Mercurial > hg > graal-compiler
annotate src/share/vm/gc_implementation/shared/ageTable.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) 1997, 2009, 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 | |
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| 13 * accompanied this code). | |
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| 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 | |
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25 /* Copyright (c) 1992-2009 Oracle and/or its affiliates, and Stanford University. |
| 0 | 26 See the LICENSE file for license information. */ |
| 27 | |
| 28 // Age table for adaptive feedback-mediated tenuring (scavenging) | |
| 29 // | |
| 30 // Note: all sizes are in oops | |
| 31 | |
| 32 class ageTable VALUE_OBJ_CLASS_SPEC { | |
| 33 friend class VMStructs; | |
| 34 | |
| 35 public: | |
| 36 // constants | |
| 37 enum { table_size = markOopDesc::max_age + 1 }; | |
| 38 | |
| 39 // instance variables | |
| 40 size_t sizes[table_size]; | |
| 41 | |
| 42 // constructor. "global" indicates that this is the global age table | |
| 43 // (as opposed to gc-thread-local) | |
| 44 ageTable(bool global = true); | |
| 45 | |
| 46 // clear table | |
| 47 void clear(); | |
| 48 | |
| 49 // add entry | |
| 50 void add(oop p, size_t oop_size) { | |
| 51 int age = p->age(); | |
| 52 assert(age > 0 && age < table_size, "invalid age of object"); | |
| 53 sizes[age] += oop_size; | |
| 54 } | |
| 55 | |
| 56 // Merge another age table with the current one. Used | |
| 57 // for parallel young generation gc. | |
| 58 void merge(ageTable* subTable); | |
| 545 | 59 void merge_par(ageTable* subTable); |
| 0 | 60 |
| 61 // calculate new tenuring threshold based on age information | |
| 62 int compute_tenuring_threshold(size_t survivor_capacity); | |
| 63 | |
| 64 private: | |
| 65 PerfVariable* _perf_sizes[table_size]; | |
| 66 }; |