Mercurial > hg > graal-compiler
annotate src/share/vm/gc_implementation/g1/concurrentG1Refine.cpp @ 21811:22ac20a25842
8055479: TLAB stability
Reviewed-by: brutisso, stefank, ahgross
author | mgerdin |
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date | Thu, 09 Oct 2014 15:42:23 +0200 |
parents | 8847586c9037 |
children | 52b4284cb496 570cb6369f17 |
rev | line source |
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342 | 1 /* |
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2 * Copyright (c) 2001, 2013, Oracle and/or its affiliates. All rights reserved. |
342 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
4 * | |
5 * This code is free software; you can redistribute it and/or modify it | |
6 * under the terms of the GNU General Public License version 2 only, as | |
7 * published by the Free Software Foundation. | |
8 * | |
9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
12 * version 2 for more details (a copy is included in the LICENSE file that | |
13 * accompanied this code). | |
14 * | |
15 * You should have received a copy of the GNU General Public License version | |
16 * 2 along with this work; if not, write to the Free Software Foundation, | |
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
18 * | |
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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. |
342 | 22 * |
23 */ | |
24 | |
1972 | 25 #include "precompiled.hpp" |
26 #include "gc_implementation/g1/concurrentG1Refine.hpp" | |
27 #include "gc_implementation/g1/concurrentG1RefineThread.hpp" | |
28 #include "gc_implementation/g1/g1CollectedHeap.inline.hpp" | |
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29 #include "gc_implementation/g1/g1HotCardCache.hpp" |
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30 #include "runtime/java.hpp" |
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31 |
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32 ConcurrentG1Refine::ConcurrentG1Refine(G1CollectedHeap* g1h) : |
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33 _threads(NULL), _n_threads(0), |
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34 _hot_card_cache(g1h) |
342 | 35 { |
1111 | 36 // Ergomonically select initial concurrent refinement parameters |
1282 | 37 if (FLAG_IS_DEFAULT(G1ConcRefinementGreenZone)) { |
38 FLAG_SET_DEFAULT(G1ConcRefinementGreenZone, MAX2<int>(ParallelGCThreads, 1)); | |
1111 | 39 } |
1282 | 40 set_green_zone(G1ConcRefinementGreenZone); |
1111 | 41 |
1282 | 42 if (FLAG_IS_DEFAULT(G1ConcRefinementYellowZone)) { |
43 FLAG_SET_DEFAULT(G1ConcRefinementYellowZone, green_zone() * 3); | |
1111 | 44 } |
1282 | 45 set_yellow_zone(MAX2<int>(G1ConcRefinementYellowZone, green_zone())); |
1111 | 46 |
1282 | 47 if (FLAG_IS_DEFAULT(G1ConcRefinementRedZone)) { |
48 FLAG_SET_DEFAULT(G1ConcRefinementRedZone, yellow_zone() * 2); | |
1111 | 49 } |
1282 | 50 set_red_zone(MAX2<int>(G1ConcRefinementRedZone, yellow_zone())); |
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51 |
1111 | 52 _n_worker_threads = thread_num(); |
53 // We need one extra thread to do the young gen rset size sampling. | |
54 _n_threads = _n_worker_threads + 1; | |
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55 |
1111 | 56 reset_threshold_step(); |
57 | |
6197 | 58 _threads = NEW_C_HEAP_ARRAY(ConcurrentG1RefineThread*, _n_threads, mtGC); |
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59 |
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60 uint worker_id_offset = DirtyCardQueueSet::num_par_ids(); |
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61 |
1111 | 62 ConcurrentG1RefineThread *next = NULL; |
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63 for (uint i = _n_threads - 1; i != UINT_MAX; i--) { |
1111 | 64 ConcurrentG1RefineThread* t = new ConcurrentG1RefineThread(this, next, worker_id_offset, i); |
65 assert(t != NULL, "Conc refine should have been created"); | |
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66 if (t->osthread() == NULL) { |
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67 vm_shutdown_during_initialization("Could not create ConcurrentG1RefineThread"); |
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68 } |
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69 |
1111 | 70 assert(t->cg1r() == this, "Conc refine thread should refer to this"); |
71 _threads[i] = t; | |
72 next = t; | |
342 | 73 } |
74 } | |
75 | |
1111 | 76 void ConcurrentG1Refine::reset_threshold_step() { |
1282 | 77 if (FLAG_IS_DEFAULT(G1ConcRefinementThresholdStep)) { |
1111 | 78 _thread_threshold_step = (yellow_zone() - green_zone()) / (worker_thread_num() + 1); |
79 } else { | |
1282 | 80 _thread_threshold_step = G1ConcRefinementThresholdStep; |
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81 } |
1111 | 82 } |
83 | |
342 | 84 void ConcurrentG1Refine::init() { |
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85 _hot_card_cache.initialize(); |
342 | 86 } |
87 | |
794 | 88 void ConcurrentG1Refine::stop() { |
89 if (_threads != NULL) { | |
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90 for (uint i = 0; i < _n_threads; i++) { |
794 | 91 _threads[i]->stop(); |
92 } | |
93 } | |
94 } | |
95 | |
1111 | 96 void ConcurrentG1Refine::reinitialize_threads() { |
97 reset_threshold_step(); | |
98 if (_threads != NULL) { | |
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99 for (uint i = 0; i < _n_threads; i++) { |
1111 | 100 _threads[i]->initialize(); |
101 } | |
102 } | |
103 } | |
104 | |
342 | 105 ConcurrentG1Refine::~ConcurrentG1Refine() { |
794 | 106 if (_threads != NULL) { |
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107 for (uint i = 0; i < _n_threads; i++) { |
794 | 108 delete _threads[i]; |
109 } | |
6197 | 110 FREE_C_HEAP_ARRAY(ConcurrentG1RefineThread*, _threads, mtGC); |
342 | 111 } |
112 } | |
113 | |
794 | 114 void ConcurrentG1Refine::threads_do(ThreadClosure *tc) { |
115 if (_threads != NULL) { | |
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116 for (uint i = 0; i < _n_threads; i++) { |
794 | 117 tc->do_thread(_threads[i]); |
118 } | |
342 | 119 } |
120 } | |
121 | |
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122 void ConcurrentG1Refine::worker_threads_do(ThreadClosure * tc) { |
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123 if (_threads != NULL) { |
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124 for (uint i = 0; i < worker_thread_num(); i++) { |
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125 tc->do_thread(_threads[i]); |
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126 } |
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127 } |
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128 } |
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129 |
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130 uint ConcurrentG1Refine::thread_num() { |
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131 uint n_threads = (G1ConcRefinementThreads > 0) ? G1ConcRefinementThreads |
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132 : ParallelGCThreads; |
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133 return MAX2<uint>(n_threads, 1); |
342 | 134 } |
1019 | 135 |
136 void ConcurrentG1Refine::print_worker_threads_on(outputStream* st) const { | |
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137 for (uint i = 0; i < _n_threads; ++i) { |
1019 | 138 _threads[i]->print_on(st); |
139 st->cr(); | |
140 } | |
141 } | |
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142 |
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143 ConcurrentG1RefineThread * ConcurrentG1Refine::sampling_thread() const { |
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144 return _threads[worker_thread_num()]; |
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145 } |