Mercurial > hg > graal-jvmci-8
annotate src/share/vm/memory/collectorPolicy.cpp @ 13059:46d7652b223c
8026853: Prepare GC code for collector policy regression fix
Summary: Cleanup related to the NewSize and MaxNewSize bugs
Reviewed-by: tschatzl, jcoomes, ehelin
author | jwilhelm |
---|---|
date | Mon, 21 Oct 2013 18:56:20 +0200 |
parents | 3aee6bc29547 |
children | 8f07aa079343 |
rev | line source |
---|---|
0 | 1 /* |
8013
95ccff9eee8e
6348447: Specifying -XX:OldSize crashes 64-bit VMs
jwilhelm
parents:
7451
diff
changeset
|
2 * Copyright (c) 2001, 2013, Oracle and/or its affiliates. All rights reserved. |
0 | 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:
1387
diff
changeset
|
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
trims
parents:
1387
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:
1387
diff
changeset
|
21 * questions. |
0 | 22 * |
23 */ | |
24 | |
1972 | 25 #include "precompiled.hpp" |
26 #include "gc_implementation/shared/adaptiveSizePolicy.hpp" | |
27 #include "gc_implementation/shared/gcPolicyCounters.hpp" | |
28 #include "gc_implementation/shared/vmGCOperations.hpp" | |
29 #include "memory/cardTableRS.hpp" | |
30 #include "memory/collectorPolicy.hpp" | |
31 #include "memory/gcLocker.inline.hpp" | |
32 #include "memory/genCollectedHeap.hpp" | |
33 #include "memory/generationSpec.hpp" | |
34 #include "memory/space.hpp" | |
35 #include "memory/universe.hpp" | |
36 #include "runtime/arguments.hpp" | |
37 #include "runtime/globals_extension.hpp" | |
38 #include "runtime/handles.inline.hpp" | |
39 #include "runtime/java.hpp" | |
7180
f34d701e952e
8003935: Simplify the needed includes for using Thread::current()
stefank
parents:
6923
diff
changeset
|
40 #include "runtime/thread.inline.hpp" |
1972 | 41 #include "runtime/vmThread.hpp" |
8001
db9981fd3124
8005915: Unify SERIALGC and INCLUDE_ALTERNATE_GCS
jprovino
parents:
7451
diff
changeset
|
42 #include "utilities/macros.hpp" |
db9981fd3124
8005915: Unify SERIALGC and INCLUDE_ALTERNATE_GCS
jprovino
parents:
7451
diff
changeset
|
43 #if INCLUDE_ALL_GCS |
1972 | 44 #include "gc_implementation/concurrentMarkSweep/cmsAdaptiveSizePolicy.hpp" |
45 #include "gc_implementation/concurrentMarkSweep/cmsGCAdaptivePolicyCounters.hpp" | |
8001
db9981fd3124
8005915: Unify SERIALGC and INCLUDE_ALTERNATE_GCS
jprovino
parents:
7451
diff
changeset
|
46 #endif // INCLUDE_ALL_GCS |
0 | 47 |
48 // CollectorPolicy methods. | |
49 | |
50 void CollectorPolicy::initialize_flags() { | |
12830
9b4d0569f2f4
8025852: Remove unnecessary setters in collector policy classes
jwilhelm
parents:
12350
diff
changeset
|
51 assert(_max_alignment >= _min_alignment, |
9b4d0569f2f4
8025852: Remove unnecessary setters in collector policy classes
jwilhelm
parents:
12350
diff
changeset
|
52 err_msg("max_alignment: " SIZE_FORMAT " less than min_alignment: " SIZE_FORMAT, |
9b4d0569f2f4
8025852: Remove unnecessary setters in collector policy classes
jwilhelm
parents:
12350
diff
changeset
|
53 _max_alignment, _min_alignment)); |
9b4d0569f2f4
8025852: Remove unnecessary setters in collector policy classes
jwilhelm
parents:
12350
diff
changeset
|
54 assert(_max_alignment % _min_alignment == 0, |
9b4d0569f2f4
8025852: Remove unnecessary setters in collector policy classes
jwilhelm
parents:
12350
diff
changeset
|
55 err_msg("max_alignment: " SIZE_FORMAT " not aligned by min_alignment: " SIZE_FORMAT, |
9b4d0569f2f4
8025852: Remove unnecessary setters in collector policy classes
jwilhelm
parents:
12350
diff
changeset
|
56 _max_alignment, _min_alignment)); |
10239
f14063dcd52a
8013791: G1: G1CollectorPolicy::initialize_flags() may set min_alignment > max_alignment
brutisso
parents:
10135
diff
changeset
|
57 |
10241
d17700c82d7d
8006088: Incompatible heap size flags accepted by VM
tschatzl
parents:
10239
diff
changeset
|
58 if (MaxHeapSize < InitialHeapSize) { |
d17700c82d7d
8006088: Incompatible heap size flags accepted by VM
tschatzl
parents:
10239
diff
changeset
|
59 vm_exit_during_initialization("Incompatible initial and maximum heap sizes specified"); |
d17700c82d7d
8006088: Incompatible heap size flags accepted by VM
tschatzl
parents:
10239
diff
changeset
|
60 } |
d17700c82d7d
8006088: Incompatible heap size flags accepted by VM
tschatzl
parents:
10239
diff
changeset
|
61 |
12830
9b4d0569f2f4
8025852: Remove unnecessary setters in collector policy classes
jwilhelm
parents:
12350
diff
changeset
|
62 MinHeapDeltaBytes = align_size_up(MinHeapDeltaBytes, _min_alignment); |
0 | 63 } |
64 | |
65 void CollectorPolicy::initialize_size_info() { | |
10241
d17700c82d7d
8006088: Incompatible heap size flags accepted by VM
tschatzl
parents:
10239
diff
changeset
|
66 // User inputs from -mx and ms must be aligned |
12830
9b4d0569f2f4
8025852: Remove unnecessary setters in collector policy classes
jwilhelm
parents:
12350
diff
changeset
|
67 _min_heap_byte_size = align_size_up(Arguments::min_heap_size(), _min_alignment); |
9b4d0569f2f4
8025852: Remove unnecessary setters in collector policy classes
jwilhelm
parents:
12350
diff
changeset
|
68 _initial_heap_byte_size = align_size_up(InitialHeapSize, _min_alignment); |
9b4d0569f2f4
8025852: Remove unnecessary setters in collector policy classes
jwilhelm
parents:
12350
diff
changeset
|
69 _max_heap_byte_size = align_size_up(MaxHeapSize, _max_alignment); |
0 | 70 |
71 // Check heap parameter properties | |
12830
9b4d0569f2f4
8025852: Remove unnecessary setters in collector policy classes
jwilhelm
parents:
12350
diff
changeset
|
72 if (_initial_heap_byte_size < M) { |
0 | 73 vm_exit_during_initialization("Too small initial heap"); |
74 } | |
75 // Check heap parameter properties | |
12830
9b4d0569f2f4
8025852: Remove unnecessary setters in collector policy classes
jwilhelm
parents:
12350
diff
changeset
|
76 if (_min_heap_byte_size < M) { |
0 | 77 vm_exit_during_initialization("Too small minimum heap"); |
78 } | |
12830
9b4d0569f2f4
8025852: Remove unnecessary setters in collector policy classes
jwilhelm
parents:
12350
diff
changeset
|
79 if (_initial_heap_byte_size <= NewSize) { |
0 | 80 // make sure there is at least some room in old space |
81 vm_exit_during_initialization("Too small initial heap for new size specified"); | |
82 } | |
12830
9b4d0569f2f4
8025852: Remove unnecessary setters in collector policy classes
jwilhelm
parents:
12350
diff
changeset
|
83 if (_max_heap_byte_size < _min_heap_byte_size) { |
0 | 84 vm_exit_during_initialization("Incompatible minimum and maximum heap sizes specified"); |
85 } | |
12830
9b4d0569f2f4
8025852: Remove unnecessary setters in collector policy classes
jwilhelm
parents:
12350
diff
changeset
|
86 if (_initial_heap_byte_size < _min_heap_byte_size) { |
0 | 87 vm_exit_during_initialization("Incompatible minimum and initial heap sizes specified"); |
88 } | |
12830
9b4d0569f2f4
8025852: Remove unnecessary setters in collector policy classes
jwilhelm
parents:
12350
diff
changeset
|
89 if (_max_heap_byte_size < _initial_heap_byte_size) { |
0 | 90 vm_exit_during_initialization("Incompatible initial and maximum heap sizes specified"); |
91 } | |
13
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
92 |
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
93 if (PrintGCDetails && Verbose) { |
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
94 gclog_or_tty->print_cr("Minimum heap " SIZE_FORMAT " Initial heap " |
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
95 SIZE_FORMAT " Maximum heap " SIZE_FORMAT, |
12830
9b4d0569f2f4
8025852: Remove unnecessary setters in collector policy classes
jwilhelm
parents:
12350
diff
changeset
|
96 _min_heap_byte_size, _initial_heap_byte_size, _max_heap_byte_size); |
13
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
97 } |
0 | 98 } |
99 | |
1387
0bfd3fb24150
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
jmasa
parents:
1064
diff
changeset
|
100 bool CollectorPolicy::use_should_clear_all_soft_refs(bool v) { |
0bfd3fb24150
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
jmasa
parents:
1064
diff
changeset
|
101 bool result = _should_clear_all_soft_refs; |
0bfd3fb24150
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
jmasa
parents:
1064
diff
changeset
|
102 set_should_clear_all_soft_refs(false); |
0bfd3fb24150
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
jmasa
parents:
1064
diff
changeset
|
103 return result; |
0bfd3fb24150
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
jmasa
parents:
1064
diff
changeset
|
104 } |
0 | 105 |
106 GenRemSet* CollectorPolicy::create_rem_set(MemRegion whole_heap, | |
107 int max_covered_regions) { | |
12350 | 108 return new CardTableRS(whole_heap, max_covered_regions); |
0 | 109 } |
110 | |
1387
0bfd3fb24150
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
jmasa
parents:
1064
diff
changeset
|
111 void CollectorPolicy::cleared_all_soft_refs() { |
0bfd3fb24150
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
jmasa
parents:
1064
diff
changeset
|
112 // If near gc overhear limit, continue to clear SoftRefs. SoftRefs may |
0bfd3fb24150
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
jmasa
parents:
1064
diff
changeset
|
113 // have been cleared in the last collection but if the gc overhear |
0bfd3fb24150
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
jmasa
parents:
1064
diff
changeset
|
114 // limit continues to be near, SoftRefs should still be cleared. |
0bfd3fb24150
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
jmasa
parents:
1064
diff
changeset
|
115 if (size_policy() != NULL) { |
0bfd3fb24150
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
jmasa
parents:
1064
diff
changeset
|
116 _should_clear_all_soft_refs = size_policy()->gc_overhead_limit_near(); |
0bfd3fb24150
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
jmasa
parents:
1064
diff
changeset
|
117 } |
0bfd3fb24150
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
jmasa
parents:
1064
diff
changeset
|
118 _all_soft_refs_clear = true; |
0bfd3fb24150
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
jmasa
parents:
1064
diff
changeset
|
119 } |
0bfd3fb24150
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
jmasa
parents:
1064
diff
changeset
|
120 |
12233
40136aa2cdb1
8010722: assert: failed: heap size is too big for compressed oops
tschatzl
parents:
12110
diff
changeset
|
121 size_t CollectorPolicy::compute_max_alignment() { |
40136aa2cdb1
8010722: assert: failed: heap size is too big for compressed oops
tschatzl
parents:
12110
diff
changeset
|
122 // The card marking array and the offset arrays for old generations are |
40136aa2cdb1
8010722: assert: failed: heap size is too big for compressed oops
tschatzl
parents:
12110
diff
changeset
|
123 // committed in os pages as well. Make sure they are entirely full (to |
40136aa2cdb1
8010722: assert: failed: heap size is too big for compressed oops
tschatzl
parents:
12110
diff
changeset
|
124 // avoid partial page problems), e.g. if 512 bytes heap corresponds to 1 |
40136aa2cdb1
8010722: assert: failed: heap size is too big for compressed oops
tschatzl
parents:
12110
diff
changeset
|
125 // byte entry and the os page size is 4096, the maximum heap size should |
40136aa2cdb1
8010722: assert: failed: heap size is too big for compressed oops
tschatzl
parents:
12110
diff
changeset
|
126 // be 512*4096 = 2MB aligned. |
40136aa2cdb1
8010722: assert: failed: heap size is too big for compressed oops
tschatzl
parents:
12110
diff
changeset
|
127 |
40136aa2cdb1
8010722: assert: failed: heap size is too big for compressed oops
tschatzl
parents:
12110
diff
changeset
|
128 // There is only the GenRemSet in Hotspot and only the GenRemSet::CardTable |
40136aa2cdb1
8010722: assert: failed: heap size is too big for compressed oops
tschatzl
parents:
12110
diff
changeset
|
129 // is supported. |
40136aa2cdb1
8010722: assert: failed: heap size is too big for compressed oops
tschatzl
parents:
12110
diff
changeset
|
130 // Requirements of any new remembered set implementations must be added here. |
40136aa2cdb1
8010722: assert: failed: heap size is too big for compressed oops
tschatzl
parents:
12110
diff
changeset
|
131 size_t alignment = GenRemSet::max_alignment_constraint(GenRemSet::CardTable); |
40136aa2cdb1
8010722: assert: failed: heap size is too big for compressed oops
tschatzl
parents:
12110
diff
changeset
|
132 |
40136aa2cdb1
8010722: assert: failed: heap size is too big for compressed oops
tschatzl
parents:
12110
diff
changeset
|
133 // Parallel GC does its own alignment of the generations to avoid requiring a |
40136aa2cdb1
8010722: assert: failed: heap size is too big for compressed oops
tschatzl
parents:
12110
diff
changeset
|
134 // large page (256M on some platforms) for the permanent generation. The |
40136aa2cdb1
8010722: assert: failed: heap size is too big for compressed oops
tschatzl
parents:
12110
diff
changeset
|
135 // other collectors should also be updated to do their own alignment and then |
40136aa2cdb1
8010722: assert: failed: heap size is too big for compressed oops
tschatzl
parents:
12110
diff
changeset
|
136 // this use of lcm() should be removed. |
40136aa2cdb1
8010722: assert: failed: heap size is too big for compressed oops
tschatzl
parents:
12110
diff
changeset
|
137 if (UseLargePages && !UseParallelGC) { |
40136aa2cdb1
8010722: assert: failed: heap size is too big for compressed oops
tschatzl
parents:
12110
diff
changeset
|
138 // in presence of large pages we have to make sure that our |
40136aa2cdb1
8010722: assert: failed: heap size is too big for compressed oops
tschatzl
parents:
12110
diff
changeset
|
139 // alignment is large page aware |
40136aa2cdb1
8010722: assert: failed: heap size is too big for compressed oops
tschatzl
parents:
12110
diff
changeset
|
140 alignment = lcm(os::large_page_size(), alignment); |
40136aa2cdb1
8010722: assert: failed: heap size is too big for compressed oops
tschatzl
parents:
12110
diff
changeset
|
141 } |
40136aa2cdb1
8010722: assert: failed: heap size is too big for compressed oops
tschatzl
parents:
12110
diff
changeset
|
142 |
40136aa2cdb1
8010722: assert: failed: heap size is too big for compressed oops
tschatzl
parents:
12110
diff
changeset
|
143 return alignment; |
40136aa2cdb1
8010722: assert: failed: heap size is too big for compressed oops
tschatzl
parents:
12110
diff
changeset
|
144 } |
1387
0bfd3fb24150
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
jmasa
parents:
1064
diff
changeset
|
145 |
0 | 146 // GenCollectorPolicy methods. |
147 | |
13
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
148 size_t GenCollectorPolicy::scale_by_NewRatio_aligned(size_t base_size) { |
13058
3aee6bc29547
8026852: Use restricted_align_down in collector policy code
jwilhelm
parents:
13057
diff
changeset
|
149 return align_size_down_bounded(base_size / (NewRatio + 1), _min_alignment); |
13
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
150 } |
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
151 |
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
152 size_t GenCollectorPolicy::bound_minus_alignment(size_t desired_size, |
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
153 size_t maximum_size) { |
12830
9b4d0569f2f4
8025852: Remove unnecessary setters in collector policy classes
jwilhelm
parents:
12350
diff
changeset
|
154 size_t alignment = _min_alignment; |
13
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
155 size_t max_minus = maximum_size - alignment; |
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
156 return desired_size < max_minus ? desired_size : max_minus; |
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
157 } |
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
158 |
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
159 |
0 | 160 void GenCollectorPolicy::initialize_size_policy(size_t init_eden_size, |
161 size_t init_promo_size, | |
162 size_t init_survivor_size) { | |
13059
46d7652b223c
8026853: Prepare GC code for collector policy regression fix
jwilhelm
parents:
13058
diff
changeset
|
163 const double max_gc_pause_sec = ((double) MaxGCPauseMillis) / 1000.0; |
0 | 164 _size_policy = new AdaptiveSizePolicy(init_eden_size, |
165 init_promo_size, | |
166 init_survivor_size, | |
8072
fd7b3770c77e
8007764: Wrong initialized value of max_gc_pause_sec for an instance of class AdaptiveSizePolicy
tamao
parents:
8016
diff
changeset
|
167 max_gc_pause_sec, |
0 | 168 GCTimeRatio); |
169 } | |
170 | |
171 void GenCollectorPolicy::initialize_flags() { | |
172 // All sizes must be multiples of the generation granularity. | |
12830
9b4d0569f2f4
8025852: Remove unnecessary setters in collector policy classes
jwilhelm
parents:
12350
diff
changeset
|
173 _min_alignment = (uintx) Generation::GenGrain; |
9b4d0569f2f4
8025852: Remove unnecessary setters in collector policy classes
jwilhelm
parents:
12350
diff
changeset
|
174 _max_alignment = compute_max_alignment(); |
0 | 175 |
176 CollectorPolicy::initialize_flags(); | |
177 | |
178 // All generational heaps have a youngest gen; handle those flags here. | |
179 | |
180 // Adjust max size parameters | |
181 if (NewSize > MaxNewSize) { | |
182 MaxNewSize = NewSize; | |
183 } | |
12830
9b4d0569f2f4
8025852: Remove unnecessary setters in collector policy classes
jwilhelm
parents:
12350
diff
changeset
|
184 NewSize = align_size_down(NewSize, _min_alignment); |
9b4d0569f2f4
8025852: Remove unnecessary setters in collector policy classes
jwilhelm
parents:
12350
diff
changeset
|
185 MaxNewSize = align_size_down(MaxNewSize, _min_alignment); |
0 | 186 |
187 // Check validity of heap flags | |
12830
9b4d0569f2f4
8025852: Remove unnecessary setters in collector policy classes
jwilhelm
parents:
12350
diff
changeset
|
188 assert(NewSize % _min_alignment == 0, "eden space alignment"); |
9b4d0569f2f4
8025852: Remove unnecessary setters in collector policy classes
jwilhelm
parents:
12350
diff
changeset
|
189 assert(MaxNewSize % _min_alignment == 0, "survivor space alignment"); |
0 | 190 |
12830
9b4d0569f2f4
8025852: Remove unnecessary setters in collector policy classes
jwilhelm
parents:
12350
diff
changeset
|
191 if (NewSize < 3 * _min_alignment) { |
0 | 192 // make sure there room for eden and two survivor spaces |
193 vm_exit_during_initialization("Too small new size specified"); | |
194 } | |
13059
46d7652b223c
8026853: Prepare GC code for collector policy regression fix
jwilhelm
parents:
13058
diff
changeset
|
195 |
0 | 196 if (SurvivorRatio < 1 || NewRatio < 1) { |
12831 | 197 vm_exit_during_initialization("Invalid young gen ratio specified"); |
0 | 198 } |
199 } | |
200 | |
201 void TwoGenerationCollectorPolicy::initialize_flags() { | |
202 GenCollectorPolicy::initialize_flags(); | |
203 | |
12830
9b4d0569f2f4
8025852: Remove unnecessary setters in collector policy classes
jwilhelm
parents:
12350
diff
changeset
|
204 OldSize = align_size_down(OldSize, _min_alignment); |
8013
95ccff9eee8e
6348447: Specifying -XX:OldSize crashes 64-bit VMs
jwilhelm
parents:
7451
diff
changeset
|
205 |
95ccff9eee8e
6348447: Specifying -XX:OldSize crashes 64-bit VMs
jwilhelm
parents:
7451
diff
changeset
|
206 if (FLAG_IS_CMDLINE(OldSize) && FLAG_IS_DEFAULT(NewSize)) { |
95ccff9eee8e
6348447: Specifying -XX:OldSize crashes 64-bit VMs
jwilhelm
parents:
7451
diff
changeset
|
207 // NewRatio will be used later to set the young generation size so we use |
95ccff9eee8e
6348447: Specifying -XX:OldSize crashes 64-bit VMs
jwilhelm
parents:
7451
diff
changeset
|
208 // it to calculate how big the heap should be based on the requested OldSize |
95ccff9eee8e
6348447: Specifying -XX:OldSize crashes 64-bit VMs
jwilhelm
parents:
7451
diff
changeset
|
209 // and NewRatio. |
95ccff9eee8e
6348447: Specifying -XX:OldSize crashes 64-bit VMs
jwilhelm
parents:
7451
diff
changeset
|
210 assert(NewRatio > 0, "NewRatio should have been set up earlier"); |
95ccff9eee8e
6348447: Specifying -XX:OldSize crashes 64-bit VMs
jwilhelm
parents:
7451
diff
changeset
|
211 size_t calculated_heapsize = (OldSize / NewRatio) * (NewRatio + 1); |
95ccff9eee8e
6348447: Specifying -XX:OldSize crashes 64-bit VMs
jwilhelm
parents:
7451
diff
changeset
|
212 |
12830
9b4d0569f2f4
8025852: Remove unnecessary setters in collector policy classes
jwilhelm
parents:
12350
diff
changeset
|
213 calculated_heapsize = align_size_up(calculated_heapsize, _max_alignment); |
8013
95ccff9eee8e
6348447: Specifying -XX:OldSize crashes 64-bit VMs
jwilhelm
parents:
7451
diff
changeset
|
214 MaxHeapSize = calculated_heapsize; |
95ccff9eee8e
6348447: Specifying -XX:OldSize crashes 64-bit VMs
jwilhelm
parents:
7451
diff
changeset
|
215 InitialHeapSize = calculated_heapsize; |
95ccff9eee8e
6348447: Specifying -XX:OldSize crashes 64-bit VMs
jwilhelm
parents:
7451
diff
changeset
|
216 } |
12830
9b4d0569f2f4
8025852: Remove unnecessary setters in collector policy classes
jwilhelm
parents:
12350
diff
changeset
|
217 MaxHeapSize = align_size_up(MaxHeapSize, _max_alignment); |
0 | 218 |
10241
d17700c82d7d
8006088: Incompatible heap size flags accepted by VM
tschatzl
parents:
10239
diff
changeset
|
219 // adjust max heap size if necessary |
d17700c82d7d
8006088: Incompatible heap size flags accepted by VM
tschatzl
parents:
10239
diff
changeset
|
220 if (NewSize + OldSize > MaxHeapSize) { |
d17700c82d7d
8006088: Incompatible heap size flags accepted by VM
tschatzl
parents:
10239
diff
changeset
|
221 if (FLAG_IS_CMDLINE(MaxHeapSize)) { |
d17700c82d7d
8006088: Incompatible heap size flags accepted by VM
tschatzl
parents:
10239
diff
changeset
|
222 // somebody set a maximum heap size with the intention that we should not |
d17700c82d7d
8006088: Incompatible heap size flags accepted by VM
tschatzl
parents:
10239
diff
changeset
|
223 // exceed it. Adjust New/OldSize as necessary. |
d17700c82d7d
8006088: Incompatible heap size flags accepted by VM
tschatzl
parents:
10239
diff
changeset
|
224 uintx calculated_size = NewSize + OldSize; |
d17700c82d7d
8006088: Incompatible heap size flags accepted by VM
tschatzl
parents:
10239
diff
changeset
|
225 double shrink_factor = (double) MaxHeapSize / calculated_size; |
d17700c82d7d
8006088: Incompatible heap size flags accepted by VM
tschatzl
parents:
10239
diff
changeset
|
226 // align |
12830
9b4d0569f2f4
8025852: Remove unnecessary setters in collector policy classes
jwilhelm
parents:
12350
diff
changeset
|
227 NewSize = align_size_down((uintx) (NewSize * shrink_factor), _min_alignment); |
10241
d17700c82d7d
8006088: Incompatible heap size flags accepted by VM
tschatzl
parents:
10239
diff
changeset
|
228 // OldSize is already aligned because above we aligned MaxHeapSize to |
12830
9b4d0569f2f4
8025852: Remove unnecessary setters in collector policy classes
jwilhelm
parents:
12350
diff
changeset
|
229 // _max_alignment, and we just made sure that NewSize is aligned to |
9b4d0569f2f4
8025852: Remove unnecessary setters in collector policy classes
jwilhelm
parents:
12350
diff
changeset
|
230 // _min_alignment. In initialize_flags() we verified that _max_alignment |
9b4d0569f2f4
8025852: Remove unnecessary setters in collector policy classes
jwilhelm
parents:
12350
diff
changeset
|
231 // is a multiple of _min_alignment. |
10241
d17700c82d7d
8006088: Incompatible heap size flags accepted by VM
tschatzl
parents:
10239
diff
changeset
|
232 OldSize = MaxHeapSize - NewSize; |
d17700c82d7d
8006088: Incompatible heap size flags accepted by VM
tschatzl
parents:
10239
diff
changeset
|
233 } else { |
d17700c82d7d
8006088: Incompatible heap size flags accepted by VM
tschatzl
parents:
10239
diff
changeset
|
234 MaxHeapSize = NewSize + OldSize; |
d17700c82d7d
8006088: Incompatible heap size flags accepted by VM
tschatzl
parents:
10239
diff
changeset
|
235 } |
d17700c82d7d
8006088: Incompatible heap size flags accepted by VM
tschatzl
parents:
10239
diff
changeset
|
236 } |
d17700c82d7d
8006088: Incompatible heap size flags accepted by VM
tschatzl
parents:
10239
diff
changeset
|
237 // need to do this again |
12830
9b4d0569f2f4
8025852: Remove unnecessary setters in collector policy classes
jwilhelm
parents:
12350
diff
changeset
|
238 MaxHeapSize = align_size_up(MaxHeapSize, _max_alignment); |
10241
d17700c82d7d
8006088: Incompatible heap size flags accepted by VM
tschatzl
parents:
10239
diff
changeset
|
239 |
10284 | 240 // adjust max heap size if necessary |
241 if (NewSize + OldSize > MaxHeapSize) { | |
242 if (FLAG_IS_CMDLINE(MaxHeapSize)) { | |
243 // somebody set a maximum heap size with the intention that we should not | |
244 // exceed it. Adjust New/OldSize as necessary. | |
245 uintx calculated_size = NewSize + OldSize; | |
246 double shrink_factor = (double) MaxHeapSize / calculated_size; | |
247 // align | |
12830
9b4d0569f2f4
8025852: Remove unnecessary setters in collector policy classes
jwilhelm
parents:
12350
diff
changeset
|
248 NewSize = align_size_down((uintx) (NewSize * shrink_factor), _min_alignment); |
10284 | 249 // OldSize is already aligned because above we aligned MaxHeapSize to |
12830
9b4d0569f2f4
8025852: Remove unnecessary setters in collector policy classes
jwilhelm
parents:
12350
diff
changeset
|
250 // _max_alignment, and we just made sure that NewSize is aligned to |
9b4d0569f2f4
8025852: Remove unnecessary setters in collector policy classes
jwilhelm
parents:
12350
diff
changeset
|
251 // _min_alignment. In initialize_flags() we verified that _max_alignment |
9b4d0569f2f4
8025852: Remove unnecessary setters in collector policy classes
jwilhelm
parents:
12350
diff
changeset
|
252 // is a multiple of _min_alignment. |
10284 | 253 OldSize = MaxHeapSize - NewSize; |
254 } else { | |
255 MaxHeapSize = NewSize + OldSize; | |
256 } | |
257 } | |
258 // need to do this again | |
12830
9b4d0569f2f4
8025852: Remove unnecessary setters in collector policy classes
jwilhelm
parents:
12350
diff
changeset
|
259 MaxHeapSize = align_size_up(MaxHeapSize, _max_alignment); |
10284 | 260 |
0 | 261 always_do_update_barrier = UseConcMarkSweepGC; |
262 | |
263 // Check validity of heap flags | |
12830
9b4d0569f2f4
8025852: Remove unnecessary setters in collector policy classes
jwilhelm
parents:
12350
diff
changeset
|
264 assert(OldSize % _min_alignment == 0, "old space alignment"); |
9b4d0569f2f4
8025852: Remove unnecessary setters in collector policy classes
jwilhelm
parents:
12350
diff
changeset
|
265 assert(MaxHeapSize % _max_alignment == 0, "maximum heap alignment"); |
0 | 266 } |
267 | |
13
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
268 // Values set on the command line win over any ergonomically |
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
269 // set command line parameters. |
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
270 // Ergonomic choice of parameters are done before this |
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
271 // method is called. Values for command line parameters such as NewSize |
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
272 // and MaxNewSize feed those ergonomic choices into this method. |
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
273 // This method makes the final generation sizings consistent with |
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
274 // themselves and with overall heap sizings. |
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
275 // In the absence of explicitly set command line flags, policies |
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
276 // such as the use of NewRatio are used to size the generation. |
0 | 277 void GenCollectorPolicy::initialize_size_info() { |
278 CollectorPolicy::initialize_size_info(); | |
279 | |
12830
9b4d0569f2f4
8025852: Remove unnecessary setters in collector policy classes
jwilhelm
parents:
12350
diff
changeset
|
280 // _min_alignment is used for alignment within a generation. |
13
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
281 // There is additional alignment done down stream for some |
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
282 // collectors that sometimes causes unwanted rounding up of |
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
283 // generations sizes. |
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
284 |
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
285 // Determine maximum size of gen0 |
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
286 |
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
287 size_t max_new_size = 0; |
2368
dde920245681
6896099: Integrate CMS heap ergo with default heap sizing ergo
ysr
parents:
1994
diff
changeset
|
288 if (FLAG_IS_CMDLINE(MaxNewSize) || FLAG_IS_ERGO(MaxNewSize)) { |
12830
9b4d0569f2f4
8025852: Remove unnecessary setters in collector policy classes
jwilhelm
parents:
12350
diff
changeset
|
289 if (MaxNewSize < _min_alignment) { |
9b4d0569f2f4
8025852: Remove unnecessary setters in collector policy classes
jwilhelm
parents:
12350
diff
changeset
|
290 max_new_size = _min_alignment; |
2368
dde920245681
6896099: Integrate CMS heap ergo with default heap sizing ergo
ysr
parents:
1994
diff
changeset
|
291 } |
12830
9b4d0569f2f4
8025852: Remove unnecessary setters in collector policy classes
jwilhelm
parents:
12350
diff
changeset
|
292 if (MaxNewSize >= _max_heap_byte_size) { |
9b4d0569f2f4
8025852: Remove unnecessary setters in collector policy classes
jwilhelm
parents:
12350
diff
changeset
|
293 max_new_size = align_size_down(_max_heap_byte_size - _min_alignment, |
9b4d0569f2f4
8025852: Remove unnecessary setters in collector policy classes
jwilhelm
parents:
12350
diff
changeset
|
294 _min_alignment); |
13
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
295 warning("MaxNewSize (" SIZE_FORMAT "k) is equal to or " |
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
296 "greater than the entire heap (" SIZE_FORMAT "k). A " |
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
297 "new generation size of " SIZE_FORMAT "k will be used.", |
12830
9b4d0569f2f4
8025852: Remove unnecessary setters in collector policy classes
jwilhelm
parents:
12350
diff
changeset
|
298 MaxNewSize/K, _max_heap_byte_size/K, max_new_size/K); |
13
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
299 } else { |
12830
9b4d0569f2f4
8025852: Remove unnecessary setters in collector policy classes
jwilhelm
parents:
12350
diff
changeset
|
300 max_new_size = align_size_down(MaxNewSize, _min_alignment); |
13
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
301 } |
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
302 |
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
303 // The case for FLAG_IS_ERGO(MaxNewSize) could be treated |
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
304 // specially at this point to just use an ergonomically set |
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
305 // MaxNewSize to set max_new_size. For cases with small |
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
306 // heaps such a policy often did not work because the MaxNewSize |
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
307 // was larger than the entire heap. The interpretation given |
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
308 // to ergonomically set flags is that the flags are set |
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
309 // by different collectors for their own special needs but |
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
310 // are not allowed to badly shape the heap. This allows the |
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
311 // different collectors to decide what's best for themselves |
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
312 // without having to factor in the overall heap shape. It |
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
313 // can be the case in the future that the collectors would |
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
314 // only make "wise" ergonomics choices and this policy could |
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
315 // just accept those choices. The choices currently made are |
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
316 // not always "wise". |
0 | 317 } else { |
12830
9b4d0569f2f4
8025852: Remove unnecessary setters in collector policy classes
jwilhelm
parents:
12350
diff
changeset
|
318 max_new_size = scale_by_NewRatio_aligned(_max_heap_byte_size); |
13
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
319 // Bound the maximum size by NewSize below (since it historically |
0 | 320 // would have been NewSize and because the NewRatio calculation could |
321 // yield a size that is too small) and bound it by MaxNewSize above. | |
13
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
322 // Ergonomics plays here by previously calculating the desired |
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
323 // NewSize and MaxNewSize. |
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
324 max_new_size = MIN2(MAX2(max_new_size, NewSize), MaxNewSize); |
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
325 } |
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
326 assert(max_new_size > 0, "All paths should set max_new_size"); |
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
327 |
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
328 // Given the maximum gen0 size, determine the initial and |
2368
dde920245681
6896099: Integrate CMS heap ergo with default heap sizing ergo
ysr
parents:
1994
diff
changeset
|
329 // minimum gen0 sizes. |
13
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
330 |
12830
9b4d0569f2f4
8025852: Remove unnecessary setters in collector policy classes
jwilhelm
parents:
12350
diff
changeset
|
331 if (_max_heap_byte_size == _min_heap_byte_size) { |
13
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
332 // The maximum and minimum heap sizes are the same so |
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
333 // the generations minimum and initial must be the |
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
334 // same as its maximum. |
12830
9b4d0569f2f4
8025852: Remove unnecessary setters in collector policy classes
jwilhelm
parents:
12350
diff
changeset
|
335 _min_gen0_size = max_new_size; |
9b4d0569f2f4
8025852: Remove unnecessary setters in collector policy classes
jwilhelm
parents:
12350
diff
changeset
|
336 _initial_gen0_size = max_new_size; |
9b4d0569f2f4
8025852: Remove unnecessary setters in collector policy classes
jwilhelm
parents:
12350
diff
changeset
|
337 _max_gen0_size = max_new_size; |
13
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
338 } else { |
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
339 size_t desired_new_size = 0; |
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
340 if (!FLAG_IS_DEFAULT(NewSize)) { |
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
341 // If NewSize is set ergonomically (for example by cms), it |
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
342 // would make sense to use it. If it is used, also use it |
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
343 // to set the initial size. Although there is no reason |
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
344 // the minimum size and the initial size have to be the same, |
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
345 // the current implementation gets into trouble during the calculation |
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
346 // of the tenured generation sizes if they are different. |
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
347 // Note that this makes the initial size and the minimum size |
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
348 // generally small compared to the NewRatio calculation. |
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
349 _min_gen0_size = NewSize; |
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
350 desired_new_size = NewSize; |
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
351 max_new_size = MAX2(max_new_size, NewSize); |
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
352 } else { |
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
353 // For the case where NewSize is the default, use NewRatio |
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
354 // to size the minimum and initial generation sizes. |
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
355 // Use the default NewSize as the floor for these values. If |
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
356 // NewRatio is overly large, the resulting sizes can be too |
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
357 // small. |
12830
9b4d0569f2f4
8025852: Remove unnecessary setters in collector policy classes
jwilhelm
parents:
12350
diff
changeset
|
358 _min_gen0_size = MAX2(scale_by_NewRatio_aligned(_min_heap_byte_size), NewSize); |
13
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
359 desired_new_size = |
12830
9b4d0569f2f4
8025852: Remove unnecessary setters in collector policy classes
jwilhelm
parents:
12350
diff
changeset
|
360 MAX2(scale_by_NewRatio_aligned(_initial_heap_byte_size), NewSize); |
13
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
361 } |
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
362 |
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
363 assert(_min_gen0_size > 0, "Sanity check"); |
12830
9b4d0569f2f4
8025852: Remove unnecessary setters in collector policy classes
jwilhelm
parents:
12350
diff
changeset
|
364 _initial_gen0_size = desired_new_size; |
9b4d0569f2f4
8025852: Remove unnecessary setters in collector policy classes
jwilhelm
parents:
12350
diff
changeset
|
365 _max_gen0_size = max_new_size; |
13
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
366 |
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
367 // At this point the desirable initial and minimum sizes have been |
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
368 // determined without regard to the maximum sizes. |
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
369 |
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
370 // Bound the sizes by the corresponding overall heap sizes. |
12830
9b4d0569f2f4
8025852: Remove unnecessary setters in collector policy classes
jwilhelm
parents:
12350
diff
changeset
|
371 _min_gen0_size = bound_minus_alignment(_min_gen0_size, _min_heap_byte_size); |
9b4d0569f2f4
8025852: Remove unnecessary setters in collector policy classes
jwilhelm
parents:
12350
diff
changeset
|
372 _initial_gen0_size = bound_minus_alignment(_initial_gen0_size, _initial_heap_byte_size); |
9b4d0569f2f4
8025852: Remove unnecessary setters in collector policy classes
jwilhelm
parents:
12350
diff
changeset
|
373 _max_gen0_size = bound_minus_alignment(_max_gen0_size, _max_heap_byte_size); |
13
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
374 |
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
375 // At this point all three sizes have been checked against the |
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
376 // maximum sizes but have not been checked for consistency |
342
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
13
diff
changeset
|
377 // among the three. |
13
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
378 |
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
379 // Final check min <= initial <= max |
12830
9b4d0569f2f4
8025852: Remove unnecessary setters in collector policy classes
jwilhelm
parents:
12350
diff
changeset
|
380 _min_gen0_size = MIN2(_min_gen0_size, _max_gen0_size); |
9b4d0569f2f4
8025852: Remove unnecessary setters in collector policy classes
jwilhelm
parents:
12350
diff
changeset
|
381 _initial_gen0_size = MAX2(MIN2(_initial_gen0_size, _max_gen0_size), _min_gen0_size); |
9b4d0569f2f4
8025852: Remove unnecessary setters in collector policy classes
jwilhelm
parents:
12350
diff
changeset
|
382 _min_gen0_size = MIN2(_min_gen0_size, _initial_gen0_size); |
0 | 383 } |
384 | |
13
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
385 if (PrintGCDetails && Verbose) { |
2368
dde920245681
6896099: Integrate CMS heap ergo with default heap sizing ergo
ysr
parents:
1994
diff
changeset
|
386 gclog_or_tty->print_cr("1: Minimum gen0 " SIZE_FORMAT " Initial gen0 " |
13
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
387 SIZE_FORMAT " Maximum gen0 " SIZE_FORMAT, |
12830
9b4d0569f2f4
8025852: Remove unnecessary setters in collector policy classes
jwilhelm
parents:
12350
diff
changeset
|
388 _min_gen0_size, _initial_gen0_size, _max_gen0_size); |
13
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
389 } |
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
390 } |
0 | 391 |
13
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
392 // Call this method during the sizing of the gen1 to make |
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
393 // adjustments to gen0 because of gen1 sizing policy. gen0 initially has |
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
394 // the most freedom in sizing because it is done before the |
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
395 // policy for gen1 is applied. Once gen1 policies have been applied, |
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
396 // there may be conflicts in the shape of the heap and this method |
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
397 // is used to make the needed adjustments. The application of the |
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
398 // policies could be more sophisticated (iterative for example) but |
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
399 // keeping it simple also seems a worthwhile goal. |
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
400 bool TwoGenerationCollectorPolicy::adjust_gen0_sizes(size_t* gen0_size_ptr, |
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
401 size_t* gen1_size_ptr, |
8013
95ccff9eee8e
6348447: Specifying -XX:OldSize crashes 64-bit VMs
jwilhelm
parents:
7451
diff
changeset
|
402 const size_t heap_size, |
95ccff9eee8e
6348447: Specifying -XX:OldSize crashes 64-bit VMs
jwilhelm
parents:
7451
diff
changeset
|
403 const size_t min_gen1_size) { |
13
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
404 bool result = false; |
8013
95ccff9eee8e
6348447: Specifying -XX:OldSize crashes 64-bit VMs
jwilhelm
parents:
7451
diff
changeset
|
405 |
13
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
406 if ((*gen1_size_ptr + *gen0_size_ptr) > heap_size) { |
8013
95ccff9eee8e
6348447: Specifying -XX:OldSize crashes 64-bit VMs
jwilhelm
parents:
7451
diff
changeset
|
407 if ((heap_size < (*gen0_size_ptr + min_gen1_size)) && |
12830
9b4d0569f2f4
8025852: Remove unnecessary setters in collector policy classes
jwilhelm
parents:
12350
diff
changeset
|
408 (heap_size >= min_gen1_size + _min_alignment)) { |
8013
95ccff9eee8e
6348447: Specifying -XX:OldSize crashes 64-bit VMs
jwilhelm
parents:
7451
diff
changeset
|
409 // Adjust gen0 down to accommodate min_gen1_size |
13058
3aee6bc29547
8026852: Use restricted_align_down in collector policy code
jwilhelm
parents:
13057
diff
changeset
|
410 *gen0_size_ptr = align_size_down_bounded(heap_size - min_gen1_size, _min_alignment); |
13
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
411 assert(*gen0_size_ptr > 0, "Min gen0 is too large"); |
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
412 result = true; |
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
413 } else { |
13058
3aee6bc29547
8026852: Use restricted_align_down in collector policy code
jwilhelm
parents:
13057
diff
changeset
|
414 *gen1_size_ptr = align_size_down_bounded(heap_size - *gen0_size_ptr, _min_alignment); |
13
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
415 } |
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
416 } |
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
417 return result; |
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
418 } |
0 | 419 |
13
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
420 // Minimum sizes of the generations may be different than |
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
421 // the initial sizes. An inconsistently is permitted here |
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
422 // in the total size that can be specified explicitly by |
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
423 // command line specification of OldSize and NewSize and |
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
424 // also a command line specification of -Xms. Issue a warning |
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
425 // but allow the values to pass. |
0 | 426 |
427 void TwoGenerationCollectorPolicy::initialize_size_info() { | |
428 GenCollectorPolicy::initialize_size_info(); | |
429 | |
13
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
430 // At this point the minimum, initial and maximum sizes |
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
431 // of the overall heap and of gen0 have been determined. |
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
432 // The maximum gen1 size can be determined from the maximum gen0 |
2368
dde920245681
6896099: Integrate CMS heap ergo with default heap sizing ergo
ysr
parents:
1994
diff
changeset
|
433 // and maximum heap size since no explicit flags exits |
13
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
434 // for setting the gen1 maximum. |
12830
9b4d0569f2f4
8025852: Remove unnecessary setters in collector policy classes
jwilhelm
parents:
12350
diff
changeset
|
435 _max_gen1_size = _max_heap_byte_size - _max_gen0_size; |
13
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
436 _max_gen1_size = |
12830
9b4d0569f2f4
8025852: Remove unnecessary setters in collector policy classes
jwilhelm
parents:
12350
diff
changeset
|
437 MAX2((uintx)align_size_down(_max_gen1_size, _min_alignment), _min_alignment); |
13
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
438 // If no explicit command line flag has been set for the |
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
439 // gen1 size, use what is left for gen1. |
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
440 if (FLAG_IS_DEFAULT(OldSize) || FLAG_IS_ERGO(OldSize)) { |
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
441 // The user has not specified any value or ergonomics |
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
442 // has chosen a value (which may or may not be consistent |
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
443 // with the overall heap size). In either case make |
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
444 // the minimum, maximum and initial sizes consistent |
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
445 // with the gen0 sizes and the overall heap sizes. |
12830
9b4d0569f2f4
8025852: Remove unnecessary setters in collector policy classes
jwilhelm
parents:
12350
diff
changeset
|
446 assert(_min_heap_byte_size > _min_gen0_size, |
13
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
447 "gen0 has an unexpected minimum size"); |
12830
9b4d0569f2f4
8025852: Remove unnecessary setters in collector policy classes
jwilhelm
parents:
12350
diff
changeset
|
448 _min_gen1_size = _min_heap_byte_size - _min_gen0_size; |
9b4d0569f2f4
8025852: Remove unnecessary setters in collector policy classes
jwilhelm
parents:
12350
diff
changeset
|
449 _min_gen1_size = |
9b4d0569f2f4
8025852: Remove unnecessary setters in collector policy classes
jwilhelm
parents:
12350
diff
changeset
|
450 MAX2((uintx)align_size_down(_min_gen1_size, _min_alignment), _min_alignment); |
9b4d0569f2f4
8025852: Remove unnecessary setters in collector policy classes
jwilhelm
parents:
12350
diff
changeset
|
451 _initial_gen1_size = _initial_heap_byte_size - _initial_gen0_size; |
9b4d0569f2f4
8025852: Remove unnecessary setters in collector policy classes
jwilhelm
parents:
12350
diff
changeset
|
452 _initial_gen1_size = |
9b4d0569f2f4
8025852: Remove unnecessary setters in collector policy classes
jwilhelm
parents:
12350
diff
changeset
|
453 MAX2((uintx)align_size_down(_initial_gen1_size, _min_alignment), _min_alignment); |
13
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
454 } else { |
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
455 // It's been explicitly set on the command line. Use the |
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
456 // OldSize and then determine the consequences. |
12830
9b4d0569f2f4
8025852: Remove unnecessary setters in collector policy classes
jwilhelm
parents:
12350
diff
changeset
|
457 _min_gen1_size = OldSize; |
9b4d0569f2f4
8025852: Remove unnecessary setters in collector policy classes
jwilhelm
parents:
12350
diff
changeset
|
458 _initial_gen1_size = OldSize; |
13
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
459 |
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
460 // If the user has explicitly set an OldSize that is inconsistent |
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
461 // with other command line flags, issue a warning. |
0 | 462 // The generation minimums and the overall heap mimimum should |
463 // be within one heap alignment. | |
12830
9b4d0569f2f4
8025852: Remove unnecessary setters in collector policy classes
jwilhelm
parents:
12350
diff
changeset
|
464 if ((_min_gen1_size + _min_gen0_size + _min_alignment) < _min_heap_byte_size) { |
0 | 465 warning("Inconsistency between minimum heap size and minimum " |
12830
9b4d0569f2f4
8025852: Remove unnecessary setters in collector policy classes
jwilhelm
parents:
12350
diff
changeset
|
466 "generation sizes: using minimum heap = " SIZE_FORMAT, |
9b4d0569f2f4
8025852: Remove unnecessary setters in collector policy classes
jwilhelm
parents:
12350
diff
changeset
|
467 _min_heap_byte_size); |
13
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
468 } |
13059
46d7652b223c
8026853: Prepare GC code for collector policy regression fix
jwilhelm
parents:
13058
diff
changeset
|
469 if (OldSize > _max_gen1_size) { |
13
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
470 warning("Inconsistency between maximum heap size and maximum " |
12830
9b4d0569f2f4
8025852: Remove unnecessary setters in collector policy classes
jwilhelm
parents:
12350
diff
changeset
|
471 "generation sizes: using maximum heap = " SIZE_FORMAT |
9b4d0569f2f4
8025852: Remove unnecessary setters in collector policy classes
jwilhelm
parents:
12350
diff
changeset
|
472 " -XX:OldSize flag is being ignored", |
9b4d0569f2f4
8025852: Remove unnecessary setters in collector policy classes
jwilhelm
parents:
12350
diff
changeset
|
473 _max_heap_byte_size); |
2368
dde920245681
6896099: Integrate CMS heap ergo with default heap sizing ergo
ysr
parents:
1994
diff
changeset
|
474 } |
13
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
475 // If there is an inconsistency between the OldSize and the minimum and/or |
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
476 // initial size of gen0, since OldSize was explicitly set, OldSize wins. |
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
477 if (adjust_gen0_sizes(&_min_gen0_size, &_min_gen1_size, |
12830
9b4d0569f2f4
8025852: Remove unnecessary setters in collector policy classes
jwilhelm
parents:
12350
diff
changeset
|
478 _min_heap_byte_size, OldSize)) { |
13
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
479 if (PrintGCDetails && Verbose) { |
2368
dde920245681
6896099: Integrate CMS heap ergo with default heap sizing ergo
ysr
parents:
1994
diff
changeset
|
480 gclog_or_tty->print_cr("2: Minimum gen0 " SIZE_FORMAT " Initial gen0 " |
13
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
481 SIZE_FORMAT " Maximum gen0 " SIZE_FORMAT, |
12830
9b4d0569f2f4
8025852: Remove unnecessary setters in collector policy classes
jwilhelm
parents:
12350
diff
changeset
|
482 _min_gen0_size, _initial_gen0_size, _max_gen0_size); |
13
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
483 } |
0 | 484 } |
13
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
485 // Initial size |
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
486 if (adjust_gen0_sizes(&_initial_gen0_size, &_initial_gen1_size, |
12830
9b4d0569f2f4
8025852: Remove unnecessary setters in collector policy classes
jwilhelm
parents:
12350
diff
changeset
|
487 _initial_heap_byte_size, OldSize)) { |
13
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
488 if (PrintGCDetails && Verbose) { |
2368
dde920245681
6896099: Integrate CMS heap ergo with default heap sizing ergo
ysr
parents:
1994
diff
changeset
|
489 gclog_or_tty->print_cr("3: Minimum gen0 " SIZE_FORMAT " Initial gen0 " |
13
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
490 SIZE_FORMAT " Maximum gen0 " SIZE_FORMAT, |
12830
9b4d0569f2f4
8025852: Remove unnecessary setters in collector policy classes
jwilhelm
parents:
12350
diff
changeset
|
491 _min_gen0_size, _initial_gen0_size, _max_gen0_size); |
13
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
492 } |
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
493 } |
0 | 494 } |
13
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
495 // Enforce the maximum gen1 size. |
12830
9b4d0569f2f4
8025852: Remove unnecessary setters in collector policy classes
jwilhelm
parents:
12350
diff
changeset
|
496 _min_gen1_size = MIN2(_min_gen1_size, _max_gen1_size); |
0 | 497 |
13
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
498 // Check that min gen1 <= initial gen1 <= max gen1 |
12830
9b4d0569f2f4
8025852: Remove unnecessary setters in collector policy classes
jwilhelm
parents:
12350
diff
changeset
|
499 _initial_gen1_size = MAX2(_initial_gen1_size, _min_gen1_size); |
9b4d0569f2f4
8025852: Remove unnecessary setters in collector policy classes
jwilhelm
parents:
12350
diff
changeset
|
500 _initial_gen1_size = MIN2(_initial_gen1_size, _max_gen1_size); |
13
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
501 |
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
502 if (PrintGCDetails && Verbose) { |
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
503 gclog_or_tty->print_cr("Minimum gen1 " SIZE_FORMAT " Initial gen1 " |
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
504 SIZE_FORMAT " Maximum gen1 " SIZE_FORMAT, |
12830
9b4d0569f2f4
8025852: Remove unnecessary setters in collector policy classes
jwilhelm
parents:
12350
diff
changeset
|
505 _min_gen1_size, _initial_gen1_size, _max_gen1_size); |
13
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
506 } |
0 | 507 } |
508 | |
509 HeapWord* GenCollectorPolicy::mem_allocate_work(size_t size, | |
510 bool is_tlab, | |
511 bool* gc_overhead_limit_was_exceeded) { | |
512 GenCollectedHeap *gch = GenCollectedHeap::heap(); | |
513 | |
514 debug_only(gch->check_for_valid_allocation_state()); | |
515 assert(gch->no_gc_in_progress(), "Allocation during gc not allowed"); | |
1387
0bfd3fb24150
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
jmasa
parents:
1064
diff
changeset
|
516 |
0bfd3fb24150
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
jmasa
parents:
1064
diff
changeset
|
517 // In general gc_overhead_limit_was_exceeded should be false so |
0bfd3fb24150
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
jmasa
parents:
1064
diff
changeset
|
518 // set it so here and reset it to true only if the gc time |
0bfd3fb24150
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
jmasa
parents:
1064
diff
changeset
|
519 // limit is being exceeded as checked below. |
0bfd3fb24150
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
jmasa
parents:
1064
diff
changeset
|
520 *gc_overhead_limit_was_exceeded = false; |
0bfd3fb24150
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
jmasa
parents:
1064
diff
changeset
|
521 |
0 | 522 HeapWord* result = NULL; |
523 | |
524 // Loop until the allocation is satisified, | |
525 // or unsatisfied after GC. | |
8853
2e093b564241
7014552: gc/lock/jni/jnilockXXX works too slow on 1-processor machine
mgerdin
parents:
8743
diff
changeset
|
526 for (int try_count = 1, gclocker_stalled_count = 0; /* return or throw */; try_count += 1) { |
0 | 527 HandleMark hm; // discard any handles allocated in each iteration |
528 | |
529 // First allocation attempt is lock-free. | |
530 Generation *gen0 = gch->get_gen(0); | |
531 assert(gen0->supports_inline_contig_alloc(), | |
532 "Otherwise, must do alloc within heap lock"); | |
533 if (gen0->should_allocate(size, is_tlab)) { | |
534 result = gen0->par_allocate(size, is_tlab); | |
535 if (result != NULL) { | |
536 assert(gch->is_in_reserved(result), "result not in heap"); | |
537 return result; | |
538 } | |
539 } | |
540 unsigned int gc_count_before; // read inside the Heap_lock locked region | |
541 { | |
542 MutexLocker ml(Heap_lock); | |
543 if (PrintGC && Verbose) { | |
544 gclog_or_tty->print_cr("TwoGenerationCollectorPolicy::mem_allocate_work:" | |
545 " attempting locked slow path allocation"); | |
546 } | |
547 // Note that only large objects get a shot at being | |
548 // allocated in later generations. | |
549 bool first_only = ! should_try_older_generation_allocation(size); | |
550 | |
551 result = gch->attempt_allocation(size, is_tlab, first_only); | |
552 if (result != NULL) { | |
553 assert(gch->is_in_reserved(result), "result not in heap"); | |
554 return result; | |
555 } | |
556 | |
557 if (GC_locker::is_active_and_needs_gc()) { | |
558 if (is_tlab) { | |
559 return NULL; // Caller will retry allocating individual object | |
560 } | |
561 if (!gch->is_maximal_no_gc()) { | |
562 // Try and expand heap to satisfy request | |
563 result = expand_heap_and_allocate(size, is_tlab); | |
564 // result could be null if we are out of space | |
565 if (result != NULL) { | |
566 return result; | |
567 } | |
568 } | |
569 | |
8853
2e093b564241
7014552: gc/lock/jni/jnilockXXX works too slow on 1-processor machine
mgerdin
parents:
8743
diff
changeset
|
570 if (gclocker_stalled_count > GCLockerRetryAllocationCount) { |
2e093b564241
7014552: gc/lock/jni/jnilockXXX works too slow on 1-processor machine
mgerdin
parents:
8743
diff
changeset
|
571 return NULL; // we didn't get to do a GC and we didn't get any memory |
2e093b564241
7014552: gc/lock/jni/jnilockXXX works too slow on 1-processor machine
mgerdin
parents:
8743
diff
changeset
|
572 } |
2e093b564241
7014552: gc/lock/jni/jnilockXXX works too slow on 1-processor machine
mgerdin
parents:
8743
diff
changeset
|
573 |
0 | 574 // If this thread is not in a jni critical section, we stall |
575 // the requestor until the critical section has cleared and | |
576 // GC allowed. When the critical section clears, a GC is | |
577 // initiated by the last thread exiting the critical section; so | |
578 // we retry the allocation sequence from the beginning of the loop, | |
579 // rather than causing more, now probably unnecessary, GC attempts. | |
580 JavaThread* jthr = JavaThread::current(); | |
581 if (!jthr->in_critical()) { | |
582 MutexUnlocker mul(Heap_lock); | |
583 // Wait for JNI critical section to be exited | |
584 GC_locker::stall_until_clear(); | |
8853
2e093b564241
7014552: gc/lock/jni/jnilockXXX works too slow on 1-processor machine
mgerdin
parents:
8743
diff
changeset
|
585 gclocker_stalled_count += 1; |
0 | 586 continue; |
587 } else { | |
588 if (CheckJNICalls) { | |
589 fatal("Possible deadlock due to allocating while" | |
590 " in jni critical section"); | |
591 } | |
592 return NULL; | |
593 } | |
594 } | |
595 | |
596 // Read the gc count while the heap lock is held. | |
597 gc_count_before = Universe::heap()->total_collections(); | |
598 } | |
599 | |
13059
46d7652b223c
8026853: Prepare GC code for collector policy regression fix
jwilhelm
parents:
13058
diff
changeset
|
600 VM_GenCollectForAllocation op(size, is_tlab, gc_count_before); |
0 | 601 VMThread::execute(&op); |
602 if (op.prologue_succeeded()) { | |
603 result = op.result(); | |
604 if (op.gc_locked()) { | |
605 assert(result == NULL, "must be NULL if gc_locked() is true"); | |
606 continue; // retry and/or stall as necessary | |
607 } | |
1387
0bfd3fb24150
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
jmasa
parents:
1064
diff
changeset
|
608 |
0bfd3fb24150
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
jmasa
parents:
1064
diff
changeset
|
609 // Allocation has failed and a collection |
0bfd3fb24150
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
jmasa
parents:
1064
diff
changeset
|
610 // has been done. If the gc time limit was exceeded the |
0bfd3fb24150
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
jmasa
parents:
1064
diff
changeset
|
611 // this time, return NULL so that an out-of-memory |
0bfd3fb24150
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
jmasa
parents:
1064
diff
changeset
|
612 // will be thrown. Clear gc_overhead_limit_exceeded |
0bfd3fb24150
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
jmasa
parents:
1064
diff
changeset
|
613 // so that the overhead exceeded does not persist. |
0bfd3fb24150
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
jmasa
parents:
1064
diff
changeset
|
614 |
0bfd3fb24150
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
jmasa
parents:
1064
diff
changeset
|
615 const bool limit_exceeded = size_policy()->gc_overhead_limit_exceeded(); |
0bfd3fb24150
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
jmasa
parents:
1064
diff
changeset
|
616 const bool softrefs_clear = all_soft_refs_clear(); |
8743
82657b6a8cc0
6976528: PS: assert(!limit_exceeded || softrefs_clear) failed: Should have been cleared
jmasa
parents:
8072
diff
changeset
|
617 |
1387
0bfd3fb24150
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
jmasa
parents:
1064
diff
changeset
|
618 if (limit_exceeded && softrefs_clear) { |
0bfd3fb24150
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
jmasa
parents:
1064
diff
changeset
|
619 *gc_overhead_limit_was_exceeded = true; |
0bfd3fb24150
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
jmasa
parents:
1064
diff
changeset
|
620 size_policy()->set_gc_overhead_limit_exceeded(false); |
0bfd3fb24150
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
jmasa
parents:
1064
diff
changeset
|
621 if (op.result() != NULL) { |
0bfd3fb24150
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
jmasa
parents:
1064
diff
changeset
|
622 CollectedHeap::fill_with_object(op.result(), size); |
0bfd3fb24150
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
jmasa
parents:
1064
diff
changeset
|
623 } |
0bfd3fb24150
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
jmasa
parents:
1064
diff
changeset
|
624 return NULL; |
0bfd3fb24150
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
jmasa
parents:
1064
diff
changeset
|
625 } |
0 | 626 assert(result == NULL || gch->is_in_reserved(result), |
627 "result not in heap"); | |
628 return result; | |
629 } | |
630 | |
631 // Give a warning if we seem to be looping forever. | |
632 if ((QueuedAllocationWarningCount > 0) && | |
633 (try_count % QueuedAllocationWarningCount == 0)) { | |
634 warning("TwoGenerationCollectorPolicy::mem_allocate_work retries %d times \n\t" | |
635 " size=%d %s", try_count, size, is_tlab ? "(TLAB)" : ""); | |
636 } | |
637 } | |
638 } | |
639 | |
640 HeapWord* GenCollectorPolicy::expand_heap_and_allocate(size_t size, | |
641 bool is_tlab) { | |
642 GenCollectedHeap *gch = GenCollectedHeap::heap(); | |
643 HeapWord* result = NULL; | |
644 for (int i = number_of_generations() - 1; i >= 0 && result == NULL; i--) { | |
645 Generation *gen = gch->get_gen(i); | |
646 if (gen->should_allocate(size, is_tlab)) { | |
647 result = gen->expand_and_allocate(size, is_tlab); | |
648 } | |
649 } | |
650 assert(result == NULL || gch->is_in_reserved(result), "result not in heap"); | |
651 return result; | |
652 } | |
653 | |
654 HeapWord* GenCollectorPolicy::satisfy_failed_allocation(size_t size, | |
655 bool is_tlab) { | |
656 GenCollectedHeap *gch = GenCollectedHeap::heap(); | |
657 GCCauseSetter x(gch, GCCause::_allocation_failure); | |
658 HeapWord* result = NULL; | |
659 | |
660 assert(size != 0, "Precondition violated"); | |
661 if (GC_locker::is_active_and_needs_gc()) { | |
662 // GC locker is active; instead of a collection we will attempt | |
663 // to expand the heap, if there's room for expansion. | |
664 if (!gch->is_maximal_no_gc()) { | |
665 result = expand_heap_and_allocate(size, is_tlab); | |
666 } | |
667 return result; // could be null if we are out of space | |
1994
6cd6d394f280
7001033: assert(gch->gc_cause() == GCCause::_scavenge_alot || !gch->incremental_collection_failed())
ysr
parents:
1972
diff
changeset
|
668 } else if (!gch->incremental_collection_will_fail(false /* don't consult_young */)) { |
0 | 669 // Do an incremental collection. |
670 gch->do_collection(false /* full */, | |
671 false /* clear_all_soft_refs */, | |
672 size /* size */, | |
673 is_tlab /* is_tlab */, | |
674 number_of_generations() - 1 /* max_level */); | |
675 } else { | |
1994
6cd6d394f280
7001033: assert(gch->gc_cause() == GCCause::_scavenge_alot || !gch->incremental_collection_failed())
ysr
parents:
1972
diff
changeset
|
676 if (Verbose && PrintGCDetails) { |
6cd6d394f280
7001033: assert(gch->gc_cause() == GCCause::_scavenge_alot || !gch->incremental_collection_failed())
ysr
parents:
1972
diff
changeset
|
677 gclog_or_tty->print(" :: Trying full because partial may fail :: "); |
6cd6d394f280
7001033: assert(gch->gc_cause() == GCCause::_scavenge_alot || !gch->incremental_collection_failed())
ysr
parents:
1972
diff
changeset
|
678 } |
0 | 679 // Try a full collection; see delta for bug id 6266275 |
680 // for the original code and why this has been simplified | |
681 // with from-space allocation criteria modified and | |
682 // such allocation moved out of the safepoint path. | |
683 gch->do_collection(true /* full */, | |
684 false /* clear_all_soft_refs */, | |
685 size /* size */, | |
686 is_tlab /* is_tlab */, | |
687 number_of_generations() - 1 /* max_level */); | |
688 } | |
689 | |
690 result = gch->attempt_allocation(size, is_tlab, false /*first_only*/); | |
691 | |
692 if (result != NULL) { | |
693 assert(gch->is_in_reserved(result), "result not in heap"); | |
694 return result; | |
695 } | |
696 | |
697 // OK, collection failed, try expansion. | |
698 result = expand_heap_and_allocate(size, is_tlab); | |
699 if (result != NULL) { | |
700 return result; | |
701 } | |
702 | |
703 // If we reach this point, we're really out of memory. Try every trick | |
704 // we can to reclaim memory. Force collection of soft references. Force | |
705 // a complete compaction of the heap. Any additional methods for finding | |
706 // free memory should be here, especially if they are expensive. If this | |
707 // attempt fails, an OOM exception will be thrown. | |
708 { | |
10287
12f651e29f6b
6843347: Boundary values in some public GC options cause crashes
tschatzl
parents:
10284
diff
changeset
|
709 UIntFlagSetting flag_change(MarkSweepAlwaysCompactCount, 1); // Make sure the heap is fully compacted |
0 | 710 |
711 gch->do_collection(true /* full */, | |
712 true /* clear_all_soft_refs */, | |
713 size /* size */, | |
714 is_tlab /* is_tlab */, | |
715 number_of_generations() - 1 /* max_level */); | |
716 } | |
717 | |
718 result = gch->attempt_allocation(size, is_tlab, false /* first_only */); | |
719 if (result != NULL) { | |
720 assert(gch->is_in_reserved(result), "result not in heap"); | |
721 return result; | |
722 } | |
723 | |
1387
0bfd3fb24150
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
jmasa
parents:
1064
diff
changeset
|
724 assert(!should_clear_all_soft_refs(), |
0bfd3fb24150
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
jmasa
parents:
1064
diff
changeset
|
725 "Flag should have been handled and cleared prior to this point"); |
0bfd3fb24150
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
jmasa
parents:
1064
diff
changeset
|
726 |
0 | 727 // What else? We might try synchronous finalization later. If the total |
728 // space available is large enough for the allocation, then a more | |
729 // complete compaction phase than we've tried so far might be | |
730 // appropriate. | |
731 return NULL; | |
732 } | |
733 | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
3960
diff
changeset
|
734 MetaWord* CollectorPolicy::satisfy_failed_metadata_allocation( |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
3960
diff
changeset
|
735 ClassLoaderData* loader_data, |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
3960
diff
changeset
|
736 size_t word_size, |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
3960
diff
changeset
|
737 Metaspace::MetadataType mdtype) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
3960
diff
changeset
|
738 uint loop_count = 0; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
3960
diff
changeset
|
739 uint gc_count = 0; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
3960
diff
changeset
|
740 uint full_gc_count = 0; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
3960
diff
changeset
|
741 |
6923
3fadc0e8cffe
8000988: VM deadlock when running btree006 on windows-i586
jmasa
parents:
6753
diff
changeset
|
742 assert(!Heap_lock->owned_by_self(), "Should not be holding the Heap_lock"); |
3fadc0e8cffe
8000988: VM deadlock when running btree006 on windows-i586
jmasa
parents:
6753
diff
changeset
|
743 |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
3960
diff
changeset
|
744 do { |
6753
8da5e203b993
7197557: NPG: nsk/sysdict/vm/stress/chain/chain004 hangs intermittently
jmasa
parents:
6725
diff
changeset
|
745 MetaWord* result = NULL; |
8da5e203b993
7197557: NPG: nsk/sysdict/vm/stress/chain/chain004 hangs intermittently
jmasa
parents:
6725
diff
changeset
|
746 if (GC_locker::is_active_and_needs_gc()) { |
8da5e203b993
7197557: NPG: nsk/sysdict/vm/stress/chain/chain004 hangs intermittently
jmasa
parents:
6725
diff
changeset
|
747 // If the GC_locker is active, just expand and allocate. |
8da5e203b993
7197557: NPG: nsk/sysdict/vm/stress/chain/chain004 hangs intermittently
jmasa
parents:
6725
diff
changeset
|
748 // If that does not succeed, wait if this thread is not |
8da5e203b993
7197557: NPG: nsk/sysdict/vm/stress/chain/chain004 hangs intermittently
jmasa
parents:
6725
diff
changeset
|
749 // in a critical section itself. |
8da5e203b993
7197557: NPG: nsk/sysdict/vm/stress/chain/chain004 hangs intermittently
jmasa
parents:
6725
diff
changeset
|
750 result = |
8da5e203b993
7197557: NPG: nsk/sysdict/vm/stress/chain/chain004 hangs intermittently
jmasa
parents:
6725
diff
changeset
|
751 loader_data->metaspace_non_null()->expand_and_allocate(word_size, |
8da5e203b993
7197557: NPG: nsk/sysdict/vm/stress/chain/chain004 hangs intermittently
jmasa
parents:
6725
diff
changeset
|
752 mdtype); |
8da5e203b993
7197557: NPG: nsk/sysdict/vm/stress/chain/chain004 hangs intermittently
jmasa
parents:
6725
diff
changeset
|
753 if (result != NULL) { |
8da5e203b993
7197557: NPG: nsk/sysdict/vm/stress/chain/chain004 hangs intermittently
jmasa
parents:
6725
diff
changeset
|
754 return result; |
8da5e203b993
7197557: NPG: nsk/sysdict/vm/stress/chain/chain004 hangs intermittently
jmasa
parents:
6725
diff
changeset
|
755 } |
8da5e203b993
7197557: NPG: nsk/sysdict/vm/stress/chain/chain004 hangs intermittently
jmasa
parents:
6725
diff
changeset
|
756 JavaThread* jthr = JavaThread::current(); |
8da5e203b993
7197557: NPG: nsk/sysdict/vm/stress/chain/chain004 hangs intermittently
jmasa
parents:
6725
diff
changeset
|
757 if (!jthr->in_critical()) { |
8da5e203b993
7197557: NPG: nsk/sysdict/vm/stress/chain/chain004 hangs intermittently
jmasa
parents:
6725
diff
changeset
|
758 // Wait for JNI critical section to be exited |
8da5e203b993
7197557: NPG: nsk/sysdict/vm/stress/chain/chain004 hangs intermittently
jmasa
parents:
6725
diff
changeset
|
759 GC_locker::stall_until_clear(); |
8da5e203b993
7197557: NPG: nsk/sysdict/vm/stress/chain/chain004 hangs intermittently
jmasa
parents:
6725
diff
changeset
|
760 // The GC invoked by the last thread leaving the critical |
8da5e203b993
7197557: NPG: nsk/sysdict/vm/stress/chain/chain004 hangs intermittently
jmasa
parents:
6725
diff
changeset
|
761 // section will be a young collection and a full collection |
8da5e203b993
7197557: NPG: nsk/sysdict/vm/stress/chain/chain004 hangs intermittently
jmasa
parents:
6725
diff
changeset
|
762 // is (currently) needed for unloading classes so continue |
8da5e203b993
7197557: NPG: nsk/sysdict/vm/stress/chain/chain004 hangs intermittently
jmasa
parents:
6725
diff
changeset
|
763 // to the next iteration to get a full GC. |
8da5e203b993
7197557: NPG: nsk/sysdict/vm/stress/chain/chain004 hangs intermittently
jmasa
parents:
6725
diff
changeset
|
764 continue; |
8da5e203b993
7197557: NPG: nsk/sysdict/vm/stress/chain/chain004 hangs intermittently
jmasa
parents:
6725
diff
changeset
|
765 } else { |
8da5e203b993
7197557: NPG: nsk/sysdict/vm/stress/chain/chain004 hangs intermittently
jmasa
parents:
6725
diff
changeset
|
766 if (CheckJNICalls) { |
8da5e203b993
7197557: NPG: nsk/sysdict/vm/stress/chain/chain004 hangs intermittently
jmasa
parents:
6725
diff
changeset
|
767 fatal("Possible deadlock due to allocating while" |
8da5e203b993
7197557: NPG: nsk/sysdict/vm/stress/chain/chain004 hangs intermittently
jmasa
parents:
6725
diff
changeset
|
768 " in jni critical section"); |
8da5e203b993
7197557: NPG: nsk/sysdict/vm/stress/chain/chain004 hangs intermittently
jmasa
parents:
6725
diff
changeset
|
769 } |
8da5e203b993
7197557: NPG: nsk/sysdict/vm/stress/chain/chain004 hangs intermittently
jmasa
parents:
6725
diff
changeset
|
770 return NULL; |
8da5e203b993
7197557: NPG: nsk/sysdict/vm/stress/chain/chain004 hangs intermittently
jmasa
parents:
6725
diff
changeset
|
771 } |
8da5e203b993
7197557: NPG: nsk/sysdict/vm/stress/chain/chain004 hangs intermittently
jmasa
parents:
6725
diff
changeset
|
772 } |
8da5e203b993
7197557: NPG: nsk/sysdict/vm/stress/chain/chain004 hangs intermittently
jmasa
parents:
6725
diff
changeset
|
773 |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
3960
diff
changeset
|
774 { // Need lock to get self consistent gc_count's |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
3960
diff
changeset
|
775 MutexLocker ml(Heap_lock); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
3960
diff
changeset
|
776 gc_count = Universe::heap()->total_collections(); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
3960
diff
changeset
|
777 full_gc_count = Universe::heap()->total_full_collections(); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
3960
diff
changeset
|
778 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
3960
diff
changeset
|
779 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
3960
diff
changeset
|
780 // Generate a VM operation |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
3960
diff
changeset
|
781 VM_CollectForMetadataAllocation op(loader_data, |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
3960
diff
changeset
|
782 word_size, |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
3960
diff
changeset
|
783 mdtype, |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
3960
diff
changeset
|
784 gc_count, |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
3960
diff
changeset
|
785 full_gc_count, |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
3960
diff
changeset
|
786 GCCause::_metadata_GC_threshold); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
3960
diff
changeset
|
787 VMThread::execute(&op); |
7446
e51c9860cf66
8005082: NPG: Add specialized Metachunk sizes for reflection and anonymous classloaders
jmasa
parents:
7180
diff
changeset
|
788 |
e51c9860cf66
8005082: NPG: Add specialized Metachunk sizes for reflection and anonymous classloaders
jmasa
parents:
7180
diff
changeset
|
789 // If GC was locked out, try again. Check |
e51c9860cf66
8005082: NPG: Add specialized Metachunk sizes for reflection and anonymous classloaders
jmasa
parents:
7180
diff
changeset
|
790 // before checking success because the prologue |
e51c9860cf66
8005082: NPG: Add specialized Metachunk sizes for reflection and anonymous classloaders
jmasa
parents:
7180
diff
changeset
|
791 // could have succeeded and the GC still have |
e51c9860cf66
8005082: NPG: Add specialized Metachunk sizes for reflection and anonymous classloaders
jmasa
parents:
7180
diff
changeset
|
792 // been locked out. |
e51c9860cf66
8005082: NPG: Add specialized Metachunk sizes for reflection and anonymous classloaders
jmasa
parents:
7180
diff
changeset
|
793 if (op.gc_locked()) { |
e51c9860cf66
8005082: NPG: Add specialized Metachunk sizes for reflection and anonymous classloaders
jmasa
parents:
7180
diff
changeset
|
794 continue; |
e51c9860cf66
8005082: NPG: Add specialized Metachunk sizes for reflection and anonymous classloaders
jmasa
parents:
7180
diff
changeset
|
795 } |
e51c9860cf66
8005082: NPG: Add specialized Metachunk sizes for reflection and anonymous classloaders
jmasa
parents:
7180
diff
changeset
|
796 |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
3960
diff
changeset
|
797 if (op.prologue_succeeded()) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
3960
diff
changeset
|
798 return op.result(); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
3960
diff
changeset
|
799 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
3960
diff
changeset
|
800 loop_count++; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
3960
diff
changeset
|
801 if ((QueuedAllocationWarningCount > 0) && |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
3960
diff
changeset
|
802 (loop_count % QueuedAllocationWarningCount == 0)) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
3960
diff
changeset
|
803 warning("satisfy_failed_metadata_allocation() retries %d times \n\t" |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
3960
diff
changeset
|
804 " size=%d", loop_count, word_size); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
3960
diff
changeset
|
805 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
3960
diff
changeset
|
806 } while (true); // Until a GC is done |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
3960
diff
changeset
|
807 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
3960
diff
changeset
|
808 |
0 | 809 // Return true if any of the following is true: |
810 // . the allocation won't fit into the current young gen heap | |
811 // . gc locker is occupied (jni critical section) | |
812 // . heap memory is tight -- the most recent previous collection | |
813 // was a full collection because a partial collection (would | |
814 // have) failed and is likely to fail again | |
815 bool GenCollectorPolicy::should_try_older_generation_allocation( | |
816 size_t word_size) const { | |
817 GenCollectedHeap* gch = GenCollectedHeap::heap(); | |
818 size_t gen0_capacity = gch->get_gen(0)->capacity_before_gc(); | |
819 return (word_size > heap_word_size(gen0_capacity)) | |
1888
a7214d79fcf1
6896603: CMS/GCH: collection_attempt_is_safe() ergo should use more recent data
ysr
parents:
1795
diff
changeset
|
820 || GC_locker::is_active_and_needs_gc() |
a7214d79fcf1
6896603: CMS/GCH: collection_attempt_is_safe() ergo should use more recent data
ysr
parents:
1795
diff
changeset
|
821 || gch->incremental_collection_failed(); |
0 | 822 } |
823 | |
824 | |
825 // | |
826 // MarkSweepPolicy methods | |
827 // | |
828 | |
829 MarkSweepPolicy::MarkSweepPolicy() { | |
830 initialize_all(); | |
831 } | |
832 | |
833 void MarkSweepPolicy::initialize_generations() { | |
10271
f9be75d21404
8012902: remove use of global operator new - take 2
minqi
parents:
10241
diff
changeset
|
834 _generations = NEW_C_HEAP_ARRAY3(GenerationSpecPtr, number_of_generations(), mtGC, 0, AllocFailStrategy::RETURN_NULL); |
13059
46d7652b223c
8026853: Prepare GC code for collector policy regression fix
jwilhelm
parents:
13058
diff
changeset
|
835 if (_generations == NULL) { |
0 | 836 vm_exit_during_initialization("Unable to allocate gen spec"); |
13059
46d7652b223c
8026853: Prepare GC code for collector policy regression fix
jwilhelm
parents:
13058
diff
changeset
|
837 } |
0 | 838 |
7451
ca0a78017dc7
8005396: Use ParNew with only one thread instead of DefNew as default for CMS on single CPU machines
brutisso
parents:
7446
diff
changeset
|
839 if (UseParNewGC) { |
0 | 840 _generations[0] = new GenerationSpec(Generation::ParNew, _initial_gen0_size, _max_gen0_size); |
841 } else { | |
842 _generations[0] = new GenerationSpec(Generation::DefNew, _initial_gen0_size, _max_gen0_size); | |
843 } | |
844 _generations[1] = new GenerationSpec(Generation::MarkSweepCompact, _initial_gen1_size, _max_gen1_size); | |
845 | |
13059
46d7652b223c
8026853: Prepare GC code for collector policy regression fix
jwilhelm
parents:
13058
diff
changeset
|
846 if (_generations[0] == NULL || _generations[1] == NULL) { |
0 | 847 vm_exit_during_initialization("Unable to allocate gen spec"); |
13059
46d7652b223c
8026853: Prepare GC code for collector policy regression fix
jwilhelm
parents:
13058
diff
changeset
|
848 } |
0 | 849 } |
850 | |
851 void MarkSweepPolicy::initialize_gc_policy_counters() { | |
852 // initialize the policy counters - 2 collectors, 3 generations | |
7451
ca0a78017dc7
8005396: Use ParNew with only one thread instead of DefNew as default for CMS on single CPU machines
brutisso
parents:
7446
diff
changeset
|
853 if (UseParNewGC) { |
0 | 854 _gc_policy_counters = new GCPolicyCounters("ParNew:MSC", 2, 3); |
7451
ca0a78017dc7
8005396: Use ParNew with only one thread instead of DefNew as default for CMS on single CPU machines
brutisso
parents:
7446
diff
changeset
|
855 } else { |
0 | 856 _gc_policy_counters = new GCPolicyCounters("Copy:MSC", 2, 3); |
857 } | |
858 } |