Mercurial > hg > truffle
comparison src/share/vm/services/memoryManager.hpp @ 0:a61af66fc99e jdk7-b24
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author | duke |
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date | Sat, 01 Dec 2007 00:00:00 +0000 |
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children | db0d5eba9d20 |
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1 /* | |
2 * Copyright 2003-2005 Sun Microsystems, Inc. All Rights Reserved. | |
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 * | |
19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, | |
20 * CA 95054 USA or visit www.sun.com if you need additional information or | |
21 * have any questions. | |
22 * | |
23 */ | |
24 | |
25 // A memory manager is responsible for managing one or more memory pools. | |
26 // The garbage collector is one type of memory managers responsible | |
27 // for reclaiming memory occupied by unreachable objects. A Java virtual | |
28 // machine may have one or more memory managers. It may | |
29 // add or remove memory managers during execution. | |
30 // A memory pool can be managed by more than one memory managers. | |
31 | |
32 class MemoryPool; | |
33 class GCMemoryManager; | |
34 class OopClosure; | |
35 | |
36 class MemoryManager : public CHeapObj { | |
37 private: | |
38 enum { | |
39 max_num_pools = 10 | |
40 }; | |
41 | |
42 MemoryPool* _pools[max_num_pools]; | |
43 int _num_pools; | |
44 | |
45 protected: | |
46 volatile instanceOop _memory_mgr_obj; | |
47 | |
48 public: | |
49 enum Name { | |
50 Abstract, | |
51 CodeCache, | |
52 Copy, | |
53 MarkSweepCompact, | |
54 ParNew, | |
55 ConcurrentMarkSweep, | |
56 PSScavenge, | |
57 PSMarkSweep | |
58 }; | |
59 | |
60 MemoryManager(); | |
61 | |
62 int num_memory_pools() const { return _num_pools; } | |
63 MemoryPool* get_memory_pool(int index) { | |
64 assert(index >= 0 && index < _num_pools, "Invalid index"); | |
65 return _pools[index]; | |
66 } | |
67 | |
68 void add_pool(MemoryPool* pool); | |
69 | |
70 bool is_manager(instanceHandle mh) { return mh() == _memory_mgr_obj; } | |
71 | |
72 virtual instanceOop get_memory_manager_instance(TRAPS); | |
73 virtual MemoryManager::Name kind() { return MemoryManager::Abstract; } | |
74 virtual bool is_gc_memory_manager() { return false; } | |
75 virtual const char* name() = 0; | |
76 | |
77 // GC support | |
78 void oops_do(OopClosure* f); | |
79 | |
80 // Static factory methods to get a memory manager of a specific type | |
81 static MemoryManager* get_code_cache_memory_manager(); | |
82 static GCMemoryManager* get_copy_memory_manager(); | |
83 static GCMemoryManager* get_msc_memory_manager(); | |
84 static GCMemoryManager* get_parnew_memory_manager(); | |
85 static GCMemoryManager* get_cms_memory_manager(); | |
86 static GCMemoryManager* get_psScavenge_memory_manager(); | |
87 static GCMemoryManager* get_psMarkSweep_memory_manager(); | |
88 | |
89 }; | |
90 | |
91 class CodeCacheMemoryManager : public MemoryManager { | |
92 private: | |
93 public: | |
94 CodeCacheMemoryManager() : MemoryManager() {} | |
95 | |
96 MemoryManager::Name kind() { return MemoryManager::CodeCache; } | |
97 const char* name() { return "CodeCacheManager"; } | |
98 }; | |
99 | |
100 class GCStatInfo : public CHeapObj { | |
101 private: | |
102 size_t _index; | |
103 jlong _start_time; | |
104 jlong _end_time; | |
105 | |
106 // We keep memory usage of all memory pools | |
107 MemoryUsage* _before_gc_usage_array; | |
108 MemoryUsage* _after_gc_usage_array; | |
109 int _usage_array_size; | |
110 | |
111 void set_gc_usage(int pool_index, MemoryUsage, bool before_gc); | |
112 | |
113 public: | |
114 GCStatInfo(int num_pools); | |
115 ~GCStatInfo(); | |
116 | |
117 size_t gc_index() { return _index; } | |
118 jlong start_time() { return _start_time; } | |
119 jlong end_time() { return _end_time; } | |
120 int usage_array_size() { return _usage_array_size; } | |
121 MemoryUsage before_gc_usage_for_pool(int pool_index) { | |
122 assert(pool_index >= 0 && pool_index < _usage_array_size, "Range checking"); | |
123 return _before_gc_usage_array[pool_index]; | |
124 } | |
125 MemoryUsage after_gc_usage_for_pool(int pool_index) { | |
126 assert(pool_index >= 0 && pool_index < _usage_array_size, "Range checking"); | |
127 return _after_gc_usage_array[pool_index]; | |
128 } | |
129 | |
130 void set_index(size_t index) { _index = index; } | |
131 void set_start_time(jlong time) { _start_time = time; } | |
132 void set_end_time(jlong time) { _end_time = time; } | |
133 void set_before_gc_usage(int pool_index, MemoryUsage usage) { | |
134 assert(pool_index >= 0 && pool_index < _usage_array_size, "Range checking"); | |
135 set_gc_usage(pool_index, usage, true /* before gc */); | |
136 } | |
137 void set_after_gc_usage(int pool_index, MemoryUsage usage) { | |
138 assert(pool_index >= 0 && pool_index < _usage_array_size, "Range checking"); | |
139 set_gc_usage(pool_index, usage, false /* after gc */); | |
140 } | |
141 | |
142 void copy_stat(GCStatInfo* stat); | |
143 }; | |
144 | |
145 class GCMemoryManager : public MemoryManager { | |
146 private: | |
147 // TODO: We should unify the GCCounter and GCMemoryManager statistic | |
148 size_t _num_collections; | |
149 elapsedTimer _accumulated_timer; | |
150 elapsedTimer _gc_timer; // for measuring every GC duration | |
151 GCStatInfo* _last_gc_stat; | |
152 int _num_gc_threads; | |
153 public: | |
154 GCMemoryManager(); | |
155 ~GCMemoryManager(); | |
156 | |
157 void initialize_gc_stat_info(); | |
158 | |
159 bool is_gc_memory_manager() { return true; } | |
160 jlong gc_time_ms() { return _accumulated_timer.milliseconds(); } | |
161 size_t gc_count() { return _num_collections; } | |
162 int num_gc_threads() { return _num_gc_threads; } | |
163 void set_num_gc_threads(int count) { _num_gc_threads = count; } | |
164 | |
165 void gc_begin(); | |
166 void gc_end(); | |
167 | |
168 void reset_gc_stat() { _num_collections = 0; _accumulated_timer.reset(); } | |
169 GCStatInfo* last_gc_stat() { return _last_gc_stat; } | |
170 | |
171 virtual MemoryManager::Name kind() = 0; | |
172 }; | |
173 | |
174 // These subclasses of GCMemoryManager are defined to include | |
175 // GC-specific information. | |
176 // TODO: Add GC-specific information | |
177 class CopyMemoryManager : public GCMemoryManager { | |
178 private: | |
179 public: | |
180 CopyMemoryManager() : GCMemoryManager() {} | |
181 | |
182 MemoryManager::Name kind() { return MemoryManager::Copy; } | |
183 const char* name() { return "Copy"; } | |
184 }; | |
185 | |
186 class MSCMemoryManager : public GCMemoryManager { | |
187 private: | |
188 public: | |
189 MSCMemoryManager() : GCMemoryManager() {} | |
190 | |
191 MemoryManager::Name kind() { return MemoryManager::MarkSweepCompact; } | |
192 const char* name() { return "MarkSweepCompact"; } | |
193 | |
194 }; | |
195 | |
196 class ParNewMemoryManager : public GCMemoryManager { | |
197 private: | |
198 public: | |
199 ParNewMemoryManager() : GCMemoryManager() {} | |
200 | |
201 MemoryManager::Name kind() { return MemoryManager::ParNew; } | |
202 const char* name() { return "ParNew"; } | |
203 | |
204 }; | |
205 | |
206 class CMSMemoryManager : public GCMemoryManager { | |
207 private: | |
208 public: | |
209 CMSMemoryManager() : GCMemoryManager() {} | |
210 | |
211 MemoryManager::Name kind() { return MemoryManager::ConcurrentMarkSweep; } | |
212 const char* name() { return "ConcurrentMarkSweep";} | |
213 | |
214 }; | |
215 | |
216 class PSScavengeMemoryManager : public GCMemoryManager { | |
217 private: | |
218 public: | |
219 PSScavengeMemoryManager() : GCMemoryManager() {} | |
220 | |
221 MemoryManager::Name kind() { return MemoryManager::PSScavenge; } | |
222 const char* name() { return "PS Scavenge"; } | |
223 | |
224 }; | |
225 | |
226 class PSMarkSweepMemoryManager : public GCMemoryManager { | |
227 private: | |
228 public: | |
229 PSMarkSweepMemoryManager() : GCMemoryManager() {} | |
230 | |
231 MemoryManager::Name kind() { return MemoryManager::PSMarkSweep; } | |
232 const char* name() { return "PS MarkSweep"; } | |
233 }; |