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annotate src/share/vm/services/memoryPool.hpp @ 3678:9482471a7dfa
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author | Peter Hofer <peter.hofer@jku.at> |
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date | Mon, 21 Nov 2011 15:54:32 +0100 |
parents | f95d63e2154a |
children | d2a62e0f25eb |
rev | line source |
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0 | 1 /* |
1972 | 2 * Copyright (c) 2003, 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. | |
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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_SERVICES_MEMORYPOOL_HPP |
26 #define SHARE_VM_SERVICES_MEMORYPOOL_HPP | |
27 | |
28 #include "gc_implementation/shared/mutableSpace.hpp" | |
29 #include "memory/defNewGeneration.hpp" | |
30 #include "memory/heap.hpp" | |
31 #include "memory/space.hpp" | |
32 #include "services/memoryUsage.hpp" | |
33 #ifndef SERIALGC | |
34 #include "gc_implementation/concurrentMarkSweep/compactibleFreeListSpace.hpp" | |
35 #endif | |
36 | |
0 | 37 // A memory pool represents the memory area that the VM manages. |
38 // The Java virtual machine has at least one memory pool | |
39 // and it may create or remove memory pools during execution. | |
40 // A memory pool can belong to the heap or the non-heap memory. | |
41 // A Java virtual machine may also have memory pools belonging to | |
42 // both heap and non-heap memory. | |
43 | |
44 // Forward declaration | |
45 class MemoryManager; | |
46 class SensorInfo; | |
47 class Generation; | |
48 class DefNewGeneration; | |
49 class PSPermGen; | |
50 class PermGen; | |
51 class ThresholdSupport; | |
52 | |
53 class MemoryPool : public CHeapObj { | |
54 friend class MemoryManager; | |
55 public: | |
56 enum PoolType { | |
57 Heap = 1, | |
58 NonHeap = 2 | |
59 }; | |
60 | |
61 private: | |
62 enum { | |
63 max_num_managers = 5 | |
64 }; | |
65 | |
66 // We could make some of the following as performance counters | |
67 // for external monitoring. | |
68 const char* _name; | |
69 PoolType _type; | |
70 size_t _initial_size; | |
71 size_t _max_size; | |
72 bool _available_for_allocation; // Default is true | |
73 MemoryManager* _managers[max_num_managers]; | |
74 int _num_managers; | |
75 MemoryUsage _peak_usage; // Peak memory usage | |
76 MemoryUsage _after_gc_usage; // After GC memory usage | |
77 | |
78 ThresholdSupport* _usage_threshold; | |
79 ThresholdSupport* _gc_usage_threshold; | |
80 | |
81 SensorInfo* _usage_sensor; | |
82 SensorInfo* _gc_usage_sensor; | |
83 | |
84 volatile instanceOop _memory_pool_obj; | |
85 | |
86 void add_manager(MemoryManager* mgr); | |
87 | |
88 public: | |
89 MemoryPool(const char* name, | |
90 PoolType type, | |
91 size_t init_size, | |
92 size_t max_size, | |
93 bool support_usage_threshold, | |
94 bool support_gc_threshold); | |
95 | |
96 const char* name() { return _name; } | |
97 bool is_heap() { return _type == Heap; } | |
98 bool is_non_heap() { return _type == NonHeap; } | |
99 size_t initial_size() const { return _initial_size; } | |
100 int num_memory_managers() const { return _num_managers; } | |
101 // max size could be changed | |
102 virtual size_t max_size() const { return _max_size; } | |
103 | |
104 bool is_pool(instanceHandle pool) { return (pool() == _memory_pool_obj); } | |
105 | |
106 bool available_for_allocation() { return _available_for_allocation; } | |
107 bool set_available_for_allocation(bool value) { | |
108 bool prev = _available_for_allocation; | |
109 _available_for_allocation = value; | |
110 return prev; | |
111 } | |
112 | |
113 MemoryManager* get_memory_manager(int index) { | |
114 assert(index >= 0 && index < _num_managers, "Invalid index"); | |
115 return _managers[index]; | |
116 } | |
117 | |
118 // Records current memory usage if it's a peak usage | |
119 void record_peak_memory_usage(); | |
120 | |
121 MemoryUsage get_peak_memory_usage() { | |
122 // check current memory usage first and then return peak usage | |
123 record_peak_memory_usage(); | |
124 return _peak_usage; | |
125 } | |
126 void reset_peak_memory_usage() { | |
127 _peak_usage = get_memory_usage(); | |
128 } | |
129 | |
130 ThresholdSupport* usage_threshold() { return _usage_threshold; } | |
131 ThresholdSupport* gc_usage_threshold() { return _gc_usage_threshold; } | |
132 | |
133 SensorInfo* usage_sensor() { return _usage_sensor; } | |
134 SensorInfo* gc_usage_sensor() { return _gc_usage_sensor; } | |
135 | |
136 void set_usage_sensor_obj(instanceHandle s); | |
137 void set_gc_usage_sensor_obj(instanceHandle s); | |
138 void set_last_collection_usage(MemoryUsage u) { _after_gc_usage = u; } | |
139 | |
140 virtual instanceOop get_memory_pool_instance(TRAPS); | |
141 virtual MemoryUsage get_memory_usage() = 0; | |
142 virtual size_t used_in_bytes() = 0; | |
143 virtual bool is_collected_pool() { return false; } | |
144 virtual MemoryUsage get_last_collection_usage() { return _after_gc_usage; } | |
145 | |
146 // GC support | |
147 void oops_do(OopClosure* f); | |
148 }; | |
149 | |
150 class CollectedMemoryPool : public MemoryPool { | |
151 public: | |
152 CollectedMemoryPool(const char* name, PoolType type, size_t init_size, size_t max_size, bool support_usage_threshold) : | |
153 MemoryPool(name, type, init_size, max_size, support_usage_threshold, true) {}; | |
154 bool is_collected_pool() { return true; } | |
155 }; | |
156 | |
157 class ContiguousSpacePool : public CollectedMemoryPool { | |
158 private: | |
159 ContiguousSpace* _space; | |
160 | |
161 public: | |
162 ContiguousSpacePool(ContiguousSpace* space, const char* name, PoolType type, size_t max_size, bool support_usage_threshold); | |
163 | |
164 ContiguousSpace* space() { return _space; } | |
165 MemoryUsage get_memory_usage(); | |
166 size_t used_in_bytes() { return space()->used(); } | |
167 }; | |
168 | |
169 class SurvivorContiguousSpacePool : public CollectedMemoryPool { | |
170 private: | |
171 DefNewGeneration* _gen; | |
172 | |
173 public: | |
174 SurvivorContiguousSpacePool(DefNewGeneration* gen, | |
175 const char* name, | |
176 PoolType type, | |
177 size_t max_size, | |
178 bool support_usage_threshold); | |
179 | |
180 MemoryUsage get_memory_usage(); | |
181 | |
182 size_t used_in_bytes() { | |
183 return _gen->from()->used(); | |
184 } | |
185 size_t committed_in_bytes() { | |
186 return _gen->from()->capacity(); | |
187 } | |
188 }; | |
189 | |
190 #ifndef SERIALGC | |
191 class CompactibleFreeListSpacePool : public CollectedMemoryPool { | |
192 private: | |
193 CompactibleFreeListSpace* _space; | |
194 public: | |
195 CompactibleFreeListSpacePool(CompactibleFreeListSpace* space, | |
196 const char* name, | |
197 PoolType type, | |
198 size_t max_size, | |
199 bool support_usage_threshold); | |
200 | |
201 MemoryUsage get_memory_usage(); | |
202 size_t used_in_bytes() { return _space->used(); } | |
203 }; | |
204 #endif // SERIALGC | |
205 | |
206 | |
207 class GenerationPool : public CollectedMemoryPool { | |
208 private: | |
209 Generation* _gen; | |
210 public: | |
211 GenerationPool(Generation* gen, const char* name, PoolType type, bool support_usage_threshold); | |
212 | |
213 MemoryUsage get_memory_usage(); | |
214 size_t used_in_bytes() { return _gen->used(); } | |
215 }; | |
216 | |
217 class CodeHeapPool: public MemoryPool { | |
218 private: | |
219 CodeHeap* _codeHeap; | |
220 public: | |
221 CodeHeapPool(CodeHeap* codeHeap, const char* name, bool support_usage_threshold); | |
222 MemoryUsage get_memory_usage(); | |
223 size_t used_in_bytes() { return _codeHeap->allocated_capacity(); } | |
224 }; | |
1972 | 225 |
226 #endif // SHARE_VM_SERVICES_MEMORYPOOL_HPP |