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annotate src/share/vm/gc_implementation/shared/gSpaceCounters.hpp @ 20256:b0b97602393a
8033923: Use BufferingOopClosure for G1 code root scanning
Reviewed-by: mgerdin, brutisso
author | stefank |
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date | Mon, 10 Feb 2014 12:58:09 +0100 |
parents | 55fb97c4c58d |
children | 4ca6dc0799b6 |
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0 | 1 /* |
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2 * Copyright (c) 2002, 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 * | |
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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 #ifndef SHARE_VM_GC_IMPLEMENTATION_SHARED_GSPACECOUNTERS_HPP |
26 #define SHARE_VM_GC_IMPLEMENTATION_SHARED_GSPACECOUNTERS_HPP | |
27 | |
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28 #include "utilities/macros.hpp" |
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29 #if INCLUDE_ALL_GCS |
1972 | 30 #include "gc_implementation/shared/generationCounters.hpp" |
31 #include "memory/generation.hpp" | |
32 #include "runtime/perfData.hpp" | |
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33 #endif // INCLUDE_ALL_GCS |
1972 | 34 |
0 | 35 // A GSpaceCounter is a holder class for performance counters |
36 // that track a space; | |
37 | |
6197 | 38 class GSpaceCounters: public CHeapObj<mtGC> { |
0 | 39 friend class VMStructs; |
40 | |
41 private: | |
42 PerfVariable* _capacity; | |
43 PerfVariable* _used; | |
44 | |
45 // Constant PerfData types don't need to retain a reference. | |
46 // However, it's a good idea to document them here. | |
47 // PerfConstant* _size; | |
48 | |
49 Generation* _gen; | |
50 char* _name_space; | |
51 | |
52 public: | |
53 | |
54 GSpaceCounters(const char* name, int ordinal, size_t max_size, Generation* g, | |
55 GenerationCounters* gc, bool sampled=true); | |
56 | |
57 ~GSpaceCounters() { | |
6197 | 58 if (_name_space != NULL) FREE_C_HEAP_ARRAY(char, _name_space, mtGC); |
0 | 59 } |
60 | |
61 inline void update_capacity() { | |
62 _capacity->set_value(_gen->capacity()); | |
63 } | |
64 | |
65 inline void update_used() { | |
66 _used->set_value(_gen->used()); | |
67 } | |
68 | |
69 // special version of update_used() to allow the used value to be | |
70 // passed as a parameter. This method can can be used in cases were | |
71 // the utilization is already known and/or when the _gen->used() | |
72 // method is known to be expensive and we want to avoid unnecessary | |
73 // calls to it. | |
74 // | |
75 inline void update_used(size_t used) { | |
76 _used->set_value(used); | |
77 } | |
78 | |
79 inline void inc_used(size_t size) { | |
80 _used->inc(size); | |
81 } | |
82 | |
83 debug_only( | |
84 // for security reasons, we do not allow arbitrary reads from | |
85 // the counters as they may live in shared memory. | |
86 jlong used() { | |
87 return _used->get_value(); | |
88 } | |
89 jlong capacity() { | |
90 return _used->get_value(); | |
91 } | |
92 ) | |
93 | |
94 inline void update_all() { | |
95 update_used(); | |
96 update_capacity(); | |
97 } | |
98 | |
99 const char* name_space() const { return _name_space; } | |
100 }; | |
101 | |
102 class GenerationUsedHelper : public PerfLongSampleHelper { | |
103 private: | |
104 Generation* _gen; | |
105 | |
106 public: | |
107 GenerationUsedHelper(Generation* g) : _gen(g) { } | |
108 | |
109 inline jlong take_sample() { | |
110 return _gen->used(); | |
111 } | |
112 }; | |
1972 | 113 |
114 #endif // SHARE_VM_GC_IMPLEMENTATION_SHARED_GSPACECOUNTERS_HPP |