Mercurial > hg > graal-compiler
annotate src/share/vm/gc_implementation/parNew/asParNewGeneration.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 |
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rev | line source |
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0 | 1 /* |
1972 | 2 * Copyright (c) 2005, 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 | |
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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 | |
1972 | 25 #ifndef SHARE_VM_GC_IMPLEMENTATION_PARNEW_ASPARNEWGENERATION_HPP |
26 #define SHARE_VM_GC_IMPLEMENTATION_PARNEW_ASPARNEWGENERATION_HPP | |
27 | |
28 #include "gc_implementation/parNew/parNewGeneration.hpp" | |
29 #include "gc_implementation/shared/adaptiveSizePolicy.hpp" | |
30 | |
0 | 31 // A Generation that does parallel young-gen collection extended |
32 // for adaptive size policy. | |
33 | |
34 // Division of generation into spaces | |
35 // done by DefNewGeneration::compute_space_boundaries() | |
36 // +---------------+ | |
37 // | uncommitted | | |
38 // |---------------| | |
39 // | ss0 | | |
40 // |---------------| | |
41 // | ss1 | | |
42 // |---------------| | |
43 // | | | |
44 // | eden | | |
45 // | | | |
46 // +---------------+ <-- low end of VirtualSpace | |
47 // | |
48 class ASParNewGeneration: public ParNewGeneration { | |
49 | |
50 size_t _min_gen_size; | |
51 | |
52 // Resize the generation based on the desired sizes of | |
53 // the constituent spaces. | |
54 bool resize_generation(size_t eden_size, size_t survivor_size); | |
55 // Resize the spaces based on their desired sizes but | |
56 // respecting the maximum size of the generation. | |
57 void resize_spaces(size_t eden_size, size_t survivor_size); | |
58 // Return the byte size remaining to the minimum generation size. | |
59 size_t available_to_min_gen(); | |
60 // Return the byte size remaining to the live data in the generation. | |
61 size_t available_to_live() const; | |
62 // Return the byte size that the generation is allowed to shrink. | |
63 size_t limit_gen_shrink(size_t bytes); | |
64 // Reset the size of the spaces after a shrink of the generation. | |
65 void reset_survivors_after_shrink(); | |
66 | |
67 // Accessor | |
68 VirtualSpace* virtual_space() { return &_virtual_space; } | |
69 | |
70 virtual void adjust_desired_tenuring_threshold(); | |
71 | |
72 public: | |
73 | |
74 ASParNewGeneration(ReservedSpace rs, | |
75 size_t initial_byte_size, | |
76 size_t min_byte_size, | |
77 int level); | |
78 | |
79 virtual const char* short_name() const { return "ASParNew"; } | |
80 virtual const char* name() const; | |
81 virtual Generation::Name kind() { return ASParNew; } | |
82 | |
83 // Change the sizes of eden and the survivor spaces in | |
84 // the generation. The parameters are desired sizes | |
85 // and are not guaranteed to be met. For example, if | |
86 // the total is larger than the generation. | |
87 void resize(size_t eden_size, size_t survivor_size); | |
88 | |
89 virtual void compute_new_size(); | |
90 | |
91 size_t max_gen_size() { return _reserved.byte_size(); } | |
92 size_t min_gen_size() const { return _min_gen_size; } | |
93 | |
94 // Space boundary invariant checker | |
95 void space_invariants() PRODUCT_RETURN; | |
96 }; | |
1972 | 97 |
98 #endif // SHARE_VM_GC_IMPLEMENTATION_PARNEW_ASPARNEWGENERATION_HPP |