Mercurial > hg > graal-compiler
annotate src/share/vm/gc_implementation/shared/ageTable.hpp @ 4836:d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
Summary: Remove the separate counting phase of concurrent marking by tracking the amount of marked bytes and the cards spanned by marked objects in marking task/worker thread local data structures, which are updated as individual objects are marked.
Reviewed-by: brutisso, tonyp
author | johnc |
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date | Thu, 12 Jan 2012 00:06:47 -0800 |
parents | f95d63e2154a |
children | 22b8d3d181d9 |
rev | line source |
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0 | 1 /* |
1972 | 2 * Copyright (c) 1997, 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_AGETABLE_HPP |
26 #define SHARE_VM_GC_IMPLEMENTATION_SHARED_AGETABLE_HPP | |
27 | |
28 #include "oops/markOop.hpp" | |
29 #include "oops/oop.hpp" | |
30 #include "runtime/perfData.hpp" | |
31 | |
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32 /* Copyright (c) 1992-2009 Oracle and/or its affiliates, and Stanford University. |
0 | 33 See the LICENSE file for license information. */ |
34 | |
35 // Age table for adaptive feedback-mediated tenuring (scavenging) | |
36 // | |
37 // Note: all sizes are in oops | |
38 | |
39 class ageTable VALUE_OBJ_CLASS_SPEC { | |
40 friend class VMStructs; | |
41 | |
42 public: | |
43 // constants | |
44 enum { table_size = markOopDesc::max_age + 1 }; | |
45 | |
46 // instance variables | |
47 size_t sizes[table_size]; | |
48 | |
49 // constructor. "global" indicates that this is the global age table | |
50 // (as opposed to gc-thread-local) | |
51 ageTable(bool global = true); | |
52 | |
53 // clear table | |
54 void clear(); | |
55 | |
56 // add entry | |
57 void add(oop p, size_t oop_size) { | |
58 int age = p->age(); | |
59 assert(age > 0 && age < table_size, "invalid age of object"); | |
60 sizes[age] += oop_size; | |
61 } | |
62 | |
63 // Merge another age table with the current one. Used | |
64 // for parallel young generation gc. | |
65 void merge(ageTable* subTable); | |
545 | 66 void merge_par(ageTable* subTable); |
0 | 67 |
68 // calculate new tenuring threshold based on age information | |
69 int compute_tenuring_threshold(size_t survivor_capacity); | |
70 | |
71 private: | |
72 PerfVariable* _perf_sizes[table_size]; | |
73 }; | |
1972 | 74 |
75 #endif // SHARE_VM_GC_IMPLEMENTATION_SHARED_AGETABLE_HPP |