Mercurial > hg > truffle
annotate src/share/vm/services/g1MemoryPool.hpp @ 7090:05ce1defa4f9
Common out some parts of UnsafeLoad/Store in UnsafeAccess
author | Gilles Duboscq <duboscq@ssw.jku.at> |
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date | Thu, 29 Nov 2012 13:24:08 +0100 |
parents | b9a9ed0f8eeb |
children | db9981fd3124 |
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1089 | 1 /* |
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2 * Copyright (c) 2007, 2012, Oracle and/or its affiliates. All rights reserved. |
1089 | 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. |
1089 | 22 * |
23 */ | |
24 | |
1972 | 25 #ifndef SHARE_VM_SERVICES_G1MEMORYPOOL_HPP |
26 #define SHARE_VM_SERVICES_G1MEMORYPOOL_HPP | |
27 | |
28 #ifndef SERIALGC | |
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29 #include "gc_implementation/g1/g1MonitoringSupport.hpp" |
1972 | 30 #include "services/memoryPool.hpp" |
31 #include "services/memoryUsage.hpp" | |
32 #endif | |
33 | |
1089 | 34 // This file contains the three classes that represent the memory |
35 // pools of the G1 spaces: G1EdenPool, G1SurvivorPool, and | |
36 // G1OldGenPool. In G1, unlike our other GCs, we do not have a | |
37 // physical space for each of those spaces. Instead, we allocate | |
38 // regions for all three spaces out of a single pool of regions (that | |
39 // pool basically covers the entire heap). As a result, the eden, | |
40 // survivor, and old gen are considered logical spaces in G1, as each | |
41 // is a set of non-contiguous regions. This is also reflected in the | |
42 // way we map them to memory pools here. The easiest way to have done | |
43 // this would have been to map the entire G1 heap to a single memory | |
44 // pool. However, it's helpful to show how large the eden and survivor | |
45 // get, as this does affect the performance and behavior of G1. Which | |
46 // is why we introduce the three memory pools implemented here. | |
47 // | |
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48 // See comments in g1MonitoringSupport.hpp for additional details |
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49 // on this model. |
1089 | 50 // |
51 | |
52 // This class is shared by the three G1 memory pool classes | |
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53 // (G1EdenPool, G1SurvivorPool, G1OldGenPool). |
1089 | 54 class G1MemoryPoolSuper : public CollectedMemoryPool { |
55 protected: | |
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56 const static size_t _undefined_max = (size_t) -1; |
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57 G1MonitoringSupport* _g1mm; |
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58 |
1089 | 59 // Would only be called from subclasses. |
60 G1MemoryPoolSuper(G1CollectedHeap* g1h, | |
61 const char* name, | |
62 size_t init_size, | |
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63 size_t max_size, |
1089 | 64 bool support_usage_threshold); |
65 }; | |
66 | |
67 // Memory pool that represents the G1 eden. | |
68 class G1EdenPool : public G1MemoryPoolSuper { | |
69 public: | |
70 G1EdenPool(G1CollectedHeap* g1h); | |
71 | |
72 size_t used_in_bytes() { | |
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73 return _g1mm->eden_space_used(); |
1089 | 74 } |
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75 size_t max_size() const { |
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76 return _undefined_max; |
1089 | 77 } |
78 MemoryUsage get_memory_usage(); | |
79 }; | |
80 | |
81 // Memory pool that represents the G1 survivor. | |
82 class G1SurvivorPool : public G1MemoryPoolSuper { | |
83 public: | |
84 G1SurvivorPool(G1CollectedHeap* g1h); | |
85 | |
86 size_t used_in_bytes() { | |
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87 return _g1mm->survivor_space_used(); |
1089 | 88 } |
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89 size_t max_size() const { |
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90 return _undefined_max; |
1089 | 91 } |
92 MemoryUsage get_memory_usage(); | |
93 }; | |
94 | |
95 // Memory pool that represents the G1 old gen. | |
96 class G1OldGenPool : public G1MemoryPoolSuper { | |
97 public: | |
98 G1OldGenPool(G1CollectedHeap* g1h); | |
99 | |
100 size_t used_in_bytes() { | |
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101 return _g1mm->old_space_used(); |
1089 | 102 } |
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103 size_t max_size() const { |
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104 return _g1mm->old_gen_max(); |
1089 | 105 } |
106 MemoryUsage get_memory_usage(); | |
107 }; | |
1972 | 108 |
109 #endif // SHARE_VM_SERVICES_G1MEMORYPOOL_HPP |