Mercurial > hg > graal-compiler
annotate src/share/vm/gc_implementation/parNew/asParNewGeneration.hpp @ 1843:0715f0cf171d
Merge
author | jcoomes |
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date | Fri, 08 Oct 2010 09:29:09 -0700 |
parents | c18cbe5936b8 |
children | f95d63e2154a |
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0 | 1 /* |
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2 * Copyright (c) 2005, 2006, Oracle and/or its affiliates. All rights reserved. |
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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 Generation that does parallel young-gen collection extended | |
26 // for adaptive size policy. | |
27 | |
28 // Division of generation into spaces | |
29 // done by DefNewGeneration::compute_space_boundaries() | |
30 // +---------------+ | |
31 // | uncommitted | | |
32 // |---------------| | |
33 // | ss0 | | |
34 // |---------------| | |
35 // | ss1 | | |
36 // |---------------| | |
37 // | | | |
38 // | eden | | |
39 // | | | |
40 // +---------------+ <-- low end of VirtualSpace | |
41 // | |
42 class ASParNewGeneration: public ParNewGeneration { | |
43 | |
44 size_t _min_gen_size; | |
45 | |
46 // Resize the generation based on the desired sizes of | |
47 // the constituent spaces. | |
48 bool resize_generation(size_t eden_size, size_t survivor_size); | |
49 // Resize the spaces based on their desired sizes but | |
50 // respecting the maximum size of the generation. | |
51 void resize_spaces(size_t eden_size, size_t survivor_size); | |
52 // Return the byte size remaining to the minimum generation size. | |
53 size_t available_to_min_gen(); | |
54 // Return the byte size remaining to the live data in the generation. | |
55 size_t available_to_live() const; | |
56 // Return the byte size that the generation is allowed to shrink. | |
57 size_t limit_gen_shrink(size_t bytes); | |
58 // Reset the size of the spaces after a shrink of the generation. | |
59 void reset_survivors_after_shrink(); | |
60 | |
61 // Accessor | |
62 VirtualSpace* virtual_space() { return &_virtual_space; } | |
63 | |
64 virtual void adjust_desired_tenuring_threshold(); | |
65 | |
66 public: | |
67 | |
68 ASParNewGeneration(ReservedSpace rs, | |
69 size_t initial_byte_size, | |
70 size_t min_byte_size, | |
71 int level); | |
72 | |
73 virtual const char* short_name() const { return "ASParNew"; } | |
74 virtual const char* name() const; | |
75 virtual Generation::Name kind() { return ASParNew; } | |
76 | |
77 // Change the sizes of eden and the survivor spaces in | |
78 // the generation. The parameters are desired sizes | |
79 // and are not guaranteed to be met. For example, if | |
80 // the total is larger than the generation. | |
81 void resize(size_t eden_size, size_t survivor_size); | |
82 | |
83 virtual void compute_new_size(); | |
84 | |
85 size_t max_gen_size() { return _reserved.byte_size(); } | |
86 size_t min_gen_size() const { return _min_gen_size; } | |
87 | |
88 // Space boundary invariant checker | |
89 void space_invariants() PRODUCT_RETURN; | |
90 }; |