Mercurial > hg > truffle
annotate src/share/vm/gc_implementation/g1/g1CollectorPolicy.hpp @ 5935:a735aec54ea4
7123170: JCK vm/jvmti/ResourceExhausted/resexh001/resexh00101/ tests fails since 7u4 b02
Summary: The JVMTI ResourceExhausted events must be generated in all places where OOME is thrown
Reviewed-by: acorn, coleenp, dcubed, dholmes, dsamersoff, jwilhelm, tonyp
Contributed-by: serguei.spitsyn@oracle.com
author | sspitsyn |
---|---|
date | Wed, 14 Mar 2012 20:06:48 -0700 |
parents | a9647476d1a4 |
children | 9a9bb0010c91 |
rev | line source |
---|---|
342 | 1 /* |
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4729
diff
changeset
|
2 * Copyright (c) 2001, 2012, 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; | |
39 | |
40 // Yes, this is a bit unpleasant... but it saves replicating the same thing | |
41 // over and over again and introducing subtle problems through small typos and | |
42 // cutting and pasting mistakes. The macros below introduces a number | |
43 // sequnce into the following two classes and the methods that access it. | |
44 | |
45 #define define_num_seq(name) \ | |
46 private: \ | |
47 NumberSeq _all_##name##_times_ms; \ | |
48 public: \ | |
49 void record_##name##_time_ms(double ms) { \ | |
50 _all_##name##_times_ms.add(ms); \ | |
51 } \ | |
52 NumberSeq* get_##name##_seq() { \ | |
53 return &_all_##name##_times_ms; \ | |
54 } | |
55 | |
56 class MainBodySummary; | |
57 | |
549
fe3d7c11b4b7
6700941: G1: allocation spec missing for some G1 classes
apetrusenko
parents:
545
diff
changeset
|
58 class PauseSummary: public CHeapObj { |
342 | 59 define_num_seq(total) |
60 define_num_seq(other) | |
61 | |
62 public: | |
63 virtual MainBodySummary* main_body_summary() { return NULL; } | |
64 }; | |
65 | |
549
fe3d7c11b4b7
6700941: G1: allocation spec missing for some G1 classes
apetrusenko
parents:
545
diff
changeset
|
66 class MainBodySummary: public CHeapObj { |
342 | 67 define_num_seq(satb_drain) // optional |
4837
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4834
diff
changeset
|
68 define_num_seq(root_region_scan_wait) |
342 | 69 define_num_seq(parallel) // parallel only |
70 define_num_seq(ext_root_scan) | |
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4729
diff
changeset
|
71 define_num_seq(satb_filtering) |
342 | 72 define_num_seq(update_rs) |
73 define_num_seq(scan_rs) | |
74 define_num_seq(obj_copy) | |
75 define_num_seq(termination) // parallel only | |
76 define_num_seq(parallel_other) // parallel only | |
77 define_num_seq(mark_closure) | |
4023 | 78 define_num_seq(clear_ct) |
342 | 79 }; |
80 | |
677 | 81 class Summary: public PauseSummary, |
82 public MainBodySummary { | |
342 | 83 public: |
84 virtual MainBodySummary* main_body_summary() { return this; } | |
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 |
1cbe7978b021
7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx
brutisso
parents:
4727
diff
changeset
|
97 // line we should allow the young gen to be between |
1cbe7978b021
7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx
brutisso
parents:
4727
diff
changeset
|
98 // G1DefaultMinNewGenPercent and G1DefaultMaxNewGenPercent of the |
1cbe7978b021
7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx
brutisso
parents:
4727
diff
changeset
|
99 // heap size. This means that every time the heap size changes the |
1cbe7978b021
7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx
brutisso
parents:
4727
diff
changeset
|
100 // limits for the young gen size will be updated. |
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 |
1cbe7978b021
7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx
brutisso
parents:
4727
diff
changeset
|
103 // minimum size for young gen. Still using G1DefaultMaxNewGenPercent |
1cbe7978b021
7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx
brutisso
parents:
4727
diff
changeset
|
104 // of the heap as maximum. |
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 |
1cbe7978b021
7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx
brutisso
parents:
4727
diff
changeset
|
107 // maximum size for young gen. Still using G1DefaultMinNewGenPercent |
1cbe7978b021
7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx
brutisso
parents:
4727
diff
changeset
|
108 // of the heap as minimum. |
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.) |
1cbe7978b021
7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx
brutisso
parents:
4727
diff
changeset
|
123 class G1YoungGenSizer : public CHeapObj { |
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; |
1cbe7978b021
7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx
brutisso
parents:
4727
diff
changeset
|
133 size_t _min_desired_young_length; |
1cbe7978b021
7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx
brutisso
parents:
4727
diff
changeset
|
134 size_t _max_desired_young_length; |
1cbe7978b021
7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx
brutisso
parents:
4727
diff
changeset
|
135 bool _adaptive_size; |
1cbe7978b021
7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx
brutisso
parents:
4727
diff
changeset
|
136 size_t calculate_default_min_length(size_t new_number_of_heap_regions); |
1cbe7978b021
7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx
brutisso
parents:
4727
diff
changeset
|
137 size_t calculate_default_max_length(size_t new_number_of_heap_regions); |
1cbe7978b021
7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx
brutisso
parents:
4727
diff
changeset
|
138 |
1cbe7978b021
7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx
brutisso
parents:
4727
diff
changeset
|
139 public: |
1cbe7978b021
7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx
brutisso
parents:
4727
diff
changeset
|
140 G1YoungGenSizer(); |
1cbe7978b021
7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx
brutisso
parents:
4727
diff
changeset
|
141 void heap_size_changed(size_t new_number_of_heap_regions); |
1cbe7978b021
7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx
brutisso
parents:
4727
diff
changeset
|
142 size_t min_desired_young_length() { |
1cbe7978b021
7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx
brutisso
parents:
4727
diff
changeset
|
143 return _min_desired_young_length; |
1cbe7978b021
7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx
brutisso
parents:
4727
diff
changeset
|
144 } |
1cbe7978b021
7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx
brutisso
parents:
4727
diff
changeset
|
145 size_t max_desired_young_length() { |
1cbe7978b021
7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx
brutisso
parents:
4727
diff
changeset
|
146 return _max_desired_young_length; |
1cbe7978b021
7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx
brutisso
parents:
4727
diff
changeset
|
147 } |
1cbe7978b021
7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx
brutisso
parents:
4727
diff
changeset
|
148 bool adaptive_young_list_length() { |
1cbe7978b021
7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx
brutisso
parents:
4727
diff
changeset
|
149 return _adaptive_size; |
1cbe7978b021
7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx
brutisso
parents:
4727
diff
changeset
|
150 } |
1cbe7978b021
7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx
brutisso
parents:
4727
diff
changeset
|
151 }; |
1cbe7978b021
7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx
brutisso
parents:
4727
diff
changeset
|
152 |
342 | 153 class G1CollectorPolicy: public CollectorPolicy { |
4013 | 154 private: |
342 | 155 // either equal to the number of parallel threads, if ParallelGCThreads |
156 // has been set, or 1 otherwise | |
157 int _parallel_gc_threads; | |
158 | |
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
159 // The number of GC threads currently active. |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
160 uintx _no_of_gc_threads; |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
161 |
342 | 162 enum SomePrivateConstants { |
942
2c79770d1f6e
6819085: G1: use larger and/or user settable region size
tonyp
parents:
936
diff
changeset
|
163 NumPrevPausesForHeuristics = 10 |
342 | 164 }; |
165 | |
166 G1MMUTracker* _mmu_tracker; | |
167 | |
168 void initialize_flags(); | |
169 | |
170 void initialize_all() { | |
171 initialize_flags(); | |
172 initialize_size_info(); | |
173 initialize_perm_generation(PermGen::MarkSweepCompact); | |
174 } | |
175 | |
4013 | 176 CollectionSetChooser* _collectionSetChooser; |
342 | 177 |
178 double _cur_collection_start_sec; | |
179 size_t _cur_collection_pause_used_at_start_bytes; | |
180 size_t _cur_collection_pause_used_regions_at_start; | |
181 double _cur_collection_par_time_ms; | |
182 double _cur_satb_drain_time_ms; | |
183 double _cur_clear_ct_time_ms; | |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3920
diff
changeset
|
184 double _cur_ref_proc_time_ms; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3920
diff
changeset
|
185 double _cur_ref_enq_time_ms; |
342 | 186 |
890
6cb8e9df7174
6819077: G1: first GC thread coming late into the GC.
johnc
parents:
838
diff
changeset
|
187 #ifndef PRODUCT |
6cb8e9df7174
6819077: G1: first GC thread coming late into the GC.
johnc
parents:
838
diff
changeset
|
188 // Card Table Count Cache stats |
6cb8e9df7174
6819077: G1: first GC thread coming late into the GC.
johnc
parents:
838
diff
changeset
|
189 double _min_clear_cc_time_ms; // min |
6cb8e9df7174
6819077: G1: first GC thread coming late into the GC.
johnc
parents:
838
diff
changeset
|
190 double _max_clear_cc_time_ms; // max |
6cb8e9df7174
6819077: G1: first GC thread coming late into the GC.
johnc
parents:
838
diff
changeset
|
191 double _cur_clear_cc_time_ms; // clearing time during current pause |
6cb8e9df7174
6819077: G1: first GC thread coming late into the GC.
johnc
parents:
838
diff
changeset
|
192 double _cum_clear_cc_time_ms; // cummulative clearing time |
6cb8e9df7174
6819077: G1: first GC thread coming late into the GC.
johnc
parents:
838
diff
changeset
|
193 jlong _num_cc_clears; // number of times the card count cache has been cleared |
6cb8e9df7174
6819077: G1: first GC thread coming late into the GC.
johnc
parents:
838
diff
changeset
|
194 #endif |
6cb8e9df7174
6819077: G1: first GC thread coming late into the GC.
johnc
parents:
838
diff
changeset
|
195 |
342 | 196 // These exclude marking times. |
197 TruncatedSeq* _recent_gc_times_ms; | |
198 | |
199 TruncatedSeq* _concurrent_mark_remark_times_ms; | |
200 TruncatedSeq* _concurrent_mark_cleanup_times_ms; | |
201 | |
677 | 202 Summary* _summary; |
342 | 203 |
204 NumberSeq* _all_pause_times_ms; | |
205 NumberSeq* _all_full_gc_times_ms; | |
206 double _stop_world_start; | |
207 NumberSeq* _all_stop_world_times_ms; | |
208 NumberSeq* _all_yield_times_ms; | |
209 | |
210 int _aux_num; | |
211 NumberSeq* _all_aux_times_ms; | |
212 double* _cur_aux_start_times_ms; | |
213 double* _cur_aux_times_ms; | |
214 bool* _cur_aux_times_set; | |
215 | |
1611 | 216 double* _par_last_gc_worker_start_times_ms; |
342 | 217 double* _par_last_ext_root_scan_times_ms; |
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4729
diff
changeset
|
218 double* _par_last_satb_filtering_times_ms; |
342 | 219 double* _par_last_update_rs_times_ms; |
220 double* _par_last_update_rs_processed_buffers; | |
221 double* _par_last_scan_rs_times_ms; | |
222 double* _par_last_obj_copy_times_ms; | |
223 double* _par_last_termination_times_ms; | |
1611 | 224 double* _par_last_termination_attempts; |
225 double* _par_last_gc_worker_end_times_ms; | |
2430 | 226 double* _par_last_gc_worker_times_ms; |
342 | 227 |
4023 | 228 // Each workers 'other' time i.e. the elapsed time of the parallel |
229 // phase of the pause minus the sum of the individual sub-phase | |
230 // times for a given worker thread. | |
231 double* _par_last_gc_worker_other_times_ms; | |
232 | |
4710 | 233 // indicates whether we are in young or mixed GC mode |
234 bool _gcs_are_young; | |
342 | 235 |
236 size_t _young_list_target_length; | |
237 size_t _young_list_fixed_length; | |
3920
af2ab04e0038
6929868: G1: introduce min / max young gen size bounds
brutisso
parents:
3919
diff
changeset
|
238 size_t _prev_eden_capacity; // used for logging |
342 | 239 |
1991
016a3628c885
6994056: G1: when GC locker is active, extend the Eden instead of allocating into the old gen
tonyp
parents:
1973
diff
changeset
|
240 // 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
|
241 // locker is active. This should be >= _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
|
242 size_t _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
|
243 |
4710 | 244 bool _last_gc_was_young; |
342 | 245 |
4710 | 246 unsigned _young_pause_num; |
247 unsigned _mixed_pause_num; | |
342 | 248 |
249 bool _during_marking; | |
250 bool _in_marking_window; | |
251 bool _in_marking_window_im; | |
252 | |
253 SurvRateGroup* _short_lived_surv_rate_group; | |
254 SurvRateGroup* _survivor_surv_rate_group; | |
255 // add here any more surv rate groups | |
256 | |
1356 | 257 double _gc_overhead_perc; |
258 | |
3919
4f41766176cf
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
3914
diff
changeset
|
259 double _reserve_factor; |
4f41766176cf
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
3914
diff
changeset
|
260 size_t _reserve_regions; |
4f41766176cf
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
3914
diff
changeset
|
261 |
342 | 262 bool during_marking() { |
263 return _during_marking; | |
264 } | |
265 | |
266 private: | |
267 enum PredictionConstants { | |
268 TruncatedSeqLength = 10 | |
269 }; | |
270 | |
271 TruncatedSeq* _alloc_rate_ms_seq; | |
272 double _prev_collection_pause_end_ms; | |
273 | |
274 TruncatedSeq* _pending_card_diff_seq; | |
275 TruncatedSeq* _rs_length_diff_seq; | |
276 TruncatedSeq* _cost_per_card_ms_seq; | |
4710 | 277 TruncatedSeq* _young_cards_per_entry_ratio_seq; |
278 TruncatedSeq* _mixed_cards_per_entry_ratio_seq; | |
342 | 279 TruncatedSeq* _cost_per_entry_ms_seq; |
4710 | 280 TruncatedSeq* _mixed_cost_per_entry_ms_seq; |
342 | 281 TruncatedSeq* _cost_per_byte_ms_seq; |
282 TruncatedSeq* _constant_other_time_ms_seq; | |
283 TruncatedSeq* _young_other_cost_per_region_ms_seq; | |
284 TruncatedSeq* _non_young_other_cost_per_region_ms_seq; | |
285 | |
286 TruncatedSeq* _pending_cards_seq; | |
287 TruncatedSeq* _rs_lengths_seq; | |
288 | |
289 TruncatedSeq* _cost_per_byte_ms_during_cm_seq; | |
290 | |
291 TruncatedSeq* _young_gc_eff_seq; | |
292 | |
4729
1cbe7978b021
7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx
brutisso
parents:
4727
diff
changeset
|
293 G1YoungGenSizer* _young_gen_sizer; |
3920
af2ab04e0038
6929868: G1: introduce min / max young gen size bounds
brutisso
parents:
3919
diff
changeset
|
294 |
4090
a88de71c4e3a
7097002: G1: remove a lot of unused / redundant code from the G1CollectorPolicy class
tonyp
parents:
4023
diff
changeset
|
295 size_t _eden_cset_region_length; |
a88de71c4e3a
7097002: G1: remove a lot of unused / redundant code from the G1CollectorPolicy class
tonyp
parents:
4023
diff
changeset
|
296 size_t _survivor_cset_region_length; |
a88de71c4e3a
7097002: G1: remove a lot of unused / redundant code from the G1CollectorPolicy class
tonyp
parents:
4023
diff
changeset
|
297 size_t _old_cset_region_length; |
a88de71c4e3a
7097002: G1: remove a lot of unused / redundant code from the G1CollectorPolicy class
tonyp
parents:
4023
diff
changeset
|
298 |
a88de71c4e3a
7097002: G1: remove a lot of unused / redundant code from the G1CollectorPolicy class
tonyp
parents:
4023
diff
changeset
|
299 void init_cset_region_lengths(size_t eden_cset_region_length, |
a88de71c4e3a
7097002: G1: remove a lot of unused / redundant code from the G1CollectorPolicy class
tonyp
parents:
4023
diff
changeset
|
300 size_t survivor_cset_region_length); |
a88de71c4e3a
7097002: G1: remove a lot of unused / redundant code from the G1CollectorPolicy class
tonyp
parents:
4023
diff
changeset
|
301 |
a88de71c4e3a
7097002: G1: remove a lot of unused / redundant code from the G1CollectorPolicy class
tonyp
parents:
4023
diff
changeset
|
302 size_t eden_cset_region_length() { return _eden_cset_region_length; } |
a88de71c4e3a
7097002: G1: remove a lot of unused / redundant code from the G1CollectorPolicy class
tonyp
parents:
4023
diff
changeset
|
303 size_t survivor_cset_region_length() { return _survivor_cset_region_length; } |
a88de71c4e3a
7097002: G1: remove a lot of unused / redundant code from the G1CollectorPolicy class
tonyp
parents:
4023
diff
changeset
|
304 size_t old_cset_region_length() { return _old_cset_region_length; } |
342 | 305 |
306 size_t _free_regions_at_end_of_collection; | |
307 | |
308 size_t _recorded_rs_lengths; | |
309 size_t _max_rs_lengths; | |
310 | |
311 double _recorded_young_free_cset_time_ms; | |
312 double _recorded_non_young_free_cset_time_ms; | |
313 | |
314 double _sigma; | |
315 | |
316 size_t _rs_lengths_prediction; | |
317 | |
318 size_t _known_garbage_bytes; | |
319 double _known_garbage_ratio; | |
320 | |
4912
a9647476d1a4
7132029: G1: mixed GC phase lasts for longer than it should
tonyp
parents:
4837
diff
changeset
|
321 double sigma() { return _sigma; } |
342 | 322 |
323 // A function that prevents us putting too much stock in small sample | |
324 // sets. Returns a number between 2.0 and 1.0, depending on the number | |
325 // of samples. 5 or more samples yields one; fewer scales linearly from | |
326 // 2.0 at 1 sample to 1.0 at 5. | |
327 double confidence_factor(int samples) { | |
328 if (samples > 4) return 1.0; | |
329 else return 1.0 + sigma() * ((double)(5 - samples))/2.0; | |
330 } | |
331 | |
332 double get_new_neg_prediction(TruncatedSeq* seq) { | |
333 return seq->davg() - sigma() * seq->dsd(); | |
334 } | |
335 | |
336 #ifndef PRODUCT | |
337 bool verify_young_ages(HeapRegion* head, SurvRateGroup *surv_rate_group); | |
338 #endif // PRODUCT | |
339 | |
1111 | 340 void adjust_concurrent_refinement(double update_rs_time, |
341 double update_rs_processed_buffers, | |
342 double goal_ms); | |
343 | |
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
344 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
|
345 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
|
346 |
342 | 347 double _pause_time_target_ms; |
348 double _recorded_young_cset_choice_time_ms; | |
349 double _recorded_non_young_cset_choice_time_ms; | |
350 size_t _pending_cards; | |
351 size_t _max_pending_cards; | |
352 | |
353 public: | |
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
354 // Accessors |
342 | 355 |
4090
a88de71c4e3a
7097002: G1: remove a lot of unused / redundant code from the G1CollectorPolicy class
tonyp
parents:
4023
diff
changeset
|
356 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
|
357 hr->set_young(); |
342 | 358 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
|
359 hr->set_young_index_in_cset(young_index_in_cset); |
342 | 360 } |
361 | |
4090
a88de71c4e3a
7097002: G1: remove a lot of unused / redundant code from the G1CollectorPolicy class
tonyp
parents:
4023
diff
changeset
|
362 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
|
363 assert(hr->is_young() && hr->is_survivor(), "pre-condition"); |
342 | 364 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
|
365 hr->set_young_index_in_cset(young_index_in_cset); |
342 | 366 } |
367 | |
368 #ifndef PRODUCT | |
369 bool verify_young_ages(); | |
370 #endif // PRODUCT | |
371 | |
372 double get_new_prediction(TruncatedSeq* seq) { | |
373 return MAX2(seq->davg() + sigma() * seq->dsd(), | |
374 seq->davg() * confidence_factor(seq->num())); | |
375 } | |
376 | |
377 void record_max_rs_lengths(size_t rs_lengths) { | |
378 _max_rs_lengths = rs_lengths; | |
379 } | |
380 | |
381 size_t predict_pending_card_diff() { | |
382 double prediction = get_new_neg_prediction(_pending_card_diff_seq); | |
4710 | 383 if (prediction < 0.00001) { |
342 | 384 return 0; |
4710 | 385 } else { |
342 | 386 return (size_t) prediction; |
4710 | 387 } |
342 | 388 } |
389 | |
390 size_t predict_pending_cards() { | |
391 size_t max_pending_card_num = _g1->max_pending_card_num(); | |
392 size_t diff = predict_pending_card_diff(); | |
393 size_t prediction; | |
4710 | 394 if (diff > max_pending_card_num) { |
342 | 395 prediction = max_pending_card_num; |
4710 | 396 } else { |
342 | 397 prediction = max_pending_card_num - diff; |
4710 | 398 } |
342 | 399 |
400 return prediction; | |
401 } | |
402 | |
403 size_t predict_rs_length_diff() { | |
404 return (size_t) get_new_prediction(_rs_length_diff_seq); | |
405 } | |
406 | |
407 double predict_alloc_rate_ms() { | |
408 return get_new_prediction(_alloc_rate_ms_seq); | |
409 } | |
410 | |
411 double predict_cost_per_card_ms() { | |
412 return get_new_prediction(_cost_per_card_ms_seq); | |
413 } | |
414 | |
415 double predict_rs_update_time_ms(size_t pending_cards) { | |
416 return (double) pending_cards * predict_cost_per_card_ms(); | |
417 } | |
418 | |
4710 | 419 double predict_young_cards_per_entry_ratio() { |
420 return get_new_prediction(_young_cards_per_entry_ratio_seq); | |
342 | 421 } |
422 | |
4710 | 423 double predict_mixed_cards_per_entry_ratio() { |
424 if (_mixed_cards_per_entry_ratio_seq->num() < 2) { | |
425 return predict_young_cards_per_entry_ratio(); | |
426 } else { | |
427 return get_new_prediction(_mixed_cards_per_entry_ratio_seq); | |
428 } | |
342 | 429 } |
430 | |
431 size_t predict_young_card_num(size_t rs_length) { | |
432 return (size_t) ((double) rs_length * | |
4710 | 433 predict_young_cards_per_entry_ratio()); |
342 | 434 } |
435 | |
436 size_t predict_non_young_card_num(size_t rs_length) { | |
437 return (size_t) ((double) rs_length * | |
4710 | 438 predict_mixed_cards_per_entry_ratio()); |
342 | 439 } |
440 | |
441 double predict_rs_scan_time_ms(size_t card_num) { | |
4710 | 442 if (gcs_are_young()) { |
342 | 443 return (double) card_num * get_new_prediction(_cost_per_entry_ms_seq); |
4710 | 444 } else { |
445 return predict_mixed_rs_scan_time_ms(card_num); | |
446 } | |
342 | 447 } |
448 | |
4710 | 449 double predict_mixed_rs_scan_time_ms(size_t card_num) { |
450 if (_mixed_cost_per_entry_ms_seq->num() < 3) { | |
342 | 451 return (double) card_num * get_new_prediction(_cost_per_entry_ms_seq); |
4710 | 452 } else { |
453 return (double) (card_num * | |
454 get_new_prediction(_mixed_cost_per_entry_ms_seq)); | |
455 } | |
342 | 456 } |
457 | |
458 double predict_object_copy_time_ms_during_cm(size_t bytes_to_copy) { | |
4710 | 459 if (_cost_per_byte_ms_during_cm_seq->num() < 3) { |
460 return (1.1 * (double) bytes_to_copy) * | |
461 get_new_prediction(_cost_per_byte_ms_seq); | |
462 } else { | |
342 | 463 return (double) bytes_to_copy * |
4710 | 464 get_new_prediction(_cost_per_byte_ms_during_cm_seq); |
465 } | |
342 | 466 } |
467 | |
468 double predict_object_copy_time_ms(size_t bytes_to_copy) { | |
4710 | 469 if (_in_marking_window && !_in_marking_window_im) { |
342 | 470 return predict_object_copy_time_ms_during_cm(bytes_to_copy); |
4710 | 471 } else { |
342 | 472 return (double) bytes_to_copy * |
4710 | 473 get_new_prediction(_cost_per_byte_ms_seq); |
474 } | |
342 | 475 } |
476 | |
477 double predict_constant_other_time_ms() { | |
478 return get_new_prediction(_constant_other_time_ms_seq); | |
479 } | |
480 | |
481 double predict_young_other_time_ms(size_t young_num) { | |
4710 | 482 return (double) young_num * |
483 get_new_prediction(_young_other_cost_per_region_ms_seq); | |
342 | 484 } |
485 | |
486 double predict_non_young_other_time_ms(size_t non_young_num) { | |
4710 | 487 return (double) non_young_num * |
488 get_new_prediction(_non_young_other_cost_per_region_ms_seq); | |
342 | 489 } |
490 | |
491 double predict_young_collection_elapsed_time_ms(size_t adjustment); | |
492 double predict_base_elapsed_time_ms(size_t pending_cards); | |
493 double predict_base_elapsed_time_ms(size_t pending_cards, | |
494 size_t scanned_cards); | |
495 size_t predict_bytes_to_copy(HeapRegion* hr); | |
496 double predict_region_elapsed_time_ms(HeapRegion* hr, bool young); | |
497 | |
4090
a88de71c4e3a
7097002: G1: remove a lot of unused / redundant code from the G1CollectorPolicy class
tonyp
parents:
4023
diff
changeset
|
498 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
|
499 |
4090
a88de71c4e3a
7097002: G1: remove a lot of unused / redundant code from the G1CollectorPolicy class
tonyp
parents:
4023
diff
changeset
|
500 size_t cset_region_length() { return young_cset_region_length() + |
a88de71c4e3a
7097002: G1: remove a lot of unused / redundant code from the G1CollectorPolicy class
tonyp
parents:
4023
diff
changeset
|
501 old_cset_region_length(); } |
a88de71c4e3a
7097002: G1: remove a lot of unused / redundant code from the G1CollectorPolicy class
tonyp
parents:
4023
diff
changeset
|
502 size_t young_cset_region_length() { return eden_cset_region_length() + |
a88de71c4e3a
7097002: G1: remove a lot of unused / redundant code from the G1CollectorPolicy class
tonyp
parents:
4023
diff
changeset
|
503 survivor_cset_region_length(); } |
342 | 504 |
505 void record_young_free_cset_time_ms(double time_ms) { | |
506 _recorded_young_free_cset_time_ms = time_ms; | |
507 } | |
508 | |
509 void record_non_young_free_cset_time_ms(double time_ms) { | |
510 _recorded_non_young_free_cset_time_ms = time_ms; | |
511 } | |
512 | |
513 double predict_young_gc_eff() { | |
514 return get_new_neg_prediction(_young_gc_eff_seq); | |
515 } | |
516 | |
545 | 517 double predict_survivor_regions_evac_time(); |
518 | |
342 | 519 void cset_regions_freed() { |
4710 | 520 bool propagate = _last_gc_was_young && !_in_marking_window; |
342 | 521 _short_lived_surv_rate_group->all_surviving_words_recorded(propagate); |
522 _survivor_surv_rate_group->all_surviving_words_recorded(propagate); | |
523 // also call it on any more surv rate groups | |
524 } | |
525 | |
526 void set_known_garbage_bytes(size_t known_garbage_bytes) { | |
527 _known_garbage_bytes = known_garbage_bytes; | |
528 size_t heap_bytes = _g1->capacity(); | |
529 _known_garbage_ratio = (double) _known_garbage_bytes / (double) heap_bytes; | |
530 } | |
531 | |
532 void decrease_known_garbage_bytes(size_t known_garbage_bytes) { | |
533 guarantee( _known_garbage_bytes >= known_garbage_bytes, "invariant" ); | |
534 | |
535 _known_garbage_bytes -= known_garbage_bytes; | |
536 size_t heap_bytes = _g1->capacity(); | |
537 _known_garbage_ratio = (double) _known_garbage_bytes / (double) heap_bytes; | |
538 } | |
539 | |
540 G1MMUTracker* mmu_tracker() { | |
541 return _mmu_tracker; | |
542 } | |
543 | |
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
544 double max_pause_time_ms() { |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
545 return _mmu_tracker->max_gc_time() * 1000.0; |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
546 } |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
547 |
342 | 548 double predict_remark_time_ms() { |
549 return get_new_prediction(_concurrent_mark_remark_times_ms); | |
550 } | |
551 | |
552 double predict_cleanup_time_ms() { | |
553 return get_new_prediction(_concurrent_mark_cleanup_times_ms); | |
554 } | |
555 | |
556 // Returns an estimate of the survival rate of the region at yg-age | |
557 // "yg_age". | |
545 | 558 double predict_yg_surv_rate(int age, SurvRateGroup* surv_rate_group) { |
559 TruncatedSeq* seq = surv_rate_group->get_seq(age); | |
342 | 560 if (seq->num() == 0) |
561 gclog_or_tty->print("BARF! age is %d", age); | |
562 guarantee( seq->num() > 0, "invariant" ); | |
563 double pred = get_new_prediction(seq); | |
564 if (pred > 1.0) | |
565 pred = 1.0; | |
566 return pred; | |
567 } | |
568 | |
545 | 569 double predict_yg_surv_rate(int age) { |
570 return predict_yg_surv_rate(age, _short_lived_surv_rate_group); | |
571 } | |
572 | |
342 | 573 double accum_yg_surv_rate_pred(int age) { |
574 return _short_lived_surv_rate_group->accum_surv_rate_pred(age); | |
575 } | |
576 | |
4013 | 577 private: |
1611 | 578 void print_stats(int level, const char* str, double value); |
579 void print_stats(int level, const char* str, int value); | |
580 | |
2430 | 581 void print_par_stats(int level, const char* str, double* data); |
582 void print_par_sizes(int level, const char* str, double* data); | |
342 | 583 |
584 void check_other_times(int level, | |
585 NumberSeq* other_times_ms, | |
586 NumberSeq* calc_other_times_ms) const; | |
587 | |
588 void print_summary (PauseSummary* stats) const; | |
589 | |
590 void print_summary (int level, const char* str, NumberSeq* seq) const; | |
591 void print_summary_sd (int level, const char* str, NumberSeq* seq) const; | |
592 | |
593 double avg_value (double* data); | |
594 double max_value (double* data); | |
595 double sum_of_values (double* data); | |
596 double max_sum (double* data1, double* data2); | |
597 | |
598 double _last_pause_time_ms; | |
599 | |
600 size_t _bytes_in_collection_set_before_gc; | |
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3823
diff
changeset
|
601 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
|
602 |
342 | 603 // Used to count used bytes in CS. |
604 friend class CountCSClosure; | |
605 | |
606 // Statistics kept per GC stoppage, pause or full. | |
607 TruncatedSeq* _recent_prev_end_times_for_all_gcs_sec; | |
608 | |
609 // Add a new GC of the given duration and end time to the record. | |
610 void update_recent_gc_times(double end_time_sec, double elapsed_ms); | |
611 | |
612 // 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
|
613 // 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
|
614 // set at the start of the pause. |
342 | 615 HeapRegion* _collection_set; |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
616 |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
617 // 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
|
618 // the incrementally built collection set at the start of an evacuation |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
619 // pause. |
342 | 620 size_t _collection_set_bytes_used_before; |
621 | |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
622 // 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
|
623 // 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
|
624 // 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
|
625 |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
626 enum CSetBuildType { |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
627 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
|
628 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
|
629 }; |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
630 |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
631 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
|
632 |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
633 // 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
|
634 HeapRegion* _inc_cset_head; |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
635 |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
636 // 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
|
637 HeapRegion* _inc_cset_tail; |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
638 |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
639 // 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
|
640 // 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
|
641 // an evacuation pause. |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
642 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
|
643 |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
644 // 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
|
645 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
|
646 |
4727
67fdcb391461
7119027: G1: use atomics to update RS length / predict time of inc CSet
tonyp
parents:
4710
diff
changeset
|
647 // 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
|
648 // 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
|
649 // 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
|
650 // 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
|
651 // 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
|
652 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
|
653 |
4727
67fdcb391461
7119027: G1: use atomics to update RS length / predict time of inc CSet
tonyp
parents:
4710
diff
changeset
|
654 // 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
|
655 // 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
|
656 // 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
|
657 // 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
|
658 // _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
|
659 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
|
660 |
67fdcb391461
7119027: G1: use atomics to update RS length / predict time of inc CSet
tonyp
parents:
4710
diff
changeset
|
661 // 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
|
662 // 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
|
663 // 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
|
664 // MT-safety assumptions. |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
665 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
|
666 |
4727
67fdcb391461
7119027: G1: use atomics to update RS length / predict time of inc CSet
tonyp
parents:
4710
diff
changeset
|
667 // 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
|
668 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
|
669 |
342 | 670 // Stash a pointer to the g1 heap. |
671 G1CollectedHeap* _g1; | |
672 | |
673 // The ratio of gc time to elapsed time, computed over recent pauses. | |
674 double _recent_avg_pause_time_ratio; | |
675 | |
676 double recent_avg_pause_time_ratio() { | |
677 return _recent_avg_pause_time_ratio; | |
678 } | |
679 | |
1359
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
680 // 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
|
681 // 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
|
682 // 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
|
683 // 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
|
684 // 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
|
685 // 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
|
686 // 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
|
687 // work. |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
688 volatile bool _initiate_conc_mark_if_possible; |
342 | 689 |
1359
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
690 // 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
|
691 // 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
|
692 // 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
|
693 // 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
|
694 // previous marking cycle (e.g., clearing the next marking |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
695 // 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
|
696 // 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
|
697 // 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
|
698 // 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
|
699 // 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
|
700 // 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
|
701 // 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
|
702 // initial-mark work. |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
703 volatile bool _during_initial_mark_pause; |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
704 |
4710 | 705 bool _last_young_gc; |
342 | 706 |
707 // This set of variables tracks the collector efficiency, in order to | |
708 // determine whether we should initiate a new marking. | |
709 double _cur_mark_stop_world_time_ms; | |
710 double _mark_remark_start_sec; | |
711 double _mark_cleanup_start_sec; | |
712 double _mark_closure_time_ms; | |
4837
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4834
diff
changeset
|
713 double _root_region_scan_wait_time_ms; |
342 | 714 |
3919
4f41766176cf
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
3914
diff
changeset
|
715 // 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
|
716 // 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
|
717 // 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
|
718 // 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
|
719 // 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
|
720 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
|
721 |
4f41766176cf
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
3914
diff
changeset
|
722 // 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
|
723 // 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
|
724 // to the user's inputs. |
4f41766176cf
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
3914
diff
changeset
|
725 size_t calculate_young_list_desired_min_length(size_t base_min_length); |
4f41766176cf
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
3914
diff
changeset
|
726 |
4f41766176cf
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
3914
diff
changeset
|
727 // 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
|
728 // 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
|
729 // to the user's inputs. |
4f41766176cf
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
3914
diff
changeset
|
730 size_t calculate_young_list_desired_max_length(); |
4f41766176cf
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
3914
diff
changeset
|
731 |
4f41766176cf
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
3914
diff
changeset
|
732 // 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
|
733 // 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
|
734 // 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
|
735 // 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
|
736 // 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
|
737 // max young list length according to the user's inputs. |
4f41766176cf
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
3914
diff
changeset
|
738 size_t calculate_young_list_target_length(size_t rs_lengths, |
4f41766176cf
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
3914
diff
changeset
|
739 size_t base_min_length, |
4f41766176cf
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
3914
diff
changeset
|
740 size_t desired_min_length, |
4f41766176cf
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
3914
diff
changeset
|
741 size_t desired_max_length); |
4f41766176cf
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
3914
diff
changeset
|
742 |
4f41766176cf
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
3914
diff
changeset
|
743 // 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
|
744 // 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
|
745 // 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
|
746 // 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
|
747 // calculate_young_list_target_length(). |
4f41766176cf
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
3914
diff
changeset
|
748 bool predict_will_fit(size_t young_length, double base_time_ms, |
4f41766176cf
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
3914
diff
changeset
|
749 size_t base_free_regions, double target_pause_time_ms); |
342 | 750 |
4013 | 751 // Count the number of bytes used in the CS. |
752 void count_CS_bytes_used(); | |
753 | |
342 | 754 public: |
755 | |
756 G1CollectorPolicy(); | |
757 | |
758 virtual G1CollectorPolicy* as_g1_policy() { return this; } | |
759 | |
760 virtual CollectorPolicy::Name kind() { | |
761 return CollectorPolicy::G1CollectorPolicyKind; | |
762 } | |
763 | |
3919
4f41766176cf
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
3914
diff
changeset
|
764 // 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
|
765 // 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
|
766 // 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
|
767 void revise_young_list_target_length_if_necessary(); |
342 | 768 |
769 size_t bytes_in_collection_set() { | |
770 return _bytes_in_collection_set_before_gc; | |
771 } | |
772 | |
773 unsigned calc_gc_alloc_time_stamp() { | |
774 return _all_pause_times_ms->num() + 1; | |
775 } | |
776 | |
3920
af2ab04e0038
6929868: G1: introduce min / max young gen size bounds
brutisso
parents:
3919
diff
changeset
|
777 // This should be called after the heap is resized. |
af2ab04e0038
6929868: G1: introduce min / max young gen size bounds
brutisso
parents:
3919
diff
changeset
|
778 void record_new_heap_size(size_t new_number_of_regions); |
3919
4f41766176cf
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
3914
diff
changeset
|
779 |
4013 | 780 void init(); |
342 | 781 |
545 | 782 // Create jstat counters for the policy. |
783 virtual void initialize_gc_policy_counters(); | |
784 | |
342 | 785 virtual HeapWord* mem_allocate_work(size_t size, |
786 bool is_tlab, | |
787 bool* gc_overhead_limit_was_exceeded); | |
788 | |
789 // This method controls how a collector handles one or more | |
790 // of its generations being fully allocated. | |
791 virtual HeapWord* satisfy_failed_allocation(size_t size, | |
792 bool is_tlab); | |
793 | |
794 BarrierSet::Name barrier_set_name() { return BarrierSet::G1SATBCTLogging; } | |
795 | |
796 GenRemSet::Name rem_set_name() { return GenRemSet::CardTable; } | |
797 | |
4834
6a78aa6ac1ff
7132311: G1: assert((s == klass->oop_size(this)) || (Universe::heap()->is_gc_active() && ((is_typeArray()...
brutisso
parents:
4829
diff
changeset
|
798 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
|
799 |
342 | 800 // Update the heuristic info to record a collection pause of the given |
801 // start time, where the given number of bytes were used at the start. | |
802 // This may involve changing the desired size of a collection set. | |
803 | |
4013 | 804 void record_stop_world_start(); |
342 | 805 |
4013 | 806 void record_collection_pause_start(double start_time_sec, size_t start_used); |
342 | 807 |
808 // Must currently be called while the world is stopped. | |
3867
ff53346271fe
6814390: G1: remove the concept of non-generational G1
brutisso
parents:
3830
diff
changeset
|
809 void record_concurrent_mark_init_end(double |
342 | 810 mark_init_elapsed_time_ms); |
811 | |
4097
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4096
diff
changeset
|
812 void record_mark_closure_time(double mark_closure_time_ms) { |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4096
diff
changeset
|
813 _mark_closure_time_ms = mark_closure_time_ms; |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4096
diff
changeset
|
814 } |
342 | 815 |
4837
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4834
diff
changeset
|
816 void record_root_region_scan_wait_time(double time_ms) { |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4834
diff
changeset
|
817 _root_region_scan_wait_time_ms = time_ms; |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4834
diff
changeset
|
818 } |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4834
diff
changeset
|
819 |
4013 | 820 void record_concurrent_mark_remark_start(); |
821 void record_concurrent_mark_remark_end(); | |
342 | 822 |
4013 | 823 void record_concurrent_mark_cleanup_start(); |
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
824 void record_concurrent_mark_cleanup_end(int no_of_gc_threads); |
4013 | 825 void record_concurrent_mark_cleanup_completed(); |
342 | 826 |
4013 | 827 void record_concurrent_pause(); |
828 void record_concurrent_pause_end(); | |
342 | 829 |
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
830 void record_collection_pause_end(int no_of_gc_threads); |
3764
053d84a76d3d
7032531: G1: enhance GC logging to include more accurate eden / survivor size transitions
tonyp
parents:
2430
diff
changeset
|
831 void print_heap_transition(); |
342 | 832 |
833 // Record the fact that a full collection occurred. | |
4013 | 834 void record_full_collection_start(); |
835 void record_full_collection_end(); | |
342 | 836 |
1611 | 837 void record_gc_worker_start_time(int worker_i, double ms) { |
838 _par_last_gc_worker_start_times_ms[worker_i] = ms; | |
839 } | |
840 | |
342 | 841 void record_ext_root_scan_time(int worker_i, double ms) { |
842 _par_last_ext_root_scan_times_ms[worker_i] = ms; | |
843 } | |
844 | |
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4729
diff
changeset
|
845 void record_satb_filtering_time(int worker_i, double ms) { |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4729
diff
changeset
|
846 _par_last_satb_filtering_times_ms[worker_i] = ms; |
342 | 847 } |
848 | |
849 void record_satb_drain_time(double ms) { | |
4023 | 850 assert(_g1->mark_in_progress(), "shouldn't be here otherwise"); |
342 | 851 _cur_satb_drain_time_ms = ms; |
852 } | |
853 | |
854 void record_update_rs_time(int thread, double ms) { | |
855 _par_last_update_rs_times_ms[thread] = ms; | |
856 } | |
857 | |
858 void record_update_rs_processed_buffers (int thread, | |
859 double processed_buffers) { | |
860 _par_last_update_rs_processed_buffers[thread] = processed_buffers; | |
861 } | |
862 | |
863 void record_scan_rs_time(int thread, double ms) { | |
864 _par_last_scan_rs_times_ms[thread] = ms; | |
865 } | |
866 | |
867 void reset_obj_copy_time(int thread) { | |
868 _par_last_obj_copy_times_ms[thread] = 0.0; | |
869 } | |
870 | |
871 void reset_obj_copy_time() { | |
872 reset_obj_copy_time(0); | |
873 } | |
874 | |
875 void record_obj_copy_time(int thread, double ms) { | |
876 _par_last_obj_copy_times_ms[thread] += ms; | |
877 } | |
878 | |
1611 | 879 void record_termination(int thread, double ms, size_t attempts) { |
880 _par_last_termination_times_ms[thread] = ms; | |
881 _par_last_termination_attempts[thread] = (double) attempts; | |
342 | 882 } |
883 | |
1611 | 884 void record_gc_worker_end_time(int worker_i, double ms) { |
885 _par_last_gc_worker_end_times_ms[worker_i] = ms; | |
342 | 886 } |
887 | |
595
3698e8f47799
6804746: G1: guarantee(variance() > -1.0,"variance should be >= 0") (due to evacuation failure)
tonyp
parents:
549
diff
changeset
|
888 void record_pause_time_ms(double ms) { |
342 | 889 _last_pause_time_ms = ms; |
890 } | |
891 | |
892 void record_clear_ct_time(double ms) { | |
893 _cur_clear_ct_time_ms = ms; | |
894 } | |
895 | |
896 void record_par_time(double ms) { | |
897 _cur_collection_par_time_ms = ms; | |
898 } | |
899 | |
900 void record_aux_start_time(int i) { | |
901 guarantee(i < _aux_num, "should be within range"); | |
902 _cur_aux_start_times_ms[i] = os::elapsedTime() * 1000.0; | |
903 } | |
904 | |
905 void record_aux_end_time(int i) { | |
906 guarantee(i < _aux_num, "should be within range"); | |
907 double ms = os::elapsedTime() * 1000.0 - _cur_aux_start_times_ms[i]; | |
908 _cur_aux_times_set[i] = true; | |
909 _cur_aux_times_ms[i] += ms; | |
910 } | |
911 | |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3920
diff
changeset
|
912 void record_ref_proc_time(double ms) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3920
diff
changeset
|
913 _cur_ref_proc_time_ms = ms; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3920
diff
changeset
|
914 } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3920
diff
changeset
|
915 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3920
diff
changeset
|
916 void record_ref_enq_time(double ms) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3920
diff
changeset
|
917 _cur_ref_enq_time_ms = ms; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3920
diff
changeset
|
918 } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3920
diff
changeset
|
919 |
890
6cb8e9df7174
6819077: G1: first GC thread coming late into the GC.
johnc
parents:
838
diff
changeset
|
920 #ifndef PRODUCT |
6cb8e9df7174
6819077: G1: first GC thread coming late into the GC.
johnc
parents:
838
diff
changeset
|
921 void record_cc_clear_time(double ms) { |
6cb8e9df7174
6819077: G1: first GC thread coming late into the GC.
johnc
parents:
838
diff
changeset
|
922 if (_min_clear_cc_time_ms < 0.0 || ms <= _min_clear_cc_time_ms) |
6cb8e9df7174
6819077: G1: first GC thread coming late into the GC.
johnc
parents:
838
diff
changeset
|
923 _min_clear_cc_time_ms = ms; |
6cb8e9df7174
6819077: G1: first GC thread coming late into the GC.
johnc
parents:
838
diff
changeset
|
924 if (_max_clear_cc_time_ms < 0.0 || ms >= _max_clear_cc_time_ms) |
6cb8e9df7174
6819077: G1: first GC thread coming late into the GC.
johnc
parents:
838
diff
changeset
|
925 _max_clear_cc_time_ms = ms; |
6cb8e9df7174
6819077: G1: first GC thread coming late into the GC.
johnc
parents:
838
diff
changeset
|
926 _cur_clear_cc_time_ms = ms; |
6cb8e9df7174
6819077: G1: first GC thread coming late into the GC.
johnc
parents:
838
diff
changeset
|
927 _cum_clear_cc_time_ms += ms; |
6cb8e9df7174
6819077: G1: first GC thread coming late into the GC.
johnc
parents:
838
diff
changeset
|
928 _num_cc_clears++; |
6cb8e9df7174
6819077: G1: first GC thread coming late into the GC.
johnc
parents:
838
diff
changeset
|
929 } |
6cb8e9df7174
6819077: G1: first GC thread coming late into the GC.
johnc
parents:
838
diff
changeset
|
930 #endif |
6cb8e9df7174
6819077: G1: first GC thread coming late into the GC.
johnc
parents:
838
diff
changeset
|
931 |
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3823
diff
changeset
|
932 // 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
|
933 // 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
|
934 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
|
935 _bytes_copied_during_gc += bytes; |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3823
diff
changeset
|
936 } |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3823
diff
changeset
|
937 |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3823
diff
changeset
|
938 // 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
|
939 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
|
940 return _bytes_copied_during_gc; |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3823
diff
changeset
|
941 } |
342 | 942 |
4912
a9647476d1a4
7132029: G1: mixed GC phase lasts for longer than it should
tonyp
parents:
4837
diff
changeset
|
943 // Determine whether the next GC should be mixed. Called to determine |
a9647476d1a4
7132029: G1: mixed GC phase lasts for longer than it should
tonyp
parents:
4837
diff
changeset
|
944 // whether to start mixed GCs or whether to carry on doing mixed |
a9647476d1a4
7132029: G1: mixed GC phase lasts for longer than it should
tonyp
parents:
4837
diff
changeset
|
945 // GCs. The two action strings are used in the ergo output when the |
a9647476d1a4
7132029: G1: mixed GC phase lasts for longer than it should
tonyp
parents:
4837
diff
changeset
|
946 // method returns true or false. |
a9647476d1a4
7132029: G1: mixed GC phase lasts for longer than it should
tonyp
parents:
4837
diff
changeset
|
947 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
|
948 const char* false_action_str); |
a9647476d1a4
7132029: G1: mixed GC phase lasts for longer than it should
tonyp
parents:
4837
diff
changeset
|
949 |
342 | 950 // Choose a new collection set. Marks the chosen regions as being |
951 // "in_collection_set", and links them together. The head and number of | |
952 // the collection set are available via access methods. | |
4912
a9647476d1a4
7132029: G1: mixed GC phase lasts for longer than it should
tonyp
parents:
4837
diff
changeset
|
953 void finalize_cset(double target_pause_time_ms); |
342 | 954 |
955 // The head of the list (via "next_in_collection_set()") representing the | |
956 // current collection set. | |
957 HeapRegion* collection_set() { return _collection_set; } | |
958 | |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
959 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
|
960 |
4090
a88de71c4e3a
7097002: G1: remove a lot of unused / redundant code from the G1CollectorPolicy class
tonyp
parents:
4023
diff
changeset
|
961 // 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
|
962 void add_old_region_to_cset(HeapRegion* hr); |
342 | 963 |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
964 // Incremental CSet Support |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
965 |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
966 // 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
|
967 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
|
968 |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
969 // 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
|
970 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
|
971 |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
972 // 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
|
973 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
|
974 |
4727
67fdcb391461
7119027: G1: use atomics to update RS length / predict time of inc CSet
tonyp
parents:
4710
diff
changeset
|
975 // 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
|
976 // before we can use them. |
67fdcb391461
7119027: G1: use atomics to update RS length / predict time of inc CSet
tonyp
parents:
4710
diff
changeset
|
977 void finalize_incremental_cset_building(); |
67fdcb391461
7119027: G1: use atomics to update RS length / predict time of inc CSet
tonyp
parents:
4710
diff
changeset
|
978 |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
979 void clear_incremental_cset() { |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
980 _inc_cset_head = NULL; |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
981 _inc_cset_tail = NULL; |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
982 } |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
983 |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
984 // 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
|
985 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
|
986 |
4727
67fdcb391461
7119027: G1: use atomics to update RS length / predict time of inc CSet
tonyp
parents:
4710
diff
changeset
|
987 // 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
|
988 // 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
|
989 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
|
990 |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
991 // 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
|
992 // 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
|
993 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
|
994 |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
995 private: |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
996 // 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
|
997 // (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
|
998 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
|
999 |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
1000 public: |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
1001 // 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
|
1002 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
|
1003 |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
1004 // 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
|
1005 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
|
1006 |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
1007 #ifndef PRODUCT |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
1008 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
|
1009 #endif // !PRODUCT |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
1010 |
1359
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
1011 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
|
1012 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
|
1013 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
|
1014 |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
1015 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
|
1016 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
|
1017 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
|
1018 |
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
1019 // 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
|
1020 // 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
|
1021 // 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
|
1022 // 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
|
1023 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
|
1024 |
1359
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
1025 // 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
|
1026 // 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
|
1027 // 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
|
1028 // 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
|
1029 // 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
|
1030 // the initial-mark work and start a marking cycle. |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
1031 void decide_on_conc_mark_initiation(); |
342 | 1032 |
1033 // If an expansion would be appropriate, because recent GC overhead had | |
1034 // exceeded the desired limit, return an amount to expand by. | |
4013 | 1035 size_t expansion_amount(); |
342 | 1036 |
1037 #ifndef PRODUCT | |
1038 // Check any appropriate marked bytes info, asserting false if | |
1039 // something's wrong, else returning "true". | |
4013 | 1040 bool assertMarkedBytesDataOK(); |
342 | 1041 #endif |
1042 | |
1043 // Print tracing information. | |
1044 void print_tracing_info() const; | |
1045 | |
1046 // Print stats on young survival ratio | |
1047 void print_yg_surv_rate_info() const; | |
1048 | |
545 | 1049 void finished_recalculating_age_indexes(bool is_survivors) { |
1050 if (is_survivors) { | |
1051 _survivor_surv_rate_group->finished_recalculating_age_indexes(); | |
1052 } else { | |
1053 _short_lived_surv_rate_group->finished_recalculating_age_indexes(); | |
1054 } | |
342 | 1055 // do that for any other surv rate groups |
1056 } | |
1057 | |
1973 | 1058 bool is_young_list_full() { |
1059 size_t young_list_length = _g1->young_list()->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
|
1060 size_t young_list_target_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
|
1061 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
|
1062 } |
016a3628c885
6994056: G1: when GC locker is active, extend the Eden instead of allocating into the old gen
tonyp
parents:
1973
diff
changeset
|
1063 |
016a3628c885
6994056: G1: when GC locker is active, extend the Eden instead of allocating into the old gen
tonyp
parents:
1973
diff
changeset
|
1064 bool can_expand_young_list() { |
016a3628c885
6994056: G1: when GC locker is active, extend the Eden instead of allocating into the old gen
tonyp
parents:
1973
diff
changeset
|
1065 size_t young_list_length = _g1->young_list()->length(); |
016a3628c885
6994056: G1: when GC locker is active, extend the Eden instead of allocating into the old gen
tonyp
parents:
1973
diff
changeset
|
1066 size_t young_list_max_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
|
1067 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
|
1068 } |
1973 | 1069 |
3980
8229bd737950
7075646: G1: fix inconsistencies in the monitoring data
tonyp
parents:
3979
diff
changeset
|
1070 size_t young_list_max_length() { |
8229bd737950
7075646: G1: fix inconsistencies in the monitoring data
tonyp
parents:
3979
diff
changeset
|
1071 return _young_list_max_length; |
8229bd737950
7075646: G1: fix inconsistencies in the monitoring data
tonyp
parents:
3979
diff
changeset
|
1072 } |
8229bd737950
7075646: G1: fix inconsistencies in the monitoring data
tonyp
parents:
3979
diff
changeset
|
1073 |
4710 | 1074 bool gcs_are_young() { |
1075 return _gcs_are_young; | |
342 | 1076 } |
4710 | 1077 void set_gcs_are_young(bool gcs_are_young) { |
1078 _gcs_are_young = gcs_are_young; | |
342 | 1079 } |
1080 | |
1081 bool adaptive_young_list_length() { | |
4729
1cbe7978b021
7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx
brutisso
parents:
4727
diff
changeset
|
1082 return _young_gen_sizer->adaptive_young_list_length(); |
342 | 1083 } |
1084 | |
1085 inline double get_gc_eff_factor() { | |
1086 double ratio = _known_garbage_ratio; | |
1087 | |
1088 double square = ratio * ratio; | |
1089 // square = square * square; | |
1090 double ret = square * 9.0 + 1.0; | |
1091 #if 0 | |
1092 gclog_or_tty->print_cr("ratio = %1.2lf, ret = %1.2lf", ratio, ret); | |
1093 #endif // 0 | |
1094 guarantee(0.0 <= ret && ret < 10.0, "invariant!"); | |
1095 return ret; | |
1096 } | |
1097 | |
4013 | 1098 private: |
342 | 1099 // |
1100 // Survivor regions policy. | |
1101 // | |
1102 | |
1103 // Current tenuring threshold, set to 0 if the collector reaches the | |
1104 // maximum amount of suvivors regions. | |
1105 int _tenuring_threshold; | |
1106 | |
545 | 1107 // The limit on the number of regions allocated for survivors. |
1108 size_t _max_survivor_regions; | |
1109 | |
3764
053d84a76d3d
7032531: G1: enhance GC logging to include more accurate eden / survivor size transitions
tonyp
parents:
2430
diff
changeset
|
1110 // For reporting purposes. |
053d84a76d3d
7032531: G1: enhance GC logging to include more accurate eden / survivor size transitions
tonyp
parents:
2430
diff
changeset
|
1111 size_t _eden_bytes_before_gc; |
053d84a76d3d
7032531: G1: enhance GC logging to include more accurate eden / survivor size transitions
tonyp
parents:
2430
diff
changeset
|
1112 size_t _survivor_bytes_before_gc; |
053d84a76d3d
7032531: G1: enhance GC logging to include more accurate eden / survivor size transitions
tonyp
parents:
2430
diff
changeset
|
1113 size_t _capacity_before_gc; |
053d84a76d3d
7032531: G1: enhance GC logging to include more accurate eden / survivor size transitions
tonyp
parents:
2430
diff
changeset
|
1114 |
545 | 1115 // The amount of survor regions after a collection. |
1116 size_t _recorded_survivor_regions; | |
1117 // List of survivor regions. | |
1118 HeapRegion* _recorded_survivor_head; | |
1119 HeapRegion* _recorded_survivor_tail; | |
1120 | |
1121 ageTable _survivors_age_table; | |
1122 | |
342 | 1123 public: |
1124 | |
1125 inline GCAllocPurpose | |
1126 evacuation_destination(HeapRegion* src_region, int age, size_t word_sz) { | |
1127 if (age < _tenuring_threshold && src_region->is_young()) { | |
1128 return GCAllocForSurvived; | |
1129 } else { | |
1130 return GCAllocForTenured; | |
1131 } | |
1132 } | |
1133 | |
1134 inline bool track_object_age(GCAllocPurpose purpose) { | |
1135 return purpose == GCAllocForSurvived; | |
1136 } | |
1137 | |
545 | 1138 static const size_t REGIONS_UNLIMITED = ~(size_t)0; |
1139 | |
1140 size_t max_regions(int purpose); | |
342 | 1141 |
1142 // The limit on regions for a particular purpose is reached. | |
1143 void note_alloc_region_limit_reached(int purpose) { | |
1144 if (purpose == GCAllocForSurvived) { | |
1145 _tenuring_threshold = 0; | |
1146 } | |
1147 } | |
1148 | |
1149 void note_start_adding_survivor_regions() { | |
1150 _survivor_surv_rate_group->start_adding_regions(); | |
1151 } | |
1152 | |
1153 void note_stop_adding_survivor_regions() { | |
1154 _survivor_surv_rate_group->stop_adding_regions(); | |
1155 } | |
545 | 1156 |
1157 void record_survivor_regions(size_t regions, | |
1158 HeapRegion* head, | |
1159 HeapRegion* tail) { | |
1160 _recorded_survivor_regions = regions; | |
1161 _recorded_survivor_head = head; | |
1162 _recorded_survivor_tail = tail; | |
1163 } | |
1164 | |
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
794
diff
changeset
|
1165 size_t recorded_survivor_regions() { |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
794
diff
changeset
|
1166 return _recorded_survivor_regions; |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
794
diff
changeset
|
1167 } |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
794
diff
changeset
|
1168 |
545 | 1169 void record_thread_age_table(ageTable* age_table) |
1170 { | |
1171 _survivors_age_table.merge_par(age_table); | |
1172 } | |
1173 | |
3919
4f41766176cf
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
3914
diff
changeset
|
1174 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
|
1175 |
545 | 1176 // Calculates survivor space parameters. |
3919
4f41766176cf
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
3914
diff
changeset
|
1177 void update_survivors_policy(); |
545 | 1178 |
342 | 1179 }; |
1180 | |
1181 // This should move to some place more general... | |
1182 | |
1183 // If we have "n" measurements, and we've kept track of their "sum" and the | |
1184 // "sum_of_squares" of the measurements, this returns the variance of the | |
1185 // sequence. | |
1186 inline double variance(int n, double sum_of_squares, double sum) { | |
1187 double n_d = (double)n; | |
1188 double avg = sum/n_d; | |
1189 return (sum_of_squares - 2.0 * avg * sum + n_d * avg * avg) / n_d; | |
1190 } | |
1191 | |
1972 | 1192 #endif // SHARE_VM_GC_IMPLEMENTATION_G1_G1COLLECTORPOLICY_HPP |