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annotate src/share/vm/services/memoryPool.hpp @ 17565:27be1cc8329c
Added tag jdk8u11-b00 for changeset b90de55aca30
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date | Wed, 12 Feb 2014 11:13:16 -0800 |
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0 | 1 /* |
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2 * Copyright (c) 2003, 2013, 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_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" | |
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33 #include "utilities/macros.hpp" |
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34 #if INCLUDE_ALL_GCS |
1972 | 35 #include "gc_implementation/concurrentMarkSweep/compactibleFreeListSpace.hpp" |
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36 #endif // INCLUDE_ALL_GCS |
1972 | 37 |
0 | 38 // A memory pool represents the memory area that the VM manages. |
39 // The Java virtual machine has at least one memory pool | |
40 // and it may create or remove memory pools during execution. | |
41 // A memory pool can belong to the heap or the non-heap memory. | |
42 // A Java virtual machine may also have memory pools belonging to | |
43 // both heap and non-heap memory. | |
44 | |
45 // Forward declaration | |
46 class MemoryManager; | |
47 class SensorInfo; | |
48 class Generation; | |
49 class DefNewGeneration; | |
50 class ThresholdSupport; | |
51 | |
6197 | 52 class MemoryPool : public CHeapObj<mtInternal> { |
0 | 53 friend class MemoryManager; |
54 public: | |
55 enum PoolType { | |
56 Heap = 1, | |
57 NonHeap = 2 | |
58 }; | |
59 | |
60 private: | |
61 enum { | |
62 max_num_managers = 5 | |
63 }; | |
64 | |
65 // We could make some of the following as performance counters | |
66 // for external monitoring. | |
67 const char* _name; | |
68 PoolType _type; | |
69 size_t _initial_size; | |
70 size_t _max_size; | |
71 bool _available_for_allocation; // Default is true | |
72 MemoryManager* _managers[max_num_managers]; | |
73 int _num_managers; | |
74 MemoryUsage _peak_usage; // Peak memory usage | |
75 MemoryUsage _after_gc_usage; // After GC memory usage | |
76 | |
77 ThresholdSupport* _usage_threshold; | |
78 ThresholdSupport* _gc_usage_threshold; | |
79 | |
80 SensorInfo* _usage_sensor; | |
81 SensorInfo* _gc_usage_sensor; | |
82 | |
83 volatile instanceOop _memory_pool_obj; | |
84 | |
85 void add_manager(MemoryManager* mgr); | |
86 | |
87 public: | |
88 MemoryPool(const char* name, | |
89 PoolType type, | |
90 size_t init_size, | |
91 size_t max_size, | |
92 bool support_usage_threshold, | |
93 bool support_gc_threshold); | |
94 | |
95 const char* name() { return _name; } | |
96 bool is_heap() { return _type == Heap; } | |
97 bool is_non_heap() { return _type == NonHeap; } | |
98 size_t initial_size() const { return _initial_size; } | |
99 int num_memory_managers() const { return _num_managers; } | |
100 // max size could be changed | |
101 virtual size_t max_size() const { return _max_size; } | |
102 | |
103 bool is_pool(instanceHandle pool) { return (pool() == _memory_pool_obj); } | |
104 | |
105 bool available_for_allocation() { return _available_for_allocation; } | |
106 bool set_available_for_allocation(bool value) { | |
107 bool prev = _available_for_allocation; | |
108 _available_for_allocation = value; | |
109 return prev; | |
110 } | |
111 | |
112 MemoryManager* get_memory_manager(int index) { | |
113 assert(index >= 0 && index < _num_managers, "Invalid index"); | |
114 return _managers[index]; | |
115 } | |
116 | |
117 // Records current memory usage if it's a peak usage | |
118 void record_peak_memory_usage(); | |
119 | |
120 MemoryUsage get_peak_memory_usage() { | |
121 // check current memory usage first and then return peak usage | |
122 record_peak_memory_usage(); | |
123 return _peak_usage; | |
124 } | |
125 void reset_peak_memory_usage() { | |
126 _peak_usage = get_memory_usage(); | |
127 } | |
128 | |
129 ThresholdSupport* usage_threshold() { return _usage_threshold; } | |
130 ThresholdSupport* gc_usage_threshold() { return _gc_usage_threshold; } | |
131 | |
132 SensorInfo* usage_sensor() { return _usage_sensor; } | |
133 SensorInfo* gc_usage_sensor() { return _gc_usage_sensor; } | |
134 | |
135 void set_usage_sensor_obj(instanceHandle s); | |
136 void set_gc_usage_sensor_obj(instanceHandle s); | |
137 void set_last_collection_usage(MemoryUsage u) { _after_gc_usage = u; } | |
138 | |
139 virtual instanceOop get_memory_pool_instance(TRAPS); | |
140 virtual MemoryUsage get_memory_usage() = 0; | |
141 virtual size_t used_in_bytes() = 0; | |
142 virtual bool is_collected_pool() { return false; } | |
143 virtual MemoryUsage get_last_collection_usage() { return _after_gc_usage; } | |
144 | |
145 // GC support | |
146 void oops_do(OopClosure* f); | |
147 }; | |
148 | |
149 class CollectedMemoryPool : public MemoryPool { | |
150 public: | |
151 CollectedMemoryPool(const char* name, PoolType type, size_t init_size, size_t max_size, bool support_usage_threshold) : | |
152 MemoryPool(name, type, init_size, max_size, support_usage_threshold, true) {}; | |
153 bool is_collected_pool() { return true; } | |
154 }; | |
155 | |
156 class ContiguousSpacePool : public CollectedMemoryPool { | |
157 private: | |
158 ContiguousSpace* _space; | |
159 | |
160 public: | |
161 ContiguousSpacePool(ContiguousSpace* space, const char* name, PoolType type, size_t max_size, bool support_usage_threshold); | |
162 | |
163 ContiguousSpace* space() { return _space; } | |
164 MemoryUsage get_memory_usage(); | |
165 size_t used_in_bytes() { return space()->used(); } | |
166 }; | |
167 | |
168 class SurvivorContiguousSpacePool : public CollectedMemoryPool { | |
169 private: | |
170 DefNewGeneration* _gen; | |
171 | |
172 public: | |
173 SurvivorContiguousSpacePool(DefNewGeneration* gen, | |
174 const char* name, | |
175 PoolType type, | |
176 size_t max_size, | |
177 bool support_usage_threshold); | |
178 | |
179 MemoryUsage get_memory_usage(); | |
180 | |
181 size_t used_in_bytes() { | |
182 return _gen->from()->used(); | |
183 } | |
184 size_t committed_in_bytes() { | |
185 return _gen->from()->capacity(); | |
186 } | |
187 }; | |
188 | |
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189 #if INCLUDE_ALL_GCS |
0 | 190 class CompactibleFreeListSpacePool : public CollectedMemoryPool { |
191 private: | |
192 CompactibleFreeListSpace* _space; | |
193 public: | |
194 CompactibleFreeListSpacePool(CompactibleFreeListSpace* space, | |
195 const char* name, | |
196 PoolType type, | |
197 size_t max_size, | |
198 bool support_usage_threshold); | |
199 | |
200 MemoryUsage get_memory_usage(); | |
201 size_t used_in_bytes() { return _space->used(); } | |
202 }; | |
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203 #endif // INCLUDE_ALL_GCS |
0 | 204 |
205 | |
206 class GenerationPool : public CollectedMemoryPool { | |
207 private: | |
208 Generation* _gen; | |
209 public: | |
210 GenerationPool(Generation* gen, const char* name, PoolType type, bool support_usage_threshold); | |
211 | |
212 MemoryUsage get_memory_usage(); | |
213 size_t used_in_bytes() { return _gen->used(); } | |
214 }; | |
215 | |
216 class CodeHeapPool: public MemoryPool { | |
217 private: | |
218 CodeHeap* _codeHeap; | |
219 public: | |
220 CodeHeapPool(CodeHeap* codeHeap, const char* name, bool support_usage_threshold); | |
221 MemoryUsage get_memory_usage(); | |
222 size_t used_in_bytes() { return _codeHeap->allocated_capacity(); } | |
223 }; | |
1972 | 224 |
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225 class MetaspacePool : public MemoryPool { |
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226 size_t calculate_max_size() const; |
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227 public: |
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228 MetaspacePool(); |
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229 MemoryUsage get_memory_usage(); |
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230 size_t used_in_bytes(); |
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231 }; |
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232 |
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233 class CompressedKlassSpacePool : public MemoryPool { |
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234 public: |
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235 CompressedKlassSpacePool(); |
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236 MemoryUsage get_memory_usage(); |
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237 size_t used_in_bytes(); |
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238 }; |
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239 |
1972 | 240 #endif // SHARE_VM_SERVICES_MEMORYPOOL_HPP |