Mercurial > hg > truffle
annotate src/share/vm/services/memoryManager.hpp @ 1703:f6f3eef8a521
6581734: CMS Old Gen's collection usage is zero after GC which is incorrect
Summary: Management code enabled for use by a concurrent collector.
Reviewed-by: mchung, ysr
| author | kevinw |
|---|---|
| date | Fri, 30 Jul 2010 22:43:50 +0100 |
| parents | c18cbe5936b8 |
| children | f95d63e2154a |
| rev | line source |
|---|---|
| 0 | 1 /* |
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2 * Copyright (c) 2003, 2005, 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 | |
| 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, | |
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57 PSMarkSweep, |
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58 G1YoungGen, |
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59 G1OldGen |
| 0 | 60 }; |
| 61 | |
| 62 MemoryManager(); | |
| 63 | |
| 64 int num_memory_pools() const { return _num_pools; } | |
| 65 MemoryPool* get_memory_pool(int index) { | |
| 66 assert(index >= 0 && index < _num_pools, "Invalid index"); | |
| 67 return _pools[index]; | |
| 68 } | |
| 69 | |
| 70 void add_pool(MemoryPool* pool); | |
| 71 | |
| 72 bool is_manager(instanceHandle mh) { return mh() == _memory_mgr_obj; } | |
| 73 | |
| 74 virtual instanceOop get_memory_manager_instance(TRAPS); | |
| 75 virtual MemoryManager::Name kind() { return MemoryManager::Abstract; } | |
| 76 virtual bool is_gc_memory_manager() { return false; } | |
| 77 virtual const char* name() = 0; | |
| 78 | |
| 79 // GC support | |
| 80 void oops_do(OopClosure* f); | |
| 81 | |
| 82 // Static factory methods to get a memory manager of a specific type | |
| 83 static MemoryManager* get_code_cache_memory_manager(); | |
| 84 static GCMemoryManager* get_copy_memory_manager(); | |
| 85 static GCMemoryManager* get_msc_memory_manager(); | |
| 86 static GCMemoryManager* get_parnew_memory_manager(); | |
| 87 static GCMemoryManager* get_cms_memory_manager(); | |
| 88 static GCMemoryManager* get_psScavenge_memory_manager(); | |
| 89 static GCMemoryManager* get_psMarkSweep_memory_manager(); | |
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90 static GCMemoryManager* get_g1YoungGen_memory_manager(); |
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91 static GCMemoryManager* get_g1OldGen_memory_manager(); |
| 0 | 92 |
| 93 }; | |
| 94 | |
| 95 class CodeCacheMemoryManager : public MemoryManager { | |
| 96 private: | |
| 97 public: | |
| 98 CodeCacheMemoryManager() : MemoryManager() {} | |
| 99 | |
| 100 MemoryManager::Name kind() { return MemoryManager::CodeCache; } | |
| 101 const char* name() { return "CodeCacheManager"; } | |
| 102 }; | |
| 103 | |
| 104 class GCStatInfo : public CHeapObj { | |
| 105 private: | |
| 106 size_t _index; | |
| 107 jlong _start_time; | |
| 108 jlong _end_time; | |
| 109 | |
| 110 // We keep memory usage of all memory pools | |
| 111 MemoryUsage* _before_gc_usage_array; | |
| 112 MemoryUsage* _after_gc_usage_array; | |
| 113 int _usage_array_size; | |
| 114 | |
| 115 void set_gc_usage(int pool_index, MemoryUsage, bool before_gc); | |
| 116 | |
| 117 public: | |
| 118 GCStatInfo(int num_pools); | |
| 119 ~GCStatInfo(); | |
| 120 | |
| 121 size_t gc_index() { return _index; } | |
| 122 jlong start_time() { return _start_time; } | |
| 123 jlong end_time() { return _end_time; } | |
| 124 int usage_array_size() { return _usage_array_size; } | |
| 125 MemoryUsage before_gc_usage_for_pool(int pool_index) { | |
| 126 assert(pool_index >= 0 && pool_index < _usage_array_size, "Range checking"); | |
| 127 return _before_gc_usage_array[pool_index]; | |
| 128 } | |
| 129 MemoryUsage after_gc_usage_for_pool(int pool_index) { | |
| 130 assert(pool_index >= 0 && pool_index < _usage_array_size, "Range checking"); | |
| 131 return _after_gc_usage_array[pool_index]; | |
| 132 } | |
| 133 | |
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134 MemoryUsage* before_gc_usage_array() { return _before_gc_usage_array; } |
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135 MemoryUsage* after_gc_usage_array() { return _after_gc_usage_array; } |
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136 |
| 0 | 137 void set_index(size_t index) { _index = index; } |
| 138 void set_start_time(jlong time) { _start_time = time; } | |
| 139 void set_end_time(jlong time) { _end_time = time; } | |
| 140 void set_before_gc_usage(int pool_index, MemoryUsage usage) { | |
| 141 assert(pool_index >= 0 && pool_index < _usage_array_size, "Range checking"); | |
| 142 set_gc_usage(pool_index, usage, true /* before gc */); | |
| 143 } | |
| 144 void set_after_gc_usage(int pool_index, MemoryUsage usage) { | |
| 145 assert(pool_index >= 0 && pool_index < _usage_array_size, "Range checking"); | |
| 146 set_gc_usage(pool_index, usage, false /* after gc */); | |
| 147 } | |
| 148 | |
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149 void clear(); |
| 0 | 150 }; |
| 151 | |
| 152 class GCMemoryManager : public MemoryManager { | |
| 153 private: | |
| 154 // TODO: We should unify the GCCounter and GCMemoryManager statistic | |
| 155 size_t _num_collections; | |
| 156 elapsedTimer _accumulated_timer; | |
| 157 elapsedTimer _gc_timer; // for measuring every GC duration | |
| 158 GCStatInfo* _last_gc_stat; | |
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159 Mutex* _last_gc_lock; |
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160 GCStatInfo* _current_gc_stat; |
| 0 | 161 int _num_gc_threads; |
| 162 public: | |
| 163 GCMemoryManager(); | |
| 164 ~GCMemoryManager(); | |
| 165 | |
| 166 void initialize_gc_stat_info(); | |
| 167 | |
| 168 bool is_gc_memory_manager() { return true; } | |
| 169 jlong gc_time_ms() { return _accumulated_timer.milliseconds(); } | |
| 170 size_t gc_count() { return _num_collections; } | |
| 171 int num_gc_threads() { return _num_gc_threads; } | |
| 172 void set_num_gc_threads(int count) { _num_gc_threads = count; } | |
| 173 | |
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174 void gc_begin(bool recordGCBeginTime, bool recordPreGCUsage, |
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175 bool recordAccumulatedGCTime); |
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176 void gc_end(bool recordPostGCUsage, bool recordAccumulatedGCTime, |
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177 bool recordGCEndTime, bool countCollection); |
| 0 | 178 |
| 179 void reset_gc_stat() { _num_collections = 0; _accumulated_timer.reset(); } | |
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180 |
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181 // Copy out _last_gc_stat to the given destination, returning |
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182 // the collection count. Zero signifies no gc has taken place. |
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183 size_t get_last_gc_stat(GCStatInfo* dest); |
| 0 | 184 |
| 185 virtual MemoryManager::Name kind() = 0; | |
| 186 }; | |
| 187 | |
| 188 // These subclasses of GCMemoryManager are defined to include | |
| 189 // GC-specific information. | |
| 190 // TODO: Add GC-specific information | |
| 191 class CopyMemoryManager : public GCMemoryManager { | |
| 192 private: | |
| 193 public: | |
| 194 CopyMemoryManager() : GCMemoryManager() {} | |
| 195 | |
| 196 MemoryManager::Name kind() { return MemoryManager::Copy; } | |
| 197 const char* name() { return "Copy"; } | |
| 198 }; | |
| 199 | |
| 200 class MSCMemoryManager : public GCMemoryManager { | |
| 201 private: | |
| 202 public: | |
| 203 MSCMemoryManager() : GCMemoryManager() {} | |
| 204 | |
| 205 MemoryManager::Name kind() { return MemoryManager::MarkSweepCompact; } | |
| 206 const char* name() { return "MarkSweepCompact"; } | |
| 207 | |
| 208 }; | |
| 209 | |
| 210 class ParNewMemoryManager : public GCMemoryManager { | |
| 211 private: | |
| 212 public: | |
| 213 ParNewMemoryManager() : GCMemoryManager() {} | |
| 214 | |
| 215 MemoryManager::Name kind() { return MemoryManager::ParNew; } | |
| 216 const char* name() { return "ParNew"; } | |
| 217 | |
| 218 }; | |
| 219 | |
| 220 class CMSMemoryManager : public GCMemoryManager { | |
| 221 private: | |
| 222 public: | |
| 223 CMSMemoryManager() : GCMemoryManager() {} | |
| 224 | |
| 225 MemoryManager::Name kind() { return MemoryManager::ConcurrentMarkSweep; } | |
| 226 const char* name() { return "ConcurrentMarkSweep";} | |
| 227 | |
| 228 }; | |
| 229 | |
| 230 class PSScavengeMemoryManager : public GCMemoryManager { | |
| 231 private: | |
| 232 public: | |
| 233 PSScavengeMemoryManager() : GCMemoryManager() {} | |
| 234 | |
| 235 MemoryManager::Name kind() { return MemoryManager::PSScavenge; } | |
| 236 const char* name() { return "PS Scavenge"; } | |
| 237 | |
| 238 }; | |
| 239 | |
| 240 class PSMarkSweepMemoryManager : public GCMemoryManager { | |
| 241 private: | |
| 242 public: | |
| 243 PSMarkSweepMemoryManager() : GCMemoryManager() {} | |
| 244 | |
| 245 MemoryManager::Name kind() { return MemoryManager::PSMarkSweep; } | |
| 246 const char* name() { return "PS MarkSweep"; } | |
| 247 }; | |
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248 |
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249 class G1YoungGenMemoryManager : public GCMemoryManager { |
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250 private: |
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251 public: |
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252 G1YoungGenMemoryManager() : GCMemoryManager() {} |
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253 |
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254 MemoryManager::Name kind() { return MemoryManager::G1YoungGen; } |
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255 const char* name() { return "G1 Young Generation"; } |
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256 }; |
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257 |
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258 class G1OldGenMemoryManager : public GCMemoryManager { |
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259 private: |
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260 public: |
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261 G1OldGenMemoryManager() : GCMemoryManager() {} |
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262 |
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263 MemoryManager::Name kind() { return MemoryManager::G1OldGen; } |
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264 const char* name() { return "G1 Old Generation"; } |
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265 }; |