Mercurial > jdk8-mips64-public > hotspot / file comparison
comparison: src/share/vm/gc_implementation/shared/gSpaceCounters.hpp
src/share/vm/gc_implementation/shared/gSpaceCounters.hpp
- changeset 435
- a61af66fc99e
- child 1907
- c18cbe5936b8
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| -1:000000000000 | 435:a61af66fc99e |
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| 1 /* | |
| 2 * Copyright 2002-2004 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, | |
| 20 * CA 95054 USA or visit www.sun.com if you need additional information or | |
| 21 * have any questions. | |
| 22 * | |
| 23 */ | |
| 24 | |
| 25 // A GSpaceCounter is a holder class for performance counters | |
| 26 // that track a space; | |
| 27 | |
| 28 class GSpaceCounters: public CHeapObj { | |
| 29 friend class VMStructs; | |
| 30 | |
| 31 private: | |
| 32 PerfVariable* _capacity; | |
| 33 PerfVariable* _used; | |
| 34 | |
| 35 // Constant PerfData types don't need to retain a reference. | |
| 36 // However, it's a good idea to document them here. | |
| 37 // PerfConstant* _size; | |
| 38 | |
| 39 Generation* _gen; | |
| 40 char* _name_space; | |
| 41 | |
| 42 public: | |
| 43 | |
| 44 GSpaceCounters(const char* name, int ordinal, size_t max_size, Generation* g, | |
| 45 GenerationCounters* gc, bool sampled=true); | |
| 46 | |
| 47 ~GSpaceCounters() { | |
| 48 if (_name_space != NULL) FREE_C_HEAP_ARRAY(char, _name_space); | |
| 49 } | |
| 50 | |
| 51 inline void update_capacity() { | |
| 52 _capacity->set_value(_gen->capacity()); | |
| 53 } | |
| 54 | |
| 55 inline void update_used() { | |
| 56 _used->set_value(_gen->used()); | |
| 57 } | |
| 58 | |
| 59 // special version of update_used() to allow the used value to be | |
| 60 // passed as a parameter. This method can can be used in cases were | |
| 61 // the utilization is already known and/or when the _gen->used() | |
| 62 // method is known to be expensive and we want to avoid unnecessary | |
| 63 // calls to it. | |
| 64 // | |
| 65 inline void update_used(size_t used) { | |
| 66 _used->set_value(used); | |
| 67 } | |
| 68 | |
| 69 inline void inc_used(size_t size) { | |
| 70 _used->inc(size); | |
| 71 } | |
| 72 | |
| 73 debug_only( | |
| 74 // for security reasons, we do not allow arbitrary reads from | |
| 75 // the counters as they may live in shared memory. | |
| 76 jlong used() { | |
| 77 return _used->get_value(); | |
| 78 } | |
| 79 jlong capacity() { | |
| 80 return _used->get_value(); | |
| 81 } | |
| 82 ) | |
| 83 | |
| 84 inline void update_all() { | |
| 85 update_used(); | |
| 86 update_capacity(); | |
| 87 } | |
| 88 | |
| 89 const char* name_space() const { return _name_space; } | |
| 90 }; | |
| 91 | |
| 92 class GenerationUsedHelper : public PerfLongSampleHelper { | |
| 93 private: | |
| 94 Generation* _gen; | |
| 95 | |
| 96 public: | |
| 97 GenerationUsedHelper(Generation* g) : _gen(g) { } | |
| 98 | |
| 99 inline jlong take_sample() { | |
| 100 return _gen->used(); | |
| 101 } | |
| 102 }; |
