Mercurial > hg > truffle
annotate src/share/vm/gc_implementation/shared/ageTable.cpp @ 19083:09292c24d555
LSStackSlotAllocator: hide inner class.
author | Josef Eisl <josef.eisl@jku.at> |
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date | Sat, 31 Jan 2015 11:07:15 +0100 |
parents | 78bbf4d43a14 |
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0 | 1 /* |
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2 * Copyright (c) 1997, 2014, 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 * | |
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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/shared/ageTable.hpp" | |
27 #include "gc_implementation/shared/gcPolicyCounters.hpp" | |
28 #include "memory/collectorPolicy.hpp" | |
29 #include "memory/resourceArea.hpp" | |
30 #include "memory/sharedHeap.hpp" | |
31 #include "utilities/copy.hpp" | |
32 | |
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33 /* Copyright (c) 1992-2009 Oracle and/or its affiliates, and Stanford University. |
0 | 34 See the LICENSE file for license information. */ |
35 | |
36 ageTable::ageTable(bool global) { | |
37 | |
38 clear(); | |
39 | |
40 if (UsePerfData && global) { | |
41 | |
42 ResourceMark rm; | |
43 EXCEPTION_MARK; | |
44 | |
45 const char* agetable_ns = "generation.0.agetable"; | |
46 const char* bytes_ns = PerfDataManager::name_space(agetable_ns, "bytes"); | |
47 | |
48 for(int age = 0; age < table_size; age ++) { | |
49 char age_name[10]; | |
50 jio_snprintf(age_name, sizeof(age_name), "%2.2d", age); | |
51 const char* cname = PerfDataManager::counter_name(bytes_ns, age_name); | |
52 _perf_sizes[age] = PerfDataManager::create_variable(SUN_GC, cname, | |
53 PerfData::U_Bytes, | |
54 CHECK); | |
55 } | |
56 | |
57 const char* cname = PerfDataManager::counter_name(agetable_ns, "size"); | |
58 PerfDataManager::create_constant(SUN_GC, cname, PerfData::U_None, | |
59 table_size, CHECK); | |
60 } | |
61 } | |
62 | |
63 void ageTable::clear() { | |
64 for (size_t* p = sizes; p < sizes + table_size; ++p) { | |
65 *p = 0; | |
66 } | |
67 } | |
68 | |
69 void ageTable::merge(ageTable* subTable) { | |
70 for (int i = 0; i < table_size; i++) { | |
71 sizes[i]+= subTable->sizes[i]; | |
72 } | |
73 } | |
74 | |
545 | 75 void ageTable::merge_par(ageTable* subTable) { |
76 for (int i = 0; i < table_size; i++) { | |
77 Atomic::add_ptr(subTable->sizes[i], &sizes[i]); | |
78 } | |
79 } | |
80 | |
6818 | 81 uint ageTable::compute_tenuring_threshold(size_t survivor_capacity) { |
0 | 82 size_t desired_survivor_size = (size_t)((((double) survivor_capacity)*TargetSurvivorRatio)/100); |
83 size_t total = 0; | |
6818 | 84 uint age = 1; |
0 | 85 assert(sizes[0] == 0, "no objects with age zero should be recorded"); |
86 while (age < table_size) { | |
87 total += sizes[age]; | |
88 // check if including objects of age 'age' made us pass the desired | |
89 // size, if so 'age' is the new threshold | |
90 if (total > desired_survivor_size) break; | |
91 age++; | |
92 } | |
6818 | 93 uint result = age < MaxTenuringThreshold ? age : MaxTenuringThreshold; |
0 | 94 |
95 if (PrintTenuringDistribution || UsePerfData) { | |
96 | |
97 if (PrintTenuringDistribution) { | |
98 gclog_or_tty->cr(); | |
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99 gclog_or_tty->print_cr("Desired survivor size " SIZE_FORMAT " bytes, new threshold %u (max %u)", |
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100 desired_survivor_size*oopSize, result, (int) MaxTenuringThreshold); |
0 | 101 } |
102 | |
103 total = 0; | |
104 age = 1; | |
105 while (age < table_size) { | |
106 total += sizes[age]; | |
107 if (sizes[age] > 0) { | |
108 if (PrintTenuringDistribution) { | |
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109 gclog_or_tty->print_cr("- age %3u: " SIZE_FORMAT_W(10) " bytes, " SIZE_FORMAT_W(10) " total", |
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110 age, sizes[age]*oopSize, total*oopSize); |
0 | 111 } |
112 } | |
113 if (UsePerfData) { | |
114 _perf_sizes[age]->set_value(sizes[age]*oopSize); | |
115 } | |
116 age++; | |
117 } | |
118 if (UsePerfData) { | |
119 SharedHeap* sh = SharedHeap::heap(); | |
120 CollectorPolicy* policy = sh->collector_policy(); | |
121 GCPolicyCounters* gc_counters = policy->counters(); | |
122 gc_counters->tenuring_threshold()->set_value(result); | |
123 gc_counters->desired_survivor_size()->set_value( | |
124 desired_survivor_size*oopSize); | |
125 } | |
126 } | |
127 | |
128 return result; | |
129 } |