Mercurial > hg > graal-jvmci-8
annotate src/share/vm/gc_implementation/shared/ageTable.hpp @ 22973:340ca8812af9
8067469: G1 ignores AlwaysPreTouch
Summary: Factor out pretouch code of the various virtual space management classes and use them everywhere including in G1.
Reviewed-by: stefank, ehelin, dholmes
author | tschatzl |
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date | Thu, 18 Dec 2014 09:37:02 +0100 |
parents | f2e3f0e1f97d |
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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) { | |
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58 add(p->age(), oop_size); |
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59 } |
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60 |
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61 void add(uint age, size_t oop_size) { |
0 | 62 assert(age > 0 && age < table_size, "invalid age of object"); |
63 sizes[age] += oop_size; | |
64 } | |
65 | |
66 // Merge another age table with the current one. Used | |
67 // for parallel young generation gc. | |
68 void merge(ageTable* subTable); | |
545 | 69 void merge_par(ageTable* subTable); |
0 | 70 |
71 // calculate new tenuring threshold based on age information | |
6818 | 72 uint compute_tenuring_threshold(size_t survivor_capacity); |
0 | 73 |
74 private: | |
75 PerfVariable* _perf_sizes[table_size]; | |
76 }; | |
1972 | 77 |
78 #endif // SHARE_VM_GC_IMPLEMENTATION_SHARED_AGETABLE_HPP |