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annotate src/share/vm/services/memoryPool.cpp @ 1608:2389669474a6
Merge
author | jrose |
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date | Tue, 15 Jun 2010 15:57:36 -0700 |
parents | c18cbe5936b8 |
children | f95d63e2154a |
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0 | 1 /* |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
25 # include "incls/_precompiled.incl" | |
26 # include "incls/_memoryPool.cpp.incl" | |
27 | |
28 MemoryPool::MemoryPool(const char* name, | |
29 PoolType type, | |
30 size_t init_size, | |
31 size_t max_size, | |
32 bool support_usage_threshold, | |
33 bool support_gc_threshold) { | |
34 _name = name; | |
35 _initial_size = init_size; | |
36 _max_size = max_size; | |
37 _memory_pool_obj = NULL; | |
38 _available_for_allocation = true; | |
39 _num_managers = 0; | |
40 _type = type; | |
41 | |
42 // initialize the max and init size of collection usage | |
43 _after_gc_usage = MemoryUsage(_initial_size, 0, 0, _max_size); | |
44 | |
45 _usage_sensor = NULL; | |
46 _gc_usage_sensor = NULL; | |
47 // usage threshold supports both high and low threshold | |
48 _usage_threshold = new ThresholdSupport(support_usage_threshold, support_usage_threshold); | |
49 // gc usage threshold supports only high threshold | |
50 _gc_usage_threshold = new ThresholdSupport(support_gc_threshold, support_gc_threshold); | |
51 } | |
52 | |
53 void MemoryPool::add_manager(MemoryManager* mgr) { | |
54 assert(_num_managers < MemoryPool::max_num_managers, "_num_managers exceeds the max"); | |
55 if (_num_managers < MemoryPool::max_num_managers) { | |
56 _managers[_num_managers] = mgr; | |
57 _num_managers++; | |
58 } | |
59 } | |
60 | |
61 | |
62 // Returns an instanceHandle of a MemoryPool object. | |
63 // It creates a MemoryPool instance when the first time | |
64 // this function is called. | |
65 instanceOop MemoryPool::get_memory_pool_instance(TRAPS) { | |
66 // Must do an acquire so as to force ordering of subsequent | |
67 // loads from anything _memory_pool_obj points to or implies. | |
68 instanceOop pool_obj = (instanceOop)OrderAccess::load_ptr_acquire(&_memory_pool_obj); | |
69 if (pool_obj == NULL) { | |
70 // It's ok for more than one thread to execute the code up to the locked region. | |
71 // Extra pool instances will just be gc'ed. | |
72 klassOop k = Management::sun_management_ManagementFactory_klass(CHECK_NULL); | |
73 instanceKlassHandle ik(THREAD, k); | |
74 | |
75 Handle pool_name = java_lang_String::create_from_str(_name, CHECK_NULL); | |
76 jlong usage_threshold_value = (_usage_threshold->is_high_threshold_supported() ? 0 : -1L); | |
77 jlong gc_usage_threshold_value = (_gc_usage_threshold->is_high_threshold_supported() ? 0 : -1L); | |
78 | |
79 JavaValue result(T_OBJECT); | |
80 JavaCallArguments args; | |
81 args.push_oop(pool_name); // Argument 1 | |
82 args.push_int((int) is_heap()); // Argument 2 | |
83 | |
84 symbolHandle method_name = vmSymbolHandles::createMemoryPool_name(); | |
85 symbolHandle signature = vmSymbolHandles::createMemoryPool_signature(); | |
86 | |
87 args.push_long(usage_threshold_value); // Argument 3 | |
88 args.push_long(gc_usage_threshold_value); // Argument 4 | |
89 | |
90 JavaCalls::call_static(&result, | |
91 ik, | |
92 method_name, | |
93 signature, | |
94 &args, | |
95 CHECK_NULL); | |
96 | |
97 instanceOop p = (instanceOop) result.get_jobject(); | |
98 instanceHandle pool(THREAD, p); | |
99 | |
100 { | |
101 // Get lock since another thread may have create the instance | |
102 MutexLocker ml(Management_lock); | |
103 | |
104 // Check if another thread has created the pool. We reload | |
105 // _memory_pool_obj here because some other thread may have | |
106 // initialized it while we were executing the code before the lock. | |
107 // | |
108 // The lock has done an acquire, so the load can't float above it, | |
109 // but we need to do a load_acquire as above. | |
110 pool_obj = (instanceOop)OrderAccess::load_ptr_acquire(&_memory_pool_obj); | |
111 if (pool_obj != NULL) { | |
112 return pool_obj; | |
113 } | |
114 | |
115 // Get the address of the object we created via call_special. | |
116 pool_obj = pool(); | |
117 | |
118 // Use store barrier to make sure the memory accesses associated | |
119 // with creating the pool are visible before publishing its address. | |
120 // The unlock will publish the store to _memory_pool_obj because | |
121 // it does a release first. | |
122 OrderAccess::release_store_ptr(&_memory_pool_obj, pool_obj); | |
123 } | |
124 } | |
125 | |
126 return pool_obj; | |
127 } | |
128 | |
129 inline static size_t get_max_value(size_t val1, size_t val2) { | |
130 return (val1 > val2 ? val1 : val2); | |
131 } | |
132 | |
133 void MemoryPool::record_peak_memory_usage() { | |
134 // Caller in JDK is responsible for synchronization - | |
135 // acquire the lock for this memory pool before calling VM | |
136 MemoryUsage usage = get_memory_usage(); | |
137 size_t peak_used = get_max_value(usage.used(), _peak_usage.used()); | |
138 size_t peak_committed = get_max_value(usage.committed(), _peak_usage.committed()); | |
139 size_t peak_max_size = get_max_value(usage.max_size(), _peak_usage.max_size()); | |
140 | |
141 _peak_usage = MemoryUsage(initial_size(), peak_used, peak_committed, peak_max_size); | |
142 } | |
143 | |
144 static void set_sensor_obj_at(SensorInfo** sensor_ptr, instanceHandle sh) { | |
145 assert(*sensor_ptr == NULL, "Should be called only once"); | |
146 SensorInfo* sensor = new SensorInfo(); | |
147 sensor->set_sensor(sh()); | |
148 *sensor_ptr = sensor; | |
149 } | |
150 | |
151 void MemoryPool::set_usage_sensor_obj(instanceHandle sh) { | |
152 set_sensor_obj_at(&_usage_sensor, sh); | |
153 } | |
154 | |
155 void MemoryPool::set_gc_usage_sensor_obj(instanceHandle sh) { | |
156 set_sensor_obj_at(&_gc_usage_sensor, sh); | |
157 } | |
158 | |
159 void MemoryPool::oops_do(OopClosure* f) { | |
160 f->do_oop((oop*) &_memory_pool_obj); | |
161 if (_usage_sensor != NULL) { | |
162 _usage_sensor->oops_do(f); | |
163 } | |
164 if (_gc_usage_sensor != NULL) { | |
165 _gc_usage_sensor->oops_do(f); | |
166 } | |
167 } | |
168 | |
169 ContiguousSpacePool::ContiguousSpacePool(ContiguousSpace* space, | |
170 const char* name, | |
171 PoolType type, | |
172 size_t max_size, | |
173 bool support_usage_threshold) : | |
174 CollectedMemoryPool(name, type, space->capacity(), max_size, | |
175 support_usage_threshold), _space(space) { | |
176 } | |
177 | |
178 MemoryUsage ContiguousSpacePool::get_memory_usage() { | |
179 size_t maxSize = (available_for_allocation() ? max_size() : 0); | |
180 size_t used = used_in_bytes(); | |
181 size_t committed = _space->capacity(); | |
182 | |
183 return MemoryUsage(initial_size(), used, committed, maxSize); | |
184 } | |
185 | |
186 SurvivorContiguousSpacePool::SurvivorContiguousSpacePool(DefNewGeneration* gen, | |
187 const char* name, | |
188 PoolType type, | |
189 size_t max_size, | |
190 bool support_usage_threshold) : | |
191 CollectedMemoryPool(name, type, gen->from()->capacity(), max_size, | |
192 support_usage_threshold), _gen(gen) { | |
193 } | |
194 | |
195 MemoryUsage SurvivorContiguousSpacePool::get_memory_usage() { | |
196 size_t maxSize = (available_for_allocation() ? max_size() : 0); | |
197 size_t used = used_in_bytes(); | |
198 size_t committed = committed_in_bytes(); | |
199 | |
200 return MemoryUsage(initial_size(), used, committed, maxSize); | |
201 } | |
202 | |
203 #ifndef SERIALGC | |
204 CompactibleFreeListSpacePool::CompactibleFreeListSpacePool(CompactibleFreeListSpace* space, | |
205 const char* name, | |
206 PoolType type, | |
207 size_t max_size, | |
208 bool support_usage_threshold) : | |
209 CollectedMemoryPool(name, type, space->capacity(), max_size, | |
210 support_usage_threshold), _space(space) { | |
211 } | |
212 | |
213 MemoryUsage CompactibleFreeListSpacePool::get_memory_usage() { | |
214 size_t maxSize = (available_for_allocation() ? max_size() : 0); | |
215 size_t used = used_in_bytes(); | |
216 size_t committed = _space->capacity(); | |
217 | |
218 return MemoryUsage(initial_size(), used, committed, maxSize); | |
219 } | |
220 #endif // SERIALGC | |
221 | |
222 GenerationPool::GenerationPool(Generation* gen, | |
223 const char* name, | |
224 PoolType type, | |
225 bool support_usage_threshold) : | |
226 CollectedMemoryPool(name, type, gen->capacity(), gen->max_capacity(), | |
227 support_usage_threshold), _gen(gen) { | |
228 } | |
229 | |
230 MemoryUsage GenerationPool::get_memory_usage() { | |
231 size_t used = used_in_bytes(); | |
232 size_t committed = _gen->capacity(); | |
233 size_t maxSize = (available_for_allocation() ? max_size() : 0); | |
234 | |
235 return MemoryUsage(initial_size(), used, committed, maxSize); | |
236 } | |
237 | |
238 CodeHeapPool::CodeHeapPool(CodeHeap* codeHeap, const char* name, bool support_usage_threshold) : | |
239 MemoryPool(name, NonHeap, codeHeap->capacity(), codeHeap->max_capacity(), | |
240 support_usage_threshold, false), _codeHeap(codeHeap) { | |
241 } | |
242 | |
243 MemoryUsage CodeHeapPool::get_memory_usage() { | |
244 size_t used = used_in_bytes(); | |
245 size_t committed = _codeHeap->capacity(); | |
246 size_t maxSize = (available_for_allocation() ? max_size() : 0); | |
247 | |
248 return MemoryUsage(initial_size(), used, committed, maxSize); | |
249 } |