Mercurial > hg > truffle
annotate src/share/vm/gc_implementation/g1/g1CollectedHeap.cpp @ 1707:0ce1569c90e5
6963209: G1: remove the concept of abandoned pauses
Summary: As part of 6944166 we disabled the concept of abandoned pauses (i.e., if the collection set is empty, we would still try to do a pause even if it is to update the RSets and scan the roots). This changeset removes the code and structures associated with abandoned pauses.
Reviewed-by: iveresov, johnc
author | tonyp |
---|---|
date | Wed, 04 Aug 2010 13:03:23 -0400 |
parents | 2d160770d2e5 |
children | 5f429ee79634 |
rev | line source |
---|---|
342 | 1 /* |
1552
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
trims
parents:
1547
diff
changeset
|
2 * Copyright (c) 2001, 2010, 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 | |
25 #include "incls/_precompiled.incl" | |
26 #include "incls/_g1CollectedHeap.cpp.incl" | |
27 | |
942
2c79770d1f6e
6819085: G1: use larger and/or user settable region size
tonyp
parents:
941
diff
changeset
|
28 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
|
29 |
342 | 30 // turn it on so that the contents of the young list (scan-only / |
31 // to-be-collected) are printed at "strategic" points before / during | |
32 // / 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
|
33 #define YOUNG_LIST_VERBOSE 0 |
342 | 34 // CURRENT STATUS |
35 // This file is under construction. Search for "FIXME". | |
36 | |
37 // INVARIANTS/NOTES | |
38 // | |
39 // All allocation activity covered by the G1CollectedHeap interface is | |
40 // serialized by acquiring the HeapLock. This happens in | |
41 // mem_allocate_work, which all such allocation functions call. | |
42 // (Note that this does not apply to TLAB allocation, which is not part | |
43 // of this interface: it is done by clients of this interface.) | |
44 | |
45 // Local to this file. | |
46 | |
47 class RefineCardTableEntryClosure: public CardTableEntryClosure { | |
48 SuspendibleThreadSet* _sts; | |
49 G1RemSet* _g1rs; | |
50 ConcurrentG1Refine* _cg1r; | |
51 bool _concurrent; | |
52 public: | |
53 RefineCardTableEntryClosure(SuspendibleThreadSet* sts, | |
54 G1RemSet* g1rs, | |
55 ConcurrentG1Refine* cg1r) : | |
56 _sts(sts), _g1rs(g1rs), _cg1r(cg1r), _concurrent(true) | |
57 {} | |
58 bool do_card_ptr(jbyte* card_ptr, int worker_i) { | |
1705 | 59 bool oops_into_cset = _g1rs->concurrentRefineOneCard(card_ptr, worker_i, false); |
60 // This path is executed by the concurrent refine or mutator threads, | |
61 // concurrently, and so we do not care if card_ptr contains references | |
62 // that point into the collection set. | |
63 assert(!oops_into_cset, "should be"); | |
64 | |
342 | 65 if (_concurrent && _sts->should_yield()) { |
66 // Caller will actually yield. | |
67 return false; | |
68 } | |
69 // Otherwise, we finished successfully; return true. | |
70 return true; | |
71 } | |
72 void set_concurrent(bool b) { _concurrent = b; } | |
73 }; | |
74 | |
75 | |
76 class ClearLoggedCardTableEntryClosure: public CardTableEntryClosure { | |
77 int _calls; | |
78 G1CollectedHeap* _g1h; | |
79 CardTableModRefBS* _ctbs; | |
80 int _histo[256]; | |
81 public: | |
82 ClearLoggedCardTableEntryClosure() : | |
83 _calls(0) | |
84 { | |
85 _g1h = G1CollectedHeap::heap(); | |
86 _ctbs = (CardTableModRefBS*)_g1h->barrier_set(); | |
87 for (int i = 0; i < 256; i++) _histo[i] = 0; | |
88 } | |
89 bool do_card_ptr(jbyte* card_ptr, int worker_i) { | |
90 if (_g1h->is_in_reserved(_ctbs->addr_for(card_ptr))) { | |
91 _calls++; | |
92 unsigned char* ujb = (unsigned char*)card_ptr; | |
93 int ind = (int)(*ujb); | |
94 _histo[ind]++; | |
95 *card_ptr = -1; | |
96 } | |
97 return true; | |
98 } | |
99 int calls() { return _calls; } | |
100 void print_histo() { | |
101 gclog_or_tty->print_cr("Card table value histogram:"); | |
102 for (int i = 0; i < 256; i++) { | |
103 if (_histo[i] != 0) { | |
104 gclog_or_tty->print_cr(" %d: %d", i, _histo[i]); | |
105 } | |
106 } | |
107 } | |
108 }; | |
109 | |
110 class RedirtyLoggedCardTableEntryClosure: public CardTableEntryClosure { | |
111 int _calls; | |
112 G1CollectedHeap* _g1h; | |
113 CardTableModRefBS* _ctbs; | |
114 public: | |
115 RedirtyLoggedCardTableEntryClosure() : | |
116 _calls(0) | |
117 { | |
118 _g1h = G1CollectedHeap::heap(); | |
119 _ctbs = (CardTableModRefBS*)_g1h->barrier_set(); | |
120 } | |
121 bool do_card_ptr(jbyte* card_ptr, int worker_i) { | |
122 if (_g1h->is_in_reserved(_ctbs->addr_for(card_ptr))) { | |
123 _calls++; | |
124 *card_ptr = 0; | |
125 } | |
126 return true; | |
127 } | |
128 int calls() { return _calls; } | |
129 }; | |
130 | |
616
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
131 class RedirtyLoggedCardTableEntryFastClosure : public CardTableEntryClosure { |
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
132 public: |
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
133 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
|
134 *card_ptr = CardTableModRefBS::dirty_card_val(); |
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
135 return true; |
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
136 } |
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
137 }; |
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
138 |
342 | 139 YoungList::YoungList(G1CollectedHeap* g1h) |
140 : _g1h(g1h), _head(NULL), | |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
141 _length(0), |
342 | 142 _last_sampled_rs_lengths(0), |
545 | 143 _survivor_head(NULL), _survivor_tail(NULL), _survivor_length(0) |
342 | 144 { |
145 guarantee( check_list_empty(false), "just making sure..." ); | |
146 } | |
147 | |
148 void YoungList::push_region(HeapRegion *hr) { | |
149 assert(!hr->is_young(), "should not already be young"); | |
150 assert(hr->get_next_young_region() == NULL, "cause it should!"); | |
151 | |
152 hr->set_next_young_region(_head); | |
153 _head = hr; | |
154 | |
155 hr->set_young(); | |
156 double yg_surv_rate = _g1h->g1_policy()->predict_yg_surv_rate((int)_length); | |
157 ++_length; | |
158 } | |
159 | |
160 void YoungList::add_survivor_region(HeapRegion* hr) { | |
545 | 161 assert(hr->is_survivor(), "should be flagged as survivor region"); |
342 | 162 assert(hr->get_next_young_region() == NULL, "cause it should!"); |
163 | |
164 hr->set_next_young_region(_survivor_head); | |
165 if (_survivor_head == NULL) { | |
545 | 166 _survivor_tail = hr; |
342 | 167 } |
168 _survivor_head = hr; | |
169 | |
170 ++_survivor_length; | |
171 } | |
172 | |
173 void YoungList::empty_list(HeapRegion* list) { | |
174 while (list != NULL) { | |
175 HeapRegion* next = list->get_next_young_region(); | |
176 list->set_next_young_region(NULL); | |
177 list->uninstall_surv_rate_group(); | |
178 list->set_not_young(); | |
179 list = next; | |
180 } | |
181 } | |
182 | |
183 void YoungList::empty_list() { | |
184 assert(check_list_well_formed(), "young list should be well formed"); | |
185 | |
186 empty_list(_head); | |
187 _head = NULL; | |
188 _length = 0; | |
189 | |
190 empty_list(_survivor_head); | |
191 _survivor_head = NULL; | |
545 | 192 _survivor_tail = NULL; |
342 | 193 _survivor_length = 0; |
194 | |
195 _last_sampled_rs_lengths = 0; | |
196 | |
197 assert(check_list_empty(false), "just making sure..."); | |
198 } | |
199 | |
200 bool YoungList::check_list_well_formed() { | |
201 bool ret = true; | |
202 | |
203 size_t length = 0; | |
204 HeapRegion* curr = _head; | |
205 HeapRegion* last = NULL; | |
206 while (curr != NULL) { | |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
207 if (!curr->is_young()) { |
342 | 208 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
|
209 "incorrectly tagged (y: %d, surv: %d)", |
342 | 210 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
|
211 curr->is_young(), curr->is_survivor()); |
342 | 212 ret = false; |
213 } | |
214 ++length; | |
215 last = curr; | |
216 curr = curr->get_next_young_region(); | |
217 } | |
218 ret = ret && (length == _length); | |
219 | |
220 if (!ret) { | |
221 gclog_or_tty->print_cr("### YOUNG LIST seems not well formed!"); | |
222 gclog_or_tty->print_cr("### list has %d entries, _length is %d", | |
223 length, _length); | |
224 } | |
225 | |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
226 return ret; |
342 | 227 } |
228 | |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
229 bool YoungList::check_list_empty(bool check_sample) { |
342 | 230 bool ret = true; |
231 | |
232 if (_length != 0) { | |
233 gclog_or_tty->print_cr("### YOUNG LIST should have 0 length, not %d", | |
234 _length); | |
235 ret = false; | |
236 } | |
237 if (check_sample && _last_sampled_rs_lengths != 0) { | |
238 gclog_or_tty->print_cr("### YOUNG LIST has non-zero last sampled RS lengths"); | |
239 ret = false; | |
240 } | |
241 if (_head != NULL) { | |
242 gclog_or_tty->print_cr("### YOUNG LIST does not have a NULL head"); | |
243 ret = false; | |
244 } | |
245 if (!ret) { | |
246 gclog_or_tty->print_cr("### YOUNG LIST does not seem empty"); | |
247 } | |
248 | |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
249 return ret; |
342 | 250 } |
251 | |
252 void | |
253 YoungList::rs_length_sampling_init() { | |
254 _sampled_rs_lengths = 0; | |
255 _curr = _head; | |
256 } | |
257 | |
258 bool | |
259 YoungList::rs_length_sampling_more() { | |
260 return _curr != NULL; | |
261 } | |
262 | |
263 void | |
264 YoungList::rs_length_sampling_next() { | |
265 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
|
266 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
|
267 |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
268 _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
|
269 |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
270 // 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
|
271 // 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
|
272 // 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
|
273 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
|
274 // 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
|
275 _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
|
276 } |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
277 |
342 | 278 _curr = _curr->get_next_young_region(); |
279 if (_curr == NULL) { | |
280 _last_sampled_rs_lengths = _sampled_rs_lengths; | |
281 // gclog_or_tty->print_cr("last sampled RS lengths = %d", _last_sampled_rs_lengths); | |
282 } | |
283 } | |
284 | |
285 void | |
286 YoungList::reset_auxilary_lists() { | |
287 guarantee( is_empty(), "young list should be empty" ); | |
288 assert(check_list_well_formed(), "young list should be well formed"); | |
289 | |
290 // Add survivor regions to SurvRateGroup. | |
291 _g1h->g1_policy()->note_start_adding_survivor_regions(); | |
545 | 292 _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
|
293 |
342 | 294 for (HeapRegion* curr = _survivor_head; |
295 curr != NULL; | |
296 curr = curr->get_next_young_region()) { | |
297 _g1h->g1_policy()->set_region_survivors(curr); | |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
298 |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
299 // 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
|
300 // 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
|
301 // pause. |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
302 _g1h->g1_policy()->add_region_to_incremental_cset_rhs(curr); |
342 | 303 } |
304 _g1h->g1_policy()->note_stop_adding_survivor_regions(); | |
305 | |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
306 _head = _survivor_head; |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
307 _length = _survivor_length; |
342 | 308 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
|
309 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
|
310 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
|
311 _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
|
312 } |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
313 |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
314 // 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
|
315 // 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
|
316 // 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
|
317 // 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
|
318 |
545 | 319 _g1h->g1_policy()->finished_recalculating_age_indexes(false /* is_survivors */); |
342 | 320 |
321 assert(check_list_well_formed(), "young list should be well formed"); | |
322 } | |
323 | |
324 void YoungList::print() { | |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
325 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
|
326 const char* names[] = {"YOUNG", "SURVIVOR"}; |
342 | 327 |
328 for (unsigned int list = 0; list < ARRAY_SIZE(lists); ++list) { | |
329 gclog_or_tty->print_cr("%s LIST CONTENTS", names[list]); | |
330 HeapRegion *curr = lists[list]; | |
331 if (curr == NULL) | |
332 gclog_or_tty->print_cr(" empty"); | |
333 while (curr != NULL) { | |
334 gclog_or_tty->print_cr(" [%08x-%08x], t: %08x, P: %08x, N: %08x, C: %08x, " | |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
335 "age: %4d, y: %d, surv: %d", |
342 | 336 curr->bottom(), curr->end(), |
337 curr->top(), | |
338 curr->prev_top_at_mark_start(), | |
339 curr->next_top_at_mark_start(), | |
340 curr->top_at_conc_mark_count(), | |
341 curr->age_in_surv_rate_group_cond(), | |
342 curr->is_young(), | |
343 curr->is_survivor()); | |
344 curr = curr->get_next_young_region(); | |
345 } | |
346 } | |
347 | |
348 gclog_or_tty->print_cr(""); | |
349 } | |
350 | |
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
351 void G1CollectedHeap::push_dirty_cards_region(HeapRegion* hr) |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
352 { |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
353 // 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
|
354 // by installing a self pointer. |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
355 HeapRegion* next = hr->get_next_dirty_cards_region(); |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
356 if (next == NULL) { |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
357 HeapRegion* res = (HeapRegion*) |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
358 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
|
359 NULL); |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
360 if (res == NULL) { |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
361 HeapRegion* head; |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
362 do { |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
363 // Put the region to the dirty cards region list. |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
364 head = _dirty_cards_region_list; |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
365 next = (HeapRegion*) |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
366 Atomic::cmpxchg_ptr(hr, &_dirty_cards_region_list, head); |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
367 if (next == head) { |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
368 assert(hr->get_next_dirty_cards_region() == hr, |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
369 "hr->get_next_dirty_cards_region() != hr"); |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
370 if (next == NULL) { |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
371 // The last region in the list points to itself. |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
372 hr->set_next_dirty_cards_region(hr); |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
373 } else { |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
374 hr->set_next_dirty_cards_region(next); |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
375 } |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
376 } |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
377 } while (next != head); |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
378 } |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
379 } |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
380 } |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
381 |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
382 HeapRegion* G1CollectedHeap::pop_dirty_cards_region() |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
383 { |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
384 HeapRegion* head; |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
385 HeapRegion* hr; |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
386 do { |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
387 head = _dirty_cards_region_list; |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
388 if (head == NULL) { |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
389 return NULL; |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
390 } |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
391 HeapRegion* new_head = head->get_next_dirty_cards_region(); |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
392 if (head == new_head) { |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
393 // The last region. |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
394 new_head = NULL; |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
395 } |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
396 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
|
397 head); |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
398 } while (hr != head); |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
399 assert(hr != NULL, "invariant"); |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
400 hr->set_next_dirty_cards_region(NULL); |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
401 return hr; |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
402 } |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
403 |
342 | 404 void G1CollectedHeap::stop_conc_gc_threads() { |
794 | 405 _cg1r->stop(); |
342 | 406 _czft->stop(); |
407 _cmThread->stop(); | |
408 } | |
409 | |
410 | |
411 void G1CollectedHeap::check_ct_logs_at_safepoint() { | |
412 DirtyCardQueueSet& dcqs = JavaThread::dirty_card_queue_set(); | |
413 CardTableModRefBS* ct_bs = (CardTableModRefBS*)barrier_set(); | |
414 | |
415 // Count the dirty cards at the start. | |
416 CountNonCleanMemRegionClosure count1(this); | |
417 ct_bs->mod_card_iterate(&count1); | |
418 int orig_count = count1.n(); | |
419 | |
420 // First clear the logged cards. | |
421 ClearLoggedCardTableEntryClosure clear; | |
422 dcqs.set_closure(&clear); | |
423 dcqs.apply_closure_to_all_completed_buffers(); | |
424 dcqs.iterate_closure_all_threads(false); | |
425 clear.print_histo(); | |
426 | |
427 // Now ensure that there's no dirty cards. | |
428 CountNonCleanMemRegionClosure count2(this); | |
429 ct_bs->mod_card_iterate(&count2); | |
430 if (count2.n() != 0) { | |
431 gclog_or_tty->print_cr("Card table has %d entries; %d originally", | |
432 count2.n(), orig_count); | |
433 } | |
434 guarantee(count2.n() == 0, "Card table should be clean."); | |
435 | |
436 RedirtyLoggedCardTableEntryClosure redirty; | |
437 JavaThread::dirty_card_queue_set().set_closure(&redirty); | |
438 dcqs.apply_closure_to_all_completed_buffers(); | |
439 dcqs.iterate_closure_all_threads(false); | |
440 gclog_or_tty->print_cr("Log entries = %d, dirty cards = %d.", | |
441 clear.calls(), orig_count); | |
442 guarantee(redirty.calls() == clear.calls(), | |
443 "Or else mechanism is broken."); | |
444 | |
445 CountNonCleanMemRegionClosure count3(this); | |
446 ct_bs->mod_card_iterate(&count3); | |
447 if (count3.n() != orig_count) { | |
448 gclog_or_tty->print_cr("Should have restored them all: orig = %d, final = %d.", | |
449 orig_count, count3.n()); | |
450 guarantee(count3.n() >= orig_count, "Should have restored them all."); | |
451 } | |
452 | |
453 JavaThread::dirty_card_queue_set().set_closure(_refine_cte_cl); | |
454 } | |
455 | |
456 // Private class members. | |
457 | |
458 G1CollectedHeap* G1CollectedHeap::_g1h; | |
459 | |
460 // Private methods. | |
461 | |
462 // Finds a HeapRegion that can be used to allocate a given size of block. | |
463 | |
464 | |
465 HeapRegion* G1CollectedHeap::newAllocRegion_work(size_t word_size, | |
466 bool do_expand, | |
467 bool zero_filled) { | |
468 ConcurrentZFThread::note_region_alloc(); | |
469 HeapRegion* res = alloc_free_region_from_lists(zero_filled); | |
470 if (res == NULL && do_expand) { | |
471 expand(word_size * HeapWordSize); | |
472 res = alloc_free_region_from_lists(zero_filled); | |
473 assert(res == NULL || | |
474 (!res->isHumongous() && | |
475 (!zero_filled || | |
476 res->zero_fill_state() == HeapRegion::Allocated)), | |
477 "Alloc Regions must be zero filled (and non-H)"); | |
478 } | |
1545
cc387008223e
6921317: (partial) G1: assert(top() == bottom() || zfs == Allocated,"Region must be empty, or we must be setting it to
apetrusenko
parents:
1489
diff
changeset
|
479 if (res != NULL) { |
cc387008223e
6921317: (partial) G1: assert(top() == bottom() || zfs == Allocated,"Region must be empty, or we must be setting it to
apetrusenko
parents:
1489
diff
changeset
|
480 if (res->is_empty()) { |
cc387008223e
6921317: (partial) G1: assert(top() == bottom() || zfs == Allocated,"Region must be empty, or we must be setting it to
apetrusenko
parents:
1489
diff
changeset
|
481 _free_regions--; |
cc387008223e
6921317: (partial) G1: assert(top() == bottom() || zfs == Allocated,"Region must be empty, or we must be setting it to
apetrusenko
parents:
1489
diff
changeset
|
482 } |
cc387008223e
6921317: (partial) G1: assert(top() == bottom() || zfs == Allocated,"Region must be empty, or we must be setting it to
apetrusenko
parents:
1489
diff
changeset
|
483 assert(!res->isHumongous() && |
cc387008223e
6921317: (partial) G1: assert(top() == bottom() || zfs == Allocated,"Region must be empty, or we must be setting it to
apetrusenko
parents:
1489
diff
changeset
|
484 (!zero_filled || res->zero_fill_state() == HeapRegion::Allocated), |
cc387008223e
6921317: (partial) G1: assert(top() == bottom() || zfs == Allocated,"Region must be empty, or we must be setting it to
apetrusenko
parents:
1489
diff
changeset
|
485 err_msg("Non-young alloc Regions must be zero filled (and non-H):" |
cc387008223e
6921317: (partial) G1: assert(top() == bottom() || zfs == Allocated,"Region must be empty, or we must be setting it to
apetrusenko
parents:
1489
diff
changeset
|
486 " res->isHumongous()=%d, zero_filled=%d, res->zero_fill_state()=%d", |
cc387008223e
6921317: (partial) G1: assert(top() == bottom() || zfs == Allocated,"Region must be empty, or we must be setting it to
apetrusenko
parents:
1489
diff
changeset
|
487 res->isHumongous(), zero_filled, res->zero_fill_state())); |
cc387008223e
6921317: (partial) G1: assert(top() == bottom() || zfs == Allocated,"Region must be empty, or we must be setting it to
apetrusenko
parents:
1489
diff
changeset
|
488 assert(!res->is_on_unclean_list(), |
cc387008223e
6921317: (partial) G1: assert(top() == bottom() || zfs == Allocated,"Region must be empty, or we must be setting it to
apetrusenko
parents:
1489
diff
changeset
|
489 "Alloc Regions must not be on the unclean list"); |
cc387008223e
6921317: (partial) G1: assert(top() == bottom() || zfs == Allocated,"Region must be empty, or we must be setting it to
apetrusenko
parents:
1489
diff
changeset
|
490 if (G1PrintHeapRegions) { |
342 | 491 gclog_or_tty->print_cr("new alloc region %d:["PTR_FORMAT", "PTR_FORMAT"], " |
492 "top "PTR_FORMAT, | |
493 res->hrs_index(), res->bottom(), res->end(), res->top()); | |
494 } | |
495 } | |
496 return res; | |
497 } | |
498 | |
499 HeapRegion* G1CollectedHeap::newAllocRegionWithExpansion(int purpose, | |
500 size_t word_size, | |
501 bool zero_filled) { | |
502 HeapRegion* alloc_region = NULL; | |
503 if (_gc_alloc_region_counts[purpose] < g1_policy()->max_regions(purpose)) { | |
504 alloc_region = newAllocRegion_work(word_size, true, zero_filled); | |
505 if (purpose == GCAllocForSurvived && alloc_region != NULL) { | |
545 | 506 alloc_region->set_survivor(); |
342 | 507 } |
508 ++_gc_alloc_region_counts[purpose]; | |
509 } else { | |
510 g1_policy()->note_alloc_region_limit_reached(purpose); | |
511 } | |
512 return alloc_region; | |
513 } | |
514 | |
515 // If could fit into free regions w/o expansion, try. | |
516 // Otherwise, if can expand, do so. | |
517 // Otherwise, if using ex regions might help, try with ex given back. | |
518 HeapWord* G1CollectedHeap::humongousObjAllocate(size_t word_size) { | |
519 assert(regions_accounted_for(), "Region leakage!"); | |
520 | |
521 // We can't allocate H regions while cleanupComplete is running, since | |
522 // some of the regions we find to be empty might not yet be added to the | |
523 // unclean list. (If we're already at a safepoint, this call is | |
524 // unnecessary, not to mention wrong.) | |
525 if (!SafepointSynchronize::is_at_safepoint()) | |
526 wait_for_cleanup_complete(); | |
527 | |
528 size_t num_regions = | |
529 round_to(word_size, HeapRegion::GrainWords) / HeapRegion::GrainWords; | |
530 | |
531 // Special case if < one region??? | |
532 | |
533 // Remember the ft size. | |
534 size_t x_size = expansion_regions(); | |
535 | |
536 HeapWord* res = NULL; | |
537 bool eliminated_allocated_from_lists = false; | |
538 | |
539 // Can the allocation potentially fit in the free regions? | |
540 if (free_regions() >= num_regions) { | |
541 res = _hrs->obj_allocate(word_size); | |
542 } | |
543 if (res == NULL) { | |
544 // Try expansion. | |
545 size_t fs = _hrs->free_suffix(); | |
546 if (fs + x_size >= num_regions) { | |
547 expand((num_regions - fs) * HeapRegion::GrainBytes); | |
548 res = _hrs->obj_allocate(word_size); | |
549 assert(res != NULL, "This should have worked."); | |
550 } else { | |
551 // Expansion won't help. Are there enough free regions if we get rid | |
552 // of reservations? | |
553 size_t avail = free_regions(); | |
554 if (avail >= num_regions) { | |
555 res = _hrs->obj_allocate(word_size); | |
556 if (res != NULL) { | |
557 remove_allocated_regions_from_lists(); | |
558 eliminated_allocated_from_lists = true; | |
559 } | |
560 } | |
561 } | |
562 } | |
563 if (res != NULL) { | |
564 // Increment by the number of regions allocated. | |
565 // FIXME: Assumes regions all of size GrainBytes. | |
566 #ifndef PRODUCT | |
567 mr_bs()->verify_clean_region(MemRegion(res, res + num_regions * | |
568 HeapRegion::GrainWords)); | |
569 #endif | |
570 if (!eliminated_allocated_from_lists) | |
571 remove_allocated_regions_from_lists(); | |
572 _summary_bytes_used += word_size * HeapWordSize; | |
573 _free_regions -= num_regions; | |
574 _num_humongous_regions += (int) num_regions; | |
575 } | |
576 assert(regions_accounted_for(), "Region Leakage"); | |
577 return res; | |
578 } | |
579 | |
580 HeapWord* | |
581 G1CollectedHeap::attempt_allocation_slow(size_t word_size, | |
582 bool permit_collection_pause) { | |
583 HeapWord* res = NULL; | |
584 HeapRegion* allocated_young_region = NULL; | |
585 | |
586 assert( SafepointSynchronize::is_at_safepoint() || | |
587 Heap_lock->owned_by_self(), "pre condition of the call" ); | |
588 | |
589 if (isHumongous(word_size)) { | |
590 // Allocation of a humongous object can, in a sense, complete a | |
591 // partial region, if the previous alloc was also humongous, and | |
592 // caused the test below to succeed. | |
593 if (permit_collection_pause) | |
594 do_collection_pause_if_appropriate(word_size); | |
595 res = humongousObjAllocate(word_size); | |
596 assert(_cur_alloc_region == NULL | |
597 || !_cur_alloc_region->isHumongous(), | |
598 "Prevent a regression of this bug."); | |
599 | |
600 } else { | |
354
c0f8f7790199
6652160: G1: assert(cur_used_bytes == _g1->recalculate_used(),"It should!") at g1CollectorPolicy.cpp:1425
iveresov
parents:
353
diff
changeset
|
601 // We may have concurrent cleanup working at the time. Wait for it |
c0f8f7790199
6652160: G1: assert(cur_used_bytes == _g1->recalculate_used(),"It should!") at g1CollectorPolicy.cpp:1425
iveresov
parents:
353
diff
changeset
|
602 // to complete. In the future we would probably want to make the |
c0f8f7790199
6652160: G1: assert(cur_used_bytes == _g1->recalculate_used(),"It should!") at g1CollectorPolicy.cpp:1425
iveresov
parents:
353
diff
changeset
|
603 // concurrent cleanup truly concurrent by decoupling it from the |
c0f8f7790199
6652160: G1: assert(cur_used_bytes == _g1->recalculate_used(),"It should!") at g1CollectorPolicy.cpp:1425
iveresov
parents:
353
diff
changeset
|
604 // allocation. |
c0f8f7790199
6652160: G1: assert(cur_used_bytes == _g1->recalculate_used(),"It should!") at g1CollectorPolicy.cpp:1425
iveresov
parents:
353
diff
changeset
|
605 if (!SafepointSynchronize::is_at_safepoint()) |
c0f8f7790199
6652160: G1: assert(cur_used_bytes == _g1->recalculate_used(),"It should!") at g1CollectorPolicy.cpp:1425
iveresov
parents:
353
diff
changeset
|
606 wait_for_cleanup_complete(); |
342 | 607 // If we do a collection pause, this will be reset to a non-NULL |
608 // value. If we don't, nulling here ensures that we allocate a new | |
609 // region below. | |
610 if (_cur_alloc_region != NULL) { | |
611 // We're finished with the _cur_alloc_region. | |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
612 // As we're builing (at least the young portion) of the collection |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
613 // set incrementally we'll add the current allocation region to |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
614 // the collection set here. |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
615 if (_cur_alloc_region->is_young()) { |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
616 g1_policy()->add_region_to_incremental_cset_lhs(_cur_alloc_region); |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
617 } |
342 | 618 _summary_bytes_used += _cur_alloc_region->used(); |
619 _cur_alloc_region = NULL; | |
620 } | |
621 assert(_cur_alloc_region == NULL, "Invariant."); | |
622 // Completion of a heap region is perhaps a good point at which to do | |
623 // a collection pause. | |
624 if (permit_collection_pause) | |
625 do_collection_pause_if_appropriate(word_size); | |
626 // Make sure we have an allocation region available. | |
627 if (_cur_alloc_region == NULL) { | |
628 if (!SafepointSynchronize::is_at_safepoint()) | |
629 wait_for_cleanup_complete(); | |
630 bool next_is_young = should_set_young_locked(); | |
631 // If the next region is not young, make sure it's zero-filled. | |
632 _cur_alloc_region = newAllocRegion(word_size, !next_is_young); | |
633 if (_cur_alloc_region != NULL) { | |
634 _summary_bytes_used -= _cur_alloc_region->used(); | |
635 if (next_is_young) { | |
636 set_region_short_lived_locked(_cur_alloc_region); | |
637 allocated_young_region = _cur_alloc_region; | |
638 } | |
639 } | |
640 } | |
641 assert(_cur_alloc_region == NULL || !_cur_alloc_region->isHumongous(), | |
642 "Prevent a regression of this bug."); | |
643 | |
644 // Now retry the allocation. | |
645 if (_cur_alloc_region != NULL) { | |
1666
5cbac8938c4c
6956639: G1: assert(cached_ptr != card_ptr) failed: shouldn't be, concurrentG1Refine.cpp:307
johnc
parents:
1656
diff
changeset
|
646 if (allocated_young_region != NULL) { |
5cbac8938c4c
6956639: G1: assert(cached_ptr != card_ptr) failed: shouldn't be, concurrentG1Refine.cpp:307
johnc
parents:
1656
diff
changeset
|
647 // We need to ensure that the store to top does not |
5cbac8938c4c
6956639: G1: assert(cached_ptr != card_ptr) failed: shouldn't be, concurrentG1Refine.cpp:307
johnc
parents:
1656
diff
changeset
|
648 // float above the setting of the young type. |
5cbac8938c4c
6956639: G1: assert(cached_ptr != card_ptr) failed: shouldn't be, concurrentG1Refine.cpp:307
johnc
parents:
1656
diff
changeset
|
649 OrderAccess::storestore(); |
5cbac8938c4c
6956639: G1: assert(cached_ptr != card_ptr) failed: shouldn't be, concurrentG1Refine.cpp:307
johnc
parents:
1656
diff
changeset
|
650 } |
342 | 651 res = _cur_alloc_region->allocate(word_size); |
652 } | |
653 } | |
654 | |
655 // NOTE: fails frequently in PRT | |
656 assert(regions_accounted_for(), "Region leakage!"); | |
657 | |
658 if (res != NULL) { | |
659 if (!SafepointSynchronize::is_at_safepoint()) { | |
660 assert( permit_collection_pause, "invariant" ); | |
661 assert( Heap_lock->owned_by_self(), "invariant" ); | |
662 Heap_lock->unlock(); | |
663 } | |
664 | |
665 if (allocated_young_region != NULL) { | |
666 HeapRegion* hr = allocated_young_region; | |
667 HeapWord* bottom = hr->bottom(); | |
668 HeapWord* end = hr->end(); | |
669 MemRegion mr(bottom, end); | |
670 ((CardTableModRefBS*)_g1h->barrier_set())->dirty(mr); | |
671 } | |
672 } | |
673 | |
674 assert( SafepointSynchronize::is_at_safepoint() || | |
675 (res == NULL && Heap_lock->owned_by_self()) || | |
676 (res != NULL && !Heap_lock->owned_by_self()), | |
677 "post condition of the call" ); | |
678 | |
679 return res; | |
680 } | |
681 | |
682 HeapWord* | |
683 G1CollectedHeap::mem_allocate(size_t word_size, | |
684 bool is_noref, | |
685 bool is_tlab, | |
686 bool* gc_overhead_limit_was_exceeded) { | |
687 debug_only(check_for_valid_allocation_state()); | |
688 assert(no_gc_in_progress(), "Allocation during gc not allowed"); | |
689 HeapWord* result = NULL; | |
690 | |
691 // Loop until the allocation is satisified, | |
692 // or unsatisfied after GC. | |
693 for (int try_count = 1; /* return or throw */; try_count += 1) { | |
694 int gc_count_before; | |
695 { | |
696 Heap_lock->lock(); | |
697 result = attempt_allocation(word_size); | |
698 if (result != NULL) { | |
699 // attempt_allocation should have unlocked the heap lock | |
700 assert(is_in(result), "result not in heap"); | |
701 return result; | |
702 } | |
703 // Read the gc count while the heap lock is held. | |
704 gc_count_before = SharedHeap::heap()->total_collections(); | |
705 Heap_lock->unlock(); | |
706 } | |
707 | |
708 // Create the garbage collection operation... | |
709 VM_G1CollectForAllocation op(word_size, | |
710 gc_count_before); | |
711 | |
712 // ...and get the VM thread to execute it. | |
713 VMThread::execute(&op); | |
714 if (op.prologue_succeeded()) { | |
715 result = op.result(); | |
716 assert(result == NULL || is_in(result), "result not in heap"); | |
717 return result; | |
718 } | |
719 | |
720 // Give a warning if we seem to be looping forever. | |
721 if ((QueuedAllocationWarningCount > 0) && | |
722 (try_count % QueuedAllocationWarningCount == 0)) { | |
723 warning("G1CollectedHeap::mem_allocate_work retries %d times", | |
724 try_count); | |
725 } | |
726 } | |
727 } | |
728 | |
729 void G1CollectedHeap::abandon_cur_alloc_region() { | |
730 if (_cur_alloc_region != NULL) { | |
731 // We're finished with the _cur_alloc_region. | |
732 if (_cur_alloc_region->is_empty()) { | |
733 _free_regions++; | |
734 free_region(_cur_alloc_region); | |
735 } else { | |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
736 // As we're builing (at least the young portion) of the collection |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
737 // set incrementally we'll add the current allocation region to |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
738 // the collection set here. |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
739 if (_cur_alloc_region->is_young()) { |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
740 g1_policy()->add_region_to_incremental_cset_lhs(_cur_alloc_region); |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
741 } |
342 | 742 _summary_bytes_used += _cur_alloc_region->used(); |
743 } | |
744 _cur_alloc_region = NULL; | |
745 } | |
746 } | |
747 | |
636 | 748 void G1CollectedHeap::abandon_gc_alloc_regions() { |
749 // first, make sure that the GC alloc region list is empty (it should!) | |
750 assert(_gc_alloc_region_list == NULL, "invariant"); | |
751 release_gc_alloc_regions(true /* totally */); | |
752 } | |
753 | |
342 | 754 class PostMCRemSetClearClosure: public HeapRegionClosure { |
755 ModRefBarrierSet* _mr_bs; | |
756 public: | |
757 PostMCRemSetClearClosure(ModRefBarrierSet* mr_bs) : _mr_bs(mr_bs) {} | |
758 bool doHeapRegion(HeapRegion* r) { | |
759 r->reset_gc_time_stamp(); | |
760 if (r->continuesHumongous()) | |
761 return false; | |
762 HeapRegionRemSet* hrrs = r->rem_set(); | |
763 if (hrrs != NULL) hrrs->clear(); | |
764 // You might think here that we could clear just the cards | |
765 // corresponding to the used region. But no: if we leave a dirty card | |
766 // in a region we might allocate into, then it would prevent that card | |
767 // from being enqueued, and cause it to be missed. | |
768 // Re: the performance cost: we shouldn't be doing full GC anyway! | |
769 _mr_bs->clear(MemRegion(r->bottom(), r->end())); | |
770 return false; | |
771 } | |
772 }; | |
773 | |
774 | |
775 class PostMCRemSetInvalidateClosure: public HeapRegionClosure { | |
776 ModRefBarrierSet* _mr_bs; | |
777 public: | |
778 PostMCRemSetInvalidateClosure(ModRefBarrierSet* mr_bs) : _mr_bs(mr_bs) {} | |
779 bool doHeapRegion(HeapRegion* r) { | |
780 if (r->continuesHumongous()) return false; | |
781 if (r->used_region().word_size() != 0) { | |
782 _mr_bs->invalidate(r->used_region(), true /*whole heap*/); | |
783 } | |
784 return false; | |
785 } | |
786 }; | |
787 | |
626
87fa6e083d82
6760309: G1: update remembered sets during Full GCs
apetrusenko
parents:
620
diff
changeset
|
788 class RebuildRSOutOfRegionClosure: public HeapRegionClosure { |
87fa6e083d82
6760309: G1: update remembered sets during Full GCs
apetrusenko
parents:
620
diff
changeset
|
789 G1CollectedHeap* _g1h; |
87fa6e083d82
6760309: G1: update remembered sets during Full GCs
apetrusenko
parents:
620
diff
changeset
|
790 UpdateRSOopClosure _cl; |
87fa6e083d82
6760309: G1: update remembered sets during Full GCs
apetrusenko
parents:
620
diff
changeset
|
791 int _worker_i; |
87fa6e083d82
6760309: G1: update remembered sets during Full GCs
apetrusenko
parents:
620
diff
changeset
|
792 public: |
87fa6e083d82
6760309: G1: update remembered sets during Full GCs
apetrusenko
parents:
620
diff
changeset
|
793 RebuildRSOutOfRegionClosure(G1CollectedHeap* g1, int worker_i = 0) : |
87fa6e083d82
6760309: G1: update remembered sets during Full GCs
apetrusenko
parents:
620
diff
changeset
|
794 _cl(g1->g1_rem_set()->as_HRInto_G1RemSet(), worker_i), |
87fa6e083d82
6760309: G1: update remembered sets during Full GCs
apetrusenko
parents:
620
diff
changeset
|
795 _worker_i(worker_i), |
87fa6e083d82
6760309: G1: update remembered sets during Full GCs
apetrusenko
parents:
620
diff
changeset
|
796 _g1h(g1) |
87fa6e083d82
6760309: G1: update remembered sets during Full GCs
apetrusenko
parents:
620
diff
changeset
|
797 { } |
87fa6e083d82
6760309: G1: update remembered sets during Full GCs
apetrusenko
parents:
620
diff
changeset
|
798 bool doHeapRegion(HeapRegion* r) { |
87fa6e083d82
6760309: G1: update remembered sets during Full GCs
apetrusenko
parents:
620
diff
changeset
|
799 if (!r->continuesHumongous()) { |
87fa6e083d82
6760309: G1: update remembered sets during Full GCs
apetrusenko
parents:
620
diff
changeset
|
800 _cl.set_from(r); |
87fa6e083d82
6760309: G1: update remembered sets during Full GCs
apetrusenko
parents:
620
diff
changeset
|
801 r->oop_iterate(&_cl); |
87fa6e083d82
6760309: G1: update remembered sets during Full GCs
apetrusenko
parents:
620
diff
changeset
|
802 } |
87fa6e083d82
6760309: G1: update remembered sets during Full GCs
apetrusenko
parents:
620
diff
changeset
|
803 return false; |
87fa6e083d82
6760309: G1: update remembered sets during Full GCs
apetrusenko
parents:
620
diff
changeset
|
804 } |
87fa6e083d82
6760309: G1: update remembered sets during Full GCs
apetrusenko
parents:
620
diff
changeset
|
805 }; |
87fa6e083d82
6760309: G1: update remembered sets during Full GCs
apetrusenko
parents:
620
diff
changeset
|
806 |
87fa6e083d82
6760309: G1: update remembered sets during Full GCs
apetrusenko
parents:
620
diff
changeset
|
807 class ParRebuildRSTask: public AbstractGangTask { |
87fa6e083d82
6760309: G1: update remembered sets during Full GCs
apetrusenko
parents:
620
diff
changeset
|
808 G1CollectedHeap* _g1; |
87fa6e083d82
6760309: G1: update remembered sets during Full GCs
apetrusenko
parents:
620
diff
changeset
|
809 public: |
87fa6e083d82
6760309: G1: update remembered sets during Full GCs
apetrusenko
parents:
620
diff
changeset
|
810 ParRebuildRSTask(G1CollectedHeap* g1) |
87fa6e083d82
6760309: G1: update remembered sets during Full GCs
apetrusenko
parents:
620
diff
changeset
|
811 : AbstractGangTask("ParRebuildRSTask"), |
87fa6e083d82
6760309: G1: update remembered sets during Full GCs
apetrusenko
parents:
620
diff
changeset
|
812 _g1(g1) |
87fa6e083d82
6760309: G1: update remembered sets during Full GCs
apetrusenko
parents:
620
diff
changeset
|
813 { } |
87fa6e083d82
6760309: G1: update remembered sets during Full GCs
apetrusenko
parents:
620
diff
changeset
|
814 |
87fa6e083d82
6760309: G1: update remembered sets during Full GCs
apetrusenko
parents:
620
diff
changeset
|
815 void work(int i) { |
87fa6e083d82
6760309: G1: update remembered sets during Full GCs
apetrusenko
parents:
620
diff
changeset
|
816 RebuildRSOutOfRegionClosure rebuild_rs(_g1, i); |
87fa6e083d82
6760309: G1: update remembered sets during Full GCs
apetrusenko
parents:
620
diff
changeset
|
817 _g1->heap_region_par_iterate_chunked(&rebuild_rs, i, |
87fa6e083d82
6760309: G1: update remembered sets during Full GCs
apetrusenko
parents:
620
diff
changeset
|
818 HeapRegion::RebuildRSClaimValue); |
87fa6e083d82
6760309: G1: update remembered sets during Full GCs
apetrusenko
parents:
620
diff
changeset
|
819 } |
87fa6e083d82
6760309: G1: update remembered sets during Full GCs
apetrusenko
parents:
620
diff
changeset
|
820 }; |
87fa6e083d82
6760309: G1: update remembered sets during Full GCs
apetrusenko
parents:
620
diff
changeset
|
821 |
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
822 void G1CollectedHeap::do_collection(bool explicit_gc, |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
823 bool clear_all_soft_refs, |
342 | 824 size_t word_size) { |
1359
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1313
diff
changeset
|
825 if (GC_locker::check_active_before_gc()) { |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1313
diff
changeset
|
826 return; // GC is disabled (e.g. JNI GetXXXCritical operation) |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1313
diff
changeset
|
827 } |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1313
diff
changeset
|
828 |
342 | 829 ResourceMark rm; |
830 | |
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
831 if (PrintHeapAtGC) { |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
832 Universe::print_heap_before_gc(); |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
833 } |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
834 |
342 | 835 assert(SafepointSynchronize::is_at_safepoint(), "should be at safepoint"); |
836 assert(Thread::current() == VMThread::vm_thread(), "should be in vm thread"); | |
837 | |
1387
0bfd3fb24150
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
jmasa
parents:
1360
diff
changeset
|
838 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
|
839 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
|
840 |
0bfd3fb24150
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
jmasa
parents:
1360
diff
changeset
|
841 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
|
842 |
342 | 843 { |
844 IsGCActiveMark x; | |
845 | |
846 // Timing | |
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
847 bool system_gc = (gc_cause() == GCCause::_java_lang_system_gc); |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
848 assert(!system_gc || explicit_gc, "invariant"); |
342 | 849 gclog_or_tty->date_stamp(PrintGC && PrintGCDateStamps); |
850 TraceCPUTime tcpu(PrintGCDetails, true, gclog_or_tty); | |
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
851 TraceTime t(system_gc ? "Full GC (System.gc())" : "Full GC", |
1387
0bfd3fb24150
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
jmasa
parents:
1360
diff
changeset
|
852 PrintGC, true, gclog_or_tty); |
342 | 853 |
1089
db0d5eba9d20
6815790: G1: Missing MemoryPoolMXBeans with -XX:+UseG1GC
tonyp
parents:
1088
diff
changeset
|
854 TraceMemoryManagerStats tms(true /* fullGC */); |
db0d5eba9d20
6815790: G1: Missing MemoryPoolMXBeans with -XX:+UseG1GC
tonyp
parents:
1088
diff
changeset
|
855 |
342 | 856 double start = os::elapsedTime(); |
857 g1_policy()->record_full_collection_start(); | |
858 | |
859 gc_prologue(true); | |
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
860 increment_total_collections(true /* full gc */); |
342 | 861 |
862 size_t g1h_prev_used = used(); | |
863 assert(used() == recalculate_used(), "Should be equal"); | |
864 | |
865 if (VerifyBeforeGC && total_collections() >= VerifyGCStartAt) { | |
866 HandleMark hm; // Discard invalid handles created during verification | |
867 prepare_for_verify(); | |
868 gclog_or_tty->print(" VerifyBeforeGC:"); | |
869 Universe::verify(true); | |
870 } | |
871 assert(regions_accounted_for(), "Region leakage!"); | |
872 | |
873 COMPILER2_PRESENT(DerivedPointerTable::clear()); | |
874 | |
875 // We want to discover references, but not process them yet. | |
876 // This mode is disabled in | |
877 // instanceRefKlass::process_discovered_references if the | |
878 // generation does some collection work, or | |
879 // instanceRefKlass::enqueue_discovered_references if the | |
880 // generation returns without doing any work. | |
881 ref_processor()->disable_discovery(); | |
882 ref_processor()->abandon_partial_discovery(); | |
883 ref_processor()->verify_no_references_recorded(); | |
884 | |
885 // Abandon current iterations of concurrent marking and concurrent | |
886 // refinement, if any are in progress. | |
887 concurrent_mark()->abort(); | |
888 | |
889 // Make sure we'll choose a new allocation region afterwards. | |
890 abandon_cur_alloc_region(); | |
636 | 891 abandon_gc_alloc_regions(); |
342 | 892 assert(_cur_alloc_region == NULL, "Invariant."); |
893 g1_rem_set()->as_HRInto_G1RemSet()->cleanupHRRS(); | |
894 tear_down_region_lists(); | |
895 set_used_regions_to_need_zero_fill(); | |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
896 |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
897 // 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
|
898 // 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
|
899 // 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
|
900 // after this full GC. |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
901 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
|
902 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
|
903 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
|
904 |
342 | 905 if (g1_policy()->in_young_gc_mode()) { |
906 empty_young_list(); | |
907 g1_policy()->set_full_young_gcs(true); | |
908 } | |
909 | |
910 // Temporarily make reference _discovery_ single threaded (non-MT). | |
911 ReferenceProcessorMTMutator rp_disc_ser(ref_processor(), false); | |
912 | |
913 // Temporarily make refs discovery atomic | |
914 ReferenceProcessorAtomicMutator rp_disc_atomic(ref_processor(), true); | |
915 | |
916 // Temporarily clear _is_alive_non_header | |
917 ReferenceProcessorIsAliveMutator rp_is_alive_null(ref_processor(), NULL); | |
918 | |
919 ref_processor()->enable_discovery(); | |
1387
0bfd3fb24150
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
jmasa
parents:
1360
diff
changeset
|
920 ref_processor()->setup_policy(do_clear_all_soft_refs); |
342 | 921 |
922 // Do collection work | |
923 { | |
924 HandleMark hm; // Discard invalid handles created during gc | |
1387
0bfd3fb24150
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
jmasa
parents:
1360
diff
changeset
|
925 G1MarkSweep::invoke_at_safepoint(ref_processor(), do_clear_all_soft_refs); |
342 | 926 } |
927 // Because freeing humongous regions may have added some unclean | |
928 // regions, it is necessary to tear down again before rebuilding. | |
929 tear_down_region_lists(); | |
930 rebuild_region_lists(); | |
931 | |
932 _summary_bytes_used = recalculate_used(); | |
933 | |
934 ref_processor()->enqueue_discovered_references(); | |
935 | |
936 COMPILER2_PRESENT(DerivedPointerTable::update_pointers()); | |
937 | |
1089
db0d5eba9d20
6815790: G1: Missing MemoryPoolMXBeans with -XX:+UseG1GC
tonyp
parents:
1088
diff
changeset
|
938 MemoryService::track_memory_usage(); |
db0d5eba9d20
6815790: G1: Missing MemoryPoolMXBeans with -XX:+UseG1GC
tonyp
parents:
1088
diff
changeset
|
939 |
342 | 940 if (VerifyAfterGC && total_collections() >= VerifyGCStartAt) { |
941 HandleMark hm; // Discard invalid handles created during verification | |
942 gclog_or_tty->print(" VerifyAfterGC:"); | |
637
25e146966e7c
6817419: G1: Enable extensive verification for humongous regions
iveresov
parents:
636
diff
changeset
|
943 prepare_for_verify(); |
342 | 944 Universe::verify(false); |
945 } | |
946 NOT_PRODUCT(ref_processor()->verify_no_references_recorded()); | |
947 | |
948 reset_gc_time_stamp(); | |
949 // Since everything potentially moved, we will clear all remembered | |
626
87fa6e083d82
6760309: G1: update remembered sets during Full GCs
apetrusenko
parents:
620
diff
changeset
|
950 // sets, and clear all cards. Later we will rebuild remebered |
87fa6e083d82
6760309: G1: update remembered sets during Full GCs
apetrusenko
parents:
620
diff
changeset
|
951 // sets. We will also reset the GC time stamps of the regions. |
342 | 952 PostMCRemSetClearClosure rs_clear(mr_bs()); |
953 heap_region_iterate(&rs_clear); | |
954 | |
955 // Resize the heap if necessary. | |
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
956 resize_if_necessary_after_full_collection(explicit_gc ? 0 : word_size); |
342 | 957 |
958 if (_cg1r->use_cache()) { | |
959 _cg1r->clear_and_record_card_counts(); | |
960 _cg1r->clear_hot_cache(); | |
961 } | |
962 | |
626
87fa6e083d82
6760309: G1: update remembered sets during Full GCs
apetrusenko
parents:
620
diff
changeset
|
963 // Rebuild remembered sets of all regions. |
87fa6e083d82
6760309: G1: update remembered sets during Full GCs
apetrusenko
parents:
620
diff
changeset
|
964 if (ParallelGCThreads > 0) { |
87fa6e083d82
6760309: G1: update remembered sets during Full GCs
apetrusenko
parents:
620
diff
changeset
|
965 ParRebuildRSTask rebuild_rs_task(this); |
87fa6e083d82
6760309: G1: update remembered sets during Full GCs
apetrusenko
parents:
620
diff
changeset
|
966 assert(check_heap_region_claim_values( |
87fa6e083d82
6760309: G1: update remembered sets during Full GCs
apetrusenko
parents:
620
diff
changeset
|
967 HeapRegion::InitialClaimValue), "sanity check"); |
87fa6e083d82
6760309: G1: update remembered sets during Full GCs
apetrusenko
parents:
620
diff
changeset
|
968 set_par_threads(workers()->total_workers()); |
87fa6e083d82
6760309: G1: update remembered sets during Full GCs
apetrusenko
parents:
620
diff
changeset
|
969 workers()->run_task(&rebuild_rs_task); |
87fa6e083d82
6760309: G1: update remembered sets during Full GCs
apetrusenko
parents:
620
diff
changeset
|
970 set_par_threads(0); |
87fa6e083d82
6760309: G1: update remembered sets during Full GCs
apetrusenko
parents:
620
diff
changeset
|
971 assert(check_heap_region_claim_values( |
87fa6e083d82
6760309: G1: update remembered sets during Full GCs
apetrusenko
parents:
620
diff
changeset
|
972 HeapRegion::RebuildRSClaimValue), "sanity check"); |
87fa6e083d82
6760309: G1: update remembered sets during Full GCs
apetrusenko
parents:
620
diff
changeset
|
973 reset_heap_region_claim_values(); |
87fa6e083d82
6760309: G1: update remembered sets during Full GCs
apetrusenko
parents:
620
diff
changeset
|
974 } else { |
87fa6e083d82
6760309: G1: update remembered sets during Full GCs
apetrusenko
parents:
620
diff
changeset
|
975 RebuildRSOutOfRegionClosure rebuild_rs(this); |
87fa6e083d82
6760309: G1: update remembered sets during Full GCs
apetrusenko
parents:
620
diff
changeset
|
976 heap_region_iterate(&rebuild_rs); |
87fa6e083d82
6760309: G1: update remembered sets during Full GCs
apetrusenko
parents:
620
diff
changeset
|
977 } |
87fa6e083d82
6760309: G1: update remembered sets during Full GCs
apetrusenko
parents:
620
diff
changeset
|
978 |
342 | 979 if (PrintGC) { |
980 print_size_transition(gclog_or_tty, g1h_prev_used, used(), capacity()); | |
981 } | |
982 | |
983 if (true) { // FIXME | |
984 // Ask the permanent generation to adjust size for full collections | |
985 perm()->compute_new_size(); | |
986 } | |
987 | |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
988 // 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
|
989 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
|
990 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
|
991 |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
992 // 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
|
993 // 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
|
994 // evacuation pause. |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
995 clear_cset_fast_test(); |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
996 |
342 | 997 double end = os::elapsedTime(); |
998 g1_policy()->record_full_collection_end(); | |
999 | |
546
05c6d52fa7a9
6690928: Use spinning in combination with yields for workstealing termination.
jmasa
parents:
545
diff
changeset
|
1000 #ifdef TRACESPINNING |
05c6d52fa7a9
6690928: Use spinning in combination with yields for workstealing termination.
jmasa
parents:
545
diff
changeset
|
1001 ParallelTaskTerminator::print_termination_counts(); |
05c6d52fa7a9
6690928: Use spinning in combination with yields for workstealing termination.
jmasa
parents:
545
diff
changeset
|
1002 #endif |
05c6d52fa7a9
6690928: Use spinning in combination with yields for workstealing termination.
jmasa
parents:
545
diff
changeset
|
1003 |
342 | 1004 gc_epilogue(true); |
1005 | |
794 | 1006 // Discard all rset updates |
1007 JavaThread::dirty_card_queue_set().abandon_logs(); | |
616
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
1008 assert(!G1DeferredRSUpdate |
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
1009 || (G1DeferredRSUpdate && (dirty_card_queue_set().completed_buffers_num() == 0)), "Should not be any"); |
342 | 1010 assert(regions_accounted_for(), "Region leakage!"); |
1011 } | |
1012 | |
1013 if (g1_policy()->in_young_gc_mode()) { | |
1014 _young_list->reset_sampled_info(); | |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
1015 // At this point there should be no regions in the |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
1016 // entire heap tagged as young. |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
1017 assert( check_young_list_empty(true /* check_heap */), |
342 | 1018 "young list should be empty at this point"); |
1019 } | |
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
1020 |
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
1021 // Update the number of full collections that have been completed. |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
1022 increment_full_collections_completed(false /* outer */); |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
1023 |
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
1024 if (PrintHeapAtGC) { |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
1025 Universe::print_heap_after_gc(); |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
1026 } |
342 | 1027 } |
1028 | |
1029 void G1CollectedHeap::do_full_collection(bool clear_all_soft_refs) { | |
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
1030 do_collection(true, /* explicit_gc */ |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
1031 clear_all_soft_refs, |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
1032 0 /* word_size */); |
342 | 1033 } |
1034 | |
1035 // This code is mostly copied from TenuredGeneration. | |
1036 void | |
1037 G1CollectedHeap:: | |
1038 resize_if_necessary_after_full_collection(size_t word_size) { | |
1039 assert(MinHeapFreeRatio <= MaxHeapFreeRatio, "sanity check"); | |
1040 | |
1041 // Include the current allocation, if any, and bytes that will be | |
1042 // pre-allocated to support collections, as "used". | |
1043 const size_t used_after_gc = used(); | |
1044 const size_t capacity_after_gc = capacity(); | |
1045 const size_t free_after_gc = capacity_after_gc - used_after_gc; | |
1046 | |
1047 // We don't have floating point command-line arguments | |
1048 const double minimum_free_percentage = (double) MinHeapFreeRatio / 100; | |
1049 const double maximum_used_percentage = 1.0 - minimum_free_percentage; | |
1050 const double maximum_free_percentage = (double) MaxHeapFreeRatio / 100; | |
1051 const double minimum_used_percentage = 1.0 - maximum_free_percentage; | |
1052 | |
1053 size_t minimum_desired_capacity = (size_t) (used_after_gc / maximum_used_percentage); | |
1054 size_t maximum_desired_capacity = (size_t) (used_after_gc / minimum_used_percentage); | |
1055 | |
1056 // Don't shrink less than the initial size. | |
1057 minimum_desired_capacity = | |
1058 MAX2(minimum_desired_capacity, | |
1059 collector_policy()->initial_heap_byte_size()); | |
1060 maximum_desired_capacity = | |
1061 MAX2(maximum_desired_capacity, | |
1062 collector_policy()->initial_heap_byte_size()); | |
1063 | |
1064 // We are failing here because minimum_desired_capacity is | |
1065 assert(used_after_gc <= minimum_desired_capacity, "sanity check"); | |
1066 assert(minimum_desired_capacity <= maximum_desired_capacity, "sanity check"); | |
1067 | |
1068 if (PrintGC && Verbose) { | |
1069 const double free_percentage = ((double)free_after_gc) / capacity(); | |
1070 gclog_or_tty->print_cr("Computing new size after full GC "); | |
1071 gclog_or_tty->print_cr(" " | |
1072 " minimum_free_percentage: %6.2f", | |
1073 minimum_free_percentage); | |
1074 gclog_or_tty->print_cr(" " | |
1075 " maximum_free_percentage: %6.2f", | |
1076 maximum_free_percentage); | |
1077 gclog_or_tty->print_cr(" " | |
1078 " capacity: %6.1fK" | |
1079 " minimum_desired_capacity: %6.1fK" | |
1080 " maximum_desired_capacity: %6.1fK", | |
1081 capacity() / (double) K, | |
1082 minimum_desired_capacity / (double) K, | |
1083 maximum_desired_capacity / (double) K); | |
1084 gclog_or_tty->print_cr(" " | |
1085 " free_after_gc : %6.1fK" | |
1086 " used_after_gc : %6.1fK", | |
1087 free_after_gc / (double) K, | |
1088 used_after_gc / (double) K); | |
1089 gclog_or_tty->print_cr(" " | |
1090 " free_percentage: %6.2f", | |
1091 free_percentage); | |
1092 } | |
1093 if (capacity() < minimum_desired_capacity) { | |
1094 // Don't expand unless it's significant | |
1095 size_t expand_bytes = minimum_desired_capacity - capacity_after_gc; | |
1096 expand(expand_bytes); | |
1097 if (PrintGC && Verbose) { | |
1098 gclog_or_tty->print_cr(" expanding:" | |
1099 " minimum_desired_capacity: %6.1fK" | |
1100 " expand_bytes: %6.1fK", | |
1101 minimum_desired_capacity / (double) K, | |
1102 expand_bytes / (double) K); | |
1103 } | |
1104 | |
1105 // No expansion, now see if we want to shrink | |
1106 } else if (capacity() > maximum_desired_capacity) { | |
1107 // Capacity too large, compute shrinking size | |
1108 size_t shrink_bytes = capacity_after_gc - maximum_desired_capacity; | |
1109 shrink(shrink_bytes); | |
1110 if (PrintGC && Verbose) { | |
1111 gclog_or_tty->print_cr(" " | |
1112 " shrinking:" | |
1113 " initSize: %.1fK" | |
1114 " maximum_desired_capacity: %.1fK", | |
1115 collector_policy()->initial_heap_byte_size() / (double) K, | |
1116 maximum_desired_capacity / (double) K); | |
1117 gclog_or_tty->print_cr(" " | |
1118 " shrink_bytes: %.1fK", | |
1119 shrink_bytes / (double) K); | |
1120 } | |
1121 } | |
1122 } | |
1123 | |
1124 | |
1125 HeapWord* | |
1126 G1CollectedHeap::satisfy_failed_allocation(size_t word_size) { | |
1127 HeapWord* result = NULL; | |
1128 | |
1129 // In a G1 heap, we're supposed to keep allocation from failing by | |
1130 // incremental pauses. Therefore, at least for now, we'll favor | |
1131 // expansion over collection. (This might change in the future if we can | |
1132 // do something smarter than full collection to satisfy a failed alloc.) | |
1133 | |
1134 result = expand_and_allocate(word_size); | |
1135 if (result != NULL) { | |
1136 assert(is_in(result), "result not in heap"); | |
1137 return result; | |
1138 } | |
1139 | |
1140 // OK, I guess we have to try collection. | |
1141 | |
1142 do_collection(false, false, word_size); | |
1143 | |
1144 result = attempt_allocation(word_size, /*permit_collection_pause*/false); | |
1145 | |
1146 if (result != NULL) { | |
1147 assert(is_in(result), "result not in heap"); | |
1148 return result; | |
1149 } | |
1150 | |
1151 // Try collecting soft references. | |
1152 do_collection(false, true, word_size); | |
1153 result = attempt_allocation(word_size, /*permit_collection_pause*/false); | |
1154 if (result != NULL) { | |
1155 assert(is_in(result), "result not in heap"); | |
1156 return result; | |
1157 } | |
1158 | |
1387
0bfd3fb24150
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
jmasa
parents:
1360
diff
changeset
|
1159 assert(!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
|
1160 "Flag should have been handled and cleared prior to this point"); |
0bfd3fb24150
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
jmasa
parents:
1360
diff
changeset
|
1161 |
342 | 1162 // What else? We might try synchronous finalization later. If the total |
1163 // space available is large enough for the allocation, then a more | |
1164 // complete compaction phase than we've tried so far might be | |
1165 // appropriate. | |
1166 return NULL; | |
1167 } | |
1168 | |
1169 // Attempting to expand the heap sufficiently | |
1170 // to support an allocation of the given "word_size". If | |
1171 // successful, perform the allocation and return the address of the | |
1172 // allocated block, or else "NULL". | |
1173 | |
1174 HeapWord* G1CollectedHeap::expand_and_allocate(size_t word_size) { | |
1175 size_t expand_bytes = word_size * HeapWordSize; | |
1176 if (expand_bytes < MinHeapDeltaBytes) { | |
1177 expand_bytes = MinHeapDeltaBytes; | |
1178 } | |
1179 expand(expand_bytes); | |
1180 assert(regions_accounted_for(), "Region leakage!"); | |
1181 HeapWord* result = attempt_allocation(word_size, false /* permit_collection_pause */); | |
1182 return result; | |
1183 } | |
1184 | |
1185 size_t G1CollectedHeap::free_region_if_totally_empty(HeapRegion* hr) { | |
1186 size_t pre_used = 0; | |
1187 size_t cleared_h_regions = 0; | |
1188 size_t freed_regions = 0; | |
1189 UncleanRegionList local_list; | |
1190 free_region_if_totally_empty_work(hr, pre_used, cleared_h_regions, | |
1191 freed_regions, &local_list); | |
1192 | |
1193 finish_free_region_work(pre_used, cleared_h_regions, freed_regions, | |
1194 &local_list); | |
1195 return pre_used; | |
1196 } | |
1197 | |
1198 void | |
1199 G1CollectedHeap::free_region_if_totally_empty_work(HeapRegion* hr, | |
1200 size_t& pre_used, | |
1201 size_t& cleared_h, | |
1202 size_t& freed_regions, | |
1203 UncleanRegionList* list, | |
1204 bool par) { | |
1205 assert(!hr->continuesHumongous(), "should have filtered these out"); | |
1206 size_t res = 0; | |
677 | 1207 if (hr->used() > 0 && hr->garbage_bytes() == hr->used() && |
1208 !hr->is_young()) { | |
1209 if (G1PolicyVerbose > 0) | |
1210 gclog_or_tty->print_cr("Freeing empty region "PTR_FORMAT "(" SIZE_FORMAT " bytes)" | |
1211 " during cleanup", hr, hr->used()); | |
1212 free_region_work(hr, pre_used, cleared_h, freed_regions, list, par); | |
342 | 1213 } |
1214 } | |
1215 | |
1216 // FIXME: both this and shrink could probably be more efficient by | |
1217 // doing one "VirtualSpace::expand_by" call rather than several. | |
1218 void G1CollectedHeap::expand(size_t expand_bytes) { | |
1219 size_t old_mem_size = _g1_storage.committed_size(); | |
1220 // We expand by a minimum of 1K. | |
1221 expand_bytes = MAX2(expand_bytes, (size_t)K); | |
1222 size_t aligned_expand_bytes = | |
1223 ReservedSpace::page_align_size_up(expand_bytes); | |
1224 aligned_expand_bytes = align_size_up(aligned_expand_bytes, | |
1225 HeapRegion::GrainBytes); | |
1226 expand_bytes = aligned_expand_bytes; | |
1227 while (expand_bytes > 0) { | |
1228 HeapWord* base = (HeapWord*)_g1_storage.high(); | |
1229 // Commit more storage. | |
1230 bool successful = _g1_storage.expand_by(HeapRegion::GrainBytes); | |
1231 if (!successful) { | |
1232 expand_bytes = 0; | |
1233 } else { | |
1234 expand_bytes -= HeapRegion::GrainBytes; | |
1235 // Expand the committed region. | |
1236 HeapWord* high = (HeapWord*) _g1_storage.high(); | |
1237 _g1_committed.set_end(high); | |
1238 // Create a new HeapRegion. | |
1239 MemRegion mr(base, high); | |
1240 bool is_zeroed = !_g1_max_committed.contains(base); | |
1241 HeapRegion* hr = new HeapRegion(_bot_shared, mr, is_zeroed); | |
1242 | |
1243 // Now update max_committed if necessary. | |
1244 _g1_max_committed.set_end(MAX2(_g1_max_committed.end(), high)); | |
1245 | |
1246 // Add it to the HeapRegionSeq. | |
1247 _hrs->insert(hr); | |
1248 // Set the zero-fill state, according to whether it's already | |
1249 // zeroed. | |
1250 { | |
1251 MutexLockerEx x(ZF_mon, Mutex::_no_safepoint_check_flag); | |
1252 if (is_zeroed) { | |
1253 hr->set_zero_fill_complete(); | |
1254 put_free_region_on_list_locked(hr); | |
1255 } else { | |
1256 hr->set_zero_fill_needed(); | |
1257 put_region_on_unclean_list_locked(hr); | |
1258 } | |
1259 } | |
1260 _free_regions++; | |
1261 // And we used up an expansion region to create it. | |
1262 _expansion_regions--; | |
1263 // Tell the cardtable about it. | |
1264 Universe::heap()->barrier_set()->resize_covered_region(_g1_committed); | |
1265 // And the offset table as well. | |
1266 _bot_shared->resize(_g1_committed.word_size()); | |
1267 } | |
1268 } | |
1269 if (Verbose && PrintGC) { | |
1270 size_t new_mem_size = _g1_storage.committed_size(); | |
1271 gclog_or_tty->print_cr("Expanding garbage-first heap from %ldK by %ldK to %ldK", | |
1272 old_mem_size/K, aligned_expand_bytes/K, | |
1273 new_mem_size/K); | |
1274 } | |
1275 } | |
1276 | |
1277 void G1CollectedHeap::shrink_helper(size_t shrink_bytes) | |
1278 { | |
1279 size_t old_mem_size = _g1_storage.committed_size(); | |
1280 size_t aligned_shrink_bytes = | |
1281 ReservedSpace::page_align_size_down(shrink_bytes); | |
1282 aligned_shrink_bytes = align_size_down(aligned_shrink_bytes, | |
1283 HeapRegion::GrainBytes); | |
1284 size_t num_regions_deleted = 0; | |
1285 MemRegion mr = _hrs->shrink_by(aligned_shrink_bytes, num_regions_deleted); | |
1286 | |
1287 assert(mr.end() == (HeapWord*)_g1_storage.high(), "Bad shrink!"); | |
1288 if (mr.byte_size() > 0) | |
1289 _g1_storage.shrink_by(mr.byte_size()); | |
1290 assert(mr.start() == (HeapWord*)_g1_storage.high(), "Bad shrink!"); | |
1291 | |
1292 _g1_committed.set_end(mr.start()); | |
1293 _free_regions -= num_regions_deleted; | |
1294 _expansion_regions += num_regions_deleted; | |
1295 | |
1296 // Tell the cardtable about it. | |
1297 Universe::heap()->barrier_set()->resize_covered_region(_g1_committed); | |
1298 | |
1299 // And the offset table as well. | |
1300 _bot_shared->resize(_g1_committed.word_size()); | |
1301 | |
1302 HeapRegionRemSet::shrink_heap(n_regions()); | |
1303 | |
1304 if (Verbose && PrintGC) { | |
1305 size_t new_mem_size = _g1_storage.committed_size(); | |
1306 gclog_or_tty->print_cr("Shrinking garbage-first heap from %ldK by %ldK to %ldK", | |
1307 old_mem_size/K, aligned_shrink_bytes/K, | |
1308 new_mem_size/K); | |
1309 } | |
1310 } | |
1311 | |
1312 void G1CollectedHeap::shrink(size_t shrink_bytes) { | |
636 | 1313 release_gc_alloc_regions(true /* totally */); |
342 | 1314 tear_down_region_lists(); // We will rebuild them in a moment. |
1315 shrink_helper(shrink_bytes); | |
1316 rebuild_region_lists(); | |
1317 } | |
1318 | |
1319 // Public methods. | |
1320 | |
1321 #ifdef _MSC_VER // the use of 'this' below gets a warning, make it go away | |
1322 #pragma warning( disable:4355 ) // 'this' : used in base member initializer list | |
1323 #endif // _MSC_VER | |
1324 | |
1325 | |
1326 G1CollectedHeap::G1CollectedHeap(G1CollectorPolicy* policy_) : | |
1327 SharedHeap(policy_), | |
1328 _g1_policy(policy_), | |
1111 | 1329 _dirty_card_queue_set(false), |
1705 | 1330 _into_cset_dirty_card_queue_set(false), |
342 | 1331 _ref_processor(NULL), |
1332 _process_strong_tasks(new SubTasksDone(G1H_PS_NumElements)), | |
1333 _bot_shared(NULL), | |
1334 _par_alloc_during_gc_lock(Mutex::leaf, "par alloc during GC lock"), | |
1335 _objs_with_preserved_marks(NULL), _preserved_marks_of_objs(NULL), | |
1336 _evac_failure_scan_stack(NULL) , | |
1337 _mark_in_progress(false), | |
1338 _cg1r(NULL), _czft(NULL), _summary_bytes_used(0), | |
1339 _cur_alloc_region(NULL), | |
1340 _refine_cte_cl(NULL), | |
1341 _free_region_list(NULL), _free_region_list_size(0), | |
1342 _free_regions(0), | |
1343 _full_collection(false), | |
1344 _unclean_region_list(), | |
1345 _unclean_regions_coming(false), | |
1346 _young_list(new YoungList(this)), | |
1347 _gc_time_stamp(0), | |
526 | 1348 _surviving_young_words(NULL), |
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
1349 _full_collections_completed(0), |
526 | 1350 _in_cset_fast_test(NULL), |
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
1351 _in_cset_fast_test_base(NULL), |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
1352 _dirty_cards_region_list(NULL) { |
342 | 1353 _g1h = this; // To catch bugs. |
1354 if (_process_strong_tasks == NULL || !_process_strong_tasks->valid()) { | |
1355 vm_exit_during_initialization("Failed necessary allocation."); | |
1356 } | |
942
2c79770d1f6e
6819085: G1: use larger and/or user settable region size
tonyp
parents:
941
diff
changeset
|
1357 |
2c79770d1f6e
6819085: G1: use larger and/or user settable region size
tonyp
parents:
941
diff
changeset
|
1358 _humongous_object_threshold_in_words = HeapRegion::GrainWords / 2; |
2c79770d1f6e
6819085: G1: use larger and/or user settable region size
tonyp
parents:
941
diff
changeset
|
1359 |
342 | 1360 int n_queues = MAX2((int)ParallelGCThreads, 1); |
1361 _task_queues = new RefToScanQueueSet(n_queues); | |
1362 | |
1363 int n_rem_sets = HeapRegionRemSet::num_par_rem_sets(); | |
1364 assert(n_rem_sets > 0, "Invariant."); | |
1365 | |
1366 HeapRegionRemSetIterator** iter_arr = | |
1367 NEW_C_HEAP_ARRAY(HeapRegionRemSetIterator*, n_queues); | |
1368 for (int i = 0; i < n_queues; i++) { | |
1369 iter_arr[i] = new HeapRegionRemSetIterator(); | |
1370 } | |
1371 _rem_set_iterator = iter_arr; | |
1372 | |
1373 for (int i = 0; i < n_queues; i++) { | |
1374 RefToScanQueue* q = new RefToScanQueue(); | |
1375 q->initialize(); | |
1376 _task_queues->register_queue(i, q); | |
1377 } | |
1378 | |
1379 for (int ap = 0; ap < GCAllocPurposeCount; ++ap) { | |
636 | 1380 _gc_alloc_regions[ap] = NULL; |
1381 _gc_alloc_region_counts[ap] = 0; | |
1382 _retained_gc_alloc_regions[ap] = NULL; | |
1383 // by default, we do not retain a GC alloc region for each ap; | |
1384 // we'll override this, when appropriate, below | |
1385 _retain_gc_alloc_region[ap] = false; | |
1386 } | |
1387 | |
1388 // We will try to remember the last half-full tenured region we | |
1389 // allocated to at the end of a collection so that we can re-use it | |
1390 // during the next collection. | |
1391 _retain_gc_alloc_region[GCAllocForTenured] = true; | |
1392 | |
342 | 1393 guarantee(_task_queues != NULL, "task_queues allocation failure."); |
1394 } | |
1395 | |
1396 jint G1CollectedHeap::initialize() { | |
1166 | 1397 CollectedHeap::pre_initialize(); |
342 | 1398 os::enable_vtime(); |
1399 | |
1400 // Necessary to satisfy locking discipline assertions. | |
1401 | |
1402 MutexLocker x(Heap_lock); | |
1403 | |
1404 // While there are no constraints in the GC code that HeapWordSize | |
1405 // be any particular value, there are multiple other areas in the | |
1406 // system which believe this to be true (e.g. oop->object_size in some | |
1407 // cases incorrectly returns the size in wordSize units rather than | |
1408 // HeapWordSize). | |
1409 guarantee(HeapWordSize == wordSize, "HeapWordSize must equal wordSize"); | |
1410 | |
1411 size_t init_byte_size = collector_policy()->initial_heap_byte_size(); | |
1412 size_t max_byte_size = collector_policy()->max_heap_byte_size(); | |
1413 | |
1414 // Ensure that the sizes are properly aligned. | |
1415 Universe::check_alignment(init_byte_size, HeapRegion::GrainBytes, "g1 heap"); | |
1416 Universe::check_alignment(max_byte_size, HeapRegion::GrainBytes, "g1 heap"); | |
1417 | |
1418 _cg1r = new ConcurrentG1Refine(); | |
1419 | |
1420 // Reserve the maximum. | |
1421 PermanentGenerationSpec* pgs = collector_policy()->permanent_generation(); | |
1422 // Includes the perm-gen. | |
642
660978a2a31a
6791178: Specialize for zero as the compressed oop vm heap base
kvn
parents:
620
diff
changeset
|
1423 |
660978a2a31a
6791178: Specialize for zero as the compressed oop vm heap base
kvn
parents:
620
diff
changeset
|
1424 const size_t total_reserved = max_byte_size + pgs->max_size(); |
660978a2a31a
6791178: Specialize for zero as the compressed oop vm heap base
kvn
parents:
620
diff
changeset
|
1425 char* addr = Universe::preferred_heap_base(total_reserved, Universe::UnscaledNarrowOop); |
660978a2a31a
6791178: Specialize for zero as the compressed oop vm heap base
kvn
parents:
620
diff
changeset
|
1426 |
342 | 1427 ReservedSpace heap_rs(max_byte_size + pgs->max_size(), |
1428 HeapRegion::GrainBytes, | |
642
660978a2a31a
6791178: Specialize for zero as the compressed oop vm heap base
kvn
parents:
620
diff
changeset
|
1429 false /*ism*/, addr); |
660978a2a31a
6791178: Specialize for zero as the compressed oop vm heap base
kvn
parents:
620
diff
changeset
|
1430 |
660978a2a31a
6791178: Specialize for zero as the compressed oop vm heap base
kvn
parents:
620
diff
changeset
|
1431 if (UseCompressedOops) { |
660978a2a31a
6791178: Specialize for zero as the compressed oop vm heap base
kvn
parents:
620
diff
changeset
|
1432 if (addr != NULL && !heap_rs.is_reserved()) { |
660978a2a31a
6791178: Specialize for zero as the compressed oop vm heap base
kvn
parents:
620
diff
changeset
|
1433 // Failed to reserve at specified address - the requested memory |
660978a2a31a
6791178: Specialize for zero as the compressed oop vm heap base
kvn
parents:
620
diff
changeset
|
1434 // region is taken already, for example, by 'java' launcher. |
660978a2a31a
6791178: Specialize for zero as the compressed oop vm heap base
kvn
parents:
620
diff
changeset
|
1435 // Try again to reserver heap higher. |
660978a2a31a
6791178: Specialize for zero as the compressed oop vm heap base
kvn
parents:
620
diff
changeset
|
1436 addr = Universe::preferred_heap_base(total_reserved, Universe::ZeroBasedNarrowOop); |
660978a2a31a
6791178: Specialize for zero as the compressed oop vm heap base
kvn
parents:
620
diff
changeset
|
1437 ReservedSpace heap_rs0(total_reserved, HeapRegion::GrainBytes, |
660978a2a31a
6791178: Specialize for zero as the compressed oop vm heap base
kvn
parents:
620
diff
changeset
|
1438 false /*ism*/, addr); |
660978a2a31a
6791178: Specialize for zero as the compressed oop vm heap base
kvn
parents:
620
diff
changeset
|
1439 if (addr != NULL && !heap_rs0.is_reserved()) { |
660978a2a31a
6791178: Specialize for zero as the compressed oop vm heap base
kvn
parents:
620
diff
changeset
|
1440 // Failed to reserve at specified address again - give up. |
660978a2a31a
6791178: Specialize for zero as the compressed oop vm heap base
kvn
parents:
620
diff
changeset
|
1441 addr = Universe::preferred_heap_base(total_reserved, Universe::HeapBasedNarrowOop); |
660978a2a31a
6791178: Specialize for zero as the compressed oop vm heap base
kvn
parents:
620
diff
changeset
|
1442 assert(addr == NULL, ""); |
660978a2a31a
6791178: Specialize for zero as the compressed oop vm heap base
kvn
parents:
620
diff
changeset
|
1443 ReservedSpace heap_rs1(total_reserved, HeapRegion::GrainBytes, |
660978a2a31a
6791178: Specialize for zero as the compressed oop vm heap base
kvn
parents:
620
diff
changeset
|
1444 false /*ism*/, addr); |
660978a2a31a
6791178: Specialize for zero as the compressed oop vm heap base
kvn
parents:
620
diff
changeset
|
1445 heap_rs = heap_rs1; |
660978a2a31a
6791178: Specialize for zero as the compressed oop vm heap base
kvn
parents:
620
diff
changeset
|
1446 } else { |
660978a2a31a
6791178: Specialize for zero as the compressed oop vm heap base
kvn
parents:
620
diff
changeset
|
1447 heap_rs = heap_rs0; |
660978a2a31a
6791178: Specialize for zero as the compressed oop vm heap base
kvn
parents:
620
diff
changeset
|
1448 } |
660978a2a31a
6791178: Specialize for zero as the compressed oop vm heap base
kvn
parents:
620
diff
changeset
|
1449 } |
660978a2a31a
6791178: Specialize for zero as the compressed oop vm heap base
kvn
parents:
620
diff
changeset
|
1450 } |
342 | 1451 |
1452 if (!heap_rs.is_reserved()) { | |
1453 vm_exit_during_initialization("Could not reserve enough space for object heap"); | |
1454 return JNI_ENOMEM; | |
1455 } | |
1456 | |
1457 // It is important to do this in a way such that concurrent readers can't | |
1458 // temporarily think somethings in the heap. (I've actually seen this | |
1459 // happen in asserts: DLD.) | |
1460 _reserved.set_word_size(0); | |
1461 _reserved.set_start((HeapWord*)heap_rs.base()); | |
1462 _reserved.set_end((HeapWord*)(heap_rs.base() + heap_rs.size())); | |
1463 | |
1464 _expansion_regions = max_byte_size/HeapRegion::GrainBytes; | |
1465 | |
1466 _num_humongous_regions = 0; | |
1467 | |
1468 // Create the gen rem set (and barrier set) for the entire reserved region. | |
1469 _rem_set = collector_policy()->create_rem_set(_reserved, 2); | |
1470 set_barrier_set(rem_set()->bs()); | |
1471 if (barrier_set()->is_a(BarrierSet::ModRef)) { | |
1472 _mr_bs = (ModRefBarrierSet*)_barrier_set; | |
1473 } else { | |
1474 vm_exit_during_initialization("G1 requires a mod ref bs."); | |
1475 return JNI_ENOMEM; | |
1476 } | |
1477 | |
1478 // Also create a G1 rem set. | |
1479 if (G1UseHRIntoRS) { | |
1480 if (mr_bs()->is_a(BarrierSet::CardTableModRef)) { | |
1481 _g1_rem_set = new HRInto_G1RemSet(this, (CardTableModRefBS*)mr_bs()); | |
1482 } else { | |
1483 vm_exit_during_initialization("G1 requires a cardtable mod ref bs."); | |
1484 return JNI_ENOMEM; | |
1485 } | |
1486 } else { | |
1487 _g1_rem_set = new StupidG1RemSet(this); | |
1488 } | |
1489 | |
1490 // Carve out the G1 part of the heap. | |
1491 | |
1492 ReservedSpace g1_rs = heap_rs.first_part(max_byte_size); | |
1493 _g1_reserved = MemRegion((HeapWord*)g1_rs.base(), | |
1494 g1_rs.size()/HeapWordSize); | |
1495 ReservedSpace perm_gen_rs = heap_rs.last_part(max_byte_size); | |
1496 | |
1497 _perm_gen = pgs->init(perm_gen_rs, pgs->init_size(), rem_set()); | |
1498 | |
1499 _g1_storage.initialize(g1_rs, 0); | |
1500 _g1_committed = MemRegion((HeapWord*)_g1_storage.low(), (size_t) 0); | |
1501 _g1_max_committed = _g1_committed; | |
393 | 1502 _hrs = new HeapRegionSeq(_expansion_regions); |
342 | 1503 guarantee(_hrs != NULL, "Couldn't allocate HeapRegionSeq"); |
1504 guarantee(_cur_alloc_region == NULL, "from constructor"); | |
1505 | |
807
d44bdab1c03d
6843694: G1: assert(index < _vs.committed_size(),"bad index"), g1BlockOffsetTable.inline.hpp:55
johnc
parents:
796
diff
changeset
|
1506 // 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
|
1507 // in the remembered set structures. |
d44bdab1c03d
6843694: G1: assert(index < _vs.committed_size(),"bad index"), g1BlockOffsetTable.inline.hpp:55
johnc
parents:
796
diff
changeset
|
1508 const size_t max_region_idx = ((size_t)1 << (sizeof(RegionIdx_t)*BitsPerByte-1)) - 1; |
d44bdab1c03d
6843694: G1: assert(index < _vs.committed_size(),"bad index"), g1BlockOffsetTable.inline.hpp:55
johnc
parents:
796
diff
changeset
|
1509 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
|
1510 |
d44bdab1c03d
6843694: G1: assert(index < _vs.committed_size(),"bad index"), g1BlockOffsetTable.inline.hpp:55
johnc
parents:
796
diff
changeset
|
1511 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
|
1512 guarantee(HeapRegion::CardsPerRegion > 0, "make sure it's initialized"); |
2c79770d1f6e
6819085: G1: use larger and/or user settable region size
tonyp
parents:
941
diff
changeset
|
1513 guarantee((size_t) HeapRegion::CardsPerRegion < max_cards_per_region, |
2c79770d1f6e
6819085: G1: use larger and/or user settable region size
tonyp
parents:
941
diff
changeset
|
1514 "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
|
1515 |
342 | 1516 _bot_shared = new G1BlockOffsetSharedArray(_reserved, |
1517 heap_word_size(init_byte_size)); | |
1518 | |
1519 _g1h = this; | |
1520 | |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
1521 _in_cset_fast_test_length = max_regions(); |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
1522 _in_cset_fast_test_base = NEW_C_HEAP_ARRAY(bool, _in_cset_fast_test_length); |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
1523 |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
1524 // 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
|
1525 // 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
|
1526 // 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
|
1527 _in_cset_fast_test = _in_cset_fast_test_base - |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
1528 ((size_t) _g1_reserved.start() >> HeapRegion::LogOfHRGrainBytes); |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
1529 |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
1530 // 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
|
1531 // 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
|
1532 // evacuation pause. |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
1533 clear_cset_fast_test(); |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
1534 |
342 | 1535 // Create the ConcurrentMark data structure and thread. |
1536 // (Must do this late, so that "max_regions" is defined.) | |
1537 _cm = new ConcurrentMark(heap_rs, (int) max_regions()); | |
1538 _cmThread = _cm->cmThread(); | |
1539 | |
1540 // ...and the concurrent zero-fill thread, if necessary. | |
1541 if (G1ConcZeroFill) { | |
1542 _czft = new ConcurrentZFThread(); | |
1543 } | |
1544 | |
1545 // Initialize the from_card cache structure of HeapRegionRemSet. | |
1546 HeapRegionRemSet::init_heap(max_regions()); | |
1547 | |
677 | 1548 // Now expand into the initial heap size. |
1549 expand(init_byte_size); | |
342 | 1550 |
1551 // Perform any initialization actions delegated to the policy. | |
1552 g1_policy()->init(); | |
1553 | |
1554 g1_policy()->note_start_of_mark_thread(); | |
1555 | |
1556 _refine_cte_cl = | |
1557 new RefineCardTableEntryClosure(ConcurrentG1RefineThread::sts(), | |
1558 g1_rem_set(), | |
1559 concurrent_g1_refine()); | |
1560 JavaThread::dirty_card_queue_set().set_closure(_refine_cte_cl); | |
1561 | |
1562 JavaThread::satb_mark_queue_set().initialize(SATB_Q_CBL_mon, | |
1563 SATB_Q_FL_lock, | |
1111 | 1564 G1SATBProcessCompletedThreshold, |
342 | 1565 Shared_SATB_Q_lock); |
794 | 1566 |
1567 JavaThread::dirty_card_queue_set().initialize(DirtyCardQ_CBL_mon, | |
1568 DirtyCardQ_FL_lock, | |
1111 | 1569 concurrent_g1_refine()->yellow_zone(), |
1570 concurrent_g1_refine()->red_zone(), | |
794 | 1571 Shared_DirtyCardQ_lock); |
1572 | |
616
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
1573 if (G1DeferredRSUpdate) { |
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
1574 dirty_card_queue_set().initialize(DirtyCardQ_CBL_mon, |
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
1575 DirtyCardQ_FL_lock, |
1111 | 1576 -1, // never trigger processing |
1577 -1, // no limit on length | |
616
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
1578 Shared_DirtyCardQ_lock, |
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
1579 &JavaThread::dirty_card_queue_set()); |
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
1580 } |
1705 | 1581 |
1582 // Initialize the card queue set used to hold cards containing | |
1583 // references into the collection set. | |
1584 _into_cset_dirty_card_queue_set.initialize(DirtyCardQ_CBL_mon, | |
1585 DirtyCardQ_FL_lock, | |
1586 -1, // never trigger processing | |
1587 -1, // no limit on length | |
1588 Shared_DirtyCardQ_lock, | |
1589 &JavaThread::dirty_card_queue_set()); | |
1590 | |
342 | 1591 // In case we're keeping closure specialization stats, initialize those |
1592 // counts and that mechanism. | |
1593 SpecializationStats::clear(); | |
1594 | |
1595 _gc_alloc_region_list = NULL; | |
1596 | |
1597 // Do later initialization work for concurrent refinement. | |
1598 _cg1r->init(); | |
1599 | |
1600 return JNI_OK; | |
1601 } | |
1602 | |
1603 void G1CollectedHeap::ref_processing_init() { | |
1604 SharedHeap::ref_processing_init(); | |
1605 MemRegion mr = reserved_region(); | |
1606 _ref_processor = ReferenceProcessor::create_ref_processor( | |
1607 mr, // span | |
1608 false, // Reference discovery is not atomic | |
1609 // (though it shouldn't matter here.) | |
1610 true, // mt_discovery | |
1611 NULL, // is alive closure: need to fill this in for efficiency | |
1612 ParallelGCThreads, | |
1613 ParallelRefProcEnabled, | |
1614 true); // Setting next fields of discovered | |
1615 // lists requires a barrier. | |
1616 } | |
1617 | |
1618 size_t G1CollectedHeap::capacity() const { | |
1619 return _g1_committed.byte_size(); | |
1620 } | |
1621 | |
1705 | 1622 void G1CollectedHeap::iterate_dirty_card_closure(CardTableEntryClosure* cl, |
1623 DirtyCardQueue* into_cset_dcq, | |
1624 bool concurrent, | |
342 | 1625 int worker_i) { |
889 | 1626 // Clean cards in the hot card cache |
1705 | 1627 concurrent_g1_refine()->clean_up_cache(worker_i, g1_rem_set(), into_cset_dcq); |
889 | 1628 |
342 | 1629 DirtyCardQueueSet& dcqs = JavaThread::dirty_card_queue_set(); |
1630 int n_completed_buffers = 0; | |
1705 | 1631 while (dcqs.apply_closure_to_completed_buffer(cl, worker_i, 0, true)) { |
342 | 1632 n_completed_buffers++; |
1633 } | |
1634 g1_policy()->record_update_rs_processed_buffers(worker_i, | |
1635 (double) n_completed_buffers); | |
1636 dcqs.clear_n_completed_buffers(); | |
1637 assert(!dcqs.completed_buffers_exist_dirty(), "Completed buffers exist!"); | |
1638 } | |
1639 | |
1640 | |
1641 // Computes the sum of the storage used by the various regions. | |
1642 | |
1643 size_t G1CollectedHeap::used() const { | |
862
36b5611220a7
6863216: Clean up debugging debris inadvertently pushed with 6700789
ysr
parents:
861
diff
changeset
|
1644 assert(Heap_lock->owner() != NULL, |
36b5611220a7
6863216: Clean up debugging debris inadvertently pushed with 6700789
ysr
parents:
861
diff
changeset
|
1645 "Should be owned on this thread's behalf."); |
342 | 1646 size_t result = _summary_bytes_used; |
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1647 // Read only once in case it is set to NULL concurrently |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1648 HeapRegion* hr = _cur_alloc_region; |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1649 if (hr != NULL) |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1650 result += hr->used(); |
342 | 1651 return result; |
1652 } | |
1653 | |
846
42d84bbbecf4
6859911: G1: assert(Heap_lock->owner() = NULL, "Should be owned on this thread's behalf")
tonyp
parents:
845
diff
changeset
|
1654 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
|
1655 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
|
1656 return result; |
42d84bbbecf4
6859911: G1: assert(Heap_lock->owner() = NULL, "Should be owned on this thread's behalf")
tonyp
parents:
845
diff
changeset
|
1657 } |
42d84bbbecf4
6859911: G1: assert(Heap_lock->owner() = NULL, "Should be owned on this thread's behalf")
tonyp
parents:
845
diff
changeset
|
1658 |
342 | 1659 class SumUsedClosure: public HeapRegionClosure { |
1660 size_t _used; | |
1661 public: | |
1662 SumUsedClosure() : _used(0) {} | |
1663 bool doHeapRegion(HeapRegion* r) { | |
1664 if (!r->continuesHumongous()) { | |
1665 _used += r->used(); | |
1666 } | |
1667 return false; | |
1668 } | |
1669 size_t result() { return _used; } | |
1670 }; | |
1671 | |
1672 size_t G1CollectedHeap::recalculate_used() const { | |
1673 SumUsedClosure blk; | |
1674 _hrs->iterate(&blk); | |
1675 return blk.result(); | |
1676 } | |
1677 | |
1678 #ifndef PRODUCT | |
1679 class SumUsedRegionsClosure: public HeapRegionClosure { | |
1680 size_t _num; | |
1681 public: | |
677 | 1682 SumUsedRegionsClosure() : _num(0) {} |
342 | 1683 bool doHeapRegion(HeapRegion* r) { |
1684 if (r->continuesHumongous() || r->used() > 0 || r->is_gc_alloc_region()) { | |
1685 _num += 1; | |
1686 } | |
1687 return false; | |
1688 } | |
1689 size_t result() { return _num; } | |
1690 }; | |
1691 | |
1692 size_t G1CollectedHeap::recalculate_used_regions() const { | |
1693 SumUsedRegionsClosure blk; | |
1694 _hrs->iterate(&blk); | |
1695 return blk.result(); | |
1696 } | |
1697 #endif // PRODUCT | |
1698 | |
1699 size_t G1CollectedHeap::unsafe_max_alloc() { | |
1700 if (_free_regions > 0) return HeapRegion::GrainBytes; | |
1701 // otherwise, is there space in the current allocation region? | |
1702 | |
1703 // We need to store the current allocation region in a local variable | |
1704 // here. The problem is that this method doesn't take any locks and | |
1705 // there may be other threads which overwrite the current allocation | |
1706 // region field. attempt_allocation(), for example, sets it to NULL | |
1707 // and this can happen *after* the NULL check here but before the call | |
1708 // to free(), resulting in a SIGSEGV. Note that this doesn't appear | |
1709 // to be a problem in the optimized build, since the two loads of the | |
1710 // current allocation region field are optimized away. | |
1711 HeapRegion* car = _cur_alloc_region; | |
1712 | |
1713 // FIXME: should iterate over all regions? | |
1714 if (car == NULL) { | |
1715 return 0; | |
1716 } | |
1717 return car->free(); | |
1718 } | |
1719 | |
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
1720 bool G1CollectedHeap::should_do_concurrent_full_gc(GCCause::Cause cause) { |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
1721 return |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
1722 ((cause == GCCause::_gc_locker && GCLockerInvokesConcurrent) || |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
1723 (cause == GCCause::_java_lang_system_gc && ExplicitGCInvokesConcurrent)); |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
1724 } |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
1725 |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
1726 void G1CollectedHeap::increment_full_collections_completed(bool outer) { |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
1727 MonitorLockerEx x(FullGCCount_lock, Mutex::_no_safepoint_check_flag); |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
1728 |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
1729 // We have already incremented _total_full_collections at the start |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
1730 // of the GC, so total_full_collections() represents how many full |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
1731 // collections have been started. |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
1732 unsigned int full_collections_started = total_full_collections(); |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
1733 |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
1734 // 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
|
1735 // 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
|
1736 // interrupt a concurrent cycle), the number of full collections |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
1737 // 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
|
1738 // 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
|
1739 // behind the number of full collections started. |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
1740 |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
1741 // This is the case for the inner caller, i.e. a Full GC. |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
1742 assert(outer || |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
1743 (full_collections_started == _full_collections_completed + 1) || |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
1744 (full_collections_started == _full_collections_completed + 2), |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
1745 err_msg("for inner caller: full_collections_started = %u " |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
1746 "is inconsistent with _full_collections_completed = %u", |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
1747 full_collections_started, _full_collections_completed)); |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
1748 |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
1749 // This is the case for the outer caller, i.e. the concurrent cycle. |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
1750 assert(!outer || |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
1751 (full_collections_started == _full_collections_completed + 1), |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
1752 err_msg("for outer caller: full_collections_started = %u " |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
1753 "is inconsistent with _full_collections_completed = %u", |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
1754 full_collections_started, _full_collections_completed)); |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
1755 |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
1756 _full_collections_completed += 1; |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
1757 |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
1758 // 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
|
1759 // System.gc() with (with ExplicitGCInvokesConcurrent set or not) |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
1760 // 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
|
1761 // waiting in VM_G1IncCollectionPause::doit_epilogue(). |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
1762 FullGCCount_lock->notify_all(); |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
1763 } |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
1764 |
342 | 1765 void G1CollectedHeap::collect_as_vm_thread(GCCause::Cause cause) { |
1766 assert(Thread::current()->is_VM_thread(), "Precondition#1"); | |
1767 assert(Heap_lock->is_locked(), "Precondition#2"); | |
1768 GCCauseSetter gcs(this, cause); | |
1769 switch (cause) { | |
1770 case GCCause::_heap_inspection: | |
1771 case GCCause::_heap_dump: { | |
1772 HandleMark hm; | |
1773 do_full_collection(false); // don't clear all soft refs | |
1774 break; | |
1775 } | |
1776 default: // XXX FIX ME | |
1777 ShouldNotReachHere(); // Unexpected use of this function | |
1778 } | |
1779 } | |
1780 | |
1088
3fc996d4edd2
6902303: G1: ScavengeALot should cause an incremental, rather than a full, collection
ysr
parents:
1045
diff
changeset
|
1781 void G1CollectedHeap::collect(GCCause::Cause cause) { |
3fc996d4edd2
6902303: G1: ScavengeALot should cause an incremental, rather than a full, collection
ysr
parents:
1045
diff
changeset
|
1782 // The caller doesn't have the Heap_lock |
3fc996d4edd2
6902303: G1: ScavengeALot should cause an incremental, rather than a full, collection
ysr
parents:
1045
diff
changeset
|
1783 assert(!Heap_lock->owned_by_self(), "this thread should not own the Heap_lock"); |
3fc996d4edd2
6902303: G1: ScavengeALot should cause an incremental, rather than a full, collection
ysr
parents:
1045
diff
changeset
|
1784 |
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
1785 unsigned int gc_count_before; |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
1786 unsigned int full_gc_count_before; |
342 | 1787 { |
1088
3fc996d4edd2
6902303: G1: ScavengeALot should cause an incremental, rather than a full, collection
ysr
parents:
1045
diff
changeset
|
1788 MutexLocker ml(Heap_lock); |
3fc996d4edd2
6902303: G1: ScavengeALot should cause an incremental, rather than a full, collection
ysr
parents:
1045
diff
changeset
|
1789 // Read the GC count while holding the Heap_lock |
3fc996d4edd2
6902303: G1: ScavengeALot should cause an incremental, rather than a full, collection
ysr
parents:
1045
diff
changeset
|
1790 gc_count_before = SharedHeap::heap()->total_collections(); |
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
1791 full_gc_count_before = SharedHeap::heap()->total_full_collections(); |
1088
3fc996d4edd2
6902303: G1: ScavengeALot should cause an incremental, rather than a full, collection
ysr
parents:
1045
diff
changeset
|
1792 |
3fc996d4edd2
6902303: G1: ScavengeALot should cause an incremental, rather than a full, collection
ysr
parents:
1045
diff
changeset
|
1793 // Don't want to do a GC until cleanup is completed. |
3fc996d4edd2
6902303: G1: ScavengeALot should cause an incremental, rather than a full, collection
ysr
parents:
1045
diff
changeset
|
1794 wait_for_cleanup_complete(); |
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
1795 |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
1796 // We give up heap lock; VMThread::execute gets it back below |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
1797 } |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
1798 |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
1799 if (should_do_concurrent_full_gc(cause)) { |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
1800 // Schedule an initial-mark evacuation pause that will start a |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
1801 // concurrent cycle. |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
1802 VM_G1IncCollectionPause op(gc_count_before, |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
1803 true, /* should_initiate_conc_mark */ |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
1804 g1_policy()->max_pause_time_ms(), |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
1805 cause); |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
1806 VMThread::execute(&op); |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
1807 } else { |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
1808 if (cause == GCCause::_gc_locker |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
1809 DEBUG_ONLY(|| cause == GCCause::_scavenge_alot)) { |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
1810 |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
1811 // Schedule a standard evacuation pause. |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
1812 VM_G1IncCollectionPause op(gc_count_before, |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
1813 false, /* should_initiate_conc_mark */ |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
1814 g1_policy()->max_pause_time_ms(), |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
1815 cause); |
1088
3fc996d4edd2
6902303: G1: ScavengeALot should cause an incremental, rather than a full, collection
ysr
parents:
1045
diff
changeset
|
1816 VMThread::execute(&op); |
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
1817 } else { |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
1818 // Schedule a Full GC. |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
1819 VM_G1CollectFull op(gc_count_before, full_gc_count_before, cause); |
1088
3fc996d4edd2
6902303: G1: ScavengeALot should cause an incremental, rather than a full, collection
ysr
parents:
1045
diff
changeset
|
1820 VMThread::execute(&op); |
3fc996d4edd2
6902303: G1: ScavengeALot should cause an incremental, rather than a full, collection
ysr
parents:
1045
diff
changeset
|
1821 } |
342 | 1822 } |
1823 } | |
1824 | |
1825 bool G1CollectedHeap::is_in(const void* p) const { | |
1826 if (_g1_committed.contains(p)) { | |
1827 HeapRegion* hr = _hrs->addr_to_region(p); | |
1828 return hr->is_in(p); | |
1829 } else { | |
1830 return _perm_gen->as_gen()->is_in(p); | |
1831 } | |
1832 } | |
1833 | |
1834 // Iteration functions. | |
1835 | |
1836 // Iterates an OopClosure over all ref-containing fields of objects | |
1837 // within a HeapRegion. | |
1838 | |
1839 class IterateOopClosureRegionClosure: public HeapRegionClosure { | |
1840 MemRegion _mr; | |
1841 OopClosure* _cl; | |
1842 public: | |
1843 IterateOopClosureRegionClosure(MemRegion mr, OopClosure* cl) | |
1844 : _mr(mr), _cl(cl) {} | |
1845 bool doHeapRegion(HeapRegion* r) { | |
1846 if (! r->continuesHumongous()) { | |
1847 r->oop_iterate(_cl); | |
1848 } | |
1849 return false; | |
1850 } | |
1851 }; | |
1852 | |
678 | 1853 void G1CollectedHeap::oop_iterate(OopClosure* cl, bool do_perm) { |
342 | 1854 IterateOopClosureRegionClosure blk(_g1_committed, cl); |
1855 _hrs->iterate(&blk); | |
678 | 1856 if (do_perm) { |
1857 perm_gen()->oop_iterate(cl); | |
1858 } | |
342 | 1859 } |
1860 | |
678 | 1861 void G1CollectedHeap::oop_iterate(MemRegion mr, OopClosure* cl, bool do_perm) { |
342 | 1862 IterateOopClosureRegionClosure blk(mr, cl); |
1863 _hrs->iterate(&blk); | |
678 | 1864 if (do_perm) { |
1865 perm_gen()->oop_iterate(cl); | |
1866 } | |
342 | 1867 } |
1868 | |
1869 // Iterates an ObjectClosure over all objects within a HeapRegion. | |
1870 | |
1871 class IterateObjectClosureRegionClosure: public HeapRegionClosure { | |
1872 ObjectClosure* _cl; | |
1873 public: | |
1874 IterateObjectClosureRegionClosure(ObjectClosure* cl) : _cl(cl) {} | |
1875 bool doHeapRegion(HeapRegion* r) { | |
1876 if (! r->continuesHumongous()) { | |
1877 r->object_iterate(_cl); | |
1878 } | |
1879 return false; | |
1880 } | |
1881 }; | |
1882 | |
678 | 1883 void G1CollectedHeap::object_iterate(ObjectClosure* cl, bool do_perm) { |
342 | 1884 IterateObjectClosureRegionClosure blk(cl); |
1885 _hrs->iterate(&blk); | |
678 | 1886 if (do_perm) { |
1887 perm_gen()->object_iterate(cl); | |
1888 } | |
342 | 1889 } |
1890 | |
1891 void G1CollectedHeap::object_iterate_since_last_GC(ObjectClosure* cl) { | |
1892 // FIXME: is this right? | |
1893 guarantee(false, "object_iterate_since_last_GC not supported by G1 heap"); | |
1894 } | |
1895 | |
1896 // Calls a SpaceClosure on a HeapRegion. | |
1897 | |
1898 class SpaceClosureRegionClosure: public HeapRegionClosure { | |
1899 SpaceClosure* _cl; | |
1900 public: | |
1901 SpaceClosureRegionClosure(SpaceClosure* cl) : _cl(cl) {} | |
1902 bool doHeapRegion(HeapRegion* r) { | |
1903 _cl->do_space(r); | |
1904 return false; | |
1905 } | |
1906 }; | |
1907 | |
1908 void G1CollectedHeap::space_iterate(SpaceClosure* cl) { | |
1909 SpaceClosureRegionClosure blk(cl); | |
1910 _hrs->iterate(&blk); | |
1911 } | |
1912 | |
1913 void G1CollectedHeap::heap_region_iterate(HeapRegionClosure* cl) { | |
1914 _hrs->iterate(cl); | |
1915 } | |
1916 | |
1917 void G1CollectedHeap::heap_region_iterate_from(HeapRegion* r, | |
1918 HeapRegionClosure* cl) { | |
1919 _hrs->iterate_from(r, cl); | |
1920 } | |
1921 | |
1922 void | |
1923 G1CollectedHeap::heap_region_iterate_from(int idx, HeapRegionClosure* cl) { | |
1924 _hrs->iterate_from(idx, cl); | |
1925 } | |
1926 | |
1927 HeapRegion* G1CollectedHeap::region_at(size_t idx) { return _hrs->at(idx); } | |
1928 | |
1929 void | |
1930 G1CollectedHeap::heap_region_par_iterate_chunked(HeapRegionClosure* cl, | |
1931 int worker, | |
1932 jint claim_value) { | |
355 | 1933 const size_t regions = n_regions(); |
1934 const size_t worker_num = (ParallelGCThreads > 0 ? ParallelGCThreads : 1); | |
1935 // try to spread out the starting points of the workers | |
1936 const size_t start_index = regions / worker_num * (size_t) worker; | |
1937 | |
1938 // each worker will actually look at all regions | |
1939 for (size_t count = 0; count < regions; ++count) { | |
1940 const size_t index = (start_index + count) % regions; | |
1941 assert(0 <= index && index < regions, "sanity"); | |
1942 HeapRegion* r = region_at(index); | |
1943 // we'll ignore "continues humongous" regions (we'll process them | |
1944 // when we come across their corresponding "start humongous" | |
1945 // region) and regions already claimed | |
1946 if (r->claim_value() == claim_value || r->continuesHumongous()) { | |
1947 continue; | |
1948 } | |
1949 // OK, try to claim it | |
342 | 1950 if (r->claimHeapRegion(claim_value)) { |
355 | 1951 // success! |
1952 assert(!r->continuesHumongous(), "sanity"); | |
1953 if (r->startsHumongous()) { | |
1954 // If the region is "starts humongous" we'll iterate over its | |
1955 // "continues humongous" first; in fact we'll do them | |
1956 // first. The order is important. In on case, calling the | |
1957 // closure on the "starts humongous" region might de-allocate | |
1958 // and clear all its "continues humongous" regions and, as a | |
1959 // result, we might end up processing them twice. So, we'll do | |
1960 // them first (notice: most closures will ignore them anyway) and | |
1961 // then we'll do the "starts humongous" region. | |
1962 for (size_t ch_index = index + 1; ch_index < regions; ++ch_index) { | |
1963 HeapRegion* chr = region_at(ch_index); | |
1964 | |
1965 // if the region has already been claimed or it's not | |
1966 // "continues humongous" we're done | |
1967 if (chr->claim_value() == claim_value || | |
1968 !chr->continuesHumongous()) { | |
1969 break; | |
1970 } | |
1971 | |
1972 // Noone should have claimed it directly. We can given | |
1973 // that we claimed its "starts humongous" region. | |
1974 assert(chr->claim_value() != claim_value, "sanity"); | |
1975 assert(chr->humongous_start_region() == r, "sanity"); | |
1976 | |
1977 if (chr->claimHeapRegion(claim_value)) { | |
1978 // we should always be able to claim it; noone else should | |
1979 // be trying to claim this region | |
1980 | |
1981 bool res2 = cl->doHeapRegion(chr); | |
1982 assert(!res2, "Should not abort"); | |
1983 | |
1984 // Right now, this holds (i.e., no closure that actually | |
1985 // does something with "continues humongous" regions | |
1986 // clears them). We might have to weaken it in the future, | |
1987 // but let's leave these two asserts here for extra safety. | |
1988 assert(chr->continuesHumongous(), "should still be the case"); | |
1989 assert(chr->humongous_start_region() == r, "sanity"); | |
1990 } else { | |
1991 guarantee(false, "we should not reach here"); | |
1992 } | |
1993 } | |
1994 } | |
1995 | |
1996 assert(!r->continuesHumongous(), "sanity"); | |
1997 bool res = cl->doHeapRegion(r); | |
1998 assert(!res, "Should not abort"); | |
1999 } | |
2000 } | |
2001 } | |
2002 | |
390 | 2003 class ResetClaimValuesClosure: public HeapRegionClosure { |
2004 public: | |
2005 bool doHeapRegion(HeapRegion* r) { | |
2006 r->set_claim_value(HeapRegion::InitialClaimValue); | |
2007 return false; | |
2008 } | |
2009 }; | |
2010 | |
2011 void | |
2012 G1CollectedHeap::reset_heap_region_claim_values() { | |
2013 ResetClaimValuesClosure blk; | |
2014 heap_region_iterate(&blk); | |
2015 } | |
2016 | |
355 | 2017 #ifdef ASSERT |
2018 // This checks whether all regions in the heap have the correct claim | |
2019 // value. I also piggy-backed on this a check to ensure that the | |
2020 // humongous_start_region() information on "continues humongous" | |
2021 // regions is correct. | |
2022 | |
2023 class CheckClaimValuesClosure : public HeapRegionClosure { | |
2024 private: | |
2025 jint _claim_value; | |
2026 size_t _failures; | |
2027 HeapRegion* _sh_region; | |
2028 public: | |
2029 CheckClaimValuesClosure(jint claim_value) : | |
2030 _claim_value(claim_value), _failures(0), _sh_region(NULL) { } | |
2031 bool doHeapRegion(HeapRegion* r) { | |
2032 if (r->claim_value() != _claim_value) { | |
2033 gclog_or_tty->print_cr("Region ["PTR_FORMAT","PTR_FORMAT"), " | |
2034 "claim value = %d, should be %d", | |
2035 r->bottom(), r->end(), r->claim_value(), | |
2036 _claim_value); | |
2037 ++_failures; | |
2038 } | |
2039 if (!r->isHumongous()) { | |
2040 _sh_region = NULL; | |
2041 } else if (r->startsHumongous()) { | |
2042 _sh_region = r; | |
2043 } else if (r->continuesHumongous()) { | |
2044 if (r->humongous_start_region() != _sh_region) { | |
2045 gclog_or_tty->print_cr("Region ["PTR_FORMAT","PTR_FORMAT"), " | |
2046 "HS = "PTR_FORMAT", should be "PTR_FORMAT, | |
2047 r->bottom(), r->end(), | |
2048 r->humongous_start_region(), | |
2049 _sh_region); | |
2050 ++_failures; | |
342 | 2051 } |
2052 } | |
355 | 2053 return false; |
2054 } | |
2055 size_t failures() { | |
2056 return _failures; | |
2057 } | |
2058 }; | |
2059 | |
2060 bool G1CollectedHeap::check_heap_region_claim_values(jint claim_value) { | |
2061 CheckClaimValuesClosure cl(claim_value); | |
2062 heap_region_iterate(&cl); | |
2063 return cl.failures() == 0; | |
2064 } | |
2065 #endif // ASSERT | |
342 | 2066 |
2067 void G1CollectedHeap::collection_set_iterate(HeapRegionClosure* cl) { | |
2068 HeapRegion* r = g1_policy()->collection_set(); | |
2069 while (r != NULL) { | |
2070 HeapRegion* next = r->next_in_collection_set(); | |
2071 if (cl->doHeapRegion(r)) { | |
2072 cl->incomplete(); | |
2073 return; | |
2074 } | |
2075 r = next; | |
2076 } | |
2077 } | |
2078 | |
2079 void G1CollectedHeap::collection_set_iterate_from(HeapRegion* r, | |
2080 HeapRegionClosure *cl) { | |
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2081 if (r == NULL) { |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2082 // 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
|
2083 return; |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2084 } |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2085 |
342 | 2086 assert(r->in_collection_set(), |
2087 "Start region must be a member of the collection set."); | |
2088 HeapRegion* cur = r; | |
2089 while (cur != NULL) { | |
2090 HeapRegion* next = cur->next_in_collection_set(); | |
2091 if (cl->doHeapRegion(cur) && false) { | |
2092 cl->incomplete(); | |
2093 return; | |
2094 } | |
2095 cur = next; | |
2096 } | |
2097 cur = g1_policy()->collection_set(); | |
2098 while (cur != r) { | |
2099 HeapRegion* next = cur->next_in_collection_set(); | |
2100 if (cl->doHeapRegion(cur) && false) { | |
2101 cl->incomplete(); | |
2102 return; | |
2103 } | |
2104 cur = next; | |
2105 } | |
2106 } | |
2107 | |
2108 CompactibleSpace* G1CollectedHeap::first_compactible_space() { | |
2109 return _hrs->length() > 0 ? _hrs->at(0) : NULL; | |
2110 } | |
2111 | |
2112 | |
2113 Space* G1CollectedHeap::space_containing(const void* addr) const { | |
2114 Space* res = heap_region_containing(addr); | |
2115 if (res == NULL) | |
2116 res = perm_gen()->space_containing(addr); | |
2117 return res; | |
2118 } | |
2119 | |
2120 HeapWord* G1CollectedHeap::block_start(const void* addr) const { | |
2121 Space* sp = space_containing(addr); | |
2122 if (sp != NULL) { | |
2123 return sp->block_start(addr); | |
2124 } | |
2125 return NULL; | |
2126 } | |
2127 | |
2128 size_t G1CollectedHeap::block_size(const HeapWord* addr) const { | |
2129 Space* sp = space_containing(addr); | |
2130 assert(sp != NULL, "block_size of address outside of heap"); | |
2131 return sp->block_size(addr); | |
2132 } | |
2133 | |
2134 bool G1CollectedHeap::block_is_obj(const HeapWord* addr) const { | |
2135 Space* sp = space_containing(addr); | |
2136 return sp->block_is_obj(addr); | |
2137 } | |
2138 | |
2139 bool G1CollectedHeap::supports_tlab_allocation() const { | |
2140 return true; | |
2141 } | |
2142 | |
2143 size_t G1CollectedHeap::tlab_capacity(Thread* ignored) const { | |
2144 return HeapRegion::GrainBytes; | |
2145 } | |
2146 | |
2147 size_t G1CollectedHeap::unsafe_max_tlab_alloc(Thread* ignored) const { | |
2148 // Return the remaining space in the cur alloc region, but not less than | |
2149 // the min TLAB size. | |
1313
664ae0c5e0e5
6755988: G1: assert(new_obj != 0 || ... "should be forwarded")
johnc
parents:
1282
diff
changeset
|
2150 |
664ae0c5e0e5
6755988: G1: assert(new_obj != 0 || ... "should be forwarded")
johnc
parents:
1282
diff
changeset
|
2151 // 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
|
2152 // 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
|
2153 // humongous objects. |
664ae0c5e0e5
6755988: G1: assert(new_obj != 0 || ... "should be forwarded")
johnc
parents:
1282
diff
changeset
|
2154 |
664ae0c5e0e5
6755988: G1: assert(new_obj != 0 || ... "should be forwarded")
johnc
parents:
1282
diff
changeset
|
2155 // We need to store the cur alloc region locally, since it might change |
664ae0c5e0e5
6755988: G1: assert(new_obj != 0 || ... "should be forwarded")
johnc
parents:
1282
diff
changeset
|
2156 // between when we test for NULL and when we use it later. |
342 | 2157 ContiguousSpace* cur_alloc_space = _cur_alloc_region; |
1313
664ae0c5e0e5
6755988: G1: assert(new_obj != 0 || ... "should be forwarded")
johnc
parents:
1282
diff
changeset
|
2158 size_t max_tlab_size = _humongous_object_threshold_in_words * wordSize; |
664ae0c5e0e5
6755988: G1: assert(new_obj != 0 || ... "should be forwarded")
johnc
parents:
1282
diff
changeset
|
2159 |
342 | 2160 if (cur_alloc_space == NULL) { |
1313
664ae0c5e0e5
6755988: G1: assert(new_obj != 0 || ... "should be forwarded")
johnc
parents:
1282
diff
changeset
|
2161 return max_tlab_size; |
342 | 2162 } else { |
1313
664ae0c5e0e5
6755988: G1: assert(new_obj != 0 || ... "should be forwarded")
johnc
parents:
1282
diff
changeset
|
2163 return MIN2(MAX2(cur_alloc_space->free(), (size_t)MinTLABSize), |
664ae0c5e0e5
6755988: G1: assert(new_obj != 0 || ... "should be forwarded")
johnc
parents:
1282
diff
changeset
|
2164 max_tlab_size); |
342 | 2165 } |
2166 } | |
2167 | |
2168 HeapWord* G1CollectedHeap::allocate_new_tlab(size_t size) { | |
2169 bool dummy; | |
2170 return G1CollectedHeap::mem_allocate(size, false, true, &dummy); | |
2171 } | |
2172 | |
2173 bool G1CollectedHeap::allocs_are_zero_filled() { | |
2174 return false; | |
2175 } | |
2176 | |
2177 size_t G1CollectedHeap::large_typearray_limit() { | |
2178 // FIXME | |
2179 return HeapRegion::GrainBytes/HeapWordSize; | |
2180 } | |
2181 | |
2182 size_t G1CollectedHeap::max_capacity() const { | |
1092
ed52bcc32739
6880903: G1: G1 reports incorrect Runtime.maxMemory()
tonyp
parents:
1089
diff
changeset
|
2183 return g1_reserved_obj_bytes(); |
342 | 2184 } |
2185 | |
2186 jlong G1CollectedHeap::millis_since_last_gc() { | |
2187 // assert(false, "NYI"); | |
2188 return 0; | |
2189 } | |
2190 | |
2191 | |
2192 void G1CollectedHeap::prepare_for_verify() { | |
2193 if (SafepointSynchronize::is_at_safepoint() || ! UseTLAB) { | |
2194 ensure_parsability(false); | |
2195 } | |
2196 g1_rem_set()->prepare_for_verify(); | |
2197 } | |
2198 | |
2199 class VerifyLivenessOopClosure: public OopClosure { | |
2200 G1CollectedHeap* g1h; | |
2201 public: | |
2202 VerifyLivenessOopClosure(G1CollectedHeap* _g1h) { | |
2203 g1h = _g1h; | |
2204 } | |
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
2205 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
|
2206 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
|
2207 |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
2208 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
|
2209 oop obj = oopDesc::load_decode_heap_oop(p); |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
2210 guarantee(obj == NULL || !g1h->is_obj_dead(obj), |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
2211 "Dead object referenced by a not dead object"); |
342 | 2212 } |
2213 }; | |
2214 | |
2215 class VerifyObjsInRegionClosure: public ObjectClosure { | |
811 | 2216 private: |
342 | 2217 G1CollectedHeap* _g1h; |
2218 size_t _live_bytes; | |
2219 HeapRegion *_hr; | |
811 | 2220 bool _use_prev_marking; |
342 | 2221 public: |
811 | 2222 // use_prev_marking == true -> use "prev" marking information, |
2223 // use_prev_marking == false -> use "next" marking information | |
2224 VerifyObjsInRegionClosure(HeapRegion *hr, bool use_prev_marking) | |
2225 : _live_bytes(0), _hr(hr), _use_prev_marking(use_prev_marking) { | |
342 | 2226 _g1h = G1CollectedHeap::heap(); |
2227 } | |
2228 void do_object(oop o) { | |
2229 VerifyLivenessOopClosure isLive(_g1h); | |
2230 assert(o != NULL, "Huh?"); | |
811 | 2231 if (!_g1h->is_obj_dead_cond(o, _use_prev_marking)) { |
342 | 2232 o->oop_iterate(&isLive); |
1389
5dbd9300cf9c
6943926: G1: Integer overflow during heap region verification
johnc
parents:
1388
diff
changeset
|
2233 if (!_hr->obj_allocated_since_prev_marking(o)) { |
5dbd9300cf9c
6943926: G1: Integer overflow during heap region verification
johnc
parents:
1388
diff
changeset
|
2234 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
|
2235 _live_bytes += (obj_size * HeapWordSize); |
5dbd9300cf9c
6943926: G1: Integer overflow during heap region verification
johnc
parents:
1388
diff
changeset
|
2236 } |
342 | 2237 } |
2238 } | |
2239 size_t live_bytes() { return _live_bytes; } | |
2240 }; | |
2241 | |
2242 class PrintObjsInRegionClosure : public ObjectClosure { | |
2243 HeapRegion *_hr; | |
2244 G1CollectedHeap *_g1; | |
2245 public: | |
2246 PrintObjsInRegionClosure(HeapRegion *hr) : _hr(hr) { | |
2247 _g1 = G1CollectedHeap::heap(); | |
2248 }; | |
2249 | |
2250 void do_object(oop o) { | |
2251 if (o != NULL) { | |
2252 HeapWord *start = (HeapWord *) o; | |
2253 size_t word_sz = o->size(); | |
2254 gclog_or_tty->print("\nPrinting obj "PTR_FORMAT" of size " SIZE_FORMAT | |
2255 " isMarkedPrev %d isMarkedNext %d isAllocSince %d\n", | |
2256 (void*) o, word_sz, | |
2257 _g1->isMarkedPrev(o), | |
2258 _g1->isMarkedNext(o), | |
2259 _hr->obj_allocated_since_prev_marking(o)); | |
2260 HeapWord *end = start + word_sz; | |
2261 HeapWord *cur; | |
2262 int *val; | |
2263 for (cur = start; cur < end; cur++) { | |
2264 val = (int *) cur; | |
2265 gclog_or_tty->print("\t "PTR_FORMAT":"PTR_FORMAT"\n", val, *val); | |
2266 } | |
2267 } | |
2268 } | |
2269 }; | |
2270 | |
2271 class VerifyRegionClosure: public HeapRegionClosure { | |
811 | 2272 private: |
342 | 2273 bool _allow_dirty; |
390 | 2274 bool _par; |
811 | 2275 bool _use_prev_marking; |
1020
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
2276 bool _failures; |
811 | 2277 public: |
2278 // use_prev_marking == true -> use "prev" marking information, | |
2279 // use_prev_marking == false -> use "next" marking information | |
2280 VerifyRegionClosure(bool allow_dirty, bool par, bool use_prev_marking) | |
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
2281 : _allow_dirty(allow_dirty), |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
2282 _par(par), |
1020
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
2283 _use_prev_marking(use_prev_marking), |
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
2284 _failures(false) {} |
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
2285 |
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
2286 bool failures() { |
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
2287 return _failures; |
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
2288 } |
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
2289 |
342 | 2290 bool doHeapRegion(HeapRegion* r) { |
390 | 2291 guarantee(_par || r->claim_value() == HeapRegion::InitialClaimValue, |
2292 "Should be unclaimed at verify points."); | |
637
25e146966e7c
6817419: G1: Enable extensive verification for humongous regions
iveresov
parents:
636
diff
changeset
|
2293 if (!r->continuesHumongous()) { |
1020
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
2294 bool failures = false; |
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
2295 r->verify(_allow_dirty, _use_prev_marking, &failures); |
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
2296 if (failures) { |
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
2297 _failures = true; |
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
2298 } else { |
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
2299 VerifyObjsInRegionClosure not_dead_yet_cl(r, _use_prev_marking); |
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
2300 r->object_iterate(¬_dead_yet_cl); |
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
2301 if (r->max_live_bytes() < not_dead_yet_cl.live_bytes()) { |
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
2302 gclog_or_tty->print_cr("["PTR_FORMAT","PTR_FORMAT"] " |
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
2303 "max_live_bytes "SIZE_FORMAT" " |
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
2304 "< calculated "SIZE_FORMAT, |
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
2305 r->bottom(), r->end(), |
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
2306 r->max_live_bytes(), |
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
2307 not_dead_yet_cl.live_bytes()); |
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
2308 _failures = true; |
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
2309 } |
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
2310 } |
342 | 2311 } |
1020
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
2312 return false; // stop the region iteration if we hit a failure |
342 | 2313 } |
2314 }; | |
2315 | |
2316 class VerifyRootsClosure: public OopsInGenClosure { | |
2317 private: | |
2318 G1CollectedHeap* _g1h; | |
1020
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
2319 bool _use_prev_marking; |
342 | 2320 bool _failures; |
2321 public: | |
811 | 2322 // use_prev_marking == true -> use "prev" marking information, |
2323 // use_prev_marking == false -> use "next" marking information | |
2324 VerifyRootsClosure(bool use_prev_marking) : | |
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
2325 _g1h(G1CollectedHeap::heap()), |
1020
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
2326 _use_prev_marking(use_prev_marking), |
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
2327 _failures(false) { } |
342 | 2328 |
2329 bool failures() { return _failures; } | |
2330 | |
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
2331 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
|
2332 T heap_oop = oopDesc::load_heap_oop(p); |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
2333 if (!oopDesc::is_null(heap_oop)) { |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
2334 oop obj = oopDesc::decode_heap_oop_not_null(heap_oop); |
811 | 2335 if (_g1h->is_obj_dead_cond(obj, _use_prev_marking)) { |
342 | 2336 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
|
2337 "points to dead obj "PTR_FORMAT, p, (void*) obj); |
342 | 2338 obj->print_on(gclog_or_tty); |
2339 _failures = true; | |
2340 } | |
2341 } | |
2342 } | |
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
2343 |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
2344 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
|
2345 void do_oop(narrowOop* p) { do_oop_nv(p); } |
342 | 2346 }; |
2347 | |
390 | 2348 // This is the task used for parallel heap verification. |
2349 | |
2350 class G1ParVerifyTask: public AbstractGangTask { | |
2351 private: | |
2352 G1CollectedHeap* _g1h; | |
2353 bool _allow_dirty; | |
811 | 2354 bool _use_prev_marking; |
1020
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
2355 bool _failures; |
390 | 2356 |
2357 public: | |
811 | 2358 // use_prev_marking == true -> use "prev" marking information, |
2359 // use_prev_marking == false -> use "next" marking information | |
2360 G1ParVerifyTask(G1CollectedHeap* g1h, bool allow_dirty, | |
2361 bool use_prev_marking) : | |
390 | 2362 AbstractGangTask("Parallel verify task"), |
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
2363 _g1h(g1h), |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
2364 _allow_dirty(allow_dirty), |
1020
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
2365 _use_prev_marking(use_prev_marking), |
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
2366 _failures(false) { } |
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
2367 |
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
2368 bool failures() { |
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
2369 return _failures; |
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
2370 } |
390 | 2371 |
2372 void work(int worker_i) { | |
637
25e146966e7c
6817419: G1: Enable extensive verification for humongous regions
iveresov
parents:
636
diff
changeset
|
2373 HandleMark hm; |
811 | 2374 VerifyRegionClosure blk(_allow_dirty, true, _use_prev_marking); |
390 | 2375 _g1h->heap_region_par_iterate_chunked(&blk, worker_i, |
2376 HeapRegion::ParVerifyClaimValue); | |
1020
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
2377 if (blk.failures()) { |
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
2378 _failures = true; |
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
2379 } |
390 | 2380 } |
2381 }; | |
2382 | |
342 | 2383 void G1CollectedHeap::verify(bool allow_dirty, bool silent) { |
811 | 2384 verify(allow_dirty, silent, /* use_prev_marking */ true); |
2385 } | |
2386 | |
2387 void G1CollectedHeap::verify(bool allow_dirty, | |
2388 bool silent, | |
2389 bool use_prev_marking) { | |
342 | 2390 if (SafepointSynchronize::is_at_safepoint() || ! UseTLAB) { |
2391 if (!silent) { gclog_or_tty->print("roots "); } | |
811 | 2392 VerifyRootsClosure rootsCl(use_prev_marking); |
989
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
890
diff
changeset
|
2393 CodeBlobToOopClosure blobsCl(&rootsCl, /*do_marking=*/ false); |
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
890
diff
changeset
|
2394 process_strong_roots(true, // activate StrongRootsScope |
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
890
diff
changeset
|
2395 false, |
342 | 2396 SharedHeap::SO_AllClasses, |
2397 &rootsCl, | |
989
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
890
diff
changeset
|
2398 &blobsCl, |
342 | 2399 &rootsCl); |
1020
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
2400 bool failures = rootsCl.failures(); |
342 | 2401 rem_set()->invalidate(perm_gen()->used_region(), false); |
2402 if (!silent) { gclog_or_tty->print("heapRegions "); } | |
390 | 2403 if (GCParallelVerificationEnabled && ParallelGCThreads > 1) { |
2404 assert(check_heap_region_claim_values(HeapRegion::InitialClaimValue), | |
2405 "sanity check"); | |
2406 | |
811 | 2407 G1ParVerifyTask task(this, allow_dirty, use_prev_marking); |
390 | 2408 int n_workers = workers()->total_workers(); |
2409 set_par_threads(n_workers); | |
2410 workers()->run_task(&task); | |
2411 set_par_threads(0); | |
1020
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
2412 if (task.failures()) { |
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
2413 failures = true; |
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
2414 } |
390 | 2415 |
2416 assert(check_heap_region_claim_values(HeapRegion::ParVerifyClaimValue), | |
2417 "sanity check"); | |
2418 | |
2419 reset_heap_region_claim_values(); | |
2420 | |
2421 assert(check_heap_region_claim_values(HeapRegion::InitialClaimValue), | |
2422 "sanity check"); | |
2423 } else { | |
811 | 2424 VerifyRegionClosure blk(allow_dirty, false, use_prev_marking); |
390 | 2425 _hrs->iterate(&blk); |
1020
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
2426 if (blk.failures()) { |
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
2427 failures = true; |
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
2428 } |
390 | 2429 } |
342 | 2430 if (!silent) gclog_or_tty->print("remset "); |
2431 rem_set()->verify(); | |
1020
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
2432 |
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
2433 if (failures) { |
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
2434 gclog_or_tty->print_cr("Heap:"); |
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
2435 print_on(gclog_or_tty, true /* extended */); |
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
2436 gclog_or_tty->print_cr(""); |
1547
fb1a39993f69
6951319: enable solaris builds using Sun Studio 12 update 1
jcoomes
parents:
1545
diff
changeset
|
2437 #ifndef PRODUCT |
1044 | 2438 if (VerifyDuringGC && G1VerifyDuringGCPrintReachable) { |
1388 | 2439 concurrent_mark()->print_reachable("at-verification-failure", |
2440 use_prev_marking, false /* all */); | |
1020
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
2441 } |
1547
fb1a39993f69
6951319: enable solaris builds using Sun Studio 12 update 1
jcoomes
parents:
1545
diff
changeset
|
2442 #endif |
1020
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
2443 gclog_or_tty->flush(); |
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
2444 } |
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
2445 guarantee(!failures, "there should not have been any failures"); |
342 | 2446 } else { |
2447 if (!silent) gclog_or_tty->print("(SKIPPING roots, heapRegions, remset) "); | |
2448 } | |
2449 } | |
2450 | |
2451 class PrintRegionClosure: public HeapRegionClosure { | |
2452 outputStream* _st; | |
2453 public: | |
2454 PrintRegionClosure(outputStream* st) : _st(st) {} | |
2455 bool doHeapRegion(HeapRegion* r) { | |
2456 r->print_on(_st); | |
2457 return false; | |
2458 } | |
2459 }; | |
2460 | |
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
2461 void G1CollectedHeap::print() const { print_on(tty); } |
342 | 2462 |
2463 void G1CollectedHeap::print_on(outputStream* st) const { | |
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
2464 print_on(st, PrintHeapAtGCExtended); |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
2465 } |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
2466 |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
2467 void G1CollectedHeap::print_on(outputStream* st, bool extended) const { |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
2468 st->print(" %-20s", "garbage-first heap"); |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
2469 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
|
2470 capacity()/K, used_unlocked()/K); |
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
2471 st->print(" [" INTPTR_FORMAT ", " INTPTR_FORMAT ", " INTPTR_FORMAT ")", |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
2472 _g1_storage.low_boundary(), |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
2473 _g1_storage.high(), |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
2474 _g1_storage.high_boundary()); |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
2475 st->cr(); |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
2476 st->print(" region size " SIZE_FORMAT "K, ", |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
2477 HeapRegion::GrainBytes/K); |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
2478 size_t young_regions = _young_list->length(); |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
2479 st->print(SIZE_FORMAT " young (" SIZE_FORMAT "K), ", |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
2480 young_regions, young_regions * HeapRegion::GrainBytes / K); |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
2481 size_t survivor_regions = g1_policy()->recorded_survivor_regions(); |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
2482 st->print(SIZE_FORMAT " survivors (" SIZE_FORMAT "K)", |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
2483 survivor_regions, survivor_regions * HeapRegion::GrainBytes / K); |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
2484 st->cr(); |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
2485 perm()->as_gen()->print_on(st); |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
2486 if (extended) { |
1020
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
2487 st->cr(); |
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
2488 print_on_extended(st); |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
2489 } |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
2490 } |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
2491 |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
2492 void G1CollectedHeap::print_on_extended(outputStream* st) const { |
342 | 2493 PrintRegionClosure blk(st); |
2494 _hrs->iterate(&blk); | |
2495 } | |
2496 | |
2497 void G1CollectedHeap::print_gc_threads_on(outputStream* st) const { | |
2498 if (ParallelGCThreads > 0) { | |
1019 | 2499 workers()->print_worker_threads_on(st); |
2500 } | |
2501 | |
2502 _cmThread->print_on(st); | |
342 | 2503 st->cr(); |
1019 | 2504 |
2505 _cm->print_worker_threads_on(st); | |
2506 | |
2507 _cg1r->print_worker_threads_on(st); | |
2508 | |
342 | 2509 _czft->print_on(st); |
2510 st->cr(); | |
2511 } | |
2512 | |
2513 void G1CollectedHeap::gc_threads_do(ThreadClosure* tc) const { | |
2514 if (ParallelGCThreads > 0) { | |
2515 workers()->threads_do(tc); | |
2516 } | |
2517 tc->do_thread(_cmThread); | |
794 | 2518 _cg1r->threads_do(tc); |
342 | 2519 tc->do_thread(_czft); |
2520 } | |
2521 | |
2522 void G1CollectedHeap::print_tracing_info() const { | |
2523 // We'll overload this to mean "trace GC pause statistics." | |
2524 if (TraceGen0Time || TraceGen1Time) { | |
2525 // The "G1CollectorPolicy" is keeping track of these stats, so delegate | |
2526 // to that. | |
2527 g1_policy()->print_tracing_info(); | |
2528 } | |
751 | 2529 if (G1SummarizeRSetStats) { |
342 | 2530 g1_rem_set()->print_summary_info(); |
2531 } | |
1282 | 2532 if (G1SummarizeConcMark) { |
342 | 2533 concurrent_mark()->print_summary_info(); |
2534 } | |
751 | 2535 if (G1SummarizeZFStats) { |
342 | 2536 ConcurrentZFThread::print_summary_info(); |
2537 } | |
2538 g1_policy()->print_yg_surv_rate_info(); | |
2539 | |
2540 SpecializationStats::print(); | |
2541 } | |
2542 | |
2543 | |
2544 int G1CollectedHeap::addr_to_arena_id(void* addr) const { | |
2545 HeapRegion* hr = heap_region_containing(addr); | |
2546 if (hr == NULL) { | |
2547 return 0; | |
2548 } else { | |
2549 return 1; | |
2550 } | |
2551 } | |
2552 | |
2553 G1CollectedHeap* G1CollectedHeap::heap() { | |
2554 assert(_sh->kind() == CollectedHeap::G1CollectedHeap, | |
2555 "not a garbage-first heap"); | |
2556 return _g1h; | |
2557 } | |
2558 | |
2559 void G1CollectedHeap::gc_prologue(bool full /* Ignored */) { | |
1245
6484c4ee11cb
6904516: More object array barrier fixes, following up on 6906727
ysr
parents:
1166
diff
changeset
|
2560 // always_do_update_barrier = false; |
342 | 2561 assert(InlineCacheBuffer::is_empty(), "should have cleaned up ICBuffer"); |
2562 // Call allocation profiler | |
2563 AllocationProfiler::iterate_since_last_gc(); | |
2564 // Fill TLAB's and such | |
2565 ensure_parsability(true); | |
2566 } | |
2567 | |
2568 void G1CollectedHeap::gc_epilogue(bool full /* Ignored */) { | |
2569 // FIXME: what is this about? | |
2570 // I'm ignoring the "fill_newgen()" call if "alloc_event_enabled" | |
2571 // is set. | |
2572 COMPILER2_PRESENT(assert(DerivedPointerTable::is_empty(), | |
2573 "derived pointer present")); | |
1245
6484c4ee11cb
6904516: More object array barrier fixes, following up on 6906727
ysr
parents:
1166
diff
changeset
|
2574 // always_do_update_barrier = true; |
342 | 2575 } |
2576 | |
2577 void G1CollectedHeap::do_collection_pause() { | |
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2578 assert(Heap_lock->owned_by_self(), "we assume we'reholding the Heap_lock"); |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2579 |
342 | 2580 // Read the GC count while holding the Heap_lock |
2581 // we need to do this _before_ wait_for_cleanup_complete(), to | |
2582 // ensure that we do not give up the heap lock and potentially | |
2583 // pick up the wrong count | |
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2584 unsigned int gc_count_before = SharedHeap::heap()->total_collections(); |
342 | 2585 |
2586 // Don't want to do a GC pause while cleanup is being completed! | |
2587 wait_for_cleanup_complete(); | |
2588 | |
2589 g1_policy()->record_stop_world_start(); | |
2590 { | |
2591 MutexUnlocker mu(Heap_lock); // give up heap lock, execute gets it back | |
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2592 VM_G1IncCollectionPause op(gc_count_before, |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2593 false, /* should_initiate_conc_mark */ |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2594 g1_policy()->max_pause_time_ms(), |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2595 GCCause::_g1_inc_collection_pause); |
342 | 2596 VMThread::execute(&op); |
2597 } | |
2598 } | |
2599 | |
2600 void | |
2601 G1CollectedHeap::doConcurrentMark() { | |
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
2602 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
|
2603 if (!_cmThread->in_progress()) { |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
2604 _cmThread->set_started(); |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
2605 CGC_lock->notify(); |
342 | 2606 } |
2607 } | |
2608 | |
2609 class VerifyMarkedObjsClosure: public ObjectClosure { | |
2610 G1CollectedHeap* _g1h; | |
2611 public: | |
2612 VerifyMarkedObjsClosure(G1CollectedHeap* g1h) : _g1h(g1h) {} | |
2613 void do_object(oop obj) { | |
2614 assert(obj->mark()->is_marked() ? !_g1h->is_obj_dead(obj) : true, | |
2615 "markandsweep mark should agree with concurrent deadness"); | |
2616 } | |
2617 }; | |
2618 | |
2619 void | |
2620 G1CollectedHeap::checkConcurrentMark() { | |
2621 VerifyMarkedObjsClosure verifycl(this); | |
2622 // MutexLockerEx x(getMarkBitMapLock(), | |
2623 // Mutex::_no_safepoint_check_flag); | |
678 | 2624 object_iterate(&verifycl, false); |
342 | 2625 } |
2626 | |
2627 void G1CollectedHeap::do_sync_mark() { | |
2628 _cm->checkpointRootsInitial(); | |
2629 _cm->markFromRoots(); | |
2630 _cm->checkpointRootsFinal(false); | |
2631 } | |
2632 | |
2633 // <NEW PREDICTION> | |
2634 | |
2635 double G1CollectedHeap::predict_region_elapsed_time_ms(HeapRegion *hr, | |
2636 bool young) { | |
2637 return _g1_policy->predict_region_elapsed_time_ms(hr, young); | |
2638 } | |
2639 | |
2640 void G1CollectedHeap::check_if_region_is_too_expensive(double | |
2641 predicted_time_ms) { | |
2642 _g1_policy->check_if_region_is_too_expensive(predicted_time_ms); | |
2643 } | |
2644 | |
2645 size_t G1CollectedHeap::pending_card_num() { | |
2646 size_t extra_cards = 0; | |
2647 JavaThread *curr = Threads::first(); | |
2648 while (curr != NULL) { | |
2649 DirtyCardQueue& dcq = curr->dirty_card_queue(); | |
2650 extra_cards += dcq.size(); | |
2651 curr = curr->next(); | |
2652 } | |
2653 DirtyCardQueueSet& dcqs = JavaThread::dirty_card_queue_set(); | |
2654 size_t buffer_size = dcqs.buffer_size(); | |
2655 size_t buffer_num = dcqs.completed_buffers_num(); | |
2656 return buffer_size * buffer_num + extra_cards; | |
2657 } | |
2658 | |
2659 size_t G1CollectedHeap::max_pending_card_num() { | |
2660 DirtyCardQueueSet& dcqs = JavaThread::dirty_card_queue_set(); | |
2661 size_t buffer_size = dcqs.buffer_size(); | |
2662 size_t buffer_num = dcqs.completed_buffers_num(); | |
2663 int thread_num = Threads::number_of_threads(); | |
2664 return (buffer_num + thread_num) * buffer_size; | |
2665 } | |
2666 | |
2667 size_t G1CollectedHeap::cards_scanned() { | |
2668 HRInto_G1RemSet* g1_rset = (HRInto_G1RemSet*) g1_rem_set(); | |
2669 return g1_rset->cardsScanned(); | |
2670 } | |
2671 | |
2672 void | |
2673 G1CollectedHeap::setup_surviving_young_words() { | |
2674 guarantee( _surviving_young_words == NULL, "pre-condition" ); | |
2675 size_t array_length = g1_policy()->young_cset_length(); | |
2676 _surviving_young_words = NEW_C_HEAP_ARRAY(size_t, array_length); | |
2677 if (_surviving_young_words == NULL) { | |
2678 vm_exit_out_of_memory(sizeof(size_t) * array_length, | |
2679 "Not enough space for young surv words summary."); | |
2680 } | |
2681 memset(_surviving_young_words, 0, array_length * sizeof(size_t)); | |
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
2682 #ifdef ASSERT |
342 | 2683 for (size_t i = 0; i < array_length; ++i) { |
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
2684 assert( _surviving_young_words[i] == 0, "memset above" ); |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
2685 } |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
2686 #endif // !ASSERT |
342 | 2687 } |
2688 | |
2689 void | |
2690 G1CollectedHeap::update_surviving_young_words(size_t* surv_young_words) { | |
2691 MutexLockerEx x(ParGCRareEvent_lock, Mutex::_no_safepoint_check_flag); | |
2692 size_t array_length = g1_policy()->young_cset_length(); | |
2693 for (size_t i = 0; i < array_length; ++i) | |
2694 _surviving_young_words[i] += surv_young_words[i]; | |
2695 } | |
2696 | |
2697 void | |
2698 G1CollectedHeap::cleanup_surviving_young_words() { | |
2699 guarantee( _surviving_young_words != NULL, "pre-condition" ); | |
2700 FREE_C_HEAP_ARRAY(size_t, _surviving_young_words); | |
2701 _surviving_young_words = NULL; | |
2702 } | |
2703 | |
2704 // </NEW PREDICTION> | |
2705 | |
1261
0414c1049f15
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
1245
diff
changeset
|
2706 struct PrepareForRSScanningClosure : public HeapRegionClosure { |
0414c1049f15
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
1245
diff
changeset
|
2707 bool doHeapRegion(HeapRegion *r) { |
0414c1049f15
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
1245
diff
changeset
|
2708 r->rem_set()->set_iter_claimed(0); |
0414c1049f15
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
1245
diff
changeset
|
2709 return false; |
0414c1049f15
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
1245
diff
changeset
|
2710 } |
0414c1049f15
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
1245
diff
changeset
|
2711 }; |
0414c1049f15
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
1245
diff
changeset
|
2712 |
342 | 2713 void |
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2714 G1CollectedHeap::do_collection_pause_at_safepoint(double target_pause_time_ms) { |
1359
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1313
diff
changeset
|
2715 if (GC_locker::check_active_before_gc()) { |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1313
diff
changeset
|
2716 return; // GC is disabled (e.g. JNI GetXXXCritical operation) |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1313
diff
changeset
|
2717 } |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1313
diff
changeset
|
2718 |
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
2719 if (PrintHeapAtGC) { |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
2720 Universe::print_heap_before_gc(); |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
2721 } |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
2722 |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
2723 { |
1089
db0d5eba9d20
6815790: G1: Missing MemoryPoolMXBeans with -XX:+UseG1GC
tonyp
parents:
1088
diff
changeset
|
2724 ResourceMark rm; |
db0d5eba9d20
6815790: G1: Missing MemoryPoolMXBeans with -XX:+UseG1GC
tonyp
parents:
1088
diff
changeset
|
2725 |
1359
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1313
diff
changeset
|
2726 // This call will decide whether this pause is an initial-mark |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1313
diff
changeset
|
2727 // pause. If it is, during_initial_mark_pause() will return true |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1313
diff
changeset
|
2728 // for the duration of this pause. |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1313
diff
changeset
|
2729 g1_policy()->decide_on_conc_mark_initiation(); |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1313
diff
changeset
|
2730 |
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
2731 char verbose_str[128]; |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
2732 sprintf(verbose_str, "GC pause "); |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
2733 if (g1_policy()->in_young_gc_mode()) { |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
2734 if (g1_policy()->full_young_gcs()) |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
2735 strcat(verbose_str, "(young)"); |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
2736 else |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
2737 strcat(verbose_str, "(partial)"); |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
2738 } |
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2739 if (g1_policy()->during_initial_mark_pause()) { |
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
2740 strcat(verbose_str, " (initial-mark)"); |
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2741 // 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
|
2742 // full collection counter. |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2743 increment_total_full_collections(); |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2744 } |
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
2745 |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
2746 // if PrintGCDetails is on, we'll print long statistics information |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
2747 // in the collector policy code, so let's not print this as the output |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
2748 // is messy if we do. |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
2749 gclog_or_tty->date_stamp(PrintGC && PrintGCDateStamps); |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
2750 TraceCPUTime tcpu(PrintGCDetails, true, gclog_or_tty); |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
2751 TraceTime t(verbose_str, PrintGC && !PrintGCDetails, true, gclog_or_tty); |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
2752 |
1089
db0d5eba9d20
6815790: G1: Missing MemoryPoolMXBeans with -XX:+UseG1GC
tonyp
parents:
1088
diff
changeset
|
2753 TraceMemoryManagerStats tms(false /* fullGC */); |
db0d5eba9d20
6815790: G1: Missing MemoryPoolMXBeans with -XX:+UseG1GC
tonyp
parents:
1088
diff
changeset
|
2754 |
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
2755 assert(SafepointSynchronize::is_at_safepoint(), "should be at safepoint"); |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
2756 assert(Thread::current() == VMThread::vm_thread(), "should be in vm thread"); |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
2757 guarantee(!is_gc_active(), "collection is not reentrant"); |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
2758 assert(regions_accounted_for(), "Region leakage!"); |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
2759 |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
2760 increment_gc_time_stamp(); |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
2761 |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
2762 if (g1_policy()->in_young_gc_mode()) { |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
2763 assert(check_young_list_well_formed(), |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
2764 "young list should be well formed"); |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
2765 } |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
2766 |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
2767 { // 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
|
2768 IsGCActiveMark x; |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
2769 |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
2770 gc_prologue(false); |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
2771 increment_total_collections(false /* full gc */); |
342 | 2772 |
2773 #if G1_REM_SET_LOGGING | |
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
2774 gclog_or_tty->print_cr("\nJust chose CS, heap:"); |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
2775 print(); |
342 | 2776 #endif |
2777 | |
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
2778 if (VerifyBeforeGC && total_collections() >= VerifyGCStartAt) { |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
2779 HandleMark hm; // Discard invalid handles created during verification |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
2780 prepare_for_verify(); |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
2781 gclog_or_tty->print(" VerifyBeforeGC:"); |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
2782 Universe::verify(false); |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
2783 } |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
2784 |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
2785 COMPILER2_PRESENT(DerivedPointerTable::clear()); |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
2786 |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
2787 // We want to turn off ref discovery, if necessary, and turn it back on |
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
2788 // on again later if we do. XXX Dubious: why is discovery disabled? |
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
2789 bool was_enabled = ref_processor()->discovery_enabled(); |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
2790 if (was_enabled) ref_processor()->disable_discovery(); |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
2791 |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
2792 // Forget the current alloc region (we might even choose it to be part |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
2793 // of the collection set!). |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
2794 abandon_cur_alloc_region(); |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
2795 |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
2796 // The elapsed time induced by the start time below deliberately elides |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
2797 // the possible verification above. |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
2798 double start_time_sec = os::elapsedTime(); |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
2799 size_t start_used_bytes = used(); |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
2800 |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2801 #if YOUNG_LIST_VERBOSE |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2802 gclog_or_tty->print_cr("\nBefore recording pause start.\nYoung_list:"); |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2803 _young_list->print(); |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2804 g1_policy()->print_collection_set(g1_policy()->inc_cset_head(), gclog_or_tty); |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2805 #endif // YOUNG_LIST_VERBOSE |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2806 |
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
2807 g1_policy()->record_collection_pause_start(start_time_sec, |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
2808 start_used_bytes); |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
2809 |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2810 #if YOUNG_LIST_VERBOSE |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2811 gclog_or_tty->print_cr("\nAfter recording pause start.\nYoung_list:"); |
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
2812 _young_list->print(); |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2813 #endif // YOUNG_LIST_VERBOSE |
342 | 2814 |
1359
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1313
diff
changeset
|
2815 if (g1_policy()->during_initial_mark_pause()) { |
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
2816 concurrent_mark()->checkpointRootsInitialPre(); |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
2817 } |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
2818 save_marks(); |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
2819 |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
2820 // We must do this before any possible evacuation that should propagate |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
2821 // marks. |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
2822 if (mark_in_progress()) { |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
2823 double start_time_sec = os::elapsedTime(); |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
2824 |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
2825 _cm->drainAllSATBBuffers(); |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
2826 double finish_mark_ms = (os::elapsedTime() - start_time_sec) * 1000.0; |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
2827 g1_policy()->record_satb_drain_time(finish_mark_ms); |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
2828 } |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
2829 // Record the number of elements currently on the mark stack, so we |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
2830 // only iterate over these. (Since evacuation may add to the mark |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
2831 // stack, doing more exposes race conditions.) If no mark is in |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
2832 // progress, this will be zero. |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
2833 _cm->set_oops_do_bound(); |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
2834 |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
2835 assert(regions_accounted_for(), "Region leakage."); |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
2836 |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
2837 if (mark_in_progress()) |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
2838 concurrent_mark()->newCSet(); |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
2839 |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2840 #if YOUNG_LIST_VERBOSE |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2841 gclog_or_tty->print_cr("\nBefore choosing collection set.\nYoung_list:"); |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2842 _young_list->print(); |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2843 g1_policy()->print_collection_set(g1_policy()->inc_cset_head(), gclog_or_tty); |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2844 #endif // YOUNG_LIST_VERBOSE |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2845 |
1707 | 2846 g1_policy()->choose_collection_set(target_pause_time_ms); |
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
2847 |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
2848 // Nothing to do if we were unable to choose a collection set. |
342 | 2849 #if G1_REM_SET_LOGGING |
1707 | 2850 gclog_or_tty->print_cr("\nAfter pause, heap:"); |
2851 print(); | |
342 | 2852 #endif |
1707 | 2853 PrepareForRSScanningClosure prepare_for_rs_scan; |
2854 collection_set_iterate(&prepare_for_rs_scan); | |
2855 | |
2856 setup_surviving_young_words(); | |
2857 | |
2858 // Set up the gc allocation regions. | |
2859 get_gc_alloc_regions(); | |
2860 | |
2861 // Actually do the work... | |
2862 evacuate_collection_set(); | |
2863 | |
2864 free_collection_set(g1_policy()->collection_set()); | |
2865 g1_policy()->clear_collection_set(); | |
2866 | |
2867 cleanup_surviving_young_words(); | |
2868 | |
2869 // Start a new incremental collection set for the next pause. | |
2870 g1_policy()->start_incremental_cset_building(); | |
2871 | |
2872 // Clear the _cset_fast_test bitmap in anticipation of adding | |
2873 // regions to the incremental collection set for the next | |
2874 // evacuation pause. | |
2875 clear_cset_fast_test(); | |
2876 | |
2877 if (g1_policy()->in_young_gc_mode()) { | |
2878 _young_list->reset_sampled_info(); | |
2879 | |
2880 // Don't check the whole heap at this point as the | |
2881 // GC alloc regions from this pause have been tagged | |
2882 // as survivors and moved on to the survivor list. | |
2883 // Survivor regions will fail the !is_young() check. | |
2884 assert(check_young_list_empty(false /* check_heap */), | |
2885 "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
|
2886 |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2887 #if YOUNG_LIST_VERBOSE |
1707 | 2888 gclog_or_tty->print_cr("Before recording survivors.\nYoung List:"); |
2889 _young_list->print(); | |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2890 #endif // YOUNG_LIST_VERBOSE |
342 | 2891 |
1707 | 2892 g1_policy()->record_survivor_regions(_young_list->survivor_length(), |
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
2893 _young_list->first_survivor_region(), |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
2894 _young_list->last_survivor_region()); |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2895 |
1707 | 2896 _young_list->reset_auxilary_lists(); |
342 | 2897 } |
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
2898 |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
2899 if (evacuation_failed()) { |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
2900 _summary_bytes_used = recalculate_used(); |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
2901 } else { |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
2902 // The "used" of the the collection set have already been subtracted |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
2903 // when they were freed. Add in the bytes evacuated. |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
2904 _summary_bytes_used += g1_policy()->bytes_in_to_space(); |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
2905 } |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
2906 |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
2907 if (g1_policy()->in_young_gc_mode() && |
1359
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1313
diff
changeset
|
2908 g1_policy()->during_initial_mark_pause()) { |
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
2909 concurrent_mark()->checkpointRootsInitialPost(); |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
2910 set_marking_started(); |
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
2911 // CAUTION: after the doConcurrentMark() call below, |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
2912 // the concurrent marking thread(s) could be running |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
2913 // concurrently with us. Make sure that anything after |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
2914 // this point does not assume that we are the only GC thread |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
2915 // running. Note: of course, the actual marking work will |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
2916 // not start until the safepoint itself is released in |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
2917 // ConcurrentGCThread::safepoint_desynchronize(). |
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
2918 doConcurrentMark(); |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
2919 } |
342 | 2920 |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2921 #if YOUNG_LIST_VERBOSE |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2922 gclog_or_tty->print_cr("\nEnd of the pause.\nYoung_list:"); |
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
2923 _young_list->print(); |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2924 g1_policy()->print_collection_set(g1_policy()->inc_cset_head(), gclog_or_tty); |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2925 #endif // YOUNG_LIST_VERBOSE |
342 | 2926 |
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
2927 double end_time_sec = os::elapsedTime(); |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
2928 double pause_time_ms = (end_time_sec - start_time_sec) * MILLIUNITS; |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
2929 g1_policy()->record_pause_time_ms(pause_time_ms); |
1707 | 2930 g1_policy()->record_collection_pause_end(); |
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
2931 |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
2932 assert(regions_accounted_for(), "Region leakage."); |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
2933 |
1089
db0d5eba9d20
6815790: G1: Missing MemoryPoolMXBeans with -XX:+UseG1GC
tonyp
parents:
1088
diff
changeset
|
2934 MemoryService::track_memory_usage(); |
db0d5eba9d20
6815790: G1: Missing MemoryPoolMXBeans with -XX:+UseG1GC
tonyp
parents:
1088
diff
changeset
|
2935 |
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
2936 if (VerifyAfterGC && total_collections() >= VerifyGCStartAt) { |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
2937 HandleMark hm; // Discard invalid handles created during verification |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
2938 gclog_or_tty->print(" VerifyAfterGC:"); |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
2939 prepare_for_verify(); |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
2940 Universe::verify(false); |
342 | 2941 } |
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
2942 |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
2943 if (was_enabled) ref_processor()->enable_discovery(); |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
2944 |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
2945 { |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
2946 size_t expand_bytes = g1_policy()->expansion_amount(); |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
2947 if (expand_bytes > 0) { |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
2948 size_t bytes_before = capacity(); |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
2949 expand(expand_bytes); |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
2950 } |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
2951 } |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
2952 |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
2953 if (mark_in_progress()) { |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
2954 concurrent_mark()->update_g1_committed(); |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
2955 } |
546
05c6d52fa7a9
6690928: Use spinning in combination with yields for workstealing termination.
jmasa
parents:
545
diff
changeset
|
2956 |
05c6d52fa7a9
6690928: Use spinning in combination with yields for workstealing termination.
jmasa
parents:
545
diff
changeset
|
2957 #ifdef TRACESPINNING |
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
2958 ParallelTaskTerminator::print_termination_counts(); |
546
05c6d52fa7a9
6690928: Use spinning in combination with yields for workstealing termination.
jmasa
parents:
545
diff
changeset
|
2959 #endif |
342 | 2960 |
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
2961 gc_epilogue(false); |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
2962 } |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
2963 |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
2964 assert(verify_region_lists(), "Bad region lists."); |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
2965 |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
2966 if (ExitAfterGCNum > 0 && total_collections() == ExitAfterGCNum) { |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
2967 gclog_or_tty->print_cr("Stopping after GC #%d", ExitAfterGCNum); |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
2968 print_tracing_info(); |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
2969 vm_exit(-1); |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
2970 } |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
2971 } |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
2972 |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
2973 if (PrintHeapAtGC) { |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
2974 Universe::print_heap_after_gc(); |
342 | 2975 } |
884
83b687ce3090
6866591: G1: print update buffer processing stats more often
tonyp
parents:
883
diff
changeset
|
2976 if (G1SummarizeRSetStats && |
83b687ce3090
6866591: G1: print update buffer processing stats more often
tonyp
parents:
883
diff
changeset
|
2977 (G1SummarizeRSetStatsPeriod > 0) && |
83b687ce3090
6866591: G1: print update buffer processing stats more often
tonyp
parents:
883
diff
changeset
|
2978 (total_collections() % G1SummarizeRSetStatsPeriod == 0)) { |
83b687ce3090
6866591: G1: print update buffer processing stats more often
tonyp
parents:
883
diff
changeset
|
2979 g1_rem_set()->print_summary_info(); |
83b687ce3090
6866591: G1: print update buffer processing stats more often
tonyp
parents:
883
diff
changeset
|
2980 } |
342 | 2981 } |
2982 | |
1391
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
2983 size_t G1CollectedHeap::desired_plab_sz(GCAllocPurpose purpose) |
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
2984 { |
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
2985 size_t gclab_word_size; |
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
2986 switch (purpose) { |
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
2987 case GCAllocForSurvived: |
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
2988 gclab_word_size = YoungPLABSize; |
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
2989 break; |
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
2990 case GCAllocForTenured: |
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
2991 gclab_word_size = OldPLABSize; |
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
2992 break; |
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
2993 default: |
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
2994 assert(false, "unknown GCAllocPurpose"); |
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
2995 gclab_word_size = OldPLABSize; |
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
2996 break; |
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
2997 } |
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
2998 return gclab_word_size; |
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
2999 } |
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
3000 |
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
3001 |
342 | 3002 void G1CollectedHeap::set_gc_alloc_region(int purpose, HeapRegion* r) { |
3003 assert(purpose >= 0 && purpose < GCAllocPurposeCount, "invalid purpose"); | |
636 | 3004 // make sure we don't call set_gc_alloc_region() multiple times on |
3005 // the same region | |
3006 assert(r == NULL || !r->is_gc_alloc_region(), | |
3007 "shouldn't already be a GC alloc region"); | |
1360
bda703475ded
6940894: G1: assert(new_obj != 0 || ... "should be forwarded") for compaction tests
johnc
parents:
1359
diff
changeset
|
3008 assert(r == NULL || !r->isHumongous(), |
bda703475ded
6940894: G1: assert(new_obj != 0 || ... "should be forwarded") for compaction tests
johnc
parents:
1359
diff
changeset
|
3009 "humongous regions shouldn't be used as GC alloc regions"); |
bda703475ded
6940894: G1: assert(new_obj != 0 || ... "should be forwarded") for compaction tests
johnc
parents:
1359
diff
changeset
|
3010 |
342 | 3011 HeapWord* original_top = NULL; |
3012 if (r != NULL) | |
3013 original_top = r->top(); | |
3014 | |
3015 // We will want to record the used space in r as being there before gc. | |
3016 // One we install it as a GC alloc region it's eligible for allocation. | |
3017 // So record it now and use it later. | |
3018 size_t r_used = 0; | |
3019 if (r != NULL) { | |
3020 r_used = r->used(); | |
3021 | |
3022 if (ParallelGCThreads > 0) { | |
3023 // need to take the lock to guard against two threads calling | |
3024 // get_gc_alloc_region concurrently (very unlikely but...) | |
3025 MutexLockerEx x(ParGCRareEvent_lock, Mutex::_no_safepoint_check_flag); | |
3026 r->save_marks(); | |
3027 } | |
3028 } | |
3029 HeapRegion* old_alloc_region = _gc_alloc_regions[purpose]; | |
3030 _gc_alloc_regions[purpose] = r; | |
3031 if (old_alloc_region != NULL) { | |
3032 // Replace aliases too. | |
3033 for (int ap = 0; ap < GCAllocPurposeCount; ++ap) { | |
3034 if (_gc_alloc_regions[ap] == old_alloc_region) { | |
3035 _gc_alloc_regions[ap] = r; | |
3036 } | |
3037 } | |
3038 } | |
3039 if (r != NULL) { | |
3040 push_gc_alloc_region(r); | |
3041 if (mark_in_progress() && original_top != r->next_top_at_mark_start()) { | |
3042 // We are using a region as a GC alloc region after it has been used | |
3043 // as a mutator allocation region during the current marking cycle. | |
3044 // The mutator-allocated objects are currently implicitly marked, but | |
3045 // when we move hr->next_top_at_mark_start() forward at the the end | |
3046 // of the GC pause, they won't be. We therefore mark all objects in | |
3047 // the "gap". We do this object-by-object, since marking densely | |
3048 // does not currently work right with marking bitmap iteration. This | |
3049 // means we rely on TLAB filling at the start of pauses, and no | |
3050 // "resuscitation" of filled TLAB's. If we want to do this, we need | |
3051 // to fix the marking bitmap iteration. | |
3052 HeapWord* curhw = r->next_top_at_mark_start(); | |
3053 HeapWord* t = original_top; | |
3054 | |
3055 while (curhw < t) { | |
3056 oop cur = (oop)curhw; | |
3057 // We'll assume parallel for generality. This is rare code. | |
3058 concurrent_mark()->markAndGrayObjectIfNecessary(cur); // can't we just mark them? | |
3059 curhw = curhw + cur->size(); | |
3060 } | |
3061 assert(curhw == t, "Should have parsed correctly."); | |
3062 } | |
3063 if (G1PolicyVerbose > 1) { | |
3064 gclog_or_tty->print("New alloc region ["PTR_FORMAT", "PTR_FORMAT", " PTR_FORMAT") " | |
3065 "for survivors:", r->bottom(), original_top, r->end()); | |
3066 r->print(); | |
3067 } | |
3068 g1_policy()->record_before_bytes(r_used); | |
3069 } | |
3070 } | |
3071 | |
3072 void G1CollectedHeap::push_gc_alloc_region(HeapRegion* hr) { | |
3073 assert(Thread::current()->is_VM_thread() || | |
3074 par_alloc_during_gc_lock()->owned_by_self(), "Precondition"); | |
3075 assert(!hr->is_gc_alloc_region() && !hr->in_collection_set(), | |
3076 "Precondition."); | |
3077 hr->set_is_gc_alloc_region(true); | |
3078 hr->set_next_gc_alloc_region(_gc_alloc_region_list); | |
3079 _gc_alloc_region_list = hr; | |
3080 } | |
3081 | |
3082 #ifdef G1_DEBUG | |
3083 class FindGCAllocRegion: public HeapRegionClosure { | |
3084 public: | |
3085 bool doHeapRegion(HeapRegion* r) { | |
3086 if (r->is_gc_alloc_region()) { | |
3087 gclog_or_tty->print_cr("Region %d ["PTR_FORMAT"...] is still a gc_alloc_region.", | |
3088 r->hrs_index(), r->bottom()); | |
3089 } | |
3090 return false; | |
3091 } | |
3092 }; | |
3093 #endif // G1_DEBUG | |
3094 | |
3095 void G1CollectedHeap::forget_alloc_region_list() { | |
3096 assert(Thread::current()->is_VM_thread(), "Precondition"); | |
3097 while (_gc_alloc_region_list != NULL) { | |
3098 HeapRegion* r = _gc_alloc_region_list; | |
3099 assert(r->is_gc_alloc_region(), "Invariant."); | |
637
25e146966e7c
6817419: G1: Enable extensive verification for humongous regions
iveresov
parents:
636
diff
changeset
|
3100 // We need HeapRegion::oops_on_card_seq_iterate_careful() to work on |
25e146966e7c
6817419: G1: Enable extensive verification for humongous regions
iveresov
parents:
636
diff
changeset
|
3101 // newly allocated data in order to be able to apply deferred updates |
25e146966e7c
6817419: G1: Enable extensive verification for humongous regions
iveresov
parents:
636
diff
changeset
|
3102 // before the GC is done for verification purposes (i.e to allow |
25e146966e7c
6817419: G1: Enable extensive verification for humongous regions
iveresov
parents:
636
diff
changeset
|
3103 // G1HRRSFlushLogBuffersOnVerify). It's safe thing to do after the |
25e146966e7c
6817419: G1: Enable extensive verification for humongous regions
iveresov
parents:
636
diff
changeset
|
3104 // collection. |
25e146966e7c
6817419: G1: Enable extensive verification for humongous regions
iveresov
parents:
636
diff
changeset
|
3105 r->ContiguousSpace::set_saved_mark(); |
342 | 3106 _gc_alloc_region_list = r->next_gc_alloc_region(); |
3107 r->set_next_gc_alloc_region(NULL); | |
3108 r->set_is_gc_alloc_region(false); | |
545 | 3109 if (r->is_survivor()) { |
3110 if (r->is_empty()) { | |
3111 r->set_not_young(); | |
3112 } else { | |
3113 _young_list->add_survivor_region(r); | |
3114 } | |
3115 } | |
342 | 3116 if (r->is_empty()) { |
3117 ++_free_regions; | |
3118 } | |
3119 } | |
3120 #ifdef G1_DEBUG | |
3121 FindGCAllocRegion fa; | |
3122 heap_region_iterate(&fa); | |
3123 #endif // G1_DEBUG | |
3124 } | |
3125 | |
3126 | |
3127 bool G1CollectedHeap::check_gc_alloc_regions() { | |
3128 // TODO: allocation regions check | |
3129 return true; | |
3130 } | |
3131 | |
3132 void G1CollectedHeap::get_gc_alloc_regions() { | |
636 | 3133 // First, let's check that the GC alloc region list is empty (it should) |
3134 assert(_gc_alloc_region_list == NULL, "invariant"); | |
3135 | |
342 | 3136 for (int ap = 0; ap < GCAllocPurposeCount; ++ap) { |
636 | 3137 assert(_gc_alloc_regions[ap] == NULL, "invariant"); |
861
45d97a99715b
6862661: G1: _gc_alloc_region_counts is not updated properly after 6604422
apetrusenko
parents:
846
diff
changeset
|
3138 assert(_gc_alloc_region_counts[ap] == 0, "invariant"); |
636 | 3139 |
342 | 3140 // Create new GC alloc regions. |
636 | 3141 HeapRegion* alloc_region = _retained_gc_alloc_regions[ap]; |
3142 _retained_gc_alloc_regions[ap] = NULL; | |
3143 | |
3144 if (alloc_region != NULL) { | |
3145 assert(_retain_gc_alloc_region[ap], "only way to retain a GC region"); | |
3146 | |
3147 // let's make sure that the GC alloc region is not tagged as such | |
3148 // outside a GC operation | |
3149 assert(!alloc_region->is_gc_alloc_region(), "sanity"); | |
3150 | |
3151 if (alloc_region->in_collection_set() || | |
3152 alloc_region->top() == alloc_region->end() || | |
1360
bda703475ded
6940894: G1: assert(new_obj != 0 || ... "should be forwarded") for compaction tests
johnc
parents:
1359
diff
changeset
|
3153 alloc_region->top() == alloc_region->bottom() || |
bda703475ded
6940894: G1: assert(new_obj != 0 || ... "should be forwarded") for compaction tests
johnc
parents:
1359
diff
changeset
|
3154 alloc_region->isHumongous()) { |
bda703475ded
6940894: G1: assert(new_obj != 0 || ... "should be forwarded") for compaction tests
johnc
parents:
1359
diff
changeset
|
3155 // we will discard the current GC alloc region if |
bda703475ded
6940894: G1: assert(new_obj != 0 || ... "should be forwarded") for compaction tests
johnc
parents:
1359
diff
changeset
|
3156 // * it's in the collection set (it can happen!), |
bda703475ded
6940894: G1: assert(new_obj != 0 || ... "should be forwarded") for compaction tests
johnc
parents:
1359
diff
changeset
|
3157 // * it's already full (no point in using it), |
bda703475ded
6940894: G1: assert(new_obj != 0 || ... "should be forwarded") for compaction tests
johnc
parents:
1359
diff
changeset
|
3158 // * it's empty (this means that it was emptied during |
bda703475ded
6940894: G1: assert(new_obj != 0 || ... "should be forwarded") for compaction tests
johnc
parents:
1359
diff
changeset
|
3159 // a cleanup and it should be on the free list now), or |
bda703475ded
6940894: G1: assert(new_obj != 0 || ... "should be forwarded") for compaction tests
johnc
parents:
1359
diff
changeset
|
3160 // * it's humongous (this means that it was emptied |
bda703475ded
6940894: G1: assert(new_obj != 0 || ... "should be forwarded") for compaction tests
johnc
parents:
1359
diff
changeset
|
3161 // during a cleanup and was added to the free list, but |
bda703475ded
6940894: G1: assert(new_obj != 0 || ... "should be forwarded") for compaction tests
johnc
parents:
1359
diff
changeset
|
3162 // has been subseqently used to allocate a humongous |
bda703475ded
6940894: G1: assert(new_obj != 0 || ... "should be forwarded") for compaction tests
johnc
parents:
1359
diff
changeset
|
3163 // object that may be less than the region size). |
636 | 3164 |
3165 alloc_region = NULL; | |
3166 } | |
3167 } | |
3168 | |
3169 if (alloc_region == NULL) { | |
3170 // we will get a new GC alloc region | |
342 | 3171 alloc_region = newAllocRegionWithExpansion(ap, 0); |
861
45d97a99715b
6862661: G1: _gc_alloc_region_counts is not updated properly after 6604422
apetrusenko
parents:
846
diff
changeset
|
3172 } else { |
45d97a99715b
6862661: G1: _gc_alloc_region_counts is not updated properly after 6604422
apetrusenko
parents:
846
diff
changeset
|
3173 // the region was retained from the last collection |
45d97a99715b
6862661: G1: _gc_alloc_region_counts is not updated properly after 6604422
apetrusenko
parents:
846
diff
changeset
|
3174 ++_gc_alloc_region_counts[ap]; |
1388 | 3175 if (G1PrintHeapRegions) { |
3176 gclog_or_tty->print_cr("new alloc region %d:["PTR_FORMAT", "PTR_FORMAT"], " | |
3177 "top "PTR_FORMAT, | |
3178 alloc_region->hrs_index(), alloc_region->bottom(), alloc_region->end(), alloc_region->top()); | |
3179 } | |
342 | 3180 } |
636 | 3181 |
342 | 3182 if (alloc_region != NULL) { |
636 | 3183 assert(_gc_alloc_regions[ap] == NULL, "pre-condition"); |
342 | 3184 set_gc_alloc_region(ap, alloc_region); |
3185 } | |
636 | 3186 |
3187 assert(_gc_alloc_regions[ap] == NULL || | |
3188 _gc_alloc_regions[ap]->is_gc_alloc_region(), | |
3189 "the GC alloc region should be tagged as such"); | |
3190 assert(_gc_alloc_regions[ap] == NULL || | |
3191 _gc_alloc_regions[ap] == _gc_alloc_region_list, | |
3192 "the GC alloc region should be the same as the GC alloc list head"); | |
342 | 3193 } |
3194 // Set alternative regions for allocation purposes that have reached | |
636 | 3195 // their limit. |
342 | 3196 for (int ap = 0; ap < GCAllocPurposeCount; ++ap) { |
3197 GCAllocPurpose alt_purpose = g1_policy()->alternative_purpose(ap); | |
3198 if (_gc_alloc_regions[ap] == NULL && alt_purpose != ap) { | |
3199 _gc_alloc_regions[ap] = _gc_alloc_regions[alt_purpose]; | |
3200 } | |
3201 } | |
3202 assert(check_gc_alloc_regions(), "alloc regions messed up"); | |
3203 } | |
3204 | |
636 | 3205 void G1CollectedHeap::release_gc_alloc_regions(bool totally) { |
342 | 3206 // We keep a separate list of all regions that have been alloc regions in |
636 | 3207 // the current collection pause. Forget that now. This method will |
3208 // untag the GC alloc regions and tear down the GC alloc region | |
3209 // list. It's desirable that no regions are tagged as GC alloc | |
3210 // outside GCs. | |
342 | 3211 forget_alloc_region_list(); |
3212 | |
3213 // The current alloc regions contain objs that have survived | |
3214 // collection. Make them no longer GC alloc regions. | |
3215 for (int ap = 0; ap < GCAllocPurposeCount; ++ap) { | |
3216 HeapRegion* r = _gc_alloc_regions[ap]; | |
636 | 3217 _retained_gc_alloc_regions[ap] = NULL; |
861
45d97a99715b
6862661: G1: _gc_alloc_region_counts is not updated properly after 6604422
apetrusenko
parents:
846
diff
changeset
|
3218 _gc_alloc_region_counts[ap] = 0; |
636 | 3219 |
3220 if (r != NULL) { | |
3221 // we retain nothing on _gc_alloc_regions between GCs | |
3222 set_gc_alloc_region(ap, NULL); | |
3223 | |
3224 if (r->is_empty()) { | |
3225 // we didn't actually allocate anything in it; let's just put | |
3226 // it on the free list | |
342 | 3227 MutexLockerEx x(ZF_mon, Mutex::_no_safepoint_check_flag); |
3228 r->set_zero_fill_complete(); | |
3229 put_free_region_on_list_locked(r); | |
636 | 3230 } else if (_retain_gc_alloc_region[ap] && !totally) { |
3231 // retain it so that we can use it at the beginning of the next GC | |
3232 _retained_gc_alloc_regions[ap] = r; | |
342 | 3233 } |
3234 } | |
636 | 3235 } |
3236 } | |
3237 | |
3238 #ifndef PRODUCT | |
3239 // Useful for debugging | |
3240 | |
3241 void G1CollectedHeap::print_gc_alloc_regions() { | |
3242 gclog_or_tty->print_cr("GC alloc regions"); | |
3243 for (int ap = 0; ap < GCAllocPurposeCount; ++ap) { | |
3244 HeapRegion* r = _gc_alloc_regions[ap]; | |
3245 if (r == NULL) { | |
3246 gclog_or_tty->print_cr(" %2d : "PTR_FORMAT, ap, NULL); | |
3247 } else { | |
3248 gclog_or_tty->print_cr(" %2d : "PTR_FORMAT" "SIZE_FORMAT, | |
3249 ap, r->bottom(), r->used()); | |
3250 } | |
3251 } | |
3252 } | |
3253 #endif // PRODUCT | |
342 | 3254 |
3255 void G1CollectedHeap::init_for_evac_failure(OopsInHeapRegionClosure* cl) { | |
3256 _drain_in_progress = false; | |
3257 set_evac_failure_closure(cl); | |
3258 _evac_failure_scan_stack = new (ResourceObj::C_HEAP) GrowableArray<oop>(40, true); | |
3259 } | |
3260 | |
3261 void G1CollectedHeap::finalize_for_evac_failure() { | |
3262 assert(_evac_failure_scan_stack != NULL && | |
3263 _evac_failure_scan_stack->length() == 0, | |
3264 "Postcondition"); | |
3265 assert(!_drain_in_progress, "Postcondition"); | |
1045 | 3266 delete _evac_failure_scan_stack; |
342 | 3267 _evac_failure_scan_stack = NULL; |
3268 } | |
3269 | |
3270 | |
3271 | |
3272 // *** Sequential G1 Evacuation | |
3273 | |
3274 HeapWord* G1CollectedHeap::allocate_during_gc(GCAllocPurpose purpose, size_t word_size) { | |
3275 HeapRegion* alloc_region = _gc_alloc_regions[purpose]; | |
3276 // let the caller handle alloc failure | |
3277 if (alloc_region == NULL) return NULL; | |
3278 assert(isHumongous(word_size) || !alloc_region->isHumongous(), | |
3279 "Either the object is humongous or the region isn't"); | |
3280 HeapWord* block = alloc_region->allocate(word_size); | |
3281 if (block == NULL) { | |
3282 block = allocate_during_gc_slow(purpose, alloc_region, false, word_size); | |
3283 } | |
3284 return block; | |
3285 } | |
3286 | |
3287 class G1IsAliveClosure: public BoolObjectClosure { | |
3288 G1CollectedHeap* _g1; | |
3289 public: | |
3290 G1IsAliveClosure(G1CollectedHeap* g1) : _g1(g1) {} | |
3291 void do_object(oop p) { assert(false, "Do not call."); } | |
3292 bool do_object_b(oop p) { | |
3293 // It is reachable if it is outside the collection set, or is inside | |
3294 // and forwarded. | |
3295 | |
3296 #ifdef G1_DEBUG | |
3297 gclog_or_tty->print_cr("is alive "PTR_FORMAT" in CS %d forwarded %d overall %d", | |
3298 (void*) p, _g1->obj_in_cs(p), p->is_forwarded(), | |
3299 !_g1->obj_in_cs(p) || p->is_forwarded()); | |
3300 #endif // G1_DEBUG | |
3301 | |
3302 return !_g1->obj_in_cs(p) || p->is_forwarded(); | |
3303 } | |
3304 }; | |
3305 | |
3306 class G1KeepAliveClosure: public OopClosure { | |
3307 G1CollectedHeap* _g1; | |
3308 public: | |
3309 G1KeepAliveClosure(G1CollectedHeap* g1) : _g1(g1) {} | |
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3310 void do_oop(narrowOop* p) { guarantee(false, "Not needed"); } |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3311 void do_oop( oop* p) { |
342 | 3312 oop obj = *p; |
3313 #ifdef G1_DEBUG | |
3314 if (PrintGC && Verbose) { | |
3315 gclog_or_tty->print_cr("keep alive *"PTR_FORMAT" = "PTR_FORMAT" "PTR_FORMAT, | |
3316 p, (void*) obj, (void*) *p); | |
3317 } | |
3318 #endif // G1_DEBUG | |
3319 | |
3320 if (_g1->obj_in_cs(obj)) { | |
3321 assert( obj->is_forwarded(), "invariant" ); | |
3322 *p = obj->forwardee(); | |
3323 #ifdef G1_DEBUG | |
3324 gclog_or_tty->print_cr(" in CSet: moved "PTR_FORMAT" -> "PTR_FORMAT, | |
3325 (void*) obj, (void*) *p); | |
3326 #endif // G1_DEBUG | |
3327 } | |
3328 } | |
3329 }; | |
3330 | |
616
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
3331 class UpdateRSetDeferred : public OopsInHeapRegionClosure { |
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
3332 private: |
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
3333 G1CollectedHeap* _g1; |
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
3334 DirtyCardQueue *_dcq; |
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
3335 CardTableModRefBS* _ct_bs; |
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
3336 |
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
3337 public: |
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
3338 UpdateRSetDeferred(G1CollectedHeap* g1, DirtyCardQueue* dcq) : |
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
3339 _g1(g1), _ct_bs((CardTableModRefBS*)_g1->barrier_set()), _dcq(dcq) {} |
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
3340 |
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3341 virtual 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
|
3342 virtual 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
|
3343 template <class T> void do_oop_work(T* p) { |
616
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
3344 assert(_from->is_in_reserved(p), "paranoia"); |
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3345 if (!_from->is_in_reserved(oopDesc::load_decode_heap_oop(p)) && |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3346 !_from->is_survivor()) { |
616
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
3347 size_t card_index = _ct_bs->index_for(p); |
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
3348 if (_ct_bs->mark_card_deferred(card_index)) { |
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
3349 _dcq->enqueue((jbyte*)_ct_bs->byte_for_index(card_index)); |
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
3350 } |
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
3351 } |
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
3352 } |
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
3353 }; |
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
3354 |
342 | 3355 class RemoveSelfPointerClosure: public ObjectClosure { |
3356 private: | |
3357 G1CollectedHeap* _g1; | |
3358 ConcurrentMark* _cm; | |
3359 HeapRegion* _hr; | |
3360 size_t _prev_marked_bytes; | |
3361 size_t _next_marked_bytes; | |
616
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
3362 OopsInHeapRegionClosure *_cl; |
342 | 3363 public: |
616
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
3364 RemoveSelfPointerClosure(G1CollectedHeap* g1, OopsInHeapRegionClosure* cl) : |
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
3365 _g1(g1), _cm(_g1->concurrent_mark()), _prev_marked_bytes(0), |
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
3366 _next_marked_bytes(0), _cl(cl) {} |
342 | 3367 |
3368 size_t prev_marked_bytes() { return _prev_marked_bytes; } | |
3369 size_t next_marked_bytes() { return _next_marked_bytes; } | |
3370 | |
352
e0c09f7ec5c4
6702387: G1: assertion failure: assert(p == current_top || oop(p)->is_oop(),"p is not a block start")
iveresov
parents:
342
diff
changeset
|
3371 // The original idea here was to coalesce evacuated and dead objects. |
e0c09f7ec5c4
6702387: G1: assertion failure: assert(p == current_top || oop(p)->is_oop(),"p is not a block start")
iveresov
parents:
342
diff
changeset
|
3372 // However that caused complications with the block offset table (BOT). |
e0c09f7ec5c4
6702387: G1: assertion failure: assert(p == current_top || oop(p)->is_oop(),"p is not a block start")
iveresov
parents:
342
diff
changeset
|
3373 // In particular if there were two TLABs, one of them partially refined. |
e0c09f7ec5c4
6702387: G1: assertion failure: assert(p == current_top || oop(p)->is_oop(),"p is not a block start")
iveresov
parents:
342
diff
changeset
|
3374 // |----- TLAB_1--------|----TLAB_2-~~~(partially refined part)~~~| |
e0c09f7ec5c4
6702387: G1: assertion failure: assert(p == current_top || oop(p)->is_oop(),"p is not a block start")
iveresov
parents:
342
diff
changeset
|
3375 // The BOT entries of the unrefined part of TLAB_2 point to the start |
e0c09f7ec5c4
6702387: G1: assertion failure: assert(p == current_top || oop(p)->is_oop(),"p is not a block start")
iveresov
parents:
342
diff
changeset
|
3376 // of TLAB_2. If the last object of the TLAB_1 and the first object |
e0c09f7ec5c4
6702387: G1: assertion failure: assert(p == current_top || oop(p)->is_oop(),"p is not a block start")
iveresov
parents:
342
diff
changeset
|
3377 // of TLAB_2 are coalesced, then the cards of the unrefined part |
e0c09f7ec5c4
6702387: G1: assertion failure: assert(p == current_top || oop(p)->is_oop(),"p is not a block start")
iveresov
parents:
342
diff
changeset
|
3378 // would point into middle of the filler object. |
e0c09f7ec5c4
6702387: G1: assertion failure: assert(p == current_top || oop(p)->is_oop(),"p is not a block start")
iveresov
parents:
342
diff
changeset
|
3379 // |
e0c09f7ec5c4
6702387: G1: assertion failure: assert(p == current_top || oop(p)->is_oop(),"p is not a block start")
iveresov
parents:
342
diff
changeset
|
3380 // The current approach is to not coalesce and leave the BOT contents intact. |
e0c09f7ec5c4
6702387: G1: assertion failure: assert(p == current_top || oop(p)->is_oop(),"p is not a block start")
iveresov
parents:
342
diff
changeset
|
3381 void do_object(oop obj) { |
e0c09f7ec5c4
6702387: G1: assertion failure: assert(p == current_top || oop(p)->is_oop(),"p is not a block start")
iveresov
parents:
342
diff
changeset
|
3382 if (obj->is_forwarded() && obj->forwardee() == obj) { |
e0c09f7ec5c4
6702387: G1: assertion failure: assert(p == current_top || oop(p)->is_oop(),"p is not a block start")
iveresov
parents:
342
diff
changeset
|
3383 // The object failed to move. |
e0c09f7ec5c4
6702387: G1: assertion failure: assert(p == current_top || oop(p)->is_oop(),"p is not a block start")
iveresov
parents:
342
diff
changeset
|
3384 assert(!_g1->is_obj_dead(obj), "We should not be preserving dead objs."); |
e0c09f7ec5c4
6702387: G1: assertion failure: assert(p == current_top || oop(p)->is_oop(),"p is not a block start")
iveresov
parents:
342
diff
changeset
|
3385 _cm->markPrev(obj); |
e0c09f7ec5c4
6702387: G1: assertion failure: assert(p == current_top || oop(p)->is_oop(),"p is not a block start")
iveresov
parents:
342
diff
changeset
|
3386 assert(_cm->isPrevMarked(obj), "Should be marked!"); |
e0c09f7ec5c4
6702387: G1: assertion failure: assert(p == current_top || oop(p)->is_oop(),"p is not a block start")
iveresov
parents:
342
diff
changeset
|
3387 _prev_marked_bytes += (obj->size() * HeapWordSize); |
e0c09f7ec5c4
6702387: G1: assertion failure: assert(p == current_top || oop(p)->is_oop(),"p is not a block start")
iveresov
parents:
342
diff
changeset
|
3388 if (_g1->mark_in_progress() && !_g1->is_obj_ill(obj)) { |
e0c09f7ec5c4
6702387: G1: assertion failure: assert(p == current_top || oop(p)->is_oop(),"p is not a block start")
iveresov
parents:
342
diff
changeset
|
3389 _cm->markAndGrayObjectIfNecessary(obj); |
e0c09f7ec5c4
6702387: G1: assertion failure: assert(p == current_top || oop(p)->is_oop(),"p is not a block start")
iveresov
parents:
342
diff
changeset
|
3390 } |
e0c09f7ec5c4
6702387: G1: assertion failure: assert(p == current_top || oop(p)->is_oop(),"p is not a block start")
iveresov
parents:
342
diff
changeset
|
3391 obj->set_mark(markOopDesc::prototype()); |
e0c09f7ec5c4
6702387: G1: assertion failure: assert(p == current_top || oop(p)->is_oop(),"p is not a block start")
iveresov
parents:
342
diff
changeset
|
3392 // While we were processing RSet buffers during the |
e0c09f7ec5c4
6702387: G1: assertion failure: assert(p == current_top || oop(p)->is_oop(),"p is not a block start")
iveresov
parents:
342
diff
changeset
|
3393 // collection, we actually didn't scan any cards on the |
e0c09f7ec5c4
6702387: G1: assertion failure: assert(p == current_top || oop(p)->is_oop(),"p is not a block start")
iveresov
parents:
342
diff
changeset
|
3394 // collection set, since we didn't want to update remebered |
e0c09f7ec5c4
6702387: G1: assertion failure: assert(p == current_top || oop(p)->is_oop(),"p is not a block start")
iveresov
parents:
342
diff
changeset
|
3395 // sets with entries that point into the collection set, given |
e0c09f7ec5c4
6702387: G1: assertion failure: assert(p == current_top || oop(p)->is_oop(),"p is not a block start")
iveresov
parents:
342
diff
changeset
|
3396 // that live objects fromthe collection set are about to move |
e0c09f7ec5c4
6702387: G1: assertion failure: assert(p == current_top || oop(p)->is_oop(),"p is not a block start")
iveresov
parents:
342
diff
changeset
|
3397 // and such entries will be stale very soon. This change also |
e0c09f7ec5c4
6702387: G1: assertion failure: assert(p == current_top || oop(p)->is_oop(),"p is not a block start")
iveresov
parents:
342
diff
changeset
|
3398 // dealt with a reliability issue which involved scanning a |
e0c09f7ec5c4
6702387: G1: assertion failure: assert(p == current_top || oop(p)->is_oop(),"p is not a block start")
iveresov
parents:
342
diff
changeset
|
3399 // card in the collection set and coming across an array that |
e0c09f7ec5c4
6702387: G1: assertion failure: assert(p == current_top || oop(p)->is_oop(),"p is not a block start")
iveresov
parents:
342
diff
changeset
|
3400 // was being chunked and looking malformed. The problem is |
e0c09f7ec5c4
6702387: G1: assertion failure: assert(p == current_top || oop(p)->is_oop(),"p is not a block start")
iveresov
parents:
342
diff
changeset
|
3401 // that, if evacuation fails, we might have remembered set |
e0c09f7ec5c4
6702387: G1: assertion failure: assert(p == current_top || oop(p)->is_oop(),"p is not a block start")
iveresov
parents:
342
diff
changeset
|
3402 // entries missing given that we skipped cards on the |
e0c09f7ec5c4
6702387: G1: assertion failure: assert(p == current_top || oop(p)->is_oop(),"p is not a block start")
iveresov
parents:
342
diff
changeset
|
3403 // collection set. So, we'll recreate such entries now. |
616
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
3404 obj->oop_iterate(_cl); |
352
e0c09f7ec5c4
6702387: G1: assertion failure: assert(p == current_top || oop(p)->is_oop(),"p is not a block start")
iveresov
parents:
342
diff
changeset
|
3405 assert(_cm->isPrevMarked(obj), "Should be marked!"); |
e0c09f7ec5c4
6702387: G1: assertion failure: assert(p == current_top || oop(p)->is_oop(),"p is not a block start")
iveresov
parents:
342
diff
changeset
|
3406 } else { |
e0c09f7ec5c4
6702387: G1: assertion failure: assert(p == current_top || oop(p)->is_oop(),"p is not a block start")
iveresov
parents:
342
diff
changeset
|
3407 // The object has been either evacuated or is dead. Fill it with a |
e0c09f7ec5c4
6702387: G1: assertion failure: assert(p == current_top || oop(p)->is_oop(),"p is not a block start")
iveresov
parents:
342
diff
changeset
|
3408 // dummy object. |
e0c09f7ec5c4
6702387: G1: assertion failure: assert(p == current_top || oop(p)->is_oop(),"p is not a block start")
iveresov
parents:
342
diff
changeset
|
3409 MemRegion mr((HeapWord*)obj, obj->size()); |
481
7d7a7c599c17
6578152: fill_region_with_object has usability and safety issues
jcoomes
parents:
457
diff
changeset
|
3410 CollectedHeap::fill_with_object(mr); |
342 | 3411 _cm->clearRangeBothMaps(mr); |
3412 } | |
3413 } | |
3414 }; | |
3415 | |
3416 void G1CollectedHeap::remove_self_forwarding_pointers() { | |
1705 | 3417 UpdateRSetImmediate immediate_update(_g1h->g1_rem_set()); |
616
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
3418 DirtyCardQueue dcq(&_g1h->dirty_card_queue_set()); |
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
3419 UpdateRSetDeferred deferred_update(_g1h, &dcq); |
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
3420 OopsInHeapRegionClosure *cl; |
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
3421 if (G1DeferredRSUpdate) { |
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
3422 cl = &deferred_update; |
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
3423 } else { |
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
3424 cl = &immediate_update; |
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
3425 } |
342 | 3426 HeapRegion* cur = g1_policy()->collection_set(); |
3427 while (cur != NULL) { | |
3428 assert(g1_policy()->assertMarkedBytesDataOK(), "Should be!"); | |
3429 | |
616
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
3430 RemoveSelfPointerClosure rspc(_g1h, cl); |
342 | 3431 if (cur->evacuation_failed()) { |
3432 assert(cur->in_collection_set(), "bad CS"); | |
616
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
3433 cl->set_region(cur); |
342 | 3434 cur->object_iterate(&rspc); |
3435 | |
3436 // A number of manipulations to make the TAMS be the current top, | |
3437 // and the marked bytes be the ones observed in the iteration. | |
3438 if (_g1h->concurrent_mark()->at_least_one_mark_complete()) { | |
3439 // The comments below are the postconditions achieved by the | |
3440 // calls. Note especially the last such condition, which says that | |
3441 // the count of marked bytes has been properly restored. | |
3442 cur->note_start_of_marking(false); | |
3443 // _next_top_at_mark_start == top, _next_marked_bytes == 0 | |
3444 cur->add_to_marked_bytes(rspc.prev_marked_bytes()); | |
3445 // _next_marked_bytes == prev_marked_bytes. | |
3446 cur->note_end_of_marking(); | |
3447 // _prev_top_at_mark_start == top(), | |
3448 // _prev_marked_bytes == prev_marked_bytes | |
3449 } | |
3450 // If there is no mark in progress, we modified the _next variables | |
3451 // above needlessly, but harmlessly. | |
3452 if (_g1h->mark_in_progress()) { | |
3453 cur->note_start_of_marking(false); | |
3454 // _next_top_at_mark_start == top, _next_marked_bytes == 0 | |
3455 // _next_marked_bytes == next_marked_bytes. | |
3456 } | |
3457 | |
3458 // Now make sure the region has the right index in the sorted array. | |
3459 g1_policy()->note_change_in_marked_bytes(cur); | |
3460 } | |
3461 cur = cur->next_in_collection_set(); | |
3462 } | |
3463 assert(g1_policy()->assertMarkedBytesDataOK(), "Should be!"); | |
3464 | |
3465 // Now restore saved marks, if any. | |
3466 if (_objs_with_preserved_marks != NULL) { | |
3467 assert(_preserved_marks_of_objs != NULL, "Both or none."); | |
3468 assert(_objs_with_preserved_marks->length() == | |
3469 _preserved_marks_of_objs->length(), "Both or none."); | |
3470 guarantee(_objs_with_preserved_marks->length() == | |
3471 _preserved_marks_of_objs->length(), "Both or none."); | |
3472 for (int i = 0; i < _objs_with_preserved_marks->length(); i++) { | |
3473 oop obj = _objs_with_preserved_marks->at(i); | |
3474 markOop m = _preserved_marks_of_objs->at(i); | |
3475 obj->set_mark(m); | |
3476 } | |
3477 // Delete the preserved marks growable arrays (allocated on the C heap). | |
3478 delete _objs_with_preserved_marks; | |
3479 delete _preserved_marks_of_objs; | |
3480 _objs_with_preserved_marks = NULL; | |
3481 _preserved_marks_of_objs = NULL; | |
3482 } | |
3483 } | |
3484 | |
3485 void G1CollectedHeap::push_on_evac_failure_scan_stack(oop obj) { | |
3486 _evac_failure_scan_stack->push(obj); | |
3487 } | |
3488 | |
3489 void G1CollectedHeap::drain_evac_failure_scan_stack() { | |
3490 assert(_evac_failure_scan_stack != NULL, "precondition"); | |
3491 | |
3492 while (_evac_failure_scan_stack->length() > 0) { | |
3493 oop obj = _evac_failure_scan_stack->pop(); | |
3494 _evac_failure_closure->set_region(heap_region_containing(obj)); | |
3495 obj->oop_iterate_backwards(_evac_failure_closure); | |
3496 } | |
3497 } | |
3498 | |
3499 void G1CollectedHeap::handle_evacuation_failure(oop old) { | |
3500 markOop m = old->mark(); | |
3501 // forward to self | |
3502 assert(!old->is_forwarded(), "precondition"); | |
3503 | |
3504 old->forward_to(old); | |
3505 handle_evacuation_failure_common(old, m); | |
3506 } | |
3507 | |
3508 oop | |
3509 G1CollectedHeap::handle_evacuation_failure_par(OopsInHeapRegionClosure* cl, | |
3510 oop old) { | |
3511 markOop m = old->mark(); | |
3512 oop forward_ptr = old->forward_to_atomic(old); | |
3513 if (forward_ptr == NULL) { | |
3514 // Forward-to-self succeeded. | |
3515 if (_evac_failure_closure != cl) { | |
3516 MutexLockerEx x(EvacFailureStack_lock, Mutex::_no_safepoint_check_flag); | |
3517 assert(!_drain_in_progress, | |
3518 "Should only be true while someone holds the lock."); | |
3519 // Set the global evac-failure closure to the current thread's. | |
3520 assert(_evac_failure_closure == NULL, "Or locking has failed."); | |
3521 set_evac_failure_closure(cl); | |
3522 // Now do the common part. | |
3523 handle_evacuation_failure_common(old, m); | |
3524 // Reset to NULL. | |
3525 set_evac_failure_closure(NULL); | |
3526 } else { | |
3527 // The lock is already held, and this is recursive. | |
3528 assert(_drain_in_progress, "This should only be the recursive case."); | |
3529 handle_evacuation_failure_common(old, m); | |
3530 } | |
3531 return old; | |
3532 } else { | |
3533 // Someone else had a place to copy it. | |
3534 return forward_ptr; | |
3535 } | |
3536 } | |
3537 | |
3538 void G1CollectedHeap::handle_evacuation_failure_common(oop old, markOop m) { | |
3539 set_evacuation_failed(true); | |
3540 | |
3541 preserve_mark_if_necessary(old, m); | |
3542 | |
3543 HeapRegion* r = heap_region_containing(old); | |
3544 if (!r->evacuation_failed()) { | |
3545 r->set_evacuation_failed(true); | |
1282 | 3546 if (G1PrintHeapRegions) { |
342 | 3547 gclog_or_tty->print("evacuation failed in heap region "PTR_FORMAT" " |
3548 "["PTR_FORMAT","PTR_FORMAT")\n", | |
3549 r, r->bottom(), r->end()); | |
3550 } | |
3551 } | |
3552 | |
3553 push_on_evac_failure_scan_stack(old); | |
3554 | |
3555 if (!_drain_in_progress) { | |
3556 // prevent recursion in copy_to_survivor_space() | |
3557 _drain_in_progress = true; | |
3558 drain_evac_failure_scan_stack(); | |
3559 _drain_in_progress = false; | |
3560 } | |
3561 } | |
3562 | |
3563 void G1CollectedHeap::preserve_mark_if_necessary(oop obj, markOop m) { | |
3564 if (m != markOopDesc::prototype()) { | |
3565 if (_objs_with_preserved_marks == NULL) { | |
3566 assert(_preserved_marks_of_objs == NULL, "Both or none."); | |
3567 _objs_with_preserved_marks = | |
3568 new (ResourceObj::C_HEAP) GrowableArray<oop>(40, true); | |
3569 _preserved_marks_of_objs = | |
3570 new (ResourceObj::C_HEAP) GrowableArray<markOop>(40, true); | |
3571 } | |
3572 _objs_with_preserved_marks->push(obj); | |
3573 _preserved_marks_of_objs->push(m); | |
3574 } | |
3575 } | |
3576 | |
3577 // *** Parallel G1 Evacuation | |
3578 | |
3579 HeapWord* G1CollectedHeap::par_allocate_during_gc(GCAllocPurpose purpose, | |
3580 size_t word_size) { | |
3581 HeapRegion* alloc_region = _gc_alloc_regions[purpose]; | |
3582 // let the caller handle alloc failure | |
3583 if (alloc_region == NULL) return NULL; | |
3584 | |
3585 HeapWord* block = alloc_region->par_allocate(word_size); | |
3586 if (block == NULL) { | |
3587 MutexLockerEx x(par_alloc_during_gc_lock(), | |
3588 Mutex::_no_safepoint_check_flag); | |
3589 block = allocate_during_gc_slow(purpose, alloc_region, true, word_size); | |
3590 } | |
3591 return block; | |
3592 } | |
3593 | |
545 | 3594 void G1CollectedHeap::retire_alloc_region(HeapRegion* alloc_region, |
3595 bool par) { | |
3596 // Another thread might have obtained alloc_region for the given | |
3597 // purpose, and might be attempting to allocate in it, and might | |
3598 // succeed. Therefore, we can't do the "finalization" stuff on the | |
3599 // region below until we're sure the last allocation has happened. | |
3600 // We ensure this by allocating the remaining space with a garbage | |
3601 // object. | |
3602 if (par) par_allocate_remaining_space(alloc_region); | |
3603 // Now we can do the post-GC stuff on the region. | |
3604 alloc_region->note_end_of_copying(); | |
3605 g1_policy()->record_after_bytes(alloc_region->used()); | |
3606 } | |
3607 | |
342 | 3608 HeapWord* |
3609 G1CollectedHeap::allocate_during_gc_slow(GCAllocPurpose purpose, | |
3610 HeapRegion* alloc_region, | |
3611 bool par, | |
3612 size_t word_size) { | |
3613 HeapWord* block = NULL; | |
3614 // In the parallel case, a previous thread to obtain the lock may have | |
3615 // already assigned a new gc_alloc_region. | |
3616 if (alloc_region != _gc_alloc_regions[purpose]) { | |
3617 assert(par, "But should only happen in parallel case."); | |
3618 alloc_region = _gc_alloc_regions[purpose]; | |
3619 if (alloc_region == NULL) return NULL; | |
3620 block = alloc_region->par_allocate(word_size); | |
3621 if (block != NULL) return block; | |
3622 // Otherwise, continue; this new region is empty, too. | |
3623 } | |
3624 assert(alloc_region != NULL, "We better have an allocation region"); | |
545 | 3625 retire_alloc_region(alloc_region, par); |
342 | 3626 |
3627 if (_gc_alloc_region_counts[purpose] >= g1_policy()->max_regions(purpose)) { | |
3628 // Cannot allocate more regions for the given purpose. | |
3629 GCAllocPurpose alt_purpose = g1_policy()->alternative_purpose(purpose); | |
3630 // Is there an alternative? | |
3631 if (purpose != alt_purpose) { | |
3632 HeapRegion* alt_region = _gc_alloc_regions[alt_purpose]; | |
3633 // Has not the alternative region been aliased? | |
545 | 3634 if (alloc_region != alt_region && alt_region != NULL) { |
342 | 3635 // Try to allocate in the alternative region. |
3636 if (par) { | |
3637 block = alt_region->par_allocate(word_size); | |
3638 } else { | |
3639 block = alt_region->allocate(word_size); | |
3640 } | |
3641 // Make an alias. | |
3642 _gc_alloc_regions[purpose] = _gc_alloc_regions[alt_purpose]; | |
545 | 3643 if (block != NULL) { |
3644 return block; | |
3645 } | |
3646 retire_alloc_region(alt_region, par); | |
342 | 3647 } |
3648 // Both the allocation region and the alternative one are full | |
3649 // and aliased, replace them with a new allocation region. | |
3650 purpose = alt_purpose; | |
3651 } else { | |
3652 set_gc_alloc_region(purpose, NULL); | |
3653 return NULL; | |
3654 } | |
3655 } | |
3656 | |
3657 // Now allocate a new region for allocation. | |
3658 alloc_region = newAllocRegionWithExpansion(purpose, word_size, false /*zero_filled*/); | |
3659 | |
3660 // let the caller handle alloc failure | |
3661 if (alloc_region != NULL) { | |
3662 | |
3663 assert(check_gc_alloc_regions(), "alloc regions messed up"); | |
3664 assert(alloc_region->saved_mark_at_top(), | |
3665 "Mark should have been saved already."); | |
3666 // We used to assert that the region was zero-filled here, but no | |
3667 // longer. | |
3668 | |
3669 // This must be done last: once it's installed, other regions may | |
3670 // allocate in it (without holding the lock.) | |
3671 set_gc_alloc_region(purpose, alloc_region); | |
3672 | |
3673 if (par) { | |
3674 block = alloc_region->par_allocate(word_size); | |
3675 } else { | |
3676 block = alloc_region->allocate(word_size); | |
3677 } | |
3678 // Caller handles alloc failure. | |
3679 } else { | |
3680 // This sets other apis using the same old alloc region to NULL, also. | |
3681 set_gc_alloc_region(purpose, NULL); | |
3682 } | |
3683 return block; // May be NULL. | |
3684 } | |
3685 | |
3686 void G1CollectedHeap::par_allocate_remaining_space(HeapRegion* r) { | |
3687 HeapWord* block = NULL; | |
3688 size_t free_words; | |
3689 do { | |
3690 free_words = r->free()/HeapWordSize; | |
3691 // If there's too little space, no one can allocate, so we're done. | |
1571
2d127394260e
6916623: Align object to 16 bytes to use Compressed Oops with java heap up to 64Gb
kvn
parents:
1547
diff
changeset
|
3692 if (free_words < CollectedHeap::min_fill_size()) return; |
342 | 3693 // Otherwise, try to claim it. |
3694 block = r->par_allocate(free_words); | |
3695 } while (block == NULL); | |
481
7d7a7c599c17
6578152: fill_region_with_object has usability and safety issues
jcoomes
parents:
457
diff
changeset
|
3696 fill_with_object(block, free_words); |
342 | 3697 } |
3698 | |
3699 #ifndef PRODUCT | |
3700 bool GCLabBitMapClosure::do_bit(size_t offset) { | |
3701 HeapWord* addr = _bitmap->offsetToHeapWord(offset); | |
3702 guarantee(_cm->isMarked(oop(addr)), "it should be!"); | |
3703 return true; | |
3704 } | |
3705 #endif // PRODUCT | |
3706 | |
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3707 G1ParScanThreadState::G1ParScanThreadState(G1CollectedHeap* g1h, int queue_num) |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3708 : _g1h(g1h), |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3709 _refs(g1h->task_queue(queue_num)), |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3710 _dcq(&g1h->dirty_card_queue_set()), |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3711 _ct_bs((CardTableModRefBS*)_g1h->barrier_set()), |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3712 _g1_rem(g1h->g1_rem_set()), |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3713 _hash_seed(17), _queue_num(queue_num), |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3714 _term_attempts(0), |
1391
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
3715 _surviving_alloc_buffer(g1h->desired_plab_sz(GCAllocForSurvived)), |
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
3716 _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
|
3717 _age_table(false), |
342 | 3718 #if G1_DETAILED_STATS |
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3719 _pushes(0), _pops(0), _steals(0), |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3720 _steal_attempts(0), _overflow_pushes(0), |
342 | 3721 #endif |
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3722 _strong_roots_time(0), _term_time(0), |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3723 _alloc_buffer_waste(0), _undo_waste(0) |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3724 { |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3725 // we allocate G1YoungSurvRateNumRegions plus one entries, since |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3726 // 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
|
3727 // non-young regions (where the age is -1) |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3728 // 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
|
3729 // an attempt to eliminate cache contention |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3730 size_t real_length = 1 + _g1h->g1_policy()->young_cset_length(); |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3731 size_t array_length = PADDING_ELEM_NUM + |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3732 real_length + |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3733 PADDING_ELEM_NUM; |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3734 _surviving_young_words_base = NEW_C_HEAP_ARRAY(size_t, array_length); |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3735 if (_surviving_young_words_base == NULL) |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3736 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
|
3737 "Not enough space for young surv histo."); |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3738 _surviving_young_words = _surviving_young_words_base + PADDING_ELEM_NUM; |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3739 memset(_surviving_young_words, 0, real_length * sizeof(size_t)); |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3740 |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3741 _overflowed_refs = new OverflowQueue(10); |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3742 |
1391
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
3743 _alloc_buffers[GCAllocForSurvived] = &_surviving_alloc_buffer; |
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
3744 _alloc_buffers[GCAllocForTenured] = &_tenured_alloc_buffer; |
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
3745 |
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3746 _start = os::elapsedTime(); |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3747 } |
342 | 3748 |
3749 G1ParClosureSuper::G1ParClosureSuper(G1CollectedHeap* g1, G1ParScanThreadState* par_scan_state) : | |
3750 _g1(g1), _g1_rem(_g1->g1_rem_set()), _cm(_g1->concurrent_mark()), | |
3751 _par_scan_state(par_scan_state) { } | |
3752 | |
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3753 template <class T> void G1ParCopyHelper::mark_forwardee(T* p) { |
342 | 3754 // This is called _after_ do_oop_work has been called, hence after |
3755 // the object has been relocated to its new location and *p points | |
3756 // to its new location. | |
3757 | |
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3758 T heap_oop = oopDesc::load_heap_oop(p); |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3759 if (!oopDesc::is_null(heap_oop)) { |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3760 oop obj = oopDesc::decode_heap_oop(heap_oop); |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3761 assert((_g1->evacuation_failed()) || (!_g1->obj_in_cs(obj)), |
342 | 3762 "shouldn't still be in the CSet if evacuation didn't fail."); |
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3763 HeapWord* addr = (HeapWord*)obj; |
342 | 3764 if (_g1->is_in_g1_reserved(addr)) |
3765 _cm->grayRoot(oop(addr)); | |
3766 } | |
3767 } | |
3768 | |
3769 oop G1ParCopyHelper::copy_to_survivor_space(oop old) { | |
3770 size_t word_sz = old->size(); | |
3771 HeapRegion* from_region = _g1->heap_region_containing_raw(old); | |
3772 // +1 to make the -1 indexes valid... | |
3773 int young_index = from_region->young_index_in_cset()+1; | |
3774 assert( (from_region->is_young() && young_index > 0) || | |
3775 (!from_region->is_young() && young_index == 0), "invariant" ); | |
3776 G1CollectorPolicy* g1p = _g1->g1_policy(); | |
3777 markOop m = old->mark(); | |
545 | 3778 int age = m->has_displaced_mark_helper() ? m->displaced_mark_helper()->age() |
3779 : m->age(); | |
3780 GCAllocPurpose alloc_purpose = g1p->evacuation_destination(from_region, age, | |
342 | 3781 word_sz); |
3782 HeapWord* obj_ptr = _par_scan_state->allocate(alloc_purpose, word_sz); | |
3783 oop obj = oop(obj_ptr); | |
3784 | |
3785 if (obj_ptr == NULL) { | |
3786 // This will either forward-to-self, or detect that someone else has | |
3787 // installed a forwarding pointer. | |
3788 OopsInHeapRegionClosure* cl = _par_scan_state->evac_failure_closure(); | |
3789 return _g1->handle_evacuation_failure_par(cl, old); | |
3790 } | |
3791 | |
526 | 3792 // We're going to allocate linearly, so might as well prefetch ahead. |
3793 Prefetch::write(obj_ptr, PrefetchCopyIntervalInBytes); | |
3794 | |
342 | 3795 oop forward_ptr = old->forward_to_atomic(obj); |
3796 if (forward_ptr == NULL) { | |
3797 Copy::aligned_disjoint_words((HeapWord*) old, obj_ptr, word_sz); | |
526 | 3798 if (g1p->track_object_age(alloc_purpose)) { |
3799 // We could simply do obj->incr_age(). However, this causes a | |
3800 // performance issue. obj->incr_age() will first check whether | |
3801 // the object has a displaced mark by checking its mark word; | |
3802 // getting the mark word from the new location of the object | |
3803 // stalls. So, given that we already have the mark word and we | |
3804 // are about to install it anyway, it's better to increase the | |
3805 // age on the mark word, when the object does not have a | |
3806 // displaced mark word. We're not expecting many objects to have | |
3807 // a displaced marked word, so that case is not optimized | |
3808 // further (it could be...) and we simply call obj->incr_age(). | |
3809 | |
3810 if (m->has_displaced_mark_helper()) { | |
3811 // in this case, we have to install the mark word first, | |
3812 // otherwise obj looks to be forwarded (the old mark word, | |
3813 // which contains the forward pointer, was copied) | |
3814 obj->set_mark(m); | |
3815 obj->incr_age(); | |
3816 } else { | |
3817 m = m->incr_age(); | |
545 | 3818 obj->set_mark(m); |
526 | 3819 } |
545 | 3820 _par_scan_state->age_table()->add(obj, word_sz); |
3821 } else { | |
3822 obj->set_mark(m); | |
526 | 3823 } |
3824 | |
342 | 3825 // preserve "next" mark bit |
3826 if (_g1->mark_in_progress() && !_g1->is_obj_ill(old)) { | |
3827 if (!use_local_bitmaps || | |
3828 !_par_scan_state->alloc_buffer(alloc_purpose)->mark(obj_ptr)) { | |
3829 // if we couldn't mark it on the local bitmap (this happens when | |
3830 // the object was not allocated in the GCLab), we have to bite | |
3831 // the bullet and do the standard parallel mark | |
3832 _cm->markAndGrayObjectIfNecessary(obj); | |
3833 } | |
3834 #if 1 | |
3835 if (_g1->isMarkedNext(old)) { | |
3836 _cm->nextMarkBitMap()->parClear((HeapWord*)old); | |
3837 } | |
3838 #endif | |
3839 } | |
3840 | |
3841 size_t* surv_young_words = _par_scan_state->surviving_young_words(); | |
3842 surv_young_words[young_index] += word_sz; | |
3843 | |
3844 if (obj->is_objArray() && arrayOop(obj)->length() >= ParGCArrayScanChunk) { | |
3845 arrayOop(old)->set_length(0); | |
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3846 oop* old_p = set_partial_array_mask(old); |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3847 _par_scan_state->push_on_queue(old_p); |
342 | 3848 } else { |
526 | 3849 // No point in using the slower heap_region_containing() method, |
3850 // given that we know obj is in the heap. | |
3851 _scanner->set_region(_g1->heap_region_containing_raw(obj)); | |
342 | 3852 obj->oop_iterate_backwards(_scanner); |
3853 } | |
3854 } else { | |
3855 _par_scan_state->undo_allocation(alloc_purpose, obj_ptr, word_sz); | |
3856 obj = forward_ptr; | |
3857 } | |
3858 return obj; | |
3859 } | |
3860 | |
1261
0414c1049f15
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
1245
diff
changeset
|
3861 template <bool do_gen_barrier, G1Barrier barrier, bool do_mark_forwardee> |
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3862 template <class T> |
1261
0414c1049f15
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
1245
diff
changeset
|
3863 void G1ParCopyClosure <do_gen_barrier, barrier, do_mark_forwardee> |
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3864 ::do_oop_work(T* p) { |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3865 oop obj = oopDesc::load_decode_heap_oop(p); |
342 | 3866 assert(barrier != G1BarrierRS || obj != NULL, |
3867 "Precondition: G1BarrierRS implies obj is nonNull"); | |
3868 | |
526 | 3869 // 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
|
3870 if (_g1->in_cset_fast_test(obj)) { |
342 | 3871 #if G1_REM_SET_LOGGING |
526 | 3872 gclog_or_tty->print_cr("Loc "PTR_FORMAT" contains pointer "PTR_FORMAT" " |
3873 "into CS.", p, (void*) obj); | |
342 | 3874 #endif |
526 | 3875 if (obj->is_forwarded()) { |
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3876 oopDesc::encode_store_heap_oop(p, obj->forwardee()); |
526 | 3877 } else { |
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3878 oop copy_oop = copy_to_survivor_space(obj); |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3879 oopDesc::encode_store_heap_oop(p, copy_oop); |
342 | 3880 } |
526 | 3881 // When scanning the RS, we only care about objs in CS. |
3882 if (barrier == G1BarrierRS) { | |
616
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
3883 _par_scan_state->update_rs(_from, p, _par_scan_state->queue_num()); |
342 | 3884 } |
526 | 3885 } |
3886 | |
3887 if (barrier == G1BarrierEvac && obj != NULL) { | |
616
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
3888 _par_scan_state->update_rs(_from, p, _par_scan_state->queue_num()); |
526 | 3889 } |
3890 | |
3891 if (do_gen_barrier && obj != NULL) { | |
3892 par_do_barrier(p); | |
3893 } | |
3894 } | |
3895 | |
1261
0414c1049f15
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
1245
diff
changeset
|
3896 template void G1ParCopyClosure<false, G1BarrierEvac, false>::do_oop_work(oop* p); |
0414c1049f15
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
1245
diff
changeset
|
3897 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
|
3898 |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3899 template <class T> void G1ParScanPartialArrayClosure::do_oop_nv(T* p) { |
526 | 3900 assert(has_partial_array_mask(p), "invariant"); |
3901 oop old = clear_partial_array_mask(p); | |
342 | 3902 assert(old->is_objArray(), "must be obj array"); |
3903 assert(old->is_forwarded(), "must be forwarded"); | |
3904 assert(Universe::heap()->is_in_reserved(old), "must be in heap."); | |
3905 | |
3906 objArrayOop obj = objArrayOop(old->forwardee()); | |
3907 assert((void*)old != (void*)old->forwardee(), "self forwarding here?"); | |
3908 // Process ParGCArrayScanChunk elements now | |
3909 // and push the remainder back onto queue | |
3910 int start = arrayOop(old)->length(); | |
3911 int end = obj->length(); | |
3912 int remainder = end - start; | |
3913 assert(start <= end, "just checking"); | |
3914 if (remainder > 2 * ParGCArrayScanChunk) { | |
3915 // Test above combines last partial chunk with a full chunk | |
3916 end = start + ParGCArrayScanChunk; | |
3917 arrayOop(old)->set_length(end); | |
3918 // Push remainder. | |
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3919 oop* old_p = set_partial_array_mask(old); |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3920 assert(arrayOop(old)->length() < obj->length(), "Empty push?"); |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3921 _par_scan_state->push_on_queue(old_p); |
342 | 3922 } else { |
3923 // Restore length so that the heap remains parsable in | |
3924 // case of evacuation failure. | |
3925 arrayOop(old)->set_length(end); | |
3926 } | |
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3927 _scanner.set_region(_g1->heap_region_containing_raw(obj)); |
342 | 3928 // process our set of indices (include header in first chunk) |
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3929 obj->oop_iterate_range(&_scanner, start, end); |
342 | 3930 } |
3931 | |
3932 class G1ParEvacuateFollowersClosure : public VoidClosure { | |
3933 protected: | |
3934 G1CollectedHeap* _g1h; | |
3935 G1ParScanThreadState* _par_scan_state; | |
3936 RefToScanQueueSet* _queues; | |
3937 ParallelTaskTerminator* _terminator; | |
3938 | |
3939 G1ParScanThreadState* par_scan_state() { return _par_scan_state; } | |
3940 RefToScanQueueSet* queues() { return _queues; } | |
3941 ParallelTaskTerminator* terminator() { return _terminator; } | |
3942 | |
3943 public: | |
3944 G1ParEvacuateFollowersClosure(G1CollectedHeap* g1h, | |
3945 G1ParScanThreadState* par_scan_state, | |
3946 RefToScanQueueSet* queues, | |
3947 ParallelTaskTerminator* terminator) | |
3948 : _g1h(g1h), _par_scan_state(par_scan_state), | |
3949 _queues(queues), _terminator(terminator) {} | |
3950 | |
3951 void do_void() { | |
3952 G1ParScanThreadState* pss = par_scan_state(); | |
3953 while (true) { | |
3954 pss->trim_queue(); | |
3955 IF_G1_DETAILED_STATS(pss->note_steal_attempt()); | |
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3956 |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3957 StarTask stolen_task; |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3958 if (queues()->steal(pss->queue_num(), pss->hash_seed(), stolen_task)) { |
342 | 3959 IF_G1_DETAILED_STATS(pss->note_steal()); |
526 | 3960 |
3961 // slightly paranoid tests; I'm trying to catch potential | |
3962 // problems before we go into push_on_queue to know where the | |
3963 // problem is coming from | |
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3964 assert((oop*)stolen_task != NULL, "Error"); |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3965 if (stolen_task.is_narrow()) { |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3966 assert(UseCompressedOops, "Error"); |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3967 narrowOop* p = (narrowOop*) stolen_task; |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3968 assert(has_partial_array_mask(p) || |
1261
0414c1049f15
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
1245
diff
changeset
|
3969 _g1h->is_in_g1_reserved(oopDesc::load_decode_heap_oop(p)), "Error"); |
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3970 pss->push_on_queue(p); |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3971 } else { |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3972 oop* p = (oop*) stolen_task; |
1261
0414c1049f15
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
1245
diff
changeset
|
3973 assert(has_partial_array_mask(p) || _g1h->is_in_g1_reserved(*p), "Error"); |
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3974 pss->push_on_queue(p); |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3975 } |
342 | 3976 continue; |
3977 } | |
3978 pss->start_term_time(); | |
3979 if (terminator()->offer_termination()) break; | |
3980 pss->end_term_time(); | |
3981 } | |
3982 pss->end_term_time(); | |
3983 pss->retire_alloc_buffers(); | |
3984 } | |
3985 }; | |
3986 | |
3987 class G1ParTask : public AbstractGangTask { | |
3988 protected: | |
3989 G1CollectedHeap* _g1h; | |
3990 RefToScanQueueSet *_queues; | |
3991 ParallelTaskTerminator _terminator; | |
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3992 int _n_workers; |
342 | 3993 |
3994 Mutex _stats_lock; | |
3995 Mutex* stats_lock() { return &_stats_lock; } | |
3996 | |
3997 size_t getNCards() { | |
3998 return (_g1h->capacity() + G1BlockOffsetSharedArray::N_bytes - 1) | |
3999 / G1BlockOffsetSharedArray::N_bytes; | |
4000 } | |
4001 | |
4002 public: | |
4003 G1ParTask(G1CollectedHeap* g1h, int workers, RefToScanQueueSet *task_queues) | |
4004 : AbstractGangTask("G1 collection"), | |
4005 _g1h(g1h), | |
4006 _queues(task_queues), | |
4007 _terminator(workers, _queues), | |
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4008 _stats_lock(Mutex::leaf, "parallel G1 stats lock", true), |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4009 _n_workers(workers) |
342 | 4010 {} |
4011 | |
4012 RefToScanQueueSet* queues() { return _queues; } | |
4013 | |
4014 RefToScanQueue *work_queue(int i) { | |
4015 return queues()->queue(i); | |
4016 } | |
4017 | |
4018 void work(int i) { | |
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4019 if (i >= _n_workers) return; // no work needed this round |
1611 | 4020 |
4021 double start_time_ms = os::elapsedTime() * 1000.0; | |
4022 _g1h->g1_policy()->record_gc_worker_start_time(i, start_time_ms); | |
4023 | |
342 | 4024 ResourceMark rm; |
4025 HandleMark hm; | |
4026 | |
526 | 4027 G1ParScanThreadState pss(_g1h, i); |
4028 G1ParScanHeapEvacClosure scan_evac_cl(_g1h, &pss); | |
4029 G1ParScanHeapEvacFailureClosure evac_failure_cl(_g1h, &pss); | |
4030 G1ParScanPartialArrayClosure partial_scan_cl(_g1h, &pss); | |
342 | 4031 |
4032 pss.set_evac_closure(&scan_evac_cl); | |
4033 pss.set_evac_failure_closure(&evac_failure_cl); | |
4034 pss.set_partial_scan_closure(&partial_scan_cl); | |
4035 | |
4036 G1ParScanExtRootClosure only_scan_root_cl(_g1h, &pss); | |
4037 G1ParScanPermClosure only_scan_perm_cl(_g1h, &pss); | |
4038 G1ParScanHeapRSClosure only_scan_heap_rs_cl(_g1h, &pss); | |
1261
0414c1049f15
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
1245
diff
changeset
|
4039 G1ParPushHeapRSClosure push_heap_rs_cl(_g1h, &pss); |
616
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
4040 |
342 | 4041 G1ParScanAndMarkExtRootClosure scan_mark_root_cl(_g1h, &pss); |
4042 G1ParScanAndMarkPermClosure scan_mark_perm_cl(_g1h, &pss); | |
4043 G1ParScanAndMarkHeapRSClosure scan_mark_heap_rs_cl(_g1h, &pss); | |
4044 | |
4045 OopsInHeapRegionClosure *scan_root_cl; | |
4046 OopsInHeapRegionClosure *scan_perm_cl; | |
4047 | |
1359
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1313
diff
changeset
|
4048 if (_g1h->g1_policy()->during_initial_mark_pause()) { |
342 | 4049 scan_root_cl = &scan_mark_root_cl; |
4050 scan_perm_cl = &scan_mark_perm_cl; | |
4051 } else { | |
4052 scan_root_cl = &only_scan_root_cl; | |
4053 scan_perm_cl = &only_scan_perm_cl; | |
4054 } | |
4055 | |
4056 pss.start_strong_roots(); | |
4057 _g1h->g1_process_strong_roots(/* not collecting perm */ false, | |
4058 SharedHeap::SO_AllClasses, | |
4059 scan_root_cl, | |
1261
0414c1049f15
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
1245
diff
changeset
|
4060 &push_heap_rs_cl, |
342 | 4061 scan_perm_cl, |
4062 i); | |
4063 pss.end_strong_roots(); | |
4064 { | |
4065 double start = os::elapsedTime(); | |
4066 G1ParEvacuateFollowersClosure evac(_g1h, &pss, _queues, &_terminator); | |
4067 evac.do_void(); | |
4068 double elapsed_ms = (os::elapsedTime()-start)*1000.0; | |
4069 double term_ms = pss.term_time()*1000.0; | |
4070 _g1h->g1_policy()->record_obj_copy_time(i, elapsed_ms-term_ms); | |
1611 | 4071 _g1h->g1_policy()->record_termination(i, term_ms, pss.term_attempts()); |
342 | 4072 } |
1282 | 4073 _g1h->g1_policy()->record_thread_age_table(pss.age_table()); |
342 | 4074 _g1h->update_surviving_young_words(pss.surviving_young_words()+1); |
4075 | |
4076 // Clean up any par-expanded rem sets. | |
4077 HeapRegionRemSet::par_cleanup(); | |
4078 | |
4079 MutexLocker x(stats_lock()); | |
4080 if (ParallelGCVerbose) { | |
4081 gclog_or_tty->print("Thread %d complete:\n", i); | |
4082 #if G1_DETAILED_STATS | |
4083 gclog_or_tty->print(" Pushes: %7d Pops: %7d Overflows: %7d Steals %7d (in %d attempts)\n", | |
4084 pss.pushes(), | |
4085 pss.pops(), | |
4086 pss.overflow_pushes(), | |
4087 pss.steals(), | |
4088 pss.steal_attempts()); | |
4089 #endif | |
4090 double elapsed = pss.elapsed(); | |
4091 double strong_roots = pss.strong_roots_time(); | |
4092 double term = pss.term_time(); | |
4093 gclog_or_tty->print(" Elapsed: %7.2f ms.\n" | |
4094 " Strong roots: %7.2f ms (%6.2f%%)\n" | |
1611 | 4095 " Termination: %7.2f ms (%6.2f%%) " |
4096 "(in "SIZE_FORMAT" entries)\n", | |
342 | 4097 elapsed * 1000.0, |
4098 strong_roots * 1000.0, (strong_roots*100.0/elapsed), | |
4099 term * 1000.0, (term*100.0/elapsed), | |
4100 pss.term_attempts()); | |
4101 size_t total_waste = pss.alloc_buffer_waste() + pss.undo_waste(); | |
4102 gclog_or_tty->print(" Waste: %8dK\n" | |
4103 " Alloc Buffer: %8dK\n" | |
4104 " Undo: %8dK\n", | |
4105 (total_waste * HeapWordSize) / K, | |
4106 (pss.alloc_buffer_waste() * HeapWordSize) / K, | |
4107 (pss.undo_waste() * HeapWordSize) / K); | |
4108 } | |
4109 | |
4110 assert(pss.refs_to_scan() == 0, "Task queue should be empty"); | |
4111 assert(pss.overflowed_refs_to_scan() == 0, "Overflow queue should be empty"); | |
1611 | 4112 double end_time_ms = os::elapsedTime() * 1000.0; |
4113 _g1h->g1_policy()->record_gc_worker_end_time(i, end_time_ms); | |
342 | 4114 } |
4115 }; | |
4116 | |
4117 // *** Common G1 Evacuation Stuff | |
4118 | |
4119 void | |
4120 G1CollectedHeap:: | |
4121 g1_process_strong_roots(bool collecting_perm_gen, | |
4122 SharedHeap::ScanningOption so, | |
4123 OopClosure* scan_non_heap_roots, | |
4124 OopsInHeapRegionClosure* scan_rs, | |
4125 OopsInGenClosure* scan_perm, | |
4126 int worker_i) { | |
4127 // First scan the strong roots, including the perm gen. | |
4128 double ext_roots_start = os::elapsedTime(); | |
4129 double closure_app_time_sec = 0.0; | |
4130 | |
4131 BufferingOopClosure buf_scan_non_heap_roots(scan_non_heap_roots); | |
4132 BufferingOopsInGenClosure buf_scan_perm(scan_perm); | |
4133 buf_scan_perm.set_generation(perm_gen()); | |
4134 | |
989
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
890
diff
changeset
|
4135 // 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
|
4136 // unaligned oop locations. |
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
890
diff
changeset
|
4137 CodeBlobToOopClosure eager_scan_code_roots(scan_non_heap_roots, /*do_marking=*/ true); |
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
890
diff
changeset
|
4138 |
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
890
diff
changeset
|
4139 process_strong_roots(false, // no scoping; this is parallel code |
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
890
diff
changeset
|
4140 collecting_perm_gen, so, |
342 | 4141 &buf_scan_non_heap_roots, |
989
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
890
diff
changeset
|
4142 &eager_scan_code_roots, |
342 | 4143 &buf_scan_perm); |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4144 |
342 | 4145 // Finish up any enqueued closure apps. |
4146 buf_scan_non_heap_roots.done(); | |
4147 buf_scan_perm.done(); | |
4148 double ext_roots_end = os::elapsedTime(); | |
4149 g1_policy()->reset_obj_copy_time(worker_i); | |
4150 double obj_copy_time_sec = | |
4151 buf_scan_non_heap_roots.closure_app_seconds() + | |
4152 buf_scan_perm.closure_app_seconds(); | |
4153 g1_policy()->record_obj_copy_time(worker_i, obj_copy_time_sec * 1000.0); | |
4154 double ext_root_time_ms = | |
4155 ((ext_roots_end - ext_roots_start) - obj_copy_time_sec) * 1000.0; | |
4156 g1_policy()->record_ext_root_scan_time(worker_i, ext_root_time_ms); | |
4157 | |
4158 // Scan strong roots in mark stack. | |
4159 if (!_process_strong_tasks->is_task_claimed(G1H_PS_mark_stack_oops_do)) { | |
4160 concurrent_mark()->oops_do(scan_non_heap_roots); | |
4161 } | |
4162 double mark_stack_scan_ms = (os::elapsedTime() - ext_roots_end) * 1000.0; | |
4163 g1_policy()->record_mark_stack_scan_time(worker_i, mark_stack_scan_ms); | |
4164 | |
4165 // XXX What should this be doing in the parallel case? | |
4166 g1_policy()->record_collection_pause_end_CH_strong_roots(); | |
4167 // Now scan the complement of the collection set. | |
4168 if (scan_rs != NULL) { | |
4169 g1_rem_set()->oops_into_collection_set_do(scan_rs, worker_i); | |
4170 } | |
4171 // Finish with the ref_processor roots. | |
4172 if (!_process_strong_tasks->is_task_claimed(G1H_PS_refProcessor_oops_do)) { | |
4173 ref_processor()->oops_do(scan_non_heap_roots); | |
4174 } | |
4175 g1_policy()->record_collection_pause_end_G1_strong_roots(); | |
4176 _process_strong_tasks->all_tasks_completed(); | |
4177 } | |
4178 | |
4179 void | |
4180 G1CollectedHeap::g1_process_weak_roots(OopClosure* root_closure, | |
4181 OopClosure* non_root_closure) { | |
989
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
890
diff
changeset
|
4182 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
|
4183 SharedHeap::process_weak_roots(root_closure, &roots_in_blobs, non_root_closure); |
342 | 4184 } |
4185 | |
4186 | |
4187 class SaveMarksClosure: public HeapRegionClosure { | |
4188 public: | |
4189 bool doHeapRegion(HeapRegion* r) { | |
4190 r->save_marks(); | |
4191 return false; | |
4192 } | |
4193 }; | |
4194 | |
4195 void G1CollectedHeap::save_marks() { | |
4196 if (ParallelGCThreads == 0) { | |
4197 SaveMarksClosure sm; | |
4198 heap_region_iterate(&sm); | |
4199 } | |
4200 // We do this even in the parallel case | |
4201 perm_gen()->save_marks(); | |
4202 } | |
4203 | |
4204 void G1CollectedHeap::evacuate_collection_set() { | |
4205 set_evacuation_failed(false); | |
4206 | |
4207 g1_rem_set()->prepare_for_oops_into_collection_set_do(); | |
4208 concurrent_g1_refine()->set_use_cache(false); | |
889 | 4209 concurrent_g1_refine()->clear_hot_cache_claimed_index(); |
4210 | |
342 | 4211 int n_workers = (ParallelGCThreads > 0 ? workers()->total_workers() : 1); |
4212 set_par_threads(n_workers); | |
4213 G1ParTask g1_par_task(this, n_workers, _task_queues); | |
4214 | |
4215 init_for_evac_failure(NULL); | |
4216 | |
4217 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
|
4218 |
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
4219 assert(dirty_card_queue_set().completed_buffers_num() == 0, "Should be empty"); |
342 | 4220 double start_par = os::elapsedTime(); |
4221 if (ParallelGCThreads > 0) { | |
4222 // The individual threads will set their evac-failure closures. | |
989
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
890
diff
changeset
|
4223 StrongRootsScope srs(this); |
342 | 4224 workers()->run_task(&g1_par_task); |
4225 } else { | |
989
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
890
diff
changeset
|
4226 StrongRootsScope srs(this); |
342 | 4227 g1_par_task.work(0); |
4228 } | |
4229 | |
4230 double par_time = (os::elapsedTime() - start_par) * 1000.0; | |
4231 g1_policy()->record_par_time(par_time); | |
4232 set_par_threads(0); | |
4233 // Is this the right thing to do here? We don't save marks | |
4234 // on individual heap regions when we allocate from | |
4235 // them in parallel, so this seems like the correct place for this. | |
545 | 4236 retire_all_alloc_regions(); |
342 | 4237 { |
4238 G1IsAliveClosure is_alive(this); | |
4239 G1KeepAliveClosure keep_alive(this); | |
4240 JNIHandles::weak_oops_do(&is_alive, &keep_alive); | |
4241 } | |
940
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
4242 release_gc_alloc_regions(false /* totally */); |
342 | 4243 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
|
4244 |
889 | 4245 concurrent_g1_refine()->clear_hot_cache(); |
342 | 4246 concurrent_g1_refine()->set_use_cache(true); |
4247 | |
4248 finalize_for_evac_failure(); | |
4249 | |
4250 // Must do this before removing self-forwarding pointers, which clears | |
4251 // the per-region evac-failure flags. | |
4252 concurrent_mark()->complete_marking_in_collection_set(); | |
4253 | |
4254 if (evacuation_failed()) { | |
4255 remove_self_forwarding_pointers(); | |
4256 if (PrintGCDetails) { | |
4257 gclog_or_tty->print(" (evacuation failed)"); | |
4258 } else if (PrintGC) { | |
4259 gclog_or_tty->print("--"); | |
4260 } | |
4261 } | |
4262 | |
616
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
4263 if (G1DeferredRSUpdate) { |
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
4264 RedirtyLoggedCardTableEntryFastClosure redirty; |
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
4265 dirty_card_queue_set().set_closure(&redirty); |
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
4266 dirty_card_queue_set().apply_closure_to_all_completed_buffers(); |
1111 | 4267 |
4268 DirtyCardQueueSet& dcq = JavaThread::dirty_card_queue_set(); | |
4269 dcq.merge_bufferlists(&dirty_card_queue_set()); | |
616
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
4270 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
|
4271 } |
342 | 4272 COMPILER2_PRESENT(DerivedPointerTable::update_pointers()); |
4273 } | |
4274 | |
4275 void G1CollectedHeap::free_region(HeapRegion* hr) { | |
4276 size_t pre_used = 0; | |
4277 size_t cleared_h_regions = 0; | |
4278 size_t freed_regions = 0; | |
4279 UncleanRegionList local_list; | |
4280 | |
4281 HeapWord* start = hr->bottom(); | |
4282 HeapWord* end = hr->prev_top_at_mark_start(); | |
4283 size_t used_bytes = hr->used(); | |
4284 size_t live_bytes = hr->max_live_bytes(); | |
4285 if (used_bytes > 0) { | |
4286 guarantee( live_bytes <= used_bytes, "invariant" ); | |
4287 } else { | |
4288 guarantee( live_bytes == 0, "invariant" ); | |
4289 } | |
4290 | |
4291 size_t garbage_bytes = used_bytes - live_bytes; | |
4292 if (garbage_bytes > 0) | |
4293 g1_policy()->decrease_known_garbage_bytes(garbage_bytes); | |
4294 | |
4295 free_region_work(hr, pre_used, cleared_h_regions, freed_regions, | |
4296 &local_list); | |
4297 finish_free_region_work(pre_used, cleared_h_regions, freed_regions, | |
4298 &local_list); | |
4299 } | |
4300 | |
4301 void | |
4302 G1CollectedHeap::free_region_work(HeapRegion* hr, | |
4303 size_t& pre_used, | |
4304 size_t& cleared_h_regions, | |
4305 size_t& freed_regions, | |
4306 UncleanRegionList* list, | |
4307 bool par) { | |
4308 pre_used += hr->used(); | |
4309 if (hr->isHumongous()) { | |
4310 assert(hr->startsHumongous(), | |
4311 "Only the start of a humongous region should be freed."); | |
4312 int ind = _hrs->find(hr); | |
4313 assert(ind != -1, "Should have an index."); | |
4314 // Clear the start region. | |
4315 hr->hr_clear(par, true /*clear_space*/); | |
4316 list->insert_before_head(hr); | |
4317 cleared_h_regions++; | |
4318 freed_regions++; | |
4319 // Clear any continued regions. | |
4320 ind++; | |
4321 while ((size_t)ind < n_regions()) { | |
4322 HeapRegion* hrc = _hrs->at(ind); | |
4323 if (!hrc->continuesHumongous()) break; | |
4324 // Otherwise, does continue the H region. | |
4325 assert(hrc->humongous_start_region() == hr, "Huh?"); | |
4326 hrc->hr_clear(par, true /*clear_space*/); | |
4327 cleared_h_regions++; | |
4328 freed_regions++; | |
4329 list->insert_before_head(hrc); | |
4330 ind++; | |
4331 } | |
4332 } else { | |
4333 hr->hr_clear(par, true /*clear_space*/); | |
4334 list->insert_before_head(hr); | |
4335 freed_regions++; | |
4336 // If we're using clear2, this should not be enabled. | |
4337 // assert(!hr->in_cohort(), "Can't be both free and in a cohort."); | |
4338 } | |
4339 } | |
4340 | |
4341 void G1CollectedHeap::finish_free_region_work(size_t pre_used, | |
4342 size_t cleared_h_regions, | |
4343 size_t freed_regions, | |
4344 UncleanRegionList* list) { | |
4345 if (list != NULL && list->sz() > 0) { | |
4346 prepend_region_list_on_unclean_list(list); | |
4347 } | |
4348 // Acquire a lock, if we're parallel, to update possibly-shared | |
4349 // variables. | |
4350 Mutex* lock = (n_par_threads() > 0) ? ParGCRareEvent_lock : NULL; | |
4351 { | |
4352 MutexLockerEx x(lock, Mutex::_no_safepoint_check_flag); | |
4353 _summary_bytes_used -= pre_used; | |
4354 _num_humongous_regions -= (int) cleared_h_regions; | |
4355 _free_regions += freed_regions; | |
4356 } | |
4357 } | |
4358 | |
4359 | |
4360 void G1CollectedHeap::dirtyCardsForYoungRegions(CardTableModRefBS* ct_bs, HeapRegion* list) { | |
4361 while (list != NULL) { | |
4362 guarantee( list->is_young(), "invariant" ); | |
4363 | |
4364 HeapWord* bottom = list->bottom(); | |
4365 HeapWord* end = list->end(); | |
4366 MemRegion mr(bottom, end); | |
4367 ct_bs->dirty(mr); | |
4368 | |
4369 list = list->get_next_young_region(); | |
4370 } | |
4371 } | |
4372 | |
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
4373 |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
4374 class G1ParCleanupCTTask : public AbstractGangTask { |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
4375 CardTableModRefBS* _ct_bs; |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
4376 G1CollectedHeap* _g1h; |
940
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
4377 HeapRegion* volatile _su_head; |
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
4378 public: |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
4379 G1ParCleanupCTTask(CardTableModRefBS* ct_bs, |
940
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
4380 G1CollectedHeap* g1h, |
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
4381 HeapRegion* survivor_list) : |
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
4382 AbstractGangTask("G1 Par Cleanup CT Task"), |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
4383 _ct_bs(ct_bs), |
940
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
4384 _g1h(g1h), |
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
4385 _su_head(survivor_list) |
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
4386 { } |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
4387 |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
4388 void work(int i) { |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
4389 HeapRegion* r; |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
4390 while (r = _g1h->pop_dirty_cards_region()) { |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
4391 clear_cards(r); |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
4392 } |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4393 // Redirty the cards of the survivor regions. |
940
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
4394 dirty_list(&this->_su_head); |
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
4395 } |
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
4396 |
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
4397 void clear_cards(HeapRegion* r) { |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4398 // Cards for Survivor regions will be dirtied later. |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4399 if (!r->is_survivor()) { |
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
4400 _ct_bs->clear(MemRegion(r->bottom(), r->end())); |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
4401 } |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
4402 } |
940
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
4403 |
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
4404 void dirty_list(HeapRegion* volatile * head_ptr) { |
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
4405 HeapRegion* head; |
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
4406 do { |
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
4407 // Pop region off the list. |
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
4408 head = *head_ptr; |
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
4409 if (head != NULL) { |
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
4410 HeapRegion* r = (HeapRegion*) |
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
4411 Atomic::cmpxchg_ptr(head->get_next_young_region(), head_ptr, head); |
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
4412 if (r == head) { |
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
4413 assert(!r->isHumongous(), "Humongous regions shouldn't be on survivor list"); |
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
4414 _ct_bs->dirty(MemRegion(r->bottom(), r->end())); |
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
4415 } |
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
4416 } |
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
4417 } while (*head_ptr != NULL); |
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
4418 } |
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
4419 }; |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
4420 |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
4421 |
940
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
4422 #ifndef PRODUCT |
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
4423 class G1VerifyCardTableCleanup: public HeapRegionClosure { |
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
4424 CardTableModRefBS* _ct_bs; |
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
4425 public: |
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
4426 G1VerifyCardTableCleanup(CardTableModRefBS* ct_bs) |
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
4427 : _ct_bs(ct_bs) |
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
4428 { } |
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
4429 virtual bool doHeapRegion(HeapRegion* r) |
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
4430 { |
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
4431 MemRegion mr(r->bottom(), r->end()); |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4432 if (r->is_survivor()) { |
940
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
4433 _ct_bs->verify_dirty_region(mr); |
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
4434 } else { |
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
4435 _ct_bs->verify_clean_region(mr); |
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
4436 } |
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
4437 return false; |
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
4438 } |
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
4439 }; |
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
4440 #endif |
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
4441 |
342 | 4442 void G1CollectedHeap::cleanUpCardTable() { |
4443 CardTableModRefBS* ct_bs = (CardTableModRefBS*) (barrier_set()); | |
4444 double start = os::elapsedTime(); | |
4445 | |
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
4446 // Iterate over the dirty cards region list. |
940
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
4447 G1ParCleanupCTTask cleanup_task(ct_bs, this, |
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
4448 _young_list->first_survivor_region()); |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4449 |
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
4450 if (ParallelGCThreads > 0) { |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
4451 set_par_threads(workers()->total_workers()); |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
4452 workers()->run_task(&cleanup_task); |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
4453 set_par_threads(0); |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
4454 } else { |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
4455 while (_dirty_cards_region_list) { |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
4456 HeapRegion* r = _dirty_cards_region_list; |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
4457 cleanup_task.clear_cards(r); |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
4458 _dirty_cards_region_list = r->get_next_dirty_cards_region(); |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
4459 if (_dirty_cards_region_list == r) { |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
4460 // The last region. |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
4461 _dirty_cards_region_list = NULL; |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
4462 } |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
4463 r->set_next_dirty_cards_region(NULL); |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
4464 } |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4465 // now, redirty the cards of the survivor regions |
940
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
4466 // (it seemed faster to do it this way, instead of iterating over |
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
4467 // all regions and then clearing / dirtying as appropriate) |
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
4468 dirtyCardsForYoungRegions(ct_bs, _young_list->first_survivor_region()); |
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
4469 } |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4470 |
342 | 4471 double elapsed = os::elapsedTime() - start; |
4472 g1_policy()->record_clear_ct_time( elapsed * 1000.0); | |
940
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
4473 #ifndef PRODUCT |
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
4474 if (G1VerifyCTCleanup || VerifyAfterGC) { |
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
4475 G1VerifyCardTableCleanup cleanup_verifier(ct_bs); |
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
4476 heap_region_iterate(&cleanup_verifier); |
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
4477 } |
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
4478 #endif |
342 | 4479 } |
4480 | |
4481 void G1CollectedHeap::do_collection_pause_if_appropriate(size_t word_size) { | |
4482 if (g1_policy()->should_do_collection_pause(word_size)) { | |
4483 do_collection_pause(); | |
4484 } | |
4485 } | |
4486 | |
4487 void G1CollectedHeap::free_collection_set(HeapRegion* cs_head) { | |
4488 double young_time_ms = 0.0; | |
4489 double non_young_time_ms = 0.0; | |
4490 | |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4491 // 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
|
4492 // 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
|
4493 // 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
|
4494 _young_list->clear(); |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4495 |
342 | 4496 G1CollectorPolicy* policy = g1_policy(); |
4497 | |
4498 double start_sec = os::elapsedTime(); | |
4499 bool non_young = true; | |
4500 | |
4501 HeapRegion* cur = cs_head; | |
4502 int age_bound = -1; | |
4503 size_t rs_lengths = 0; | |
4504 | |
4505 while (cur != NULL) { | |
4506 if (non_young) { | |
4507 if (cur->is_young()) { | |
4508 double end_sec = os::elapsedTime(); | |
4509 double elapsed_ms = (end_sec - start_sec) * 1000.0; | |
4510 non_young_time_ms += elapsed_ms; | |
4511 | |
4512 start_sec = os::elapsedTime(); | |
4513 non_young = false; | |
4514 } | |
4515 } else { | |
4516 if (!cur->is_on_free_list()) { | |
4517 double end_sec = os::elapsedTime(); | |
4518 double elapsed_ms = (end_sec - start_sec) * 1000.0; | |
4519 young_time_ms += elapsed_ms; | |
4520 | |
4521 start_sec = os::elapsedTime(); | |
4522 non_young = true; | |
4523 } | |
4524 } | |
4525 | |
4526 rs_lengths += cur->rem_set()->occupied(); | |
4527 | |
4528 HeapRegion* next = cur->next_in_collection_set(); | |
4529 assert(cur->in_collection_set(), "bad CS"); | |
4530 cur->set_next_in_collection_set(NULL); | |
4531 cur->set_in_collection_set(false); | |
4532 | |
4533 if (cur->is_young()) { | |
4534 int index = cur->young_index_in_cset(); | |
4535 guarantee( index != -1, "invariant" ); | |
4536 guarantee( (size_t)index < policy->young_cset_length(), "invariant" ); | |
4537 size_t words_survived = _surviving_young_words[index]; | |
4538 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
|
4539 |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4540 // 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
|
4541 // (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
|
4542 // 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
|
4543 // _next_young_region field. |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4544 cur->set_next_young_region(NULL); |
342 | 4545 } else { |
4546 int index = cur->young_index_in_cset(); | |
4547 guarantee( index == -1, "invariant" ); | |
4548 } | |
4549 | |
4550 assert( (cur->is_young() && cur->young_index_in_cset() > -1) || | |
4551 (!cur->is_young() && cur->young_index_in_cset() == -1), | |
4552 "invariant" ); | |
4553 | |
4554 if (!cur->evacuation_failed()) { | |
4555 // And the region is empty. | |
4556 assert(!cur->is_empty(), | |
4557 "Should not have empty regions in a CS."); | |
4558 free_region(cur); | |
4559 } else { | |
4560 cur->uninstall_surv_rate_group(); | |
4561 if (cur->is_young()) | |
4562 cur->set_young_index_in_cset(-1); | |
4563 cur->set_not_young(); | |
4564 cur->set_evacuation_failed(false); | |
4565 } | |
4566 cur = next; | |
4567 } | |
4568 | |
4569 policy->record_max_rs_lengths(rs_lengths); | |
4570 policy->cset_regions_freed(); | |
4571 | |
4572 double end_sec = os::elapsedTime(); | |
4573 double elapsed_ms = (end_sec - start_sec) * 1000.0; | |
4574 if (non_young) | |
4575 non_young_time_ms += elapsed_ms; | |
4576 else | |
4577 young_time_ms += elapsed_ms; | |
4578 | |
4579 policy->record_young_free_cset_time_ms(young_time_ms); | |
4580 policy->record_non_young_free_cset_time_ms(non_young_time_ms); | |
4581 } | |
4582 | |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4583 // 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
|
4584 // 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
|
4585 // 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
|
4586 // 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
|
4587 // 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
|
4588 // 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
|
4589 // 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
|
4590 |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4591 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
|
4592 HeapRegion* cur = cs_head; |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4593 |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4594 while (cur != NULL) { |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4595 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
|
4596 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
|
4597 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
|
4598 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
|
4599 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
|
4600 cur = next; |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4601 } |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4602 } |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4603 |
342 | 4604 HeapRegion* |
4605 G1CollectedHeap::alloc_region_from_unclean_list_locked(bool zero_filled) { | |
4606 assert(ZF_mon->owned_by_self(), "Precondition"); | |
4607 HeapRegion* res = pop_unclean_region_list_locked(); | |
4608 if (res != NULL) { | |
4609 assert(!res->continuesHumongous() && | |
4610 res->zero_fill_state() != HeapRegion::Allocated, | |
4611 "Only free regions on unclean list."); | |
4612 if (zero_filled) { | |
4613 res->ensure_zero_filled_locked(); | |
4614 res->set_zero_fill_allocated(); | |
4615 } | |
4616 } | |
4617 return res; | |
4618 } | |
4619 | |
4620 HeapRegion* G1CollectedHeap::alloc_region_from_unclean_list(bool zero_filled) { | |
4621 MutexLockerEx zx(ZF_mon, Mutex::_no_safepoint_check_flag); | |
4622 return alloc_region_from_unclean_list_locked(zero_filled); | |
4623 } | |
4624 | |
4625 void G1CollectedHeap::put_region_on_unclean_list(HeapRegion* r) { | |
4626 MutexLockerEx x(ZF_mon, Mutex::_no_safepoint_check_flag); | |
4627 put_region_on_unclean_list_locked(r); | |
4628 if (should_zf()) ZF_mon->notify_all(); // Wake up ZF thread. | |
4629 } | |
4630 | |
4631 void G1CollectedHeap::set_unclean_regions_coming(bool b) { | |
4632 MutexLockerEx x(Cleanup_mon); | |
4633 set_unclean_regions_coming_locked(b); | |
4634 } | |
4635 | |
4636 void G1CollectedHeap::set_unclean_regions_coming_locked(bool b) { | |
4637 assert(Cleanup_mon->owned_by_self(), "Precondition"); | |
4638 _unclean_regions_coming = b; | |
4639 // Wake up mutator threads that might be waiting for completeCleanup to | |
4640 // finish. | |
4641 if (!b) Cleanup_mon->notify_all(); | |
4642 } | |
4643 | |
4644 void G1CollectedHeap::wait_for_cleanup_complete() { | |
4645 MutexLockerEx x(Cleanup_mon); | |
4646 wait_for_cleanup_complete_locked(); | |
4647 } | |
4648 | |
4649 void G1CollectedHeap::wait_for_cleanup_complete_locked() { | |
4650 assert(Cleanup_mon->owned_by_self(), "precondition"); | |
4651 while (_unclean_regions_coming) { | |
4652 Cleanup_mon->wait(); | |
4653 } | |
4654 } | |
4655 | |
4656 void | |
4657 G1CollectedHeap::put_region_on_unclean_list_locked(HeapRegion* r) { | |
4658 assert(ZF_mon->owned_by_self(), "precondition."); | |
1545
cc387008223e
6921317: (partial) G1: assert(top() == bottom() || zfs == Allocated,"Region must be empty, or we must be setting it to
apetrusenko
parents:
1489
diff
changeset
|
4659 #ifdef ASSERT |
cc387008223e
6921317: (partial) G1: assert(top() == bottom() || zfs == Allocated,"Region must be empty, or we must be setting it to
apetrusenko
parents:
1489
diff
changeset
|
4660 if (r->is_gc_alloc_region()) { |
cc387008223e
6921317: (partial) G1: assert(top() == bottom() || zfs == Allocated,"Region must be empty, or we must be setting it to
apetrusenko
parents:
1489
diff
changeset
|
4661 ResourceMark rm; |
cc387008223e
6921317: (partial) G1: assert(top() == bottom() || zfs == Allocated,"Region must be empty, or we must be setting it to
apetrusenko
parents:
1489
diff
changeset
|
4662 stringStream region_str; |
cc387008223e
6921317: (partial) G1: assert(top() == bottom() || zfs == Allocated,"Region must be empty, or we must be setting it to
apetrusenko
parents:
1489
diff
changeset
|
4663 print_on(®ion_str); |
cc387008223e
6921317: (partial) G1: assert(top() == bottom() || zfs == Allocated,"Region must be empty, or we must be setting it to
apetrusenko
parents:
1489
diff
changeset
|
4664 assert(!r->is_gc_alloc_region(), err_msg("Unexpected GC allocation region: %s", |
cc387008223e
6921317: (partial) G1: assert(top() == bottom() || zfs == Allocated,"Region must be empty, or we must be setting it to
apetrusenko
parents:
1489
diff
changeset
|
4665 region_str.as_string())); |
cc387008223e
6921317: (partial) G1: assert(top() == bottom() || zfs == Allocated,"Region must be empty, or we must be setting it to
apetrusenko
parents:
1489
diff
changeset
|
4666 } |
cc387008223e
6921317: (partial) G1: assert(top() == bottom() || zfs == Allocated,"Region must be empty, or we must be setting it to
apetrusenko
parents:
1489
diff
changeset
|
4667 #endif |
342 | 4668 _unclean_region_list.insert_before_head(r); |
4669 } | |
4670 | |
4671 void | |
4672 G1CollectedHeap::prepend_region_list_on_unclean_list(UncleanRegionList* list) { | |
4673 MutexLockerEx x(ZF_mon, Mutex::_no_safepoint_check_flag); | |
4674 prepend_region_list_on_unclean_list_locked(list); | |
4675 if (should_zf()) ZF_mon->notify_all(); // Wake up ZF thread. | |
4676 } | |
4677 | |
4678 void | |
4679 G1CollectedHeap:: | |
4680 prepend_region_list_on_unclean_list_locked(UncleanRegionList* list) { | |
4681 assert(ZF_mon->owned_by_self(), "precondition."); | |
4682 _unclean_region_list.prepend_list(list); | |
4683 } | |
4684 | |
4685 HeapRegion* G1CollectedHeap::pop_unclean_region_list_locked() { | |
4686 assert(ZF_mon->owned_by_self(), "precondition."); | |
4687 HeapRegion* res = _unclean_region_list.pop(); | |
4688 if (res != NULL) { | |
4689 // Inform ZF thread that there's a new unclean head. | |
4690 if (_unclean_region_list.hd() != NULL && should_zf()) | |
4691 ZF_mon->notify_all(); | |
4692 } | |
4693 return res; | |
4694 } | |
4695 | |
4696 HeapRegion* G1CollectedHeap::peek_unclean_region_list_locked() { | |
4697 assert(ZF_mon->owned_by_self(), "precondition."); | |
4698 return _unclean_region_list.hd(); | |
4699 } | |
4700 | |
4701 | |
4702 bool G1CollectedHeap::move_cleaned_region_to_free_list_locked() { | |
4703 assert(ZF_mon->owned_by_self(), "Precondition"); | |
4704 HeapRegion* r = peek_unclean_region_list_locked(); | |
4705 if (r != NULL && r->zero_fill_state() == HeapRegion::ZeroFilled) { | |
4706 // Result of below must be equal to "r", since we hold the lock. | |
4707 (void)pop_unclean_region_list_locked(); | |
4708 put_free_region_on_list_locked(r); | |
4709 return true; | |
4710 } else { | |
4711 return false; | |
4712 } | |
4713 } | |
4714 | |
4715 bool G1CollectedHeap::move_cleaned_region_to_free_list() { | |
4716 MutexLockerEx x(ZF_mon, Mutex::_no_safepoint_check_flag); | |
4717 return move_cleaned_region_to_free_list_locked(); | |
4718 } | |
4719 | |
4720 | |
4721 void G1CollectedHeap::put_free_region_on_list_locked(HeapRegion* r) { | |
4722 assert(ZF_mon->owned_by_self(), "precondition."); | |
4723 assert(_free_region_list_size == free_region_list_length(), "Inv"); | |
4724 assert(r->zero_fill_state() == HeapRegion::ZeroFilled, | |
4725 "Regions on free list must be zero filled"); | |
4726 assert(!r->isHumongous(), "Must not be humongous."); | |
4727 assert(r->is_empty(), "Better be empty"); | |
4728 assert(!r->is_on_free_list(), | |
4729 "Better not already be on free list"); | |
4730 assert(!r->is_on_unclean_list(), | |
4731 "Better not already be on unclean list"); | |
4732 r->set_on_free_list(true); | |
4733 r->set_next_on_free_list(_free_region_list); | |
4734 _free_region_list = r; | |
4735 _free_region_list_size++; | |
4736 assert(_free_region_list_size == free_region_list_length(), "Inv"); | |
4737 } | |
4738 | |
4739 void G1CollectedHeap::put_free_region_on_list(HeapRegion* r) { | |
4740 MutexLockerEx x(ZF_mon, Mutex::_no_safepoint_check_flag); | |
4741 put_free_region_on_list_locked(r); | |
4742 } | |
4743 | |
4744 HeapRegion* G1CollectedHeap::pop_free_region_list_locked() { | |
4745 assert(ZF_mon->owned_by_self(), "precondition."); | |
4746 assert(_free_region_list_size == free_region_list_length(), "Inv"); | |
4747 HeapRegion* res = _free_region_list; | |
4748 if (res != NULL) { | |
4749 _free_region_list = res->next_from_free_list(); | |
4750 _free_region_list_size--; | |
4751 res->set_on_free_list(false); | |
4752 res->set_next_on_free_list(NULL); | |
4753 assert(_free_region_list_size == free_region_list_length(), "Inv"); | |
4754 } | |
4755 return res; | |
4756 } | |
4757 | |
4758 | |
4759 HeapRegion* G1CollectedHeap::alloc_free_region_from_lists(bool zero_filled) { | |
4760 // By self, or on behalf of self. | |
4761 assert(Heap_lock->is_locked(), "Precondition"); | |
4762 HeapRegion* res = NULL; | |
4763 bool first = true; | |
4764 while (res == NULL) { | |
4765 if (zero_filled || !first) { | |
4766 MutexLockerEx x(ZF_mon, Mutex::_no_safepoint_check_flag); | |
4767 res = pop_free_region_list_locked(); | |
4768 if (res != NULL) { | |
4769 assert(!res->zero_fill_is_allocated(), | |
4770 "No allocated regions on free list."); | |
4771 res->set_zero_fill_allocated(); | |
4772 } else if (!first) { | |
4773 break; // We tried both, time to return NULL. | |
4774 } | |
4775 } | |
4776 | |
4777 if (res == NULL) { | |
4778 res = alloc_region_from_unclean_list(zero_filled); | |
4779 } | |
4780 assert(res == NULL || | |
4781 !zero_filled || | |
4782 res->zero_fill_is_allocated(), | |
4783 "We must have allocated the region we're returning"); | |
4784 first = false; | |
4785 } | |
4786 return res; | |
4787 } | |
4788 | |
4789 void G1CollectedHeap::remove_allocated_regions_from_lists() { | |
4790 MutexLockerEx x(ZF_mon, Mutex::_no_safepoint_check_flag); | |
4791 { | |
4792 HeapRegion* prev = NULL; | |
4793 HeapRegion* cur = _unclean_region_list.hd(); | |
4794 while (cur != NULL) { | |
4795 HeapRegion* next = cur->next_from_unclean_list(); | |
4796 if (cur->zero_fill_is_allocated()) { | |
4797 // Remove from the list. | |
4798 if (prev == NULL) { | |
4799 (void)_unclean_region_list.pop(); | |
4800 } else { | |
4801 _unclean_region_list.delete_after(prev); | |
4802 } | |
4803 cur->set_on_unclean_list(false); | |
4804 cur->set_next_on_unclean_list(NULL); | |
4805 } else { | |
4806 prev = cur; | |
4807 } | |
4808 cur = next; | |
4809 } | |
4810 assert(_unclean_region_list.sz() == unclean_region_list_length(), | |
4811 "Inv"); | |
4812 } | |
4813 | |
4814 { | |
4815 HeapRegion* prev = NULL; | |
4816 HeapRegion* cur = _free_region_list; | |
4817 while (cur != NULL) { | |
4818 HeapRegion* next = cur->next_from_free_list(); | |
4819 if (cur->zero_fill_is_allocated()) { | |
4820 // Remove from the list. | |
4821 if (prev == NULL) { | |
4822 _free_region_list = cur->next_from_free_list(); | |
4823 } else { | |
4824 prev->set_next_on_free_list(cur->next_from_free_list()); | |
4825 } | |
4826 cur->set_on_free_list(false); | |
4827 cur->set_next_on_free_list(NULL); | |
4828 _free_region_list_size--; | |
4829 } else { | |
4830 prev = cur; | |
4831 } | |
4832 cur = next; | |
4833 } | |
4834 assert(_free_region_list_size == free_region_list_length(), "Inv"); | |
4835 } | |
4836 } | |
4837 | |
4838 bool G1CollectedHeap::verify_region_lists() { | |
4839 MutexLockerEx x(ZF_mon, Mutex::_no_safepoint_check_flag); | |
4840 return verify_region_lists_locked(); | |
4841 } | |
4842 | |
4843 bool G1CollectedHeap::verify_region_lists_locked() { | |
4844 HeapRegion* unclean = _unclean_region_list.hd(); | |
4845 while (unclean != NULL) { | |
4846 guarantee(unclean->is_on_unclean_list(), "Well, it is!"); | |
4847 guarantee(!unclean->is_on_free_list(), "Well, it shouldn't be!"); | |
4848 guarantee(unclean->zero_fill_state() != HeapRegion::Allocated, | |
4849 "Everything else is possible."); | |
4850 unclean = unclean->next_from_unclean_list(); | |
4851 } | |
4852 guarantee(_unclean_region_list.sz() == unclean_region_list_length(), "Inv"); | |
4853 | |
4854 HeapRegion* free_r = _free_region_list; | |
4855 while (free_r != NULL) { | |
4856 assert(free_r->is_on_free_list(), "Well, it is!"); | |
4857 assert(!free_r->is_on_unclean_list(), "Well, it shouldn't be!"); | |
4858 switch (free_r->zero_fill_state()) { | |
4859 case HeapRegion::NotZeroFilled: | |
4860 case HeapRegion::ZeroFilling: | |
4861 guarantee(false, "Should not be on free list."); | |
4862 break; | |
4863 default: | |
4864 // Everything else is possible. | |
4865 break; | |
4866 } | |
4867 free_r = free_r->next_from_free_list(); | |
4868 } | |
4869 guarantee(_free_region_list_size == free_region_list_length(), "Inv"); | |
4870 // If we didn't do an assertion... | |
4871 return true; | |
4872 } | |
4873 | |
4874 size_t G1CollectedHeap::free_region_list_length() { | |
4875 assert(ZF_mon->owned_by_self(), "precondition."); | |
4876 size_t len = 0; | |
4877 HeapRegion* cur = _free_region_list; | |
4878 while (cur != NULL) { | |
4879 len++; | |
4880 cur = cur->next_from_free_list(); | |
4881 } | |
4882 return len; | |
4883 } | |
4884 | |
4885 size_t G1CollectedHeap::unclean_region_list_length() { | |
4886 assert(ZF_mon->owned_by_self(), "precondition."); | |
4887 return _unclean_region_list.length(); | |
4888 } | |
4889 | |
4890 size_t G1CollectedHeap::n_regions() { | |
4891 return _hrs->length(); | |
4892 } | |
4893 | |
4894 size_t G1CollectedHeap::max_regions() { | |
4895 return | |
4896 (size_t)align_size_up(g1_reserved_obj_bytes(), HeapRegion::GrainBytes) / | |
4897 HeapRegion::GrainBytes; | |
4898 } | |
4899 | |
4900 size_t G1CollectedHeap::free_regions() { | |
4901 /* Possibly-expensive assert. | |
4902 assert(_free_regions == count_free_regions(), | |
4903 "_free_regions is off."); | |
4904 */ | |
4905 return _free_regions; | |
4906 } | |
4907 | |
4908 bool G1CollectedHeap::should_zf() { | |
4909 return _free_region_list_size < (size_t) G1ConcZFMaxRegions; | |
4910 } | |
4911 | |
4912 class RegionCounter: public HeapRegionClosure { | |
4913 size_t _n; | |
4914 public: | |
4915 RegionCounter() : _n(0) {} | |
4916 bool doHeapRegion(HeapRegion* r) { | |
677 | 4917 if (r->is_empty()) { |
342 | 4918 assert(!r->isHumongous(), "H regions should not be empty."); |
4919 _n++; | |
4920 } | |
4921 return false; | |
4922 } | |
4923 int res() { return (int) _n; } | |
4924 }; | |
4925 | |
4926 size_t G1CollectedHeap::count_free_regions() { | |
4927 RegionCounter rc; | |
4928 heap_region_iterate(&rc); | |
4929 size_t n = rc.res(); | |
4930 if (_cur_alloc_region != NULL && _cur_alloc_region->is_empty()) | |
4931 n--; | |
4932 return n; | |
4933 } | |
4934 | |
4935 size_t G1CollectedHeap::count_free_regions_list() { | |
4936 size_t n = 0; | |
4937 size_t o = 0; | |
4938 ZF_mon->lock_without_safepoint_check(); | |
4939 HeapRegion* cur = _free_region_list; | |
4940 while (cur != NULL) { | |
4941 cur = cur->next_from_free_list(); | |
4942 n++; | |
4943 } | |
4944 size_t m = unclean_region_list_length(); | |
4945 ZF_mon->unlock(); | |
4946 return n + m; | |
4947 } | |
4948 | |
4949 bool G1CollectedHeap::should_set_young_locked() { | |
4950 assert(heap_lock_held_for_gc(), | |
4951 "the heap lock should already be held by or for this thread"); | |
4952 return (g1_policy()->in_young_gc_mode() && | |
4953 g1_policy()->should_add_next_region_to_young_list()); | |
4954 } | |
4955 | |
4956 void G1CollectedHeap::set_region_short_lived_locked(HeapRegion* hr) { | |
4957 assert(heap_lock_held_for_gc(), | |
4958 "the heap lock should already be held by or for this thread"); | |
4959 _young_list->push_region(hr); | |
4960 g1_policy()->set_region_short_lived(hr); | |
4961 } | |
4962 | |
4963 class NoYoungRegionsClosure: public HeapRegionClosure { | |
4964 private: | |
4965 bool _success; | |
4966 public: | |
4967 NoYoungRegionsClosure() : _success(true) { } | |
4968 bool doHeapRegion(HeapRegion* r) { | |
4969 if (r->is_young()) { | |
4970 gclog_or_tty->print_cr("Region ["PTR_FORMAT", "PTR_FORMAT") tagged as young", | |
4971 r->bottom(), r->end()); | |
4972 _success = false; | |
4973 } | |
4974 return false; | |
4975 } | |
4976 bool success() { return _success; } | |
4977 }; | |
4978 | |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4979 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
|
4980 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
|
4981 |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4982 if (check_heap) { |
342 | 4983 NoYoungRegionsClosure closure; |
4984 heap_region_iterate(&closure); | |
4985 ret = ret && closure.success(); | |
4986 } | |
4987 | |
4988 return ret; | |
4989 } | |
4990 | |
4991 void G1CollectedHeap::empty_young_list() { | |
4992 assert(heap_lock_held_for_gc(), | |
4993 "the heap lock should already be held by or for this thread"); | |
4994 assert(g1_policy()->in_young_gc_mode(), "should be in young GC mode"); | |
4995 | |
4996 _young_list->empty_list(); | |
4997 } | |
4998 | |
4999 bool G1CollectedHeap::all_alloc_regions_no_allocs_since_save_marks() { | |
5000 bool no_allocs = true; | |
5001 for (int ap = 0; ap < GCAllocPurposeCount && no_allocs; ++ap) { | |
5002 HeapRegion* r = _gc_alloc_regions[ap]; | |
5003 no_allocs = r == NULL || r->saved_mark_at_top(); | |
5004 } | |
5005 return no_allocs; | |
5006 } | |
5007 | |
545 | 5008 void G1CollectedHeap::retire_all_alloc_regions() { |
342 | 5009 for (int ap = 0; ap < GCAllocPurposeCount; ++ap) { |
5010 HeapRegion* r = _gc_alloc_regions[ap]; | |
5011 if (r != NULL) { | |
5012 // Check for aliases. | |
5013 bool has_processed_alias = false; | |
5014 for (int i = 0; i < ap; ++i) { | |
5015 if (_gc_alloc_regions[i] == r) { | |
5016 has_processed_alias = true; | |
5017 break; | |
5018 } | |
5019 } | |
5020 if (!has_processed_alias) { | |
545 | 5021 retire_alloc_region(r, false /* par */); |
342 | 5022 } |
5023 } | |
5024 } | |
5025 } | |
5026 | |
5027 | |
5028 // Done at the start of full GC. | |
5029 void G1CollectedHeap::tear_down_region_lists() { | |
5030 MutexLockerEx x(ZF_mon, Mutex::_no_safepoint_check_flag); | |
5031 while (pop_unclean_region_list_locked() != NULL) ; | |
5032 assert(_unclean_region_list.hd() == NULL && _unclean_region_list.sz() == 0, | |
1489
cff162798819
6888953: some calls to function-like macros are missing semicolons
jcoomes
parents:
1394
diff
changeset
|
5033 "Postconditions of loop."); |
342 | 5034 while (pop_free_region_list_locked() != NULL) ; |
5035 assert(_free_region_list == NULL, "Postcondition of loop."); | |
5036 if (_free_region_list_size != 0) { | |
5037 gclog_or_tty->print_cr("Size is %d.", _free_region_list_size); | |
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
5038 print_on(gclog_or_tty, true /* extended */); |
342 | 5039 } |
5040 assert(_free_region_list_size == 0, "Postconditions of loop."); | |
5041 } | |
5042 | |
5043 | |
5044 class RegionResetter: public HeapRegionClosure { | |
5045 G1CollectedHeap* _g1; | |
5046 int _n; | |
5047 public: | |
5048 RegionResetter() : _g1(G1CollectedHeap::heap()), _n(0) {} | |
5049 bool doHeapRegion(HeapRegion* r) { | |
5050 if (r->continuesHumongous()) return false; | |
5051 if (r->top() > r->bottom()) { | |
5052 if (r->top() < r->end()) { | |
5053 Copy::fill_to_words(r->top(), | |
5054 pointer_delta(r->end(), r->top())); | |
5055 } | |
5056 r->set_zero_fill_allocated(); | |
5057 } else { | |
5058 assert(r->is_empty(), "tautology"); | |
677 | 5059 _n++; |
5060 switch (r->zero_fill_state()) { | |
342 | 5061 case HeapRegion::NotZeroFilled: |
5062 case HeapRegion::ZeroFilling: | |
5063 _g1->put_region_on_unclean_list_locked(r); | |
5064 break; | |
5065 case HeapRegion::Allocated: | |
5066 r->set_zero_fill_complete(); | |
5067 // no break; go on to put on free list. | |
5068 case HeapRegion::ZeroFilled: | |
5069 _g1->put_free_region_on_list_locked(r); | |
5070 break; | |
5071 } | |
5072 } | |
5073 return false; | |
5074 } | |
5075 | |
5076 int getFreeRegionCount() {return _n;} | |
5077 }; | |
5078 | |
5079 // Done at the end of full GC. | |
5080 void G1CollectedHeap::rebuild_region_lists() { | |
5081 MutexLockerEx x(ZF_mon, Mutex::_no_safepoint_check_flag); | |
5082 // This needs to go at the end of the full GC. | |
5083 RegionResetter rs; | |
5084 heap_region_iterate(&rs); | |
5085 _free_regions = rs.getFreeRegionCount(); | |
5086 // Tell the ZF thread it may have work to do. | |
5087 if (should_zf()) ZF_mon->notify_all(); | |
5088 } | |
5089 | |
5090 class UsedRegionsNeedZeroFillSetter: public HeapRegionClosure { | |
5091 G1CollectedHeap* _g1; | |
5092 int _n; | |
5093 public: | |
5094 UsedRegionsNeedZeroFillSetter() : _g1(G1CollectedHeap::heap()), _n(0) {} | |
5095 bool doHeapRegion(HeapRegion* r) { | |
5096 if (r->continuesHumongous()) return false; | |
5097 if (r->top() > r->bottom()) { | |
5098 // There are assertions in "set_zero_fill_needed()" below that | |
5099 // require top() == bottom(), so this is technically illegal. | |
5100 // We'll skirt the law here, by making that true temporarily. | |
5101 DEBUG_ONLY(HeapWord* save_top = r->top(); | |
5102 r->set_top(r->bottom())); | |
5103 r->set_zero_fill_needed(); | |
5104 DEBUG_ONLY(r->set_top(save_top)); | |
5105 } | |
5106 return false; | |
5107 } | |
5108 }; | |
5109 | |
5110 // Done at the start of full GC. | |
5111 void G1CollectedHeap::set_used_regions_to_need_zero_fill() { | |
5112 MutexLockerEx x(ZF_mon, Mutex::_no_safepoint_check_flag); | |
5113 // This needs to go at the end of the full GC. | |
5114 UsedRegionsNeedZeroFillSetter rs; | |
5115 heap_region_iterate(&rs); | |
5116 } | |
5117 | |
5118 void G1CollectedHeap::set_refine_cte_cl_concurrency(bool concurrent) { | |
5119 _refine_cte_cl->set_concurrent(concurrent); | |
5120 } | |
5121 | |
5122 #ifndef PRODUCT | |
5123 | |
5124 class PrintHeapRegionClosure: public HeapRegionClosure { | |
5125 public: | |
5126 bool doHeapRegion(HeapRegion *r) { | |
5127 gclog_or_tty->print("Region: "PTR_FORMAT":", r); | |
5128 if (r != NULL) { | |
5129 if (r->is_on_free_list()) | |
5130 gclog_or_tty->print("Free "); | |
5131 if (r->is_young()) | |
5132 gclog_or_tty->print("Young "); | |
5133 if (r->isHumongous()) | |
5134 gclog_or_tty->print("Is Humongous "); | |
5135 r->print(); | |
5136 } | |
5137 return false; | |
5138 } | |
5139 }; | |
5140 | |
5141 class SortHeapRegionClosure : public HeapRegionClosure { | |
5142 size_t young_regions,free_regions, unclean_regions; | |
5143 size_t hum_regions, count; | |
5144 size_t unaccounted, cur_unclean, cur_alloc; | |
5145 size_t total_free; | |
5146 HeapRegion* cur; | |
5147 public: | |
5148 SortHeapRegionClosure(HeapRegion *_cur) : cur(_cur), young_regions(0), | |
5149 free_regions(0), unclean_regions(0), | |
5150 hum_regions(0), | |
5151 count(0), unaccounted(0), | |
5152 cur_alloc(0), total_free(0) | |
5153 {} | |
5154 bool doHeapRegion(HeapRegion *r) { | |
5155 count++; | |
5156 if (r->is_on_free_list()) free_regions++; | |
5157 else if (r->is_on_unclean_list()) unclean_regions++; | |
5158 else if (r->isHumongous()) hum_regions++; | |
5159 else if (r->is_young()) young_regions++; | |
5160 else if (r == cur) cur_alloc++; | |
5161 else unaccounted++; | |
5162 return false; | |
5163 } | |
5164 void print() { | |
5165 total_free = free_regions + unclean_regions; | |
5166 gclog_or_tty->print("%d regions\n", count); | |
5167 gclog_or_tty->print("%d free: free_list = %d unclean = %d\n", | |
5168 total_free, free_regions, unclean_regions); | |
5169 gclog_or_tty->print("%d humongous %d young\n", | |
5170 hum_regions, young_regions); | |
5171 gclog_or_tty->print("%d cur_alloc\n", cur_alloc); | |
5172 gclog_or_tty->print("UHOH unaccounted = %d\n", unaccounted); | |
5173 } | |
5174 }; | |
5175 | |
5176 void G1CollectedHeap::print_region_counts() { | |
5177 SortHeapRegionClosure sc(_cur_alloc_region); | |
5178 PrintHeapRegionClosure cl; | |
5179 heap_region_iterate(&cl); | |
5180 heap_region_iterate(&sc); | |
5181 sc.print(); | |
5182 print_region_accounting_info(); | |
5183 }; | |
5184 | |
5185 bool G1CollectedHeap::regions_accounted_for() { | |
5186 // TODO: regions accounting for young/survivor/tenured | |
5187 return true; | |
5188 } | |
5189 | |
5190 bool G1CollectedHeap::print_region_accounting_info() { | |
5191 gclog_or_tty->print_cr("Free regions: %d (count: %d count list %d) (clean: %d unclean: %d).", | |
5192 free_regions(), | |
5193 count_free_regions(), count_free_regions_list(), | |
5194 _free_region_list_size, _unclean_region_list.sz()); | |
5195 gclog_or_tty->print_cr("cur_alloc: %d.", | |
5196 (_cur_alloc_region == NULL ? 0 : 1)); | |
5197 gclog_or_tty->print_cr("H regions: %d.", _num_humongous_regions); | |
5198 | |
5199 // TODO: check regions accounting for young/survivor/tenured | |
5200 return true; | |
5201 } | |
5202 | |
5203 bool G1CollectedHeap::is_in_closed_subset(const void* p) const { | |
5204 HeapRegion* hr = heap_region_containing(p); | |
5205 if (hr == NULL) { | |
5206 return is_in_permanent(p); | |
5207 } else { | |
5208 return hr->is_in(p); | |
5209 } | |
5210 } | |
941 | 5211 #endif // !PRODUCT |
342 | 5212 |
5213 void G1CollectedHeap::g1_unimplemented() { | |
5214 // Unimplemented(); | |
5215 } |