Mercurial > hg > truffle
annotate src/share/vm/gc_implementation/concurrentMarkSweep/cmsCollectorPolicy.cpp @ 6615:09aad8452938
7190310: Inlining WeakReference.get(), and hoisting $referent may lead to non-terminating loops
Summary: In C2 add software membar after load from Reference.referent field to prevent commoning of loads across safepoint since GC can change its value. In C1 always generate Reference.get() intrinsic.
Reviewed-by: roland, twisti, dholmes, johnc
author | kvn |
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date | Mon, 20 Aug 2012 09:58:58 -0700 |
parents | f08d439fab8c |
children | da91efe96a93 |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 2007, 2010, 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 | |
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7 * published by the Free Software Foundation. | |
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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 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
1972 | 25 #include "precompiled.hpp" |
26 #include "gc_implementation/concurrentMarkSweep/cmsAdaptiveSizePolicy.hpp" | |
27 #include "gc_implementation/concurrentMarkSweep/cmsCollectorPolicy.hpp" | |
28 #include "gc_implementation/concurrentMarkSweep/cmsGCAdaptivePolicyCounters.hpp" | |
29 #include "gc_implementation/parNew/parNewGeneration.hpp" | |
30 #include "gc_implementation/shared/gcPolicyCounters.hpp" | |
31 #include "gc_implementation/shared/vmGCOperations.hpp" | |
32 #include "memory/cardTableRS.hpp" | |
33 #include "memory/collectorPolicy.hpp" | |
34 #include "memory/gcLocker.inline.hpp" | |
35 #include "memory/genCollectedHeap.hpp" | |
36 #include "memory/generationSpec.hpp" | |
37 #include "memory/space.hpp" | |
38 #include "memory/universe.hpp" | |
39 #include "runtime/arguments.hpp" | |
40 #include "runtime/globals_extension.hpp" | |
41 #include "runtime/handles.inline.hpp" | |
42 #include "runtime/java.hpp" | |
43 #include "runtime/vmThread.hpp" | |
44 #ifdef TARGET_OS_FAMILY_linux | |
45 # include "thread_linux.inline.hpp" | |
46 #endif | |
47 #ifdef TARGET_OS_FAMILY_solaris | |
48 # include "thread_solaris.inline.hpp" | |
49 #endif | |
50 #ifdef TARGET_OS_FAMILY_windows | |
51 # include "thread_windows.inline.hpp" | |
52 #endif | |
3960 | 53 #ifdef TARGET_OS_FAMILY_bsd |
54 # include "thread_bsd.inline.hpp" | |
55 #endif | |
0 | 56 |
57 // | |
58 // ConcurrentMarkSweepPolicy methods | |
59 // | |
60 | |
61 ConcurrentMarkSweepPolicy::ConcurrentMarkSweepPolicy() { | |
62 initialize_all(); | |
63 } | |
64 | |
65 void ConcurrentMarkSweepPolicy::initialize_generations() { | |
66 initialize_perm_generation(PermGen::ConcurrentMarkSweep); | |
67 _generations = new GenerationSpecPtr[number_of_generations()]; | |
68 if (_generations == NULL) | |
69 vm_exit_during_initialization("Unable to allocate gen spec"); | |
70 | |
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71 if (ParNewGeneration::in_use()) { |
0 | 72 if (UseAdaptiveSizePolicy) { |
73 _generations[0] = new GenerationSpec(Generation::ASParNew, | |
74 _initial_gen0_size, _max_gen0_size); | |
75 } else { | |
76 _generations[0] = new GenerationSpec(Generation::ParNew, | |
77 _initial_gen0_size, _max_gen0_size); | |
78 } | |
79 } else { | |
80 _generations[0] = new GenerationSpec(Generation::DefNew, | |
81 _initial_gen0_size, _max_gen0_size); | |
82 } | |
83 if (UseAdaptiveSizePolicy) { | |
84 _generations[1] = new GenerationSpec(Generation::ASConcurrentMarkSweep, | |
85 _initial_gen1_size, _max_gen1_size); | |
86 } else { | |
87 _generations[1] = new GenerationSpec(Generation::ConcurrentMarkSweep, | |
88 _initial_gen1_size, _max_gen1_size); | |
89 } | |
90 | |
91 if (_generations[0] == NULL || _generations[1] == NULL) { | |
92 vm_exit_during_initialization("Unable to allocate gen spec"); | |
93 } | |
94 } | |
95 | |
96 void ConcurrentMarkSweepPolicy::initialize_size_policy(size_t init_eden_size, | |
97 size_t init_promo_size, | |
98 size_t init_survivor_size) { | |
99 double max_gc_minor_pause_sec = ((double) MaxGCMinorPauseMillis)/1000.0; | |
100 double max_gc_pause_sec = ((double) MaxGCPauseMillis)/1000.0; | |
101 _size_policy = new CMSAdaptiveSizePolicy(init_eden_size, | |
102 init_promo_size, | |
103 init_survivor_size, | |
104 max_gc_minor_pause_sec, | |
105 max_gc_pause_sec, | |
106 GCTimeRatio); | |
107 } | |
108 | |
109 void ConcurrentMarkSweepPolicy::initialize_gc_policy_counters() { | |
110 // initialize the policy counters - 2 collectors, 3 generations | |
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111 if (ParNewGeneration::in_use()) { |
0 | 112 _gc_policy_counters = new GCPolicyCounters("ParNew:CMS", 2, 3); |
113 } | |
114 else { | |
115 _gc_policy_counters = new GCPolicyCounters("Copy:CMS", 2, 3); | |
116 } | |
117 } | |
118 | |
119 // Returns true if the incremental mode is enabled. | |
120 bool ConcurrentMarkSweepPolicy::has_soft_ended_eden() | |
121 { | |
122 return CMSIncrementalMode; | |
123 } | |
124 | |
125 | |
126 // | |
127 // ASConcurrentMarkSweepPolicy methods | |
128 // | |
129 | |
130 void ASConcurrentMarkSweepPolicy::initialize_gc_policy_counters() { | |
131 | |
132 assert(size_policy() != NULL, "A size policy is required"); | |
133 // initialize the policy counters - 2 collectors, 3 generations | |
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134 if (ParNewGeneration::in_use()) { |
0 | 135 _gc_policy_counters = new CMSGCAdaptivePolicyCounters("ParNew:CMS", 2, 3, |
136 size_policy()); | |
137 } | |
138 else { | |
139 _gc_policy_counters = new CMSGCAdaptivePolicyCounters("Copy:CMS", 2, 3, | |
140 size_policy()); | |
141 } | |
142 } |