Mercurial > hg > truffle
annotate src/share/vm/gc_implementation/g1/heapRegion.hpp @ 4625:73f935f28920
in esa mode, check that values in stateAfter are all ready after LIRGen of a ValudeNode
author | Gilles Duboscq <duboscq@ssw.jku.at> |
---|---|
date | Fri, 17 Feb 2012 11:37:44 +0100 |
parents | dc467e8b2c5e |
children | 023652e49ac0 |
rev | line source |
---|---|
342 | 1 /* |
2133
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
2 * Copyright (c) 2001, 2011, 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" | |
35 | |
342 | 36 #ifndef SERIALGC |
37 | |
38 // A HeapRegion is the smallest piece of a G1CollectedHeap that | |
39 // can be collected independently. | |
40 | |
41 // NOTE: Although a HeapRegion is a Space, its | |
42 // Space::initDirtyCardClosure method must not be called. | |
43 // The problem is that the existence of this method breaks | |
44 // the independence of barrier sets from remembered sets. | |
45 // The solution is to remove this method from the definition | |
46 // of a Space. | |
47 | |
48 class CompactibleSpace; | |
49 class ContiguousSpace; | |
50 class HeapRegionRemSet; | |
51 class HeapRegionRemSetIterator; | |
52 class HeapRegion; | |
2152 | 53 class HeapRegionSetBase; |
54 | |
3766 | 55 #define HR_FORMAT SIZE_FORMAT":(%s)["PTR_FORMAT","PTR_FORMAT","PTR_FORMAT"]" |
56 #define HR_FORMAT_PARAMS(_hr_) \ | |
57 (_hr_)->hrs_index(), \ | |
58 (_hr_)->is_survivor() ? "S" : (_hr_)->is_young() ? "E" : "-", \ | |
59 (_hr_)->bottom(), (_hr_)->top(), (_hr_)->end() | |
342 | 60 |
61 // A dirty card to oop closure for heap regions. It | |
62 // knows how to get the G1 heap and how to use the bitmap | |
63 // in the concurrent marker used by G1 to filter remembered | |
64 // sets. | |
65 | |
66 class HeapRegionDCTOC : public ContiguousSpaceDCTOC { | |
67 public: | |
68 // Specification of possible DirtyCardToOopClosure filtering. | |
69 enum FilterKind { | |
70 NoFilterKind, | |
71 IntoCSFilterKind, | |
72 OutOfRegionFilterKind | |
73 }; | |
74 | |
75 protected: | |
76 HeapRegion* _hr; | |
77 FilterKind _fk; | |
78 G1CollectedHeap* _g1; | |
79 | |
80 void walk_mem_region_with_cl(MemRegion mr, | |
81 HeapWord* bottom, HeapWord* top, | |
82 OopClosure* cl); | |
83 | |
84 // We don't specialize this for FilteringClosure; filtering is handled by | |
85 // the "FilterKind" mechanism. But we provide this to avoid a compiler | |
86 // warning. | |
87 void walk_mem_region_with_cl(MemRegion mr, | |
88 HeapWord* bottom, HeapWord* top, | |
89 FilteringClosure* cl) { | |
90 HeapRegionDCTOC::walk_mem_region_with_cl(mr, bottom, top, | |
91 (OopClosure*)cl); | |
92 } | |
93 | |
94 // Get the actual top of the area on which the closure will | |
95 // operate, given where the top is assumed to be (the end of the | |
96 // memory region passed to do_MemRegion) and where the object | |
97 // at the top is assumed to start. For example, an object may | |
98 // start at the top but actually extend past the assumed top, | |
99 // in which case the top becomes the end of the object. | |
100 HeapWord* get_actual_top(HeapWord* top, HeapWord* top_obj) { | |
101 return ContiguousSpaceDCTOC::get_actual_top(top, top_obj); | |
102 } | |
103 | |
104 // Walk the given memory region from bottom to (actual) top | |
105 // looking for objects and applying the oop closure (_cl) to | |
106 // them. The base implementation of this treats the area as | |
107 // blocks, where a block may or may not be an object. Sub- | |
108 // classes should override this to provide more accurate | |
109 // or possibly more efficient walking. | |
110 void walk_mem_region(MemRegion mr, HeapWord* bottom, HeapWord* top) { | |
111 Filtering_DCTOC::walk_mem_region(mr, bottom, top); | |
112 } | |
113 | |
114 public: | |
115 HeapRegionDCTOC(G1CollectedHeap* g1, | |
116 HeapRegion* hr, OopClosure* cl, | |
117 CardTableModRefBS::PrecisionStyle precision, | |
118 FilterKind fk); | |
119 }; | |
120 | |
121 // The complicating factor is that BlockOffsetTable diverged | |
122 // significantly, and we need functionality that is only in the G1 version. | |
123 // So I copied that code, which led to an alternate G1 version of | |
124 // OffsetTableContigSpace. If the two versions of BlockOffsetTable could | |
125 // be reconciled, then G1OffsetTableContigSpace could go away. | |
126 | |
127 // The idea behind time stamps is the following. Doing a save_marks on | |
128 // all regions at every GC pause is time consuming (if I remember | |
129 // well, 10ms or so). So, we would like to do that only for regions | |
130 // that are GC alloc regions. To achieve this, we use time | |
131 // stamps. For every evacuation pause, G1CollectedHeap generates a | |
132 // unique time stamp (essentially a counter that gets | |
133 // incremented). Every time we want to call save_marks on a region, | |
134 // we set the saved_mark_word to top and also copy the current GC | |
135 // time stamp to the time stamp field of the space. Reading the | |
136 // saved_mark_word involves checking the time stamp of the | |
137 // region. If it is the same as the current GC time stamp, then we | |
138 // can safely read the saved_mark_word field, as it is valid. If the | |
139 // time stamp of the region is not the same as the current GC time | |
140 // stamp, then we instead read top, as the saved_mark_word field is | |
141 // invalid. Time stamps (on the regions and also on the | |
142 // G1CollectedHeap) are reset at every cleanup (we iterate over | |
143 // the regions anyway) and at the end of a Full GC. The current scheme | |
144 // that uses sequential unsigned ints will fail only if we have 4b | |
145 // evacuation pauses between two cleanups, which is _highly_ unlikely. | |
146 | |
147 class G1OffsetTableContigSpace: public ContiguousSpace { | |
148 friend class VMStructs; | |
149 protected: | |
150 G1BlockOffsetArrayContigSpace _offsets; | |
151 Mutex _par_alloc_lock; | |
152 volatile unsigned _gc_time_stamp; | |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2361
diff
changeset
|
153 // 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
|
154 // 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
|
155 // 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
|
156 // 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
|
157 // 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
|
158 // 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
|
159 HeapWord* _pre_dummy_top; |
342 | 160 |
161 public: | |
162 // Constructor. If "is_zeroed" is true, the MemRegion "mr" may be | |
163 // assumed to contain zeros. | |
164 G1OffsetTableContigSpace(G1BlockOffsetSharedArray* sharedOffsetArray, | |
165 MemRegion mr, bool is_zeroed = false); | |
166 | |
167 void set_bottom(HeapWord* value); | |
168 void set_end(HeapWord* value); | |
169 | |
170 virtual HeapWord* saved_mark_word() const; | |
171 virtual void set_saved_mark(); | |
172 void reset_gc_time_stamp() { _gc_time_stamp = 0; } | |
173 | |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2361
diff
changeset
|
174 // 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
|
175 // explanation of what it is. |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2361
diff
changeset
|
176 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
|
177 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
|
178 _pre_dummy_top = pre_dummy_top; |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2361
diff
changeset
|
179 } |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2361
diff
changeset
|
180 HeapWord* pre_dummy_top() { |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2361
diff
changeset
|
181 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
|
182 } |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2361
diff
changeset
|
183 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
|
184 |
356 | 185 virtual void initialize(MemRegion mr, bool clear_space, bool mangle_space); |
186 virtual void clear(bool mangle_space); | |
342 | 187 |
188 HeapWord* block_start(const void* p); | |
189 HeapWord* block_start_const(const void* p) const; | |
190 | |
191 // Add offset table update. | |
192 virtual HeapWord* allocate(size_t word_size); | |
193 HeapWord* par_allocate(size_t word_size); | |
194 | |
195 // MarkSweep support phase3 | |
196 virtual HeapWord* initialize_threshold(); | |
197 virtual HeapWord* cross_threshold(HeapWord* start, HeapWord* end); | |
198 | |
199 virtual void print() const; | |
2133
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
200 |
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
201 void reset_bot() { |
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
202 _offsets.zero_bottom_entry(); |
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
203 _offsets.initialize_threshold(); |
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
204 } |
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
205 |
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
206 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
|
207 _offsets.alloc_block(start, word_size); |
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
208 } |
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
209 |
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
210 void print_bot_on(outputStream* out) { |
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
211 _offsets.print_on(out); |
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
212 } |
342 | 213 }; |
214 | |
215 class HeapRegion: public G1OffsetTableContigSpace { | |
216 friend class VMStructs; | |
217 private: | |
218 | |
355 | 219 enum HumongousType { |
220 NotHumongous = 0, | |
221 StartsHumongous, | |
222 ContinuesHumongous | |
223 }; | |
224 | |
342 | 225 // Requires that the region "mr" be dense with objects, and begin and end |
226 // with an object. | |
227 void oops_in_mr_iterate(MemRegion mr, OopClosure* cl); | |
228 | |
229 // The remembered set for this region. | |
230 // (Might want to make this "inline" later, to avoid some alloc failure | |
231 // issues.) | |
232 HeapRegionRemSet* _rem_set; | |
233 | |
234 G1BlockOffsetArrayContigSpace* offsets() { return &_offsets; } | |
235 | |
236 protected: | |
3766 | 237 // The index of this region in the heap region sequence. |
238 size_t _hrs_index; | |
342 | 239 |
355 | 240 HumongousType _humongous_type; |
342 | 241 // For a humongous region, region in which it starts. |
242 HeapRegion* _humongous_start_region; | |
243 // For the start region of a humongous sequence, it's original end(). | |
244 HeapWord* _orig_end; | |
245 | |
246 // True iff the region is in current collection_set. | |
247 bool _in_collection_set; | |
248 | |
249 // True iff an attempt to evacuate an object in the region failed. | |
250 bool _evacuation_failed; | |
251 | |
252 // A heap region may be a member one of a number of special subsets, each | |
253 // represented as linked lists through the field below. Currently, these | |
254 // sets include: | |
255 // The collection set. | |
256 // The set of allocation regions used in a collection pause. | |
257 // Spaces that may contain gray objects. | |
258 HeapRegion* _next_in_special_set; | |
259 | |
260 // next region in the young "generation" region set | |
261 HeapRegion* _next_young_region; | |
262 | |
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
677
diff
changeset
|
263 // Next region whose cards need cleaning |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
677
diff
changeset
|
264 HeapRegion* _next_dirty_cards_region; |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
677
diff
changeset
|
265 |
2152 | 266 // Fields used by the HeapRegionSetBase class and subclasses. |
267 HeapRegion* _next; | |
268 #ifdef ASSERT | |
269 HeapRegionSetBase* _containing_set; | |
270 #endif // ASSERT | |
271 bool _pending_removal; | |
272 | |
342 | 273 // For parallel heapRegion traversal. |
274 jint _claimed; | |
275 | |
276 // We use concurrent marking to determine the amount of live data | |
277 // in each heap region. | |
278 size_t _prev_marked_bytes; // Bytes known to be live via last completed marking. | |
279 size_t _next_marked_bytes; // Bytes known to be live via in-progress marking. | |
280 | |
281 // See "sort_index" method. -1 means is not in the array. | |
282 int _sort_index; | |
283 | |
284 // <PREDICTION> | |
285 double _gc_efficiency; | |
286 // </PREDICTION> | |
287 | |
288 enum YoungType { | |
289 NotYoung, // a region is not young | |
290 Young, // a region is young | |
3766 | 291 Survivor // a region is young and it contains survivors |
342 | 292 }; |
293 | |
1666
5cbac8938c4c
6956639: G1: assert(cached_ptr != card_ptr) failed: shouldn't be, concurrentG1Refine.cpp:307
johnc
parents:
1552
diff
changeset
|
294 volatile YoungType _young_type; |
342 | 295 int _young_index_in_cset; |
296 SurvRateGroup* _surv_rate_group; | |
297 int _age_index; | |
298 | |
299 // The start of the unmarked area. The unmarked area extends from this | |
300 // word until the top and/or end of the region, and is the part | |
301 // of the region for which no marking was done, i.e. objects may | |
302 // have been allocated in this part since the last mark phase. | |
303 // "prev" is the top at the start of the last completed marking. | |
304 // "next" is the top at the start of the in-progress marking (if any.) | |
305 HeapWord* _prev_top_at_mark_start; | |
306 HeapWord* _next_top_at_mark_start; | |
307 // If a collection pause is in progress, this is the top at the start | |
308 // of that pause. | |
309 | |
310 // We've counted the marked bytes of objects below here. | |
311 HeapWord* _top_at_conc_mark_count; | |
312 | |
313 void init_top_at_mark_start() { | |
314 assert(_prev_marked_bytes == 0 && | |
315 _next_marked_bytes == 0, | |
316 "Must be called after zero_marked_bytes."); | |
317 HeapWord* bot = bottom(); | |
318 _prev_top_at_mark_start = bot; | |
319 _next_top_at_mark_start = bot; | |
320 _top_at_conc_mark_count = bot; | |
321 } | |
322 | |
323 void set_young_type(YoungType new_type) { | |
324 //assert(_young_type != new_type, "setting the same type" ); | |
325 // TODO: add more assertions here | |
326 _young_type = new_type; | |
327 } | |
328 | |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1021
diff
changeset
|
329 // 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
|
330 |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1021
diff
changeset
|
331 // 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
|
332 // for the collection set. |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1021
diff
changeset
|
333 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
|
334 |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1021
diff
changeset
|
335 // 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
|
336 // for the collection set. |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1021
diff
changeset
|
337 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
|
338 |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1021
diff
changeset
|
339 // 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
|
340 // 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
|
341 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
|
342 |
342 | 343 public: |
344 // If "is_zeroed" is "true", the region "mr" can be assumed to contain zeros. | |
3766 | 345 HeapRegion(size_t hrs_index, |
346 G1BlockOffsetSharedArray* sharedOffsetArray, | |
342 | 347 MemRegion mr, bool is_zeroed); |
348 | |
3986
65a8ff39a6da
7095194: G1: HeapRegion::GrainBytes, GrainWords, and CardsPerRegion should be size_t
johnc
parents:
3980
diff
changeset
|
349 static int LogOfHRGrainBytes; |
65a8ff39a6da
7095194: G1: HeapRegion::GrainBytes, GrainWords, and CardsPerRegion should be size_t
johnc
parents:
3980
diff
changeset
|
350 static int LogOfHRGrainWords; |
65a8ff39a6da
7095194: G1: HeapRegion::GrainBytes, GrainWords, and CardsPerRegion should be size_t
johnc
parents:
3980
diff
changeset
|
351 |
65a8ff39a6da
7095194: G1: HeapRegion::GrainBytes, GrainWords, and CardsPerRegion should be size_t
johnc
parents:
3980
diff
changeset
|
352 static size_t GrainBytes; |
65a8ff39a6da
7095194: G1: HeapRegion::GrainBytes, GrainWords, and CardsPerRegion should be size_t
johnc
parents:
3980
diff
changeset
|
353 static size_t GrainWords; |
65a8ff39a6da
7095194: G1: HeapRegion::GrainBytes, GrainWords, and CardsPerRegion should be size_t
johnc
parents:
3980
diff
changeset
|
354 static size_t CardsPerRegion; |
942
2c79770d1f6e
6819085: G1: use larger and/or user settable region size
tonyp
parents:
811
diff
changeset
|
355 |
3980
8229bd737950
7075646: G1: fix inconsistencies in the monitoring data
tonyp
parents:
3979
diff
changeset
|
356 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
|
357 return (sz + (size_t) GrainBytes - 1) & |
8229bd737950
7075646: G1: fix inconsistencies in the monitoring data
tonyp
parents:
3979
diff
changeset
|
358 ~((1 << (size_t) LogOfHRGrainBytes) - 1); |
8229bd737950
7075646: G1: fix inconsistencies in the monitoring data
tonyp
parents:
3979
diff
changeset
|
359 } |
8229bd737950
7075646: G1: fix inconsistencies in the monitoring data
tonyp
parents:
3979
diff
changeset
|
360 |
942
2c79770d1f6e
6819085: G1: use larger and/or user settable region size
tonyp
parents:
811
diff
changeset
|
361 // 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
|
362 // 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
|
363 // size (LogOfHRGrainBytes / LogOfHRGrainWords / |
2c79770d1f6e
6819085: G1: use larger and/or user settable region size
tonyp
parents:
811
diff
changeset
|
364 // CardsPerRegion). All those fields are considered constant |
2c79770d1f6e
6819085: G1: use larger and/or user settable region size
tonyp
parents:
811
diff
changeset
|
365 // 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
|
366 // up once during initialization time. |
2c79770d1f6e
6819085: G1: use larger and/or user settable region size
tonyp
parents:
811
diff
changeset
|
367 static void setup_heap_region_size(uintx min_heap_size); |
342 | 368 |
355 | 369 enum ClaimValues { |
4097
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4093
diff
changeset
|
370 InitialClaimValue = 0, |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4093
diff
changeset
|
371 FinalCountClaimValue = 1, |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4093
diff
changeset
|
372 NoteEndClaimValue = 2, |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4093
diff
changeset
|
373 ScrubRemSetClaimValue = 3, |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4093
diff
changeset
|
374 ParVerifyClaimValue = 4, |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4093
diff
changeset
|
375 RebuildRSClaimValue = 5, |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4093
diff
changeset
|
376 CompleteMarkCSetClaimValue = 6 |
355 | 377 }; |
378 | |
2134
b158bed62ef5
6994297: G1: do first-level slow-path allocations with a CAS
tonyp
parents:
2133
diff
changeset
|
379 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
|
380 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
|
381 return ContiguousSpace::par_allocate(word_size); |
b158bed62ef5
6994297: G1: do first-level slow-path allocations with a CAS
tonyp
parents:
2133
diff
changeset
|
382 } |
b158bed62ef5
6994297: G1: do first-level slow-path allocations with a CAS
tonyp
parents:
2133
diff
changeset
|
383 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
|
384 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
|
385 return ContiguousSpace::allocate(word_size); |
b158bed62ef5
6994297: G1: do first-level slow-path allocations with a CAS
tonyp
parents:
2133
diff
changeset
|
386 } |
b158bed62ef5
6994297: G1: do first-level slow-path allocations with a CAS
tonyp
parents:
2133
diff
changeset
|
387 |
342 | 388 // If this region is a member of a HeapRegionSeq, the index in that |
389 // sequence, otherwise -1. | |
3766 | 390 size_t hrs_index() const { return _hrs_index; } |
342 | 391 |
392 // The number of bytes marked live in the region in the last marking phase. | |
393 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
|
394 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
|
395 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
|
396 } |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2433
diff
changeset
|
397 |
342 | 398 // The number of bytes counted in the next marking. |
399 size_t next_marked_bytes() { return _next_marked_bytes; } | |
400 // The number of bytes live wrt the next marking. | |
401 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
|
402 return |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2433
diff
changeset
|
403 (top() - next_top_at_mark_start()) * HeapWordSize + next_marked_bytes(); |
342 | 404 } |
405 | |
406 // A lower bound on the amount of garbage bytes in the region. | |
407 size_t garbage_bytes() { | |
408 size_t used_at_mark_start_bytes = | |
409 (prev_top_at_mark_start() - bottom()) * HeapWordSize; | |
410 assert(used_at_mark_start_bytes >= marked_bytes(), | |
411 "Can't mark more than we have."); | |
412 return used_at_mark_start_bytes - marked_bytes(); | |
413 } | |
414 | |
415 // An upper bound on the number of live bytes in the region. | |
416 size_t max_live_bytes() { return used() - garbage_bytes(); } | |
417 | |
418 void add_to_marked_bytes(size_t incr_bytes) { | |
419 _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
|
420 assert(_next_marked_bytes <= used(), "invariant" ); |
342 | 421 } |
422 | |
423 void zero_marked_bytes() { | |
424 _prev_marked_bytes = _next_marked_bytes = 0; | |
425 } | |
426 | |
355 | 427 bool isHumongous() const { return _humongous_type != NotHumongous; } |
428 bool startsHumongous() const { return _humongous_type == StartsHumongous; } | |
429 bool continuesHumongous() const { return _humongous_type == ContinuesHumongous; } | |
342 | 430 // For a humongous region, region in which it starts. |
431 HeapRegion* humongous_start_region() const { | |
432 return _humongous_start_region; | |
433 } | |
434 | |
4020
5e5d4821bf07
7097516: G1: assert(0<= from_card && from_card<HeapRegion::CardsPerRegion) failed: Must be in range.
brutisso
parents:
3986
diff
changeset
|
435 // 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
|
436 // 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
|
437 // 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
|
438 // corresponding humongous object. |
5e5d4821bf07
7097516: G1: assert(0<= from_card && from_card<HeapRegion::CardsPerRegion) failed: Must be in range.
brutisso
parents:
3986
diff
changeset
|
439 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
|
440 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
|
441 } |
5e5d4821bf07
7097516: G1: assert(0<= from_card && from_card<HeapRegion::CardsPerRegion) failed: Must be in range.
brutisso
parents:
3986
diff
changeset
|
442 |
2133
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
443 // 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
|
444 // 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
|
445 // 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
|
446 // are as follows: |
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
447 // |
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
448 // 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
|
449 // 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
|
450 // 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
|
451 // 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
|
452 // region in the series. |
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
453 // |
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
454 // 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
|
455 // 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
|
456 // 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
|
457 // as the original end of this region. |
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
458 // |
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
459 // 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
|
460 // 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
|
461 // 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
|
462 // 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
|
463 // 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
|
464 // "starts humongous" regions and by ignoring the "continues |
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
465 // humongous" regions. |
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
466 void set_startsHumongous(HeapWord* new_top, HeapWord* new_end); |
342 | 467 |
2133
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
468 // Makes the current region be a "continues humongous' |
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
469 // 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
|
470 // which this region will be part of. |
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
471 void set_continuesHumongous(HeapRegion* first_hr); |
342 | 472 |
2152 | 473 // Unsets the humongous-related fields on the region. |
474 void set_notHumongous(); | |
475 | |
342 | 476 // If the region has a remembered set, return a pointer to it. |
477 HeapRegionRemSet* rem_set() const { | |
478 return _rem_set; | |
479 } | |
480 | |
481 // True iff the region is in current collection_set. | |
482 bool in_collection_set() const { | |
483 return _in_collection_set; | |
484 } | |
485 void set_in_collection_set(bool b) { | |
486 _in_collection_set = b; | |
487 } | |
488 HeapRegion* next_in_collection_set() { | |
489 assert(in_collection_set(), "should only invoke on member of CS."); | |
490 assert(_next_in_special_set == NULL || | |
491 _next_in_special_set->in_collection_set(), | |
492 "Malformed CS."); | |
493 return _next_in_special_set; | |
494 } | |
495 void set_next_in_collection_set(HeapRegion* r) { | |
496 assert(in_collection_set(), "should only invoke on member of CS."); | |
497 assert(r == NULL || r->in_collection_set(), "Malformed CS."); | |
498 _next_in_special_set = r; | |
499 } | |
500 | |
2152 | 501 // Methods used by the HeapRegionSetBase class and subclasses. |
342 | 502 |
2152 | 503 // Getter and setter for the next field used to link regions into |
504 // linked lists. | |
505 HeapRegion* next() { return _next; } | |
506 | |
507 void set_next(HeapRegion* next) { _next = next; } | |
342 | 508 |
2152 | 509 // Every region added to a set is tagged with a reference to that |
510 // set. This is used for doing consistency checking to make sure that | |
511 // the contents of a set are as they should be and it's only | |
512 // available in non-product builds. | |
513 #ifdef ASSERT | |
514 void set_containing_set(HeapRegionSetBase* containing_set) { | |
515 assert((containing_set == NULL && _containing_set != NULL) || | |
516 (containing_set != NULL && _containing_set == NULL), | |
517 err_msg("containing_set: "PTR_FORMAT" " | |
518 "_containing_set: "PTR_FORMAT, | |
519 containing_set, _containing_set)); | |
520 | |
521 _containing_set = containing_set; | |
2361 | 522 } |
342 | 523 |
2152 | 524 HeapRegionSetBase* containing_set() { return _containing_set; } |
525 #else // ASSERT | |
526 void set_containing_set(HeapRegionSetBase* containing_set) { } | |
342 | 527 |
2361 | 528 // containing_set() is only used in asserts so there's no reason |
2152 | 529 // to provide a dummy version of it. |
530 #endif // ASSERT | |
342 | 531 |
2152 | 532 // If we want to remove regions from a list in bulk we can simply tag |
533 // them with the pending_removal tag and call the | |
534 // remove_all_pending() method on the list. | |
342 | 535 |
2152 | 536 bool pending_removal() { return _pending_removal; } |
537 | |
538 void set_pending_removal(bool pending_removal) { | |
2361 | 539 if (pending_removal) { |
540 assert(!_pending_removal && containing_set() != NULL, | |
541 "can only set pending removal to true if it's false and " | |
542 "the region belongs to a region set"); | |
543 } else { | |
544 assert( _pending_removal && containing_set() == NULL, | |
545 "can only set pending removal to false if it's true and " | |
546 "the region does not belong to a region set"); | |
547 } | |
2152 | 548 |
549 _pending_removal = pending_removal; | |
342 | 550 } |
551 | |
552 HeapRegion* get_next_young_region() { return _next_young_region; } | |
553 void set_next_young_region(HeapRegion* hr) { | |
554 _next_young_region = hr; | |
555 } | |
556 | |
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
677
diff
changeset
|
557 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
|
558 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
|
559 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
|
560 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
|
561 |
3766 | 562 HeapWord* orig_end() { return _orig_end; } |
563 | |
342 | 564 // Allows logical separation between objects allocated before and after. |
565 void save_marks(); | |
566 | |
567 // Reset HR stuff to default values. | |
568 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
|
569 void par_clear(); |
342 | 570 |
356 | 571 void initialize(MemRegion mr, bool clear_space, bool mangle_space); |
342 | 572 |
573 // Get the start of the unmarked area in this region. | |
574 HeapWord* prev_top_at_mark_start() const { return _prev_top_at_mark_start; } | |
575 HeapWord* next_top_at_mark_start() const { return _next_top_at_mark_start; } | |
576 | |
577 // Apply "cl->do_oop" to (the addresses of) all reference fields in objects | |
578 // allocated in the current region before the last call to "save_mark". | |
579 void oop_before_save_marks_iterate(OopClosure* cl); | |
580 | |
581 // Note the start or end of marking. This tells the heap region | |
582 // that the collector is about to start or has finished (concurrently) | |
583 // marking the heap. | |
584 | |
585 // Note the start of a marking phase. Record the | |
586 // start of the unmarked area of the region here. | |
587 void note_start_of_marking(bool during_initial_mark) { | |
588 init_top_at_conc_mark_count(); | |
589 _next_marked_bytes = 0; | |
590 if (during_initial_mark && is_young() && !is_survivor()) | |
591 _next_top_at_mark_start = bottom(); | |
592 else | |
593 _next_top_at_mark_start = top(); | |
594 } | |
595 | |
596 // Note the end of a marking phase. Install the start of | |
597 // the unmarked area that was captured at start of marking. | |
598 void note_end_of_marking() { | |
599 _prev_top_at_mark_start = _next_top_at_mark_start; | |
600 _prev_marked_bytes = _next_marked_bytes; | |
601 _next_marked_bytes = 0; | |
602 | |
603 guarantee(_prev_marked_bytes <= | |
604 (size_t) (prev_top_at_mark_start() - bottom()) * HeapWordSize, | |
605 "invariant"); | |
606 } | |
607 | |
608 // After an evacuation, we need to update _next_top_at_mark_start | |
609 // to be the current top. Note this is only valid if we have only | |
610 // ever evacuated into this region. If we evacuate, allocate, and | |
611 // then evacuate we are in deep doodoo. | |
612 void note_end_of_copying() { | |
1021
1f19207eefc2
6847956: G1: crash in oopDesc*G1ParCopyHelper::copy_to_survivor_space(oopDesc*)
tonyp
parents:
1020
diff
changeset
|
613 assert(top() >= _next_top_at_mark_start, "Increase only"); |
1f19207eefc2
6847956: G1: crash in oopDesc*G1ParCopyHelper::copy_to_survivor_space(oopDesc*)
tonyp
parents:
1020
diff
changeset
|
614 _next_top_at_mark_start = top(); |
342 | 615 } |
616 | |
617 // Returns "false" iff no object in the region was allocated when the | |
618 // last mark phase ended. | |
619 bool is_marked() { return _prev_top_at_mark_start != bottom(); } | |
620 | |
621 // If "is_marked()" is true, then this is the index of the region in | |
622 // an array constructed at the end of marking of the regions in a | |
623 // "desirability" order. | |
624 int sort_index() { | |
625 return _sort_index; | |
626 } | |
627 void set_sort_index(int i) { | |
628 _sort_index = i; | |
629 } | |
630 | |
631 void init_top_at_conc_mark_count() { | |
632 _top_at_conc_mark_count = bottom(); | |
633 } | |
634 | |
635 void set_top_at_conc_mark_count(HeapWord *cur) { | |
636 assert(bottom() <= cur && cur <= end(), "Sanity."); | |
637 _top_at_conc_mark_count = cur; | |
638 } | |
639 | |
640 HeapWord* top_at_conc_mark_count() { | |
641 return _top_at_conc_mark_count; | |
642 } | |
643 | |
644 void reset_during_compaction() { | |
645 guarantee( isHumongous() && startsHumongous(), | |
646 "should only be called for humongous regions"); | |
647 | |
648 zero_marked_bytes(); | |
649 init_top_at_mark_start(); | |
650 } | |
651 | |
652 // <PREDICTION> | |
653 void calc_gc_efficiency(void); | |
654 double gc_efficiency() { return _gc_efficiency;} | |
655 // </PREDICTION> | |
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 init_top_at_conc_mark_count(); | |
742 _next_marked_bytes = 0; | |
743 } | |
744 } | |
745 | |
746 // Requires that "mr" be entirely within the region. | |
747 // Apply "cl->do_object" to all objects that intersect with "mr". | |
748 // If the iteration encounters an unparseable portion of the region, | |
749 // or if "cl->abort()" is true after a closure application, | |
750 // terminate the iteration and return the address of the start of the | |
751 // subregion that isn't done. (The two can be distinguished by querying | |
752 // "cl->abort()".) Return of "NULL" indicates that the iteration | |
753 // completed. | |
754 HeapWord* | |
755 object_iterate_mem_careful(MemRegion mr, ObjectClosure* cl); | |
756 | |
3317
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
2435
diff
changeset
|
757 // 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
|
758 // 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
|
759 // 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
|
760 // 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
|
761 // iteration. |
342 | 762 HeapWord* |
763 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
|
764 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
|
765 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
|
766 jbyte* card_ptr); |
342 | 767 |
768 // A version of block start that is guaranteed to find *some* block | |
769 // boundary at or before "p", but does not object iteration, and may | |
770 // therefore be used safely when the heap is unparseable. | |
771 HeapWord* block_start_careful(const void* p) const { | |
772 return _offsets.block_start_careful(p); | |
773 } | |
774 | |
775 // Requires that "addr" is within the region. Returns the start of the | |
776 // first ("careful") block that starts at or after "addr", or else the | |
777 // "end" of the region if there is no such block. | |
778 HeapWord* next_block_start_careful(HeapWord* addr); | |
779 | |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1021
diff
changeset
|
780 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
|
781 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
|
782 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
|
783 |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1021
diff
changeset
|
784 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
|
785 _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
|
786 } |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1021
diff
changeset
|
787 |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1021
diff
changeset
|
788 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
|
789 _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
|
790 } |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1021
diff
changeset
|
791 |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1021
diff
changeset
|
792 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
|
793 _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
|
794 } |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1021
diff
changeset
|
795 |
342 | 796 #define HeapRegion_OOP_SINCE_SAVE_MARKS_DECL(OopClosureType, nv_suffix) \ |
797 virtual void oop_since_save_marks_iterate##nv_suffix(OopClosureType* cl); | |
798 SPECIALIZED_SINCE_SAVE_MARKS_CLOSURES(HeapRegion_OOP_SINCE_SAVE_MARKS_DECL) | |
799 | |
800 CompactibleSpace* next_compaction_space() const; | |
801 | |
802 virtual void reset_after_compaction(); | |
803 | |
804 void print() const; | |
805 void print_on(outputStream* st) const; | |
806 | |
3772
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
807 // vo == UsePrevMarking -> use "prev" marking information, |
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
808 // vo == UseNextMarking -> use "next" marking information |
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
809 // vo == UseMarkWord -> use the mark word in the object header |
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
810 // |
811 | 811 // NOTE: Only the "prev" marking information is guaranteed to be |
812 // 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
|
813 // vo == UsePrevMarking. |
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
814 // 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
|
815 // vo == UseNextMarking, which is to verify the "next" marking |
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
816 // information at the end of remark. |
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
817 // 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
|
818 // vo == UseMarkWord, which is to verify the marking during a |
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
819 // full GC. |
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
820 void verify(bool allow_dirty, VerifyOption vo, bool *failures) const; |
811 | 821 |
822 // Override; it uses the "prev" marking information | |
342 | 823 virtual void verify(bool allow_dirty) const; |
824 }; | |
825 | |
826 // HeapRegionClosure is used for iterating over regions. | |
827 // Terminates the iteration when the "doHeapRegion" method returns "true". | |
828 class HeapRegionClosure : public StackObj { | |
829 friend class HeapRegionSeq; | |
830 friend class G1CollectedHeap; | |
831 | |
832 bool _complete; | |
833 void incomplete() { _complete = false; } | |
834 | |
835 public: | |
836 HeapRegionClosure(): _complete(true) {} | |
837 | |
838 // Typically called on each region until it returns true. | |
839 virtual bool doHeapRegion(HeapRegion* r) = 0; | |
840 | |
841 // True after iteration if the closure was applied to all heap regions | |
842 // and returned "false" in all cases. | |
843 bool complete() { return _complete; } | |
844 }; | |
845 | |
846 #endif // SERIALGC | |
1972 | 847 |
848 #endif // SHARE_VM_GC_IMPLEMENTATION_G1_HEAPREGION_HPP |