiple other areas in the | |
1992 // system which believe this to be true (e.g. oop->object_size in some | |
1993 // cases incorrectly returns the size in wordSize units rather than | |
1994 // HeapWordSize). | |
1995 guarantee(HeapWordSize == wordSize, "HeapWordSize must equal wordSize"); | |
1996 | |
1997 size_t init_byte_size = collector_policy()->initial_heap_byte_size(); | |
1998 size_t max_byte_size = collector_policy()->max_heap_byte_size(); | |
1999 | |
2000 // Ensure that the sizes are properly aligned. | |
2001 Universe::check_alignment(init_byte_size, HeapRegion::GrainBytes, "g1 heap"); | |
2002 Universe::check_alignment(max_byte_size, HeapRegion::GrainBytes, "g1 heap"); | |
2003 | |
2004 _cg1r = new ConcurrentG1Refine(); | |
2005 | |
2006 // Reserve the maximum. | |
642
660978a2a31a
6791178: Specialize for zero as the compressed oop vm heap base
kvn
parents:
620
diff
changeset
|
2007 |
3824
6aa4feb8a366
7069863: G1: SIGSEGV running SPECjbb2011 and -UseBiasedLocking
johnc
parents:
3823
diff
changeset
|
2008 // When compressed oops are enabled, the preferred heap base |
6aa4feb8a366
7069863: G1: SIGSEGV running SPECjbb2011 and -UseBiasedLocking
johnc
parents:
3823
diff
changeset
|
2009 // is calculated by subtracting the requested size from the |
6aa4feb8a366
7069863: G1: SIGSEGV running SPECjbb2011 and -UseBiasedLocking
johnc
parents:
3823
diff
changeset
|
2010 // 32Gb boundary and using the result as the base address for |
6aa4feb8a366
7069863: G1: SIGSEGV running SPECjbb2011 and -UseBiasedLocking
johnc
parents:
3823
diff
changeset
|
2011 // heap reservation. If the requested size is not aligned to |
6aa4feb8a366
7069863: G1: SIGSEGV running SPECjbb2011 and -UseBiasedLocking
johnc
parents:
3823
diff
changeset
|
2012 // HeapRegion::GrainBytes (i.e. the alignment that is passed |
6aa4feb8a366
7069863: G1: SIGSEGV running SPECjbb2011 and -UseBiasedLocking
johnc
parents:
3823
diff
changeset
|
2013 // into the ReservedHeapSpace constructor) then the actual |
6aa4feb8a366
7069863: G1: SIGSEGV running SPECjbb2011 and -UseBiasedLocking
johnc
parents:
3823
diff
changeset
|
2014 // base of the reserved heap may end up differing from the |
6aa4feb8a366
7069863: G1: SIGSEGV running SPECjbb2011 and -UseBiasedLocking
johnc
parents:
3823
diff
changeset
|
2015 // address that was requested (i.e. the preferred heap base). |
6aa4feb8a366
7069863: G1: SIGSEGV running SPECjbb2011 and -UseBiasedLocking
johnc
parents:
3823
diff
changeset
|
2016 // If this happens then we could end up using a non-optimal |
6aa4feb8a366
7069863: G1: SIGSEGV running SPECjbb2011 and -UseBiasedLocking
johnc
parents:
3823
diff
changeset
|
2017 // compressed oops mode. |
6aa4feb8a366
7069863: G1: SIGSEGV running SPECjbb2011 and -UseBiasedLocking
johnc
parents:
3823
diff
changeset
|
2018 |
6aa4feb8a366
7069863: G1: SIGSEGV running SPECjbb2011 and -UseBiasedLocking
johnc
parents:
3823
diff
changeset
|
2019 // Since max_byte_size is aligned to the size of a heap region (checked |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
2020 // above). |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
2021 Universe::check_alignment(max_byte_size, HeapRegion::GrainBytes, "g1 heap"); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
2022 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
2023 ReservedSpace heap_rs = Universe::reserve_heap(max_byte_size, |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
2024 HeapRegion::GrainBytes); |
342 | 2025 |
2026 // It is important to do this in a way such that concurrent readers can't | |
2027 // temporarily think somethings in the heap. (I've actually seen this | |
2028 // happen in asserts: DLD.) | |
2029 _reserved.set_word_size(0); | |
2030 _reserved.set_start((HeapWord*)heap_rs.base()); | |
2031 _reserved.set_end((HeapWord*)(heap_rs.base() + heap_rs.size())); | |
2032 | |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
2033 _expansion_regions = (uint) (max_byte_size / HeapRegion::GrainBytes); |
342 | 2034 |
2035 // Create the gen rem set (and barrier set) for the entire reserved region. | |
2036 _rem_set = collector_policy()->create_rem_set(_reserved, 2); | |
2037 set_barrier_set(rem_set()->bs()); | |
2038 if (barrier_set()->is_a(BarrierSet::ModRef)) { | |
2039 _mr_bs = (ModRefBarrierSet*)_barrier_set; | |
2040 } else { | |
2041 vm_exit_during_initialization("G1 requires a mod ref bs."); | |
2042 return JNI_ENOMEM; | |
2043 } | |
2044 | |
2045 // Also create a G1 rem set. | |
1861 | 2046 if (mr_bs()->is_a(BarrierSet::CardTableModRef)) { |
2047 _g1_rem_set = new G1RemSet(this, (CardTableModRefBS*)mr_bs()); | |
342 | 2048 } else { |
1861 | 2049 vm_exit_during_initialization("G1 requires a cardtable mod ref bs."); |
2050 return JNI_ENOMEM; | |
342 | 2051 } |
2052 | |
2053 // Carve out the G1 part of the heap. | |
2054 | |
2055 ReservedSpace g1_rs = heap_rs.first_part(max_byte_size); | |
2056 _g1_reserved = MemRegion((HeapWord*)g1_rs.base(), | |
2057 g1_rs.size()/HeapWordSize); | |
2058 | |
2059 _g1_storage.initialize(g1_rs, 0); | |
2060 _g1_committed = MemRegion((HeapWord*)_g1_storage.low(), (size_t) 0); | |
3766 | 2061 _hrs.initialize((HeapWord*) _g1_reserved.start(), |
2062 (HeapWord*) _g1_reserved.end(), | |
2063 _expansion_regions); | |
342 | 2064 |
807
d44bdab1c03d
6843694: G1: assert(index < _vs.committed_size(),"bad index"), g1BlockOffsetTable.inline.hpp:55
johnc
parents:
796
diff
changeset
|
2065 // 6843694 - ensure that the maximum region index can fit |
d44bdab1c03d
6843694: G1: assert(index < _vs.committed_size(),"bad index"), g1BlockOffsetTable.inline.hpp:55
johnc
parents:
796
diff
changeset
|
2066 // in the remembered set structures. |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
2067 const uint max_region_idx = (1U << (sizeof(RegionIdx_t)*BitsPerByte-1)) - 1; |
807
d44bdab1c03d
6843694: G1: assert(index < _vs.committed_size(),"bad index"), g1BlockOffsetTable.inline.hpp:55
johnc
parents:
796
diff
changeset
|
2068 guarantee((max_regions() - 1) <= max_region_idx, "too many regions"); |
d44bdab1c03d
6843694: G1: assert(index < _vs.committed_size(),"bad index"), g1BlockOffsetTable.inline.hpp:55
johnc
parents:
796
diff
changeset
|
2069 |
d44bdab1c03d
6843694: G1: assert(index < _vs.committed_size(),"bad index"), g1BlockOffsetTable.inline.hpp:55
johnc
parents:
796
diff
changeset
|
2070 size_t max_cards_per_region = ((size_t)1 << (sizeof(CardIdx_t)*BitsPerByte-1)) - 1; |
942
2c79770d1f6e
6819085: G1: use larger and/or user settable region size
tonyp
parents:
941
diff
changeset
|
2071 guarantee(HeapRegion::CardsPerRegion > 0, "make sure it's initialized"); |
3986
65a8ff39a6da
7095194: G1: HeapRegion::GrainBytes, GrainWords, and CardsPerRegion should be size_t
johnc
parents:
3983
diff
changeset
|
2072 guarantee(HeapRegion::CardsPerRegion < max_cards_per_region, |
942
2c79770d1f6e
6819085: G1: use larger and/or user settable region size
tonyp
parents:
941
diff
changeset
|
2073 "too many cards per region"); |
807
d44bdab1c03d
6843694: G1: assert(index < _vs.committed_size(),"bad index"), g1BlockOffsetTable.inline.hpp:55
johnc
parents:
796
diff
changeset
|
2074 |
2152 | 2075 HeapRegionSet::set_unrealistically_long_length(max_regions() + 1); |
2076 | |
342 | 2077 _bot_shared = new G1BlockOffsetSharedArray(_reserved, |
2078 heap_word_size(init_byte_size)); | |
2079 | |
2080 _g1h = this; | |
2081 | |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2082 _in_cset_fast_test_length = max_regions(); |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
2083 _in_cset_fast_test_base = |
6197 | 2084 NEW_C_HEAP_ARRAY(bool, (size_t) _in_cset_fast_test_length, mtGC); |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2085 |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2086 // We're biasing _in_cset_fast_test to avoid subtracting the |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2087 // beginning of the heap every time we want to index; basically |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2088 // it's the same with what we do with the card table. |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2089 _in_cset_fast_test = _in_cset_fast_test_base - |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
2090 ((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
|
2091 |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2092 // Clear the _cset_fast_test bitmap in anticipation of adding |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2093 // regions to the incremental collection set for the first |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2094 // evacuation pause. |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2095 clear_cset_fast_test(); |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2096 |
342 | 2097 // Create the ConcurrentMark data structure and thread. |
2098 // (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
|
2099 _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
|
2100 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
|
2101 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
|
2102 return JNI_ENOMEM; |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
7207
diff
changeset
|
2103 } |
342 | 2104 _cmThread = _cm->cmThread(); |
2105 | |
2106 // Initialize the from_card cache structure of HeapRegionRemSet. | |
2107 HeapRegionRemSet::init_heap(max_regions()); | |
2108 | |
677 | 2109 // Now expand into the initial heap size. |
2188
c33825b68624
6923430: G1: assert(res != 0,"This should have worked.")
johnc
parents:
2173
diff
changeset
|
2110 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
|
2111 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
|
2112 return JNI_ENOMEM; |
c33825b68624
6923430: G1: assert(res != 0,"This should have worked.")
johnc
parents:
2173
diff
changeset
|
2113 } |
342 | 2114 |
2115 // Perform any initialization actions delegated to the policy. | |
2116 g1_policy()->init(); | |
2117 | |
2118 _refine_cte_cl = | |
2119 new RefineCardTableEntryClosure(ConcurrentG1RefineThread::sts(), | |
2120 g1_rem_set(), | |
2121 concurrent_g1_refine()); | |
2122 JavaThread::dirty_card_queue_set().set_closure(_refine_cte_cl); | |
2123 | |
2124 JavaThread::satb_mark_queue_set().initialize(SATB_Q_CBL_mon, | |
2125 SATB_Q_FL_lock, | |
1111 | 2126 G1SATBProcessCompletedThreshold, |
342 | 2127 Shared_SATB_Q_lock); |
794 | 2128 |
2129 JavaThread::dirty_card_queue_set().initialize(DirtyCardQ_CBL_mon, | |
2130 DirtyCardQ_FL_lock, | |
1111 | 2131 concurrent_g1_refine()->yellow_zone(), |
2132 concurrent_g1_refine()->red_zone(), | |
794 | 2133 Shared_DirtyCardQ_lock); |
2134 | |
616
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
2135 if (G1DeferredRSUpdate) { |
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
2136 dirty_card_queue_set().initialize(DirtyCardQ_CBL_mon, |
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
2137 DirtyCardQ_FL_lock, |
1111 | 2138 -1, // never trigger processing |
2139 -1, // no limit on length | |
616
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
2140 Shared_DirtyCardQ_lock, |
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
2141 &JavaThread::dirty_card_queue_set()); |
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
2142 } |
1705 | 2143 |
2144 // Initialize the card queue set used to hold cards containing | |
2145 // references into the collection set. | |
2146 _into_cset_dirty_card_queue_set.initialize(DirtyCardQ_CBL_mon, | |
2147 DirtyCardQ_FL_lock, | |
2148 -1, // never trigger processing | |
2149 -1, // no limit on length | |
2150 Shared_DirtyCardQ_lock, | |
2151 &JavaThread::dirty_card_queue_set()); | |
2152 | |
342 | 2153 // In case we're keeping closure specialization stats, initialize those |
2154 // counts and that mechanism. | |
2155 SpecializationStats::clear(); | |
2156 | |
2157 // Do later initialization work for concurrent refinement. | |
2158 _cg1r->init(); | |
2159 | |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2160 // 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
|
2161 // 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
|
2162 // space here, lots of asserts fire. |
3766 | 2163 |
2164 HeapRegion* dummy_region = new_heap_region(0 /* index of bottom region */, | |
2165 _g1_reserved.start()); | |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2166 // 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
|
2167 // 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
|
2168 // 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
|
2169 // 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
|
2170 dummy_region->set_young(); |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2171 // Make sure it's full. |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2172 dummy_region->set_top(dummy_region->end()); |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2173 G1AllocRegion::setup(this, dummy_region); |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2174 |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2175 init_mutator_alloc_region(); |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2176 |
3289
b52782ae3880
6946417: G1: Java VisualVM does not support G1 properly.
jmasa
parents:
3285
diff
changeset
|
2177 // 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
|
2178 // values in the heap have been properly initialized. |
3980
8229bd737950
7075646: G1: fix inconsistencies in the monitoring data
tonyp
parents:
3979
diff
changeset
|
2179 _g1mm = new G1MonitoringSupport(this); |
3289
b52782ae3880
6946417: G1: Java VisualVM does not support G1 properly.
jmasa
parents:
3285
diff
changeset
|
2180 |
342 | 2181 return JNI_OK; |
2182 } | |
2183 | |
2184 void G1CollectedHeap::ref_processing_init() { | |
1974
fd1d227ef1b9
6983204: G1: Nightly test nsk/regression/b4958615 failing with +ExplicitGCInvokesConcurrent
johnc
parents:
1973
diff
changeset
|
2185 // Reference processing in G1 currently works as follows: |
fd1d227ef1b9
6983204: G1: Nightly test nsk/regression/b4958615 failing with +ExplicitGCInvokesConcurrent
johnc
parents:
1973
diff
changeset
|
2186 // |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2187 // * There are two reference processor instances. One is |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2188 // used to record and process discovered references |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2189 // during concurrent marking; the other is used to |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2190 // record and process references during STW pauses |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2191 // (both full and incremental). |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2192 // * Both ref processors need to 'span' the entire heap as |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2193 // the regions in the collection set may be dotted around. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2194 // |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2195 // * For the concurrent marking ref processor: |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2196 // * Reference discovery is enabled at initial marking. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2197 // * Reference discovery is disabled and the discovered |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2198 // references processed etc during remarking. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2199 // * Reference discovery is MT (see below). |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2200 // * Reference discovery requires a barrier (see below). |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2201 // * Reference processing may or may not be MT |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2202 // (depending on the value of ParallelRefProcEnabled |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2203 // and ParallelGCThreads). |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2204 // * A full GC disables reference discovery by the CM |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2205 // ref processor and abandons any entries on it's |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2206 // discovered lists. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2207 // |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2208 // * For the STW processor: |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2209 // * 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
|
2210 // * Processing and enqueueing during a full GC is non-MT. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2211 // * During a full GC, references are processed after marking. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2212 // |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2213 // * 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
|
2214 // of an incremental evacuation pause. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2215 // * References are processed near the end of a STW evacuation pause. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2216 // * For both types of GC: |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2217 // * Discovery is atomic - i.e. not concurrent. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2218 // * Reference discovery will not need a barrier. |
1974
fd1d227ef1b9
6983204: G1: Nightly test nsk/regression/b4958615 failing with +ExplicitGCInvokesConcurrent
johnc
parents:
1973
diff
changeset
|
2219 |
342 | 2220 SharedHeap::ref_processing_init(); |
2221 MemRegion mr = reserved_region(); | |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2222 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2223 // Concurrent Mark ref processor |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2224 _ref_processor_cm = |
2369
92da084fefc9
6668573: CMS: reference processing crash if ParallelCMSThreads > ParallelGCThreads
ysr
parents:
2361
diff
changeset
|
2225 new ReferenceProcessor(mr, // span |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2226 ParallelRefProcEnabled && (ParallelGCThreads > 1), |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2227 // mt processing |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2228 (int) ParallelGCThreads, |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2229 // degree of mt processing |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2230 (ParallelGCThreads > 1) || (ConcGCThreads > 1), |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2231 // mt discovery |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2232 (int) MAX2(ParallelGCThreads, ConcGCThreads), |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2233 // degree of mt discovery |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2234 false, |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2235 // Reference discovery is not atomic |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2236 &_is_alive_closure_cm, |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2237 // is alive closure |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2238 // (for efficiency/performance) |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2239 true); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2240 // Setting next fields of discovered |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2241 // lists requires a barrier. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2242 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2243 // STW ref processor |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2244 _ref_processor_stw = |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2245 new ReferenceProcessor(mr, // span |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2246 ParallelRefProcEnabled && (ParallelGCThreads > 1), |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2247 // mt processing |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2248 MAX2((int)ParallelGCThreads, 1), |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2249 // degree of mt processing |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2250 (ParallelGCThreads > 1), |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2251 // mt discovery |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2252 MAX2((int)ParallelGCThreads, 1), |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2253 // degree of mt discovery |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2254 true, |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2255 // Reference discovery is atomic |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2256 &_is_alive_closure_stw, |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2257 // is alive closure |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2258 // (for efficiency/performance) |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2259 false); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2260 // Setting next fields of discovered |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2261 // lists requires a barrier. |
342 | 2262 } |
2263 | |
2264 size_t G1CollectedHeap::capacity() const { | |
2265 return _g1_committed.byte_size(); | |
2266 } | |
2267 | |
6254
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2268 void G1CollectedHeap::reset_gc_time_stamps(HeapRegion* hr) { |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2269 assert(!hr->continuesHumongous(), "pre-condition"); |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2270 hr->reset_gc_time_stamp(); |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2271 if (hr->startsHumongous()) { |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2272 uint first_index = hr->hrs_index() + 1; |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2273 uint last_index = hr->last_hc_index(); |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2274 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
|
2275 HeapRegion* chr = region_at(i); |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2276 assert(chr->continuesHumongous(), "sanity"); |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2277 chr->reset_gc_time_stamp(); |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2278 } |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2279 } |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2280 } |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2281 |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2282 #ifndef PRODUCT |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2283 class CheckGCTimeStampsHRClosure : public HeapRegionClosure { |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2284 private: |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2285 unsigned _gc_time_stamp; |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2286 bool _failures; |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2287 |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2288 public: |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2289 CheckGCTimeStampsHRClosure(unsigned gc_time_stamp) : |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2290 _gc_time_stamp(gc_time_stamp), _failures(false) { } |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2291 |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2292 virtual bool doHeapRegion(HeapRegion* hr) { |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2293 unsigned region_gc_time_stamp = hr->get_gc_time_stamp(); |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2294 if (_gc_time_stamp != region_gc_time_stamp) { |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2295 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
|
2296 "expected %d", HR_FORMAT_PARAMS(hr), |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2297 region_gc_time_stamp, _gc_time_stamp); |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2298 _failures = true; |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2299 } |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2300 return false; |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2301 } |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2302 |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2303 bool failures() { return _failures; } |
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 |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2306 void G1CollectedHeap::check_gc_time_stamps() { |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2307 CheckGCTimeStampsHRClosure cl(_gc_time_stamp); |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2308 heap_region_iterate(&cl); |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2309 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
|
2310 } |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2311 #endif // PRODUCT |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2312 |
1705 | 2313 void G1CollectedHeap::iterate_dirty_card_closure(CardTableEntryClosure* cl, |
2314 DirtyCardQueue* into_cset_dcq, | |
2315 bool concurrent, | |
342 | 2316 int worker_i) { |
889 | 2317 // Clean cards in the hot card cache |
1705 | 2318 concurrent_g1_refine()->clean_up_cache(worker_i, g1_rem_set(), into_cset_dcq); |
889 | 2319 |
342 | 2320 DirtyCardQueueSet& dcqs = JavaThread::dirty_card_queue_set(); |
2321 int n_completed_buffers = 0; | |
1705 | 2322 while (dcqs.apply_closure_to_completed_buffer(cl, worker_i, 0, true)) { |
342 | 2323 n_completed_buffers++; |
2324 } | |
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
|
2325 g1_policy()->phase_times()->record_update_rs_processed_buffers(worker_i, n_completed_buffers); |
342 | 2326 dcqs.clear_n_completed_buffers(); |
2327 assert(!dcqs.completed_buffers_exist_dirty(), "Completed buffers exist!"); | |
2328 } | |
2329 | |
2330 | |
2331 // Computes the sum of the storage used by the various regions. | |
2332 | |
2333 size_t G1CollectedHeap::used() const { | |
862
36b5611220a7
6863216: Clean up debugging debris inadvertently pushed with 6700789
ysr
parents:
861
diff
changeset
|
2334 assert(Heap_lock->owner() != NULL, |
36b5611220a7
6863216: Clean up debugging debris inadvertently pushed with 6700789
ysr
parents:
861
diff
changeset
|
2335 "Should be owned on this thread's behalf."); |
342 | 2336 size_t result = _summary_bytes_used; |
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
2337 // 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
|
2338 HeapRegion* hr = _mutator_alloc_region.get(); |
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
2339 if (hr != NULL) |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
2340 result += hr->used(); |
342 | 2341 return result; |
2342 } | |
2343 | |
846
42d84bbbecf4
6859911: G1: assert(Heap_lock->owner() = NULL, "Should be owned on this thread's behalf")
tonyp
parents:
845
diff
changeset
|
2344 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
|
2345 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
|
2346 return result; |
42d84bbbecf4
6859911: G1: assert(Heap_lock->owner() = NULL, "Should be owned on this thread's behalf")
tonyp
parents:
845
diff
changeset
|
2347 } |
42d84bbbecf4
6859911: G1: assert(Heap_lock->owner() = NULL, "Should be owned on this thread's behalf")
tonyp
parents:
845
diff
changeset
|
2348 |
342 | 2349 class SumUsedClosure: public HeapRegionClosure { |
2350 size_t _used; | |
2351 public: | |
2352 SumUsedClosure() : _used(0) {} | |
2353 bool doHeapRegion(HeapRegion* r) { | |
2354 if (!r->continuesHumongous()) { | |
2355 _used += r->used(); | |
2356 } | |
2357 return false; | |
2358 } | |
2359 size_t result() { return _used; } | |
2360 }; | |
2361 | |
2362 size_t G1CollectedHeap::recalculate_used() const { | |
2363 SumUsedClosure blk; | |
3766 | 2364 heap_region_iterate(&blk); |
342 | 2365 return blk.result(); |
2366 } | |
2367 | |
2368 size_t G1CollectedHeap::unsafe_max_alloc() { | |
2152 | 2369 if (free_regions() > 0) return HeapRegion::GrainBytes; |
342 | 2370 // otherwise, is there space in the current allocation region? |
2371 | |
2372 // We need to store the current allocation region in a local variable | |
2373 // here. The problem is that this method doesn't take any locks and | |
2374 // there may be other threads which overwrite the current allocation | |
2375 // region field. attempt_allocation(), for example, sets it to NULL | |
2376 // and this can happen *after* the NULL check here but before the call | |
2377 // to free(), resulting in a SIGSEGV. Note that this doesn't appear | |
2378 // to be a problem in the optimized build, since the two loads of the | |
2379 // current allocation region field are optimized away. | |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2380 HeapRegion* hr = _mutator_alloc_region.get(); |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2381 if (hr == NULL) { |
342 | 2382 return 0; |
2383 } | |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2384 return hr->free(); |
342 | 2385 } |
2386 | |
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2387 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
|
2388 switch (cause) { |
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2389 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
|
2390 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
|
2391 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
|
2392 default: return false; |
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2393 } |
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2394 } |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2395 |
3285
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2396 #ifndef PRODUCT |
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2397 void G1CollectedHeap::allocate_dummy_regions() { |
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2398 // Let's fill up most of the region |
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2399 size_t word_size = HeapRegion::GrainWords - 1024; |
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2400 // 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
|
2401 guarantee(isHumongous(word_size), "sanity"); |
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2402 |
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2403 for (uintx i = 0; i < G1DummyRegionsPerGC; ++i) { |
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2404 // 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
|
2405 HeapWord* dummy_obj = humongous_obj_allocate(word_size); |
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2406 if (dummy_obj != NULL) { |
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2407 MemRegion mr(dummy_obj, word_size); |
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2408 CollectedHeap::fill_with_object(mr); |
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2409 } else { |
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2410 // 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
|
2411 // again. Let's get out of the loop. |
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2412 break; |
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2413 } |
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2414 } |
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2415 } |
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2416 #endif // !PRODUCT |
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2417 |
6120
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2418 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
|
2419 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
|
2420 _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
|
2421 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
|
2422 _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
|
2423 |
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2424 _old_marking_cycles_started++; |
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2425 } |
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2426 |
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2427 void G1CollectedHeap::increment_old_marking_cycles_completed(bool concurrent) { |
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2428 MonitorLockerEx x(FullGCCount_lock, Mutex::_no_safepoint_check_flag); |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2429 |
2030
fb712ff22571
7000559: G1: assertion failure !outer || (full_collections_started == _full_collections_completed + 1)
tonyp
parents:
1995
diff
changeset
|
2430 // 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
|
2431 // 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
|
2432 // 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
|
2433 // assert here. |
fb712ff22571
7000559: G1: assertion failure !outer || (full_collections_started == _full_collections_completed + 1)
tonyp
parents:
1995
diff
changeset
|
2434 |
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2435 // 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
|
2436 // 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
|
2437 // interrupt a concurrent cycle), the number of full collections |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2438 // 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
|
2439 // 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
|
2440 // behind the number of full collections started. |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2441 |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2442 // 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
|
2443 assert(concurrent || |
6120
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2444 (_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
|
2445 (_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
|
2446 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
|
2447 "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
|
2448 _old_marking_cycles_started, _old_marking_cycles_completed)); |
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2449 |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2450 // 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
|
2451 assert(!concurrent || |
6120
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2452 (_old_marking_cycles_started == _old_marking_cycles_completed + 1), |
2030
fb712ff22571
7000559: G1: assertion failure !outer || (full_collections_started == _full_collections_completed + 1)
tonyp
parents:
1995
diff
changeset
|
2453 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
|
2454 "_old_marking_cycles_started = %u " |
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2455 "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
|
2456 _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
|
2457 |
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2458 _old_marking_cycles_completed += 1; |
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2459 |
1840
4e0094bc41fa
6983311: G1: LoopTest hangs when run with -XX:+ExplicitInvokesConcurrent
johnc
parents:
1833
diff
changeset
|
2460 // 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
|
2461 // we wake up any waiters (especially when ExplicitInvokesConcurrent |
4e0094bc41fa
6983311: G1: LoopTest hangs when run with -XX:+ExplicitInvokesConcurrent
johnc
parents:
1833
diff
changeset
|
2462 // is set) so that if a waiter requests another System.gc() it doesn't |
4e0094bc41fa
6983311: G1: LoopTest hangs when run with -XX:+ExplicitInvokesConcurrent
johnc
parents:
1833
diff
changeset
|
2463 // incorrectly see that a marking cyle is still in progress. |
2030
fb712ff22571
7000559: G1: assertion failure !outer || (full_collections_started == _full_collections_completed + 1)
tonyp
parents:
1995
diff
changeset
|
2464 if (concurrent) { |
1840
4e0094bc41fa
6983311: G1: LoopTest hangs when run with -XX:+ExplicitInvokesConcurrent
johnc
parents:
1833
diff
changeset
|
2465 _cmThread->clear_in_progress(); |
4e0094bc41fa
6983311: G1: LoopTest hangs when run with -XX:+ExplicitInvokesConcurrent
johnc
parents:
1833
diff
changeset
|
2466 } |
4e0094bc41fa
6983311: G1: LoopTest hangs when run with -XX:+ExplicitInvokesConcurrent
johnc
parents:
1833
diff
changeset
|
2467 |
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2468 // 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
|
2469 // System.gc() with (with ExplicitGCInvokesConcurrent set or not) |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2470 // 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
|
2471 // waiting in VM_G1IncCollectionPause::doit_epilogue(). |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2472 FullGCCount_lock->notify_all(); |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2473 } |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2474 |
1088
3fc996d4edd2
6902303: G1: ScavengeALot should cause an incremental, rather than a full, collection
ysr
parents:
1045
diff
changeset
|
2475 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
|
2476 assert_heap_not_locked(); |
1088
3fc996d4edd2
6902303: G1: ScavengeALot should cause an incremental, rather than a full, collection
ysr
parents:
1045
diff
changeset
|
2477 |
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2478 unsigned int gc_count_before; |
6120
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2479 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
|
2480 bool retry_gc; |
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2481 |
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2482 do { |
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2483 retry_gc = false; |
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2484 |
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2485 { |
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2486 MutexLocker ml(Heap_lock); |
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2487 |
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2488 // 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
|
2489 gc_count_before = total_collections(); |
6120
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2490 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
|
2491 } |
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2492 |
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2493 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
|
2494 // 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
|
2495 // 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
|
2496 // we are not requesting a post-GC allocation. |
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2497 VM_G1IncCollectionPause op(gc_count_before, |
1973 | 2498 0, /* word_size */ |
4910
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2499 true, /* should_initiate_conc_mark */ |
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2500 g1_policy()->max_pause_time_ms(), |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2501 cause); |
5963
64bf7c8270cb
7147724: G1: hang in SurrogateLockerThread::manipulatePLL
johnc
parents:
4912
diff
changeset
|
2502 |
1088
3fc996d4edd2
6902303: G1: ScavengeALot should cause an incremental, rather than a full, collection
ysr
parents:
1045
diff
changeset
|
2503 VMThread::execute(&op); |
4910
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2504 if (!op.pause_succeeded()) { |
6120
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2505 if (old_marking_count_before == _old_marking_cycles_started) { |
5963
64bf7c8270cb
7147724: G1: hang in SurrogateLockerThread::manipulatePLL
johnc
parents:
4912
diff
changeset
|
2506 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
|
2507 } else { |
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2508 // 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
|
2509 // 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
|
2510 // 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
|
2511 } |
5963
64bf7c8270cb
7147724: G1: hang in SurrogateLockerThread::manipulatePLL
johnc
parents:
4912
diff
changeset
|
2512 |
64bf7c8270cb
7147724: G1: hang in SurrogateLockerThread::manipulatePLL
johnc
parents:
4912
diff
changeset
|
2513 if (retry_gc) { |
64bf7c8270cb
7147724: G1: hang in SurrogateLockerThread::manipulatePLL
johnc
parents:
4912
diff
changeset
|
2514 if (GC_locker::is_active_and_needs_gc()) { |
64bf7c8270cb
7147724: G1: hang in SurrogateLockerThread::manipulatePLL
johnc
parents:
4912
diff
changeset
|
2515 GC_locker::stall_until_clear(); |
64bf7c8270cb
7147724: G1: hang in SurrogateLockerThread::manipulatePLL
johnc
parents:
4912
diff
changeset
|
2516 } |
64bf7c8270cb
7147724: G1: hang in SurrogateLockerThread::manipulatePLL
johnc
parents:
4912
diff
changeset
|
2517 } |
4910
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2518 } |
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2519 } else { |
4910
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2520 if (cause == GCCause::_gc_locker |
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2521 DEBUG_ONLY(|| cause == GCCause::_scavenge_alot)) { |
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2522 |
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2523 // Schedule a standard evacuation pause. We're setting word_size |
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2524 // to 0 which means that we are not requesting a post-GC allocation. |
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2525 VM_G1IncCollectionPause op(gc_count_before, |
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2526 0, /* word_size */ |
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2527 false, /* should_initiate_conc_mark */ |
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2528 g1_policy()->max_pause_time_ms(), |
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2529 cause); |
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2530 VMThread::execute(&op); |
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2531 } else { |
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2532 // Schedule a Full GC. |
6120
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2533 VM_G1CollectFull op(gc_count_before, old_marking_count_before, cause); |
4910
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2534 VMThread::execute(&op); |
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2535 } |
1088
3fc996d4edd2
6902303: G1: ScavengeALot should cause an incremental, rather than a full, collection
ysr
parents:
1045
diff
changeset
|
2536 } |
4910
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2537 } while (retry_gc); |
342 | 2538 } |
2539 | |
2540 bool G1CollectedHeap::is_in(const void* p) const { | |
4708 | 2541 if (_g1_committed.contains(p)) { |
2542 // Given that we know that p is in the committed space, | |
2543 // heap_region_containing_raw() should successfully | |
2544 // return the containing region. | |
2545 HeapRegion* hr = heap_region_containing_raw(p); | |
342 | 2546 return hr->is_in(p); |
2547 } else { | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
2548 return false; |
342 | 2549 } |
2550 } | |
2551 | |
2552 // Iteration functions. | |
2553 | |
2554 // Iterates an OopClosure over all ref-containing fields of objects | |
2555 // within a HeapRegion. | |
2556 | |
2557 class IterateOopClosureRegionClosure: public HeapRegionClosure { | |
2558 MemRegion _mr; | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
2559 ExtendedOopClosure* _cl; |
342 | 2560 public: |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
2561 IterateOopClosureRegionClosure(MemRegion mr, ExtendedOopClosure* cl) |
342 | 2562 : _mr(mr), _cl(cl) {} |
2563 bool doHeapRegion(HeapRegion* r) { | |
6254
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2564 if (!r->continuesHumongous()) { |
342 | 2565 r->oop_iterate(_cl); |
2566 } | |
2567 return false; | |
2568 } | |
2569 }; | |
2570 | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
2571 void G1CollectedHeap::oop_iterate(ExtendedOopClosure* cl) { |
342 | 2572 IterateOopClosureRegionClosure blk(_g1_committed, cl); |
3766 | 2573 heap_region_iterate(&blk); |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
2574 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
2575 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
2576 void G1CollectedHeap::oop_iterate(MemRegion mr, ExtendedOopClosure* cl) { |
342 | 2577 IterateOopClosureRegionClosure blk(mr, cl); |
3766 | 2578 heap_region_iterate(&blk); |
342 | 2579 } |
2580 | |
2581 // Iterates an ObjectClosure over all objects within a HeapRegion. | |
2582 | |
2583 class IterateObjectClosureRegionClosure: public HeapRegionClosure { | |
2584 ObjectClosure* _cl; | |
2585 public: | |
2586 IterateObjectClosureRegionClosure(ObjectClosure* cl) : _cl(cl) {} | |
2587 bool doHeapRegion(HeapRegion* r) { | |
2588 if (! r->continuesHumongous()) { | |
2589 r->object_iterate(_cl); | |
2590 } | |
2591 return false; | |
2592 } | |
2593 }; | |
2594 | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
2595 void G1CollectedHeap::object_iterate(ObjectClosure* cl) { |
342 | 2596 IterateObjectClosureRegionClosure blk(cl); |
3766 | 2597 heap_region_iterate(&blk); |
342 | 2598 } |
2599 | |
2600 void G1CollectedHeap::object_iterate_since_last_GC(ObjectClosure* cl) { | |
2601 // FIXME: is this right? | |
2602 guarantee(false, "object_iterate_since_last_GC not supported by G1 heap"); | |
2603 } | |
2604 | |
2605 // Calls a SpaceClosure on a HeapRegion. | |
2606 | |
2607 class SpaceClosureRegionClosure: public HeapRegionClosure { | |
2608 SpaceClosure* _cl; | |
2609 public: | |
2610 SpaceClosureRegionClosure(SpaceClosure* cl) : _cl(cl) {} | |
2611 bool doHeapRegion(HeapRegion* r) { | |
2612 _cl->do_space(r); | |
2613 return false; | |
2614 } | |
2615 }; | |
2616 | |
2617 void G1CollectedHeap::space_iterate(SpaceClosure* cl) { | |
2618 SpaceClosureRegionClosure blk(cl); | |
3766 | 2619 heap_region_iterate(&blk); |
342 | 2620 } |
2621 | |
3766 | 2622 void G1CollectedHeap::heap_region_iterate(HeapRegionClosure* cl) const { |
2623 _hrs.iterate(cl); | |
342 | 2624 } |
2625 | |
2626 void | |
2627 G1CollectedHeap::heap_region_par_iterate_chunked(HeapRegionClosure* cl, | |
6254
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2628 uint worker_id, |
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
2629 uint no_of_par_workers, |
342 | 2630 jint claim_value) { |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
2631 const uint regions = n_regions(); |
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
2632 const uint max_workers = (G1CollectedHeap::use_parallel_gc_threads() ? |
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
2633 no_of_par_workers : |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
2634 1); |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
2635 assert(UseDynamicNumberOfGCThreads || |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
2636 no_of_par_workers == workers()->total_workers(), |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
2637 "Non dynamic should use fixed number of workers"); |
355 | 2638 // try to spread out the starting points of the workers |
6254
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2639 const HeapRegion* start_hr = |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2640 start_region_for_worker(worker_id, no_of_par_workers); |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2641 const uint start_index = start_hr->hrs_index(); |
355 | 2642 |
2643 // each worker will actually look at all regions | |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
2644 for (uint count = 0; count < regions; ++count) { |
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
2645 const uint index = (start_index + count) % regions; |
355 | 2646 assert(0 <= index && index < regions, "sanity"); |
2647 HeapRegion* r = region_at(index); | |
2648 // we'll ignore "continues humongous" regions (we'll process them | |
2649 // when we come across their corresponding "start humongous" | |
2650 // region) and regions already claimed | |
2651 if (r->claim_value() == claim_value || r->continuesHumongous()) { | |
2652 continue; | |
2653 } | |
2654 // OK, try to claim it | |
342 | 2655 if (r->claimHeapRegion(claim_value)) { |
355 | 2656 // success! |
2657 assert(!r->continuesHumongous(), "sanity"); | |
2658 if (r->startsHumongous()) { | |
2659 // If the region is "starts humongous" we'll iterate over its | |
2660 // "continues humongous" first; in fact we'll do them | |
2661 // first. The order is important. In on case, calling the | |
2662 // closure on the "starts humongous" region might de-allocate | |
2663 // and clear all its "continues humongous" regions and, as a | |
2664 // result, we might end up processing them twice. So, we'll do | |
2665 // them first (notice: most closures will ignore them anyway) and | |
2666 // then we'll do the "starts humongous" region. | |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
2667 for (uint ch_index = index + 1; ch_index < regions; ++ch_index) { |
355 | 2668 HeapRegion* chr = region_at(ch_index); |
2669 | |
2670 // if the region has already been claimed or it's not | |
2671 // "continues humongous" we're done | |
2672 if (chr->claim_value() == claim_value || | |
2673 !chr->continuesHumongous()) { | |
2674 break; | |
2675 } | |
2676 | |
2677 // Noone should have claimed it directly. We can given | |
2678 // that we claimed its "starts humongous" region. | |
2679 assert(chr->claim_value() != claim_value, "sanity"); | |
2680 assert(chr->humongous_start_region() == r, "sanity"); | |
2681 | |
2682 if (chr->claimHeapRegion(claim_value)) { | |
2683 // we should always be able to claim it; noone else should | |
2684 // be trying to claim this region | |
2685 | |
2686 bool res2 = cl->doHeapRegion(chr); | |
2687 assert(!res2, "Should not abort"); | |
2688 | |
2689 // Right now, this holds (i.e., no closure that actually | |
2690 // does something with "continues humongous" regions | |
2691 // clears them). We might have to weaken it in the future, | |
2692 // but let's leave these two asserts here for extra safety. | |
2693 assert(chr->continuesHumongous(), "should still be the case"); | |
2694 assert(chr->humongous_start_region() == r, "sanity"); | |
2695 } else { | |
2696 guarantee(false, "we should not reach here"); | |
2697 } | |
2698 } | |
2699 } | |
2700 | |
2701 assert(!r->continuesHumongous(), "sanity"); | |
2702 bool res = cl->doHeapRegion(r); | |
2703 assert(!res, "Should not abort"); | |
2704 } | |
2705 } | |
2706 } | |
2707 | |
390 | 2708 class ResetClaimValuesClosure: public HeapRegionClosure { |
2709 public: | |
2710 bool doHeapRegion(HeapRegion* r) { | |
2711 r->set_claim_value(HeapRegion::InitialClaimValue); | |
2712 return false; | |
2713 } | |
2714 }; | |
2715 | |
4783
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
2716 void G1CollectedHeap::reset_heap_region_claim_values() { |
390 | 2717 ResetClaimValuesClosure blk; |
2718 heap_region_iterate(&blk); | |
2719 } | |
2720 | |
4783
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
2721 void G1CollectedHeap::reset_cset_heap_region_claim_values() { |
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
2722 ResetClaimValuesClosure blk; |
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
2723 collection_set_iterate(&blk); |
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
2724 } |
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
2725 |
355 | 2726 #ifdef ASSERT |
2727 // This checks whether all regions in the heap have the correct claim | |
2728 // value. I also piggy-backed on this a check to ensure that the | |
2729 // humongous_start_region() information on "continues humongous" | |
2730 // regions is correct. | |
2731 | |
2732 class CheckClaimValuesClosure : public HeapRegionClosure { | |
2733 private: | |
2734 jint _claim_value; | |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
2735 uint _failures; |
355 | 2736 HeapRegion* _sh_region; |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
2737 |
355 | 2738 public: |
2739 CheckClaimValuesClosure(jint claim_value) : | |
2740 _claim_value(claim_value), _failures(0), _sh_region(NULL) { } | |
2741 bool doHeapRegion(HeapRegion* r) { | |
2742 if (r->claim_value() != _claim_value) { | |
4097
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2743 gclog_or_tty->print_cr("Region " HR_FORMAT ", " |
355 | 2744 "claim value = %d, should be %d", |
4097
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2745 HR_FORMAT_PARAMS(r), |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2746 r->claim_value(), _claim_value); |
355 | 2747 ++_failures; |
2748 } | |
2749 if (!r->isHumongous()) { | |
2750 _sh_region = NULL; | |
2751 } else if (r->startsHumongous()) { | |
2752 _sh_region = r; | |
2753 } else if (r->continuesHumongous()) { | |
2754 if (r->humongous_start_region() != _sh_region) { | |
4097
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2755 gclog_or_tty->print_cr("Region " HR_FORMAT ", " |
355 | 2756 "HS = "PTR_FORMAT", should be "PTR_FORMAT, |
4097
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2757 HR_FORMAT_PARAMS(r), |
355 | 2758 r->humongous_start_region(), |
2759 _sh_region); | |
2760 ++_failures; | |
342 | 2761 } |
2762 } | |
355 | 2763 return false; |
2764 } | |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
2765 uint failures() { return _failures; } |
355 | 2766 }; |
2767 | |
2768 bool G1CollectedHeap::check_heap_region_claim_values(jint claim_value) { | |
2769 CheckClaimValuesClosure cl(claim_value); | |
2770 heap_region_iterate(&cl); | |
2771 return cl.failures() == 0; | |
2772 } | |
4097
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2773 |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2774 class CheckClaimValuesInCSetHRClosure: public HeapRegionClosure { |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
2775 private: |
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
2776 jint _claim_value; |
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
2777 uint _failures; |
4097
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2778 |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2779 public: |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2780 CheckClaimValuesInCSetHRClosure(jint claim_value) : |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
2781 _claim_value(claim_value), _failures(0) { } |
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
2782 |
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
2783 uint failures() { return _failures; } |
4097
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2784 |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2785 bool doHeapRegion(HeapRegion* hr) { |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2786 assert(hr->in_collection_set(), "how?"); |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2787 assert(!hr->isHumongous(), "H-region in CSet"); |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2788 if (hr->claim_value() != _claim_value) { |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2789 gclog_or_tty->print_cr("CSet Region " HR_FORMAT ", " |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2790 "claim value = %d, should be %d", |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2791 HR_FORMAT_PARAMS(hr), |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2792 hr->claim_value(), _claim_value); |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2793 _failures += 1; |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2794 } |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2795 return false; |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2796 } |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2797 }; |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2798 |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2799 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
|
2800 CheckClaimValuesInCSetHRClosure cl(claim_value); |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2801 collection_set_iterate(&cl); |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2802 return cl.failures() == 0; |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2803 } |
355 | 2804 #endif // ASSERT |
342 | 2805 |
4709
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2806 // 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
|
2807 // 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
|
2808 void G1CollectedHeap::clear_cset_start_regions() { |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2809 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
|
2810 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
|
2811 |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2812 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
|
2813 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
|
2814 _worker_cset_start_region[i] = NULL; |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2815 _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
|
2816 } |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2817 } |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2818 |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2819 // 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
|
2820 // starting region for iterating over the current collection set. |
4097
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2821 HeapRegion* G1CollectedHeap::start_cset_region_for_worker(int worker_i) { |
4709
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2822 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
|
2823 |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2824 HeapRegion* result = NULL; |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2825 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
|
2826 |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2827 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
|
2828 // 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
|
2829 // 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
|
2830 // 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
|
2831 // (when the collection set is empty). |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2832 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
|
2833 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
|
2834 return result; |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2835 } |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2836 |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2837 // 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
|
2838 // 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
|
2839 |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2840 // 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
|
2841 // 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
|
2842 // avoid contention. |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2843 // If we have: |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2844 // n collection set regions |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2845 // p threads |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2846 // 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
|
2847 |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2848 result = g1_policy()->collection_set(); |
4097
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2849 if (G1CollectedHeap::use_parallel_gc_threads()) { |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
2850 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
|
2851 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
|
2852 assert(UseDynamicNumberOfGCThreads || |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2853 active_workers == workers()->total_workers(), |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2854 "Unless dynamic should use total workers"); |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2855 |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
2856 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
|
2857 uint start_ind = 0; |
4709
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2858 |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2859 if (worker_i > 0 && |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2860 _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
|
2861 // Previous workers starting region is valid |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2862 // so let's iterate from there |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2863 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
|
2864 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
|
2865 } |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2866 |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
2867 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
|
2868 result = result->next_in_collection_set(); |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2869 } |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2870 } |
4709
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2871 |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2872 // 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
|
2873 // (when the collection set is empty). |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2874 assert(result == NULL || result->in_collection_set(), "sanity"); |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2875 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
|
2876 "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
|
2877 _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
|
2878 OrderAccess::storestore(); |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2879 _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
|
2880 return result; |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2881 } |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2882 |
6254
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2883 HeapRegion* G1CollectedHeap::start_region_for_worker(uint worker_i, |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2884 uint no_of_par_workers) { |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2885 uint worker_num = |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2886 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
|
2887 assert(UseDynamicNumberOfGCThreads || |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2888 no_of_par_workers == workers()->total_workers(), |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2889 "Non dynamic should use fixed number of workers"); |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2890 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
|
2891 return region_at(start_index); |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2892 } |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2893 |
342 | 2894 void G1CollectedHeap::collection_set_iterate(HeapRegionClosure* cl) { |
2895 HeapRegion* r = g1_policy()->collection_set(); | |
2896 while (r != NULL) { | |
2897 HeapRegion* next = r->next_in_collection_set(); | |
2898 if (cl->doHeapRegion(r)) { | |
2899 cl->incomplete(); | |
2900 return; | |
2901 } | |
2902 r = next; | |
2903 } | |
2904 } | |
2905 | |
2906 void G1CollectedHeap::collection_set_iterate_from(HeapRegion* r, | |
2907 HeapRegionClosure *cl) { | |
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2908 if (r == NULL) { |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2909 // 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
|
2910 return; |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2911 } |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2912 |
342 | 2913 assert(r->in_collection_set(), |
2914 "Start region must be a member of the collection set."); | |
2915 HeapRegion* cur = r; | |
2916 while (cur != NULL) { | |
2917 HeapRegion* next = cur->next_in_collection_set(); | |
2918 if (cl->doHeapRegion(cur) && false) { | |
2919 cl->incomplete(); | |
2920 return; | |
2921 } | |
2922 cur = next; | |
2923 } | |
2924 cur = g1_policy()->collection_set(); | |
2925 while (cur != r) { | |
2926 HeapRegion* next = cur->next_in_collection_set(); | |
2927 if (cl->doHeapRegion(cur) && false) { | |
2928 cl->incomplete(); | |
2929 return; | |
2930 } | |
2931 cur = next; | |
2932 } | |
2933 } | |
2934 | |
2935 CompactibleSpace* G1CollectedHeap::first_compactible_space() { | |
3766 | 2936 return n_regions() > 0 ? region_at(0) : NULL; |
342 | 2937 } |
2938 | |
2939 | |
2940 Space* G1CollectedHeap::space_containing(const void* addr) const { | |
2941 Space* res = heap_region_containing(addr); | |
2942 return res; | |
2943 } | |
2944 | |
2945 HeapWord* G1CollectedHeap::block_start(const void* addr) const { | |
2946 Space* sp = space_containing(addr); | |
2947 if (sp != NULL) { | |
2948 return sp->block_start(addr); | |
2949 } | |
2950 return NULL; | |
2951 } | |
2952 | |
2953 size_t G1CollectedHeap::block_size(const HeapWord* addr) const { | |
2954 Space* sp = space_containing(addr); | |
2955 assert(sp != NULL, "block_size of address outside of heap"); | |
2956 return sp->block_size(addr); | |
2957 } | |
2958 | |
2959 bool G1CollectedHeap::block_is_obj(const HeapWord* addr) const { | |
2960 Space* sp = space_containing(addr); | |
2961 return sp->block_is_obj(addr); | |
2962 } | |
2963 | |
2964 bool G1CollectedHeap::supports_tlab_allocation() const { | |
2965 return true; | |
2966 } | |
2967 | |
2968 size_t G1CollectedHeap::tlab_capacity(Thread* ignored) const { | |
2969 return HeapRegion::GrainBytes; | |
2970 } | |
2971 | |
2972 size_t G1CollectedHeap::unsafe_max_tlab_alloc(Thread* ignored) const { | |
2973 // Return the remaining space in the cur alloc region, but not less than | |
2974 // the min TLAB size. | |
1313
664ae0c5e0e5
6755988: G1: assert(new_obj != 0 || ... "should be forwarded")
johnc
parents:
1282
diff
changeset
|
2975 |
664ae0c5e0e5
6755988: G1: assert(new_obj != 0 || ... "should be forwarded")
johnc
parents:
1282
diff
changeset
|
2976 // Also, this value can be at most the humongous object threshold, |
664ae0c5e0e5
6755988: G1: assert(new_obj != 0 || ... "should be forwarded")
johnc
parents:
1282
diff
changeset
|
2977 // since we can't allow tlabs to grow big enough to accomodate |
664ae0c5e0e5
6755988: G1: assert(new_obj != 0 || ... "should be forwarded")
johnc
parents:
1282
diff
changeset
|
2978 // humongous objects. |
664ae0c5e0e5
6755988: G1: assert(new_obj != 0 || ... "should be forwarded")
johnc
parents:
1282
diff
changeset
|
2979 |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2980 HeapRegion* hr = _mutator_alloc_region.get(); |
1313
664ae0c5e0e5
6755988: G1: assert(new_obj != 0 || ... "should be forwarded")
johnc
parents:
1282
diff
changeset
|
2981 size_t max_tlab_size = _humongous_object_threshold_in_words * wordSize; |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2982 if (hr == NULL) { |
1313
664ae0c5e0e5
6755988: G1: assert(new_obj != 0 || ... "should be forwarded")
johnc
parents:
1282
diff
changeset
|
2983 return max_tlab_size; |
342 | 2984 } else { |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2985 return MIN2(MAX2(hr->free(), (size_t) MinTLABSize), max_tlab_size); |
342 | 2986 } |
2987 } | |
2988 | |
2989 size_t G1CollectedHeap::max_capacity() const { | |
2188
c33825b68624
6923430: G1: assert(res != 0,"This should have worked.")
johnc
parents:
2173
diff
changeset
|
2990 return _g1_reserved.byte_size(); |
342 | 2991 } |
2992 | |
2993 jlong G1CollectedHeap::millis_since_last_gc() { | |
2994 // assert(false, "NYI"); | |
2995 return 0; | |
2996 } | |
2997 | |
2998 void G1CollectedHeap::prepare_for_verify() { | |
2999 if (SafepointSynchronize::is_at_safepoint() || ! UseTLAB) { | |
3000 ensure_parsability(false); | |
3001 } | |
3002 g1_rem_set()->prepare_for_verify(); | |
3003 } | |
3004 | |
6254
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3005 bool G1CollectedHeap::allocated_since_marking(oop obj, HeapRegion* hr, |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3006 VerifyOption vo) { |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3007 switch (vo) { |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3008 case VerifyOption_G1UsePrevMarking: |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3009 return hr->obj_allocated_since_prev_marking(obj); |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3010 case VerifyOption_G1UseNextMarking: |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3011 return hr->obj_allocated_since_next_marking(obj); |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3012 case VerifyOption_G1UseMarkWord: |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3013 return false; |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3014 default: |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3015 ShouldNotReachHere(); |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3016 } |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3017 return false; // keep some compilers happy |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3018 } |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3019 |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3020 HeapWord* G1CollectedHeap::top_at_mark_start(HeapRegion* hr, VerifyOption vo) { |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3021 switch (vo) { |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3022 case VerifyOption_G1UsePrevMarking: return hr->prev_top_at_mark_start(); |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3023 case VerifyOption_G1UseNextMarking: return hr->next_top_at_mark_start(); |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3024 case VerifyOption_G1UseMarkWord: return NULL; |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3025 default: ShouldNotReachHere(); |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3026 } |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3027 return NULL; // keep some compilers happy |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3028 } |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3029 |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3030 bool G1CollectedHeap::is_marked(oop obj, VerifyOption vo) { |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3031 switch (vo) { |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3032 case VerifyOption_G1UsePrevMarking: return isMarkedPrev(obj); |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3033 case VerifyOption_G1UseNextMarking: return isMarkedNext(obj); |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3034 case VerifyOption_G1UseMarkWord: return obj->is_gc_marked(); |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3035 default: ShouldNotReachHere(); |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3036 } |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3037 return false; // keep some compilers happy |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3038 } |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3039 |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3040 const char* G1CollectedHeap::top_at_mark_start_str(VerifyOption vo) { |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3041 switch (vo) { |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3042 case VerifyOption_G1UsePrevMarking: return "PTAMS"; |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3043 case VerifyOption_G1UseNextMarking: return "NTAMS"; |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3044 case VerifyOption_G1UseMarkWord: return "NONE"; |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3045 default: ShouldNotReachHere(); |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3046 } |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3047 return NULL; // keep some compilers happy |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3048 } |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3049 |
342 | 3050 class VerifyLivenessOopClosure: public OopClosure { |
3772
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
3051 G1CollectedHeap* _g1h; |
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
3052 VerifyOption _vo; |
342 | 3053 public: |
3772
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
3054 VerifyLivenessOopClosure(G1CollectedHeap* g1h, VerifyOption vo): |
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
3055 _g1h(g1h), _vo(vo) |
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
3056 { } |
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3057 void do_oop(narrowOop *p) { do_oop_work(p); } |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3058 void do_oop( oop *p) { do_oop_work(p); } |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3059 |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3060 template <class T> void do_oop_work(T *p) { |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3061 oop obj = oopDesc::load_decode_heap_oop(p); |
3772
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
3062 guarantee(obj == NULL || !_g1h->is_obj_dead_cond(obj, _vo), |
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3063 "Dead object referenced by a not dead object"); |
342 | 3064 } |
3065 }; | |
3066 | |
3067 class VerifyObjsInRegionClosure: public ObjectClosure { | |
811 | 3068 private: |
342 | 3069 G1CollectedHeap* _g1h; |
3070 size_t _live_bytes; | |
3071 HeapRegion *_hr; | |
3772
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
3072 VerifyOption _vo; |
342 | 3073 public: |
3772
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
3074 // _vo == UsePrevMarking -> use "prev" marking information, |
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
3075 // _vo == UseNextMarking -> use "next" marking information, |
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
3076 // _vo == UseMarkWord -> use mark word from object header. |
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
3077 VerifyObjsInRegionClosure(HeapRegion *hr, VerifyOption vo) |
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
3078 : _live_bytes(0), _hr(hr), _vo(vo) { |
342 | 3079 _g1h = G1CollectedHeap::heap(); |
3080 } | |
3081 void do_object(oop o) { | |
3772
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
3082 VerifyLivenessOopClosure isLive(_g1h, _vo); |
342 | 3083 assert(o != NULL, "Huh?"); |
3772
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
3084 if (!_g1h->is_obj_dead_cond(o, _vo)) { |
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
3085 // If the object is alive according to the mark word, |
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
3086 // then verify that the marking information agrees. |
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
3087 // Note we can't verify the contra-positive of the |
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
3088 // above: if the object is dead (according to the mark |
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
3089 // word), it may not be marked, or may have been marked |
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
3090 // but has since became dead, or may have been allocated |
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
3091 // since the last marking. |
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
3092 if (_vo == VerifyOption_G1UseMarkWord) { |
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
3093 guarantee(!_g1h->is_obj_dead(o), "mark word and concurrent mark mismatch"); |
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
3094 } |
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
3095 |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
3096 o->oop_iterate_no_header(&isLive); |
1389
5dbd9300cf9c
6943926: G1: Integer overflow during heap region verification
johnc
parents:
1388
diff
changeset
|
3097 if (!_hr->obj_allocated_since_prev_marking(o)) { |
5dbd9300cf9c
6943926: G1: Integer overflow during heap region verification
johnc
parents:
1388
diff
changeset
|
3098 size_t obj_size = o->size(); // Make sure we don't overflow |
5dbd9300cf9c
6943926: G1: Integer overflow during heap region verification
johnc
parents:
1388
diff
changeset
|
3099 _live_bytes += (obj_size * HeapWordSize); |
5dbd9300cf9c
6943926: G1: Integer overflow during heap region verification
johnc
parents:
1388
diff
changeset
|
3100 } |
342 | 3101 } |
3102 } | |
3103 size_t live_bytes() { return _live_bytes; } | |
3104 }; | |
3105 | |
3106 class PrintObjsInRegionClosure : public ObjectClosure { | |
3107 HeapRegion *_hr; | |
3108 G1CollectedHeap *_g1; | |
3109 public: | |
3110 PrintObjsInRegionClosure(HeapRegion *hr) : _hr(hr) { | |
3111 _g1 = G1CollectedHeap::heap(); | |
3112 }; | |
3113 | |
3114 void do_object(oop o) { | |
3115 if (o != NULL) { | |
3116 HeapWord *start = (HeapWord *) o; | |
3117 size_t word_sz = o->size(); | |
3118 gclog_or_tty->print("\nPrinting obj "PTR_FORMAT" of size " SIZE_FORMAT | |
3119 " isMarkedPrev %d isMarkedNext %d isAllocSince %d\n", | |
3120 (void*) o, word_sz, | |
3121 _g1->isMarkedPrev(o), | |
3122 _g1->isMarkedNext(o), | |
3123 _hr->obj_allocated_since_prev_marking(o)); | |
3124 HeapWord *end = start + word_sz; | |
3125 HeapWord *cur; | |
3126 int *val; | |
3127 for (cur = start; cur < end; cur++) { | |
3128 val = (int *) cur; | |
3129 gclog_or_tty->print("\t "PTR_FORMAT":"PTR_FORMAT"\n", val, *val); | |
3130 } | |
3131 } | |
3132 } | |
3133 }; | |
3134 | |
3135 class VerifyRegionClosure: public HeapRegionClosure { | |
811 | 3136 private: |
6254
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3137 bool _par; |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3138 VerifyOption _vo; |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3139 bool _failures; |
811 | 3140 public: |
3772
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
3141 // _vo == UsePrevMarking -> use "prev" marking information, |
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
3142 // _vo == UseNextMarking -> use "next" marking information, |
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
3143 // _vo == UseMarkWord -> use mark word from object header. |
6008 | 3144 VerifyRegionClosure(bool par, VerifyOption vo) |
3145 : _par(par), | |
3772
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
3146 _vo(vo), |
1020
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
3147 _failures(false) {} |
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
3148 |
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
3149 bool failures() { |
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
3150 return _failures; |
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
3151 } |
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3152 |
342 | 3153 bool doHeapRegion(HeapRegion* r) { |
637
25e146966e7c
6817419: G1: Enable extensive verification for humongous regions
iveresov
parents:
636
diff
changeset
|
3154 if (!r->continuesHumongous()) { |
1020
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
3155 bool failures = false; |
6008 | 3156 r->verify(_vo, &failures); |
1020
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
3157 if (failures) { |
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
3158 _failures = true; |
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
3159 } else { |
3772
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
3160 VerifyObjsInRegionClosure not_dead_yet_cl(r, _vo); |
1020
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
3161 r->object_iterate(¬_dead_yet_cl); |
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
3162 if (_vo != VerifyOption_G1UseNextMarking) { |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
3163 if (r->max_live_bytes() < not_dead_yet_cl.live_bytes()) { |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
3164 gclog_or_tty->print_cr("["PTR_FORMAT","PTR_FORMAT"] " |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
3165 "max_live_bytes "SIZE_FORMAT" " |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
3166 "< calculated "SIZE_FORMAT, |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
3167 r->bottom(), r->end(), |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
3168 r->max_live_bytes(), |
1020
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
3169 not_dead_yet_cl.live_bytes()); |
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
3170 _failures = true; |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
3171 } |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
3172 } else { |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
3173 // When vo == UseNextMarking we cannot currently do a sanity |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
3174 // check on the live bytes as the calculation has not been |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
3175 // finalized yet. |
1020
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
3176 } |
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
3177 } |
342 | 3178 } |
1020
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
3179 return false; // stop the region iteration if we hit a failure |
342 | 3180 } |
3181 }; | |
3182 | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
3183 class YoungRefCounterClosure : public OopClosure { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
3184 G1CollectedHeap* _g1h; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
3185 int _count; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
3186 public: |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
3187 YoungRefCounterClosure(G1CollectedHeap* g1h) : _g1h(g1h), _count(0) {} |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
3188 void do_oop(oop* p) { if (_g1h->is_in_young(*p)) { _count++; } } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
3189 void do_oop(narrowOop* p) { ShouldNotReachHere(); } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
3190 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
3191 int count() { return _count; } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
3192 void reset_count() { _count = 0; }; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
3193 }; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
3194 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
3195 class VerifyKlassClosure: public KlassClosure { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
3196 YoungRefCounterClosure _young_ref_counter_closure; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
3197 OopClosure *_oop_closure; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
3198 public: |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
3199 VerifyKlassClosure(G1CollectedHeap* g1h, OopClosure* cl) : _young_ref_counter_closure(g1h), _oop_closure(cl) {} |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
3200 void do_klass(Klass* k) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
3201 k->oops_do(_oop_closure); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
3202 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
3203 _young_ref_counter_closure.reset_count(); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
3204 k->oops_do(&_young_ref_counter_closure); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
3205 if (_young_ref_counter_closure.count() > 0) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
3206 guarantee(k->has_modified_oops(), err_msg("Klass %p, has young refs but is not dirty.", k)); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
3207 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
3208 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
3209 }; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
3210 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
3211 // TODO: VerifyRootsClosure extends OopsInGenClosure so that we can |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
3212 // pass it as the perm_blk to SharedHeap::process_strong_roots. |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
3213 // When process_strong_roots stop calling perm_blk->younger_refs_iterate |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
3214 // we can change this closure to extend the simpler OopClosure. |
342 | 3215 class VerifyRootsClosure: public OopsInGenClosure { |
3216 private: | |
3217 G1CollectedHeap* _g1h; | |
3772
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
3218 VerifyOption _vo; |
342 | 3219 bool _failures; |
3220 public: | |
3772
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
3221 // _vo == UsePrevMarking -> use "prev" marking information, |
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
3222 // _vo == UseNextMarking -> use "next" marking information, |
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
3223 // _vo == UseMarkWord -> use mark word from object header. |
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
3224 VerifyRootsClosure(VerifyOption vo) : |
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3225 _g1h(G1CollectedHeap::heap()), |
3772
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
3226 _vo(vo), |
1020
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
3227 _failures(false) { } |
342 | 3228 |
3229 bool failures() { return _failures; } | |
3230 | |
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3231 template <class T> void do_oop_nv(T* p) { |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3232 T heap_oop = oopDesc::load_heap_oop(p); |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3233 if (!oopDesc::is_null(heap_oop)) { |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3234 oop obj = oopDesc::decode_heap_oop_not_null(heap_oop); |
3772
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
3235 if (_g1h->is_obj_dead_cond(obj, _vo)) { |
342 | 3236 gclog_or_tty->print_cr("Root location "PTR_FORMAT" " |
1020
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
3237 "points to dead obj "PTR_FORMAT, p, (void*) obj); |
3772
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
3238 if (_vo == VerifyOption_G1UseMarkWord) { |
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
3239 gclog_or_tty->print_cr(" Mark word: "PTR_FORMAT, (void*)(obj->mark())); |
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
3240 } |
342 | 3241 obj->print_on(gclog_or_tty); |
3242 _failures = true; | |
3243 } | |
3244 } | |
3245 } | |
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3246 |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3247 void do_oop(oop* p) { do_oop_nv(p); } |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3248 void do_oop(narrowOop* p) { do_oop_nv(p); } |
342 | 3249 }; |
3250 | |
390 | 3251 // This is the task used for parallel heap verification. |
3252 | |
3253 class G1ParVerifyTask: public AbstractGangTask { | |
3254 private: | |
3255 G1CollectedHeap* _g1h; | |
3772
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
3256 VerifyOption _vo; |
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
3257 bool _failures; |
390 | 3258 |
3259 public: | |
3772
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
3260 // _vo == UsePrevMarking -> use "prev" marking information, |
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
3261 // _vo == UseNextMarking -> use "next" marking information, |
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
3262 // _vo == UseMarkWord -> use mark word from object header. |
6008 | 3263 G1ParVerifyTask(G1CollectedHeap* g1h, VerifyOption vo) : |
390 | 3264 AbstractGangTask("Parallel verify task"), |
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3265 _g1h(g1h), |
3772
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
3266 _vo(vo), |
1020
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
3267 _failures(false) { } |
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
3268 |
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
3269 bool failures() { |
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
3270 return _failures; |
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
3271 } |
390 | 3272 |
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
3273 void work(uint worker_id) { |
637
25e146966e7c
6817419: G1: Enable extensive verification for humongous regions
iveresov
parents:
636
diff
changeset
|
3274 HandleMark hm; |
6008 | 3275 VerifyRegionClosure blk(true, _vo); |
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
3276 _g1h->heap_region_par_iterate_chunked(&blk, worker_id, |
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
3277 _g1h->workers()->active_workers(), |
390 | 3278 HeapRegion::ParVerifyClaimValue); |
1020
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
3279 if (blk.failures()) { |
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
3280 _failures = true; |
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
3281 } |
390 | 3282 } |
3283 }; | |
3284 | |
6008 | 3285 void G1CollectedHeap::verify(bool silent) { |
3286 verify(silent, VerifyOption_G1UsePrevMarking); | |
3287 } | |
3288 | |
3289 void G1CollectedHeap::verify(bool silent, | |
3772
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
3290 VerifyOption vo) { |
342 | 3291 if (SafepointSynchronize::is_at_safepoint() || ! UseTLAB) { |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
3292 if (!silent) { gclog_or_tty->print("Roots "); } |
3772
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
3293 VerifyRootsClosure rootsCl(vo); |
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
3294 |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
3295 assert(Thread::current()->is_VM_thread(), |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
3296 "Expected to be executed serially by the VM thread at this point"); |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
3297 |
989
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
890
diff
changeset
|
3298 CodeBlobToOopClosure blobsCl(&rootsCl, /*do_marking=*/ false); |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
3299 VerifyKlassClosure klassCl(this, &rootsCl); |
3772
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
3300 |
3293
1f4413413144
7039089: G1: changeset for 7037276 broke heap verification, and related cleanups
ysr
parents:
3289
diff
changeset
|
3301 // We apply the relevant closures to all the oops in the |
1f4413413144
7039089: G1: changeset for 7037276 broke heap verification, and related cleanups
ysr
parents:
3289
diff
changeset
|
3302 // system dictionary, the string table and the code cache. |
4910
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
3303 const int so = SO_AllClasses | SO_Strings | SO_CodeCache; |
3772
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
3304 |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
3305 // Need cleared claim bits for the strong roots processing |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
3306 ClassLoaderDataGraph::clear_claimed_marks(); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
3307 |
3293
1f4413413144
7039089: G1: changeset for 7037276 broke heap verification, and related cleanups
ysr
parents:
3289
diff
changeset
|
3308 process_strong_roots(true, // activate StrongRootsScope |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
3309 false, // we set "is scavenging" to false, |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
3310 // so we don't reset the dirty cards. |
4910
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
3311 ScanningOption(so), // roots scanning options |
342 | 3312 &rootsCl, |
989
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
890
diff
changeset
|
3313 &blobsCl, |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
3314 &klassCl |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
3315 ); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
3316 |
1020
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
3317 bool failures = rootsCl.failures(); |
3772
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
3318 |
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
3319 if (vo != VerifyOption_G1UseMarkWord) { |
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
3320 // If we're verifying during a full GC then the region sets |
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
3321 // will have been torn down at the start of the GC. Therefore |
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
3322 // verifying the region sets will fail. So we only verify |
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
3323 // the region sets when not in a full GC. |
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
3324 if (!silent) { gclog_or_tty->print("HeapRegionSets "); } |
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
3325 verify_region_sets(); |
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
3326 } |
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
3327 |
2152 | 3328 if (!silent) { gclog_or_tty->print("HeapRegions "); } |
390 | 3329 if (GCParallelVerificationEnabled && ParallelGCThreads > 1) { |
3330 assert(check_heap_region_claim_values(HeapRegion::InitialClaimValue), | |
3331 "sanity check"); | |
3332 | |
6008 | 3333 G1ParVerifyTask task(this, vo); |
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
3334 assert(UseDynamicNumberOfGCThreads || |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
3335 workers()->active_workers() == workers()->total_workers(), |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
3336 "If not dynamic should be using all the workers"); |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
3337 int n_workers = workers()->active_workers(); |
390 | 3338 set_par_threads(n_workers); |
3339 workers()->run_task(&task); | |
3340 set_par_threads(0); | |
1020
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
3341 if (task.failures()) { |
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
3342 failures = true; |
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
3343 } |
390 | 3344 |
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
3345 // Checks that the expected amount of parallel work was done. |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
3346 // The implication is that n_workers is > 0. |
390 | 3347 assert(check_heap_region_claim_values(HeapRegion::ParVerifyClaimValue), |
3348 "sanity check"); | |
3349 | |
3350 reset_heap_region_claim_values(); | |
3351 | |
3352 assert(check_heap_region_claim_values(HeapRegion::InitialClaimValue), | |
3353 "sanity check"); | |
3354 } else { | |
6008 | 3355 VerifyRegionClosure blk(false, vo); |
3766 | 3356 heap_region_iterate(&blk); |
1020
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
3357 if (blk.failures()) { |
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
3358 failures = true; |
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
3359 } |
390 | 3360 } |
2152 | 3361 if (!silent) gclog_or_tty->print("RemSet "); |
342 | 3362 rem_set()->verify(); |
1020
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
3363 |
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
3364 if (failures) { |
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
3365 gclog_or_tty->print_cr("Heap:"); |
4073
53074c2c4600
7099849: G1: include heap region information in hs_err files
tonyp
parents:
4072
diff
changeset
|
3366 // It helps to have the per-region information in the output to |
53074c2c4600
7099849: G1: include heap region information in hs_err files
tonyp
parents:
4072
diff
changeset
|
3367 // help us track down what went wrong. This is why we call |
53074c2c4600
7099849: G1: include heap region information in hs_err files
tonyp
parents:
4072
diff
changeset
|
3368 // print_extended_on() instead of print_on(). |
53074c2c4600
7099849: G1: include heap region information in hs_err files
tonyp
parents:
4072
diff
changeset
|
3369 print_extended_on(gclog_or_tty); |
1020
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
3370 gclog_or_tty->print_cr(""); |
1547
fb1a39993f69
6951319: enable solaris builds using Sun Studio 12 update 1
jcoomes
parents:
1545
diff
changeset
|
3371 #ifndef PRODUCT |
1044 | 3372 if (VerifyDuringGC && G1VerifyDuringGCPrintReachable) { |
1388 | 3373 concurrent_mark()->print_reachable("at-verification-failure", |
3772
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
3374 vo, false /* all */); |
1020
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
3375 } |
1547
fb1a39993f69
6951319: enable solaris builds using Sun Studio 12 update 1
jcoomes
parents:
1545
diff
changeset
|
3376 #endif |
1020
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
3377 gclog_or_tty->flush(); |
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
3378 } |
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
3379 guarantee(!failures, "there should not have been any failures"); |
342 | 3380 } else { |
3381 if (!silent) gclog_or_tty->print("(SKIPPING roots, heapRegions, remset) "); | |
3382 } | |
3383 } | |
3384 | |
3385 class PrintRegionClosure: public HeapRegionClosure { | |
3386 outputStream* _st; | |
3387 public: | |
3388 PrintRegionClosure(outputStream* st) : _st(st) {} | |
3389 bool doHeapRegion(HeapRegion* r) { | |
3390 r->print_on(_st); | |
3391 return false; | |
3392 } | |
3393 }; | |
3394 | |
3395 void G1CollectedHeap::print_on(outputStream* st) const { | |
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3396 st->print(" %-20s", "garbage-first heap"); |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3397 st->print(" total " SIZE_FORMAT "K, used " SIZE_FORMAT "K", |
846
42d84bbbecf4
6859911: G1: assert(Heap_lock->owner() = NULL, "Should be owned on this thread's behalf")
tonyp
parents:
845
diff
changeset
|
3398 capacity()/K, used_unlocked()/K); |
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3399 st->print(" [" INTPTR_FORMAT ", " INTPTR_FORMAT ", " INTPTR_FORMAT ")", |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3400 _g1_storage.low_boundary(), |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3401 _g1_storage.high(), |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3402 _g1_storage.high_boundary()); |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3403 st->cr(); |
3986
65a8ff39a6da
7095194: G1: HeapRegion::GrainBytes, GrainWords, and CardsPerRegion should be size_t
johnc
parents:
3983
diff
changeset
|
3404 st->print(" region size " SIZE_FORMAT "K, ", HeapRegion::GrainBytes / K); |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3405 uint young_regions = _young_list->length(); |
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3406 st->print("%u young (" SIZE_FORMAT "K), ", young_regions, |
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3407 (size_t) young_regions * HeapRegion::GrainBytes / K); |
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3408 uint survivor_regions = g1_policy()->recorded_survivor_regions(); |
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3409 st->print("%u survivors (" SIZE_FORMAT "K)", survivor_regions, |
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3410 (size_t) survivor_regions * HeapRegion::GrainBytes / K); |
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3411 st->cr(); |
6863
04155d9c8c76
8000358: G1: metaspace information not printed in PrintHeapAtGC output nor in hs_err file
johnc
parents:
6819
diff
changeset
|
3412 MetaspaceAux::print_on(st); |
4073
53074c2c4600
7099849: G1: include heap region information in hs_err files
tonyp
parents:
4072
diff
changeset
|
3413 } |
53074c2c4600
7099849: G1: include heap region information in hs_err files
tonyp
parents:
4072
diff
changeset
|
3414 |
53074c2c4600
7099849: G1: include heap region information in hs_err files
tonyp
parents:
4072
diff
changeset
|
3415 void G1CollectedHeap::print_extended_on(outputStream* st) const { |
53074c2c4600
7099849: G1: include heap region information in hs_err files
tonyp
parents:
4072
diff
changeset
|
3416 print_on(st); |
53074c2c4600
7099849: G1: include heap region information in hs_err files
tonyp
parents:
4072
diff
changeset
|
3417 |
53074c2c4600
7099849: G1: include heap region information in hs_err files
tonyp
parents:
4072
diff
changeset
|
3418 // Print the per-region information. |
53074c2c4600
7099849: G1: include heap region information in hs_err files
tonyp
parents:
4072
diff
changeset
|
3419 st->cr(); |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3420 st->print_cr("Heap Regions: (Y=young(eden), SU=young(survivor), " |
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3421 "HS=humongous(starts), HC=humongous(continues), " |
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3422 "CS=collection set, F=free, TS=gc time stamp, " |
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3423 "PTAMS=previous top-at-mark-start, " |
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3424 "NTAMS=next top-at-mark-start)"); |
342 | 3425 PrintRegionClosure blk(st); |
3766 | 3426 heap_region_iterate(&blk); |
342 | 3427 } |
3428 | |
3429 void G1CollectedHeap::print_gc_threads_on(outputStream* st) const { | |
1833
8b10f48633dc
6984287: Regularize how GC parallel workers are specified.
jmasa
parents:
1755
diff
changeset
|
3430 if (G1CollectedHeap::use_parallel_gc_threads()) { |
1019 | 3431 workers()->print_worker_threads_on(st); |
3432 } | |
3433 _cmThread->print_on(st); | |
342 | 3434 st->cr(); |
1019 | 3435 _cm->print_worker_threads_on(st); |
3436 _cg1r->print_worker_threads_on(st); | |
342 | 3437 } |
3438 | |
3439 void G1CollectedHeap::gc_threads_do(ThreadClosure* tc) const { | |
1833
8b10f48633dc
6984287: Regularize how GC parallel workers are specified.
jmasa
parents:
1755
diff
changeset
|
3440 if (G1CollectedHeap::use_parallel_gc_threads()) { |
342 | 3441 workers()->threads_do(tc); |
3442 } | |
3443 tc->do_thread(_cmThread); | |
794 | 3444 _cg1r->threads_do(tc); |
342 | 3445 } |
3446 | |
3447 void G1CollectedHeap::print_tracing_info() const { | |
3448 // We'll overload this to mean "trace GC pause statistics." | |
3449 if (TraceGen0Time || TraceGen1Time) { | |
3450 // The "G1CollectorPolicy" is keeping track of these stats, so delegate | |
3451 // to that. | |
3452 g1_policy()->print_tracing_info(); | |
3453 } | |
751 | 3454 if (G1SummarizeRSetStats) { |
342 | 3455 g1_rem_set()->print_summary_info(); |
3456 } | |
1282 | 3457 if (G1SummarizeConcMark) { |
342 | 3458 concurrent_mark()->print_summary_info(); |
3459 } | |
3460 g1_policy()->print_yg_surv_rate_info(); | |
3461 SpecializationStats::print(); | |
3462 } | |
3463 | |
3777
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3464 #ifndef PRODUCT |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3465 // Helpful for debugging RSet issues. |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3466 |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3467 class PrintRSetsClosure : public HeapRegionClosure { |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3468 private: |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3469 const char* _msg; |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3470 size_t _occupied_sum; |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3471 |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3472 public: |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3473 bool doHeapRegion(HeapRegion* r) { |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3474 HeapRegionRemSet* hrrs = r->rem_set(); |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3475 size_t occupied = hrrs->occupied(); |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3476 _occupied_sum += occupied; |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3477 |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3478 gclog_or_tty->print_cr("Printing RSet for region "HR_FORMAT, |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3479 HR_FORMAT_PARAMS(r)); |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3480 if (occupied == 0) { |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3481 gclog_or_tty->print_cr(" RSet is empty"); |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3482 } else { |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3483 hrrs->print(); |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3484 } |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3485 gclog_or_tty->print_cr("----------"); |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3486 return false; |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3487 } |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3488 |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3489 PrintRSetsClosure(const char* msg) : _msg(msg), _occupied_sum(0) { |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3490 gclog_or_tty->cr(); |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3491 gclog_or_tty->print_cr("========================================"); |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3492 gclog_or_tty->print_cr(msg); |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3493 gclog_or_tty->cr(); |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3494 } |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3495 |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3496 ~PrintRSetsClosure() { |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3497 gclog_or_tty->print_cr("Occupied Sum: "SIZE_FORMAT, _occupied_sum); |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3498 gclog_or_tty->print_cr("========================================"); |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3499 gclog_or_tty->cr(); |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3500 } |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3501 }; |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3502 |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3503 void G1CollectedHeap::print_cset_rsets() { |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3504 PrintRSetsClosure cl("Printing CSet RSets"); |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3505 collection_set_iterate(&cl); |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3506 } |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3507 |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3508 void G1CollectedHeap::print_all_rsets() { |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3509 PrintRSetsClosure cl("Printing All RSets");; |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3510 heap_region_iterate(&cl); |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3511 } |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3512 #endif // PRODUCT |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3513 |
342 | 3514 G1CollectedHeap* G1CollectedHeap::heap() { |
3515 assert(_sh->kind() == CollectedHeap::G1CollectedHeap, | |
3516 "not a garbage-first heap"); | |
3517 return _g1h; | |
3518 } | |
3519 | |
3520 void G1CollectedHeap::gc_prologue(bool full /* Ignored */) { | |
1245
6484c4ee11cb
6904516: More object array barrier fixes, following up on 6906727
ysr
parents:
1166
diff
changeset
|
3521 // always_do_update_barrier = false; |
342 | 3522 assert(InlineCacheBuffer::is_empty(), "should have cleaned up ICBuffer"); |
3523 // Call allocation profiler | |
3524 AllocationProfiler::iterate_since_last_gc(); | |
3525 // Fill TLAB's and such | |
3526 ensure_parsability(true); | |
3527 } | |
3528 | |
3529 void G1CollectedHeap::gc_epilogue(bool full /* Ignored */) { | |
3530 // FIXME: what is this about? | |
3531 // I'm ignoring the "fill_newgen()" call if "alloc_event_enabled" | |
3532 // is set. | |
3533 COMPILER2_PRESENT(assert(DerivedPointerTable::is_empty(), | |
3534 "derived pointer present")); | |
1245
6484c4ee11cb
6904516: More object array barrier fixes, following up on 6906727
ysr
parents:
1166
diff
changeset
|
3535 // always_do_update_barrier = true; |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3536 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3537 // We have just completed a GC. Update the soft reference |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3538 // policy with the new heap occupancy |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3539 Universe::update_heap_info_at_gc(); |
342 | 3540 } |
3541 | |
1973 | 3542 HeapWord* G1CollectedHeap::do_collection_pause(size_t word_size, |
3543 unsigned int gc_count_before, | |
3544 bool* succeeded) { | |
3545 assert_heap_not_locked_and_not_at_safepoint(); | |
342 | 3546 g1_policy()->record_stop_world_start(); |
1973 | 3547 VM_G1IncCollectionPause op(gc_count_before, |
3548 word_size, | |
3549 false, /* should_initiate_conc_mark */ | |
3550 g1_policy()->max_pause_time_ms(), | |
3551 GCCause::_g1_inc_collection_pause); | |
3552 VMThread::execute(&op); | |
3553 | |
3554 HeapWord* result = op.result(); | |
3555 bool ret_succeeded = op.prologue_succeeded() && op.pause_succeeded(); | |
3556 assert(result == NULL || ret_succeeded, | |
3557 "the result should be NULL if the VM did not succeed"); | |
3558 *succeeded = ret_succeeded; | |
3559 | |
3560 assert_heap_not_locked(); | |
3561 return result; | |
342 | 3562 } |
3563 | |
3564 void | |
3565 G1CollectedHeap::doConcurrentMark() { | |
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3566 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
|
3567 if (!_cmThread->in_progress()) { |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3568 _cmThread->set_started(); |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3569 CGC_lock->notify(); |
342 | 3570 } |
3571 } | |
3572 | |
3573 size_t G1CollectedHeap::pending_card_num() { | |
3574 size_t extra_cards = 0; | |
3575 JavaThread *curr = Threads::first(); | |
3576 while (curr != NULL) { | |
3577 DirtyCardQueue& dcq = curr->dirty_card_queue(); | |
3578 extra_cards += dcq.size(); | |
3579 curr = curr->next(); | |
3580 } | |
3581 DirtyCardQueueSet& dcqs = JavaThread::dirty_card_queue_set(); | |
3582 size_t buffer_size = dcqs.buffer_size(); | |
3583 size_t buffer_num = dcqs.completed_buffers_num(); | |
6611 | 3584 |
3585 // PtrQueueSet::buffer_size() and PtrQueue:size() return sizes | |
3586 // in bytes - not the number of 'entries'. We need to convert | |
3587 // into a number of cards. | |
3588 return (buffer_size * buffer_num + extra_cards) / oopSize; | |
342 | 3589 } |
3590 | |
3591 size_t G1CollectedHeap::cards_scanned() { | |
1861 | 3592 return g1_rem_set()->cardsScanned(); |
342 | 3593 } |
3594 | |
3595 void | |
3596 G1CollectedHeap::setup_surviving_young_words() { | |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3597 assert(_surviving_young_words == NULL, "pre-condition"); |
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3598 uint array_length = g1_policy()->young_cset_region_length(); |
6197 | 3599 _surviving_young_words = NEW_C_HEAP_ARRAY(size_t, (size_t) array_length, mtGC); |
342 | 3600 if (_surviving_young_words == NULL) { |
3601 vm_exit_out_of_memory(sizeof(size_t) * array_length, | |
3602 "Not enough space for young surv words summary."); | |
3603 } | |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3604 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
|
3605 #ifdef ASSERT |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3606 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
|
3607 assert( _surviving_young_words[i] == 0, "memset above" ); |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3608 } |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3609 #endif // !ASSERT |
342 | 3610 } |
3611 | |
3612 void | |
3613 G1CollectedHeap::update_surviving_young_words(size_t* surv_young_words) { | |
3614 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
|
3615 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
|
3616 for (uint i = 0; i < array_length; ++i) { |
342 | 3617 _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
|
3618 } |
342 | 3619 } |
3620 | |
3621 void | |
3622 G1CollectedHeap::cleanup_surviving_young_words() { | |
3623 guarantee( _surviving_young_words != NULL, "pre-condition" ); | |
6197 | 3624 FREE_C_HEAP_ARRAY(size_t, _surviving_young_words, mtGC); |
342 | 3625 _surviving_young_words = NULL; |
3626 } | |
3627 | |
3777
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3628 #ifdef ASSERT |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3629 class VerifyCSetClosure: public HeapRegionClosure { |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3630 public: |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3631 bool doHeapRegion(HeapRegion* hr) { |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3632 // 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
|
3633 // 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
|
3634 // 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
|
3635 // 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
|
3636 // 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
|
3637 // 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
|
3638 // 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
|
3639 // 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
|
3640 // evacuation failure handling. |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3641 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
|
3642 |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3643 // 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
|
3644 // perform on CSet regions. |
1261
0414c1049f15
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
1245
diff
changeset
|
3645 return false; |
0414c1049f15
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
1245
diff
changeset
|
3646 } |
0414c1049f15
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
1245
diff
changeset
|
3647 }; |
3777
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3648 #endif // ASSERT |
1261
0414c1049f15
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
1245
diff
changeset
|
3649 |
1709 | 3650 #if TASKQUEUE_STATS |
3651 void G1CollectedHeap::print_taskqueue_stats_hdr(outputStream* const st) { | |
3652 st->print_raw_cr("GC Task Stats"); | |
3653 st->print_raw("thr "); TaskQueueStats::print_header(1, st); st->cr(); | |
3654 st->print_raw("--- "); TaskQueueStats::print_header(2, st); st->cr(); | |
3655 } | |
3656 | |
3657 void G1CollectedHeap::print_taskqueue_stats(outputStream* const st) const { | |
3658 print_taskqueue_stats_hdr(st); | |
3659 | |
3660 TaskQueueStats totals; | |
1755
8e5955ddf8e4
6978300: G1: debug builds crash if ParallelGCThreads==0
jcoomes
parents:
1719
diff
changeset
|
3661 const int n = workers() != NULL ? workers()->total_workers() : 1; |
1709 | 3662 for (int i = 0; i < n; ++i) { |
3663 st->print("%3d ", i); task_queue(i)->stats.print(st); st->cr(); | |
3664 totals += task_queue(i)->stats; | |
3665 } | |
3666 st->print_raw("tot "); totals.print(st); st->cr(); | |
3667 | |
3668 DEBUG_ONLY(totals.verify()); | |
3669 } | |
3670 | |
3671 void G1CollectedHeap::reset_taskqueue_stats() { | |
1755
8e5955ddf8e4
6978300: G1: debug builds crash if ParallelGCThreads==0
jcoomes
parents:
1719
diff
changeset
|
3672 const int n = workers() != NULL ? workers()->total_workers() : 1; |
1709 | 3673 for (int i = 0; i < n; ++i) { |
3674 task_queue(i)->stats.reset(); | |
3675 } | |
3676 } | |
3677 #endif // TASKQUEUE_STATS | |
3678 | |
6752
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3679 void G1CollectedHeap::log_gc_header() { |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3680 if (!G1Log::fine()) { |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3681 return; |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3682 } |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3683 |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3684 gclog_or_tty->date_stamp(PrintGCDateStamps); |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3685 gclog_or_tty->stamp(PrintGCTimeStamps); |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3686 |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3687 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
|
3688 .append(g1_policy()->gcs_are_young() ? "(young)" : "(mixed)") |
6752
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3689 .append(g1_policy()->during_initial_mark_pause() ? " (initial-mark)" : ""); |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3690 |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3691 gclog_or_tty->print("[%s", (const char*)gc_cause_str); |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3692 } |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3693 |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3694 void G1CollectedHeap::log_gc_footer(double pause_time_sec) { |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3695 if (!G1Log::fine()) { |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3696 return; |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3697 } |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3698 |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3699 if (G1Log::finer()) { |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3700 if (evacuation_failed()) { |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3701 gclog_or_tty->print(" (to-space exhausted)"); |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3702 } |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3703 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
|
3704 g1_policy()->phase_times()->note_gc_end(); |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3705 g1_policy()->phase_times()->print(pause_time_sec); |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3706 g1_policy()->print_detailed_heap_transition(); |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3707 } else { |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3708 if (evacuation_failed()) { |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3709 gclog_or_tty->print("--"); |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3710 } |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3711 g1_policy()->print_heap_transition(); |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3712 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
|
3713 } |
7207
0f80645e9c26
8004170: G1: Verbose GC output is not getting flushed to log file using JDK 8
johnc
parents:
6863
diff
changeset
|
3714 gclog_or_tty->flush(); |
6752
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3715 } |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3716 |
1973 | 3717 bool |
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
3718 G1CollectedHeap::do_collection_pause_at_safepoint(double target_pause_time_ms) { |
2152 | 3719 assert_at_safepoint(true /* should_be_vm_thread */); |
3720 guarantee(!is_gc_active(), "collection is not reentrant"); | |
3721 | |
1359
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1313
diff
changeset
|
3722 if (GC_locker::check_active_before_gc()) { |
1973 | 3723 return false; |
1359
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1313
diff
changeset
|
3724 } |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1313
diff
changeset
|
3725 |
2125
7246a374a9f2
6458402: 3 jvmti tests fail with CMS and +ExplicitGCInvokesConcurrent
kamg
parents:
2039
diff
changeset
|
3726 SvcGCMarker sgcm(SvcGCMarker::MINOR); |
2039
7c5250dbd584
6896624: G1: hotspot:::gc and hotspot:::mem-pool-gc probes are not fired
tonyp
parents:
2038
diff
changeset
|
3727 ResourceMark rm; |
7c5250dbd584
6896624: G1: hotspot:::gc and hotspot:::mem-pool-gc probes are not fired
tonyp
parents:
2038
diff
changeset
|
3728 |
4872
aa3d708d67c4
7141200: log some interesting information in ring buffers for crashes
never
parents:
4787
diff
changeset
|
3729 print_heap_before_gc(); |
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3730 |
4072 | 3731 HRSPhaseSetter x(HRSPhaseEvacuation); |
2152 | 3732 verify_region_sets_optional(); |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
3733 verify_dirty_young_regions(); |
2152 | 3734 |
4831
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3735 // 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
|
3736 // 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
|
3737 // for the duration of this pause. |
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3738 g1_policy()->decide_on_conc_mark_initiation(); |
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3739 |
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3740 // 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
|
3741 assert(!g1_policy()->during_initial_mark_pause() || |
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3742 g1_policy()->gcs_are_young(), "sanity"); |
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3743 |
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3744 // 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
|
3745 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
|
3746 |
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3747 // 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
|
3748 // 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
|
3749 // 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
|
3750 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
|
3751 |
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3752 // 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
|
3753 { |
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
3754 if (g1_policy()->during_initial_mark_pause()) { |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
3755 // 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
|
3756 // full collection counter. |
6120
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
3757 increment_old_marking_cycles_started(); |
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
3758 } |
6007
5c86f8211d1e
7160728: Introduce an extra logging level for G1 logging
brutisso
parents:
5987
diff
changeset
|
3759 TraceCPUTime tcpu(G1Log::finer(), true, gclog_or_tty); |
6030 | 3760 |
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
3761 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
|
3762 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
|
3763 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
|
3764 g1_policy()->phase_times()->note_gc_start(active_workers); |
6752
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3765 log_gc_header(); |
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3766 |
3289
b52782ae3880
6946417: G1: Java VisualVM does not support G1 properly.
jmasa
parents:
3285
diff
changeset
|
3767 TraceCollectorStats tcs(g1mm()->incremental_collection_counters()); |
3356
78542e2b5e35
7036199: Adding a notification to the implementation of GarbageCollectorMXBeans
fparain
parents:
3323
diff
changeset
|
3768 TraceMemoryManagerStats tms(false /* fullGC */, gc_cause()); |
1089
db0d5eba9d20
6815790: G1: Missing MemoryPoolMXBeans with -XX:+UseG1GC
tonyp
parents:
1088
diff
changeset
|
3769 |
2361 | 3770 // If the secondary_free_list is not empty, append it to the |
3771 // free_list. No need to wait for the cleanup operation to finish; | |
3772 // the region allocation code will check the secondary_free_list | |
3773 // and wait if necessary. If the G1StressConcRegionFreeing flag is | |
3774 // set, skip this step so that the region allocation code has to | |
3775 // get entries from the secondary_free_list. | |
2152 | 3776 if (!G1StressConcRegionFreeing) { |
2361 | 3777 append_secondary_free_list_if_not_empty_with_lock(); |
2152 | 3778 } |
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3779 |
3867
ff53346271fe
6814390: G1: remove the concept of non-generational G1
brutisso
parents:
3830
diff
changeset
|
3780 assert(check_young_list_well_formed(), |
ff53346271fe
6814390: G1: remove the concept of non-generational G1
brutisso
parents:
3830
diff
changeset
|
3781 "young list should be well formed"); |
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3782 |
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
3783 // 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
|
3784 // 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
|
3785 // it will be set. |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
3786 |
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3787 { // 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
|
3788 IsGCActiveMark x; |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3789 |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3790 gc_prologue(false); |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3791 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
|
3792 increment_gc_time_stamp(); |
342 | 3793 |
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
|
3794 verify_before_gc(); |
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3795 |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3796 COMPILER2_PRESENT(DerivedPointerTable::clear()); |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3797 |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3798 // Please see comment in g1CollectedHeap.hpp and |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3799 // G1CollectedHeap::ref_processing_init() to see how |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3800 // reference processing currently works in G1. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3801 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3802 // Enable discovery in the STW reference processor |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3803 ref_processor_stw()->enable_discovery(true /*verify_disabled*/, |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3804 true /*verify_no_refs*/); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3805 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3806 { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3807 // We want to temporarily turn off discovery by the |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3808 // CM ref processor, if necessary, and turn it back on |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3809 // on again later if we do. Using a scoped |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3810 // NoRefDiscovery object will do this. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3811 NoRefDiscovery no_cm_discovery(ref_processor_cm()); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3812 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3813 // 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
|
3814 // of the collection set!). |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3815 release_mutator_alloc_region(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3816 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3817 // We should call this after we retire the mutator alloc |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3818 // region(s) so that all the ALLOC / RETIRE events are generated |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3819 // before the start GC event. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3820 _hr_printer.start_gc(false /* full */, (size_t) total_collections()); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3821 |
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
3822 // 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
|
3823 // 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
|
3824 // 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
|
3825 // |
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
3826 // 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
|
3827 // |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3828 // The elapsed time induced by the start time below deliberately elides |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3829 // 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
|
3830 double sample_start_time_sec = os::elapsedTime(); |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3831 size_t start_used_bytes = used(); |
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3832 |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
3833 #if YOUNG_LIST_VERBOSE |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3834 gclog_or_tty->print_cr("\nBefore recording pause start.\nYoung_list:"); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3835 _young_list->print(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3836 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
|
3837 #endif // YOUNG_LIST_VERBOSE |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
3838 |
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
3839 g1_policy()->record_collection_pause_start(sample_start_time_sec, |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3840 start_used_bytes); |
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3841 |
4837
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
3842 double scan_wait_start = os::elapsedTime(); |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
3843 // 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
|
3844 // 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
|
3845 // 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
|
3846 // moving them during the GC. |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
3847 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
|
3848 double wait_time_ms = 0.0; |
4837
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
3849 if (waited) { |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
3850 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
|
3851 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
|
3852 } |
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
3853 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
|
3854 |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
3855 #if YOUNG_LIST_VERBOSE |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3856 gclog_or_tty->print_cr("\nAfter recording pause start.\nYoung_list:"); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3857 _young_list->print(); |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
3858 #endif // YOUNG_LIST_VERBOSE |
342 | 3859 |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3860 if (g1_policy()->during_initial_mark_pause()) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3861 concurrent_mark()->checkpointRootsInitialPre(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3862 } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3863 |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
3864 #if YOUNG_LIST_VERBOSE |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3865 gclog_or_tty->print_cr("\nBefore choosing collection set.\nYoung_list:"); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3866 _young_list->print(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3867 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
|
3868 #endif // YOUNG_LIST_VERBOSE |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
3869 |
4912
a9647476d1a4
7132029: G1: mixed GC phase lasts for longer than it should
tonyp
parents:
4910
diff
changeset
|
3870 g1_policy()->finalize_cset(target_pause_time_ms); |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3871 |
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
3872 _cm->note_start_of_gc(); |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
3873 // 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
|
3874 // 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
|
3875 // 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
|
3876 // ensure that the CSet has been finalized. |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
3877 _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
|
3878 true /* verify_enqueued_buffers */, |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
3879 false /* verify_thread_buffers */, |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
3880 true /* verify_fingers */); |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
3881 |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3882 if (_hr_printer.is_active()) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3883 HeapRegion* hr = g1_policy()->collection_set(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3884 while (hr != NULL) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3885 G1HRPrinter::RegionType type; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3886 if (!hr->is_young()) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3887 type = G1HRPrinter::Old; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3888 } else if (hr->is_survivor()) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3889 type = G1HRPrinter::Survivor; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3890 } else { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3891 type = G1HRPrinter::Eden; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3892 } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3893 _hr_printer.cset(hr); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3894 hr = hr->next_in_collection_set(); |
3778
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
3895 } |
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
3896 } |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3897 |
3777
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3898 #ifdef ASSERT |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3899 VerifyCSetClosure cl; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3900 collection_set_iterate(&cl); |
3777
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3901 #endif // ASSERT |
1707 | 3902 |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3903 setup_surviving_young_words(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3904 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3905 // Initialize the GC alloc regions. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3906 init_gc_alloc_regions(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3907 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3908 // Actually do the work... |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3909 evacuate_collection_set(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3910 |
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
3911 // 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
|
3912 // (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
|
3913 // 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
|
3914 // 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
|
3915 // we checked. |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
3916 _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
|
3917 false /* verify_enqueued_buffers */, |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
3918 true /* verify_thread_buffers */, |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
3919 true /* verify_fingers */); |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
3920 |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3921 free_collection_set(g1_policy()->collection_set()); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3922 g1_policy()->clear_collection_set(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3923 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3924 cleanup_surviving_young_words(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3925 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3926 // Start a new incremental collection set for the next pause. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3927 g1_policy()->start_incremental_cset_building(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3928 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3929 // Clear the _cset_fast_test bitmap in anticipation of adding |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3930 // regions to the incremental collection set for the next |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3931 // evacuation pause. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3932 clear_cset_fast_test(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3933 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3934 _young_list->reset_sampled_info(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3935 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3936 // Don't check the whole heap at this point as the |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3937 // GC alloc regions from this pause have been tagged |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3938 // as survivors and moved on to the survivor list. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3939 // Survivor regions will fail the !is_young() check. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3940 assert(check_young_list_empty(false /* check_heap */), |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3941 "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
|
3942 |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
3943 #if YOUNG_LIST_VERBOSE |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3944 gclog_or_tty->print_cr("Before recording survivors.\nYoung List:"); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3945 _young_list->print(); |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
3946 #endif // YOUNG_LIST_VERBOSE |
342 | 3947 |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3948 g1_policy()->record_survivor_regions(_young_list->survivor_length(), |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3949 _young_list->first_survivor_region(), |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3950 _young_list->last_survivor_region()); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3951 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3952 _young_list->reset_auxilary_lists(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3953 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3954 if (evacuation_failed()) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3955 _summary_bytes_used = recalculate_used(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3956 } else { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3957 // The "used" of the the collection set have already been subtracted |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3958 // when they were freed. Add in the bytes evacuated. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3959 _summary_bytes_used += g1_policy()->bytes_copied_during_gc(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3960 } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3961 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3962 if (g1_policy()->during_initial_mark_pause()) { |
4837
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
3963 // 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
|
3964 // 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
|
3965 // appropriate initialization is done on the CM object. |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3966 concurrent_mark()->checkpointRootsInitialPost(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3967 set_marking_started(); |
4831
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3968 // 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
|
3969 // 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
|
3970 // the current thread has completed its logging output. |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3971 } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3972 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3973 allocate_dummy_regions(); |
3285
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
3974 |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
3975 #if YOUNG_LIST_VERBOSE |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3976 gclog_or_tty->print_cr("\nEnd of the pause.\nYoung_list:"); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3977 _young_list->print(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3978 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
|
3979 #endif // YOUNG_LIST_VERBOSE |
342 | 3980 |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3981 init_mutator_alloc_region(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3982 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3983 { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3984 size_t expand_bytes = g1_policy()->expansion_amount(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3985 if (expand_bytes > 0) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3986 size_t bytes_before = capacity(); |
4785 | 3987 // No need for an ergo verbose message here, |
3988 // expansion_amount() does this when it returns a value > 0. | |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3989 if (!expand(expand_bytes)) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3990 // We failed to expand the heap so let's verify that |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3991 // committed/uncommitted amount match the backing store |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3992 assert(capacity() == _g1_storage.committed_size(), "committed size mismatch"); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3993 assert(max_capacity() == _g1_storage.reserved_size(), "reserved size mismatch"); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3994 } |
3920
af2ab04e0038
6929868: G1: introduce min / max young gen size bounds
brutisso
parents:
3919
diff
changeset
|
3995 } |
af2ab04e0038
6929868: G1: introduce min / max young gen size bounds
brutisso
parents:
3919
diff
changeset
|
3996 } |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3997 |
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
3998 // We redo the verificaiton but now wrt to the new CSet which |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
3999 // 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
|
4000 _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
|
4001 true /* verify_enqueued_buffers */, |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4002 true /* verify_thread_buffers */, |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4003 true /* verify_fingers */); |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4004 _cm->note_end_of_gc(); |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4005 |
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
4006 // 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
|
4007 // 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
|
4008 // 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
|
4009 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
|
4010 double pause_time_ms = (sample_end_time_sec - sample_start_time_sec) * MILLIUNITS; |
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
4011 g1_policy()->record_collection_pause_end(pause_time_ms); |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4012 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4013 MemoryService::track_memory_usage(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4014 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4015 // 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
|
4016 // update buffers to bring the RSets up-to-date if |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4017 // G1HRRSFlushLogBuffersOnVerify has been set. While scanning |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4018 // 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
|
4019 // regions we just allocated to (i.e., the GC alloc |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4020 // regions). However, during the last GC we called |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4021 // set_saved_mark() on all the GC alloc regions, so card |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4022 // scanning might skip the [saved_mark_word()...top()] area of |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4023 // those regions (i.e., the area we allocated objects into |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4024 // during the last GC). But it shouldn't. Given that |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4025 // saved_mark_word() is conditional on whether the GC time stamp |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4026 // 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
|
4027 // 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
|
4028 // regions and saved_mark_word() will simply return top() for |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4029 // 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
|
4030 // than iterating over the regions and fixing them. In fact, the |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4031 // GC time stamp increment here also ensures that |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4032 // saved_mark_word() will return top() between pauses, i.e., |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4033 // during concurrent refinement. So we don't need the |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4034 // is_gc_active() check to decided which top to use when |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4035 // scanning cards (see CR 7039627). |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4036 increment_gc_time_stamp(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4037 |
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
|
4038 verify_after_gc(); |
3979
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 assert(!ref_processor_stw()->discovery_enabled(), "Postcondition"); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4041 ref_processor_stw()->verify_no_references_recorded(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4042 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4043 // 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
|
4044 } |
af2ab04e0038
6929868: G1: introduce min / max young gen size bounds
brutisso
parents:
3919
diff
changeset
|
4045 |
3778
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
4046 // 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
|
4047 // 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
|
4048 // 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
|
4049 // RETIRE events are generated before the end GC event. |
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
4050 _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
|
4051 |
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4052 if (mark_in_progress()) { |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4053 concurrent_mark()->update_g1_committed(); |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4054 } |
546
05c6d52fa7a9
6690928: Use spinning in combination with yields for workstealing termination.
jmasa
parents:
545
diff
changeset
|
4055 |
05c6d52fa7a9
6690928: Use spinning in combination with yields for workstealing termination.
jmasa
parents:
545
diff
changeset
|
4056 #ifdef TRACESPINNING |
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4057 ParallelTaskTerminator::print_termination_counts(); |
546
05c6d52fa7a9
6690928: Use spinning in combination with yields for workstealing termination.
jmasa
parents:
545
diff
changeset
|
4058 #endif |
342 | 4059 |
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4060 gc_epilogue(false); |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4061 } |
6121
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4062 |
7207
0f80645e9c26
8004170: G1: Verbose GC output is not getting flushed to log file using JDK 8
johnc
parents:
6863
diff
changeset
|
4063 // 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
|
4064 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
|
4065 |
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
4066 // It is 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
|
4067 // 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
|
4068 // 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
|
4069 // logging output either. |
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4070 |
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4071 _hrs.verify_optional(); |
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4072 verify_region_sets_optional(); |
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4073 |
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4074 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
|
4075 TASKQUEUE_STATS_ONLY(reset_taskqueue_stats()); |
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4076 |
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4077 print_heap_after_gc(); |
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4078 |
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4079 // 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
|
4080 // 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
|
4081 // 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
|
4082 // before any GC notifications are raised. |
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4083 g1mm()->update_sizes(); |
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4084 } |
3289
b52782ae3880
6946417: G1: Java VisualVM does not support G1 properly.
jmasa
parents:
3285
diff
changeset
|
4085 |
884
83b687ce3090
6866591: G1: print update buffer processing stats more often
tonyp
parents:
883
diff
changeset
|
4086 if (G1SummarizeRSetStats && |
83b687ce3090
6866591: G1: print update buffer processing stats more often
tonyp
parents:
883
diff
changeset
|
4087 (G1SummarizeRSetStatsPeriod > 0) && |
83b687ce3090
6866591: G1: print update buffer processing stats more often
tonyp
parents:
883
diff
changeset
|
4088 (total_collections() % G1SummarizeRSetStatsPeriod == 0)) { |
83b687ce3090
6866591: G1: print update buffer processing stats more often
tonyp
parents:
883
diff
changeset
|
4089 g1_rem_set()->print_summary_info(); |
83b687ce3090
6866591: G1: print update buffer processing stats more often
tonyp
parents:
883
diff
changeset
|
4090 } |
1973 | 4091 |
4831
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4092 // 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
|
4093 // 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
|
4094 // that came from the pause. |
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4095 |
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4096 if (should_start_conc_mark) { |
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4097 // CAUTION: after the doConcurrentMark() call below, |
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4098 // the concurrent marking thread(s) could be running |
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4099 // concurrently with us. Make sure that anything after |
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4100 // 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
|
4101 // 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
|
4102 // 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
|
4103 // ConcurrentGCThread::safepoint_desynchronize(). |
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4104 doConcurrentMark(); |
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4105 } |
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4106 |
1973 | 4107 return true; |
342 | 4108 } |
4109 | |
1391
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4110 size_t G1CollectedHeap::desired_plab_sz(GCAllocPurpose purpose) |
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4111 { |
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4112 size_t gclab_word_size; |
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4113 switch (purpose) { |
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4114 case GCAllocForSurvived: |
6595 | 4115 gclab_word_size = _survivor_plab_stats.desired_plab_sz(); |
1391
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4116 break; |
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4117 case GCAllocForTenured: |
6595 | 4118 gclab_word_size = _old_plab_stats.desired_plab_sz(); |
1391
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4119 break; |
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4120 default: |
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4121 assert(false, "unknown GCAllocPurpose"); |
6595 | 4122 gclab_word_size = _old_plab_stats.desired_plab_sz(); |
1391
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4123 break; |
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4124 } |
6595 | 4125 |
4126 // Prevent humongous PLAB sizes for two reasons: | |
4127 // * PLABs are allocated using a similar paths as oops, but should | |
4128 // never be in a humongous region | |
4129 // * Allowing humongous PLABs needlessly churns the region free lists | |
4130 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
|
4131 } |
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4132 |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
4133 void G1CollectedHeap::init_mutator_alloc_region() { |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
4134 assert(_mutator_alloc_region.get() == NULL, "pre-condition"); |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
4135 _mutator_alloc_region.init(); |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
4136 } |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
4137 |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
4138 void G1CollectedHeap::release_mutator_alloc_region() { |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
4139 _mutator_alloc_region.release(); |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
4140 assert(_mutator_alloc_region.get() == NULL, "post-condition"); |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
4141 } |
1391
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4142 |
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4143 void G1CollectedHeap::init_gc_alloc_regions() { |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4144 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
|
4145 |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4146 _survivor_gc_alloc_region.init(); |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4147 _old_gc_alloc_region.init(); |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4148 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
|
4149 _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
|
4150 |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4151 // 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
|
4152 // 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
|
4153 // 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
|
4154 // 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
|
4155 // 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
|
4156 // 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
|
4157 // during a cleanup and was added to the free list, but |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4158 // has been subseqently used to allocate a humongous |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4159 // 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
|
4160 if (retained_region != NULL && |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4161 !retained_region->in_collection_set() && |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4162 !(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
|
4163 !retained_region->is_empty() && |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4164 !retained_region->isHumongous()) { |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4165 retained_region->set_saved_mark(); |
4072 | 4166 // The retained region was added to the old region set when it was |
4167 // retired. We have to remove it now, since we don't allow regions | |
4168 // we allocate to in the region sets. We'll re-add it later, when | |
4169 // it's retired again. | |
4170 _old_set.remove(retained_region); | |
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4171 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
|
4172 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
|
4173 _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
|
4174 _hr_printer.reuse(retained_region); |
342 | 4175 } |
4176 } | |
4177 | |
6819 | 4178 void G1CollectedHeap::release_gc_alloc_regions(uint no_of_gc_workers) { |
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4179 _survivor_gc_alloc_region.release(); |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4180 // 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
|
4181 // _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
|
4182 // _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
|
4183 // 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
|
4184 // condition. |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4185 _retained_old_gc_alloc_region = _old_gc_alloc_region.release(); |
6595 | 4186 |
4187 if (ResizePLAB) { | |
6819 | 4188 _survivor_plab_stats.adjust_desired_plab_sz(no_of_gc_workers); |
4189 _old_plab_stats.adjust_desired_plab_sz(no_of_gc_workers); | |
6595 | 4190 } |
342 | 4191 } |
4192 | |
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4193 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
|
4194 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
|
4195 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
|
4196 _retained_old_gc_alloc_region = NULL; |
342 | 4197 } |
4198 | |
4199 void G1CollectedHeap::init_for_evac_failure(OopsInHeapRegionClosure* cl) { | |
4200 _drain_in_progress = false; | |
4201 set_evac_failure_closure(cl); | |
6197 | 4202 _evac_failure_scan_stack = new (ResourceObj::C_HEAP, mtGC) GrowableArray<oop>(40, true); |
342 | 4203 } |
4204 | |
4205 void G1CollectedHeap::finalize_for_evac_failure() { | |
4206 assert(_evac_failure_scan_stack != NULL && | |
4207 _evac_failure_scan_stack->length() == 0, | |
4208 "Postcondition"); | |
4209 assert(!_drain_in_progress, "Postcondition"); | |
1045 | 4210 delete _evac_failure_scan_stack; |
342 | 4211 _evac_failure_scan_stack = NULL; |
4212 } | |
4213 | |
4214 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
|
4215 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
|
4216 |
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4217 G1ParRemoveSelfForwardPtrsTask rsfp_task(this); |
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4218 |
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4219 if (G1CollectedHeap::use_parallel_gc_threads()) { |
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4220 set_par_threads(); |
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4221 workers()->run_task(&rsfp_task); |
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4222 set_par_threads(0); |
616
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
4223 } else { |
4783
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4224 rsfp_task.work(0); |
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4225 } |
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4226 |
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4227 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
|
4228 |
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4229 // 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
|
4230 reset_cset_heap_region_claim_values(); |
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4231 |
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4232 assert(check_cset_heap_region_claim_values(HeapRegion::InitialClaimValue), "sanity"); |
342 | 4233 |
4234 // 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
|
4235 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
|
4236 _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
|
4237 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
|
4238 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
|
4239 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
|
4240 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
|
4241 } |
ad747ee9d0b1
8002144: G1: large number of evacuation failures may lead to large c heap memory usage
brutisso
parents:
7455
diff
changeset
|
4242 _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
|
4243 _preserved_marks_of_objs.clear(true); |
342 | 4244 } |
4245 | |
4246 void G1CollectedHeap::push_on_evac_failure_scan_stack(oop obj) { | |
4247 _evac_failure_scan_stack->push(obj); | |
4248 } | |
4249 | |
4250 void G1CollectedHeap::drain_evac_failure_scan_stack() { | |
4251 assert(_evac_failure_scan_stack != NULL, "precondition"); | |
4252 | |
4253 while (_evac_failure_scan_stack->length() > 0) { | |
4254 oop obj = _evac_failure_scan_stack->pop(); | |
4255 _evac_failure_closure->set_region(heap_region_containing(obj)); | |
4256 obj->oop_iterate_backwards(_evac_failure_closure); | |
4257 } | |
4258 } | |
4259 | |
4260 oop | |
4261 G1CollectedHeap::handle_evacuation_failure_par(OopsInHeapRegionClosure* cl, | |
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4262 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
|
4263 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
|
4264 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
|
4265 (HeapWord*) old)); |
342 | 4266 markOop m = old->mark(); |
4267 oop forward_ptr = old->forward_to_atomic(old); | |
4268 if (forward_ptr == NULL) { | |
4269 // Forward-to-self succeeded. | |
3973
663cb89032b1
7092412: G1: Some roots not marked during an initial mark that gets an evacuation failure
johnc
parents:
3920
diff
changeset
|
4270 |
342 | 4271 if (_evac_failure_closure != cl) { |
4272 MutexLockerEx x(EvacFailureStack_lock, Mutex::_no_safepoint_check_flag); | |
4273 assert(!_drain_in_progress, | |
4274 "Should only be true while someone holds the lock."); | |
4275 // Set the global evac-failure closure to the current thread's. | |
4276 assert(_evac_failure_closure == NULL, "Or locking has failed."); | |
4277 set_evac_failure_closure(cl); | |
4278 // Now do the common part. | |
4279 handle_evacuation_failure_common(old, m); | |
4280 // Reset to NULL. | |
4281 set_evac_failure_closure(NULL); | |
4282 } else { | |
4283 // The lock is already held, and this is recursive. | |
4284 assert(_drain_in_progress, "This should only be the recursive case."); | |
4285 handle_evacuation_failure_common(old, m); | |
4286 } | |
4287 return old; | |
4288 } 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
|
4289 // 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
|
4290 // 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
|
4291 // 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
|
4292 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
|
4293 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
|
4294 "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
|
4295 (HeapWord*) old, (HeapWord*) forward_ptr)); |
342 | 4296 return forward_ptr; |
4297 } | |
4298 } | |
4299 | |
4300 void G1CollectedHeap::handle_evacuation_failure_common(oop old, markOop m) { | |
4301 set_evacuation_failed(true); | |
4302 | |
4303 preserve_mark_if_necessary(old, m); | |
4304 | |
4305 HeapRegion* r = heap_region_containing(old); | |
4306 if (!r->evacuation_failed()) { | |
4307 r->set_evacuation_failed(true); | |
3778
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
4308 _hr_printer.evac_failure(r); |
342 | 4309 } |
4310 | |
4311 push_on_evac_failure_scan_stack(old); | |
4312 | |
4313 if (!_drain_in_progress) { | |
4314 // prevent recursion in copy_to_survivor_space() | |
4315 _drain_in_progress = true; | |
4316 drain_evac_failure_scan_stack(); | |
4317 _drain_in_progress = false; | |
4318 } | |
4319 } | |
4320 | |
4321 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
|
4322 assert(evacuation_failed(), "Oversaving!"); |
74ee0db180fa
6807801: CMS: could save/restore fewer header words during scavenge
ysr
parents:
2037
diff
changeset
|
4323 // 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
|
4324 // case of a promotion failure. |
74ee0db180fa
6807801: CMS: could save/restore fewer header words during scavenge
ysr
parents:
2037
diff
changeset
|
4325 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
|
4326 _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
|
4327 _preserved_marks_of_objs.push(m); |
342 | 4328 } |
4329 } | |
4330 | |
4331 HeapWord* G1CollectedHeap::par_allocate_during_gc(GCAllocPurpose purpose, | |
4332 size_t word_size) { | |
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4333 if (purpose == GCAllocForSurvived) { |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4334 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
|
4335 if (result != NULL) { |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4336 return result; |
342 | 4337 } else { |
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4338 // 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
|
4339 // object there. |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4340 return old_attempt_allocation(word_size); |
342 | 4341 } |
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4342 } else { |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4343 assert(purpose == GCAllocForTenured, "sanity"); |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4344 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
|
4345 if (result != NULL) { |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4346 return result; |
342 | 4347 } else { |
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4348 // 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
|
4349 // object there. |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4350 return survivor_attempt_allocation(word_size); |
342 | 4351 } |
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4352 } |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4353 |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4354 ShouldNotReachHere(); |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4355 // 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
|
4356 return NULL; |
342 | 4357 } |
4358 | |
3886
eeae91c9baba
7080389: G1: refactor marking code in evacuation pause copy closures
johnc
parents:
3869
diff
changeset
|
4359 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
|
4360 ParGCAllocBuffer(gclab_word_size), _retired(false) { } |
3886
eeae91c9baba
7080389: G1: refactor marking code in evacuation pause copy closures
johnc
parents:
3869
diff
changeset
|
4361 |
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4834
diff
changeset
|
4362 G1ParScanThreadState::G1ParScanThreadState(G1CollectedHeap* g1h, uint queue_num) |
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4363 : _g1h(g1h), |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4364 _refs(g1h->task_queue(queue_num)), |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4365 _dcq(&g1h->dirty_card_queue_set()), |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4366 _ct_bs((CardTableModRefBS*)_g1h->barrier_set()), |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4367 _g1_rem(g1h->g1_rem_set()), |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4368 _hash_seed(17), _queue_num(queue_num), |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4369 _term_attempts(0), |
1391
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4370 _surviving_alloc_buffer(g1h->desired_plab_sz(GCAllocForSurvived)), |
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4371 _tenured_alloc_buffer(g1h->desired_plab_sz(GCAllocForTenured)), |
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4372 _age_table(false), |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4373 _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
|
4374 _alloc_buffer_waste(0), _undo_waste(0) { |
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4375 // we allocate G1YoungSurvRateNumRegions plus one entries, since |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4376 // 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
|
4377 // non-young regions (where the age is -1) |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4378 // 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
|
4379 // an attempt to eliminate cache contention |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
4380 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
|
4381 uint array_length = PADDING_ELEM_NUM + |
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
4382 real_length + |
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
4383 PADDING_ELEM_NUM; |
6197 | 4384 _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
|
4385 if (_surviving_young_words_base == NULL) |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4386 vm_exit_out_of_memory(array_length * sizeof(size_t), |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4387 "Not enough space for young surv histo."); |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4388 _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
|
4389 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
|
4390 |
1391
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4391 _alloc_buffers[GCAllocForSurvived] = &_surviving_alloc_buffer; |
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4392 _alloc_buffers[GCAllocForTenured] = &_tenured_alloc_buffer; |
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4393 |
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4394 _start = os::elapsedTime(); |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4395 } |
342 | 4396 |
1709 | 4397 void |
4398 G1ParScanThreadState::print_termination_stats_hdr(outputStream* const st) | |
4399 { | |
4400 st->print_raw_cr("GC Termination Stats"); | |
4401 st->print_raw_cr(" elapsed --strong roots-- -------termination-------" | |
4402 " ------waste (KiB)------"); | |
4403 st->print_raw_cr("thr ms ms % ms % attempts" | |
4404 " total alloc undo"); | |
4405 st->print_raw_cr("--- --------- --------- ------ --------- ------ --------" | |
4406 " ------- ------- -------"); | |
4407 } | |
4408 | |
4409 void | |
4410 G1ParScanThreadState::print_termination_stats(int i, | |
4411 outputStream* const st) const | |
4412 { | |
4413 const double elapsed_ms = elapsed_time() * 1000.0; | |
4414 const double s_roots_ms = strong_roots_time() * 1000.0; | |
4415 const double term_ms = term_time() * 1000.0; | |
4416 st->print_cr("%3d %9.2f %9.2f %6.2f " | |
4417 "%9.2f %6.2f " SIZE_FORMAT_W(8) " " | |
4418 SIZE_FORMAT_W(7) " " SIZE_FORMAT_W(7) " " SIZE_FORMAT_W(7), | |
4419 i, elapsed_ms, s_roots_ms, s_roots_ms * 100 / elapsed_ms, | |
4420 term_ms, term_ms * 100 / elapsed_ms, term_attempts(), | |
4421 (alloc_buffer_waste() + undo_waste()) * HeapWordSize / K, | |
4422 alloc_buffer_waste() * HeapWordSize / K, | |
4423 undo_waste() * HeapWordSize / K); | |
4424 } | |
4425 | |
1862
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4426 #ifdef ASSERT |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4427 bool G1ParScanThreadState::verify_ref(narrowOop* ref) const { |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4428 assert(ref != NULL, "invariant"); |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4429 assert(UseCompressedOops, "sanity"); |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4430 assert(!has_partial_array_mask(ref), err_msg("ref=" PTR_FORMAT, ref)); |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4431 oop p = oopDesc::load_decode_heap_oop(ref); |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4432 assert(_g1h->is_in_g1_reserved(p), |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4433 err_msg("ref=" PTR_FORMAT " p=" PTR_FORMAT, ref, intptr_t(p))); |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4434 return true; |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4435 } |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4436 |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4437 bool G1ParScanThreadState::verify_ref(oop* ref) const { |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4438 assert(ref != NULL, "invariant"); |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4439 if (has_partial_array_mask(ref)) { |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4440 // Must be in the collection set--it's already been copied. |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4441 oop p = clear_partial_array_mask(ref); |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4442 assert(_g1h->obj_in_cs(p), |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4443 err_msg("ref=" PTR_FORMAT " p=" PTR_FORMAT, ref, intptr_t(p))); |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4444 } else { |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4445 oop p = oopDesc::load_decode_heap_oop(ref); |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4446 assert(_g1h->is_in_g1_reserved(p), |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4447 err_msg("ref=" PTR_FORMAT " p=" PTR_FORMAT, ref, intptr_t(p))); |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4448 } |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4449 return true; |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4450 } |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4451 |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4452 bool G1ParScanThreadState::verify_task(StarTask ref) const { |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4453 if (ref.is_narrow()) { |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4454 return verify_ref((narrowOop*) ref); |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4455 } else { |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4456 return verify_ref((oop*) ref); |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4457 } |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4458 } |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4459 #endif // ASSERT |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4460 |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4461 void G1ParScanThreadState::trim_queue() { |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4462 assert(_evac_cl != NULL, "not set"); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4463 assert(_evac_failure_cl != NULL, "not set"); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4464 assert(_partial_scan_cl != NULL, "not set"); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4465 |
1862
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4466 StarTask ref; |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4467 do { |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4468 // Drain the overflow stack first, so other threads can steal. |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4469 while (refs()->pop_overflow(ref)) { |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4470 deal_with_reference(ref); |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4471 } |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4472 |
1862
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4473 while (refs()->pop_local(ref)) { |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4474 deal_with_reference(ref); |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4475 } |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4476 } while (!refs()->is_empty()); |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4477 } |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4478 |
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4479 G1ParClosureSuper::G1ParClosureSuper(G1CollectedHeap* g1, |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4480 G1ParScanThreadState* par_scan_state) : |
342 | 4481 _g1(g1), _g1_rem(_g1->g1_rem_set()), _cm(_g1->concurrent_mark()), |
3886
eeae91c9baba
7080389: G1: refactor marking code in evacuation pause copy closures
johnc
parents:
3869
diff
changeset
|
4482 _par_scan_state(par_scan_state), |
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4834
diff
changeset
|
4483 _worker_id(par_scan_state->queue_num()), |
3886
eeae91c9baba
7080389: G1: refactor marking code in evacuation pause copy closures
johnc
parents:
3869
diff
changeset
|
4484 _during_initial_mark(_g1->g1_policy()->during_initial_mark_pause()), |
eeae91c9baba
7080389: G1: refactor marking code in evacuation pause copy closures
johnc
parents:
3869
diff
changeset
|
4485 _mark_in_progress(_g1->mark_in_progress()) { } |
eeae91c9baba
7080389: G1: refactor marking code in evacuation pause copy closures
johnc
parents:
3869
diff
changeset
|
4486 |
5987 | 4487 template <bool do_gen_barrier, G1Barrier barrier, bool do_mark_object> |
4488 void G1ParCopyClosure<do_gen_barrier, barrier, do_mark_object>::mark_object(oop obj) { | |
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4489 #ifdef ASSERT |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4490 HeapRegion* hr = _g1->heap_region_containing(obj); |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4491 assert(hr != NULL, "sanity"); |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4492 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
|
4493 #endif // ASSERT |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4494 |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4495 // 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
|
4496 _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
|
4497 } |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4498 |
5987 | 4499 template <bool do_gen_barrier, G1Barrier barrier, bool do_mark_object> |
4500 void G1ParCopyClosure<do_gen_barrier, barrier, do_mark_object> | |
4501 ::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
|
4502 #ifdef ASSERT |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4503 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
|
4504 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
|
4505 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
|
4506 |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4507 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
|
4508 assert(from_hr != NULL, "sanity"); |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4509 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
|
4510 |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4511 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
|
4512 assert(to_hr != NULL, "sanity"); |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4513 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
|
4514 #endif // ASSERT |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4515 |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4516 // 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
|
4517 // 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
|
4518 // 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
|
4519 // image which we know should not be changing. |
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4834
diff
changeset
|
4520 _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
|
4521 } |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4522 |
5987 | 4523 template <bool do_gen_barrier, G1Barrier barrier, bool do_mark_object> |
4524 oop G1ParCopyClosure<do_gen_barrier, barrier, do_mark_object> | |
4525 ::copy_to_survivor_space(oop old) { | |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
4526 size_t word_sz = old->size(); |
342 | 4527 HeapRegion* from_region = _g1->heap_region_containing_raw(old); |
4528 // +1 to make the -1 indexes valid... | |
4529 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
|
4530 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
|
4531 (!from_region->is_young() && young_index == 0), "invariant" ); |
342 | 4532 G1CollectorPolicy* g1p = _g1->g1_policy(); |
4533 markOop m = old->mark(); | |
545 | 4534 int age = m->has_displaced_mark_helper() ? m->displaced_mark_helper()->age() |
4535 : m->age(); | |
4536 GCAllocPurpose alloc_purpose = g1p->evacuation_destination(from_region, age, | |
342 | 4537 word_sz); |
4538 HeapWord* obj_ptr = _par_scan_state->allocate(alloc_purpose, word_sz); | |
6629
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
4539 #ifndef PRODUCT |
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
4540 // Should this evacuation fail? |
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
4541 if (_g1->evacuation_should_fail()) { |
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
4542 if (obj_ptr != NULL) { |
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
4543 _par_scan_state->undo_allocation(alloc_purpose, obj_ptr, word_sz); |
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
4544 obj_ptr = NULL; |
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
4545 } |
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
4546 } |
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
4547 #endif // !PRODUCT |
342 | 4548 |
4549 if (obj_ptr == NULL) { | |
4550 // This will either forward-to-self, or detect that someone else has | |
4551 // installed a forwarding pointer. | |
4552 OopsInHeapRegionClosure* cl = _par_scan_state->evac_failure_closure(); | |
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4553 return _g1->handle_evacuation_failure_par(cl, old); |
342 | 4554 } |
4555 | |
6629
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
4556 oop obj = oop(obj_ptr); |
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
4557 |
526 | 4558 // We're going to allocate linearly, so might as well prefetch ahead. |
4559 Prefetch::write(obj_ptr, PrefetchCopyIntervalInBytes); | |
4560 | |
342 | 4561 oop forward_ptr = old->forward_to_atomic(obj); |
4562 if (forward_ptr == NULL) { | |
4563 Copy::aligned_disjoint_words((HeapWord*) old, obj_ptr, word_sz); | |
526 | 4564 if (g1p->track_object_age(alloc_purpose)) { |
4565 // We could simply do obj->incr_age(). However, this causes a | |
4566 // performance issue. obj->incr_age() will first check whether | |
4567 // the object has a displaced mark by checking its mark word; | |
4568 // getting the mark word from the new location of the object | |
4569 // stalls. So, given that we already have the mark word and we | |
4570 // are about to install it anyway, it's better to increase the | |
4571 // age on the mark word, when the object does not have a | |
4572 // displaced mark word. We're not expecting many objects to have | |
4573 // a displaced marked word, so that case is not optimized | |
4574 // further (it could be...) and we simply call obj->incr_age(). | |
4575 | |
4576 if (m->has_displaced_mark_helper()) { | |
4577 // in this case, we have to install the mark word first, | |
4578 // otherwise obj looks to be forwarded (the old mark word, | |
4579 // which contains the forward pointer, was copied) | |
4580 obj->set_mark(m); | |
4581 obj->incr_age(); | |
4582 } else { | |
4583 m = m->incr_age(); | |
545 | 4584 obj->set_mark(m); |
526 | 4585 } |
545 | 4586 _par_scan_state->age_table()->add(obj, word_sz); |
4587 } else { | |
4588 obj->set_mark(m); | |
526 | 4589 } |
4590 | |
342 | 4591 size_t* surv_young_words = _par_scan_state->surviving_young_words(); |
4592 surv_young_words[young_index] += word_sz; | |
4593 | |
4594 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
|
4595 // 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
|
4596 // 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
|
4597 // 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
|
4598 arrayOop(obj)->set_length(0); |
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4599 oop* old_p = set_partial_array_mask(old); |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4600 _par_scan_state->push_on_queue(old_p); |
342 | 4601 } else { |
526 | 4602 // No point in using the slower heap_region_containing() method, |
4603 // given that we know obj is in the heap. | |
5987 | 4604 _scanner.set_region(_g1->heap_region_containing_raw(obj)); |
4605 obj->oop_iterate_backwards(&_scanner); | |
342 | 4606 } |
4607 } else { | |
4608 _par_scan_state->undo_allocation(alloc_purpose, obj_ptr, word_sz); | |
4609 obj = forward_ptr; | |
4610 } | |
4611 return obj; | |
4612 } | |
4613 | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4614 template <class T> |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4615 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
|
4616 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
|
4617 _scanned_klass->record_modified_oops(); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4618 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4619 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4620 |
3886
eeae91c9baba
7080389: G1: refactor marking code in evacuation pause copy closures
johnc
parents:
3869
diff
changeset
|
4621 template <bool do_gen_barrier, G1Barrier barrier, bool do_mark_object> |
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4622 template <class T> |
3886
eeae91c9baba
7080389: G1: refactor marking code in evacuation pause copy closures
johnc
parents:
3869
diff
changeset
|
4623 void G1ParCopyClosure<do_gen_barrier, barrier, do_mark_object> |
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4624 ::do_oop_work(T* p) { |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4625 oop obj = oopDesc::load_decode_heap_oop(p); |
342 | 4626 assert(barrier != G1BarrierRS || obj != NULL, |
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4627 "Precondition: G1BarrierRS implies obj is non-NULL"); |
3886
eeae91c9baba
7080389: G1: refactor marking code in evacuation pause copy closures
johnc
parents:
3869
diff
changeset
|
4628 |
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4834
diff
changeset
|
4629 assert(_worker_id == _par_scan_state->queue_num(), "sanity"); |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4834
diff
changeset
|
4630 |
526 | 4631 // here the null check is implicit in the cset_fast_test() test |
1261
0414c1049f15
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
1245
diff
changeset
|
4632 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
|
4633 oop forwardee; |
526 | 4634 if (obj->is_forwarded()) { |
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4635 forwardee = obj->forwardee(); |
526 | 4636 } else { |
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4637 forwardee = copy_to_survivor_space(obj); |
342 | 4638 } |
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4639 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
|
4640 oopDesc::encode_store_heap_oop(p, forwardee); |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4641 if (do_mark_object && forwardee != obj) { |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4642 // 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
|
4643 // 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
|
4644 mark_forwarded_object(obj, forwardee); |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4645 } |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4646 |
526 | 4647 // When scanning the RS, we only care about objs in CS. |
4648 if (barrier == G1BarrierRS) { | |
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4834
diff
changeset
|
4649 _par_scan_state->update_rs(_from, p, _worker_id); |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4650 } else if (barrier == G1BarrierKlass) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4651 do_klass_barrier(p, forwardee); |
342 | 4652 } |
3886
eeae91c9baba
7080389: G1: refactor marking code in evacuation pause copy closures
johnc
parents:
3869
diff
changeset
|
4653 } else { |
eeae91c9baba
7080389: G1: refactor marking code in evacuation pause copy closures
johnc
parents:
3869
diff
changeset
|
4654 // 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
|
4655 // 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
|
4656 // be true) then attempt to mark the object. |
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4657 if (do_mark_object && _g1->is_in_g1_reserved(obj)) { |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4658 mark_object(obj); |
3886
eeae91c9baba
7080389: G1: refactor marking code in evacuation pause copy closures
johnc
parents:
3869
diff
changeset
|
4659 } |
526 | 4660 } |
4661 | |
4662 if (barrier == G1BarrierEvac && obj != NULL) { | |
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4834
diff
changeset
|
4663 _par_scan_state->update_rs(_from, p, _worker_id); |
526 | 4664 } |
4665 | |
4666 if (do_gen_barrier && obj != NULL) { | |
4667 par_do_barrier(p); | |
4668 } | |
4669 } | |
4670 | |
1261
0414c1049f15
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
1245
diff
changeset
|
4671 template void G1ParCopyClosure<false, G1BarrierEvac, false>::do_oop_work(oop* p); |
0414c1049f15
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
1245
diff
changeset
|
4672 template void G1ParCopyClosure<false, G1BarrierEvac, false>::do_oop_work(narrowOop* p); |
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4673 |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4674 template <class T> void G1ParScanPartialArrayClosure::do_oop_nv(T* p) { |
526 | 4675 assert(has_partial_array_mask(p), "invariant"); |
4784
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4676 oop from_obj = clear_partial_array_mask(p); |
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4677 |
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4678 assert(Universe::heap()->is_in_reserved(from_obj), "must be in heap."); |
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4679 assert(from_obj->is_objArray(), "must be obj array"); |
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4680 objArrayOop from_obj_array = objArrayOop(from_obj); |
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4681 // The from-space object contains the real length. |
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4682 int length = from_obj_array->length(); |
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4683 |
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4684 assert(from_obj->is_forwarded(), "must be forwarded"); |
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4685 oop to_obj = from_obj->forwardee(); |
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4686 assert(from_obj != to_obj, "should not be chunking self-forwarded objects"); |
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4687 objArrayOop to_obj_array = objArrayOop(to_obj); |
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4688 // We keep track of the next start index in the length field of the |
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4689 // to-space object. |
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4690 int next_index = to_obj_array->length(); |
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4691 assert(0 <= next_index && next_index < length, |
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4692 err_msg("invariant, next index: %d, length: %d", next_index, length)); |
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4693 |
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4694 int start = next_index; |
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4695 int end = length; |
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4696 int remainder = end - start; |
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4697 // We'll try not to push a range that's smaller than ParGCArrayScanChunk. |
342 | 4698 if (remainder > 2 * ParGCArrayScanChunk) { |
4699 end = start + ParGCArrayScanChunk; | |
4784
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4700 to_obj_array->set_length(end); |
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4701 // Push the remainder before we process the range in case another |
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4702 // worker has run out of things to do and can steal it. |
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4703 oop* from_obj_p = set_partial_array_mask(from_obj); |
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4704 _par_scan_state->push_on_queue(from_obj_p); |
342 | 4705 } else { |
4784
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4706 assert(length == end, "sanity"); |
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4707 // We'll process the final range for this object. Restore the length |
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4708 // so that the heap remains parsable in case of evacuation failure. |
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4709 to_obj_array->set_length(end); |
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4710 } |
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4711 _scanner.set_region(_g1->heap_region_containing_raw(to_obj)); |
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4712 // Process indexes [start,end). It will also process the header |
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4713 // along with the first chunk (i.e., the chunk with start == 0). |
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4714 // Note that at this point the length field of to_obj_array is not |
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4715 // correct given that we are using it to keep track of the next |
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4716 // start index. oop_iterate_range() (thankfully!) ignores the length |
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4717 // field and only relies on the start / end parameters. It does |
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4718 // however return the size of the object which will be incorrect. So |
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4719 // we have to ignore it even if we wanted to use it. |
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4720 to_obj_array->oop_iterate_range(&_scanner, start, end); |
342 | 4721 } |
4722 | |
4723 class G1ParEvacuateFollowersClosure : public VoidClosure { | |
4724 protected: | |
4725 G1CollectedHeap* _g1h; | |
4726 G1ParScanThreadState* _par_scan_state; | |
4727 RefToScanQueueSet* _queues; | |
4728 ParallelTaskTerminator* _terminator; | |
4729 | |
4730 G1ParScanThreadState* par_scan_state() { return _par_scan_state; } | |
4731 RefToScanQueueSet* queues() { return _queues; } | |
4732 ParallelTaskTerminator* terminator() { return _terminator; } | |
4733 | |
4734 public: | |
4735 G1ParEvacuateFollowersClosure(G1CollectedHeap* g1h, | |
4736 G1ParScanThreadState* par_scan_state, | |
4737 RefToScanQueueSet* queues, | |
4738 ParallelTaskTerminator* terminator) | |
4739 : _g1h(g1h), _par_scan_state(par_scan_state), | |
4740 _queues(queues), _terminator(terminator) {} | |
4741 | |
1862
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4742 void do_void(); |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4743 |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4744 private: |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4745 inline bool offer_termination(); |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4746 }; |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4747 |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4748 bool G1ParEvacuateFollowersClosure::offer_termination() { |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4749 G1ParScanThreadState* const pss = par_scan_state(); |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4750 pss->start_term_time(); |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4751 const bool res = terminator()->offer_termination(); |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4752 pss->end_term_time(); |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4753 return res; |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4754 } |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4755 |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4756 void G1ParEvacuateFollowersClosure::do_void() { |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4757 StarTask stolen_task; |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4758 G1ParScanThreadState* const pss = par_scan_state(); |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4759 pss->trim_queue(); |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4760 |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4761 do { |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4762 while (queues()->steal(pss->queue_num(), pss->hash_seed(), stolen_task)) { |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4763 assert(pss->verify_task(stolen_task), "sanity"); |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4764 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
|
4765 pss->deal_with_reference((narrowOop*) stolen_task); |
1862
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4766 } else { |
1883
35e4e086d5f5
6990359: G1: don't push a stolen entry on the taskqueue, deal with it directly
tonyp
parents:
1862
diff
changeset
|
4767 pss->deal_with_reference((oop*) stolen_task); |
1862
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4768 } |
1883
35e4e086d5f5
6990359: G1: don't push a stolen entry on the taskqueue, deal with it directly
tonyp
parents:
1862
diff
changeset
|
4769 |
35e4e086d5f5
6990359: G1: don't push a stolen entry on the taskqueue, deal with it directly
tonyp
parents:
1862
diff
changeset
|
4770 // We've just processed a reference and we might have made |
35e4e086d5f5
6990359: G1: don't push a stolen entry on the taskqueue, deal with it directly
tonyp
parents:
1862
diff
changeset
|
4771 // available new entries on the queues. So we have to make sure |
35e4e086d5f5
6990359: G1: don't push a stolen entry on the taskqueue, deal with it directly
tonyp
parents:
1862
diff
changeset
|
4772 // we drain the queues as necessary. |
342 | 4773 pss->trim_queue(); |
4774 } | |
1862
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4775 } while (!offer_termination()); |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4776 |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4777 pss->retire_alloc_buffers(); |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4778 } |
342 | 4779 |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4780 class G1KlassScanClosure : public KlassClosure { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4781 G1ParCopyHelper* _closure; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4782 bool _process_only_dirty; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4783 int _count; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4784 public: |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4785 G1KlassScanClosure(G1ParCopyHelper* closure, bool process_only_dirty) |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4786 : _process_only_dirty(process_only_dirty), _closure(closure), _count(0) {} |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4787 void do_klass(Klass* klass) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4788 // If the klass has not been dirtied we know that there's |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4789 // no references into the young gen and we can skip it. |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4790 if (!_process_only_dirty || klass->has_modified_oops()) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4791 // Clean the klass since we're going to scavenge all the metadata. |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4792 klass->clear_modified_oops(); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4793 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4794 // Tell the closure that this klass is the Klass to scavenge |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4795 // and is the one to dirty if oops are left pointing into the young gen. |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4796 _closure->set_scanned_klass(klass); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4797 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4798 klass->oops_do(_closure); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4799 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4800 _closure->set_scanned_klass(NULL); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4801 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4802 _count++; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4803 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4804 }; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4805 |
342 | 4806 class G1ParTask : public AbstractGangTask { |
4807 protected: | |
4808 G1CollectedHeap* _g1h; | |
4809 RefToScanQueueSet *_queues; | |
4810 ParallelTaskTerminator _terminator; | |
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
4811 uint _n_workers; |
342 | 4812 |
4813 Mutex _stats_lock; | |
4814 Mutex* stats_lock() { return &_stats_lock; } | |
4815 | |
4816 size_t getNCards() { | |
4817 return (_g1h->capacity() + G1BlockOffsetSharedArray::N_bytes - 1) | |
4818 / G1BlockOffsetSharedArray::N_bytes; | |
4819 } | |
4820 | |
4821 public: | |
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
4822 G1ParTask(G1CollectedHeap* g1h, |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
4823 RefToScanQueueSet *task_queues) |
342 | 4824 : AbstractGangTask("G1 collection"), |
4825 _g1h(g1h), | |
4826 _queues(task_queues), | |
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
4827 _terminator(0, _queues), |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
4828 _stats_lock(Mutex::leaf, "parallel G1 stats lock", true) |
342 | 4829 {} |
4830 | |
4831 RefToScanQueueSet* queues() { return _queues; } | |
4832 | |
4833 RefToScanQueue *work_queue(int i) { | |
4834 return queues()->queue(i); | |
4835 } | |
4836 | |
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
4837 ParallelTaskTerminator* terminator() { return &_terminator; } |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
4838 |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
4839 virtual void set_for_termination(int active_workers) { |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
4840 // This task calls set_n_termination() in par_non_clean_card_iterate_work() |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
4841 // in the young space (_par_seq_tasks) in the G1 heap |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
4842 // for SequentialSubTasksDone. |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
4843 // This task also uses SubTasksDone in SharedHeap and G1CollectedHeap |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
4844 // both of which need setting by set_n_termination(). |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
4845 _g1h->SharedHeap::set_n_termination(active_workers); |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
4846 _g1h->set_n_termination(active_workers); |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
4847 terminator()->reset_for_reuse(active_workers); |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
4848 _n_workers = active_workers; |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
4849 } |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
4850 |
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
4851 void work(uint worker_id) { |
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
4852 if (worker_id >= _n_workers) return; // no work needed this round |
1611 | 4853 |
4854 double start_time_ms = os::elapsedTime() * 1000.0; | |
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
4855 _g1h->g1_policy()->phase_times()->record_gc_worker_start_time(worker_id, start_time_ms); |
1611 | 4856 |
5986
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4857 { |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4858 ResourceMark rm; |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4859 HandleMark hm; |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4860 |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4861 ReferenceProcessor* rp = _g1h->ref_processor_stw(); |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4862 |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4863 G1ParScanThreadState pss(_g1h, worker_id); |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4864 G1ParScanHeapEvacClosure scan_evac_cl(_g1h, &pss, rp); |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4865 G1ParScanHeapEvacFailureClosure evac_failure_cl(_g1h, &pss, rp); |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4866 G1ParScanPartialArrayClosure partial_scan_cl(_g1h, &pss, rp); |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4867 |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4868 pss.set_evac_closure(&scan_evac_cl); |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4869 pss.set_evac_failure_closure(&evac_failure_cl); |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4870 pss.set_partial_scan_closure(&partial_scan_cl); |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4871 |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4872 G1ParScanExtRootClosure only_scan_root_cl(_g1h, &pss, rp); |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4873 G1ParScanMetadataClosure only_scan_metadata_cl(_g1h, &pss, rp); |
5986
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4874 |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4875 G1ParScanAndMarkExtRootClosure scan_mark_root_cl(_g1h, &pss, rp); |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4876 G1ParScanAndMarkMetadataClosure scan_mark_metadata_cl(_g1h, &pss, rp); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4877 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4878 bool only_young = _g1h->g1_policy()->gcs_are_young(); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4879 G1KlassScanClosure scan_mark_klasses_cl_s(&scan_mark_metadata_cl, false); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4880 G1KlassScanClosure only_scan_klasses_cl_s(&only_scan_metadata_cl, only_young); |
5986
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4881 |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4882 OopClosure* scan_root_cl = &only_scan_root_cl; |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4883 G1KlassScanClosure* scan_klasses_cl = &only_scan_klasses_cl_s; |
5986
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4884 |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4885 if (_g1h->g1_policy()->during_initial_mark_pause()) { |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4886 // We also need to mark copied objects. |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4887 scan_root_cl = &scan_mark_root_cl; |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4888 scan_klasses_cl = &scan_mark_klasses_cl_s; |
5986
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4889 } |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4890 |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4891 G1ParPushHeapRSClosure push_heap_rs_cl(_g1h, &pss); |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4892 |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4893 int so = SharedHeap::SO_AllClasses | SharedHeap::SO_Strings | SharedHeap::SO_CodeCache; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4894 |
5986
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4895 pss.start_strong_roots(); |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4896 _g1h->g1_process_strong_roots(/* is scavenging */ true, |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4897 SharedHeap::ScanningOption(so), |
5986
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4898 scan_root_cl, |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4899 &push_heap_rs_cl, |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4900 scan_klasses_cl, |
5986
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4901 worker_id); |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4902 pss.end_strong_roots(); |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4903 |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4904 { |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4905 double start = os::elapsedTime(); |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4906 G1ParEvacuateFollowersClosure evac(_g1h, &pss, _queues, &_terminator); |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4907 evac.do_void(); |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4908 double elapsed_ms = (os::elapsedTime()-start)*1000.0; |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4909 double term_ms = pss.term_time()*1000.0; |
6628
bb3f6194fedb
7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code
brutisso
parents:
6611
diff
changeset
|
4910 _g1h->g1_policy()->phase_times()->add_obj_copy_time(worker_id, elapsed_ms-term_ms); |
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
4911 _g1h->g1_policy()->phase_times()->record_termination(worker_id, term_ms, pss.term_attempts()); |
5986
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4912 } |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4913 _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
|
4914 _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
|
4915 |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4916 if (ParallelGCVerbose) { |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4917 MutexLocker x(stats_lock()); |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4918 pss.print_termination_stats(worker_id); |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4919 } |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4920 |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4921 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
|
4922 |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4923 // Close the inner scope so that the ResourceMark and HandleMark |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4924 // destructors are executed here and are included as part of the |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4925 // "GC Worker Time". |
342 | 4926 } |
4927 | |
1611 | 4928 double end_time_ms = os::elapsedTime() * 1000.0; |
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
4929 _g1h->g1_policy()->phase_times()->record_gc_worker_end_time(worker_id, end_time_ms); |
342 | 4930 } |
4931 }; | |
4932 | |
4933 // *** Common G1 Evacuation Stuff | |
4934 | |
5986
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4935 // Closures that support the filtering of CodeBlobs scanned during |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4936 // external root scanning. |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4937 |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4938 // Closure applied to reference fields in code blobs (specifically nmethods) |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4939 // to determine whether an nmethod contains references that point into |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4940 // the collection set. Used as a predicate when walking code roots so |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4941 // that only nmethods that point into the collection set are added to the |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4942 // 'marked' list. |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4943 |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4944 class G1FilteredCodeBlobToOopClosure : public CodeBlobToOopClosure { |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4945 |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4946 class G1PointsIntoCSOopClosure : public OopClosure { |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4947 G1CollectedHeap* _g1; |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4948 bool _points_into_cs; |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4949 public: |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4950 G1PointsIntoCSOopClosure(G1CollectedHeap* g1) : |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4951 _g1(g1), _points_into_cs(false) { } |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4952 |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4953 bool points_into_cs() const { return _points_into_cs; } |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4954 |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4955 template <class T> |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4956 void do_oop_nv(T* p) { |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4957 if (!_points_into_cs) { |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4958 T heap_oop = oopDesc::load_heap_oop(p); |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4959 if (!oopDesc::is_null(heap_oop) && |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4960 _g1->in_cset_fast_test(oopDesc::decode_heap_oop_not_null(heap_oop))) { |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4961 _points_into_cs = true; |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4962 } |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4963 } |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4964 } |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4965 |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4966 virtual void do_oop(oop* p) { do_oop_nv(p); } |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4967 virtual void do_oop(narrowOop* p) { do_oop_nv(p); } |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4968 }; |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4969 |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4970 G1CollectedHeap* _g1; |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4971 |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4972 public: |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4973 G1FilteredCodeBlobToOopClosure(G1CollectedHeap* g1, OopClosure* cl) : |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4974 CodeBlobToOopClosure(cl, true), _g1(g1) { } |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4975 |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4976 virtual void do_code_blob(CodeBlob* cb) { |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4977 nmethod* nm = cb->as_nmethod_or_null(); |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4978 if (nm != NULL && !(nm->test_oops_do_mark())) { |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4979 G1PointsIntoCSOopClosure predicate_cl(_g1); |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4980 nm->oops_do(&predicate_cl); |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4981 |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4982 if (predicate_cl.points_into_cs()) { |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4983 // At least one of the reference fields or the oop relocations |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4984 // in the nmethod points into the collection set. We have to |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4985 // 'mark' this nmethod. |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4986 // Note: Revisit the following if CodeBlobToOopClosure::do_code_blob() |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4987 // or MarkingCodeBlobClosure::do_code_blob() change. |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4988 if (!nm->test_set_oops_do_mark()) { |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4989 do_newly_marked_nmethod(nm); |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4990 } |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4991 } |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4992 } |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4993 } |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4994 }; |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4995 |
1833
8b10f48633dc
6984287: Regularize how GC parallel workers are specified.
jmasa
parents:
1755
diff
changeset
|
4996 // This method is run in a GC worker. |
8b10f48633dc
6984287: Regularize how GC parallel workers are specified.
jmasa
parents:
1755
diff
changeset
|
4997 |
342 | 4998 void |
4999 G1CollectedHeap:: | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5000 g1_process_strong_roots(bool is_scavenging, |
4910
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
5001 ScanningOption so, |
342 | 5002 OopClosure* scan_non_heap_roots, |
5003 OopsInHeapRegionClosure* scan_rs, | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5004 G1KlassScanClosure* scan_klasses, |
342 | 5005 int worker_i) { |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5006 |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5007 // First scan the strong roots |
342 | 5008 double ext_roots_start = os::elapsedTime(); |
5009 double closure_app_time_sec = 0.0; | |
5010 | |
5011 BufferingOopClosure buf_scan_non_heap_roots(scan_non_heap_roots); | |
5012 | |
989
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
890
diff
changeset
|
5013 // Walk the code cache w/o buffering, because StarTask cannot handle |
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
890
diff
changeset
|
5014 // unaligned oop locations. |
5986
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5015 G1FilteredCodeBlobToOopClosure eager_scan_code_roots(this, scan_non_heap_roots); |
989
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
890
diff
changeset
|
5016 |
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
890
diff
changeset
|
5017 process_strong_roots(false, // no scoping; this is parallel code |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5018 is_scavenging, so, |
342 | 5019 &buf_scan_non_heap_roots, |
989
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
890
diff
changeset
|
5020 &eager_scan_code_roots, |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5021 scan_klasses |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5022 ); |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
5023 |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5024 // 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
|
5025 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
|
5026 // We need to treat the discovered reference lists of the |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5027 // concurrent mark ref processor as roots and keep entries |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5028 // (which are added by the marking threads) on them live |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5029 // until they can be processed at the end of marking. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5030 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
|
5031 } |
14a2fd14c0db
7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents:
3778
diff
changeset
|
5032 |
14a2fd14c0db
7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents:
3778
diff
changeset
|
5033 // Finish up any enqueued closure apps (attributed as object copy time). |
342 | 5034 buf_scan_non_heap_roots.done(); |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5035 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5036 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
|
5037 |
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
5038 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
|
5039 |
342 | 5040 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
|
5041 ((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
|
5042 |
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
5043 g1_policy()->phase_times()->record_ext_root_scan_time(worker_i, ext_root_time_ms); |
342 | 5044 |
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
5045 // 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
|
5046 // 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
|
5047 // 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
|
5048 double satb_filtering_ms = 0.0; |
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
5049 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
|
5050 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
|
5051 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
|
5052 |
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
5053 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
|
5054 |
bb3f6194fedb
7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code
brutisso
parents:
6611
diff
changeset
|
5055 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
|
5056 } |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
5057 } |
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
5058 g1_policy()->phase_times()->record_satb_filtering_time(worker_i, satb_filtering_ms); |
342 | 5059 |
5060 // Now scan the complement of the collection set. | |
5061 if (scan_rs != NULL) { | |
5062 g1_rem_set()->oops_into_collection_set_do(scan_rs, worker_i); | |
5063 } | |
5064 _process_strong_tasks->all_tasks_completed(); | |
5065 } | |
5066 | |
5067 void | |
5068 G1CollectedHeap::g1_process_weak_roots(OopClosure* root_closure, | |
5069 OopClosure* non_root_closure) { | |
989
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
890
diff
changeset
|
5070 CodeBlobToOopClosure roots_in_blobs(root_closure, /*do_marking=*/ false); |
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
890
diff
changeset
|
5071 SharedHeap::process_weak_roots(root_closure, &roots_in_blobs, non_root_closure); |
342 | 5072 } |
5073 | |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5074 // Weak Reference Processing support |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5075 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5076 // An always "is_alive" closure that is used to preserve referents. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5077 // 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
|
5078 // of referent objects that are pointed to by reference objects |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5079 // discovered by the CM ref processor. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5080 class G1AlwaysAliveClosure: public BoolObjectClosure { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5081 G1CollectedHeap* _g1; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5082 public: |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5083 G1AlwaysAliveClosure(G1CollectedHeap* g1) : _g1(g1) {} |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5084 void do_object(oop p) { assert(false, "Do not call."); } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5085 bool do_object_b(oop p) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5086 if (p != NULL) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5087 return true; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5088 } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5089 return false; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5090 } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5091 }; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5092 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5093 bool G1STWIsAliveClosure::do_object_b(oop p) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5094 // An object is reachable if it is outside the collection set, |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5095 // or is inside and copied. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5096 return !_g1->obj_in_cs(p) || p->is_forwarded(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5097 } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5098 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5099 // Non Copying Keep Alive closure |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5100 class G1KeepAliveClosure: public OopClosure { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5101 G1CollectedHeap* _g1; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5102 public: |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5103 G1KeepAliveClosure(G1CollectedHeap* g1) : _g1(g1) {} |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5104 void do_oop(narrowOop* p) { guarantee(false, "Not needed"); } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5105 void do_oop( oop* p) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5106 oop obj = *p; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5107 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5108 if (_g1->obj_in_cs(obj)) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5109 assert( obj->is_forwarded(), "invariant" ); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5110 *p = obj->forwardee(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5111 } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5112 } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5113 }; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5114 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5115 // Copying Keep Alive closure - can be called from both |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5116 // serial and parallel code as long as different worker |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5117 // threads utilize different G1ParScanThreadState instances |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5118 // and different queues. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5119 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5120 class G1CopyingKeepAliveClosure: public OopClosure { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5121 G1CollectedHeap* _g1h; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5122 OopClosure* _copy_non_heap_obj_cl; |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5123 OopsInHeapRegionClosure* _copy_metadata_obj_cl; |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5124 G1ParScanThreadState* _par_scan_state; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5125 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5126 public: |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5127 G1CopyingKeepAliveClosure(G1CollectedHeap* g1h, |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5128 OopClosure* non_heap_obj_cl, |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5129 OopsInHeapRegionClosure* metadata_obj_cl, |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5130 G1ParScanThreadState* pss): |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5131 _g1h(g1h), |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5132 _copy_non_heap_obj_cl(non_heap_obj_cl), |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5133 _copy_metadata_obj_cl(metadata_obj_cl), |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5134 _par_scan_state(pss) |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5135 {} |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5136 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5137 virtual void do_oop(narrowOop* p) { do_oop_work(p); } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5138 virtual void do_oop( oop* p) { do_oop_work(p); } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5139 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5140 template <class T> void do_oop_work(T* p) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5141 oop obj = oopDesc::load_decode_heap_oop(p); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5142 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5143 if (_g1h->obj_in_cs(obj)) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5144 // If the referent object has been forwarded (either copied |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5145 // to a new location or to itself in the event of an |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5146 // evacuation failure) then we need to update the reference |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5147 // field and, if both reference and referent are in the G1 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5148 // heap, update the RSet for the referent. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5149 // |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5150 // If the referent has not been forwarded then we have to keep |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5151 // it alive by policy. Therefore we have copy the referent. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5152 // |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5153 // If the reference field is in the G1 heap then we can push |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5154 // on the PSS queue. When the queue is drained (after each |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5155 // phase of reference processing) the object and it's followers |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5156 // will be copied, the reference field set to point to the |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5157 // new location, and the RSet updated. Otherwise we need to |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5158 // use the the non-heap or metadata closures directly to copy |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5159 // the refernt object and update the pointer, while avoiding |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5160 // updating the RSet. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5161 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5162 if (_g1h->is_in_g1_reserved(p)) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5163 _par_scan_state->push_on_queue(p); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5164 } else { |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5165 assert(!ClassLoaderDataGraph::contains((address)p), |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5166 err_msg("Otherwise need to call _copy_metadata_obj_cl->do_oop(p) " |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5167 PTR_FORMAT, p)); |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5168 _copy_non_heap_obj_cl->do_oop(p); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5169 } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5170 } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5171 } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5172 }; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5173 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5174 // Serial drain queue closure. Called as the 'complete_gc' |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5175 // closure for each discovered list in some of the |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5176 // reference processing phases. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5177 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5178 class G1STWDrainQueueClosure: public VoidClosure { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5179 protected: |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5180 G1CollectedHeap* _g1h; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5181 G1ParScanThreadState* _par_scan_state; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5182 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5183 G1ParScanThreadState* par_scan_state() { return _par_scan_state; } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5184 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5185 public: |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5186 G1STWDrainQueueClosure(G1CollectedHeap* g1h, G1ParScanThreadState* pss) : |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5187 _g1h(g1h), |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5188 _par_scan_state(pss) |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5189 { } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5190 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5191 void do_void() { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5192 G1ParScanThreadState* const pss = par_scan_state(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5193 pss->trim_queue(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5194 } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5195 }; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5196 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5197 // Parallel Reference Processing closures |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5198 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5199 // Implementation of AbstractRefProcTaskExecutor for parallel reference |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5200 // processing during G1 evacuation pauses. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5201 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5202 class G1STWRefProcTaskExecutor: public AbstractRefProcTaskExecutor { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5203 private: |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5204 G1CollectedHeap* _g1h; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5205 RefToScanQueueSet* _queues; |
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5206 FlexibleWorkGang* _workers; |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5207 int _active_workers; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5208 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5209 public: |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5210 G1STWRefProcTaskExecutor(G1CollectedHeap* g1h, |
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5211 FlexibleWorkGang* workers, |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5212 RefToScanQueueSet *task_queues, |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5213 int n_workers) : |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5214 _g1h(g1h), |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5215 _queues(task_queues), |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5216 _workers(workers), |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5217 _active_workers(n_workers) |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5218 { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5219 assert(n_workers > 0, "shouldn't call this otherwise"); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5220 } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5221 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5222 // Executes the given task using concurrent marking worker threads. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5223 virtual void execute(ProcessTask& task); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5224 virtual void execute(EnqueueTask& task); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5225 }; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5226 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5227 // Gang task for possibly parallel reference processing |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5228 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5229 class G1STWRefProcTaskProxy: public AbstractGangTask { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5230 typedef AbstractRefProcTaskExecutor::ProcessTask ProcessTask; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5231 ProcessTask& _proc_task; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5232 G1CollectedHeap* _g1h; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5233 RefToScanQueueSet *_task_queues; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5234 ParallelTaskTerminator* _terminator; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5235 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5236 public: |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5237 G1STWRefProcTaskProxy(ProcessTask& proc_task, |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5238 G1CollectedHeap* g1h, |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5239 RefToScanQueueSet *task_queues, |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5240 ParallelTaskTerminator* terminator) : |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5241 AbstractGangTask("Process reference objects in parallel"), |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5242 _proc_task(proc_task), |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5243 _g1h(g1h), |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5244 _task_queues(task_queues), |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5245 _terminator(terminator) |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5246 {} |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5247 |
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
5248 virtual void work(uint worker_id) { |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5249 // The reference processing task executed by a single worker. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5250 ResourceMark rm; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5251 HandleMark hm; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5252 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5253 G1STWIsAliveClosure is_alive(_g1h); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5254 |
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
5255 G1ParScanThreadState pss(_g1h, worker_id); |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5256 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5257 G1ParScanHeapEvacClosure scan_evac_cl(_g1h, &pss, NULL); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5258 G1ParScanHeapEvacFailureClosure evac_failure_cl(_g1h, &pss, NULL); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5259 G1ParScanPartialArrayClosure partial_scan_cl(_g1h, &pss, NULL); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5260 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5261 pss.set_evac_closure(&scan_evac_cl); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5262 pss.set_evac_failure_closure(&evac_failure_cl); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5263 pss.set_partial_scan_closure(&partial_scan_cl); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5264 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5265 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
|
5266 G1ParScanMetadataClosure only_copy_metadata_cl(_g1h, &pss, NULL); |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5267 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5268 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
|
5269 G1ParScanAndMarkMetadataClosure copy_mark_metadata_cl(_g1h, &pss, NULL); |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5270 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5271 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
|
5272 OopsInHeapRegionClosure* copy_metadata_cl = &only_copy_metadata_cl; |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5273 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5274 if (_g1h->g1_policy()->during_initial_mark_pause()) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5275 // We also need to mark copied objects. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5276 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
|
5277 copy_metadata_cl = ©_mark_metadata_cl; |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5278 } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5279 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5280 // Keep alive closure. |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5281 G1CopyingKeepAliveClosure keep_alive(_g1h, copy_non_heap_cl, copy_metadata_cl, &pss); |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5282 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5283 // Complete GC closure |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5284 G1ParEvacuateFollowersClosure drain_queue(_g1h, &pss, _task_queues, _terminator); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5285 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5286 // Call the reference processing task's work routine. |
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
5287 _proc_task.work(worker_id, is_alive, keep_alive, drain_queue); |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5288 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5289 // Note we cannot assert that the refs array is empty here as not all |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5290 // of the processing tasks (specifically phase2 - pp2_work) execute |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5291 // the complete_gc closure (which ordinarily would drain the queue) so |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5292 // the queue may not be empty. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5293 } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5294 }; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5295 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5296 // Driver routine for parallel reference processing. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5297 // Creates an instance of the ref processing gang |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5298 // task and has the worker threads execute it. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5299 void G1STWRefProcTaskExecutor::execute(ProcessTask& proc_task) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5300 assert(_workers != NULL, "Need parallel worker threads."); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5301 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5302 ParallelTaskTerminator terminator(_active_workers, _queues); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5303 G1STWRefProcTaskProxy proc_task_proxy(proc_task, _g1h, _queues, &terminator); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5304 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5305 _g1h->set_par_threads(_active_workers); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5306 _workers->run_task(&proc_task_proxy); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5307 _g1h->set_par_threads(0); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5308 } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5309 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5310 // Gang task for parallel reference enqueueing. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5311 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5312 class G1STWRefEnqueueTaskProxy: public AbstractGangTask { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5313 typedef AbstractRefProcTaskExecutor::EnqueueTask EnqueueTask; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5314 EnqueueTask& _enq_task; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5315 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5316 public: |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5317 G1STWRefEnqueueTaskProxy(EnqueueTask& enq_task) : |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5318 AbstractGangTask("Enqueue reference objects in parallel"), |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5319 _enq_task(enq_task) |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5320 { } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5321 |
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
5322 virtual void work(uint worker_id) { |
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
5323 _enq_task.work(worker_id); |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5324 } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5325 }; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5326 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5327 // Driver routine for parallel reference enqueing. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5328 // Creates an instance of the ref enqueueing gang |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5329 // task and has the worker threads execute it. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5330 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5331 void G1STWRefProcTaskExecutor::execute(EnqueueTask& enq_task) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5332 assert(_workers != NULL, "Need parallel worker threads."); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5333 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5334 G1STWRefEnqueueTaskProxy enq_task_proxy(enq_task); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5335 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5336 _g1h->set_par_threads(_active_workers); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5337 _workers->run_task(&enq_task_proxy); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5338 _g1h->set_par_threads(0); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5339 } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5340 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5341 // End of weak reference support closures |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5342 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5343 // Abstract task used to preserve (i.e. copy) any referent objects |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5344 // 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
|
5345 // objects discovered by the CM ref processor. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5346 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5347 class G1ParPreserveCMReferentsTask: public AbstractGangTask { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5348 protected: |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5349 G1CollectedHeap* _g1h; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5350 RefToScanQueueSet *_queues; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5351 ParallelTaskTerminator _terminator; |
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
5352 uint _n_workers; |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5353 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5354 public: |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5355 G1ParPreserveCMReferentsTask(G1CollectedHeap* g1h,int workers, RefToScanQueueSet *task_queues) : |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5356 AbstractGangTask("ParPreserveCMReferents"), |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5357 _g1h(g1h), |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5358 _queues(task_queues), |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5359 _terminator(workers, _queues), |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5360 _n_workers(workers) |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5361 { } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5362 |
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
5363 void work(uint worker_id) { |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5364 ResourceMark rm; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5365 HandleMark hm; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5366 |
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
5367 G1ParScanThreadState pss(_g1h, worker_id); |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5368 G1ParScanHeapEvacClosure scan_evac_cl(_g1h, &pss, NULL); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5369 G1ParScanHeapEvacFailureClosure evac_failure_cl(_g1h, &pss, NULL); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5370 G1ParScanPartialArrayClosure partial_scan_cl(_g1h, &pss, NULL); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5371 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5372 pss.set_evac_closure(&scan_evac_cl); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5373 pss.set_evac_failure_closure(&evac_failure_cl); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5374 pss.set_partial_scan_closure(&partial_scan_cl); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5375 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5376 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
|
5377 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5378 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5379 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
|
5380 G1ParScanMetadataClosure only_copy_metadata_cl(_g1h, &pss, NULL); |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5381 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5382 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
|
5383 G1ParScanAndMarkMetadataClosure copy_mark_metadata_cl(_g1h, &pss, NULL); |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5384 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5385 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
|
5386 OopsInHeapRegionClosure* copy_metadata_cl = &only_copy_metadata_cl; |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5387 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5388 if (_g1h->g1_policy()->during_initial_mark_pause()) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5389 // We also need to mark copied objects. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5390 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
|
5391 copy_metadata_cl = ©_mark_metadata_cl; |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5392 } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5393 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5394 // Is alive closure |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5395 G1AlwaysAliveClosure always_alive(_g1h); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5396 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5397 // Copying keep alive closure. Applied to referent objects that need |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5398 // to be copied. |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5399 G1CopyingKeepAliveClosure keep_alive(_g1h, copy_non_heap_cl, copy_metadata_cl, &pss); |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5400 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5401 ReferenceProcessor* rp = _g1h->ref_processor_cm(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5402 |
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
5403 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
|
5404 uint stride = MIN2(MAX2(_n_workers, 1U), limit); |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5405 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5406 // limit is set using max_num_q() - which was set using ParallelGCThreads. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5407 // So this must be true - but assert just in case someone decides to |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5408 // change the worker ids. |
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
5409 assert(0 <= worker_id && worker_id < limit, "sanity"); |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5410 assert(!rp->discovery_is_atomic(), "check this code"); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5411 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5412 // 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
|
5413 for (uint idx = worker_id; idx < limit; idx += stride) { |
4014
bf2d2b8b1726
7095243: Disambiguate ReferenceProcessor::_discoveredSoftRefs
johnc
parents:
4013
diff
changeset
|
5414 DiscoveredList& ref_list = rp->discovered_refs()[idx]; |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5415 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5416 DiscoveredListIterator iter(ref_list, &keep_alive, &always_alive); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5417 while (iter.has_next()) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5418 // Since discovery is not atomic for the CM ref processor, we |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5419 // can see some null referent objects. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5420 iter.load_ptrs(DEBUG_ONLY(true)); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5421 oop ref = iter.obj(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5422 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5423 // This will filter nulls. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5424 if (iter.is_referent_alive()) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5425 iter.make_referent_alive(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5426 } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5427 iter.move_to_next(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5428 } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5429 } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5430 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5431 // Drain the queue - which may cause stealing |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5432 G1ParEvacuateFollowersClosure drain_queue(_g1h, &pss, _queues, &_terminator); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5433 drain_queue.do_void(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5434 // Allocation buffers were retired at the end of G1ParEvacuateFollowersClosure |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5435 assert(pss.refs()->is_empty(), "should be"); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5436 } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5437 }; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5438 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5439 // Weak Reference processing during an evacuation pause (part 1). |
6819 | 5440 void G1CollectedHeap::process_discovered_references(uint no_of_gc_workers) { |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5441 double ref_proc_start = os::elapsedTime(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5442 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5443 ReferenceProcessor* rp = _ref_processor_stw; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5444 assert(rp->discovery_enabled(), "should have been enabled"); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5445 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5446 // Any reference objects, in the collection set, that were 'discovered' |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5447 // 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
|
5448 // applying the external root copy closure to the discovered lists, or |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5449 // by following an RSet entry). |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5450 // |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5451 // 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
|
5452 // 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
|
5453 // processor would have seen that the reference object had already |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5454 // been 'discovered' and would have skipped discovering the reference, |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5455 // but would not have treated the reference object as a regular oop. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5456 // As a reult the copy closure would not have been applied to the |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5457 // referent object. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5458 // |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5459 // We need to explicitly copy these referent objects - the references |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5460 // will be processed at the end of remarking. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5461 // |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5462 // 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
|
5463 // 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
|
5464 // referents points to another object which is also referenced by an |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5465 // object discovered by the STW ref processor. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5466 |
4711 | 5467 assert(!G1CollectedHeap::use_parallel_gc_threads() || |
6819 | 5468 no_of_gc_workers == workers()->active_workers(), |
5469 "Need to reset active GC workers"); | |
5470 | |
5471 set_par_threads(no_of_gc_workers); | |
5472 G1ParPreserveCMReferentsTask keep_cm_referents(this, | |
5473 no_of_gc_workers, | |
5474 _task_queues); | |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5475 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5476 if (G1CollectedHeap::use_parallel_gc_threads()) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5477 workers()->run_task(&keep_cm_referents); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5478 } else { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5479 keep_cm_referents.work(0); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5480 } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5481 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5482 set_par_threads(0); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5483 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5484 // Closure to test whether a referent is alive. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5485 G1STWIsAliveClosure is_alive(this); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5486 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5487 // Even when parallel reference processing is enabled, the processing |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5488 // 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
|
5489 // 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
|
5490 // JNI refs. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5491 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5492 // Use only a single queue for this PSS. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5493 G1ParScanThreadState pss(this, 0); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5494 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5495 // We do not embed a reference processor in the copying/scanning |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5496 // closures while we're actually processing the discovered |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5497 // reference objects. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5498 G1ParScanHeapEvacClosure scan_evac_cl(this, &pss, NULL); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5499 G1ParScanHeapEvacFailureClosure evac_failure_cl(this, &pss, NULL); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5500 G1ParScanPartialArrayClosure partial_scan_cl(this, &pss, NULL); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5501 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5502 pss.set_evac_closure(&scan_evac_cl); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5503 pss.set_evac_failure_closure(&evac_failure_cl); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5504 pss.set_partial_scan_closure(&partial_scan_cl); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5505 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5506 assert(pss.refs()->is_empty(), "pre-condition"); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5507 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5508 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
|
5509 G1ParScanMetadataClosure only_copy_metadata_cl(this, &pss, NULL); |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5510 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5511 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
|
5512 G1ParScanAndMarkMetadataClosure copy_mark_metadata_cl(this, &pss, NULL); |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5513 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5514 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
|
5515 OopsInHeapRegionClosure* copy_metadata_cl = &only_copy_metadata_cl; |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5516 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5517 if (_g1h->g1_policy()->during_initial_mark_pause()) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5518 // We also need to mark copied objects. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5519 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
|
5520 copy_metadata_cl = ©_mark_metadata_cl; |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5521 } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5522 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5523 // Keep alive closure. |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5524 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
|
5525 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5526 // Serial Complete GC closure |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5527 G1STWDrainQueueClosure drain_queue(this, &pss); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5528 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5529 // Setup the soft refs policy... |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5530 rp->setup_policy(false); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5531 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5532 if (!rp->processing_is_mt()) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5533 // Serial reference processing... |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5534 rp->process_discovered_references(&is_alive, |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5535 &keep_alive, |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5536 &drain_queue, |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5537 NULL); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5538 } else { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5539 // Parallel reference processing |
6819 | 5540 assert(rp->num_q() == no_of_gc_workers, "sanity"); |
5541 assert(no_of_gc_workers <= rp->max_num_q(), "sanity"); | |
5542 | |
5543 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
|
5544 rp->process_discovered_references(&is_alive, &keep_alive, &drain_queue, &par_task_executor); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5545 } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5546 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5547 // We have completed copying any necessary live referent objects |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5548 // (that were not copied during the actual pause) so we can |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5549 // retire any active alloc buffers |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5550 pss.retire_alloc_buffers(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5551 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
|
5552 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5553 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
|
5554 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
|
5555 } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5556 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5557 // Weak Reference processing during an evacuation pause (part 2). |
6819 | 5558 void G1CollectedHeap::enqueue_discovered_references(uint no_of_gc_workers) { |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5559 double ref_enq_start = os::elapsedTime(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5560 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5561 ReferenceProcessor* rp = _ref_processor_stw; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5562 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
|
5563 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5564 // Now enqueue any remaining on the discovered lists on to |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5565 // the pending list. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5566 if (!rp->processing_is_mt()) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5567 // Serial reference processing... |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5568 rp->enqueue_discovered_references(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5569 } else { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5570 // Parallel reference enqueuing |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5571 |
6819 | 5572 assert(no_of_gc_workers == workers()->active_workers(), |
5573 "Need to reset active workers"); | |
5574 assert(rp->num_q() == no_of_gc_workers, "sanity"); | |
5575 assert(no_of_gc_workers <= rp->max_num_q(), "sanity"); | |
5576 | |
5577 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
|
5578 rp->enqueue_discovered_references(&par_task_executor); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5579 } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5580 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5581 rp->verify_no_references_recorded(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5582 assert(!rp->discovery_enabled(), "should have been disabled"); |
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 // FIXME |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5585 // 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
|
5586 // Should we do that here also? We could, but it is a serial operation |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5587 // and could signicantly increase the pause time. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5588 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5589 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
|
5590 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
|
5591 } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5592 |
342 | 5593 void G1CollectedHeap::evacuate_collection_set() { |
4781
bacb651cf5bf
7113006: G1: excessive ergo output when an evac failure happens
tonyp
parents:
4728
diff
changeset
|
5594 _expand_heap_after_alloc_failure = true; |
342 | 5595 set_evacuation_failed(false); |
5596 | |
6629
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
5597 // 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
|
5598 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
|
5599 |
342 | 5600 g1_rem_set()->prepare_for_oops_into_collection_set_do(); |
5601 concurrent_g1_refine()->set_use_cache(false); | |
889 | 5602 concurrent_g1_refine()->clear_hot_cache_claimed_index(); |
5603 | |
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
5604 uint n_workers; |
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5605 if (G1CollectedHeap::use_parallel_gc_threads()) { |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5606 n_workers = |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5607 AdaptiveSizePolicy::calc_active_workers(workers()->total_workers(), |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5608 workers()->active_workers(), |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5609 Threads::number_of_non_daemon_threads()); |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5610 assert(UseDynamicNumberOfGCThreads || |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5611 n_workers == workers()->total_workers(), |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5612 "If not dynamic should be using all the workers"); |
4711 | 5613 workers()->set_active_workers(n_workers); |
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5614 set_par_threads(n_workers); |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5615 } else { |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5616 assert(n_par_threads() == 0, |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5617 "Should be the original non-parallel value"); |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5618 n_workers = 1; |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5619 } |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5620 |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5621 G1ParTask g1_par_task(this, _task_queues); |
342 | 5622 |
5623 init_for_evac_failure(NULL); | |
5624 | |
5625 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
|
5626 |
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
5627 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
|
5628 double start_par_time_sec = os::elapsedTime(); |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5629 double end_par_time_sec; |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5630 |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5631 { |
989
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
890
diff
changeset
|
5632 StrongRootsScope srs(this); |
5986
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5633 |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5634 if (G1CollectedHeap::use_parallel_gc_threads()) { |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5635 // 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
|
5636 if (ParallelGCVerbose) G1ParScanThreadState::print_termination_stats_hdr(); |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5637 // These tasks use ShareHeap::_process_strong_tasks |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5638 assert(UseDynamicNumberOfGCThreads || |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5639 workers()->active_workers() == workers()->total_workers(), |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5640 "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
|
5641 workers()->run_task(&g1_par_task); |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5642 } else { |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5643 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
|
5644 g1_par_task.work(0); |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5645 } |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5646 end_par_time_sec = os::elapsedTime(); |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5647 |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5648 // 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
|
5649 // 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
|
5650 // 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
|
5651 // 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
|
5652 // reported parallel time. |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5653 } |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5654 |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5655 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
|
5656 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
|
5657 |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5658 double code_root_fixup_time_ms = |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5659 (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
|
5660 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
|
5661 |
342 | 5662 set_par_threads(0); |
1974
fd1d227ef1b9
6983204: G1: Nightly test nsk/regression/b4958615 failing with +ExplicitGCInvokesConcurrent
johnc
parents:
1973
diff
changeset
|
5663 |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5664 // Process any discovered reference objects - we have |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5665 // to do this _before_ we retire the GC alloc regions |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5666 // as we may have to copy some 'reachable' referent |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5667 // objects (and their reachable sub-graphs) that were |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5668 // not copied during the pause. |
6819 | 5669 process_discovered_references(n_workers); |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5670 |
1974
fd1d227ef1b9
6983204: G1: Nightly test nsk/regression/b4958615 failing with +ExplicitGCInvokesConcurrent
johnc
parents:
1973
diff
changeset
|
5671 // Weak root processing. |
fd1d227ef1b9
6983204: G1: Nightly test nsk/regression/b4958615 failing with +ExplicitGCInvokesConcurrent
johnc
parents:
1973
diff
changeset
|
5672 // Note: when JSR 292 is enabled and code blobs can contain |
fd1d227ef1b9
6983204: G1: Nightly test nsk/regression/b4958615 failing with +ExplicitGCInvokesConcurrent
johnc
parents:
1973
diff
changeset
|
5673 // non-perm oops then we will need to process the code blobs |
fd1d227ef1b9
6983204: G1: Nightly test nsk/regression/b4958615 failing with +ExplicitGCInvokesConcurrent
johnc
parents:
1973
diff
changeset
|
5674 // here too. |
342 | 5675 { |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5676 G1STWIsAliveClosure is_alive(this); |
342 | 5677 G1KeepAliveClosure keep_alive(this); |
5678 JNIHandles::weak_oops_do(&is_alive, &keep_alive); | |
5679 } | |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5680 |
6819 | 5681 release_gc_alloc_regions(n_workers); |
342 | 5682 g1_rem_set()->cleanup_after_oops_into_collection_set_do(); |
616
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
5683 |
889 | 5684 concurrent_g1_refine()->clear_hot_cache(); |
342 | 5685 concurrent_g1_refine()->set_use_cache(true); |
5686 | |
5687 finalize_for_evac_failure(); | |
5688 | |
5689 if (evacuation_failed()) { | |
5690 remove_self_forwarding_pointers(); | |
6629
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
5691 |
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
5692 // Reset the G1EvacuationFailureALot counters and flags |
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
5693 // 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
|
5694 // evacuation failure occurs. |
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
5695 NOT_PRODUCT(reset_evacuation_should_fail();) |
342 | 5696 } |
5697 | |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5698 // Enqueue any remaining references remaining on the STW |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5699 // reference processor's discovered lists. We need to do |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5700 // this after the card table is cleaned (and verified) as |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5701 // the act of enqueuing entries on to the pending list |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5702 // will log these updates (and dirty their associated |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5703 // cards). We need these updates logged to update any |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5704 // RSets. |
6819 | 5705 enqueue_discovered_references(n_workers); |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5706 |
616
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
5707 if (G1DeferredRSUpdate) { |
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
5708 RedirtyLoggedCardTableEntryFastClosure redirty; |
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
5709 dirty_card_queue_set().set_closure(&redirty); |
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
5710 dirty_card_queue_set().apply_closure_to_all_completed_buffers(); |
1111 | 5711 |
5712 DirtyCardQueueSet& dcq = JavaThread::dirty_card_queue_set(); | |
5713 dcq.merge_bufferlists(&dirty_card_queue_set()); | |
616
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
5714 assert(dirty_card_queue_set().completed_buffers_num() == 0, "All should be consumed"); |
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
5715 } |
342 | 5716 COMPILER2_PRESENT(DerivedPointerTable::update_pointers()); |
5717 } | |
5718 | |
2173 | 5719 void G1CollectedHeap::free_region_if_empty(HeapRegion* hr, |
2152 | 5720 size_t* pre_used, |
5721 FreeRegionList* free_list, | |
4072 | 5722 OldRegionSet* old_proxy_set, |
2152 | 5723 HumongousRegionSet* humongous_proxy_set, |
2173 | 5724 HRRSCleanupTask* hrrs_cleanup_task, |
2152 | 5725 bool par) { |
5726 if (hr->used() > 0 && hr->max_live_bytes() == 0 && !hr->is_young()) { | |
5727 if (hr->isHumongous()) { | |
5728 assert(hr->startsHumongous(), "we should only see starts humongous"); | |
5729 free_humongous_region(hr, pre_used, free_list, humongous_proxy_set, par); | |
5730 } else { | |
4072 | 5731 _old_set.remove_with_proxy(hr, old_proxy_set); |
2152 | 5732 free_region(hr, pre_used, free_list, par); |
342 | 5733 } |
2173 | 5734 } else { |
5735 hr->rem_set()->do_cleanup_work(hrrs_cleanup_task); | |
342 | 5736 } |
5737 } | |
5738 | |
2152 | 5739 void G1CollectedHeap::free_region(HeapRegion* hr, |
5740 size_t* pre_used, | |
5741 FreeRegionList* free_list, | |
5742 bool par) { | |
5743 assert(!hr->isHumongous(), "this is only for non-humongous regions"); | |
5744 assert(!hr->is_empty(), "the region should not be empty"); | |
5745 assert(free_list != NULL, "pre-condition"); | |
5746 | |
5747 *pre_used += hr->used(); | |
5748 hr->hr_clear(par, true /* clear_space */); | |
2432
455328d90876
7029458: G1: Add newly-reclaimed regions to the beginning of the region free list, not the end
tonyp
parents:
2369
diff
changeset
|
5749 free_list->add_as_head(hr); |
2152 | 5750 } |
5751 | |
5752 void G1CollectedHeap::free_humongous_region(HeapRegion* hr, | |
5753 size_t* pre_used, | |
5754 FreeRegionList* free_list, | |
5755 HumongousRegionSet* humongous_proxy_set, | |
5756 bool par) { | |
5757 assert(hr->startsHumongous(), "this is only for starts humongous regions"); | |
5758 assert(free_list != NULL, "pre-condition"); | |
5759 assert(humongous_proxy_set != NULL, "pre-condition"); | |
5760 | |
5761 size_t hr_used = hr->used(); | |
5762 size_t hr_capacity = hr->capacity(); | |
5763 size_t hr_pre_used = 0; | |
5764 _humongous_set.remove_with_proxy(hr, humongous_proxy_set); | |
6254
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
5765 // 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
|
5766 // otherwise the information will be gone. |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
5767 uint last_index = hr->last_hc_index(); |
2152 | 5768 hr->set_notHumongous(); |
5769 free_region(hr, &hr_pre_used, free_list, par); | |
5770 | |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
5771 uint i = hr->hrs_index() + 1; |
6254
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
5772 while (i < last_index) { |
3766 | 5773 HeapRegion* curr_hr = region_at(i); |
6254
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
5774 assert(curr_hr->continuesHumongous(), "invariant"); |
2152 | 5775 curr_hr->set_notHumongous(); |
5776 free_region(curr_hr, &hr_pre_used, free_list, par); | |
5777 i += 1; | |
5778 } | |
5779 assert(hr_pre_used == hr_used, | |
5780 err_msg("hr_pre_used: "SIZE_FORMAT" and hr_used: "SIZE_FORMAT" " | |
5781 "should be the same", hr_pre_used, hr_used)); | |
5782 *pre_used += hr_pre_used; | |
5783 } | |
5784 | |
5785 void G1CollectedHeap::update_sets_after_freeing_regions(size_t pre_used, | |
5786 FreeRegionList* free_list, | |
4072 | 5787 OldRegionSet* old_proxy_set, |
2152 | 5788 HumongousRegionSet* humongous_proxy_set, |
5789 bool par) { | |
5790 if (pre_used > 0) { | |
5791 Mutex* lock = (par) ? ParGCRareEvent_lock : NULL; | |
342 | 5792 MutexLockerEx x(lock, Mutex::_no_safepoint_check_flag); |
2152 | 5793 assert(_summary_bytes_used >= pre_used, |
5794 err_msg("invariant: _summary_bytes_used: "SIZE_FORMAT" " | |
5795 "should be >= pre_used: "SIZE_FORMAT, | |
5796 _summary_bytes_used, pre_used)); | |
342 | 5797 _summary_bytes_used -= pre_used; |
2152 | 5798 } |
5799 if (free_list != NULL && !free_list->is_empty()) { | |
5800 MutexLockerEx x(FreeList_lock, Mutex::_no_safepoint_check_flag); | |
2432
455328d90876
7029458: G1: Add newly-reclaimed regions to the beginning of the region free list, not the end
tonyp
parents:
2369
diff
changeset
|
5801 _free_list.add_as_head(free_list); |
2152 | 5802 } |
4072 | 5803 if (old_proxy_set != NULL && !old_proxy_set->is_empty()) { |
5804 MutexLockerEx x(OldSets_lock, Mutex::_no_safepoint_check_flag); | |
5805 _old_set.update_from_proxy(old_proxy_set); | |
5806 } | |
2152 | 5807 if (humongous_proxy_set != NULL && !humongous_proxy_set->is_empty()) { |
5808 MutexLockerEx x(OldSets_lock, Mutex::_no_safepoint_check_flag); | |
5809 _humongous_set.update_from_proxy(humongous_proxy_set); | |
342 | 5810 } |
5811 } | |
5812 | |
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
5813 class G1ParCleanupCTTask : public AbstractGangTask { |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
5814 CardTableModRefBS* _ct_bs; |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
5815 G1CollectedHeap* _g1h; |
940
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
5816 HeapRegion* volatile _su_head; |
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
5817 public: |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
5818 G1ParCleanupCTTask(CardTableModRefBS* ct_bs, |
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
5819 G1CollectedHeap* g1h) : |
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
5820 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
|
5821 _ct_bs(ct_bs), _g1h(g1h) { } |
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
5822 |
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
5823 void work(uint worker_id) { |
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
5824 HeapRegion* r; |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
5825 while (r = _g1h->pop_dirty_cards_region()) { |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
5826 clear_cards(r); |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
5827 } |
940
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
5828 } |
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
5829 |
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
5830 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
|
5831 // 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
|
5832 if (!r->is_survivor()) { |
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
5833 _ct_bs->clear(MemRegion(r->bottom(), r->end())); |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
5834 } |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
5835 } |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
5836 }; |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
5837 |
940
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
5838 #ifndef PRODUCT |
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
5839 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
|
5840 G1CollectedHeap* _g1h; |
940
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
5841 CardTableModRefBS* _ct_bs; |
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
5842 public: |
3317
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
5843 G1VerifyCardTableCleanup(G1CollectedHeap* g1h, CardTableModRefBS* ct_bs) |
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
5844 : _g1h(g1h), _ct_bs(ct_bs) { } |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
5845 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
|
5846 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
|
5847 _g1h->verify_dirty_region(r); |
940
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
5848 } else { |
3317
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
5849 _g1h->verify_not_dirty_region(r); |
940
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
5850 } |
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
5851 return false; |
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
5852 } |
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
5853 }; |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
5854 |
3317
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
5855 void G1CollectedHeap::verify_not_dirty_region(HeapRegion* hr) { |
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
5856 // All of the region should be clean. |
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
5857 CardTableModRefBS* ct_bs = (CardTableModRefBS*)barrier_set(); |
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
5858 MemRegion mr(hr->bottom(), hr->end()); |
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
5859 ct_bs->verify_not_dirty_region(mr); |
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
5860 } |
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
5861 |
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
5862 void G1CollectedHeap::verify_dirty_region(HeapRegion* hr) { |
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
5863 // We cannot guarantee that [bottom(),end()] is dirty. Threads |
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
5864 // dirty allocated blocks as they allocate them. The thread that |
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
5865 // retires each region and replaces it with a new one will do a |
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
5866 // maximal allocation to fill in [pre_dummy_top(),end()] but will |
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
5867 // not dirty that area (one less thing to have to do while holding |
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
5868 // a lock). So we can only verify that [bottom(),pre_dummy_top()] |
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
5869 // is dirty. |
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
5870 CardTableModRefBS* ct_bs = (CardTableModRefBS*) barrier_set(); |
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
5871 MemRegion mr(hr->bottom(), hr->pre_dummy_top()); |
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
5872 ct_bs->verify_dirty_region(mr); |
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
5873 } |
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
5874 |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
5875 void G1CollectedHeap::verify_dirty_young_list(HeapRegion* head) { |
3317
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
5876 CardTableModRefBS* ct_bs = (CardTableModRefBS*) barrier_set(); |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
5877 for (HeapRegion* hr = head; hr != NULL; hr = hr->get_next_young_region()) { |
3317
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
5878 verify_dirty_region(hr); |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
5879 } |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
5880 } |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
5881 |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
5882 void G1CollectedHeap::verify_dirty_young_regions() { |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
5883 verify_dirty_young_list(_young_list->first_region()); |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
5884 } |
940
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
5885 #endif |
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
5886 |
342 | 5887 void G1CollectedHeap::cleanUpCardTable() { |
5888 CardTableModRefBS* ct_bs = (CardTableModRefBS*) (barrier_set()); | |
5889 double start = os::elapsedTime(); | |
5890 | |
4023 | 5891 { |
5892 // Iterate over the dirty cards region list. | |
5893 G1ParCleanupCTTask cleanup_task(ct_bs, this); | |
5894 | |
4711 | 5895 if (G1CollectedHeap::use_parallel_gc_threads()) { |
5896 set_par_threads(); | |
4023 | 5897 workers()->run_task(&cleanup_task); |
5898 set_par_threads(0); | |
5899 } else { | |
5900 while (_dirty_cards_region_list) { | |
5901 HeapRegion* r = _dirty_cards_region_list; | |
5902 cleanup_task.clear_cards(r); | |
5903 _dirty_cards_region_list = r->get_next_dirty_cards_region(); | |
5904 if (_dirty_cards_region_list == r) { | |
5905 // The last region. | |
5906 _dirty_cards_region_list = NULL; | |
5907 } | |
5908 r->set_next_dirty_cards_region(NULL); | |
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
5909 } |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
5910 } |
4023 | 5911 #ifndef PRODUCT |
5912 if (G1VerifyCTCleanup || VerifyAfterGC) { | |
5913 G1VerifyCardTableCleanup cleanup_verifier(this, ct_bs); | |
5914 heap_region_iterate(&cleanup_verifier); | |
5915 } | |
5916 #endif | |
940
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
5917 } |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
5918 |
342 | 5919 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
|
5920 g1_policy()->phase_times()->record_clear_ct_time(elapsed * 1000.0); |
342 | 5921 } |
5922 | |
5923 void G1CollectedHeap::free_collection_set(HeapRegion* cs_head) { | |
2152 | 5924 size_t pre_used = 0; |
5925 FreeRegionList local_free_list("Local List for CSet Freeing"); | |
5926 | |
342 | 5927 double young_time_ms = 0.0; |
5928 double non_young_time_ms = 0.0; | |
5929 | |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
5930 // Since the collection set is a superset of the the young list, |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
5931 // all we need to do to clear the young list is clear its |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
5932 // head and length, and unlink any young regions in the code below |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
5933 _young_list->clear(); |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
5934 |
342 | 5935 G1CollectorPolicy* policy = g1_policy(); |
5936 | |
5937 double start_sec = os::elapsedTime(); | |
5938 bool non_young = true; | |
5939 | |
5940 HeapRegion* cur = cs_head; | |
5941 int age_bound = -1; | |
5942 size_t rs_lengths = 0; | |
5943 | |
5944 while (cur != NULL) { | |
2361 | 5945 assert(!is_on_master_free_list(cur), "sanity"); |
342 | 5946 if (non_young) { |
5947 if (cur->is_young()) { | |
5948 double end_sec = os::elapsedTime(); | |
5949 double elapsed_ms = (end_sec - start_sec) * 1000.0; | |
5950 non_young_time_ms += elapsed_ms; | |
5951 | |
5952 start_sec = os::elapsedTime(); | |
5953 non_young = false; | |
5954 } | |
5955 } else { | |
4097
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
5956 if (!cur->is_young()) { |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
5957 double end_sec = os::elapsedTime(); |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
5958 double elapsed_ms = (end_sec - start_sec) * 1000.0; |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
5959 young_time_ms += elapsed_ms; |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
5960 |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
5961 start_sec = os::elapsedTime(); |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
5962 non_young = true; |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
5963 } |
342 | 5964 } |
5965 | |
5966 rs_lengths += cur->rem_set()->occupied(); | |
5967 | |
5968 HeapRegion* next = cur->next_in_collection_set(); | |
5969 assert(cur->in_collection_set(), "bad CS"); | |
5970 cur->set_next_in_collection_set(NULL); | |
5971 cur->set_in_collection_set(false); | |
5972 | |
5973 if (cur->is_young()) { | |
5974 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
|
5975 assert(index != -1, "invariant"); |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
5976 assert((uint) index < policy->young_cset_region_length(), "invariant"); |
342 | 5977 size_t words_survived = _surviving_young_words[index]; |
5978 cur->record_surv_words_in_group(words_survived); | |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
5979 |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
5980 // 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
changeset
|
5981 // (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
|
5982 // 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
|
5983 // _next_young_region field. |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
5984 cur->set_next_young_region(NULL); |
342 | 5985 } else { |
5986 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
|
5987 assert(index == -1, "invariant"); |
342 | 5988 } |
5989 | |
5990 assert( (cur->is_young() && cur->young_index_in_cset() > -1) || | |
5991 (!cur->is_young() && cur->young_index_in_cset() == -1), | |
5992 "invariant" ); | |
5993 | |
5994 if (!cur->evacuation_failed()) { | |
4097
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
5995 MemRegion used_mr = cur->used_region(); |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
5996 |
342 | 5997 // And the region is empty. |
4097
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
5998 assert(!used_mr.is_empty(), "Should not have empty regions in a CS."); |
2152 | 5999 free_region(cur, &pre_used, &local_free_list, false /* par */); |
342 | 6000 } else { |
6001 cur->uninstall_surv_rate_group(); | |
4090
a88de71c4e3a
7097002: G1: remove a lot of unused / redundant code from the G1CollectorPolicy class
tonyp
parents:
4073
diff
changeset
|
6002 if (cur->is_young()) { |
342 | 6003 cur->set_young_index_in_cset(-1); |
4090
a88de71c4e3a
7097002: G1: remove a lot of unused / redundant code from the G1CollectorPolicy class
tonyp
parents:
4073
diff
changeset
|
6004 } |
342 | 6005 cur->set_not_young(); |
6006 cur->set_evacuation_failed(false); | |
4072 | 6007 // The region is now considered to be old. |
6008 _old_set.add(cur); | |
342 | 6009 } |
6010 cur = next; | |
6011 } | |
6012 | |
6013 policy->record_max_rs_lengths(rs_lengths); | |
6014 policy->cset_regions_freed(); | |
6015 | |
6016 double end_sec = os::elapsedTime(); | |
6017 double elapsed_ms = (end_sec - start_sec) * 1000.0; | |
4097
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
6018 |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
6019 if (non_young) { |
342 | 6020 non_young_time_ms += elapsed_ms; |
4097
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
6021 } else { |
342 | 6022 young_time_ms += elapsed_ms; |
4097
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
6023 } |
342 | 6024 |
2152 | 6025 update_sets_after_freeing_regions(pre_used, &local_free_list, |
4072 | 6026 NULL /* old_proxy_set */, |
2152 | 6027 NULL /* humongous_proxy_set */, |
6028 false /* par */); | |
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
6029 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
|
6030 policy->phase_times()->record_non_young_free_cset_time_ms(non_young_time_ms); |
342 | 6031 } |
6032 | |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
6033 // 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
parents:
1391
diff
changeset
|
6034 // 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
parents:
1391
diff
changeset
|
6035 // 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
parents:
1391
diff
changeset
|
6036 // full collection. After the full GC we will start to build up |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
6037 // 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
|
6038 // 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
|
6039 // and is immediately followed by the tearing down of the young list. |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
6040 |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
6041 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
|
6042 HeapRegion* cur = cs_head; |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
6043 |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
6044 while (cur != NULL) { |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
6045 HeapRegion* next = cur->next_in_collection_set(); |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
6046 assert(cur->in_collection_set(), "bad CS"); |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
6047 cur->set_next_in_collection_set(NULL); |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
6048 cur->set_in_collection_set(false); |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
6049 cur->set_young_index_in_cset(-1); |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
6050 cur = next; |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
6051 } |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
6052 } |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
6053 |
2152 | 6054 void G1CollectedHeap::set_free_regions_coming() { |
6055 if (G1ConcRegionFreeingVerbose) { | |
6056 gclog_or_tty->print_cr("G1ConcRegionFreeing [cm thread] : " | |
6057 "setting free regions coming"); | |
6058 } | |
6059 | |
6060 assert(!free_regions_coming(), "pre-condition"); | |
6061 _free_regions_coming = true; | |
342 | 6062 } |
6063 | |
2152 | 6064 void G1CollectedHeap::reset_free_regions_coming() { |
4837
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
6065 assert(free_regions_coming(), "pre-condition"); |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
6066 |
2152 | 6067 { |
6068 MutexLockerEx x(SecondaryFreeList_lock, Mutex::_no_safepoint_check_flag); | |
6069 _free_regions_coming = false; | |
6070 SecondaryFreeList_lock->notify_all(); | |
6071 } | |
6072 | |
6073 if (G1ConcRegionFreeingVerbose) { | |
6074 gclog_or_tty->print_cr("G1ConcRegionFreeing [cm thread] : " | |
6075 "reset free regions coming"); | |
342 | 6076 } |
6077 } | |
6078 | |
2152 | 6079 void G1CollectedHeap::wait_while_free_regions_coming() { |
6080 // Most of the time we won't have to wait, so let's do a quick test | |
6081 // first before we take the lock. | |
6082 if (!free_regions_coming()) { | |
6083 return; | |
6084 } | |
6085 | |
6086 if (G1ConcRegionFreeingVerbose) { | |
6087 gclog_or_tty->print_cr("G1ConcRegionFreeing [other] : " | |
6088 "waiting for free regions"); | |
342 | 6089 } |
6090 | |
6091 { | |
2152 | 6092 MutexLockerEx x(SecondaryFreeList_lock, Mutex::_no_safepoint_check_flag); |
6093 while (free_regions_coming()) { | |
6094 SecondaryFreeList_lock->wait(Mutex::_no_safepoint_check_flag); | |
342 | 6095 } |
2152 | 6096 } |
6097 | |
6098 if (G1ConcRegionFreeingVerbose) { | |
6099 gclog_or_tty->print_cr("G1ConcRegionFreeing [other] : " | |
6100 "done waiting for free regions"); | |
6101 } | |
342 | 6102 } |
6103 | |
6104 void G1CollectedHeap::set_region_short_lived_locked(HeapRegion* hr) { | |
6105 assert(heap_lock_held_for_gc(), | |
6106 "the heap lock should already be held by or for this thread"); | |
6107 _young_list->push_region(hr); | |
6108 } | |
6109 | |
6110 class NoYoungRegionsClosure: public HeapRegionClosure { | |
6111 private: | |
6112 bool _success; | |
6113 public: | |
6114 NoYoungRegionsClosure() : _success(true) { } | |
6115 bool doHeapRegion(HeapRegion* r) { | |
6116 if (r->is_young()) { | |
6117 gclog_or_tty->print_cr("Region ["PTR_FORMAT", "PTR_FORMAT") tagged as young", | |
6118 r->bottom(), r->end()); | |
6119 _success = false; | |
6120 } | |
6121 return false; | |
6122 } | |
6123 bool success() { return _success; } | |
6124 }; | |
6125 | |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
6126 bool G1CollectedHeap::check_young_list_empty(bool check_heap, bool check_sample) { |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
6127 bool ret = _young_list->check_list_empty(check_sample); |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
6128 |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
6129 if (check_heap) { |
342 | 6130 NoYoungRegionsClosure closure; |
6131 heap_region_iterate(&closure); | |
6132 ret = ret && closure.success(); | |
6133 } | |
6134 | |
6135 return ret; | |
6136 } | |
6137 | |
4072 | 6138 class TearDownRegionSetsClosure : public HeapRegionClosure { |
6139 private: | |
6140 OldRegionSet *_old_set; | |
2152 | 6141 |
342 | 6142 public: |
4072 | 6143 TearDownRegionSetsClosure(OldRegionSet* old_set) : _old_set(old_set) { } |
2152 | 6144 |
342 | 6145 bool doHeapRegion(HeapRegion* r) { |
4072 | 6146 if (r->is_empty()) { |
6147 // We ignore empty regions, we'll empty the free list afterwards | |
6148 } else if (r->is_young()) { | |
6149 // We ignore young regions, we'll empty the young list afterwards | |
6150 } else if (r->isHumongous()) { | |
6151 // We ignore humongous regions, we're not tearing down the | |
6152 // humongous region set | |
342 | 6153 } else { |
4072 | 6154 // The rest should be old |
6155 _old_set->remove(r); | |
342 | 6156 } |
6157 return false; | |
6158 } | |
6159 | |
4072 | 6160 ~TearDownRegionSetsClosure() { |
6161 assert(_old_set->is_empty(), "post-condition"); | |
2152 | 6162 } |
342 | 6163 }; |
6164 | |
4072 | 6165 void G1CollectedHeap::tear_down_region_sets(bool free_list_only) { |
6166 assert_at_safepoint(true /* should_be_vm_thread */); | |
6167 | |
6168 if (!free_list_only) { | |
6169 TearDownRegionSetsClosure cl(&_old_set); | |
6170 heap_region_iterate(&cl); | |
6171 | |
6172 // Need to do this after the heap iteration to be able to | |
6173 // recognize the young regions and ignore them during the iteration. | |
6174 _young_list->empty_list(); | |
6175 } | |
6176 _free_list.remove_all(); | |
6177 } | |
6178 | |
6179 class RebuildRegionSetsClosure : public HeapRegionClosure { | |
6180 private: | |
6181 bool _free_list_only; | |
6182 OldRegionSet* _old_set; | |
6183 FreeRegionList* _free_list; | |
6184 size_t _total_used; | |
6185 | |
6186 public: | |
6187 RebuildRegionSetsClosure(bool free_list_only, | |
6188 OldRegionSet* old_set, FreeRegionList* free_list) : | |
6189 _free_list_only(free_list_only), | |
6190 _old_set(old_set), _free_list(free_list), _total_used(0) { | |
6191 assert(_free_list->is_empty(), "pre-condition"); | |
6192 if (!free_list_only) { | |
6193 assert(_old_set->is_empty(), "pre-condition"); | |
6194 } | |
6195 } | |
6196 | |
6197 bool doHeapRegion(HeapRegion* r) { | |
6198 if (r->continuesHumongous()) { | |
6199 return false; | |
6200 } | |
6201 | |
6202 if (r->is_empty()) { | |
6203 // Add free regions to the free list | |
6204 _free_list->add_as_tail(r); | |
6205 } else if (!_free_list_only) { | |
6206 assert(!r->is_young(), "we should not come across young regions"); | |
6207 | |
6208 if (r->isHumongous()) { | |
6209 // We ignore humongous regions, we left the humongous set unchanged | |
6210 } else { | |
6211 // The rest should be old, add them to the old set | |
6212 _old_set->add(r); | |
6213 } | |
6214 _total_used += r->used(); | |
6215 } | |
6216 | |
6217 return false; | |
6218 } | |
6219 | |
6220 size_t total_used() { | |
6221 return _total_used; | |
6222 } | |
6223 }; | |
6224 | |
6225 void G1CollectedHeap::rebuild_region_sets(bool free_list_only) { | |
6226 assert_at_safepoint(true /* should_be_vm_thread */); | |
6227 | |
6228 RebuildRegionSetsClosure cl(free_list_only, &_old_set, &_free_list); | |
6229 heap_region_iterate(&cl); | |
6230 | |
6231 if (!free_list_only) { | |
6232 _summary_bytes_used = cl.total_used(); | |
6233 } | |
6234 assert(_summary_bytes_used == recalculate_used(), | |
6235 err_msg("inconsistent _summary_bytes_used, " | |
6236 "value: "SIZE_FORMAT" recalculated: "SIZE_FORMAT, | |
6237 _summary_bytes_used, recalculate_used())); | |
342 | 6238 } |
6239 | |
6240 void G1CollectedHeap::set_refine_cte_cl_concurrency(bool concurrent) { | |
6241 _refine_cte_cl->set_concurrent(concurrent); | |
6242 } | |
6243 | |
6244 bool G1CollectedHeap::is_in_closed_subset(const void* p) const { | |
6245 HeapRegion* hr = heap_region_containing(p); | |
6246 if (hr == NULL) { | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
6247 return false; |
342 | 6248 } else { |
6249 return hr->is_in(p); | |
6250 } | |
6251 } | |
2152 | 6252 |
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6253 // 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
|
6254 |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6255 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
|
6256 bool force) { |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6257 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
|
6258 assert(!force || g1_policy()->can_expand_young_list(), |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6259 "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
|
6260 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
|
6261 if (force || !young_list_full) { |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6262 HeapRegion* new_alloc_region = new_region(word_size, |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6263 false /* do_expand */); |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6264 if (new_alloc_region != NULL) { |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6265 set_region_short_lived_locked(new_alloc_region); |
3778
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
6266 _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
|
6267 return new_alloc_region; |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6268 } |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6269 } |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6270 return NULL; |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6271 } |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6272 |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6273 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
|
6274 size_t allocated_bytes) { |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6275 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
|
6276 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
|
6277 |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6278 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
|
6279 _summary_bytes_used += allocated_bytes; |
3778
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
6280 _hr_printer.retire(alloc_region); |
3980
8229bd737950
7075646: G1: fix inconsistencies in the monitoring data
tonyp
parents:
3979
diff
changeset
|
6281 // 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
|
6282 // 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
|
6283 // used space has been recored in _summary_bytes_used. |
8229bd737950
7075646: G1: fix inconsistencies in the monitoring data
tonyp
parents:
3979
diff
changeset
|
6284 g1mm()->update_eden_size(); |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6285 } |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6286 |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6287 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
|
6288 bool force) { |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6289 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
|
6290 } |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6291 |
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6292 void G1CollectedHeap::set_par_threads() { |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6293 // 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
|
6294 // in the workgroup. |
4711 | 6295 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
|
6296 uint n_workers = workers()->active_workers(); |
4711 | 6297 assert(UseDynamicNumberOfGCThreads || |
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6298 n_workers == workers()->total_workers(), |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6299 "Otherwise should be using the total number of workers"); |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6300 if (n_workers == 0) { |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6301 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
|
6302 n_workers = ParallelGCThreads; |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6303 workers()->set_active_workers(n_workers); |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6304 } |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6305 set_par_threads(n_workers); |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6306 } |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6307 |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6308 void MutatorAllocRegion::retire_region(HeapRegion* alloc_region, |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6309 size_t allocated_bytes) { |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6310 _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
|
6311 } |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6312 |
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6313 // 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
|
6314 |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6315 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
|
6316 uint count, |
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6317 GCAllocPurpose ap) { |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6318 assert(FreeList_lock->owned_by_self(), "pre-condition"); |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6319 |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6320 if (count < g1_policy()->max_regions(ap)) { |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6321 HeapRegion* new_alloc_region = new_region(word_size, |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6322 true /* do_expand */); |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6323 if (new_alloc_region != NULL) { |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6324 // We really only need to do this for old regions given that we |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6325 // should never scan survivors. But it doesn't hurt to do it |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6326 // for survivors too. |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6327 new_alloc_region->set_saved_mark(); |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6328 if (ap == GCAllocForSurvived) { |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6329 new_alloc_region->set_survivor(); |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6330 _hr_printer.alloc(new_alloc_region, G1HRPrinter::Survivor); |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6331 } else { |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6332 _hr_printer.alloc(new_alloc_region, G1HRPrinter::Old); |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6333 } |
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
6334 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
|
6335 new_alloc_region->note_start_of_copying(during_im); |
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6336 return new_alloc_region; |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6337 } else { |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6338 g1_policy()->note_alloc_region_limit_reached(ap); |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6339 } |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6340 } |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6341 return NULL; |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6342 } |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6343 |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6344 void G1CollectedHeap::retire_gc_alloc_region(HeapRegion* alloc_region, |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6345 size_t allocated_bytes, |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6346 GCAllocPurpose ap) { |
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
6347 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
|
6348 alloc_region->note_end_of_copying(during_im); |
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6349 g1_policy()->record_bytes_copied_during_gc(allocated_bytes); |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6350 if (ap == GCAllocForSurvived) { |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6351 young_list()->add_survivor_region(alloc_region); |
4072 | 6352 } else { |
6353 _old_set.add(alloc_region); | |
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6354 } |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6355 _hr_printer.retire(alloc_region); |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6356 } |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6357 |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6358 HeapRegion* SurvivorGCAllocRegion::allocate_new_region(size_t word_size, |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6359 bool force) { |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6360 assert(!force, "not supported for GC alloc regions"); |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6361 return _g1h->new_gc_alloc_region(word_size, count(), GCAllocForSurvived); |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6362 } |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6363 |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6364 void SurvivorGCAllocRegion::retire_region(HeapRegion* alloc_region, |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6365 size_t allocated_bytes) { |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6366 _g1h->retire_gc_alloc_region(alloc_region, allocated_bytes, |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6367 GCAllocForSurvived); |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6368 } |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6369 |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6370 HeapRegion* OldGCAllocRegion::allocate_new_region(size_t word_size, |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6371 bool force) { |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6372 assert(!force, "not supported for GC alloc regions"); |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6373 return _g1h->new_gc_alloc_region(word_size, count(), GCAllocForTenured); |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6374 } |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6375 |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6376 void OldGCAllocRegion::retire_region(HeapRegion* alloc_region, |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6377 size_t allocated_bytes) { |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6378 _g1h->retire_gc_alloc_region(alloc_region, allocated_bytes, |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6379 GCAllocForTenured); |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6380 } |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6381 // Heap region set verification |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6382 |
2152 | 6383 class VerifyRegionListsClosure : public HeapRegionClosure { |
6384 private: | |
4072 | 6385 FreeRegionList* _free_list; |
6386 OldRegionSet* _old_set; | |
2152 | 6387 HumongousRegionSet* _humongous_set; |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
6388 uint _region_count; |
2152 | 6389 |
6390 public: | |
4072 | 6391 VerifyRegionListsClosure(OldRegionSet* old_set, |
6392 HumongousRegionSet* humongous_set, | |
2152 | 6393 FreeRegionList* free_list) : |
4072 | 6394 _old_set(old_set), _humongous_set(humongous_set), |
6395 _free_list(free_list), _region_count(0) { } | |
2152 | 6396 |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
6397 uint region_count() { return _region_count; } |
2152 | 6398 |
6399 bool doHeapRegion(HeapRegion* hr) { | |
6400 _region_count += 1; | |
6401 | |
6402 if (hr->continuesHumongous()) { | |
6403 return false; | |
6404 } | |
6405 | |
6406 if (hr->is_young()) { | |
6407 // TODO | |
6408 } else if (hr->startsHumongous()) { | |
6409 _humongous_set->verify_next_region(hr); | |
6410 } else if (hr->is_empty()) { | |
6411 _free_list->verify_next_region(hr); | |
4072 | 6412 } else { |
6413 _old_set->verify_next_region(hr); | |
2152 | 6414 } |
6415 return false; | |
6416 } | |
6417 }; | |
6418 | |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
6419 HeapRegion* G1CollectedHeap::new_heap_region(uint hrs_index, |
3766 | 6420 HeapWord* bottom) { |
6421 HeapWord* end = bottom + HeapRegion::GrainWords; | |
6422 MemRegion mr(bottom, end); | |
6423 assert(_g1_reserved.contains(mr), "invariant"); | |
6424 // 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
|
6425 return new HeapRegion(hrs_index, _bot_shared, mr); |
3766 | 6426 } |
6427 | |
2152 | 6428 void G1CollectedHeap::verify_region_sets() { |
6429 assert_heap_locked_or_at_safepoint(true /* should_be_vm_thread */); | |
6430 | |
6431 // First, check the explicit lists. | |
6432 _free_list.verify(); | |
6433 { | |
6434 // Given that a concurrent operation might be adding regions to | |
6435 // the secondary free list we have to take the lock before | |
6436 // verifying it. | |
6437 MutexLockerEx x(SecondaryFreeList_lock, Mutex::_no_safepoint_check_flag); | |
6438 _secondary_free_list.verify(); | |
6439 } | |
4072 | 6440 _old_set.verify(); |
2152 | 6441 _humongous_set.verify(); |
6442 | |
6443 // If a concurrent region freeing operation is in progress it will | |
6444 // be difficult to correctly attributed any free regions we come | |
6445 // across to the correct free list given that they might belong to | |
6446 // one of several (free_list, secondary_free_list, any local lists, | |
6447 // etc.). So, if that's the case we will skip the rest of the | |
6448 // verification operation. Alternatively, waiting for the concurrent | |
6449 // operation to complete will have a non-trivial effect on the GC's | |
6450 // operation (no concurrent operation will last longer than the | |
6451 // interval between two calls to verification) and it might hide | |
6452 // any issues that we would like to catch during testing. | |
6453 if (free_regions_coming()) { | |
6454 return; | |
6455 } | |
6456 | |
2361 | 6457 // Make sure we append the secondary_free_list on the free_list so |
6458 // that all free regions we will come across can be safely | |
6459 // attributed to the free_list. | |
6460 append_secondary_free_list_if_not_empty_with_lock(); | |
2152 | 6461 |
6462 // Finally, make sure that the region accounting in the lists is | |
6463 // consistent with what we see in the heap. | |
4072 | 6464 _old_set.verify_start(); |
2152 | 6465 _humongous_set.verify_start(); |
6466 _free_list.verify_start(); | |
6467 | |
4072 | 6468 VerifyRegionListsClosure cl(&_old_set, &_humongous_set, &_free_list); |
2152 | 6469 heap_region_iterate(&cl); |
6470 | |
4072 | 6471 _old_set.verify_end(); |
2152 | 6472 _humongous_set.verify_end(); |
6473 _free_list.verify_end(); | |
342 | 6474 } |