Mercurial > hg > graal-compiler
annotate src/share/vm/gc_implementation/shared/gSpaceCounters.hpp @ 1941:79d04223b8a5
Added caching for resolved types and resolved fields.
This is crucial, because the local load elimination will lead to wrong results, if field equality (of two RiField objects with the same object and the same RiType) is not given. The caching makes sure that the default equals implementation is sufficient.
| author | Thomas Wuerthinger <wuerthinger@ssw.jku.at> |
|---|---|
| date | Tue, 28 Dec 2010 18:33:26 +0100 |
| parents | c18cbe5936b8 |
| children | f95d63e2154a |
| rev | line source |
|---|---|
| 0 | 1 /* |
|
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2 * Copyright (c) 2002, 2004, Oracle and/or its affiliates. All rights reserved. |
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| 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. | |
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| 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 | |
| 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 }; |