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annotate src/share/vm/gc_implementation/shared/gSpaceCounters.hpp @ 3687:7958ebb561b0
Merge
author | Lukas Stadler <lukas.stadler@jku.at> |
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date | Fri, 18 Nov 2011 17:20:38 +0100 |
parents | f95d63e2154a |
children | d2a62e0f25eb |
rev | line source |
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0 | 1 /* |
1972 | 2 * Copyright (c) 2002, 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 | |
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 | |
28 #ifndef SERIALGC | |
29 #include "gc_implementation/shared/generationCounters.hpp" | |
30 #include "memory/generation.hpp" | |
31 #include "runtime/perfData.hpp" | |
32 #endif | |
33 | |
0 | 34 // A GSpaceCounter is a holder class for performance counters |
35 // that track a space; | |
36 | |
37 class GSpaceCounters: public CHeapObj { | |
38 friend class VMStructs; | |
39 | |
40 private: | |
41 PerfVariable* _capacity; | |
42 PerfVariable* _used; | |
43 | |
44 // Constant PerfData types don't need to retain a reference. | |
45 // However, it's a good idea to document them here. | |
46 // PerfConstant* _size; | |
47 | |
48 Generation* _gen; | |
49 char* _name_space; | |
50 | |
51 public: | |
52 | |
53 GSpaceCounters(const char* name, int ordinal, size_t max_size, Generation* g, | |
54 GenerationCounters* gc, bool sampled=true); | |
55 | |
56 ~GSpaceCounters() { | |
57 if (_name_space != NULL) FREE_C_HEAP_ARRAY(char, _name_space); | |
58 } | |
59 | |
60 inline void update_capacity() { | |
61 _capacity->set_value(_gen->capacity()); | |
62 } | |
63 | |
64 inline void update_used() { | |
65 _used->set_value(_gen->used()); | |
66 } | |
67 | |
68 // special version of update_used() to allow the used value to be | |
69 // passed as a parameter. This method can can be used in cases were | |
70 // the utilization is already known and/or when the _gen->used() | |
71 // method is known to be expensive and we want to avoid unnecessary | |
72 // calls to it. | |
73 // | |
74 inline void update_used(size_t used) { | |
75 _used->set_value(used); | |
76 } | |
77 | |
78 inline void inc_used(size_t size) { | |
79 _used->inc(size); | |
80 } | |
81 | |
82 debug_only( | |
83 // for security reasons, we do not allow arbitrary reads from | |
84 // the counters as they may live in shared memory. | |
85 jlong used() { | |
86 return _used->get_value(); | |
87 } | |
88 jlong capacity() { | |
89 return _used->get_value(); | |
90 } | |
91 ) | |
92 | |
93 inline void update_all() { | |
94 update_used(); | |
95 update_capacity(); | |
96 } | |
97 | |
98 const char* name_space() const { return _name_space; } | |
99 }; | |
100 | |
101 class GenerationUsedHelper : public PerfLongSampleHelper { | |
102 private: | |
103 Generation* _gen; | |
104 | |
105 public: | |
106 GenerationUsedHelper(Generation* g) : _gen(g) { } | |
107 | |
108 inline jlong take_sample() { | |
109 return _gen->used(); | |
110 } | |
111 }; | |
1972 | 112 |
113 #endif // SHARE_VM_GC_IMPLEMENTATION_SHARED_GSPACECOUNTERS_HPP |