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annotate src/share/vm/services/memoryManager.hpp @ 3109:3664989976e2
Merge
author | Gilles Duboscq <gilles.duboscq@oracle.com> |
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date | Fri, 01 Jul 2011 12:57:10 +0200 |
parents | f95d63e2154a |
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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. | |
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_MEMORYMANAGER_HPP |
26 #define SHARE_VM_SERVICES_MEMORYMANAGER_HPP | |
27 | |
28 #include "memory/allocation.hpp" | |
29 #include "runtime/timer.hpp" | |
30 #include "services/memoryUsage.hpp" | |
31 | |
0 | 32 // A memory manager is responsible for managing one or more memory pools. |
33 // The garbage collector is one type of memory managers responsible | |
34 // for reclaiming memory occupied by unreachable objects. A Java virtual | |
35 // machine may have one or more memory managers. It may | |
36 // add or remove memory managers during execution. | |
37 // A memory pool can be managed by more than one memory managers. | |
38 | |
39 class MemoryPool; | |
40 class GCMemoryManager; | |
41 class OopClosure; | |
42 | |
43 class MemoryManager : public CHeapObj { | |
44 private: | |
45 enum { | |
46 max_num_pools = 10 | |
47 }; | |
48 | |
49 MemoryPool* _pools[max_num_pools]; | |
50 int _num_pools; | |
51 | |
52 protected: | |
53 volatile instanceOop _memory_mgr_obj; | |
54 | |
55 public: | |
56 enum Name { | |
57 Abstract, | |
58 CodeCache, | |
59 Copy, | |
60 MarkSweepCompact, | |
61 ParNew, | |
62 ConcurrentMarkSweep, | |
63 PSScavenge, | |
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64 PSMarkSweep, |
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65 G1YoungGen, |
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66 G1OldGen |
0 | 67 }; |
68 | |
69 MemoryManager(); | |
70 | |
71 int num_memory_pools() const { return _num_pools; } | |
72 MemoryPool* get_memory_pool(int index) { | |
73 assert(index >= 0 && index < _num_pools, "Invalid index"); | |
74 return _pools[index]; | |
75 } | |
76 | |
77 void add_pool(MemoryPool* pool); | |
78 | |
79 bool is_manager(instanceHandle mh) { return mh() == _memory_mgr_obj; } | |
80 | |
81 virtual instanceOop get_memory_manager_instance(TRAPS); | |
82 virtual MemoryManager::Name kind() { return MemoryManager::Abstract; } | |
83 virtual bool is_gc_memory_manager() { return false; } | |
84 virtual const char* name() = 0; | |
85 | |
86 // GC support | |
87 void oops_do(OopClosure* f); | |
88 | |
89 // Static factory methods to get a memory manager of a specific type | |
90 static MemoryManager* get_code_cache_memory_manager(); | |
91 static GCMemoryManager* get_copy_memory_manager(); | |
92 static GCMemoryManager* get_msc_memory_manager(); | |
93 static GCMemoryManager* get_parnew_memory_manager(); | |
94 static GCMemoryManager* get_cms_memory_manager(); | |
95 static GCMemoryManager* get_psScavenge_memory_manager(); | |
96 static GCMemoryManager* get_psMarkSweep_memory_manager(); | |
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97 static GCMemoryManager* get_g1YoungGen_memory_manager(); |
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98 static GCMemoryManager* get_g1OldGen_memory_manager(); |
0 | 99 |
100 }; | |
101 | |
102 class CodeCacheMemoryManager : public MemoryManager { | |
103 private: | |
104 public: | |
105 CodeCacheMemoryManager() : MemoryManager() {} | |
106 | |
107 MemoryManager::Name kind() { return MemoryManager::CodeCache; } | |
108 const char* name() { return "CodeCacheManager"; } | |
109 }; | |
110 | |
111 class GCStatInfo : public CHeapObj { | |
112 private: | |
113 size_t _index; | |
114 jlong _start_time; | |
115 jlong _end_time; | |
116 | |
117 // We keep memory usage of all memory pools | |
118 MemoryUsage* _before_gc_usage_array; | |
119 MemoryUsage* _after_gc_usage_array; | |
120 int _usage_array_size; | |
121 | |
122 void set_gc_usage(int pool_index, MemoryUsage, bool before_gc); | |
123 | |
124 public: | |
125 GCStatInfo(int num_pools); | |
126 ~GCStatInfo(); | |
127 | |
128 size_t gc_index() { return _index; } | |
129 jlong start_time() { return _start_time; } | |
130 jlong end_time() { return _end_time; } | |
131 int usage_array_size() { return _usage_array_size; } | |
132 MemoryUsage before_gc_usage_for_pool(int pool_index) { | |
133 assert(pool_index >= 0 && pool_index < _usage_array_size, "Range checking"); | |
134 return _before_gc_usage_array[pool_index]; | |
135 } | |
136 MemoryUsage after_gc_usage_for_pool(int pool_index) { | |
137 assert(pool_index >= 0 && pool_index < _usage_array_size, "Range checking"); | |
138 return _after_gc_usage_array[pool_index]; | |
139 } | |
140 | |
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141 MemoryUsage* before_gc_usage_array() { return _before_gc_usage_array; } |
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142 MemoryUsage* after_gc_usage_array() { return _after_gc_usage_array; } |
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143 |
0 | 144 void set_index(size_t index) { _index = index; } |
145 void set_start_time(jlong time) { _start_time = time; } | |
146 void set_end_time(jlong time) { _end_time = time; } | |
147 void set_before_gc_usage(int pool_index, MemoryUsage usage) { | |
148 assert(pool_index >= 0 && pool_index < _usage_array_size, "Range checking"); | |
149 set_gc_usage(pool_index, usage, true /* before gc */); | |
150 } | |
151 void set_after_gc_usage(int pool_index, MemoryUsage usage) { | |
152 assert(pool_index >= 0 && pool_index < _usage_array_size, "Range checking"); | |
153 set_gc_usage(pool_index, usage, false /* after gc */); | |
154 } | |
155 | |
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156 void clear(); |
0 | 157 }; |
158 | |
159 class GCMemoryManager : public MemoryManager { | |
160 private: | |
161 // TODO: We should unify the GCCounter and GCMemoryManager statistic | |
162 size_t _num_collections; | |
163 elapsedTimer _accumulated_timer; | |
164 elapsedTimer _gc_timer; // for measuring every GC duration | |
165 GCStatInfo* _last_gc_stat; | |
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166 Mutex* _last_gc_lock; |
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167 GCStatInfo* _current_gc_stat; |
0 | 168 int _num_gc_threads; |
169 public: | |
170 GCMemoryManager(); | |
171 ~GCMemoryManager(); | |
172 | |
173 void initialize_gc_stat_info(); | |
174 | |
175 bool is_gc_memory_manager() { return true; } | |
176 jlong gc_time_ms() { return _accumulated_timer.milliseconds(); } | |
177 size_t gc_count() { return _num_collections; } | |
178 int num_gc_threads() { return _num_gc_threads; } | |
179 void set_num_gc_threads(int count) { _num_gc_threads = count; } | |
180 | |
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181 void gc_begin(bool recordGCBeginTime, bool recordPreGCUsage, |
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182 bool recordAccumulatedGCTime); |
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183 void gc_end(bool recordPostGCUsage, bool recordAccumulatedGCTime, |
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184 bool recordGCEndTime, bool countCollection); |
0 | 185 |
186 void reset_gc_stat() { _num_collections = 0; _accumulated_timer.reset(); } | |
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187 |
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188 // Copy out _last_gc_stat to the given destination, returning |
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189 // the collection count. Zero signifies no gc has taken place. |
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190 size_t get_last_gc_stat(GCStatInfo* dest); |
0 | 191 |
192 virtual MemoryManager::Name kind() = 0; | |
193 }; | |
194 | |
195 // These subclasses of GCMemoryManager are defined to include | |
196 // GC-specific information. | |
197 // TODO: Add GC-specific information | |
198 class CopyMemoryManager : public GCMemoryManager { | |
199 private: | |
200 public: | |
201 CopyMemoryManager() : GCMemoryManager() {} | |
202 | |
203 MemoryManager::Name kind() { return MemoryManager::Copy; } | |
204 const char* name() { return "Copy"; } | |
205 }; | |
206 | |
207 class MSCMemoryManager : public GCMemoryManager { | |
208 private: | |
209 public: | |
210 MSCMemoryManager() : GCMemoryManager() {} | |
211 | |
212 MemoryManager::Name kind() { return MemoryManager::MarkSweepCompact; } | |
213 const char* name() { return "MarkSweepCompact"; } | |
214 | |
215 }; | |
216 | |
217 class ParNewMemoryManager : public GCMemoryManager { | |
218 private: | |
219 public: | |
220 ParNewMemoryManager() : GCMemoryManager() {} | |
221 | |
222 MemoryManager::Name kind() { return MemoryManager::ParNew; } | |
223 const char* name() { return "ParNew"; } | |
224 | |
225 }; | |
226 | |
227 class CMSMemoryManager : public GCMemoryManager { | |
228 private: | |
229 public: | |
230 CMSMemoryManager() : GCMemoryManager() {} | |
231 | |
232 MemoryManager::Name kind() { return MemoryManager::ConcurrentMarkSweep; } | |
233 const char* name() { return "ConcurrentMarkSweep";} | |
234 | |
235 }; | |
236 | |
237 class PSScavengeMemoryManager : public GCMemoryManager { | |
238 private: | |
239 public: | |
240 PSScavengeMemoryManager() : GCMemoryManager() {} | |
241 | |
242 MemoryManager::Name kind() { return MemoryManager::PSScavenge; } | |
243 const char* name() { return "PS Scavenge"; } | |
244 | |
245 }; | |
246 | |
247 class PSMarkSweepMemoryManager : public GCMemoryManager { | |
248 private: | |
249 public: | |
250 PSMarkSweepMemoryManager() : GCMemoryManager() {} | |
251 | |
252 MemoryManager::Name kind() { return MemoryManager::PSMarkSweep; } | |
253 const char* name() { return "PS MarkSweep"; } | |
254 }; | |
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255 |
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256 class G1YoungGenMemoryManager : public GCMemoryManager { |
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257 private: |
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258 public: |
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259 G1YoungGenMemoryManager() : GCMemoryManager() {} |
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260 |
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261 MemoryManager::Name kind() { return MemoryManager::G1YoungGen; } |
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262 const char* name() { return "G1 Young Generation"; } |
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263 }; |
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264 |
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265 class G1OldGenMemoryManager : public GCMemoryManager { |
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266 private: |
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267 public: |
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268 G1OldGenMemoryManager() : GCMemoryManager() {} |
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269 |
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270 MemoryManager::Name kind() { return MemoryManager::G1OldGen; } |
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271 const char* name() { return "G1 Old Generation"; } |
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272 }; |
1972 | 273 |
274 #endif // SHARE_VM_SERVICES_MEMORYMANAGER_HPP |