Mercurial > hg > truffle
annotate src/share/vm/gc_implementation/g1/g1CollectorPolicy.hpp @ 20211:82693fb204a5
8038930: G1CodeRootSet::test fails with assert(_num_chunks_handed_out == 0) failed: No elements must have been handed out yet
Summary: The test incorrectly assumed that it had been started with no other previous compilation activity. Fix this by allowing multiple code root free chunk lists, and use one separate from the global one to perform the test.
Reviewed-by: brutisso
author | tschatzl |
---|---|
date | Wed, 16 Apr 2014 10:14:50 +0200 |
parents | cfd4aac53239 |
children | 52b4284cb496 c02ec279b062 |
rev | line source |
---|---|
342 | 1 /* |
10098
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
8681
diff
changeset
|
2 * Copyright (c) 2001, 2013, Oracle and/or its affiliates. All rights reserved. |
342 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
4 * | |
5 * This code is free software; you can redistribute it and/or modify it | |
6 * under the terms of the GNU General Public License version 2 only, as | |
7 * published by the Free Software Foundation. | |
8 * | |
9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
12 * version 2 for more details (a copy is included in the LICENSE file that | |
13 * accompanied this code). | |
14 * | |
15 * You should have received a copy of the GNU General Public License version | |
16 * 2 along with this work; if not, write to the Free Software Foundation, | |
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
18 * | |
1552
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
trims
parents:
1394
diff
changeset
|
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
trims
parents:
1394
diff
changeset
|
20 * or visit www.oracle.com if you need additional information or have any |
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
trims
parents:
1394
diff
changeset
|
21 * questions. |
342 | 22 * |
23 */ | |
24 | |
1972 | 25 #ifndef SHARE_VM_GC_IMPLEMENTATION_G1_G1COLLECTORPOLICY_HPP |
26 #define SHARE_VM_GC_IMPLEMENTATION_G1_G1COLLECTORPOLICY_HPP | |
27 | |
28 #include "gc_implementation/g1/collectionSetChooser.hpp" | |
29 #include "gc_implementation/g1/g1MMUTracker.hpp" | |
30 #include "memory/collectorPolicy.hpp" | |
31 | |
342 | 32 // A G1CollectorPolicy makes policy decisions that determine the |
33 // characteristics of the collector. Examples include: | |
34 // * choice of collection set. | |
35 // * when to collect. | |
36 | |
37 class HeapRegion; | |
38 class CollectionSetChooser; | |
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6109
diff
changeset
|
39 class G1GCPhaseTimes; |
342 | 40 |
6109
bbc900c2482a
7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering
brutisso
parents:
6059
diff
changeset
|
41 // TraceGen0Time collects data on _both_ young and mixed evacuation pauses |
bbc900c2482a
7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering
brutisso
parents:
6059
diff
changeset
|
42 // (the latter may contain non-young regions - i.e. regions that are |
bbc900c2482a
7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering
brutisso
parents:
6059
diff
changeset
|
43 // technically in Gen1) while TraceGen1Time collects data about full GCs. |
6197 | 44 class TraceGen0TimeData : public CHeapObj<mtGC> { |
6109
bbc900c2482a
7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering
brutisso
parents:
6059
diff
changeset
|
45 private: |
bbc900c2482a
7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering
brutisso
parents:
6059
diff
changeset
|
46 unsigned _young_pause_num; |
bbc900c2482a
7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering
brutisso
parents:
6059
diff
changeset
|
47 unsigned _mixed_pause_num; |
bbc900c2482a
7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering
brutisso
parents:
6059
diff
changeset
|
48 |
bbc900c2482a
7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering
brutisso
parents:
6059
diff
changeset
|
49 NumberSeq _all_stop_world_times_ms; |
bbc900c2482a
7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering
brutisso
parents:
6059
diff
changeset
|
50 NumberSeq _all_yield_times_ms; |
342 | 51 |
6109
bbc900c2482a
7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering
brutisso
parents:
6059
diff
changeset
|
52 NumberSeq _total; |
bbc900c2482a
7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering
brutisso
parents:
6059
diff
changeset
|
53 NumberSeq _other; |
bbc900c2482a
7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering
brutisso
parents:
6059
diff
changeset
|
54 NumberSeq _root_region_scan_wait; |
bbc900c2482a
7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering
brutisso
parents:
6059
diff
changeset
|
55 NumberSeq _parallel; |
bbc900c2482a
7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering
brutisso
parents:
6059
diff
changeset
|
56 NumberSeq _ext_root_scan; |
bbc900c2482a
7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering
brutisso
parents:
6059
diff
changeset
|
57 NumberSeq _satb_filtering; |
bbc900c2482a
7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering
brutisso
parents:
6059
diff
changeset
|
58 NumberSeq _update_rs; |
bbc900c2482a
7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering
brutisso
parents:
6059
diff
changeset
|
59 NumberSeq _scan_rs; |
bbc900c2482a
7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering
brutisso
parents:
6059
diff
changeset
|
60 NumberSeq _obj_copy; |
bbc900c2482a
7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering
brutisso
parents:
6059
diff
changeset
|
61 NumberSeq _termination; |
bbc900c2482a
7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering
brutisso
parents:
6059
diff
changeset
|
62 NumberSeq _parallel_other; |
bbc900c2482a
7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering
brutisso
parents:
6059
diff
changeset
|
63 NumberSeq _clear_ct; |
342 | 64 |
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6109
diff
changeset
|
65 void print_summary(const char* str, const NumberSeq* seq) const; |
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6109
diff
changeset
|
66 void print_summary_sd(const char* str, const NumberSeq* seq) const; |
342 | 67 |
68 public: | |
6109
bbc900c2482a
7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering
brutisso
parents:
6059
diff
changeset
|
69 TraceGen0TimeData() : _young_pause_num(0), _mixed_pause_num(0) {}; |
bbc900c2482a
7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering
brutisso
parents:
6059
diff
changeset
|
70 void record_start_collection(double time_to_stop_the_world_ms); |
bbc900c2482a
7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering
brutisso
parents:
6059
diff
changeset
|
71 void record_yield_time(double yield_time_ms); |
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6109
diff
changeset
|
72 void record_end_collection(double pause_time_ms, G1GCPhaseTimes* phase_times); |
6109
bbc900c2482a
7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering
brutisso
parents:
6059
diff
changeset
|
73 void increment_young_collection_count(); |
bbc900c2482a
7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering
brutisso
parents:
6059
diff
changeset
|
74 void increment_mixed_collection_count(); |
bbc900c2482a
7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering
brutisso
parents:
6059
diff
changeset
|
75 void print() const; |
342 | 76 }; |
77 | |
6197 | 78 class TraceGen1TimeData : public CHeapObj<mtGC> { |
6109
bbc900c2482a
7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering
brutisso
parents:
6059
diff
changeset
|
79 private: |
bbc900c2482a
7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering
brutisso
parents:
6059
diff
changeset
|
80 NumberSeq _all_full_gc_times; |
342 | 81 |
6109
bbc900c2482a
7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering
brutisso
parents:
6059
diff
changeset
|
82 public: |
bbc900c2482a
7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering
brutisso
parents:
6059
diff
changeset
|
83 void record_full_collection(double full_gc_time_ms); |
bbc900c2482a
7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering
brutisso
parents:
6059
diff
changeset
|
84 void print() const; |
342 | 85 }; |
86 | |
4729
1cbe7978b021
7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx
brutisso
parents:
4727
diff
changeset
|
87 // There are three command line options related to the young gen size: |
1cbe7978b021
7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx
brutisso
parents:
4727
diff
changeset
|
88 // NewSize, MaxNewSize and NewRatio (There is also -Xmn, but that is |
1cbe7978b021
7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx
brutisso
parents:
4727
diff
changeset
|
89 // just a short form for NewSize==MaxNewSize). G1 will use its internal |
1cbe7978b021
7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx
brutisso
parents:
4727
diff
changeset
|
90 // heuristics to calculate the actual young gen size, so these options |
1cbe7978b021
7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx
brutisso
parents:
4727
diff
changeset
|
91 // basically only limit the range within which G1 can pick a young gen |
1cbe7978b021
7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx
brutisso
parents:
4727
diff
changeset
|
92 // size. Also, these are general options taking byte sizes. G1 will |
1cbe7978b021
7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx
brutisso
parents:
4727
diff
changeset
|
93 // internally work with a number of regions instead. So, some rounding |
1cbe7978b021
7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx
brutisso
parents:
4727
diff
changeset
|
94 // will occur. |
1cbe7978b021
7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx
brutisso
parents:
4727
diff
changeset
|
95 // |
1cbe7978b021
7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx
brutisso
parents:
4727
diff
changeset
|
96 // If nothing related to the the young gen size is set on the command |
7449 | 97 // line we should allow the young gen to be between G1NewSizePercent |
98 // and G1MaxNewSizePercent of the heap size. This means that every time | |
99 // the heap size changes, the limits for the young gen size will be | |
100 // recalculated. | |
4729
1cbe7978b021
7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx
brutisso
parents:
4727
diff
changeset
|
101 // |
1cbe7978b021
7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx
brutisso
parents:
4727
diff
changeset
|
102 // If only -XX:NewSize is set we should use the specified value as the |
7449 | 103 // minimum size for young gen. Still using G1MaxNewSizePercent of the |
104 // heap as maximum. | |
4729
1cbe7978b021
7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx
brutisso
parents:
4727
diff
changeset
|
105 // |
1cbe7978b021
7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx
brutisso
parents:
4727
diff
changeset
|
106 // If only -XX:MaxNewSize is set we should use the specified value as the |
7449 | 107 // maximum size for young gen. Still using G1NewSizePercent of the heap |
108 // as minimum. | |
4729
1cbe7978b021
7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx
brutisso
parents:
4727
diff
changeset
|
109 // |
1cbe7978b021
7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx
brutisso
parents:
4727
diff
changeset
|
110 // If -XX:NewSize and -XX:MaxNewSize are both specified we use these values. |
1cbe7978b021
7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx
brutisso
parents:
4727
diff
changeset
|
111 // No updates when the heap size changes. There is a special case when |
1cbe7978b021
7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx
brutisso
parents:
4727
diff
changeset
|
112 // NewSize==MaxNewSize. This is interpreted as "fixed" and will use a |
1cbe7978b021
7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx
brutisso
parents:
4727
diff
changeset
|
113 // different heuristic for calculating the collection set when we do mixed |
1cbe7978b021
7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx
brutisso
parents:
4727
diff
changeset
|
114 // collection. |
1cbe7978b021
7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx
brutisso
parents:
4727
diff
changeset
|
115 // |
1cbe7978b021
7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx
brutisso
parents:
4727
diff
changeset
|
116 // If only -XX:NewRatio is set we should use the specified ratio of the heap |
1cbe7978b021
7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx
brutisso
parents:
4727
diff
changeset
|
117 // as both min and max. This will be interpreted as "fixed" just like the |
1cbe7978b021
7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx
brutisso
parents:
4727
diff
changeset
|
118 // NewSize==MaxNewSize case above. But we will update the min and max |
1cbe7978b021
7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx
brutisso
parents:
4727
diff
changeset
|
119 // everytime the heap size changes. |
1cbe7978b021
7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx
brutisso
parents:
4727
diff
changeset
|
120 // |
1cbe7978b021
7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx
brutisso
parents:
4727
diff
changeset
|
121 // NewSize and MaxNewSize override NewRatio. So, NewRatio is ignored if it is |
1cbe7978b021
7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx
brutisso
parents:
4727
diff
changeset
|
122 // combined with either NewSize or MaxNewSize. (A warning message is printed.) |
6197 | 123 class G1YoungGenSizer : public CHeapObj<mtGC> { |
4729
1cbe7978b021
7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx
brutisso
parents:
4727
diff
changeset
|
124 private: |
1cbe7978b021
7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx
brutisso
parents:
4727
diff
changeset
|
125 enum SizerKind { |
1cbe7978b021
7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx
brutisso
parents:
4727
diff
changeset
|
126 SizerDefaults, |
1cbe7978b021
7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx
brutisso
parents:
4727
diff
changeset
|
127 SizerNewSizeOnly, |
1cbe7978b021
7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx
brutisso
parents:
4727
diff
changeset
|
128 SizerMaxNewSizeOnly, |
1cbe7978b021
7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx
brutisso
parents:
4727
diff
changeset
|
129 SizerMaxAndNewSize, |
1cbe7978b021
7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx
brutisso
parents:
4727
diff
changeset
|
130 SizerNewRatio |
1cbe7978b021
7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx
brutisso
parents:
4727
diff
changeset
|
131 }; |
1cbe7978b021
7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx
brutisso
parents:
4727
diff
changeset
|
132 SizerKind _sizer_kind; |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
5988
diff
changeset
|
133 uint _min_desired_young_length; |
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
5988
diff
changeset
|
134 uint _max_desired_young_length; |
4729
1cbe7978b021
7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx
brutisso
parents:
4727
diff
changeset
|
135 bool _adaptive_size; |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
5988
diff
changeset
|
136 uint calculate_default_min_length(uint new_number_of_heap_regions); |
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
5988
diff
changeset
|
137 uint calculate_default_max_length(uint new_number_of_heap_regions); |
4729
1cbe7978b021
7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx
brutisso
parents:
4727
diff
changeset
|
138 |
13060
8f07aa079343
8016309: assert(eden_size > 0 && survivor_size > 0) failed: just checking
jwilhelm
parents:
13059
diff
changeset
|
139 // Update the given values for minimum and maximum young gen length in regions |
8f07aa079343
8016309: assert(eden_size > 0 && survivor_size > 0) failed: just checking
jwilhelm
parents:
13059
diff
changeset
|
140 // given the number of heap regions depending on the kind of sizing algorithm. |
8f07aa079343
8016309: assert(eden_size > 0 && survivor_size > 0) failed: just checking
jwilhelm
parents:
13059
diff
changeset
|
141 void recalculate_min_max_young_length(uint number_of_heap_regions, uint* min_young_length, uint* max_young_length); |
8f07aa079343
8016309: assert(eden_size > 0 && survivor_size > 0) failed: just checking
jwilhelm
parents:
13059
diff
changeset
|
142 |
4729
1cbe7978b021
7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx
brutisso
parents:
4727
diff
changeset
|
143 public: |
1cbe7978b021
7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx
brutisso
parents:
4727
diff
changeset
|
144 G1YoungGenSizer(); |
13060
8f07aa079343
8016309: assert(eden_size > 0 && survivor_size > 0) failed: just checking
jwilhelm
parents:
13059
diff
changeset
|
145 // Calculate the maximum length of the young gen given the number of regions |
8f07aa079343
8016309: assert(eden_size > 0 && survivor_size > 0) failed: just checking
jwilhelm
parents:
13059
diff
changeset
|
146 // depending on the sizing algorithm. |
8f07aa079343
8016309: assert(eden_size > 0 && survivor_size > 0) failed: just checking
jwilhelm
parents:
13059
diff
changeset
|
147 uint max_young_length(uint number_of_heap_regions); |
8f07aa079343
8016309: assert(eden_size > 0 && survivor_size > 0) failed: just checking
jwilhelm
parents:
13059
diff
changeset
|
148 |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
5988
diff
changeset
|
149 void heap_size_changed(uint new_number_of_heap_regions); |
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
5988
diff
changeset
|
150 uint min_desired_young_length() { |
4729
1cbe7978b021
7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx
brutisso
parents:
4727
diff
changeset
|
151 return _min_desired_young_length; |
1cbe7978b021
7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx
brutisso
parents:
4727
diff
changeset
|
152 } |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
5988
diff
changeset
|
153 uint max_desired_young_length() { |
4729
1cbe7978b021
7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx
brutisso
parents:
4727
diff
changeset
|
154 return _max_desired_young_length; |
1cbe7978b021
7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx
brutisso
parents:
4727
diff
changeset
|
155 } |
1cbe7978b021
7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx
brutisso
parents:
4727
diff
changeset
|
156 bool adaptive_young_list_length() { |
1cbe7978b021
7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx
brutisso
parents:
4727
diff
changeset
|
157 return _adaptive_size; |
1cbe7978b021
7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx
brutisso
parents:
4727
diff
changeset
|
158 } |
1cbe7978b021
7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx
brutisso
parents:
4727
diff
changeset
|
159 }; |
1cbe7978b021
7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx
brutisso
parents:
4727
diff
changeset
|
160 |
342 | 161 class G1CollectorPolicy: public CollectorPolicy { |
4013 | 162 private: |
342 | 163 // either equal to the number of parallel threads, if ParallelGCThreads |
164 // has been set, or 1 otherwise | |
165 int _parallel_gc_threads; | |
166 | |
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
167 // The number of GC threads currently active. |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
168 uintx _no_of_gc_threads; |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
169 |
342 | 170 enum SomePrivateConstants { |
942
2c79770d1f6e
6819085: G1: use larger and/or user settable region size
tonyp
parents:
936
diff
changeset
|
171 NumPrevPausesForHeuristics = 10 |
342 | 172 }; |
173 | |
174 G1MMUTracker* _mmu_tracker; | |
175 | |
13060
8f07aa079343
8016309: assert(eden_size > 0 && survivor_size > 0) failed: just checking
jwilhelm
parents:
13059
diff
changeset
|
176 void initialize_alignments(); |
342 | 177 void initialize_flags(); |
178 | |
4013 | 179 CollectionSetChooser* _collectionSetChooser; |
342 | 180 |
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6109
diff
changeset
|
181 double _full_collection_start_sec; |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
5988
diff
changeset
|
182 uint _cur_collection_pause_used_regions_at_start; |
890
6cb8e9df7174
6819077: G1: first GC thread coming late into the GC.
johnc
parents:
838
diff
changeset
|
183 |
342 | 184 // These exclude marking times. |
185 TruncatedSeq* _recent_gc_times_ms; | |
186 | |
187 TruncatedSeq* _concurrent_mark_remark_times_ms; | |
188 TruncatedSeq* _concurrent_mark_cleanup_times_ms; | |
189 | |
6109
bbc900c2482a
7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering
brutisso
parents:
6059
diff
changeset
|
190 TraceGen0TimeData _trace_gen0_time_data; |
bbc900c2482a
7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering
brutisso
parents:
6059
diff
changeset
|
191 TraceGen1TimeData _trace_gen1_time_data; |
342 | 192 |
193 double _stop_world_start; | |
194 | |
4710 | 195 // indicates whether we are in young or mixed GC mode |
196 bool _gcs_are_young; | |
342 | 197 |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
5988
diff
changeset
|
198 uint _young_list_target_length; |
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
5988
diff
changeset
|
199 uint _young_list_fixed_length; |
342 | 200 |
1991
016a3628c885
6994056: G1: when GC locker is active, extend the Eden instead of allocating into the old gen
tonyp
parents:
1973
diff
changeset
|
201 // The max number of regions we can extend the eden by while the GC |
016a3628c885
6994056: G1: when GC locker is active, extend the Eden instead of allocating into the old gen
tonyp
parents:
1973
diff
changeset
|
202 // locker is active. This should be >= _young_list_target_length; |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
5988
diff
changeset
|
203 uint _young_list_max_length; |
1991
016a3628c885
6994056: G1: when GC locker is active, extend the Eden instead of allocating into the old gen
tonyp
parents:
1973
diff
changeset
|
204 |
4710 | 205 bool _last_gc_was_young; |
342 | 206 |
207 bool _during_marking; | |
208 bool _in_marking_window; | |
209 bool _in_marking_window_im; | |
210 | |
211 SurvRateGroup* _short_lived_surv_rate_group; | |
212 SurvRateGroup* _survivor_surv_rate_group; | |
213 // add here any more surv rate groups | |
214 | |
1356 | 215 double _gc_overhead_perc; |
216 | |
3919
4f41766176cf
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
3914
diff
changeset
|
217 double _reserve_factor; |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
5988
diff
changeset
|
218 uint _reserve_regions; |
3919
4f41766176cf
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
3914
diff
changeset
|
219 |
342 | 220 bool during_marking() { |
221 return _during_marking; | |
222 } | |
223 | |
224 enum PredictionConstants { | |
225 TruncatedSeqLength = 10 | |
226 }; | |
227 | |
228 TruncatedSeq* _alloc_rate_ms_seq; | |
229 double _prev_collection_pause_end_ms; | |
230 | |
231 TruncatedSeq* _rs_length_diff_seq; | |
232 TruncatedSeq* _cost_per_card_ms_seq; | |
4710 | 233 TruncatedSeq* _young_cards_per_entry_ratio_seq; |
234 TruncatedSeq* _mixed_cards_per_entry_ratio_seq; | |
342 | 235 TruncatedSeq* _cost_per_entry_ms_seq; |
4710 | 236 TruncatedSeq* _mixed_cost_per_entry_ms_seq; |
342 | 237 TruncatedSeq* _cost_per_byte_ms_seq; |
238 TruncatedSeq* _constant_other_time_ms_seq; | |
239 TruncatedSeq* _young_other_cost_per_region_ms_seq; | |
240 TruncatedSeq* _non_young_other_cost_per_region_ms_seq; | |
241 | |
242 TruncatedSeq* _pending_cards_seq; | |
243 TruncatedSeq* _rs_lengths_seq; | |
244 | |
245 TruncatedSeq* _cost_per_byte_ms_during_cm_seq; | |
246 | |
4729
1cbe7978b021
7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx
brutisso
parents:
4727
diff
changeset
|
247 G1YoungGenSizer* _young_gen_sizer; |
3920
af2ab04e0038
6929868: G1: introduce min / max young gen size bounds
brutisso
parents:
3919
diff
changeset
|
248 |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
5988
diff
changeset
|
249 uint _eden_cset_region_length; |
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
5988
diff
changeset
|
250 uint _survivor_cset_region_length; |
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
5988
diff
changeset
|
251 uint _old_cset_region_length; |
4090
a88de71c4e3a
7097002: G1: remove a lot of unused / redundant code from the G1CollectorPolicy class
tonyp
parents:
4023
diff
changeset
|
252 |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
5988
diff
changeset
|
253 void init_cset_region_lengths(uint eden_cset_region_length, |
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
5988
diff
changeset
|
254 uint survivor_cset_region_length); |
4090
a88de71c4e3a
7097002: G1: remove a lot of unused / redundant code from the G1CollectorPolicy class
tonyp
parents:
4023
diff
changeset
|
255 |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
5988
diff
changeset
|
256 uint eden_cset_region_length() { return _eden_cset_region_length; } |
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
5988
diff
changeset
|
257 uint survivor_cset_region_length() { return _survivor_cset_region_length; } |
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
5988
diff
changeset
|
258 uint old_cset_region_length() { return _old_cset_region_length; } |
342 | 259 |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
5988
diff
changeset
|
260 uint _free_regions_at_end_of_collection; |
342 | 261 |
262 size_t _recorded_rs_lengths; | |
263 size_t _max_rs_lengths; | |
264 double _sigma; | |
265 | |
266 size_t _rs_lengths_prediction; | |
267 | |
4912
a9647476d1a4
7132029: G1: mixed GC phase lasts for longer than it should
tonyp
parents:
4837
diff
changeset
|
268 double sigma() { return _sigma; } |
342 | 269 |
270 // A function that prevents us putting too much stock in small sample | |
271 // sets. Returns a number between 2.0 and 1.0, depending on the number | |
272 // of samples. 5 or more samples yields one; fewer scales linearly from | |
273 // 2.0 at 1 sample to 1.0 at 5. | |
274 double confidence_factor(int samples) { | |
275 if (samples > 4) return 1.0; | |
276 else return 1.0 + sigma() * ((double)(5 - samples))/2.0; | |
277 } | |
278 | |
279 double get_new_neg_prediction(TruncatedSeq* seq) { | |
280 return seq->davg() - sigma() * seq->dsd(); | |
281 } | |
282 | |
283 #ifndef PRODUCT | |
284 bool verify_young_ages(HeapRegion* head, SurvRateGroup *surv_rate_group); | |
285 #endif // PRODUCT | |
286 | |
1111 | 287 void adjust_concurrent_refinement(double update_rs_time, |
288 double update_rs_processed_buffers, | |
289 double goal_ms); | |
290 | |
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
291 uintx no_of_gc_threads() { return _no_of_gc_threads; } |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
292 void set_no_of_gc_threads(uintx v) { _no_of_gc_threads = v; } |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
293 |
342 | 294 double _pause_time_target_ms; |
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6109
diff
changeset
|
295 |
342 | 296 size_t _pending_cards; |
297 | |
298 public: | |
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
299 // Accessors |
342 | 300 |
4090
a88de71c4e3a
7097002: G1: remove a lot of unused / redundant code from the G1CollectorPolicy class
tonyp
parents:
4023
diff
changeset
|
301 void set_region_eden(HeapRegion* hr, int young_index_in_cset) { |
a88de71c4e3a
7097002: G1: remove a lot of unused / redundant code from the G1CollectorPolicy class
tonyp
parents:
4023
diff
changeset
|
302 hr->set_young(); |
342 | 303 hr->install_surv_rate_group(_short_lived_surv_rate_group); |
4090
a88de71c4e3a
7097002: G1: remove a lot of unused / redundant code from the G1CollectorPolicy class
tonyp
parents:
4023
diff
changeset
|
304 hr->set_young_index_in_cset(young_index_in_cset); |
342 | 305 } |
306 | |
4090
a88de71c4e3a
7097002: G1: remove a lot of unused / redundant code from the G1CollectorPolicy class
tonyp
parents:
4023
diff
changeset
|
307 void set_region_survivor(HeapRegion* hr, int young_index_in_cset) { |
a88de71c4e3a
7097002: G1: remove a lot of unused / redundant code from the G1CollectorPolicy class
tonyp
parents:
4023
diff
changeset
|
308 assert(hr->is_young() && hr->is_survivor(), "pre-condition"); |
342 | 309 hr->install_surv_rate_group(_survivor_surv_rate_group); |
4090
a88de71c4e3a
7097002: G1: remove a lot of unused / redundant code from the G1CollectorPolicy class
tonyp
parents:
4023
diff
changeset
|
310 hr->set_young_index_in_cset(young_index_in_cset); |
342 | 311 } |
312 | |
313 #ifndef PRODUCT | |
314 bool verify_young_ages(); | |
315 #endif // PRODUCT | |
316 | |
317 double get_new_prediction(TruncatedSeq* seq) { | |
318 return MAX2(seq->davg() + sigma() * seq->dsd(), | |
319 seq->davg() * confidence_factor(seq->num())); | |
320 } | |
321 | |
322 void record_max_rs_lengths(size_t rs_lengths) { | |
323 _max_rs_lengths = rs_lengths; | |
324 } | |
325 | |
326 size_t predict_rs_length_diff() { | |
327 return (size_t) get_new_prediction(_rs_length_diff_seq); | |
328 } | |
329 | |
330 double predict_alloc_rate_ms() { | |
331 return get_new_prediction(_alloc_rate_ms_seq); | |
332 } | |
333 | |
334 double predict_cost_per_card_ms() { | |
335 return get_new_prediction(_cost_per_card_ms_seq); | |
336 } | |
337 | |
338 double predict_rs_update_time_ms(size_t pending_cards) { | |
339 return (double) pending_cards * predict_cost_per_card_ms(); | |
340 } | |
341 | |
4710 | 342 double predict_young_cards_per_entry_ratio() { |
343 return get_new_prediction(_young_cards_per_entry_ratio_seq); | |
342 | 344 } |
345 | |
4710 | 346 double predict_mixed_cards_per_entry_ratio() { |
347 if (_mixed_cards_per_entry_ratio_seq->num() < 2) { | |
348 return predict_young_cards_per_entry_ratio(); | |
349 } else { | |
350 return get_new_prediction(_mixed_cards_per_entry_ratio_seq); | |
351 } | |
342 | 352 } |
353 | |
354 size_t predict_young_card_num(size_t rs_length) { | |
355 return (size_t) ((double) rs_length * | |
4710 | 356 predict_young_cards_per_entry_ratio()); |
342 | 357 } |
358 | |
359 size_t predict_non_young_card_num(size_t rs_length) { | |
360 return (size_t) ((double) rs_length * | |
4710 | 361 predict_mixed_cards_per_entry_ratio()); |
342 | 362 } |
363 | |
364 double predict_rs_scan_time_ms(size_t card_num) { | |
4710 | 365 if (gcs_are_young()) { |
342 | 366 return (double) card_num * get_new_prediction(_cost_per_entry_ms_seq); |
4710 | 367 } else { |
368 return predict_mixed_rs_scan_time_ms(card_num); | |
369 } | |
342 | 370 } |
371 | |
4710 | 372 double predict_mixed_rs_scan_time_ms(size_t card_num) { |
373 if (_mixed_cost_per_entry_ms_seq->num() < 3) { | |
342 | 374 return (double) card_num * get_new_prediction(_cost_per_entry_ms_seq); |
4710 | 375 } else { |
376 return (double) (card_num * | |
377 get_new_prediction(_mixed_cost_per_entry_ms_seq)); | |
378 } | |
342 | 379 } |
380 | |
381 double predict_object_copy_time_ms_during_cm(size_t bytes_to_copy) { | |
4710 | 382 if (_cost_per_byte_ms_during_cm_seq->num() < 3) { |
383 return (1.1 * (double) bytes_to_copy) * | |
384 get_new_prediction(_cost_per_byte_ms_seq); | |
385 } else { | |
342 | 386 return (double) bytes_to_copy * |
4710 | 387 get_new_prediction(_cost_per_byte_ms_during_cm_seq); |
388 } | |
342 | 389 } |
390 | |
391 double predict_object_copy_time_ms(size_t bytes_to_copy) { | |
4710 | 392 if (_in_marking_window && !_in_marking_window_im) { |
342 | 393 return predict_object_copy_time_ms_during_cm(bytes_to_copy); |
4710 | 394 } else { |
342 | 395 return (double) bytes_to_copy * |
4710 | 396 get_new_prediction(_cost_per_byte_ms_seq); |
397 } | |
342 | 398 } |
399 | |
400 double predict_constant_other_time_ms() { | |
401 return get_new_prediction(_constant_other_time_ms_seq); | |
402 } | |
403 | |
404 double predict_young_other_time_ms(size_t young_num) { | |
4710 | 405 return (double) young_num * |
406 get_new_prediction(_young_other_cost_per_region_ms_seq); | |
342 | 407 } |
408 | |
409 double predict_non_young_other_time_ms(size_t non_young_num) { | |
4710 | 410 return (double) non_young_num * |
411 get_new_prediction(_non_young_other_cost_per_region_ms_seq); | |
342 | 412 } |
413 | |
414 double predict_base_elapsed_time_ms(size_t pending_cards); | |
415 double predict_base_elapsed_time_ms(size_t pending_cards, | |
416 size_t scanned_cards); | |
417 size_t predict_bytes_to_copy(HeapRegion* hr); | |
6611 | 418 double predict_region_elapsed_time_ms(HeapRegion* hr, bool for_young_gc); |
342 | 419 |
4090
a88de71c4e3a
7097002: G1: remove a lot of unused / redundant code from the G1CollectorPolicy class
tonyp
parents:
4023
diff
changeset
|
420 void set_recorded_rs_lengths(size_t rs_lengths); |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
421 |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
5988
diff
changeset
|
422 uint cset_region_length() { return young_cset_region_length() + |
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
5988
diff
changeset
|
423 old_cset_region_length(); } |
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
5988
diff
changeset
|
424 uint young_cset_region_length() { return eden_cset_region_length() + |
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
5988
diff
changeset
|
425 survivor_cset_region_length(); } |
342 | 426 |
545 | 427 double predict_survivor_regions_evac_time(); |
428 | |
342 | 429 void cset_regions_freed() { |
4710 | 430 bool propagate = _last_gc_was_young && !_in_marking_window; |
342 | 431 _short_lived_surv_rate_group->all_surviving_words_recorded(propagate); |
432 _survivor_surv_rate_group->all_surviving_words_recorded(propagate); | |
433 // also call it on any more surv rate groups | |
434 } | |
435 | |
436 G1MMUTracker* mmu_tracker() { | |
437 return _mmu_tracker; | |
438 } | |
439 | |
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
440 double max_pause_time_ms() { |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
441 return _mmu_tracker->max_gc_time() * 1000.0; |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
442 } |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
443 |
342 | 444 double predict_remark_time_ms() { |
445 return get_new_prediction(_concurrent_mark_remark_times_ms); | |
446 } | |
447 | |
448 double predict_cleanup_time_ms() { | |
449 return get_new_prediction(_concurrent_mark_cleanup_times_ms); | |
450 } | |
451 | |
452 // Returns an estimate of the survival rate of the region at yg-age | |
453 // "yg_age". | |
545 | 454 double predict_yg_surv_rate(int age, SurvRateGroup* surv_rate_group) { |
455 TruncatedSeq* seq = surv_rate_group->get_seq(age); | |
342 | 456 if (seq->num() == 0) |
457 gclog_or_tty->print("BARF! age is %d", age); | |
458 guarantee( seq->num() > 0, "invariant" ); | |
459 double pred = get_new_prediction(seq); | |
460 if (pred > 1.0) | |
461 pred = 1.0; | |
462 return pred; | |
463 } | |
464 | |
545 | 465 double predict_yg_surv_rate(int age) { |
466 return predict_yg_surv_rate(age, _short_lived_surv_rate_group); | |
467 } | |
468 | |
342 | 469 double accum_yg_surv_rate_pred(int age) { |
470 return _short_lived_surv_rate_group->accum_surv_rate_pred(age); | |
471 } | |
472 | |
4013 | 473 private: |
342 | 474 // Statistics kept per GC stoppage, pause or full. |
475 TruncatedSeq* _recent_prev_end_times_for_all_gcs_sec; | |
476 | |
477 // Add a new GC of the given duration and end time to the record. | |
478 void update_recent_gc_times(double end_time_sec, double elapsed_ms); | |
479 | |
480 // The head of the list (via "next_in_collection_set()") representing the | |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
481 // current collection set. Set from the incrementally built collection |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
482 // set at the start of the pause. |
342 | 483 HeapRegion* _collection_set; |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
484 |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
485 // The number of bytes in the collection set before the pause. Set from |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
486 // the incrementally built collection set at the start of an evacuation |
6611 | 487 // pause, and incremented in finalize_cset() when adding old regions |
488 // (if any) to the collection set. | |
342 | 489 size_t _collection_set_bytes_used_before; |
490 | |
6611 | 491 // The number of bytes copied during the GC. |
492 size_t _bytes_copied_during_gc; | |
493 | |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
494 // The associated information that is maintained while the incremental |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
495 // collection set is being built with young regions. Used to populate |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
496 // the recorded info for the evacuation pause. |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
497 |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
498 enum CSetBuildType { |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
499 Active, // We are actively building the collection set |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
500 Inactive // We are not actively building the collection set |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
501 }; |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
502 |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
503 CSetBuildType _inc_cset_build_state; |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
504 |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
505 // The head of the incrementally built collection set. |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
506 HeapRegion* _inc_cset_head; |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
507 |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
508 // The tail of the incrementally built collection set. |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
509 HeapRegion* _inc_cset_tail; |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
510 |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
511 // The number of bytes in the incrementally built collection set. |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
512 // Used to set _collection_set_bytes_used_before at the start of |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
513 // an evacuation pause. |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
514 size_t _inc_cset_bytes_used_before; |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
515 |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
516 // Used to record the highest end of heap region in collection set |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
517 HeapWord* _inc_cset_max_finger; |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
518 |
4727
67fdcb391461
7119027: G1: use atomics to update RS length / predict time of inc CSet
tonyp
parents:
4710
diff
changeset
|
519 // The RSet lengths recorded for regions in the CSet. It is updated |
67fdcb391461
7119027: G1: use atomics to update RS length / predict time of inc CSet
tonyp
parents:
4710
diff
changeset
|
520 // by the thread that adds a new region to the CSet. We assume that |
67fdcb391461
7119027: G1: use atomics to update RS length / predict time of inc CSet
tonyp
parents:
4710
diff
changeset
|
521 // only one thread can be allocating a new CSet region (currently, |
67fdcb391461
7119027: G1: use atomics to update RS length / predict time of inc CSet
tonyp
parents:
4710
diff
changeset
|
522 // it does so after taking the Heap_lock) hence no need to |
67fdcb391461
7119027: G1: use atomics to update RS length / predict time of inc CSet
tonyp
parents:
4710
diff
changeset
|
523 // synchronize updates to this field. |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
524 size_t _inc_cset_recorded_rs_lengths; |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
525 |
4727
67fdcb391461
7119027: G1: use atomics to update RS length / predict time of inc CSet
tonyp
parents:
4710
diff
changeset
|
526 // A concurrent refinement thread periodcially samples the young |
67fdcb391461
7119027: G1: use atomics to update RS length / predict time of inc CSet
tonyp
parents:
4710
diff
changeset
|
527 // region RSets and needs to update _inc_cset_recorded_rs_lengths as |
67fdcb391461
7119027: G1: use atomics to update RS length / predict time of inc CSet
tonyp
parents:
4710
diff
changeset
|
528 // the RSets grow. Instead of having to syncronize updates to that |
67fdcb391461
7119027: G1: use atomics to update RS length / predict time of inc CSet
tonyp
parents:
4710
diff
changeset
|
529 // field we accumulate them in this field and add it to |
67fdcb391461
7119027: G1: use atomics to update RS length / predict time of inc CSet
tonyp
parents:
4710
diff
changeset
|
530 // _inc_cset_recorded_rs_lengths_diffs at the start of a GC. |
67fdcb391461
7119027: G1: use atomics to update RS length / predict time of inc CSet
tonyp
parents:
4710
diff
changeset
|
531 ssize_t _inc_cset_recorded_rs_lengths_diffs; |
67fdcb391461
7119027: G1: use atomics to update RS length / predict time of inc CSet
tonyp
parents:
4710
diff
changeset
|
532 |
67fdcb391461
7119027: G1: use atomics to update RS length / predict time of inc CSet
tonyp
parents:
4710
diff
changeset
|
533 // The predicted elapsed time it will take to collect the regions in |
67fdcb391461
7119027: G1: use atomics to update RS length / predict time of inc CSet
tonyp
parents:
4710
diff
changeset
|
534 // the CSet. This is updated by the thread that adds a new region to |
67fdcb391461
7119027: G1: use atomics to update RS length / predict time of inc CSet
tonyp
parents:
4710
diff
changeset
|
535 // the CSet. See the comment for _inc_cset_recorded_rs_lengths about |
67fdcb391461
7119027: G1: use atomics to update RS length / predict time of inc CSet
tonyp
parents:
4710
diff
changeset
|
536 // MT-safety assumptions. |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
537 double _inc_cset_predicted_elapsed_time_ms; |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
538 |
4727
67fdcb391461
7119027: G1: use atomics to update RS length / predict time of inc CSet
tonyp
parents:
4710
diff
changeset
|
539 // See the comment for _inc_cset_recorded_rs_lengths_diffs. |
67fdcb391461
7119027: G1: use atomics to update RS length / predict time of inc CSet
tonyp
parents:
4710
diff
changeset
|
540 double _inc_cset_predicted_elapsed_time_ms_diffs; |
67fdcb391461
7119027: G1: use atomics to update RS length / predict time of inc CSet
tonyp
parents:
4710
diff
changeset
|
541 |
342 | 542 // Stash a pointer to the g1 heap. |
543 G1CollectedHeap* _g1; | |
544 | |
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6109
diff
changeset
|
545 G1GCPhaseTimes* _phase_times; |
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6109
diff
changeset
|
546 |
342 | 547 // The ratio of gc time to elapsed time, computed over recent pauses. |
548 double _recent_avg_pause_time_ratio; | |
549 | |
550 double recent_avg_pause_time_ratio() { | |
551 return _recent_avg_pause_time_ratio; | |
552 } | |
553 | |
1359
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
554 // At the end of a pause we check the heap occupancy and we decide |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
555 // whether we will start a marking cycle during the next pause. If |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
556 // we decide that we want to do that, we will set this parameter to |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
557 // true. So, this parameter will stay true between the end of a |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
558 // pause and the beginning of a subsequent pause (not necessarily |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
559 // the next one, see the comments on the next field) when we decide |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
560 // that we will indeed start a marking cycle and do the initial-mark |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
561 // work. |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
562 volatile bool _initiate_conc_mark_if_possible; |
342 | 563 |
1359
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
564 // If initiate_conc_mark_if_possible() is set at the beginning of a |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
565 // pause, it is a suggestion that the pause should start a marking |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
566 // cycle by doing the initial-mark work. However, it is possible |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
567 // that the concurrent marking thread is still finishing up the |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
568 // previous marking cycle (e.g., clearing the next marking |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
569 // bitmap). If that is the case we cannot start a new cycle and |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
570 // we'll have to wait for the concurrent marking thread to finish |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
571 // what it is doing. In this case we will postpone the marking cycle |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
572 // initiation decision for the next pause. When we eventually decide |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
573 // to start a cycle, we will set _during_initial_mark_pause which |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
574 // will stay true until the end of the initial-mark pause and it's |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
575 // the condition that indicates that a pause is doing the |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
576 // initial-mark work. |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
577 volatile bool _during_initial_mark_pause; |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
578 |
4710 | 579 bool _last_young_gc; |
342 | 580 |
581 // This set of variables tracks the collector efficiency, in order to | |
582 // determine whether we should initiate a new marking. | |
583 double _cur_mark_stop_world_time_ms; | |
584 double _mark_remark_start_sec; | |
585 double _mark_cleanup_start_sec; | |
586 | |
3919
4f41766176cf
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
3914
diff
changeset
|
587 // Update the young list target length either by setting it to the |
4f41766176cf
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
3914
diff
changeset
|
588 // desired fixed value or by calculating it using G1's pause |
4f41766176cf
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
3914
diff
changeset
|
589 // prediction model. If no rs_lengths parameter is passed, predict |
4f41766176cf
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
3914
diff
changeset
|
590 // the RS lengths using the prediction model, otherwise use the |
4f41766176cf
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
3914
diff
changeset
|
591 // given rs_lengths as the prediction. |
4f41766176cf
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
3914
diff
changeset
|
592 void update_young_list_target_length(size_t rs_lengths = (size_t) -1); |
4f41766176cf
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
3914
diff
changeset
|
593 |
4f41766176cf
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
3914
diff
changeset
|
594 // Calculate and return the minimum desired young list target |
4f41766176cf
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
3914
diff
changeset
|
595 // length. This is the minimum desired young list length according |
4f41766176cf
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
3914
diff
changeset
|
596 // to the user's inputs. |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
5988
diff
changeset
|
597 uint calculate_young_list_desired_min_length(uint base_min_length); |
3919
4f41766176cf
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
3914
diff
changeset
|
598 |
4f41766176cf
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
3914
diff
changeset
|
599 // Calculate and return the maximum desired young list target |
4f41766176cf
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
3914
diff
changeset
|
600 // length. This is the maximum desired young list length according |
4f41766176cf
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
3914
diff
changeset
|
601 // to the user's inputs. |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
5988
diff
changeset
|
602 uint calculate_young_list_desired_max_length(); |
3919
4f41766176cf
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
3914
diff
changeset
|
603 |
4f41766176cf
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
3914
diff
changeset
|
604 // Calculate and return the maximum young list target length that |
4f41766176cf
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
3914
diff
changeset
|
605 // can fit into the pause time goal. The parameters are: rs_lengths |
4f41766176cf
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
3914
diff
changeset
|
606 // represent the prediction of how large the young RSet lengths will |
4f41766176cf
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
3914
diff
changeset
|
607 // be, base_min_length is the alreay existing number of regions in |
4f41766176cf
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
3914
diff
changeset
|
608 // the young list, min_length and max_length are the desired min and |
4f41766176cf
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
3914
diff
changeset
|
609 // max young list length according to the user's inputs. |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
5988
diff
changeset
|
610 uint calculate_young_list_target_length(size_t rs_lengths, |
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
5988
diff
changeset
|
611 uint base_min_length, |
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
5988
diff
changeset
|
612 uint desired_min_length, |
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
5988
diff
changeset
|
613 uint desired_max_length); |
3919
4f41766176cf
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
3914
diff
changeset
|
614 |
4f41766176cf
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
3914
diff
changeset
|
615 // Check whether a given young length (young_length) fits into the |
4f41766176cf
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
3914
diff
changeset
|
616 // given target pause time and whether the prediction for the amount |
4f41766176cf
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
3914
diff
changeset
|
617 // of objects to be copied for the given length will fit into the |
4f41766176cf
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
3914
diff
changeset
|
618 // given free space (expressed by base_free_regions). It is used by |
4f41766176cf
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
3914
diff
changeset
|
619 // calculate_young_list_target_length(). |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
5988
diff
changeset
|
620 bool predict_will_fit(uint young_length, double base_time_ms, |
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
5988
diff
changeset
|
621 uint base_free_regions, double target_pause_time_ms); |
342 | 622 |
8681
27714220e50e
8007036: G1: Too many old regions added to last mixed GC
johnc
parents:
7449
diff
changeset
|
623 // Calculate the minimum number of old regions we'll add to the CSet |
27714220e50e
8007036: G1: Too many old regions added to last mixed GC
johnc
parents:
7449
diff
changeset
|
624 // during a mixed GC. |
27714220e50e
8007036: G1: Too many old regions added to last mixed GC
johnc
parents:
7449
diff
changeset
|
625 uint calc_min_old_cset_length(); |
27714220e50e
8007036: G1: Too many old regions added to last mixed GC
johnc
parents:
7449
diff
changeset
|
626 |
27714220e50e
8007036: G1: Too many old regions added to last mixed GC
johnc
parents:
7449
diff
changeset
|
627 // Calculate the maximum number of old regions we'll add to the CSet |
27714220e50e
8007036: G1: Too many old regions added to last mixed GC
johnc
parents:
7449
diff
changeset
|
628 // during a mixed GC. |
27714220e50e
8007036: G1: Too many old regions added to last mixed GC
johnc
parents:
7449
diff
changeset
|
629 uint calc_max_old_cset_length(); |
27714220e50e
8007036: G1: Too many old regions added to last mixed GC
johnc
parents:
7449
diff
changeset
|
630 |
27714220e50e
8007036: G1: Too many old regions added to last mixed GC
johnc
parents:
7449
diff
changeset
|
631 // Returns the given amount of uncollected reclaimable space |
27714220e50e
8007036: G1: Too many old regions added to last mixed GC
johnc
parents:
7449
diff
changeset
|
632 // as a percentage of the current heap capacity. |
27714220e50e
8007036: G1: Too many old regions added to last mixed GC
johnc
parents:
7449
diff
changeset
|
633 double reclaimable_bytes_perc(size_t reclaimable_bytes); |
27714220e50e
8007036: G1: Too many old regions added to last mixed GC
johnc
parents:
7449
diff
changeset
|
634 |
342 | 635 public: |
636 | |
637 G1CollectorPolicy(); | |
638 | |
639 virtual G1CollectorPolicy* as_g1_policy() { return this; } | |
640 | |
641 virtual CollectorPolicy::Name kind() { | |
642 return CollectorPolicy::G1CollectorPolicyKind; | |
643 } | |
644 | |
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6109
diff
changeset
|
645 G1GCPhaseTimes* phase_times() const { return _phase_times; } |
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6109
diff
changeset
|
646 |
3919
4f41766176cf
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
3914
diff
changeset
|
647 // Check the current value of the young list RSet lengths and |
4f41766176cf
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
3914
diff
changeset
|
648 // compare it against the last prediction. If the current value is |
4f41766176cf
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
3914
diff
changeset
|
649 // higher, recalculate the young list target length prediction. |
4f41766176cf
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
3914
diff
changeset
|
650 void revise_young_list_target_length_if_necessary(); |
342 | 651 |
3920
af2ab04e0038
6929868: G1: introduce min / max young gen size bounds
brutisso
parents:
3919
diff
changeset
|
652 // This should be called after the heap is resized. |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
5988
diff
changeset
|
653 void record_new_heap_size(uint new_number_of_regions); |
3919
4f41766176cf
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
3914
diff
changeset
|
654 |
4013 | 655 void init(); |
342 | 656 |
545 | 657 // Create jstat counters for the policy. |
658 virtual void initialize_gc_policy_counters(); | |
659 | |
342 | 660 virtual HeapWord* mem_allocate_work(size_t size, |
661 bool is_tlab, | |
662 bool* gc_overhead_limit_was_exceeded); | |
663 | |
664 // This method controls how a collector handles one or more | |
665 // of its generations being fully allocated. | |
666 virtual HeapWord* satisfy_failed_allocation(size_t size, | |
667 bool is_tlab); | |
668 | |
669 BarrierSet::Name barrier_set_name() { return BarrierSet::G1SATBCTLogging; } | |
670 | |
4834
6a78aa6ac1ff
7132311: G1: assert((s == klass->oop_size(this)) || (Universe::heap()->is_gc_active() && ((is_typeArray()...
brutisso
parents:
4829
diff
changeset
|
671 bool need_to_start_conc_mark(const char* source, size_t alloc_word_size = 0); |
4829
9509c20bba28
6976060: G1: humongous object allocations should initiate marking cycles when necessary
brutisso
parents:
4787
diff
changeset
|
672 |
10098
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
8681
diff
changeset
|
673 // Record the start and end of an evacuation pause. |
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
8681
diff
changeset
|
674 void record_collection_pause_start(double start_time_sec); |
10405 | 675 void record_collection_pause_end(double pause_time_ms, EvacuationInfo& evacuation_info); |
342 | 676 |
10098
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
8681
diff
changeset
|
677 // Record the start and end of a full collection. |
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
8681
diff
changeset
|
678 void record_full_collection_start(); |
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
8681
diff
changeset
|
679 void record_full_collection_end(); |
342 | 680 |
681 // Must currently be called while the world is stopped. | |
10098
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
8681
diff
changeset
|
682 void record_concurrent_mark_init_end(double mark_init_elapsed_time_ms); |
342 | 683 |
10098
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
8681
diff
changeset
|
684 // Record start and end of remark. |
4013 | 685 void record_concurrent_mark_remark_start(); |
686 void record_concurrent_mark_remark_end(); | |
342 | 687 |
10098
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
8681
diff
changeset
|
688 // Record start, end, and completion of cleanup. |
4013 | 689 void record_concurrent_mark_cleanup_start(); |
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
690 void record_concurrent_mark_cleanup_end(int no_of_gc_threads); |
4013 | 691 void record_concurrent_mark_cleanup_completed(); |
342 | 692 |
10098
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
8681
diff
changeset
|
693 // Records the information about the heap size for reporting in |
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
8681
diff
changeset
|
694 // print_detailed_heap_transition |
10291
48391ab0687e
8010738: G1: Output for full GCs with +PrintGCDetails should contain perm gen size/meta data change info
johnc
parents:
10098
diff
changeset
|
695 void record_heap_size_info_at_start(bool full); |
342 | 696 |
10098
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
8681
diff
changeset
|
697 // Print heap sizing transition (with less and more detail). |
3764
053d84a76d3d
7032531: G1: enhance GC logging to include more accurate eden / survivor size transitions
tonyp
parents:
2430
diff
changeset
|
698 void print_heap_transition(); |
10291
48391ab0687e
8010738: G1: Output for full GCs with +PrintGCDetails should contain perm gen size/meta data change info
johnc
parents:
10098
diff
changeset
|
699 void print_detailed_heap_transition(bool full = false); |
342 | 700 |
10098
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
8681
diff
changeset
|
701 void record_stop_world_start(); |
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
8681
diff
changeset
|
702 void record_concurrent_pause(); |
342 | 703 |
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3823
diff
changeset
|
704 // Record how much space we copied during a GC. This is typically |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3823
diff
changeset
|
705 // called when a GC alloc region is being retired. |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3823
diff
changeset
|
706 void record_bytes_copied_during_gc(size_t bytes) { |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3823
diff
changeset
|
707 _bytes_copied_during_gc += bytes; |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3823
diff
changeset
|
708 } |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3823
diff
changeset
|
709 |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3823
diff
changeset
|
710 // The amount of space we copied during a GC. |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3823
diff
changeset
|
711 size_t bytes_copied_during_gc() { |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3823
diff
changeset
|
712 return _bytes_copied_during_gc; |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3823
diff
changeset
|
713 } |
342 | 714 |
5972
9a9bb0010c91
7156764: Remove unused size parameter from some CollectedHeap methods
brutisso
parents:
4912
diff
changeset
|
715 // Determine whether there are candidate regions so that the |
9a9bb0010c91
7156764: Remove unused size parameter from some CollectedHeap methods
brutisso
parents:
4912
diff
changeset
|
716 // next GC should be mixed. The two action strings are used |
9a9bb0010c91
7156764: Remove unused size parameter from some CollectedHeap methods
brutisso
parents:
4912
diff
changeset
|
717 // in the ergo output when the method returns true or false. |
4912
a9647476d1a4
7132029: G1: mixed GC phase lasts for longer than it should
tonyp
parents:
4837
diff
changeset
|
718 bool next_gc_should_be_mixed(const char* true_action_str, |
a9647476d1a4
7132029: G1: mixed GC phase lasts for longer than it should
tonyp
parents:
4837
diff
changeset
|
719 const char* false_action_str); |
a9647476d1a4
7132029: G1: mixed GC phase lasts for longer than it should
tonyp
parents:
4837
diff
changeset
|
720 |
342 | 721 // Choose a new collection set. Marks the chosen regions as being |
722 // "in_collection_set", and links them together. The head and number of | |
723 // the collection set are available via access methods. | |
10405 | 724 void finalize_cset(double target_pause_time_ms, EvacuationInfo& evacuation_info); |
342 | 725 |
726 // The head of the list (via "next_in_collection_set()") representing the | |
727 // current collection set. | |
728 HeapRegion* collection_set() { return _collection_set; } | |
729 | |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
730 void clear_collection_set() { _collection_set = NULL; } |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
731 |
4090
a88de71c4e3a
7097002: G1: remove a lot of unused / redundant code from the G1CollectorPolicy class
tonyp
parents:
4023
diff
changeset
|
732 // Add old region "hr" to the CSet. |
a88de71c4e3a
7097002: G1: remove a lot of unused / redundant code from the G1CollectorPolicy class
tonyp
parents:
4023
diff
changeset
|
733 void add_old_region_to_cset(HeapRegion* hr); |
342 | 734 |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
735 // Incremental CSet Support |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
736 |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
737 // The head of the incrementally built collection set. |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
738 HeapRegion* inc_cset_head() { return _inc_cset_head; } |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
739 |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
740 // The tail of the incrementally built collection set. |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
741 HeapRegion* inc_set_tail() { return _inc_cset_tail; } |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
742 |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
743 // Initialize incremental collection set info. |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
744 void start_incremental_cset_building(); |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
745 |
4727
67fdcb391461
7119027: G1: use atomics to update RS length / predict time of inc CSet
tonyp
parents:
4710
diff
changeset
|
746 // Perform any final calculations on the incremental CSet fields |
67fdcb391461
7119027: G1: use atomics to update RS length / predict time of inc CSet
tonyp
parents:
4710
diff
changeset
|
747 // before we can use them. |
67fdcb391461
7119027: G1: use atomics to update RS length / predict time of inc CSet
tonyp
parents:
4710
diff
changeset
|
748 void finalize_incremental_cset_building(); |
67fdcb391461
7119027: G1: use atomics to update RS length / predict time of inc CSet
tonyp
parents:
4710
diff
changeset
|
749 |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
750 void clear_incremental_cset() { |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
751 _inc_cset_head = NULL; |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
752 _inc_cset_tail = NULL; |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
753 } |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
754 |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
755 // Stop adding regions to the incremental collection set |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
756 void stop_incremental_cset_building() { _inc_cset_build_state = Inactive; } |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
757 |
4727
67fdcb391461
7119027: G1: use atomics to update RS length / predict time of inc CSet
tonyp
parents:
4710
diff
changeset
|
758 // Add information about hr to the aggregated information for the |
67fdcb391461
7119027: G1: use atomics to update RS length / predict time of inc CSet
tonyp
parents:
4710
diff
changeset
|
759 // incrementally built collection set. |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
760 void add_to_incremental_cset_info(HeapRegion* hr, size_t rs_length); |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
761 |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
762 // Update information about hr in the aggregated information for |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
763 // the incrementally built collection set. |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
764 void update_incremental_cset_info(HeapRegion* hr, size_t new_rs_length); |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
765 |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
766 private: |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
767 // Update the incremental cset information when adding a region |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
768 // (should not be called directly). |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
769 void add_region_to_incremental_cset_common(HeapRegion* hr); |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
770 |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
771 public: |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
772 // Add hr to the LHS of the incremental collection set. |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
773 void add_region_to_incremental_cset_lhs(HeapRegion* hr); |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
774 |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
775 // Add hr to the RHS of the incremental collection set. |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
776 void add_region_to_incremental_cset_rhs(HeapRegion* hr); |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
777 |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
778 #ifndef PRODUCT |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
779 void print_collection_set(HeapRegion* list_head, outputStream* st); |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
780 #endif // !PRODUCT |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
781 |
1359
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
782 bool initiate_conc_mark_if_possible() { return _initiate_conc_mark_if_possible; } |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
783 void set_initiate_conc_mark_if_possible() { _initiate_conc_mark_if_possible = true; } |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
784 void clear_initiate_conc_mark_if_possible() { _initiate_conc_mark_if_possible = false; } |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
785 |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
786 bool during_initial_mark_pause() { return _during_initial_mark_pause; } |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
787 void set_during_initial_mark_pause() { _during_initial_mark_pause = true; } |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
788 void clear_during_initial_mark_pause(){ _during_initial_mark_pause = false; } |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
789 |
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
790 // This sets the initiate_conc_mark_if_possible() flag to start a |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
791 // new cycle, as long as we are not already in one. It's best if it |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
792 // is called during a safepoint when the test whether a cycle is in |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
793 // progress or not is stable. |
3914
20213c8a3c40
7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents:
3868
diff
changeset
|
794 bool force_initial_mark_if_outside_cycle(GCCause::Cause gc_cause); |
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
795 |
1359
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
796 // This is called at the very beginning of an evacuation pause (it |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
797 // has to be the first thing that the pause does). If |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
798 // initiate_conc_mark_if_possible() is true, and the concurrent |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
799 // marking thread has completed its work during the previous cycle, |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
800 // it will set during_initial_mark_pause() to so that the pause does |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
801 // the initial-mark work and start a marking cycle. |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
802 void decide_on_conc_mark_initiation(); |
342 | 803 |
804 // If an expansion would be appropriate, because recent GC overhead had | |
805 // exceeded the desired limit, return an amount to expand by. | |
4013 | 806 size_t expansion_amount(); |
342 | 807 |
808 // Print tracing information. | |
809 void print_tracing_info() const; | |
810 | |
811 // Print stats on young survival ratio | |
812 void print_yg_surv_rate_info() const; | |
813 | |
545 | 814 void finished_recalculating_age_indexes(bool is_survivors) { |
815 if (is_survivors) { | |
816 _survivor_surv_rate_group->finished_recalculating_age_indexes(); | |
817 } else { | |
818 _short_lived_surv_rate_group->finished_recalculating_age_indexes(); | |
819 } | |
342 | 820 // do that for any other surv rate groups |
821 } | |
822 | |
17727 | 823 size_t young_list_target_length() const { return _young_list_target_length; } |
824 | |
1973 | 825 bool is_young_list_full() { |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
5988
diff
changeset
|
826 uint young_list_length = _g1->young_list()->length(); |
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
5988
diff
changeset
|
827 uint young_list_target_length = _young_list_target_length; |
1991
016a3628c885
6994056: G1: when GC locker is active, extend the Eden instead of allocating into the old gen
tonyp
parents:
1973
diff
changeset
|
828 return young_list_length >= young_list_target_length; |
016a3628c885
6994056: G1: when GC locker is active, extend the Eden instead of allocating into the old gen
tonyp
parents:
1973
diff
changeset
|
829 } |
016a3628c885
6994056: G1: when GC locker is active, extend the Eden instead of allocating into the old gen
tonyp
parents:
1973
diff
changeset
|
830 |
016a3628c885
6994056: G1: when GC locker is active, extend the Eden instead of allocating into the old gen
tonyp
parents:
1973
diff
changeset
|
831 bool can_expand_young_list() { |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
5988
diff
changeset
|
832 uint young_list_length = _g1->young_list()->length(); |
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
5988
diff
changeset
|
833 uint young_list_max_length = _young_list_max_length; |
1991
016a3628c885
6994056: G1: when GC locker is active, extend the Eden instead of allocating into the old gen
tonyp
parents:
1973
diff
changeset
|
834 return young_list_length < young_list_max_length; |
016a3628c885
6994056: G1: when GC locker is active, extend the Eden instead of allocating into the old gen
tonyp
parents:
1973
diff
changeset
|
835 } |
1973 | 836 |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
5988
diff
changeset
|
837 uint young_list_max_length() { |
3980
8229bd737950
7075646: G1: fix inconsistencies in the monitoring data
tonyp
parents:
3979
diff
changeset
|
838 return _young_list_max_length; |
8229bd737950
7075646: G1: fix inconsistencies in the monitoring data
tonyp
parents:
3979
diff
changeset
|
839 } |
8229bd737950
7075646: G1: fix inconsistencies in the monitoring data
tonyp
parents:
3979
diff
changeset
|
840 |
4710 | 841 bool gcs_are_young() { |
842 return _gcs_are_young; | |
342 | 843 } |
4710 | 844 void set_gcs_are_young(bool gcs_are_young) { |
845 _gcs_are_young = gcs_are_young; | |
342 | 846 } |
847 | |
848 bool adaptive_young_list_length() { | |
4729
1cbe7978b021
7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx
brutisso
parents:
4727
diff
changeset
|
849 return _young_gen_sizer->adaptive_young_list_length(); |
342 | 850 } |
851 | |
4013 | 852 private: |
342 | 853 // |
854 // Survivor regions policy. | |
855 // | |
856 | |
857 // Current tenuring threshold, set to 0 if the collector reaches the | |
6818 | 858 // maximum amount of survivors regions. |
859 uint _tenuring_threshold; | |
342 | 860 |
545 | 861 // The limit on the number of regions allocated for survivors. |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
5988
diff
changeset
|
862 uint _max_survivor_regions; |
545 | 863 |
3764
053d84a76d3d
7032531: G1: enhance GC logging to include more accurate eden / survivor size transitions
tonyp
parents:
2430
diff
changeset
|
864 // For reporting purposes. |
10291
48391ab0687e
8010738: G1: Output for full GCs with +PrintGCDetails should contain perm gen size/meta data change info
johnc
parents:
10098
diff
changeset
|
865 // The value of _heap_bytes_before_gc is also used to calculate |
48391ab0687e
8010738: G1: Output for full GCs with +PrintGCDetails should contain perm gen size/meta data change info
johnc
parents:
10098
diff
changeset
|
866 // the cost of copying. |
48391ab0687e
8010738: G1: Output for full GCs with +PrintGCDetails should contain perm gen size/meta data change info
johnc
parents:
10098
diff
changeset
|
867 |
48391ab0687e
8010738: G1: Output for full GCs with +PrintGCDetails should contain perm gen size/meta data change info
johnc
parents:
10098
diff
changeset
|
868 size_t _eden_used_bytes_before_gc; // Eden occupancy before GC |
48391ab0687e
8010738: G1: Output for full GCs with +PrintGCDetails should contain perm gen size/meta data change info
johnc
parents:
10098
diff
changeset
|
869 size_t _survivor_used_bytes_before_gc; // Survivor occupancy before GC |
48391ab0687e
8010738: G1: Output for full GCs with +PrintGCDetails should contain perm gen size/meta data change info
johnc
parents:
10098
diff
changeset
|
870 size_t _heap_used_bytes_before_gc; // Heap occupancy before GC |
48391ab0687e
8010738: G1: Output for full GCs with +PrintGCDetails should contain perm gen size/meta data change info
johnc
parents:
10098
diff
changeset
|
871 size_t _metaspace_used_bytes_before_gc; // Metaspace occupancy before GC |
48391ab0687e
8010738: G1: Output for full GCs with +PrintGCDetails should contain perm gen size/meta data change info
johnc
parents:
10098
diff
changeset
|
872 |
48391ab0687e
8010738: G1: Output for full GCs with +PrintGCDetails should contain perm gen size/meta data change info
johnc
parents:
10098
diff
changeset
|
873 size_t _eden_capacity_bytes_before_gc; // Eden capacity before GC |
48391ab0687e
8010738: G1: Output for full GCs with +PrintGCDetails should contain perm gen size/meta data change info
johnc
parents:
10098
diff
changeset
|
874 size_t _heap_capacity_bytes_before_gc; // Heap capacity before GC |
3764
053d84a76d3d
7032531: G1: enhance GC logging to include more accurate eden / survivor size transitions
tonyp
parents:
2430
diff
changeset
|
875 |
6818 | 876 // The amount of survivor regions after a collection. |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
5988
diff
changeset
|
877 uint _recorded_survivor_regions; |
545 | 878 // List of survivor regions. |
879 HeapRegion* _recorded_survivor_head; | |
880 HeapRegion* _recorded_survivor_tail; | |
881 | |
882 ageTable _survivors_age_table; | |
883 | |
342 | 884 public: |
10405 | 885 uint tenuring_threshold() const { return _tenuring_threshold; } |
342 | 886 |
887 inline GCAllocPurpose | |
6818 | 888 evacuation_destination(HeapRegion* src_region, uint age, size_t word_sz) { |
342 | 889 if (age < _tenuring_threshold && src_region->is_young()) { |
890 return GCAllocForSurvived; | |
891 } else { | |
892 return GCAllocForTenured; | |
893 } | |
894 } | |
895 | |
896 inline bool track_object_age(GCAllocPurpose purpose) { | |
897 return purpose == GCAllocForSurvived; | |
898 } | |
899 | |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
5988
diff
changeset
|
900 static const uint REGIONS_UNLIMITED = (uint) -1; |
545 | 901 |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
5988
diff
changeset
|
902 uint max_regions(int purpose); |
342 | 903 |
904 // The limit on regions for a particular purpose is reached. | |
905 void note_alloc_region_limit_reached(int purpose) { | |
906 if (purpose == GCAllocForSurvived) { | |
907 _tenuring_threshold = 0; | |
908 } | |
909 } | |
910 | |
911 void note_start_adding_survivor_regions() { | |
912 _survivor_surv_rate_group->start_adding_regions(); | |
913 } | |
914 | |
915 void note_stop_adding_survivor_regions() { | |
916 _survivor_surv_rate_group->stop_adding_regions(); | |
917 } | |
545 | 918 |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
5988
diff
changeset
|
919 void record_survivor_regions(uint regions, |
545 | 920 HeapRegion* head, |
921 HeapRegion* tail) { | |
922 _recorded_survivor_regions = regions; | |
923 _recorded_survivor_head = head; | |
924 _recorded_survivor_tail = tail; | |
925 } | |
926 | |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
5988
diff
changeset
|
927 uint recorded_survivor_regions() { |
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
794
diff
changeset
|
928 return _recorded_survivor_regions; |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
794
diff
changeset
|
929 } |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
794
diff
changeset
|
930 |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
5988
diff
changeset
|
931 void record_thread_age_table(ageTable* age_table) { |
545 | 932 _survivors_age_table.merge_par(age_table); |
933 } | |
934 | |
3919
4f41766176cf
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
3914
diff
changeset
|
935 void update_max_gc_locker_expansion(); |
1991
016a3628c885
6994056: G1: when GC locker is active, extend the Eden instead of allocating into the old gen
tonyp
parents:
1973
diff
changeset
|
936 |
545 | 937 // Calculates survivor space parameters. |
3919
4f41766176cf
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
3914
diff
changeset
|
938 void update_survivors_policy(); |
545 | 939 |
13060
8f07aa079343
8016309: assert(eden_size > 0 && survivor_size > 0) failed: just checking
jwilhelm
parents:
13059
diff
changeset
|
940 virtual void post_heap_initialize(); |
342 | 941 }; |
942 | |
943 // This should move to some place more general... | |
944 | |
945 // If we have "n" measurements, and we've kept track of their "sum" and the | |
946 // "sum_of_squares" of the measurements, this returns the variance of the | |
947 // sequence. | |
948 inline double variance(int n, double sum_of_squares, double sum) { | |
949 double n_d = (double)n; | |
950 double avg = sum/n_d; | |
951 return (sum_of_squares - 2.0 * avg * sum + n_d * avg * avg) / n_d; | |
952 } | |
953 | |
1972 | 954 #endif // SHARE_VM_GC_IMPLEMENTATION_G1_G1COLLECTORPOLICY_HPP |