Mercurial > hg > truffle
annotate src/share/vm/gc_implementation/g1/heapRegion.hpp @ 16352:00460aab5c96
Make sure LoopEx.reassociateInvariants doesn't leave dead nodes behind
author | Gilles Duboscq <duboscq@ssw.jku.at> |
---|---|
date | Tue, 01 Jul 2014 19:06:06 +0200 |
parents | 40136aa2cdb1 |
children | 96b1c2e06e25 |
rev | line source |
---|---|
342 | 1 /* |
12233
40136aa2cdb1
8010722: assert: failed: heap size is too big for compressed oops
tschatzl
parents:
12178
diff
changeset
|
2 * Copyright (c) 2001, 2013, 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:
1394
diff
changeset
|
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
trims
parents:
1394
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:
1394
diff
changeset
|
21 * questions. |
342 | 22 * |
23 */ | |
24 | |
1972 | 25 #ifndef SHARE_VM_GC_IMPLEMENTATION_G1_HEAPREGION_HPP |
26 #define SHARE_VM_GC_IMPLEMENTATION_G1_HEAPREGION_HPP | |
27 | |
28 #include "gc_implementation/g1/g1BlockOffsetTable.inline.hpp" | |
29 #include "gc_implementation/g1/g1_specialized_oop_closures.hpp" | |
30 #include "gc_implementation/g1/survRateGroup.hpp" | |
31 #include "gc_implementation/shared/ageTable.hpp" | |
32 #include "gc_implementation/shared/spaceDecorator.hpp" | |
33 #include "memory/space.inline.hpp" | |
34 #include "memory/watermark.hpp" | |
8001
db9981fd3124
8005915: Unify SERIALGC and INCLUDE_ALTERNATE_GCS
jprovino
parents:
6754
diff
changeset
|
35 #include "utilities/macros.hpp" |
1972 | 36 |
8001
db9981fd3124
8005915: Unify SERIALGC and INCLUDE_ALTERNATE_GCS
jprovino
parents:
6754
diff
changeset
|
37 #if INCLUDE_ALL_GCS |
342 | 38 |
39 // A HeapRegion is the smallest piece of a G1CollectedHeap that | |
40 // can be collected independently. | |
41 | |
42 // NOTE: Although a HeapRegion is a Space, its | |
43 // Space::initDirtyCardClosure method must not be called. | |
44 // The problem is that the existence of this method breaks | |
45 // the independence of barrier sets from remembered sets. | |
46 // The solution is to remove this method from the definition | |
47 // of a Space. | |
48 | |
49 class CompactibleSpace; | |
50 class ContiguousSpace; | |
51 class HeapRegionRemSet; | |
52 class HeapRegionRemSetIterator; | |
53 class HeapRegion; | |
2152 | 54 class HeapRegionSetBase; |
12080 | 55 class nmethod; |
2152 | 56 |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
57 #define HR_FORMAT "%u:(%s)["PTR_FORMAT","PTR_FORMAT","PTR_FORMAT"]" |
3766 | 58 #define HR_FORMAT_PARAMS(_hr_) \ |
59 (_hr_)->hrs_index(), \ | |
6254
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6027
diff
changeset
|
60 (_hr_)->is_survivor() ? "S" : (_hr_)->is_young() ? "E" : \ |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6027
diff
changeset
|
61 (_hr_)->startsHumongous() ? "HS" : \ |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6027
diff
changeset
|
62 (_hr_)->continuesHumongous() ? "HC" : \ |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6027
diff
changeset
|
63 !(_hr_)->is_empty() ? "O" : "F", \ |
3766 | 64 (_hr_)->bottom(), (_hr_)->top(), (_hr_)->end() |
342 | 65 |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
66 // sentinel value for hrs_index |
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
67 #define G1_NULL_HRS_INDEX ((uint) -1) |
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
68 |
342 | 69 // A dirty card to oop closure for heap regions. It |
70 // knows how to get the G1 heap and how to use the bitmap | |
71 // in the concurrent marker used by G1 to filter remembered | |
72 // sets. | |
73 | |
74 class HeapRegionDCTOC : public ContiguousSpaceDCTOC { | |
75 public: | |
76 // Specification of possible DirtyCardToOopClosure filtering. | |
77 enum FilterKind { | |
78 NoFilterKind, | |
79 IntoCSFilterKind, | |
80 OutOfRegionFilterKind | |
81 }; | |
82 | |
83 protected: | |
84 HeapRegion* _hr; | |
85 FilterKind _fk; | |
86 G1CollectedHeap* _g1; | |
87 | |
88 void walk_mem_region_with_cl(MemRegion mr, | |
89 HeapWord* bottom, HeapWord* top, | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6254
diff
changeset
|
90 ExtendedOopClosure* cl); |
342 | 91 |
92 // We don't specialize this for FilteringClosure; filtering is handled by | |
93 // the "FilterKind" mechanism. But we provide this to avoid a compiler | |
94 // warning. | |
95 void walk_mem_region_with_cl(MemRegion mr, | |
96 HeapWord* bottom, HeapWord* top, | |
97 FilteringClosure* cl) { | |
98 HeapRegionDCTOC::walk_mem_region_with_cl(mr, bottom, top, | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6254
diff
changeset
|
99 (ExtendedOopClosure*)cl); |
342 | 100 } |
101 | |
102 // Get the actual top of the area on which the closure will | |
103 // operate, given where the top is assumed to be (the end of the | |
104 // memory region passed to do_MemRegion) and where the object | |
105 // at the top is assumed to start. For example, an object may | |
106 // start at the top but actually extend past the assumed top, | |
107 // in which case the top becomes the end of the object. | |
108 HeapWord* get_actual_top(HeapWord* top, HeapWord* top_obj) { | |
109 return ContiguousSpaceDCTOC::get_actual_top(top, top_obj); | |
110 } | |
111 | |
112 // Walk the given memory region from bottom to (actual) top | |
113 // looking for objects and applying the oop closure (_cl) to | |
114 // them. The base implementation of this treats the area as | |
115 // blocks, where a block may or may not be an object. Sub- | |
116 // classes should override this to provide more accurate | |
117 // or possibly more efficient walking. | |
118 void walk_mem_region(MemRegion mr, HeapWord* bottom, HeapWord* top) { | |
119 Filtering_DCTOC::walk_mem_region(mr, bottom, top); | |
120 } | |
121 | |
122 public: | |
123 HeapRegionDCTOC(G1CollectedHeap* g1, | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6254
diff
changeset
|
124 HeapRegion* hr, ExtendedOopClosure* cl, |
342 | 125 CardTableModRefBS::PrecisionStyle precision, |
126 FilterKind fk); | |
127 }; | |
128 | |
129 // The complicating factor is that BlockOffsetTable diverged | |
130 // significantly, and we need functionality that is only in the G1 version. | |
131 // So I copied that code, which led to an alternate G1 version of | |
132 // OffsetTableContigSpace. If the two versions of BlockOffsetTable could | |
133 // be reconciled, then G1OffsetTableContigSpace could go away. | |
134 | |
135 // The idea behind time stamps is the following. Doing a save_marks on | |
136 // all regions at every GC pause is time consuming (if I remember | |
137 // well, 10ms or so). So, we would like to do that only for regions | |
138 // that are GC alloc regions. To achieve this, we use time | |
139 // stamps. For every evacuation pause, G1CollectedHeap generates a | |
140 // unique time stamp (essentially a counter that gets | |
141 // incremented). Every time we want to call save_marks on a region, | |
142 // we set the saved_mark_word to top and also copy the current GC | |
143 // time stamp to the time stamp field of the space. Reading the | |
144 // saved_mark_word involves checking the time stamp of the | |
145 // region. If it is the same as the current GC time stamp, then we | |
146 // can safely read the saved_mark_word field, as it is valid. If the | |
147 // time stamp of the region is not the same as the current GC time | |
148 // stamp, then we instead read top, as the saved_mark_word field is | |
149 // invalid. Time stamps (on the regions and also on the | |
150 // G1CollectedHeap) are reset at every cleanup (we iterate over | |
151 // the regions anyway) and at the end of a Full GC. The current scheme | |
152 // that uses sequential unsigned ints will fail only if we have 4b | |
153 // evacuation pauses between two cleanups, which is _highly_ unlikely. | |
154 | |
155 class G1OffsetTableContigSpace: public ContiguousSpace { | |
156 friend class VMStructs; | |
157 protected: | |
158 G1BlockOffsetArrayContigSpace _offsets; | |
159 Mutex _par_alloc_lock; | |
160 volatile unsigned _gc_time_stamp; | |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2361
diff
changeset
|
161 // When we need to retire an allocation region, while other threads |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2361
diff
changeset
|
162 // are also concurrently trying to allocate into it, we typically |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2361
diff
changeset
|
163 // allocate a dummy object at the end of the region to ensure that |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2361
diff
changeset
|
164 // no more allocations can take place in it. However, sometimes we |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2361
diff
changeset
|
165 // want to know where the end of the last "real" object we allocated |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2361
diff
changeset
|
166 // into the region was and this is what this keeps track. |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2361
diff
changeset
|
167 HeapWord* _pre_dummy_top; |
342 | 168 |
169 public: | |
170 G1OffsetTableContigSpace(G1BlockOffsetSharedArray* sharedOffsetArray, | |
6754
8fbf05030e24
7016955: G1: remove the is_zeroed parameter from the HeapRegion constructor
johnc
parents:
6725
diff
changeset
|
171 MemRegion mr); |
342 | 172 |
173 void set_bottom(HeapWord* value); | |
174 void set_end(HeapWord* value); | |
175 | |
176 virtual HeapWord* saved_mark_word() const; | |
177 virtual void set_saved_mark(); | |
178 void reset_gc_time_stamp() { _gc_time_stamp = 0; } | |
6254
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6027
diff
changeset
|
179 unsigned get_gc_time_stamp() { return _gc_time_stamp; } |
342 | 180 |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2361
diff
changeset
|
181 // See the comment above in the declaration of _pre_dummy_top for an |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2361
diff
changeset
|
182 // explanation of what it is. |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2361
diff
changeset
|
183 void set_pre_dummy_top(HeapWord* pre_dummy_top) { |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2361
diff
changeset
|
184 assert(is_in(pre_dummy_top) && pre_dummy_top <= top(), "pre-condition"); |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2361
diff
changeset
|
185 _pre_dummy_top = pre_dummy_top; |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2361
diff
changeset
|
186 } |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2361
diff
changeset
|
187 HeapWord* pre_dummy_top() { |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2361
diff
changeset
|
188 return (_pre_dummy_top == NULL) ? top() : _pre_dummy_top; |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2361
diff
changeset
|
189 } |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2361
diff
changeset
|
190 void reset_pre_dummy_top() { _pre_dummy_top = NULL; } |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2361
diff
changeset
|
191 |
356 | 192 virtual void clear(bool mangle_space); |
342 | 193 |
194 HeapWord* block_start(const void* p); | |
195 HeapWord* block_start_const(const void* p) const; | |
196 | |
197 // Add offset table update. | |
198 virtual HeapWord* allocate(size_t word_size); | |
199 HeapWord* par_allocate(size_t word_size); | |
200 | |
201 // MarkSweep support phase3 | |
202 virtual HeapWord* initialize_threshold(); | |
203 virtual HeapWord* cross_threshold(HeapWord* start, HeapWord* end); | |
204 | |
205 virtual void print() const; | |
2133
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
206 |
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
207 void reset_bot() { |
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
208 _offsets.zero_bottom_entry(); |
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
209 _offsets.initialize_threshold(); |
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
210 } |
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
211 |
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
212 void update_bot_for_object(HeapWord* start, size_t word_size) { |
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
213 _offsets.alloc_block(start, word_size); |
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
214 } |
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
215 |
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
216 void print_bot_on(outputStream* out) { |
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
217 _offsets.print_on(out); |
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
218 } |
342 | 219 }; |
220 | |
221 class HeapRegion: public G1OffsetTableContigSpace { | |
222 friend class VMStructs; | |
223 private: | |
224 | |
355 | 225 enum HumongousType { |
226 NotHumongous = 0, | |
227 StartsHumongous, | |
228 ContinuesHumongous | |
229 }; | |
230 | |
342 | 231 // Requires that the region "mr" be dense with objects, and begin and end |
232 // with an object. | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6254
diff
changeset
|
233 void oops_in_mr_iterate(MemRegion mr, ExtendedOopClosure* cl); |
342 | 234 |
235 // The remembered set for this region. | |
236 // (Might want to make this "inline" later, to avoid some alloc failure | |
237 // issues.) | |
238 HeapRegionRemSet* _rem_set; | |
239 | |
240 G1BlockOffsetArrayContigSpace* offsets() { return &_offsets; } | |
241 | |
242 protected: | |
3766 | 243 // The index of this region in the heap region sequence. |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
244 uint _hrs_index; |
342 | 245 |
355 | 246 HumongousType _humongous_type; |
342 | 247 // For a humongous region, region in which it starts. |
248 HeapRegion* _humongous_start_region; | |
249 // For the start region of a humongous sequence, it's original end(). | |
250 HeapWord* _orig_end; | |
251 | |
252 // True iff the region is in current collection_set. | |
253 bool _in_collection_set; | |
254 | |
255 // True iff an attempt to evacuate an object in the region failed. | |
256 bool _evacuation_failed; | |
257 | |
258 // A heap region may be a member one of a number of special subsets, each | |
259 // represented as linked lists through the field below. Currently, these | |
260 // sets include: | |
261 // The collection set. | |
262 // The set of allocation regions used in a collection pause. | |
263 // Spaces that may contain gray objects. | |
264 HeapRegion* _next_in_special_set; | |
265 | |
266 // next region in the young "generation" region set | |
267 HeapRegion* _next_young_region; | |
268 | |
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
677
diff
changeset
|
269 // Next region whose cards need cleaning |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
677
diff
changeset
|
270 HeapRegion* _next_dirty_cards_region; |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
677
diff
changeset
|
271 |
2152 | 272 // Fields used by the HeapRegionSetBase class and subclasses. |
273 HeapRegion* _next; | |
274 #ifdef ASSERT | |
275 HeapRegionSetBase* _containing_set; | |
276 #endif // ASSERT | |
277 bool _pending_removal; | |
278 | |
342 | 279 // For parallel heapRegion traversal. |
280 jint _claimed; | |
281 | |
282 // We use concurrent marking to determine the amount of live data | |
283 // in each heap region. | |
284 size_t _prev_marked_bytes; // Bytes known to be live via last completed marking. | |
285 size_t _next_marked_bytes; // Bytes known to be live via in-progress marking. | |
286 | |
6011 | 287 // The calculated GC efficiency of the region. |
342 | 288 double _gc_efficiency; |
289 | |
290 enum YoungType { | |
291 NotYoung, // a region is not young | |
292 Young, // a region is young | |
3766 | 293 Survivor // a region is young and it contains survivors |
342 | 294 }; |
295 | |
1666
5cbac8938c4c
6956639: G1: assert(cached_ptr != card_ptr) failed: shouldn't be, concurrentG1Refine.cpp:307
johnc
parents:
1552
diff
changeset
|
296 volatile YoungType _young_type; |
342 | 297 int _young_index_in_cset; |
298 SurvRateGroup* _surv_rate_group; | |
299 int _age_index; | |
300 | |
301 // The start of the unmarked area. The unmarked area extends from this | |
302 // word until the top and/or end of the region, and is the part | |
303 // of the region for which no marking was done, i.e. objects may | |
304 // have been allocated in this part since the last mark phase. | |
305 // "prev" is the top at the start of the last completed marking. | |
306 // "next" is the top at the start of the in-progress marking (if any.) | |
307 HeapWord* _prev_top_at_mark_start; | |
308 HeapWord* _next_top_at_mark_start; | |
309 // If a collection pause is in progress, this is the top at the start | |
310 // of that pause. | |
311 | |
312 void init_top_at_mark_start() { | |
313 assert(_prev_marked_bytes == 0 && | |
314 _next_marked_bytes == 0, | |
315 "Must be called after zero_marked_bytes."); | |
316 HeapWord* bot = bottom(); | |
317 _prev_top_at_mark_start = bot; | |
318 _next_top_at_mark_start = bot; | |
319 } | |
320 | |
321 void set_young_type(YoungType new_type) { | |
322 //assert(_young_type != new_type, "setting the same type" ); | |
323 // TODO: add more assertions here | |
324 _young_type = new_type; | |
325 } | |
326 | |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1021
diff
changeset
|
327 // Cached attributes used in the collection set policy information |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1021
diff
changeset
|
328 |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1021
diff
changeset
|
329 // The RSet length that was added to the total value |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1021
diff
changeset
|
330 // for the collection set. |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1021
diff
changeset
|
331 size_t _recorded_rs_length; |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1021
diff
changeset
|
332 |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1021
diff
changeset
|
333 // The predicted elapsed time that was added to total value |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1021
diff
changeset
|
334 // for the collection set. |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1021
diff
changeset
|
335 double _predicted_elapsed_time_ms; |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1021
diff
changeset
|
336 |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1021
diff
changeset
|
337 // The predicted number of bytes to copy that was added to |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1021
diff
changeset
|
338 // the total value for the collection set. |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1021
diff
changeset
|
339 size_t _predicted_bytes_to_copy; |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1021
diff
changeset
|
340 |
342 | 341 public: |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
342 HeapRegion(uint hrs_index, |
3766 | 343 G1BlockOffsetSharedArray* sharedOffsetArray, |
6754
8fbf05030e24
7016955: G1: remove the is_zeroed parameter from the HeapRegion constructor
johnc
parents:
6725
diff
changeset
|
344 MemRegion mr); |
342 | 345 |
3986
65a8ff39a6da
7095194: G1: HeapRegion::GrainBytes, GrainWords, and CardsPerRegion should be size_t
johnc
parents:
3980
diff
changeset
|
346 static int LogOfHRGrainBytes; |
65a8ff39a6da
7095194: G1: HeapRegion::GrainBytes, GrainWords, and CardsPerRegion should be size_t
johnc
parents:
3980
diff
changeset
|
347 static int LogOfHRGrainWords; |
65a8ff39a6da
7095194: G1: HeapRegion::GrainBytes, GrainWords, and CardsPerRegion should be size_t
johnc
parents:
3980
diff
changeset
|
348 |
65a8ff39a6da
7095194: G1: HeapRegion::GrainBytes, GrainWords, and CardsPerRegion should be size_t
johnc
parents:
3980
diff
changeset
|
349 static size_t GrainBytes; |
65a8ff39a6da
7095194: G1: HeapRegion::GrainBytes, GrainWords, and CardsPerRegion should be size_t
johnc
parents:
3980
diff
changeset
|
350 static size_t GrainWords; |
65a8ff39a6da
7095194: G1: HeapRegion::GrainBytes, GrainWords, and CardsPerRegion should be size_t
johnc
parents:
3980
diff
changeset
|
351 static size_t CardsPerRegion; |
942
2c79770d1f6e
6819085: G1: use larger and/or user settable region size
tonyp
parents:
811
diff
changeset
|
352 |
3980
8229bd737950
7075646: G1: fix inconsistencies in the monitoring data
tonyp
parents:
3979
diff
changeset
|
353 static size_t align_up_to_region_byte_size(size_t sz) { |
8229bd737950
7075646: G1: fix inconsistencies in the monitoring data
tonyp
parents:
3979
diff
changeset
|
354 return (sz + (size_t) GrainBytes - 1) & |
8229bd737950
7075646: G1: fix inconsistencies in the monitoring data
tonyp
parents:
3979
diff
changeset
|
355 ~((1 << (size_t) LogOfHRGrainBytes) - 1); |
8229bd737950
7075646: G1: fix inconsistencies in the monitoring data
tonyp
parents:
3979
diff
changeset
|
356 } |
8229bd737950
7075646: G1: fix inconsistencies in the monitoring data
tonyp
parents:
3979
diff
changeset
|
357 |
12233
40136aa2cdb1
8010722: assert: failed: heap size is too big for compressed oops
tschatzl
parents:
12178
diff
changeset
|
358 static size_t max_region_size(); |
40136aa2cdb1
8010722: assert: failed: heap size is too big for compressed oops
tschatzl
parents:
12178
diff
changeset
|
359 |
942
2c79770d1f6e
6819085: G1: use larger and/or user settable region size
tonyp
parents:
811
diff
changeset
|
360 // It sets up the heap region size (GrainBytes / GrainWords), as |
2c79770d1f6e
6819085: G1: use larger and/or user settable region size
tonyp
parents:
811
diff
changeset
|
361 // well as other related fields that are based on the heap region |
2c79770d1f6e
6819085: G1: use larger and/or user settable region size
tonyp
parents:
811
diff
changeset
|
362 // size (LogOfHRGrainBytes / LogOfHRGrainWords / |
2c79770d1f6e
6819085: G1: use larger and/or user settable region size
tonyp
parents:
811
diff
changeset
|
363 // CardsPerRegion). All those fields are considered constant |
2c79770d1f6e
6819085: G1: use larger and/or user settable region size
tonyp
parents:
811
diff
changeset
|
364 // throughout the JVM's execution, therefore they should only be set |
2c79770d1f6e
6819085: G1: use larger and/or user settable region size
tonyp
parents:
811
diff
changeset
|
365 // up once during initialization time. |
12178
84683e78e713
8019902: G1: Use the average heap size rather than the minimum heap size to calculate the region size
brutisso
parents:
12080
diff
changeset
|
366 static void setup_heap_region_size(size_t initial_heap_size, size_t max_heap_size); |
342 | 367 |
355 | 368 enum ClaimValues { |
4097
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4093
diff
changeset
|
369 InitialClaimValue = 0, |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4093
diff
changeset
|
370 FinalCountClaimValue = 1, |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4093
diff
changeset
|
371 NoteEndClaimValue = 2, |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4093
diff
changeset
|
372 ScrubRemSetClaimValue = 3, |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4093
diff
changeset
|
373 ParVerifyClaimValue = 4, |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4093
diff
changeset
|
374 RebuildRSClaimValue = 5, |
5988
2a0172480595
7127697: G1: remove dead code after recent concurrent mark changes
tonyp
parents:
4912
diff
changeset
|
375 ParEvacFailureClaimValue = 6, |
2a0172480595
7127697: G1: remove dead code after recent concurrent mark changes
tonyp
parents:
4912
diff
changeset
|
376 AggregateCountClaimValue = 7, |
12080 | 377 VerifyCountClaimValue = 8, |
378 ParMarkRootClaimValue = 9 | |
355 | 379 }; |
380 | |
2134
b158bed62ef5
6994297: G1: do first-level slow-path allocations with a CAS
tonyp
parents:
2133
diff
changeset
|
381 inline HeapWord* par_allocate_no_bot_updates(size_t word_size) { |
b158bed62ef5
6994297: G1: do first-level slow-path allocations with a CAS
tonyp
parents:
2133
diff
changeset
|
382 assert(is_young(), "we can only skip BOT updates on young regions"); |
b158bed62ef5
6994297: G1: do first-level slow-path allocations with a CAS
tonyp
parents:
2133
diff
changeset
|
383 return ContiguousSpace::par_allocate(word_size); |
b158bed62ef5
6994297: G1: do first-level slow-path allocations with a CAS
tonyp
parents:
2133
diff
changeset
|
384 } |
b158bed62ef5
6994297: G1: do first-level slow-path allocations with a CAS
tonyp
parents:
2133
diff
changeset
|
385 inline HeapWord* allocate_no_bot_updates(size_t word_size) { |
b158bed62ef5
6994297: G1: do first-level slow-path allocations with a CAS
tonyp
parents:
2133
diff
changeset
|
386 assert(is_young(), "we can only skip BOT updates on young regions"); |
b158bed62ef5
6994297: G1: do first-level slow-path allocations with a CAS
tonyp
parents:
2133
diff
changeset
|
387 return ContiguousSpace::allocate(word_size); |
b158bed62ef5
6994297: G1: do first-level slow-path allocations with a CAS
tonyp
parents:
2133
diff
changeset
|
388 } |
b158bed62ef5
6994297: G1: do first-level slow-path allocations with a CAS
tonyp
parents:
2133
diff
changeset
|
389 |
342 | 390 // If this region is a member of a HeapRegionSeq, the index in that |
391 // sequence, otherwise -1. | |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
392 uint hrs_index() const { return _hrs_index; } |
342 | 393 |
394 // The number of bytes marked live in the region in the last marking phase. | |
395 size_t marked_bytes() { return _prev_marked_bytes; } | |
2435
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2433
diff
changeset
|
396 size_t live_bytes() { |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2433
diff
changeset
|
397 return (top() - prev_top_at_mark_start()) * HeapWordSize + marked_bytes(); |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2433
diff
changeset
|
398 } |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2433
diff
changeset
|
399 |
342 | 400 // The number of bytes counted in the next marking. |
401 size_t next_marked_bytes() { return _next_marked_bytes; } | |
402 // The number of bytes live wrt the next marking. | |
403 size_t next_live_bytes() { | |
2435
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2433
diff
changeset
|
404 return |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2433
diff
changeset
|
405 (top() - next_top_at_mark_start()) * HeapWordSize + next_marked_bytes(); |
342 | 406 } |
407 | |
408 // A lower bound on the amount of garbage bytes in the region. | |
409 size_t garbage_bytes() { | |
410 size_t used_at_mark_start_bytes = | |
411 (prev_top_at_mark_start() - bottom()) * HeapWordSize; | |
412 assert(used_at_mark_start_bytes >= marked_bytes(), | |
413 "Can't mark more than we have."); | |
414 return used_at_mark_start_bytes - marked_bytes(); | |
415 } | |
416 | |
4912
a9647476d1a4
7132029: G1: mixed GC phase lasts for longer than it should
tonyp
parents:
4836
diff
changeset
|
417 // Return the amount of bytes we'll reclaim if we collect this |
a9647476d1a4
7132029: G1: mixed GC phase lasts for longer than it should
tonyp
parents:
4836
diff
changeset
|
418 // region. This includes not only the known garbage bytes in the |
a9647476d1a4
7132029: G1: mixed GC phase lasts for longer than it should
tonyp
parents:
4836
diff
changeset
|
419 // region but also any unallocated space in it, i.e., [top, end), |
a9647476d1a4
7132029: G1: mixed GC phase lasts for longer than it should
tonyp
parents:
4836
diff
changeset
|
420 // since it will also be reclaimed if we collect the region. |
a9647476d1a4
7132029: G1: mixed GC phase lasts for longer than it should
tonyp
parents:
4836
diff
changeset
|
421 size_t reclaimable_bytes() { |
a9647476d1a4
7132029: G1: mixed GC phase lasts for longer than it should
tonyp
parents:
4836
diff
changeset
|
422 size_t known_live_bytes = live_bytes(); |
a9647476d1a4
7132029: G1: mixed GC phase lasts for longer than it should
tonyp
parents:
4836
diff
changeset
|
423 assert(known_live_bytes <= capacity(), "sanity"); |
a9647476d1a4
7132029: G1: mixed GC phase lasts for longer than it should
tonyp
parents:
4836
diff
changeset
|
424 return capacity() - known_live_bytes; |
a9647476d1a4
7132029: G1: mixed GC phase lasts for longer than it should
tonyp
parents:
4836
diff
changeset
|
425 } |
a9647476d1a4
7132029: G1: mixed GC phase lasts for longer than it should
tonyp
parents:
4836
diff
changeset
|
426 |
342 | 427 // An upper bound on the number of live bytes in the region. |
428 size_t max_live_bytes() { return used() - garbage_bytes(); } | |
429 | |
430 void add_to_marked_bytes(size_t incr_bytes) { | |
431 _next_marked_bytes = _next_marked_bytes + incr_bytes; | |
4093
6071e0581859
7111795: G1: Various cleanups identified during walk through of changes for 6484965
johnc
parents:
4023
diff
changeset
|
432 assert(_next_marked_bytes <= used(), "invariant" ); |
342 | 433 } |
434 | |
435 void zero_marked_bytes() { | |
436 _prev_marked_bytes = _next_marked_bytes = 0; | |
437 } | |
438 | |
355 | 439 bool isHumongous() const { return _humongous_type != NotHumongous; } |
440 bool startsHumongous() const { return _humongous_type == StartsHumongous; } | |
441 bool continuesHumongous() const { return _humongous_type == ContinuesHumongous; } | |
342 | 442 // For a humongous region, region in which it starts. |
443 HeapRegion* humongous_start_region() const { | |
444 return _humongous_start_region; | |
445 } | |
446 | |
6254
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6027
diff
changeset
|
447 // Return the number of distinct regions that are covered by this region: |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6027
diff
changeset
|
448 // 1 if the region is not humongous, >= 1 if the region is humongous. |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6027
diff
changeset
|
449 uint region_num() const { |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6027
diff
changeset
|
450 if (!isHumongous()) { |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6027
diff
changeset
|
451 return 1U; |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6027
diff
changeset
|
452 } else { |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6027
diff
changeset
|
453 assert(startsHumongous(), "doesn't make sense on HC regions"); |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6027
diff
changeset
|
454 assert(capacity() % HeapRegion::GrainBytes == 0, "sanity"); |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6027
diff
changeset
|
455 return (uint) (capacity() >> HeapRegion::LogOfHRGrainBytes); |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6027
diff
changeset
|
456 } |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6027
diff
changeset
|
457 } |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6027
diff
changeset
|
458 |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6027
diff
changeset
|
459 // Return the index + 1 of the last HC regions that's associated |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6027
diff
changeset
|
460 // with this HS region. |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6027
diff
changeset
|
461 uint last_hc_index() const { |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6027
diff
changeset
|
462 assert(startsHumongous(), "don't call this otherwise"); |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6027
diff
changeset
|
463 return hrs_index() + region_num(); |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6027
diff
changeset
|
464 } |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6027
diff
changeset
|
465 |
4020
5e5d4821bf07
7097516: G1: assert(0<= from_card && from_card<HeapRegion::CardsPerRegion) failed: Must be in range.
brutisso
parents:
3986
diff
changeset
|
466 // Same as Space::is_in_reserved, but will use the original size of the region. |
5e5d4821bf07
7097516: G1: assert(0<= from_card && from_card<HeapRegion::CardsPerRegion) failed: Must be in range.
brutisso
parents:
3986
diff
changeset
|
467 // The original size is different only for start humongous regions. They get |
5e5d4821bf07
7097516: G1: assert(0<= from_card && from_card<HeapRegion::CardsPerRegion) failed: Must be in range.
brutisso
parents:
3986
diff
changeset
|
468 // their _end set up to be the end of the last continues region of the |
5e5d4821bf07
7097516: G1: assert(0<= from_card && from_card<HeapRegion::CardsPerRegion) failed: Must be in range.
brutisso
parents:
3986
diff
changeset
|
469 // corresponding humongous object. |
5e5d4821bf07
7097516: G1: assert(0<= from_card && from_card<HeapRegion::CardsPerRegion) failed: Must be in range.
brutisso
parents:
3986
diff
changeset
|
470 bool is_in_reserved_raw(const void* p) const { |
5e5d4821bf07
7097516: G1: assert(0<= from_card && from_card<HeapRegion::CardsPerRegion) failed: Must be in range.
brutisso
parents:
3986
diff
changeset
|
471 return _bottom <= p && p < _orig_end; |
5e5d4821bf07
7097516: G1: assert(0<= from_card && from_card<HeapRegion::CardsPerRegion) failed: Must be in range.
brutisso
parents:
3986
diff
changeset
|
472 } |
5e5d4821bf07
7097516: G1: assert(0<= from_card && from_card<HeapRegion::CardsPerRegion) failed: Must be in range.
brutisso
parents:
3986
diff
changeset
|
473 |
2133
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
474 // Makes the current region be a "starts humongous" region, i.e., |
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
475 // the first region in a series of one or more contiguous regions |
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
476 // that will contain a single "humongous" object. The two parameters |
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
477 // are as follows: |
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
478 // |
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
479 // new_top : The new value of the top field of this region which |
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
480 // points to the end of the humongous object that's being |
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
481 // allocated. If there is more than one region in the series, top |
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
482 // will lie beyond this region's original end field and on the last |
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
483 // region in the series. |
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
484 // |
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
485 // new_end : The new value of the end field of this region which |
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
486 // points to the end of the last region in the series. If there is |
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
487 // one region in the series (namely: this one) end will be the same |
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
488 // as the original end of this region. |
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
489 // |
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
490 // Updating top and end as described above makes this region look as |
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
491 // if it spans the entire space taken up by all the regions in the |
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
492 // series and an single allocation moved its top to new_top. This |
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
493 // ensures that the space (capacity / allocated) taken up by all |
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
494 // humongous regions can be calculated by just looking at the |
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
495 // "starts humongous" regions and by ignoring the "continues |
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
496 // humongous" regions. |
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
497 void set_startsHumongous(HeapWord* new_top, HeapWord* new_end); |
342 | 498 |
2133
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
499 // Makes the current region be a "continues humongous' |
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
500 // region. first_hr is the "start humongous" region of the series |
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
501 // which this region will be part of. |
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
502 void set_continuesHumongous(HeapRegion* first_hr); |
342 | 503 |
2152 | 504 // Unsets the humongous-related fields on the region. |
505 void set_notHumongous(); | |
506 | |
342 | 507 // If the region has a remembered set, return a pointer to it. |
508 HeapRegionRemSet* rem_set() const { | |
509 return _rem_set; | |
510 } | |
511 | |
512 // True iff the region is in current collection_set. | |
513 bool in_collection_set() const { | |
514 return _in_collection_set; | |
515 } | |
516 void set_in_collection_set(bool b) { | |
517 _in_collection_set = b; | |
518 } | |
519 HeapRegion* next_in_collection_set() { | |
520 assert(in_collection_set(), "should only invoke on member of CS."); | |
521 assert(_next_in_special_set == NULL || | |
522 _next_in_special_set->in_collection_set(), | |
523 "Malformed CS."); | |
524 return _next_in_special_set; | |
525 } | |
526 void set_next_in_collection_set(HeapRegion* r) { | |
527 assert(in_collection_set(), "should only invoke on member of CS."); | |
528 assert(r == NULL || r->in_collection_set(), "Malformed CS."); | |
529 _next_in_special_set = r; | |
530 } | |
531 | |
2152 | 532 // Methods used by the HeapRegionSetBase class and subclasses. |
342 | 533 |
2152 | 534 // Getter and setter for the next field used to link regions into |
535 // linked lists. | |
536 HeapRegion* next() { return _next; } | |
537 | |
538 void set_next(HeapRegion* next) { _next = next; } | |
342 | 539 |
2152 | 540 // Every region added to a set is tagged with a reference to that |
541 // set. This is used for doing consistency checking to make sure that | |
542 // the contents of a set are as they should be and it's only | |
543 // available in non-product builds. | |
544 #ifdef ASSERT | |
545 void set_containing_set(HeapRegionSetBase* containing_set) { | |
546 assert((containing_set == NULL && _containing_set != NULL) || | |
547 (containing_set != NULL && _containing_set == NULL), | |
548 err_msg("containing_set: "PTR_FORMAT" " | |
549 "_containing_set: "PTR_FORMAT, | |
550 containing_set, _containing_set)); | |
551 | |
552 _containing_set = containing_set; | |
2361 | 553 } |
342 | 554 |
2152 | 555 HeapRegionSetBase* containing_set() { return _containing_set; } |
556 #else // ASSERT | |
557 void set_containing_set(HeapRegionSetBase* containing_set) { } | |
342 | 558 |
2361 | 559 // containing_set() is only used in asserts so there's no reason |
2152 | 560 // to provide a dummy version of it. |
561 #endif // ASSERT | |
342 | 562 |
2152 | 563 // If we want to remove regions from a list in bulk we can simply tag |
564 // them with the pending_removal tag and call the | |
565 // remove_all_pending() method on the list. | |
342 | 566 |
2152 | 567 bool pending_removal() { return _pending_removal; } |
568 | |
569 void set_pending_removal(bool pending_removal) { | |
2361 | 570 if (pending_removal) { |
571 assert(!_pending_removal && containing_set() != NULL, | |
572 "can only set pending removal to true if it's false and " | |
573 "the region belongs to a region set"); | |
574 } else { | |
575 assert( _pending_removal && containing_set() == NULL, | |
576 "can only set pending removal to false if it's true and " | |
577 "the region does not belong to a region set"); | |
578 } | |
2152 | 579 |
580 _pending_removal = pending_removal; | |
342 | 581 } |
582 | |
583 HeapRegion* get_next_young_region() { return _next_young_region; } | |
584 void set_next_young_region(HeapRegion* hr) { | |
585 _next_young_region = hr; | |
586 } | |
587 | |
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
677
diff
changeset
|
588 HeapRegion* get_next_dirty_cards_region() const { return _next_dirty_cards_region; } |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
677
diff
changeset
|
589 HeapRegion** next_dirty_cards_region_addr() { return &_next_dirty_cards_region; } |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
677
diff
changeset
|
590 void set_next_dirty_cards_region(HeapRegion* hr) { _next_dirty_cards_region = hr; } |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
677
diff
changeset
|
591 bool is_on_dirty_cards_region_list() const { return get_next_dirty_cards_region() != NULL; } |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
677
diff
changeset
|
592 |
3766 | 593 HeapWord* orig_end() { return _orig_end; } |
594 | |
342 | 595 // Allows logical separation between objects allocated before and after. |
596 void save_marks(); | |
597 | |
598 // Reset HR stuff to default values. | |
599 void hr_clear(bool par, bool clear_space); | |
3317
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
2435
diff
changeset
|
600 void par_clear(); |
342 | 601 |
602 // Get the start of the unmarked area in this region. | |
603 HeapWord* prev_top_at_mark_start() const { return _prev_top_at_mark_start; } | |
604 HeapWord* next_top_at_mark_start() const { return _next_top_at_mark_start; } | |
605 | |
606 // Apply "cl->do_oop" to (the addresses of) all reference fields in objects | |
607 // allocated in the current region before the last call to "save_mark". | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6254
diff
changeset
|
608 void oop_before_save_marks_iterate(ExtendedOopClosure* cl); |
342 | 609 |
610 // Note the start or end of marking. This tells the heap region | |
611 // that the collector is about to start or has finished (concurrently) | |
612 // marking the heap. | |
613 | |
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
614 // Notify the region that concurrent marking is starting. Initialize |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
615 // all fields related to the next marking info. |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
616 inline void note_start_of_marking(); |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
617 |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
618 // Notify the region that concurrent marking has finished. Copy the |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
619 // (now finalized) next marking info fields into the prev marking |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
620 // info fields. |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
621 inline void note_end_of_marking(); |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
622 |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
623 // Notify the region that it will be used as to-space during a GC |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
624 // and we are about to start copying objects into it. |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
625 inline void note_start_of_copying(bool during_initial_mark); |
342 | 626 |
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
627 // Notify the region that it ceases being to-space during a GC and |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
628 // we will not copy objects into it any more. |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
629 inline void note_end_of_copying(bool during_initial_mark); |
342 | 630 |
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
631 // Notify the region that we are about to start processing |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
632 // self-forwarded objects during evac failure handling. |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
633 void note_self_forwarding_removal_start(bool during_initial_mark, |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
634 bool during_conc_mark); |
342 | 635 |
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
636 // Notify the region that we have finished processing self-forwarded |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
637 // objects during evac failure handling. |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
638 void note_self_forwarding_removal_end(bool during_initial_mark, |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
639 bool during_conc_mark, |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
640 size_t marked_bytes); |
342 | 641 |
642 // Returns "false" iff no object in the region was allocated when the | |
643 // last mark phase ended. | |
644 bool is_marked() { return _prev_top_at_mark_start != bottom(); } | |
645 | |
646 void reset_during_compaction() { | |
6254
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6027
diff
changeset
|
647 assert(isHumongous() && startsHumongous(), |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6027
diff
changeset
|
648 "should only be called for starts humongous regions"); |
342 | 649 |
650 zero_marked_bytes(); | |
651 init_top_at_mark_start(); | |
652 } | |
653 | |
654 void calc_gc_efficiency(void); | |
655 double gc_efficiency() { return _gc_efficiency;} | |
656 | |
657 bool is_young() const { return _young_type != NotYoung; } | |
658 bool is_survivor() const { return _young_type == Survivor; } | |
659 | |
660 int young_index_in_cset() const { return _young_index_in_cset; } | |
661 void set_young_index_in_cset(int index) { | |
662 assert( (index == -1) || is_young(), "pre-condition" ); | |
663 _young_index_in_cset = index; | |
664 } | |
665 | |
666 int age_in_surv_rate_group() { | |
667 assert( _surv_rate_group != NULL, "pre-condition" ); | |
668 assert( _age_index > -1, "pre-condition" ); | |
669 return _surv_rate_group->age_in_group(_age_index); | |
670 } | |
671 | |
672 void record_surv_words_in_group(size_t words_survived) { | |
673 assert( _surv_rate_group != NULL, "pre-condition" ); | |
674 assert( _age_index > -1, "pre-condition" ); | |
675 int age_in_group = age_in_surv_rate_group(); | |
676 _surv_rate_group->record_surviving_words(age_in_group, words_survived); | |
677 } | |
678 | |
679 int age_in_surv_rate_group_cond() { | |
680 if (_surv_rate_group != NULL) | |
681 return age_in_surv_rate_group(); | |
682 else | |
683 return -1; | |
684 } | |
685 | |
686 SurvRateGroup* surv_rate_group() { | |
687 return _surv_rate_group; | |
688 } | |
689 | |
690 void install_surv_rate_group(SurvRateGroup* surv_rate_group) { | |
691 assert( surv_rate_group != NULL, "pre-condition" ); | |
692 assert( _surv_rate_group == NULL, "pre-condition" ); | |
693 assert( is_young(), "pre-condition" ); | |
694 | |
695 _surv_rate_group = surv_rate_group; | |
696 _age_index = surv_rate_group->next_age_index(); | |
697 } | |
698 | |
699 void uninstall_surv_rate_group() { | |
700 if (_surv_rate_group != NULL) { | |
701 assert( _age_index > -1, "pre-condition" ); | |
702 assert( is_young(), "pre-condition" ); | |
703 | |
704 _surv_rate_group = NULL; | |
705 _age_index = -1; | |
706 } else { | |
707 assert( _age_index == -1, "pre-condition" ); | |
708 } | |
709 } | |
710 | |
711 void set_young() { set_young_type(Young); } | |
712 | |
713 void set_survivor() { set_young_type(Survivor); } | |
714 | |
715 void set_not_young() { set_young_type(NotYoung); } | |
716 | |
717 // Determine if an object has been allocated since the last | |
718 // mark performed by the collector. This returns true iff the object | |
719 // is within the unmarked area of the region. | |
720 bool obj_allocated_since_prev_marking(oop obj) const { | |
721 return (HeapWord *) obj >= prev_top_at_mark_start(); | |
722 } | |
723 bool obj_allocated_since_next_marking(oop obj) const { | |
724 return (HeapWord *) obj >= next_top_at_mark_start(); | |
725 } | |
726 | |
727 // For parallel heapRegion traversal. | |
728 bool claimHeapRegion(int claimValue); | |
729 jint claim_value() { return _claimed; } | |
730 // Use this carefully: only when you're sure no one is claiming... | |
731 void set_claim_value(int claimValue) { _claimed = claimValue; } | |
732 | |
733 // Returns the "evacuation_failed" property of the region. | |
734 bool evacuation_failed() { return _evacuation_failed; } | |
735 | |
736 // Sets the "evacuation_failed" property of the region. | |
737 void set_evacuation_failed(bool b) { | |
738 _evacuation_failed = b; | |
739 | |
740 if (b) { | |
741 _next_marked_bytes = 0; | |
742 } | |
743 } | |
744 | |
745 // Requires that "mr" be entirely within the region. | |
746 // Apply "cl->do_object" to all objects that intersect with "mr". | |
747 // If the iteration encounters an unparseable portion of the region, | |
748 // or if "cl->abort()" is true after a closure application, | |
749 // terminate the iteration and return the address of the start of the | |
750 // subregion that isn't done. (The two can be distinguished by querying | |
751 // "cl->abort()".) Return of "NULL" indicates that the iteration | |
752 // completed. | |
753 HeapWord* | |
754 object_iterate_mem_careful(MemRegion mr, ObjectClosure* cl); | |
755 | |
3317
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
2435
diff
changeset
|
756 // filter_young: if true and the region is a young region then we |
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
2435
diff
changeset
|
757 // skip the iteration. |
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
2435
diff
changeset
|
758 // card_ptr: if not NULL, and we decide that the card is not young |
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
2435
diff
changeset
|
759 // and we iterate over it, we'll clean the card before we start the |
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
2435
diff
changeset
|
760 // iteration. |
342 | 761 HeapWord* |
762 oops_on_card_seq_iterate_careful(MemRegion mr, | |
1666
5cbac8938c4c
6956639: G1: assert(cached_ptr != card_ptr) failed: shouldn't be, concurrentG1Refine.cpp:307
johnc
parents:
1552
diff
changeset
|
763 FilterOutOfRegionClosure* cl, |
3317
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
2435
diff
changeset
|
764 bool filter_young, |
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
2435
diff
changeset
|
765 jbyte* card_ptr); |
342 | 766 |
767 // A version of block start that is guaranteed to find *some* block | |
768 // boundary at or before "p", but does not object iteration, and may | |
769 // therefore be used safely when the heap is unparseable. | |
770 HeapWord* block_start_careful(const void* p) const { | |
771 return _offsets.block_start_careful(p); | |
772 } | |
773 | |
774 // Requires that "addr" is within the region. Returns the start of the | |
775 // first ("careful") block that starts at or after "addr", or else the | |
776 // "end" of the region if there is no such block. | |
777 HeapWord* next_block_start_careful(HeapWord* addr); | |
778 | |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1021
diff
changeset
|
779 size_t recorded_rs_length() const { return _recorded_rs_length; } |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1021
diff
changeset
|
780 double predicted_elapsed_time_ms() const { return _predicted_elapsed_time_ms; } |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1021
diff
changeset
|
781 size_t predicted_bytes_to_copy() const { return _predicted_bytes_to_copy; } |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1021
diff
changeset
|
782 |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1021
diff
changeset
|
783 void set_recorded_rs_length(size_t rs_length) { |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1021
diff
changeset
|
784 _recorded_rs_length = rs_length; |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1021
diff
changeset
|
785 } |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1021
diff
changeset
|
786 |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1021
diff
changeset
|
787 void set_predicted_elapsed_time_ms(double ms) { |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1021
diff
changeset
|
788 _predicted_elapsed_time_ms = ms; |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1021
diff
changeset
|
789 } |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1021
diff
changeset
|
790 |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1021
diff
changeset
|
791 void set_predicted_bytes_to_copy(size_t bytes) { |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1021
diff
changeset
|
792 _predicted_bytes_to_copy = bytes; |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1021
diff
changeset
|
793 } |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1021
diff
changeset
|
794 |
342 | 795 #define HeapRegion_OOP_SINCE_SAVE_MARKS_DECL(OopClosureType, nv_suffix) \ |
796 virtual void oop_since_save_marks_iterate##nv_suffix(OopClosureType* cl); | |
797 SPECIALIZED_SINCE_SAVE_MARKS_CLOSURES(HeapRegion_OOP_SINCE_SAVE_MARKS_DECL) | |
798 | |
6254
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6027
diff
changeset
|
799 virtual CompactibleSpace* next_compaction_space() const; |
342 | 800 |
801 virtual void reset_after_compaction(); | |
802 | |
12080 | 803 // Routines for managing a list of code roots (attached to the |
804 // this region's RSet) that point into this heap region. | |
805 void add_strong_code_root(nmethod* nm); | |
806 void remove_strong_code_root(nmethod* nm); | |
807 | |
808 // During a collection, migrate the successfully evacuated | |
809 // strong code roots that referenced into this region to the | |
810 // new regions that they now point into. Unsuccessfully | |
811 // evacuated code roots are not migrated. | |
812 void migrate_strong_code_roots(); | |
813 | |
814 // Applies blk->do_code_blob() to each of the entries in | |
815 // the strong code roots list for this region | |
816 void strong_code_roots_do(CodeBlobClosure* blk) const; | |
817 | |
818 // Verify that the entries on the strong code root list for this | |
819 // region are live and include at least one pointer into this region. | |
820 void verify_strong_code_roots(VerifyOption vo, bool* failures) const; | |
821 | |
342 | 822 void print() const; |
823 void print_on(outputStream* st) const; | |
824 | |
3772
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
825 // vo == UsePrevMarking -> use "prev" marking information, |
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
826 // vo == UseNextMarking -> use "next" marking information |
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
827 // vo == UseMarkWord -> use the mark word in the object header |
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
828 // |
811 | 829 // NOTE: Only the "prev" marking information is guaranteed to be |
830 // consistent most of the time, so most calls to this should use | |
3772
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
831 // vo == UsePrevMarking. |
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
832 // Currently, there is only one case where this is called with |
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
833 // vo == UseNextMarking, which is to verify the "next" marking |
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
834 // information at the end of remark. |
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
835 // Currently there is only one place where this is called with |
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
836 // vo == UseMarkWord, which is to verify the marking during a |
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
837 // full GC. |
6008 | 838 void verify(VerifyOption vo, bool *failures) const; |
811 | 839 |
840 // Override; it uses the "prev" marking information | |
6008 | 841 virtual void verify() const; |
342 | 842 }; |
843 | |
844 // HeapRegionClosure is used for iterating over regions. | |
845 // Terminates the iteration when the "doHeapRegion" method returns "true". | |
846 class HeapRegionClosure : public StackObj { | |
847 friend class HeapRegionSeq; | |
848 friend class G1CollectedHeap; | |
849 | |
850 bool _complete; | |
851 void incomplete() { _complete = false; } | |
852 | |
853 public: | |
854 HeapRegionClosure(): _complete(true) {} | |
855 | |
856 // Typically called on each region until it returns true. | |
857 virtual bool doHeapRegion(HeapRegion* r) = 0; | |
858 | |
859 // True after iteration if the closure was applied to all heap regions | |
860 // and returned "false" in all cases. | |
861 bool complete() { return _complete; } | |
862 }; | |
863 | |
8001
db9981fd3124
8005915: Unify SERIALGC and INCLUDE_ALTERNATE_GCS
jprovino
parents:
6754
diff
changeset
|
864 #endif // INCLUDE_ALL_GCS |
1972 | 865 |
866 #endif // SHARE_VM_GC_IMPLEMENTATION_G1_HEAPREGION_HPP |