Mercurial > hg > graal-compiler
annotate src/share/vm/gc_implementation/g1/concurrentG1Refine.hpp @ 17844:8847586c9037
8016302: Change type of the number of GC workers to unsigned int (2)
Reviewed-by: tschatzl, jwilhelm
author | vkempik |
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date | Thu, 03 Apr 2014 17:49:31 +0400 |
parents | e72f7eecc96d |
children | 570cb6369f17 |
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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 #ifndef SHARE_VM_GC_IMPLEMENTATION_G1_CONCURRENTG1REFINE_HPP |
26 #define SHARE_VM_GC_IMPLEMENTATION_G1_CONCURRENTG1REFINE_HPP | |
27 | |
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28 #include "gc_implementation/g1/g1HotCardCache.hpp" |
1972 | 29 #include "memory/allocation.hpp" |
30 #include "runtime/thread.hpp" | |
31 #include "utilities/globalDefinitions.hpp" | |
32 | |
342 | 33 // Forward decl |
34 class ConcurrentG1RefineThread; | |
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35 class G1CollectedHeap; |
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36 class G1HotCardCache; |
342 | 37 class G1RemSet; |
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38 class DirtyCardQueue; |
342 | 39 |
6197 | 40 class ConcurrentG1Refine: public CHeapObj<mtGC> { |
794 | 41 ConcurrentG1RefineThread** _threads; |
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42 uint _n_threads; |
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43 uint _n_worker_threads; |
1111 | 44 /* |
45 * The value of the update buffer queue length falls into one of 3 zones: | |
46 * green, yellow, red. If the value is in [0, green) nothing is | |
47 * done, the buffers are left unprocessed to enable the caching effect of the | |
48 * dirtied cards. In the yellow zone [green, yellow) the concurrent refinement | |
49 * threads are gradually activated. In [yellow, red) all threads are | |
50 * running. If the length becomes red (max queue length) the mutators start | |
51 * processing the buffers. | |
52 * | |
1282 | 53 * There are some interesting cases (when G1UseAdaptiveConcRefinement |
54 * is turned off): | |
1111 | 55 * 1) green = yellow = red = 0. In this case the mutator will process all |
56 * buffers. Except for those that are created by the deferred updates | |
57 * machinery during a collection. | |
58 * 2) green = 0. Means no caching. Can be a good way to minimize the | |
59 * amount of time spent updating rsets during a collection. | |
60 */ | |
61 int _green_zone; | |
62 int _yellow_zone; | |
63 int _red_zone; | |
64 | |
65 int _thread_threshold_step; | |
66 | |
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67 // We delay the refinement of 'hot' cards using the hot card cache. |
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68 G1HotCardCache _hot_card_cache; |
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69 |
1111 | 70 // Reset the threshold step value based of the current zone boundaries. |
71 void reset_threshold_step(); | |
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72 |
342 | 73 public: |
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74 ConcurrentG1Refine(G1CollectedHeap* g1h); |
342 | 75 ~ConcurrentG1Refine(); |
76 | |
77 void init(); // Accomplish some initialization that has to wait. | |
794 | 78 void stop(); |
342 | 79 |
1111 | 80 void reinitialize_threads(); |
81 | |
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82 // Iterate over all concurrent refinement threads |
794 | 83 void threads_do(ThreadClosure *tc); |
342 | 84 |
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85 // Iterate over all worker refinement threads |
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86 void worker_threads_do(ThreadClosure * tc); |
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87 |
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88 // The RS sampling thread |
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89 ConcurrentG1RefineThread * sampling_thread() const; |
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90 |
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91 static uint thread_num(); |
1019 | 92 |
93 void print_worker_threads_on(outputStream* st) const; | |
1111 | 94 |
95 void set_green_zone(int x) { _green_zone = x; } | |
96 void set_yellow_zone(int x) { _yellow_zone = x; } | |
97 void set_red_zone(int x) { _red_zone = x; } | |
98 | |
99 int green_zone() const { return _green_zone; } | |
100 int yellow_zone() const { return _yellow_zone; } | |
101 int red_zone() const { return _red_zone; } | |
102 | |
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103 uint total_thread_num() const { return _n_threads; } |
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104 uint worker_thread_num() const { return _n_worker_threads; } |
1111 | 105 |
106 int thread_threshold_step() const { return _thread_threshold_step; } | |
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107 |
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108 G1HotCardCache* hot_card_cache() { return &_hot_card_cache; } |
342 | 109 }; |
1972 | 110 |
111 #endif // SHARE_VM_GC_IMPLEMENTATION_G1_CONCURRENTG1REFINE_HPP |