author | david |
Tue, 29 Sep 2015 11:02:08 +0200 | |
changeset 33105 | 294e48b4f704 |
parent 32389 | 626f27450e12 |
child 33205 | bc9fec5e7656 |
permissions | -rw-r--r-- |
1374 | 1 |
/* |
30764 | 2 |
* Copyright (c) 2001, 2015, Oracle and/or its affiliates. All rights reserved. |
1374 | 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 |
* |
|
5547
f4b087cbb361
6941466: Oracle rebranding changes for Hotspot repositories
trims
parents:
5350
diff
changeset
|
19 |
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
f4b087cbb361
6941466: Oracle rebranding changes for Hotspot repositories
trims
parents:
5350
diff
changeset
|
20 |
* or visit www.oracle.com if you need additional information or have any |
f4b087cbb361
6941466: Oracle rebranding changes for Hotspot repositories
trims
parents:
5350
diff
changeset
|
21 |
* questions. |
1374 | 22 |
* |
23 |
*/ |
|
24 |
||
30764 | 25 |
#ifndef SHARE_VM_GC_G1_HEAPREGION_HPP |
26 |
#define SHARE_VM_GC_G1_HEAPREGION_HPP |
|
7397 | 27 |
|
30764 | 28 |
#include "gc/g1/g1AllocationContext.hpp" |
29 |
#include "gc/g1/g1BlockOffsetTable.hpp" |
|
30 |
#include "gc/g1/heapRegionType.hpp" |
|
31 |
#include "gc/g1/survRateGroup.hpp" |
|
32 |
#include "gc/shared/ageTable.hpp" |
|
33 |
#include "gc/shared/spaceDecorator.hpp" |
|
34 |
#include "gc/shared/watermark.hpp" |
|
15482
470d0b0c09f1
8005915: Unify SERIALGC and INCLUDE_ALTERNATE_GCS
jprovino
parents:
13756
diff
changeset
|
35 |
#include "utilities/macros.hpp" |
7397 | 36 |
|
1374 | 37 |
// A HeapRegion is the smallest piece of a G1CollectedHeap that |
38 |
// can be collected independently. |
|
39 |
||
40 |
// NOTE: Although a HeapRegion is a Space, its |
|
41 |
// Space::initDirtyCardClosure method must not be called. |
|
42 |
// The problem is that the existence of this method breaks |
|
43 |
// the independence of barrier sets from remembered sets. |
|
44 |
// The solution is to remove this method from the definition |
|
45 |
// of a Space. |
|
46 |
||
30265
609384e91c30
8078048: Fix non-pch build after "8076457: Fix includes of inline.hpp in GC code"
goetz
parents:
30175
diff
changeset
|
47 |
class G1CollectedHeap; |
1374 | 48 |
class HeapRegionRemSet; |
49 |
class HeapRegionRemSetIterator; |
|
50 |
class HeapRegion; |
|
7923 | 51 |
class HeapRegionSetBase; |
19339 | 52 |
class nmethod; |
7923 | 53 |
|
31592
43f48e165466
8081202: Hotspot compile warning: "Invalid suffix on literal; C++11 requires a space between literal and identifier"
bpittore
parents:
31346
diff
changeset
|
54 |
#define HR_FORMAT "%u:(%s)[" PTR_FORMAT "," PTR_FORMAT "," PTR_FORMAT "]" |
9989 | 55 |
#define HR_FORMAT_PARAMS(_hr_) \ |
26316
93f6b40c038b
8054819: Rename HeapRegionSeq to HeapRegionManager
tschatzl
parents:
26157
diff
changeset
|
56 |
(_hr_)->hrm_index(), \ |
26696
623a25e6c686
8057768: Make heap region region type in G1 HeapRegion explicit
tonyp
parents:
26422
diff
changeset
|
57 |
(_hr_)->get_short_type_str(), \ |
24424
2658d7834c6e
8037816: Fix for 8036122 breaks build with Xcode5/clang
drchase
parents:
23471
diff
changeset
|
58 |
p2i((_hr_)->bottom()), p2i((_hr_)->top()), p2i((_hr_)->end()) |
1374 | 59 |
|
26316
93f6b40c038b
8054819: Rename HeapRegionSeq to HeapRegionManager
tschatzl
parents:
26157
diff
changeset
|
60 |
// sentinel value for hrm_index |
93f6b40c038b
8054819: Rename HeapRegionSeq to HeapRegionManager
tschatzl
parents:
26157
diff
changeset
|
61 |
#define G1_NO_HRM_INDEX ((uint) -1) |
12381
1438e0fbfa27
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
12379
diff
changeset
|
62 |
|
1374 | 63 |
// A dirty card to oop closure for heap regions. It |
64 |
// knows how to get the G1 heap and how to use the bitmap |
|
65 |
// in the concurrent marker used by G1 to filter remembered |
|
66 |
// sets. |
|
67 |
||
25360
5b6141bf7564
8047819: G1 HeapRegionDCTOC does not need to inherit ContiguousSpaceDCTOC
mgerdin
parents:
24424
diff
changeset
|
68 |
class HeapRegionDCTOC : public DirtyCardToOopClosure { |
28207
6ad23566cbef
8067655: Clean up G1 remembered set oop iteration
mgerdin
parents:
27889
diff
changeset
|
69 |
private: |
1374 | 70 |
HeapRegion* _hr; |
28207
6ad23566cbef
8067655: Clean up G1 remembered set oop iteration
mgerdin
parents:
27889
diff
changeset
|
71 |
G1ParPushHeapRSClosure* _rs_scan; |
1374 | 72 |
G1CollectedHeap* _g1; |
73 |
||
74 |
// Walk the given memory region from bottom to (actual) top |
|
75 |
// looking for objects and applying the oop closure (_cl) to |
|
76 |
// them. The base implementation of this treats the area as |
|
77 |
// blocks, where a block may or may not be an object. Sub- |
|
78 |
// classes should override this to provide more accurate |
|
79 |
// or possibly more efficient walking. |
|
25360
5b6141bf7564
8047819: G1 HeapRegionDCTOC does not need to inherit ContiguousSpaceDCTOC
mgerdin
parents:
24424
diff
changeset
|
80 |
void walk_mem_region(MemRegion mr, HeapWord* bottom, HeapWord* top); |
1374 | 81 |
|
82 |
public: |
|
83 |
HeapRegionDCTOC(G1CollectedHeap* g1, |
|
28207
6ad23566cbef
8067655: Clean up G1 remembered set oop iteration
mgerdin
parents:
27889
diff
changeset
|
84 |
HeapRegion* hr, |
6ad23566cbef
8067655: Clean up G1 remembered set oop iteration
mgerdin
parents:
27889
diff
changeset
|
85 |
G1ParPushHeapRSClosure* cl, |
6ad23566cbef
8067655: Clean up G1 remembered set oop iteration
mgerdin
parents:
27889
diff
changeset
|
86 |
CardTableModRefBS::PrecisionStyle precision); |
1374 | 87 |
}; |
88 |
||
89 |
// The complicating factor is that BlockOffsetTable diverged |
|
90 |
// significantly, and we need functionality that is only in the G1 version. |
|
91 |
// So I copied that code, which led to an alternate G1 version of |
|
92 |
// OffsetTableContigSpace. If the two versions of BlockOffsetTable could |
|
93 |
// be reconciled, then G1OffsetTableContigSpace could go away. |
|
94 |
||
27889
7d50f95e0076
8065358: Refactor G1s usage of save_marks and reduce related races
mgerdin
parents:
27624
diff
changeset
|
95 |
// The idea behind time stamps is the following. We want to keep track of |
7d50f95e0076
8065358: Refactor G1s usage of save_marks and reduce related races
mgerdin
parents:
27624
diff
changeset
|
96 |
// the highest address where it's safe to scan objects for each region. |
7d50f95e0076
8065358: Refactor G1s usage of save_marks and reduce related races
mgerdin
parents:
27624
diff
changeset
|
97 |
// This is only relevant for current GC alloc regions so we keep a time stamp |
7d50f95e0076
8065358: Refactor G1s usage of save_marks and reduce related races
mgerdin
parents:
27624
diff
changeset
|
98 |
// per region to determine if the region has been allocated during the current |
7d50f95e0076
8065358: Refactor G1s usage of save_marks and reduce related races
mgerdin
parents:
27624
diff
changeset
|
99 |
// GC or not. If the time stamp is current we report a scan_top value which |
7d50f95e0076
8065358: Refactor G1s usage of save_marks and reduce related races
mgerdin
parents:
27624
diff
changeset
|
100 |
// was saved at the end of the previous GC for retained alloc regions and which is |
7d50f95e0076
8065358: Refactor G1s usage of save_marks and reduce related races
mgerdin
parents:
27624
diff
changeset
|
101 |
// equal to the bottom for all other regions. |
7d50f95e0076
8065358: Refactor G1s usage of save_marks and reduce related races
mgerdin
parents:
27624
diff
changeset
|
102 |
// There is a race between card scanners and allocating gc workers where we must ensure |
7d50f95e0076
8065358: Refactor G1s usage of save_marks and reduce related races
mgerdin
parents:
27624
diff
changeset
|
103 |
// that card scanners do not read the memory allocated by the gc workers. |
7d50f95e0076
8065358: Refactor G1s usage of save_marks and reduce related races
mgerdin
parents:
27624
diff
changeset
|
104 |
// In order to enforce that, we must not return a value of _top which is more recent than the |
7d50f95e0076
8065358: Refactor G1s usage of save_marks and reduce related races
mgerdin
parents:
27624
diff
changeset
|
105 |
// time stamp. This is due to the fact that a region may become a gc alloc region at |
7d50f95e0076
8065358: Refactor G1s usage of save_marks and reduce related races
mgerdin
parents:
27624
diff
changeset
|
106 |
// some point after we've read the timestamp value as being < the current time stamp. |
7d50f95e0076
8065358: Refactor G1s usage of save_marks and reduce related races
mgerdin
parents:
27624
diff
changeset
|
107 |
// The time stamps are re-initialized to zero at cleanup and at Full GCs. |
7d50f95e0076
8065358: Refactor G1s usage of save_marks and reduce related races
mgerdin
parents:
27624
diff
changeset
|
108 |
// The current scheme that uses sequential unsigned ints will fail only if we have 4b |
1374 | 109 |
// evacuation pauses between two cleanups, which is _highly_ unlikely. |
25481
1427aa24638c
8047818: G1 HeapRegions can no longer be ContiguousSpaces
mgerdin
parents:
25479
diff
changeset
|
110 |
class G1OffsetTableContigSpace: public CompactibleSpace { |
1374 | 111 |
friend class VMStructs; |
32389
626f27450e12
8067336: Allow that PLAB allocations at the end of regions are flexible
tschatzl
parents:
32185
diff
changeset
|
112 |
HeapWord* volatile _top; |
27889
7d50f95e0076
8065358: Refactor G1s usage of save_marks and reduce related races
mgerdin
parents:
27624
diff
changeset
|
113 |
HeapWord* volatile _scan_top; |
1374 | 114 |
protected: |
115 |
G1BlockOffsetArrayContigSpace _offsets; |
|
116 |
Mutex _par_alloc_lock; |
|
117 |
volatile unsigned _gc_time_stamp; |
|
8928
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8680
diff
changeset
|
118 |
// When we need to retire an allocation region, while other threads |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8680
diff
changeset
|
119 |
// are also concurrently trying to allocate into it, we typically |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8680
diff
changeset
|
120 |
// allocate a dummy object at the end of the region to ensure that |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8680
diff
changeset
|
121 |
// no more allocations can take place in it. However, sometimes we |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8680
diff
changeset
|
122 |
// want to know where the end of the last "real" object we allocated |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8680
diff
changeset
|
123 |
// into the region was and this is what this keeps track. |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8680
diff
changeset
|
124 |
HeapWord* _pre_dummy_top; |
1374 | 125 |
|
126 |
public: |
|
127 |
G1OffsetTableContigSpace(G1BlockOffsetSharedArray* sharedOffsetArray, |
|
13756
3b72f3da8cd4
7016955: G1: remove the is_zeroed parameter from the HeapRegion constructor
johnc
parents:
13728
diff
changeset
|
128 |
MemRegion mr); |
1374 | 129 |
|
25481
1427aa24638c
8047818: G1 HeapRegions can no longer be ContiguousSpaces
mgerdin
parents:
25479
diff
changeset
|
130 |
void set_top(HeapWord* value) { _top = value; } |
1427aa24638c
8047818: G1 HeapRegions can no longer be ContiguousSpaces
mgerdin
parents:
25479
diff
changeset
|
131 |
HeapWord* top() const { return _top; } |
1427aa24638c
8047818: G1 HeapRegions can no longer be ContiguousSpaces
mgerdin
parents:
25479
diff
changeset
|
132 |
|
1427aa24638c
8047818: G1 HeapRegions can no longer be ContiguousSpaces
mgerdin
parents:
25479
diff
changeset
|
133 |
protected: |
26157
70eddb655686
8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data
tschatzl
parents:
25492
diff
changeset
|
134 |
// Reset the G1OffsetTableContigSpace. |
70eddb655686
8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data
tschatzl
parents:
25492
diff
changeset
|
135 |
virtual void initialize(MemRegion mr, bool clear_space, bool mangle_space); |
70eddb655686
8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data
tschatzl
parents:
25492
diff
changeset
|
136 |
|
32389
626f27450e12
8067336: Allow that PLAB allocations at the end of regions are flexible
tschatzl
parents:
32185
diff
changeset
|
137 |
HeapWord* volatile* top_addr() { return &_top; } |
626f27450e12
8067336: Allow that PLAB allocations at the end of regions are flexible
tschatzl
parents:
32185
diff
changeset
|
138 |
// Try to allocate at least min_word_size and up to desired_size from this Space. |
626f27450e12
8067336: Allow that PLAB allocations at the end of regions are flexible
tschatzl
parents:
32185
diff
changeset
|
139 |
// Returns NULL if not possible, otherwise sets actual_word_size to the amount of |
626f27450e12
8067336: Allow that PLAB allocations at the end of regions are flexible
tschatzl
parents:
32185
diff
changeset
|
140 |
// space allocated. |
626f27450e12
8067336: Allow that PLAB allocations at the end of regions are flexible
tschatzl
parents:
32185
diff
changeset
|
141 |
// This version assumes that all allocation requests to this Space are properly |
626f27450e12
8067336: Allow that PLAB allocations at the end of regions are flexible
tschatzl
parents:
32185
diff
changeset
|
142 |
// synchronized. |
626f27450e12
8067336: Allow that PLAB allocations at the end of regions are flexible
tschatzl
parents:
32185
diff
changeset
|
143 |
inline HeapWord* allocate_impl(size_t min_word_size, size_t desired_word_size, size_t* actual_word_size); |
626f27450e12
8067336: Allow that PLAB allocations at the end of regions are flexible
tschatzl
parents:
32185
diff
changeset
|
144 |
// Try to allocate at least min_word_size and up to desired_size from this Space. |
626f27450e12
8067336: Allow that PLAB allocations at the end of regions are flexible
tschatzl
parents:
32185
diff
changeset
|
145 |
// Returns NULL if not possible, otherwise sets actual_word_size to the amount of |
626f27450e12
8067336: Allow that PLAB allocations at the end of regions are flexible
tschatzl
parents:
32185
diff
changeset
|
146 |
// space allocated. |
626f27450e12
8067336: Allow that PLAB allocations at the end of regions are flexible
tschatzl
parents:
32185
diff
changeset
|
147 |
// This version synchronizes with other calls to par_allocate_impl(). |
626f27450e12
8067336: Allow that PLAB allocations at the end of regions are flexible
tschatzl
parents:
32185
diff
changeset
|
148 |
inline HeapWord* par_allocate_impl(size_t min_word_size, size_t desired_word_size, size_t* actual_word_size); |
25481
1427aa24638c
8047818: G1 HeapRegions can no longer be ContiguousSpaces
mgerdin
parents:
25479
diff
changeset
|
149 |
|
1427aa24638c
8047818: G1 HeapRegions can no longer be ContiguousSpaces
mgerdin
parents:
25479
diff
changeset
|
150 |
public: |
1427aa24638c
8047818: G1 HeapRegions can no longer be ContiguousSpaces
mgerdin
parents:
25479
diff
changeset
|
151 |
void reset_after_compaction() { set_top(compaction_top()); } |
1427aa24638c
8047818: G1 HeapRegions can no longer be ContiguousSpaces
mgerdin
parents:
25479
diff
changeset
|
152 |
|
1427aa24638c
8047818: G1 HeapRegions can no longer be ContiguousSpaces
mgerdin
parents:
25479
diff
changeset
|
153 |
size_t used() const { return byte_size(bottom(), top()); } |
1427aa24638c
8047818: G1 HeapRegions can no longer be ContiguousSpaces
mgerdin
parents:
25479
diff
changeset
|
154 |
size_t free() const { return byte_size(top(), end()); } |
1427aa24638c
8047818: G1 HeapRegions can no longer be ContiguousSpaces
mgerdin
parents:
25479
diff
changeset
|
155 |
bool is_free_block(const HeapWord* p) const { return p >= top(); } |
1427aa24638c
8047818: G1 HeapRegions can no longer be ContiguousSpaces
mgerdin
parents:
25479
diff
changeset
|
156 |
|
1427aa24638c
8047818: G1 HeapRegions can no longer be ContiguousSpaces
mgerdin
parents:
25479
diff
changeset
|
157 |
MemRegion used_region() const { return MemRegion(bottom(), top()); } |
1427aa24638c
8047818: G1 HeapRegions can no longer be ContiguousSpaces
mgerdin
parents:
25479
diff
changeset
|
158 |
|
1427aa24638c
8047818: G1 HeapRegions can no longer be ContiguousSpaces
mgerdin
parents:
25479
diff
changeset
|
159 |
void object_iterate(ObjectClosure* blk); |
1427aa24638c
8047818: G1 HeapRegions can no longer be ContiguousSpaces
mgerdin
parents:
25479
diff
changeset
|
160 |
void safe_object_iterate(ObjectClosure* blk); |
1427aa24638c
8047818: G1 HeapRegions can no longer be ContiguousSpaces
mgerdin
parents:
25479
diff
changeset
|
161 |
|
1374 | 162 |
void set_bottom(HeapWord* value); |
163 |
void set_end(HeapWord* value); |
|
164 |
||
29681 | 165 |
void mangle_unused_area() PRODUCT_RETURN; |
166 |
void mangle_unused_area_complete() PRODUCT_RETURN; |
|
167 |
||
27889
7d50f95e0076
8065358: Refactor G1s usage of save_marks and reduce related races
mgerdin
parents:
27624
diff
changeset
|
168 |
HeapWord* scan_top() const; |
7d50f95e0076
8065358: Refactor G1s usage of save_marks and reduce related races
mgerdin
parents:
27624
diff
changeset
|
169 |
void record_timestamp(); |
1374 | 170 |
void reset_gc_time_stamp() { _gc_time_stamp = 0; } |
13336
e582172ff6ff
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
12508
diff
changeset
|
171 |
unsigned get_gc_time_stamp() { return _gc_time_stamp; } |
27889
7d50f95e0076
8065358: Refactor G1s usage of save_marks and reduce related races
mgerdin
parents:
27624
diff
changeset
|
172 |
void record_retained_region(); |
1374 | 173 |
|
8928
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8680
diff
changeset
|
174 |
// See the comment above in the declaration of _pre_dummy_top for an |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8680
diff
changeset
|
175 |
// explanation of what it is. |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8680
diff
changeset
|
176 |
void set_pre_dummy_top(HeapWord* pre_dummy_top) { |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8680
diff
changeset
|
177 |
assert(is_in(pre_dummy_top) && pre_dummy_top <= top(), "pre-condition"); |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8680
diff
changeset
|
178 |
_pre_dummy_top = pre_dummy_top; |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8680
diff
changeset
|
179 |
} |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8680
diff
changeset
|
180 |
HeapWord* pre_dummy_top() { |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8680
diff
changeset
|
181 |
return (_pre_dummy_top == NULL) ? top() : _pre_dummy_top; |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8680
diff
changeset
|
182 |
} |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8680
diff
changeset
|
183 |
void reset_pre_dummy_top() { _pre_dummy_top = NULL; } |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8680
diff
changeset
|
184 |
|
1388 | 185 |
virtual void clear(bool mangle_space); |
1374 | 186 |
|
187 |
HeapWord* block_start(const void* p); |
|
188 |
HeapWord* block_start_const(const void* p) const; |
|
189 |
||
32389
626f27450e12
8067336: Allow that PLAB allocations at the end of regions are flexible
tschatzl
parents:
32185
diff
changeset
|
190 |
// Allocation (return NULL if full). Assumes the caller has established |
626f27450e12
8067336: Allow that PLAB allocations at the end of regions are flexible
tschatzl
parents:
32185
diff
changeset
|
191 |
// mutually exclusive access to the space. |
626f27450e12
8067336: Allow that PLAB allocations at the end of regions are flexible
tschatzl
parents:
32185
diff
changeset
|
192 |
HeapWord* allocate(size_t min_word_size, size_t desired_word_size, size_t* actual_word_size); |
626f27450e12
8067336: Allow that PLAB allocations at the end of regions are flexible
tschatzl
parents:
32185
diff
changeset
|
193 |
// Allocation (return NULL if full). Enforces mutual exclusion internally. |
626f27450e12
8067336: Allow that PLAB allocations at the end of regions are flexible
tschatzl
parents:
32185
diff
changeset
|
194 |
HeapWord* par_allocate(size_t min_word_size, size_t desired_word_size, size_t* actual_word_size); |
626f27450e12
8067336: Allow that PLAB allocations at the end of regions are flexible
tschatzl
parents:
32185
diff
changeset
|
195 |
|
1374 | 196 |
virtual HeapWord* allocate(size_t word_size); |
32389
626f27450e12
8067336: Allow that PLAB allocations at the end of regions are flexible
tschatzl
parents:
32185
diff
changeset
|
197 |
virtual HeapWord* par_allocate(size_t word_size); |
1374 | 198 |
|
27889
7d50f95e0076
8065358: Refactor G1s usage of save_marks and reduce related races
mgerdin
parents:
27624
diff
changeset
|
199 |
HeapWord* saved_mark_word() const { ShouldNotReachHere(); return NULL; } |
7d50f95e0076
8065358: Refactor G1s usage of save_marks and reduce related races
mgerdin
parents:
27624
diff
changeset
|
200 |
|
1374 | 201 |
// MarkSweep support phase3 |
202 |
virtual HeapWord* initialize_threshold(); |
|
203 |
virtual HeapWord* cross_threshold(HeapWord* start, HeapWord* end); |
|
204 |
||
205 |
virtual void print() const; |
|
7904
e90e097fced4
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
7397
diff
changeset
|
206 |
|
e90e097fced4
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
7397
diff
changeset
|
207 |
void reset_bot() { |
26157
70eddb655686
8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data
tschatzl
parents:
25492
diff
changeset
|
208 |
_offsets.reset_bot(); |
7904
e90e097fced4
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
7397
diff
changeset
|
209 |
} |
e90e097fced4
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
7397
diff
changeset
|
210 |
|
e90e097fced4
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
7397
diff
changeset
|
211 |
void print_bot_on(outputStream* out) { |
e90e097fced4
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
7397
diff
changeset
|
212 |
_offsets.print_on(out); |
e90e097fced4
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
7397
diff
changeset
|
213 |
} |
1374 | 214 |
}; |
215 |
||
216 |
class HeapRegion: public G1OffsetTableContigSpace { |
|
217 |
friend class VMStructs; |
|
27624
fe43edc5046d
8043243: convert SCAN_AND_FORWARD, SCAN_AND_ADJUST_POINTERS, SCAN_AND_COMPACT macros to methods
mlarsson
parents:
27009
diff
changeset
|
218 |
// Allow scan_and_forward to call (private) overrides for auxiliary functions on this class |
fe43edc5046d
8043243: convert SCAN_AND_FORWARD, SCAN_AND_ADJUST_POINTERS, SCAN_AND_COMPACT macros to methods
mlarsson
parents:
27009
diff
changeset
|
219 |
template <typename SpaceType> |
fe43edc5046d
8043243: convert SCAN_AND_FORWARD, SCAN_AND_ADJUST_POINTERS, SCAN_AND_COMPACT macros to methods
mlarsson
parents:
27009
diff
changeset
|
220 |
friend void CompactibleSpace::scan_and_forward(SpaceType* space, CompactPoint* cp); |
1374 | 221 |
private: |
222 |
||
223 |
// The remembered set for this region. |
|
224 |
// (Might want to make this "inline" later, to avoid some alloc failure |
|
225 |
// issues.) |
|
226 |
HeapRegionRemSet* _rem_set; |
|
227 |
||
228 |
G1BlockOffsetArrayContigSpace* offsets() { return &_offsets; } |
|
229 |
||
27624
fe43edc5046d
8043243: convert SCAN_AND_FORWARD, SCAN_AND_ADJUST_POINTERS, SCAN_AND_COMPACT macros to methods
mlarsson
parents:
27009
diff
changeset
|
230 |
// Auxiliary functions for scan_and_forward support. |
fe43edc5046d
8043243: convert SCAN_AND_FORWARD, SCAN_AND_ADJUST_POINTERS, SCAN_AND_COMPACT macros to methods
mlarsson
parents:
27009
diff
changeset
|
231 |
// See comments for CompactibleSpace for more information. |
fe43edc5046d
8043243: convert SCAN_AND_FORWARD, SCAN_AND_ADJUST_POINTERS, SCAN_AND_COMPACT macros to methods
mlarsson
parents:
27009
diff
changeset
|
232 |
inline HeapWord* scan_limit() const { |
fe43edc5046d
8043243: convert SCAN_AND_FORWARD, SCAN_AND_ADJUST_POINTERS, SCAN_AND_COMPACT macros to methods
mlarsson
parents:
27009
diff
changeset
|
233 |
return top(); |
fe43edc5046d
8043243: convert SCAN_AND_FORWARD, SCAN_AND_ADJUST_POINTERS, SCAN_AND_COMPACT macros to methods
mlarsson
parents:
27009
diff
changeset
|
234 |
} |
fe43edc5046d
8043243: convert SCAN_AND_FORWARD, SCAN_AND_ADJUST_POINTERS, SCAN_AND_COMPACT macros to methods
mlarsson
parents:
27009
diff
changeset
|
235 |
|
fe43edc5046d
8043243: convert SCAN_AND_FORWARD, SCAN_AND_ADJUST_POINTERS, SCAN_AND_COMPACT macros to methods
mlarsson
parents:
27009
diff
changeset
|
236 |
inline bool scanned_block_is_obj(const HeapWord* addr) const { |
fe43edc5046d
8043243: convert SCAN_AND_FORWARD, SCAN_AND_ADJUST_POINTERS, SCAN_AND_COMPACT macros to methods
mlarsson
parents:
27009
diff
changeset
|
237 |
return true; // Always true, since scan_limit is top |
fe43edc5046d
8043243: convert SCAN_AND_FORWARD, SCAN_AND_ADJUST_POINTERS, SCAN_AND_COMPACT macros to methods
mlarsson
parents:
27009
diff
changeset
|
238 |
} |
fe43edc5046d
8043243: convert SCAN_AND_FORWARD, SCAN_AND_ADJUST_POINTERS, SCAN_AND_COMPACT macros to methods
mlarsson
parents:
27009
diff
changeset
|
239 |
|
fe43edc5046d
8043243: convert SCAN_AND_FORWARD, SCAN_AND_ADJUST_POINTERS, SCAN_AND_COMPACT macros to methods
mlarsson
parents:
27009
diff
changeset
|
240 |
inline size_t scanned_block_size(const HeapWord* addr) const { |
fe43edc5046d
8043243: convert SCAN_AND_FORWARD, SCAN_AND_ADJUST_POINTERS, SCAN_AND_COMPACT macros to methods
mlarsson
parents:
27009
diff
changeset
|
241 |
return HeapRegion::block_size(addr); // Avoid virtual call |
fe43edc5046d
8043243: convert SCAN_AND_FORWARD, SCAN_AND_ADJUST_POINTERS, SCAN_AND_COMPACT macros to methods
mlarsson
parents:
27009
diff
changeset
|
242 |
} |
fe43edc5046d
8043243: convert SCAN_AND_FORWARD, SCAN_AND_ADJUST_POINTERS, SCAN_AND_COMPACT macros to methods
mlarsson
parents:
27009
diff
changeset
|
243 |
|
1374 | 244 |
protected: |
9989 | 245 |
// The index of this region in the heap region sequence. |
26316
93f6b40c038b
8054819: Rename HeapRegionSeq to HeapRegionManager
tschatzl
parents:
26157
diff
changeset
|
246 |
uint _hrm_index; |
1374 | 247 |
|
26837
72a43d3841e7
8057536: Refactor G1 to allow context specific allocations
sjohanss
parents:
26827
diff
changeset
|
248 |
AllocationContext_t _allocation_context; |
72a43d3841e7
8057536: Refactor G1 to allow context specific allocations
sjohanss
parents:
26827
diff
changeset
|
249 |
|
26696
623a25e6c686
8057768: Make heap region region type in G1 HeapRegion explicit
tonyp
parents:
26422
diff
changeset
|
250 |
HeapRegionType _type; |
623a25e6c686
8057768: Make heap region region type in G1 HeapRegion explicit
tonyp
parents:
26422
diff
changeset
|
251 |
|
1374 | 252 |
// For a humongous region, region in which it starts. |
253 |
HeapRegion* _humongous_start_region; |
|
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 |
|
25492
d27050bdfb04
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
25491
diff
changeset
|
259 |
// represented as linked lists through the field below. Currently, there |
d27050bdfb04
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
25491
diff
changeset
|
260 |
// is only one set: |
1374 | 261 |
// The collection set. |
262 |
HeapRegion* _next_in_special_set; |
|
263 |
||
264 |
// next region in the young "generation" region set |
|
265 |
HeapRegion* _next_young_region; |
|
266 |
||
2883
406d1e6d1aa1
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
2344
diff
changeset
|
267 |
// Next region whose cards need cleaning |
406d1e6d1aa1
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
2344
diff
changeset
|
268 |
HeapRegion* _next_dirty_cards_region; |
406d1e6d1aa1
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
2344
diff
changeset
|
269 |
|
7923 | 270 |
// Fields used by the HeapRegionSetBase class and subclasses. |
271 |
HeapRegion* _next; |
|
23471
ec9427262f0a
8036025: Sort the freelist in order to shrink the heap
jwilhelm
parents:
23453
diff
changeset
|
272 |
HeapRegion* _prev; |
7923 | 273 |
#ifdef ASSERT |
274 |
HeapRegionSetBase* _containing_set; |
|
275 |
#endif // ASSERT |
|
276 |
||
1374 | 277 |
// We use concurrent marking to determine the amount of live data |
278 |
// in each heap region. |
|
279 |
size_t _prev_marked_bytes; // Bytes known to be live via last completed marking. |
|
280 |
size_t _next_marked_bytes; // Bytes known to be live via in-progress marking. |
|
281 |
||
12382
6aaecb1cbfe1
7145441: G1: collection set chooser-related cleanup
tonyp
parents:
12381
diff
changeset
|
282 |
// The calculated GC efficiency of the region. |
1374 | 283 |
double _gc_efficiency; |
284 |
||
285 |
int _young_index_in_cset; |
|
286 |
SurvRateGroup* _surv_rate_group; |
|
287 |
int _age_index; |
|
288 |
||
289 |
// The start of the unmarked area. The unmarked area extends from this |
|
290 |
// word until the top and/or end of the region, and is the part |
|
291 |
// of the region for which no marking was done, i.e. objects may |
|
292 |
// have been allocated in this part since the last mark phase. |
|
293 |
// "prev" is the top at the start of the last completed marking. |
|
294 |
// "next" is the top at the start of the in-progress marking (if any.) |
|
295 |
HeapWord* _prev_top_at_mark_start; |
|
296 |
HeapWord* _next_top_at_mark_start; |
|
297 |
// If a collection pause is in progress, this is the top at the start |
|
298 |
// of that pause. |
|
299 |
||
300 |
void init_top_at_mark_start() { |
|
301 |
assert(_prev_marked_bytes == 0 && |
|
302 |
_next_marked_bytes == 0, |
|
303 |
"Must be called after zero_marked_bytes."); |
|
304 |
HeapWord* bot = bottom(); |
|
305 |
_prev_top_at_mark_start = bot; |
|
306 |
_next_top_at_mark_start = bot; |
|
307 |
} |
|
308 |
||
5350
cccf0925702e
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
4024
diff
changeset
|
309 |
// Cached attributes used in the collection set policy information |
cccf0925702e
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
4024
diff
changeset
|
310 |
|
cccf0925702e
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
4024
diff
changeset
|
311 |
// The RSet length that was added to the total value |
cccf0925702e
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
4024
diff
changeset
|
312 |
// for the collection set. |
cccf0925702e
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
4024
diff
changeset
|
313 |
size_t _recorded_rs_length; |
cccf0925702e
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
4024
diff
changeset
|
314 |
|
cccf0925702e
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
4024
diff
changeset
|
315 |
// The predicted elapsed time that was added to total value |
cccf0925702e
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
4024
diff
changeset
|
316 |
// for the collection set. |
cccf0925702e
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
4024
diff
changeset
|
317 |
double _predicted_elapsed_time_ms; |
cccf0925702e
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
4024
diff
changeset
|
318 |
|
cccf0925702e
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
4024
diff
changeset
|
319 |
// The predicted number of bytes to copy that was added to |
cccf0925702e
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
4024
diff
changeset
|
320 |
// the total value for the collection set. |
cccf0925702e
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
4024
diff
changeset
|
321 |
size_t _predicted_bytes_to_copy; |
cccf0925702e
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
4024
diff
changeset
|
322 |
|
1374 | 323 |
public: |
26316
93f6b40c038b
8054819: Rename HeapRegionSeq to HeapRegionManager
tschatzl
parents:
26157
diff
changeset
|
324 |
HeapRegion(uint hrm_index, |
9989 | 325 |
G1BlockOffsetSharedArray* sharedOffsetArray, |
26839 | 326 |
MemRegion mr); |
1374 | 327 |
|
26157
70eddb655686
8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data
tschatzl
parents:
25492
diff
changeset
|
328 |
// Initializing the HeapRegion not only resets the data structure, but also |
70eddb655686
8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data
tschatzl
parents:
25492
diff
changeset
|
329 |
// resets the BOT for that heap region. |
70eddb655686
8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data
tschatzl
parents:
25492
diff
changeset
|
330 |
// The default values for clear_space means that we will do the clearing if |
70eddb655686
8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data
tschatzl
parents:
25492
diff
changeset
|
331 |
// there's clearing to be done ourselves. We also always mangle the space. |
70eddb655686
8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data
tschatzl
parents:
25492
diff
changeset
|
332 |
virtual void initialize(MemRegion mr, bool clear_space = false, bool mangle_space = SpaceDecorator::Mangle); |
70eddb655686
8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data
tschatzl
parents:
25492
diff
changeset
|
333 |
|
10677
370a8da2d63f
7095194: G1: HeapRegion::GrainBytes, GrainWords, and CardsPerRegion should be size_t
johnc
parents:
10671
diff
changeset
|
334 |
static int LogOfHRGrainBytes; |
370a8da2d63f
7095194: G1: HeapRegion::GrainBytes, GrainWords, and CardsPerRegion should be size_t
johnc
parents:
10671
diff
changeset
|
335 |
static int LogOfHRGrainWords; |
370a8da2d63f
7095194: G1: HeapRegion::GrainBytes, GrainWords, and CardsPerRegion should be size_t
johnc
parents:
10671
diff
changeset
|
336 |
|
370a8da2d63f
7095194: G1: HeapRegion::GrainBytes, GrainWords, and CardsPerRegion should be size_t
johnc
parents:
10671
diff
changeset
|
337 |
static size_t GrainBytes; |
370a8da2d63f
7095194: G1: HeapRegion::GrainBytes, GrainWords, and CardsPerRegion should be size_t
johnc
parents:
10671
diff
changeset
|
338 |
static size_t GrainWords; |
370a8da2d63f
7095194: G1: HeapRegion::GrainBytes, GrainWords, and CardsPerRegion should be size_t
johnc
parents:
10671
diff
changeset
|
339 |
static size_t CardsPerRegion; |
3697
ea9211aa02f5
6819085: G1: use larger and/or user settable region size
tonyp
parents:
3000
diff
changeset
|
340 |
|
10671
431ff8629f97
7075646: G1: fix inconsistencies in the monitoring data
tonyp
parents:
10670
diff
changeset
|
341 |
static size_t align_up_to_region_byte_size(size_t sz) { |
431ff8629f97
7075646: G1: fix inconsistencies in the monitoring data
tonyp
parents:
10670
diff
changeset
|
342 |
return (sz + (size_t) GrainBytes - 1) & |
431ff8629f97
7075646: G1: fix inconsistencies in the monitoring data
tonyp
parents:
10670
diff
changeset
|
343 |
~((1 << (size_t) LogOfHRGrainBytes) - 1); |
431ff8629f97
7075646: G1: fix inconsistencies in the monitoring data
tonyp
parents:
10670
diff
changeset
|
344 |
} |
431ff8629f97
7075646: G1: fix inconsistencies in the monitoring data
tonyp
parents:
10670
diff
changeset
|
345 |
|
19986
33d188c66ed9
8010722: assert: failed: heap size is too big for compressed oops
tschatzl
parents:
19728
diff
changeset
|
346 |
static size_t max_region_size(); |
31346
a70d45c06136
8042668: GC Support for shared heap ranges in CDS
jiangli
parents:
30764
diff
changeset
|
347 |
static size_t min_region_size_in_words(); |
19986
33d188c66ed9
8010722: assert: failed: heap size is too big for compressed oops
tschatzl
parents:
19728
diff
changeset
|
348 |
|
3697
ea9211aa02f5
6819085: G1: use larger and/or user settable region size
tonyp
parents:
3000
diff
changeset
|
349 |
// It sets up the heap region size (GrainBytes / GrainWords), as |
ea9211aa02f5
6819085: G1: use larger and/or user settable region size
tonyp
parents:
3000
diff
changeset
|
350 |
// well as other related fields that are based on the heap region |
ea9211aa02f5
6819085: G1: use larger and/or user settable region size
tonyp
parents:
3000
diff
changeset
|
351 |
// size (LogOfHRGrainBytes / LogOfHRGrainWords / |
ea9211aa02f5
6819085: G1: use larger and/or user settable region size
tonyp
parents:
3000
diff
changeset
|
352 |
// CardsPerRegion). All those fields are considered constant |
ea9211aa02f5
6819085: G1: use larger and/or user settable region size
tonyp
parents:
3000
diff
changeset
|
353 |
// throughout the JVM's execution, therefore they should only be set |
ea9211aa02f5
6819085: G1: use larger and/or user settable region size
tonyp
parents:
3000
diff
changeset
|
354 |
// up once during initialization time. |
19728
9e1556506d2d
8019902: G1: Use the average heap size rather than the minimum heap size to calculate the region size
brutisso
parents:
19339
diff
changeset
|
355 |
static void setup_heap_region_size(size_t initial_heap_size, size_t max_heap_size); |
1374 | 356 |
|
25481
1427aa24638c
8047818: G1 HeapRegions can no longer be ContiguousSpaces
mgerdin
parents:
25479
diff
changeset
|
357 |
// All allocated blocks are occupied by objects in a HeapRegion |
1427aa24638c
8047818: G1 HeapRegions can no longer be ContiguousSpaces
mgerdin
parents:
25479
diff
changeset
|
358 |
bool block_is_obj(const HeapWord* p) const; |
1427aa24638c
8047818: G1 HeapRegions can no longer be ContiguousSpaces
mgerdin
parents:
25479
diff
changeset
|
359 |
|
1427aa24638c
8047818: G1 HeapRegions can no longer be ContiguousSpaces
mgerdin
parents:
25479
diff
changeset
|
360 |
// Returns the object size for all valid block starts |
1427aa24638c
8047818: G1 HeapRegions can no longer be ContiguousSpaces
mgerdin
parents:
25479
diff
changeset
|
361 |
// and the amount of unallocated words if called on top() |
1427aa24638c
8047818: G1 HeapRegions can no longer be ContiguousSpaces
mgerdin
parents:
25479
diff
changeset
|
362 |
size_t block_size(const HeapWord* p) const; |
1427aa24638c
8047818: G1 HeapRegions can no longer be ContiguousSpaces
mgerdin
parents:
25479
diff
changeset
|
363 |
|
27624
fe43edc5046d
8043243: convert SCAN_AND_FORWARD, SCAN_AND_ADJUST_POINTERS, SCAN_AND_COMPACT macros to methods
mlarsson
parents:
27009
diff
changeset
|
364 |
// Override for scan_and_forward support. |
fe43edc5046d
8043243: convert SCAN_AND_FORWARD, SCAN_AND_ADJUST_POINTERS, SCAN_AND_COMPACT macros to methods
mlarsson
parents:
27009
diff
changeset
|
365 |
void prepare_for_compaction(CompactPoint* cp); |
fe43edc5046d
8043243: convert SCAN_AND_FORWARD, SCAN_AND_ADJUST_POINTERS, SCAN_AND_COMPACT macros to methods
mlarsson
parents:
27009
diff
changeset
|
366 |
|
32389
626f27450e12
8067336: Allow that PLAB allocations at the end of regions are flexible
tschatzl
parents:
32185
diff
changeset
|
367 |
inline HeapWord* par_allocate_no_bot_updates(size_t min_word_size, size_t desired_word_size, size_t* word_size); |
25481
1427aa24638c
8047818: G1 HeapRegions can no longer be ContiguousSpaces
mgerdin
parents:
25479
diff
changeset
|
368 |
inline HeapWord* allocate_no_bot_updates(size_t word_size); |
32389
626f27450e12
8067336: Allow that PLAB allocations at the end of regions are flexible
tschatzl
parents:
32185
diff
changeset
|
369 |
inline HeapWord* allocate_no_bot_updates(size_t min_word_size, size_t desired_word_size, size_t* actual_size); |
7905
cc7740616b03
6994297: G1: do first-level slow-path allocations with a CAS
tonyp
parents:
7904
diff
changeset
|
370 |
|
26316
93f6b40c038b
8054819: Rename HeapRegionSeq to HeapRegionManager
tschatzl
parents:
26157
diff
changeset
|
371 |
// If this region is a member of a HeapRegionManager, the index in that |
1374 | 372 |
// sequence, otherwise -1. |
26316
93f6b40c038b
8054819: Rename HeapRegionSeq to HeapRegionManager
tschatzl
parents:
26157
diff
changeset
|
373 |
uint hrm_index() const { return _hrm_index; } |
1374 | 374 |
|
375 |
// The number of bytes marked live in the region in the last marking phase. |
|
376 |
size_t marked_bytes() { return _prev_marked_bytes; } |
|
8930
52368505ee8e
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
8928
diff
changeset
|
377 |
size_t live_bytes() { |
52368505ee8e
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
8928
diff
changeset
|
378 |
return (top() - prev_top_at_mark_start()) * HeapWordSize + marked_bytes(); |
52368505ee8e
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
8928
diff
changeset
|
379 |
} |
52368505ee8e
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
8928
diff
changeset
|
380 |
|
1374 | 381 |
// The number of bytes counted in the next marking. |
382 |
size_t next_marked_bytes() { return _next_marked_bytes; } |
|
383 |
// The number of bytes live wrt the next marking. |
|
384 |
size_t next_live_bytes() { |
|
8930
52368505ee8e
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
8928
diff
changeset
|
385 |
return |
52368505ee8e
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
8928
diff
changeset
|
386 |
(top() - next_top_at_mark_start()) * HeapWordSize + next_marked_bytes(); |
1374 | 387 |
} |
388 |
||
389 |
// A lower bound on the amount of garbage bytes in the region. |
|
390 |
size_t garbage_bytes() { |
|
391 |
size_t used_at_mark_start_bytes = |
|
392 |
(prev_top_at_mark_start() - bottom()) * HeapWordSize; |
|
393 |
assert(used_at_mark_start_bytes >= marked_bytes(), |
|
394 |
"Can't mark more than we have."); |
|
395 |
return used_at_mark_start_bytes - marked_bytes(); |
|
396 |
} |
|
397 |
||
11756
28b6fe22e43d
7132029: G1: mixed GC phase lasts for longer than it should
tonyp
parents:
11583
diff
changeset
|
398 |
// Return the amount of bytes we'll reclaim if we collect this |
28b6fe22e43d
7132029: G1: mixed GC phase lasts for longer than it should
tonyp
parents:
11583
diff
changeset
|
399 |
// region. This includes not only the known garbage bytes in the |
28b6fe22e43d
7132029: G1: mixed GC phase lasts for longer than it should
tonyp
parents:
11583
diff
changeset
|
400 |
// region but also any unallocated space in it, i.e., [top, end), |
28b6fe22e43d
7132029: G1: mixed GC phase lasts for longer than it should
tonyp
parents:
11583
diff
changeset
|
401 |
// since it will also be reclaimed if we collect the region. |
28b6fe22e43d
7132029: G1: mixed GC phase lasts for longer than it should
tonyp
parents:
11583
diff
changeset
|
402 |
size_t reclaimable_bytes() { |
28b6fe22e43d
7132029: G1: mixed GC phase lasts for longer than it should
tonyp
parents:
11583
diff
changeset
|
403 |
size_t known_live_bytes = live_bytes(); |
28b6fe22e43d
7132029: G1: mixed GC phase lasts for longer than it should
tonyp
parents:
11583
diff
changeset
|
404 |
assert(known_live_bytes <= capacity(), "sanity"); |
28b6fe22e43d
7132029: G1: mixed GC phase lasts for longer than it should
tonyp
parents:
11583
diff
changeset
|
405 |
return capacity() - known_live_bytes; |
28b6fe22e43d
7132029: G1: mixed GC phase lasts for longer than it should
tonyp
parents:
11583
diff
changeset
|
406 |
} |
28b6fe22e43d
7132029: G1: mixed GC phase lasts for longer than it should
tonyp
parents:
11583
diff
changeset
|
407 |
|
1374 | 408 |
// An upper bound on the number of live bytes in the region. |
409 |
size_t max_live_bytes() { return used() - garbage_bytes(); } |
|
410 |
||
411 |
void add_to_marked_bytes(size_t incr_bytes) { |
|
412 |
_next_marked_bytes = _next_marked_bytes + incr_bytes; |
|
11172
f720721985ba
7111795: G1: Various cleanups identified during walk through of changes for 6484965
johnc
parents:
10770
diff
changeset
|
413 |
assert(_next_marked_bytes <= used(), "invariant" ); |
1374 | 414 |
} |
415 |
||
416 |
void zero_marked_bytes() { |
|
417 |
_prev_marked_bytes = _next_marked_bytes = 0; |
|
418 |
} |
|
419 |
||
26696
623a25e6c686
8057768: Make heap region region type in G1 HeapRegion explicit
tonyp
parents:
26422
diff
changeset
|
420 |
const char* get_type_str() const { return _type.get_str(); } |
623a25e6c686
8057768: Make heap region region type in G1 HeapRegion explicit
tonyp
parents:
26422
diff
changeset
|
421 |
const char* get_short_type_str() const { return _type.get_short_str(); } |
623a25e6c686
8057768: Make heap region region type in G1 HeapRegion explicit
tonyp
parents:
26422
diff
changeset
|
422 |
|
623a25e6c686
8057768: Make heap region region type in G1 HeapRegion explicit
tonyp
parents:
26422
diff
changeset
|
423 |
bool is_free() const { return _type.is_free(); } |
623a25e6c686
8057768: Make heap region region type in G1 HeapRegion explicit
tonyp
parents:
26422
diff
changeset
|
424 |
|
623a25e6c686
8057768: Make heap region region type in G1 HeapRegion explicit
tonyp
parents:
26422
diff
changeset
|
425 |
bool is_young() const { return _type.is_young(); } |
623a25e6c686
8057768: Make heap region region type in G1 HeapRegion explicit
tonyp
parents:
26422
diff
changeset
|
426 |
bool is_eden() const { return _type.is_eden(); } |
623a25e6c686
8057768: Make heap region region type in G1 HeapRegion explicit
tonyp
parents:
26422
diff
changeset
|
427 |
bool is_survivor() const { return _type.is_survivor(); } |
623a25e6c686
8057768: Make heap region region type in G1 HeapRegion explicit
tonyp
parents:
26422
diff
changeset
|
428 |
|
26846
7d4376f8560e
8058495: G1: normalize names for isHumongous() and friends
tonyp
parents:
26839
diff
changeset
|
429 |
bool is_humongous() const { return _type.is_humongous(); } |
7d4376f8560e
8058495: G1: normalize names for isHumongous() and friends
tonyp
parents:
26839
diff
changeset
|
430 |
bool is_starts_humongous() const { return _type.is_starts_humongous(); } |
7d4376f8560e
8058495: G1: normalize names for isHumongous() and friends
tonyp
parents:
26839
diff
changeset
|
431 |
bool is_continues_humongous() const { return _type.is_continues_humongous(); } |
26696
623a25e6c686
8057768: Make heap region region type in G1 HeapRegion explicit
tonyp
parents:
26422
diff
changeset
|
432 |
|
623a25e6c686
8057768: Make heap region region type in G1 HeapRegion explicit
tonyp
parents:
26422
diff
changeset
|
433 |
bool is_old() const { return _type.is_old(); } |
623a25e6c686
8057768: Make heap region region type in G1 HeapRegion explicit
tonyp
parents:
26422
diff
changeset
|
434 |
|
31346
a70d45c06136
8042668: GC Support for shared heap ranges in CDS
jiangli
parents:
30764
diff
changeset
|
435 |
// A pinned region contains objects which are not moved by garbage collections. |
a70d45c06136
8042668: GC Support for shared heap ranges in CDS
jiangli
parents:
30764
diff
changeset
|
436 |
// Humongous regions and archive regions are pinned. |
a70d45c06136
8042668: GC Support for shared heap ranges in CDS
jiangli
parents:
30764
diff
changeset
|
437 |
bool is_pinned() const { return _type.is_pinned(); } |
a70d45c06136
8042668: GC Support for shared heap ranges in CDS
jiangli
parents:
30764
diff
changeset
|
438 |
|
a70d45c06136
8042668: GC Support for shared heap ranges in CDS
jiangli
parents:
30764
diff
changeset
|
439 |
// An archive region is a pinned region, also tagged as old, which |
a70d45c06136
8042668: GC Support for shared heap ranges in CDS
jiangli
parents:
30764
diff
changeset
|
440 |
// should not be marked during mark/sweep. This allows the address |
a70d45c06136
8042668: GC Support for shared heap ranges in CDS
jiangli
parents:
30764
diff
changeset
|
441 |
// space to be shared by JVM instances. |
a70d45c06136
8042668: GC Support for shared heap ranges in CDS
jiangli
parents:
30764
diff
changeset
|
442 |
bool is_archive() const { return _type.is_archive(); } |
a70d45c06136
8042668: GC Support for shared heap ranges in CDS
jiangli
parents:
30764
diff
changeset
|
443 |
|
1374 | 444 |
// For a humongous region, region in which it starts. |
445 |
HeapRegion* humongous_start_region() const { |
|
446 |
return _humongous_start_region; |
|
447 |
} |
|
448 |
||
13336
e582172ff6ff
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
12508
diff
changeset
|
449 |
// Return the number of distinct regions that are covered by this region: |
e582172ff6ff
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
12508
diff
changeset
|
450 |
// 1 if the region is not humongous, >= 1 if the region is humongous. |
e582172ff6ff
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
12508
diff
changeset
|
451 |
uint region_num() const { |
26846
7d4376f8560e
8058495: G1: normalize names for isHumongous() and friends
tonyp
parents:
26839
diff
changeset
|
452 |
if (!is_humongous()) { |
13336
e582172ff6ff
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
12508
diff
changeset
|
453 |
return 1U; |
e582172ff6ff
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
12508
diff
changeset
|
454 |
} else { |
26846
7d4376f8560e
8058495: G1: normalize names for isHumongous() and friends
tonyp
parents:
26839
diff
changeset
|
455 |
assert(is_starts_humongous(), "doesn't make sense on HC regions"); |
13336
e582172ff6ff
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
12508
diff
changeset
|
456 |
assert(capacity() % HeapRegion::GrainBytes == 0, "sanity"); |
e582172ff6ff
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
12508
diff
changeset
|
457 |
return (uint) (capacity() >> HeapRegion::LogOfHRGrainBytes); |
e582172ff6ff
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
12508
diff
changeset
|
458 |
} |
e582172ff6ff
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
12508
diff
changeset
|
459 |
} |
e582172ff6ff
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
12508
diff
changeset
|
460 |
|
e582172ff6ff
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
12508
diff
changeset
|
461 |
// Return the index + 1 of the last HC regions that's associated |
e582172ff6ff
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
12508
diff
changeset
|
462 |
// with this HS region. |
e582172ff6ff
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
12508
diff
changeset
|
463 |
uint last_hc_index() const { |
26846
7d4376f8560e
8058495: G1: normalize names for isHumongous() and friends
tonyp
parents:
26839
diff
changeset
|
464 |
assert(is_starts_humongous(), "don't call this otherwise"); |
26316
93f6b40c038b
8054819: Rename HeapRegionSeq to HeapRegionManager
tschatzl
parents:
26157
diff
changeset
|
465 |
return hrm_index() + region_num(); |
13336
e582172ff6ff
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
12508
diff
changeset
|
466 |
} |
e582172ff6ff
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
12508
diff
changeset
|
467 |
|
10767
4ce4a9b10523
7097516: G1: assert(0<= from_card && from_card<HeapRegion::CardsPerRegion) failed: Must be in range.
brutisso
parents:
10677
diff
changeset
|
468 |
// Same as Space::is_in_reserved, but will use the original size of the region. |
4ce4a9b10523
7097516: G1: assert(0<= from_card && from_card<HeapRegion::CardsPerRegion) failed: Must be in range.
brutisso
parents:
10677
diff
changeset
|
469 |
// The original size is different only for start humongous regions. They get |
4ce4a9b10523
7097516: G1: assert(0<= from_card && from_card<HeapRegion::CardsPerRegion) failed: Must be in range.
brutisso
parents:
10677
diff
changeset
|
470 |
// their _end set up to be the end of the last continues region of the |
4ce4a9b10523
7097516: G1: assert(0<= from_card && from_card<HeapRegion::CardsPerRegion) failed: Must be in range.
brutisso
parents:
10677
diff
changeset
|
471 |
// corresponding humongous object. |
4ce4a9b10523
7097516: G1: assert(0<= from_card && from_card<HeapRegion::CardsPerRegion) failed: Must be in range.
brutisso
parents:
10677
diff
changeset
|
472 |
bool is_in_reserved_raw(const void* p) const { |
26827 | 473 |
return _bottom <= p && p < orig_end(); |
10767
4ce4a9b10523
7097516: G1: assert(0<= from_card && from_card<HeapRegion::CardsPerRegion) failed: Must be in range.
brutisso
parents:
10677
diff
changeset
|
474 |
} |
4ce4a9b10523
7097516: G1: assert(0<= from_card && from_card<HeapRegion::CardsPerRegion) failed: Must be in range.
brutisso
parents:
10677
diff
changeset
|
475 |
|
7904
e90e097fced4
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
7397
diff
changeset
|
476 |
// Makes the current region be a "starts humongous" region, i.e., |
e90e097fced4
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
7397
diff
changeset
|
477 |
// the first region in a series of one or more contiguous regions |
e90e097fced4
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
7397
diff
changeset
|
478 |
// that will contain a single "humongous" object. The two parameters |
e90e097fced4
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
7397
diff
changeset
|
479 |
// are as follows: |
e90e097fced4
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
7397
diff
changeset
|
480 |
// |
e90e097fced4
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
7397
diff
changeset
|
481 |
// new_top : The new value of the top field of this region which |
e90e097fced4
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
7397
diff
changeset
|
482 |
// points to the end of the humongous object that's being |
e90e097fced4
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
7397
diff
changeset
|
483 |
// allocated. If there is more than one region in the series, top |
e90e097fced4
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
7397
diff
changeset
|
484 |
// will lie beyond this region's original end field and on the last |
e90e097fced4
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
7397
diff
changeset
|
485 |
// region in the series. |
e90e097fced4
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
7397
diff
changeset
|
486 |
// |
e90e097fced4
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
7397
diff
changeset
|
487 |
// new_end : The new value of the end field of this region which |
e90e097fced4
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
7397
diff
changeset
|
488 |
// points to the end of the last region in the series. If there is |
e90e097fced4
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
7397
diff
changeset
|
489 |
// one region in the series (namely: this one) end will be the same |
e90e097fced4
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
7397
diff
changeset
|
490 |
// as the original end of this region. |
e90e097fced4
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
7397
diff
changeset
|
491 |
// |
e90e097fced4
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
7397
diff
changeset
|
492 |
// Updating top and end as described above makes this region look as |
e90e097fced4
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
7397
diff
changeset
|
493 |
// if it spans the entire space taken up by all the regions in the |
e90e097fced4
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
7397
diff
changeset
|
494 |
// series and an single allocation moved its top to new_top. This |
e90e097fced4
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
7397
diff
changeset
|
495 |
// ensures that the space (capacity / allocated) taken up by all |
e90e097fced4
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
7397
diff
changeset
|
496 |
// humongous regions can be calculated by just looking at the |
e90e097fced4
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
7397
diff
changeset
|
497 |
// "starts humongous" regions and by ignoring the "continues |
e90e097fced4
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
7397
diff
changeset
|
498 |
// humongous" regions. |
26846
7d4376f8560e
8058495: G1: normalize names for isHumongous() and friends
tonyp
parents:
26839
diff
changeset
|
499 |
void set_starts_humongous(HeapWord* new_top, HeapWord* new_end); |
1374 | 500 |
|
7904
e90e097fced4
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
7397
diff
changeset
|
501 |
// Makes the current region be a "continues humongous' |
e90e097fced4
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
7397
diff
changeset
|
502 |
// region. first_hr is the "start humongous" region of the series |
e90e097fced4
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
7397
diff
changeset
|
503 |
// which this region will be part of. |
26846
7d4376f8560e
8058495: G1: normalize names for isHumongous() and friends
tonyp
parents:
26839
diff
changeset
|
504 |
void set_continues_humongous(HeapRegion* first_hr); |
1374 | 505 |
|
7923 | 506 |
// Unsets the humongous-related fields on the region. |
26696
623a25e6c686
8057768: Make heap region region type in G1 HeapRegion explicit
tonyp
parents:
26422
diff
changeset
|
507 |
void clear_humongous(); |
7923 | 508 |
|
1374 | 509 |
// If the region has a remembered set, return a pointer to it. |
510 |
HeapRegionRemSet* rem_set() const { |
|
511 |
return _rem_set; |
|
512 |
} |
|
513 |
||
32185
49a57ff2c3cb
8073052: Rename and clean up the allocation manager hierarchy in g1Allocator.?pp
tschatzl
parents:
31592
diff
changeset
|
514 |
inline bool in_collection_set() const; |
29470
e34bbcd36e53
8030646: track collection set membership in one place
ehelin
parents:
28207
diff
changeset
|
515 |
|
32185
49a57ff2c3cb
8073052: Rename and clean up the allocation manager hierarchy in g1Allocator.?pp
tschatzl
parents:
31592
diff
changeset
|
516 |
inline HeapRegion* next_in_collection_set() const; |
49a57ff2c3cb
8073052: Rename and clean up the allocation manager hierarchy in g1Allocator.?pp
tschatzl
parents:
31592
diff
changeset
|
517 |
inline void set_next_in_collection_set(HeapRegion* r); |
1374 | 518 |
|
26837
72a43d3841e7
8057536: Refactor G1 to allow context specific allocations
sjohanss
parents:
26827
diff
changeset
|
519 |
void set_allocation_context(AllocationContext_t context) { |
72a43d3841e7
8057536: Refactor G1 to allow context specific allocations
sjohanss
parents:
26827
diff
changeset
|
520 |
_allocation_context = context; |
72a43d3841e7
8057536: Refactor G1 to allow context specific allocations
sjohanss
parents:
26827
diff
changeset
|
521 |
} |
72a43d3841e7
8057536: Refactor G1 to allow context specific allocations
sjohanss
parents:
26827
diff
changeset
|
522 |
|
72a43d3841e7
8057536: Refactor G1 to allow context specific allocations
sjohanss
parents:
26827
diff
changeset
|
523 |
AllocationContext_t allocation_context() const { |
72a43d3841e7
8057536: Refactor G1 to allow context specific allocations
sjohanss
parents:
26827
diff
changeset
|
524 |
return _allocation_context; |
72a43d3841e7
8057536: Refactor G1 to allow context specific allocations
sjohanss
parents:
26827
diff
changeset
|
525 |
} |
72a43d3841e7
8057536: Refactor G1 to allow context specific allocations
sjohanss
parents:
26827
diff
changeset
|
526 |
|
7923 | 527 |
// Methods used by the HeapRegionSetBase class and subclasses. |
1374 | 528 |
|
23471
ec9427262f0a
8036025: Sort the freelist in order to shrink the heap
jwilhelm
parents:
23453
diff
changeset
|
529 |
// Getter and setter for the next and prev fields used to link regions into |
7923 | 530 |
// linked lists. |
531 |
HeapRegion* next() { return _next; } |
|
23471
ec9427262f0a
8036025: Sort the freelist in order to shrink the heap
jwilhelm
parents:
23453
diff
changeset
|
532 |
HeapRegion* prev() { return _prev; } |
7923 | 533 |
|
534 |
void set_next(HeapRegion* next) { _next = next; } |
|
23471
ec9427262f0a
8036025: Sort the freelist in order to shrink the heap
jwilhelm
parents:
23453
diff
changeset
|
535 |
void set_prev(HeapRegion* prev) { _prev = prev; } |
1374 | 536 |
|
7923 | 537 |
// Every region added to a set is tagged with a reference to that |
538 |
// set. This is used for doing consistency checking to make sure that |
|
539 |
// the contents of a set are as they should be and it's only |
|
540 |
// available in non-product builds. |
|
541 |
#ifdef ASSERT |
|
542 |
void set_containing_set(HeapRegionSetBase* containing_set) { |
|
543 |
assert((containing_set == NULL && _containing_set != NULL) || |
|
544 |
(containing_set != NULL && _containing_set == NULL), |
|
33105
294e48b4f704
8080775: Better argument formatting for assert() and friends
david
parents:
32389
diff
changeset
|
545 |
"containing_set: " PTR_FORMAT " " |
294e48b4f704
8080775: Better argument formatting for assert() and friends
david
parents:
32389
diff
changeset
|
546 |
"_containing_set: " PTR_FORMAT, |
294e48b4f704
8080775: Better argument formatting for assert() and friends
david
parents:
32389
diff
changeset
|
547 |
p2i(containing_set), p2i(_containing_set)); |
7923 | 548 |
|
549 |
_containing_set = containing_set; |
|
8680 | 550 |
} |
1374 | 551 |
|
7923 | 552 |
HeapRegionSetBase* containing_set() { return _containing_set; } |
553 |
#else // ASSERT |
|
554 |
void set_containing_set(HeapRegionSetBase* containing_set) { } |
|
1374 | 555 |
|
8680 | 556 |
// containing_set() is only used in asserts so there's no reason |
7923 | 557 |
// to provide a dummy version of it. |
558 |
#endif // ASSERT |
|
1374 | 559 |
|
560 |
HeapRegion* get_next_young_region() { return _next_young_region; } |
|
561 |
void set_next_young_region(HeapRegion* hr) { |
|
562 |
_next_young_region = hr; |
|
563 |
} |
|
564 |
||
2883
406d1e6d1aa1
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
2344
diff
changeset
|
565 |
HeapRegion* get_next_dirty_cards_region() const { return _next_dirty_cards_region; } |
406d1e6d1aa1
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
2344
diff
changeset
|
566 |
HeapRegion** next_dirty_cards_region_addr() { return &_next_dirty_cards_region; } |
406d1e6d1aa1
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
2344
diff
changeset
|
567 |
void set_next_dirty_cards_region(HeapRegion* hr) { _next_dirty_cards_region = hr; } |
406d1e6d1aa1
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
2344
diff
changeset
|
568 |
bool is_on_dirty_cards_region_list() const { return get_next_dirty_cards_region() != NULL; } |
406d1e6d1aa1
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
2344
diff
changeset
|
569 |
|
26827 | 570 |
// For the start region of a humongous sequence, it's original end(). |
571 |
HeapWord* orig_end() const { return _bottom + GrainWords; } |
|
9989 | 572 |
|
1374 | 573 |
// Reset HR stuff to default values. |
23453
09cfb0164acf
8027295: Free CSet takes ~50% of young pause time
tschatzl
parents:
19986
diff
changeset
|
574 |
void hr_clear(bool par, bool clear_space, bool locked = false); |
9418
32a87dd6b746
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
8930
diff
changeset
|
575 |
void par_clear(); |
1374 | 576 |
|
577 |
// Get the start of the unmarked area in this region. |
|
578 |
HeapWord* prev_top_at_mark_start() const { return _prev_top_at_mark_start; } |
|
579 |
HeapWord* next_top_at_mark_start() const { return _next_top_at_mark_start; } |
|
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 |
||
11455
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11451
diff
changeset
|
585 |
// Notify the region that concurrent marking is starting. Initialize |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11451
diff
changeset
|
586 |
// all fields related to the next marking info. |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11451
diff
changeset
|
587 |
inline void note_start_of_marking(); |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11451
diff
changeset
|
588 |
|
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11451
diff
changeset
|
589 |
// Notify the region that concurrent marking has finished. Copy the |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11451
diff
changeset
|
590 |
// (now finalized) next marking info fields into the prev marking |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11451
diff
changeset
|
591 |
// info fields. |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11451
diff
changeset
|
592 |
inline void note_end_of_marking(); |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11451
diff
changeset
|
593 |
|
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11451
diff
changeset
|
594 |
// Notify the region that it will be used as to-space during a GC |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11451
diff
changeset
|
595 |
// and we are about to start copying objects into it. |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11451
diff
changeset
|
596 |
inline void note_start_of_copying(bool during_initial_mark); |
1374 | 597 |
|
11455
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11451
diff
changeset
|
598 |
// Notify the region that it ceases being to-space during a GC and |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11451
diff
changeset
|
599 |
// we will not copy objects into it any more. |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11451
diff
changeset
|
600 |
inline void note_end_of_copying(bool during_initial_mark); |
1374 | 601 |
|
11455
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11451
diff
changeset
|
602 |
// Notify the region that we are about to start processing |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11451
diff
changeset
|
603 |
// self-forwarded objects during evac failure handling. |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11451
diff
changeset
|
604 |
void note_self_forwarding_removal_start(bool during_initial_mark, |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11451
diff
changeset
|
605 |
bool during_conc_mark); |
1374 | 606 |
|
11455
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11451
diff
changeset
|
607 |
// Notify the region that we have finished processing self-forwarded |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11451
diff
changeset
|
608 |
// objects during evac failure handling. |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11451
diff
changeset
|
609 |
void note_self_forwarding_removal_end(bool during_initial_mark, |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11451
diff
changeset
|
610 |
bool during_conc_mark, |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11451
diff
changeset
|
611 |
size_t marked_bytes); |
1374 | 612 |
|
613 |
// Returns "false" iff no object in the region was allocated when the |
|
614 |
// last mark phase ended. |
|
615 |
bool is_marked() { return _prev_top_at_mark_start != bottom(); } |
|
616 |
||
617 |
void reset_during_compaction() { |
|
26846
7d4376f8560e
8058495: G1: normalize names for isHumongous() and friends
tonyp
parents:
26839
diff
changeset
|
618 |
assert(is_starts_humongous(), |
13336
e582172ff6ff
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
12508
diff
changeset
|
619 |
"should only be called for starts humongous regions"); |
1374 | 620 |
|
621 |
zero_marked_bytes(); |
|
622 |
init_top_at_mark_start(); |
|
623 |
} |
|
624 |
||
625 |
void calc_gc_efficiency(void); |
|
626 |
double gc_efficiency() { return _gc_efficiency;} |
|
627 |
||
628 |
int young_index_in_cset() const { return _young_index_in_cset; } |
|
629 |
void set_young_index_in_cset(int index) { |
|
630 |
assert( (index == -1) || is_young(), "pre-condition" ); |
|
631 |
_young_index_in_cset = index; |
|
632 |
} |
|
633 |
||
634 |
int age_in_surv_rate_group() { |
|
635 |
assert( _surv_rate_group != NULL, "pre-condition" ); |
|
636 |
assert( _age_index > -1, "pre-condition" ); |
|
637 |
return _surv_rate_group->age_in_group(_age_index); |
|
638 |
} |
|
639 |
||
640 |
void record_surv_words_in_group(size_t words_survived) { |
|
641 |
assert( _surv_rate_group != NULL, "pre-condition" ); |
|
642 |
assert( _age_index > -1, "pre-condition" ); |
|
643 |
int age_in_group = age_in_surv_rate_group(); |
|
644 |
_surv_rate_group->record_surviving_words(age_in_group, words_survived); |
|
645 |
} |
|
646 |
||
647 |
int age_in_surv_rate_group_cond() { |
|
648 |
if (_surv_rate_group != NULL) |
|
649 |
return age_in_surv_rate_group(); |
|
650 |
else |
|
651 |
return -1; |
|
652 |
} |
|
653 |
||
654 |
SurvRateGroup* surv_rate_group() { |
|
655 |
return _surv_rate_group; |
|
656 |
} |
|
657 |
||
658 |
void install_surv_rate_group(SurvRateGroup* surv_rate_group) { |
|
659 |
assert( surv_rate_group != NULL, "pre-condition" ); |
|
660 |
assert( _surv_rate_group == NULL, "pre-condition" ); |
|
661 |
assert( is_young(), "pre-condition" ); |
|
662 |
||
663 |
_surv_rate_group = surv_rate_group; |
|
664 |
_age_index = surv_rate_group->next_age_index(); |
|
665 |
} |
|
666 |
||
667 |
void uninstall_surv_rate_group() { |
|
668 |
if (_surv_rate_group != NULL) { |
|
669 |
assert( _age_index > -1, "pre-condition" ); |
|
670 |
assert( is_young(), "pre-condition" ); |
|
671 |
||
672 |
_surv_rate_group = NULL; |
|
673 |
_age_index = -1; |
|
674 |
} else { |
|
675 |
assert( _age_index == -1, "pre-condition" ); |
|
676 |
} |
|
677 |
} |
|
678 |
||
26696
623a25e6c686
8057768: Make heap region region type in G1 HeapRegion explicit
tonyp
parents:
26422
diff
changeset
|
679 |
void set_free() { _type.set_free(); } |
1374 | 680 |
|
26696
623a25e6c686
8057768: Make heap region region type in G1 HeapRegion explicit
tonyp
parents:
26422
diff
changeset
|
681 |
void set_eden() { _type.set_eden(); } |
623a25e6c686
8057768: Make heap region region type in G1 HeapRegion explicit
tonyp
parents:
26422
diff
changeset
|
682 |
void set_eden_pre_gc() { _type.set_eden_pre_gc(); } |
623a25e6c686
8057768: Make heap region region type in G1 HeapRegion explicit
tonyp
parents:
26422
diff
changeset
|
683 |
void set_survivor() { _type.set_survivor(); } |
1374 | 684 |
|
26696
623a25e6c686
8057768: Make heap region region type in G1 HeapRegion explicit
tonyp
parents:
26422
diff
changeset
|
685 |
void set_old() { _type.set_old(); } |
1374 | 686 |
|
31346
a70d45c06136
8042668: GC Support for shared heap ranges in CDS
jiangli
parents:
30764
diff
changeset
|
687 |
void set_archive() { _type.set_archive(); } |
a70d45c06136
8042668: GC Support for shared heap ranges in CDS
jiangli
parents:
30764
diff
changeset
|
688 |
|
1374 | 689 |
// Determine if an object has been allocated since the last |
690 |
// mark performed by the collector. This returns true iff the object |
|
691 |
// is within the unmarked area of the region. |
|
692 |
bool obj_allocated_since_prev_marking(oop obj) const { |
|
693 |
return (HeapWord *) obj >= prev_top_at_mark_start(); |
|
694 |
} |
|
695 |
bool obj_allocated_since_next_marking(oop obj) const { |
|
696 |
return (HeapWord *) obj >= next_top_at_mark_start(); |
|
697 |
} |
|
698 |
||
699 |
// Returns the "evacuation_failed" property of the region. |
|
700 |
bool evacuation_failed() { return _evacuation_failed; } |
|
701 |
||
702 |
// Sets the "evacuation_failed" property of the region. |
|
703 |
void set_evacuation_failed(bool b) { |
|
704 |
_evacuation_failed = b; |
|
705 |
||
706 |
if (b) { |
|
707 |
_next_marked_bytes = 0; |
|
708 |
} |
|
709 |
} |
|
710 |
||
711 |
// Requires that "mr" be entirely within the region. |
|
712 |
// Apply "cl->do_object" to all objects that intersect with "mr". |
|
713 |
// If the iteration encounters an unparseable portion of the region, |
|
714 |
// or if "cl->abort()" is true after a closure application, |
|
715 |
// terminate the iteration and return the address of the start of the |
|
716 |
// subregion that isn't done. (The two can be distinguished by querying |
|
717 |
// "cl->abort()".) Return of "NULL" indicates that the iteration |
|
718 |
// completed. |
|
719 |
HeapWord* |
|
720 |
object_iterate_mem_careful(MemRegion mr, ObjectClosure* cl); |
|
721 |
||
9418
32a87dd6b746
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
8930
diff
changeset
|
722 |
// filter_young: if true and the region is a young region then we |
32a87dd6b746
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
8930
diff
changeset
|
723 |
// skip the iteration. |
32a87dd6b746
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
8930
diff
changeset
|
724 |
// card_ptr: if not NULL, and we decide that the card is not young |
32a87dd6b746
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
8930
diff
changeset
|
725 |
// and we iterate over it, we'll clean the card before we start the |
32a87dd6b746
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
8930
diff
changeset
|
726 |
// iteration. |
1374 | 727 |
HeapWord* |
728 |
oops_on_card_seq_iterate_careful(MemRegion mr, |
|
6068
80ef41e75a2d
6956639: G1: assert(cached_ptr != card_ptr) failed: shouldn't be, concurrentG1Refine.cpp:307
johnc
parents:
5547
diff
changeset
|
729 |
FilterOutOfRegionClosure* cl, |
9418
32a87dd6b746
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
8930
diff
changeset
|
730 |
bool filter_young, |
32a87dd6b746
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
8930
diff
changeset
|
731 |
jbyte* card_ptr); |
1374 | 732 |
|
5350
cccf0925702e
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
4024
diff
changeset
|
733 |
size_t recorded_rs_length() const { return _recorded_rs_length; } |
cccf0925702e
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
4024
diff
changeset
|
734 |
double predicted_elapsed_time_ms() const { return _predicted_elapsed_time_ms; } |
cccf0925702e
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
4024
diff
changeset
|
735 |
size_t predicted_bytes_to_copy() const { return _predicted_bytes_to_copy; } |
cccf0925702e
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
4024
diff
changeset
|
736 |
|
cccf0925702e
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
4024
diff
changeset
|
737 |
void set_recorded_rs_length(size_t rs_length) { |
cccf0925702e
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
4024
diff
changeset
|
738 |
_recorded_rs_length = rs_length; |
cccf0925702e
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
4024
diff
changeset
|
739 |
} |
cccf0925702e
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
4024
diff
changeset
|
740 |
|
cccf0925702e
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
4024
diff
changeset
|
741 |
void set_predicted_elapsed_time_ms(double ms) { |
cccf0925702e
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
4024
diff
changeset
|
742 |
_predicted_elapsed_time_ms = ms; |
cccf0925702e
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
4024
diff
changeset
|
743 |
} |
cccf0925702e
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
4024
diff
changeset
|
744 |
|
cccf0925702e
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
4024
diff
changeset
|
745 |
void set_predicted_bytes_to_copy(size_t bytes) { |
cccf0925702e
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
4024
diff
changeset
|
746 |
_predicted_bytes_to_copy = bytes; |
cccf0925702e
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
4024
diff
changeset
|
747 |
} |
cccf0925702e
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
4024
diff
changeset
|
748 |
|
13336
e582172ff6ff
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
12508
diff
changeset
|
749 |
virtual CompactibleSpace* next_compaction_space() const; |
1374 | 750 |
|
751 |
virtual void reset_after_compaction(); |
|
752 |
||
19339 | 753 |
// Routines for managing a list of code roots (attached to the |
754 |
// this region's RSet) that point into this heap region. |
|
755 |
void add_strong_code_root(nmethod* nm); |
|
26422 | 756 |
void add_strong_code_root_locked(nmethod* nm); |
19339 | 757 |
void remove_strong_code_root(nmethod* nm); |
758 |
||
759 |
// Applies blk->do_code_blob() to each of the entries in |
|
760 |
// the strong code roots list for this region |
|
761 |
void strong_code_roots_do(CodeBlobClosure* blk) const; |
|
762 |
||
763 |
// Verify that the entries on the strong code root list for this |
|
764 |
// region are live and include at least one pointer into this region. |
|
765 |
void verify_strong_code_roots(VerifyOption vo, bool* failures) const; |
|
766 |
||
1374 | 767 |
void print() const; |
768 |
void print_on(outputStream* st) const; |
|
769 |
||
9995
290620c08233
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
9989
diff
changeset
|
770 |
// vo == UsePrevMarking -> use "prev" marking information, |
290620c08233
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
9989
diff
changeset
|
771 |
// vo == UseNextMarking -> use "next" marking information |
290620c08233
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
9989
diff
changeset
|
772 |
// vo == UseMarkWord -> use the mark word in the object header |
290620c08233
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
9989
diff
changeset
|
773 |
// |
3000 | 774 |
// NOTE: Only the "prev" marking information is guaranteed to be |
775 |
// consistent most of the time, so most calls to this should use |
|
9995
290620c08233
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
9989
diff
changeset
|
776 |
// vo == UsePrevMarking. |
290620c08233
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
9989
diff
changeset
|
777 |
// Currently, there is only one case where this is called with |
290620c08233
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
9989
diff
changeset
|
778 |
// vo == UseNextMarking, which is to verify the "next" marking |
290620c08233
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
9989
diff
changeset
|
779 |
// information at the end of remark. |
290620c08233
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
9989
diff
changeset
|
780 |
// Currently there is only one place where this is called with |
290620c08233
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
9989
diff
changeset
|
781 |
// vo == UseMarkWord, which is to verify the marking during a |
290620c08233
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
9989
diff
changeset
|
782 |
// full GC. |
12379 | 783 |
void verify(VerifyOption vo, bool *failures) const; |
3000 | 784 |
|
785 |
// Override; it uses the "prev" marking information |
|
12379 | 786 |
virtual void verify() const; |
1374 | 787 |
}; |
788 |
||
789 |
// HeapRegionClosure is used for iterating over regions. |
|
790 |
// Terminates the iteration when the "doHeapRegion" method returns "true". |
|
791 |
class HeapRegionClosure : public StackObj { |
|
26316
93f6b40c038b
8054819: Rename HeapRegionSeq to HeapRegionManager
tschatzl
parents:
26157
diff
changeset
|
792 |
friend class HeapRegionManager; |
1374 | 793 |
friend class G1CollectedHeap; |
794 |
||
795 |
bool _complete; |
|
796 |
void incomplete() { _complete = false; } |
|
797 |
||
798 |
public: |
|
799 |
HeapRegionClosure(): _complete(true) {} |
|
800 |
||
801 |
// Typically called on each region until it returns true. |
|
802 |
virtual bool doHeapRegion(HeapRegion* r) = 0; |
|
803 |
||
804 |
// True after iteration if the closure was applied to all heap regions |
|
805 |
// and returned "false" in all cases. |
|
806 |
bool complete() { return _complete; } |
|
807 |
}; |
|
808 |
||
30764 | 809 |
#endif // SHARE_VM_GC_G1_HEAPREGION_HPP |