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comparison src/share/vm/gc_implementation/shared/hSpaceCounters.hpp @ 3289:b52782ae3880

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6946417: G1: Java VisualVM does not support G1 properly. Summary: Added counters for jstat Reviewed-by: tonyp, jwilhelm, stefank, ysr, johnc
author jmasa
date Thu, 21 Apr 2011 10:23:44 -0700
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children d2a62e0f25eb
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3288:c0dcda80820f 3289:b52782ae3880
1 /*
2 * Copyright (c) 2011, Oracle and/or its affiliates. All rights reserved.
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 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #ifndef SHARE_VM_GC_IMPLEMENTATION_SHARED_HSPACECOUNTERS_HPP
26 #define SHARE_VM_GC_IMPLEMENTATION_SHARED_HSPACECOUNTERS_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
34 // A HSpaceCounter is a holder class for performance counters
35 // that track a collections (logical spaces) in a heap;
36
37 class HeapSpaceUsedHelper;
38 class G1SpaceMonitoringSupport;
39
40 class HSpaceCounters: public CHeapObj {
41 friend class VMStructs;
42
43 private:
44 PerfVariable* _capacity;
45 PerfVariable* _used;
46
47 // Constant PerfData types don't need to retain a reference.
48 // However, it's a good idea to document them here.
49
50 char* _name_space;
51
52 public:
53
54 HSpaceCounters(const char* name, int ordinal, size_t max_size,
55 size_t initial_capacity, GenerationCounters* gc);
56
57 ~HSpaceCounters() {
58 if (_name_space != NULL) FREE_C_HEAP_ARRAY(char, _name_space);
59 }
60
61 inline void update_capacity(size_t v) {
62 _capacity->set_value(v);
63 }
64
65 inline void update_used(size_t v) {
66 _used->set_value(v);
67 }
68
69 debug_only(
70 // for security reasons, we do not allow arbitrary reads from
71 // the counters as they may live in shared memory.
72 jlong used() {
73 return _used->get_value();
74 }
75 jlong capacity() {
76 return _used->get_value();
77 }
78 )
79
80 inline void update_all(size_t capacity, size_t used) {
81 update_capacity(capacity);
82 update_used(used);
83 }
84
85 const char* name_space() const { return _name_space; }
86 };
87 #endif // SHARE_VM_GC_IMPLEMENTATION_SHARED_HSPACECOUNTERS_HPP