Mercurial > hg > graal-jvmci-8
comparison src/share/vm/services/memoryManager.cpp @ 0:a61af66fc99e jdk7-b24
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author | duke |
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date | Sat, 01 Dec 2007 00:00:00 +0000 |
parents | |
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 # include "incls/_precompiled.incl" | |
26 # include "incls/_memoryManager.cpp.incl" | |
27 | |
28 HS_DTRACE_PROBE_DECL8(hotspot, mem__pool__gc__begin, char*, int, char*, int, | |
29 size_t, size_t, size_t, size_t); | |
30 HS_DTRACE_PROBE_DECL8(hotspot, mem__pool__gc__end, char*, int, char*, int, | |
31 size_t, size_t, size_t, size_t); | |
32 | |
33 MemoryManager::MemoryManager() { | |
34 _num_pools = 0; | |
35 _memory_mgr_obj = NULL; | |
36 } | |
37 | |
38 void MemoryManager::add_pool(MemoryPool* pool) { | |
39 assert(_num_pools < MemoryManager::max_num_pools, "_num_pools exceeds the max"); | |
40 if (_num_pools < MemoryManager::max_num_pools) { | |
41 _pools[_num_pools] = pool; | |
42 _num_pools++; | |
43 } | |
44 pool->add_manager(this); | |
45 } | |
46 | |
47 MemoryManager* MemoryManager::get_code_cache_memory_manager() { | |
48 return (MemoryManager*) new CodeCacheMemoryManager(); | |
49 } | |
50 | |
51 GCMemoryManager* MemoryManager::get_copy_memory_manager() { | |
52 return (GCMemoryManager*) new CopyMemoryManager(); | |
53 } | |
54 | |
55 GCMemoryManager* MemoryManager::get_msc_memory_manager() { | |
56 return (GCMemoryManager*) new MSCMemoryManager(); | |
57 } | |
58 | |
59 GCMemoryManager* MemoryManager::get_parnew_memory_manager() { | |
60 return (GCMemoryManager*) new ParNewMemoryManager(); | |
61 } | |
62 | |
63 GCMemoryManager* MemoryManager::get_cms_memory_manager() { | |
64 return (GCMemoryManager*) new CMSMemoryManager(); | |
65 } | |
66 | |
67 GCMemoryManager* MemoryManager::get_psScavenge_memory_manager() { | |
68 return (GCMemoryManager*) new PSScavengeMemoryManager(); | |
69 } | |
70 | |
71 GCMemoryManager* MemoryManager::get_psMarkSweep_memory_manager() { | |
72 return (GCMemoryManager*) new PSMarkSweepMemoryManager(); | |
73 } | |
74 | |
75 instanceOop MemoryManager::get_memory_manager_instance(TRAPS) { | |
76 // Must do an acquire so as to force ordering of subsequent | |
77 // loads from anything _memory_mgr_obj points to or implies. | |
78 instanceOop mgr_obj = (instanceOop)OrderAccess::load_ptr_acquire(&_memory_mgr_obj); | |
79 if (mgr_obj == NULL) { | |
80 // It's ok for more than one thread to execute the code up to the locked region. | |
81 // Extra manager instances will just be gc'ed. | |
82 klassOop k = Management::sun_management_ManagementFactory_klass(CHECK_0); | |
83 instanceKlassHandle ik(THREAD, k); | |
84 | |
85 Handle mgr_name = java_lang_String::create_from_str(name(), CHECK_0); | |
86 | |
87 JavaValue result(T_OBJECT); | |
88 JavaCallArguments args; | |
89 args.push_oop(mgr_name); // Argument 1 | |
90 | |
91 symbolHandle method_name; | |
92 symbolHandle signature; | |
93 if (is_gc_memory_manager()) { | |
94 method_name = vmSymbolHandles::createGarbageCollector_name(); | |
95 signature = vmSymbolHandles::createGarbageCollector_signature(); | |
96 args.push_oop(Handle()); // Argument 2 (for future extension) | |
97 } else { | |
98 method_name = vmSymbolHandles::createMemoryManager_name(); | |
99 signature = vmSymbolHandles::createMemoryManager_signature(); | |
100 } | |
101 | |
102 JavaCalls::call_static(&result, | |
103 ik, | |
104 method_name, | |
105 signature, | |
106 &args, | |
107 CHECK_0); | |
108 | |
109 instanceOop m = (instanceOop) result.get_jobject(); | |
110 instanceHandle mgr(THREAD, m); | |
111 | |
112 { | |
113 // Get lock before setting _memory_mgr_obj | |
114 // since another thread may have created the instance | |
115 MutexLocker ml(Management_lock); | |
116 | |
117 // Check if another thread has created the management object. We reload | |
118 // _memory_mgr_obj here because some other thread may have initialized | |
119 // it while we were executing the code before the lock. | |
120 // | |
121 // The lock has done an acquire, so the load can't float above it, but | |
122 // we need to do a load_acquire as above. | |
123 mgr_obj = (instanceOop)OrderAccess::load_ptr_acquire(&_memory_mgr_obj); | |
124 if (mgr_obj != NULL) { | |
125 return mgr_obj; | |
126 } | |
127 | |
128 // Get the address of the object we created via call_special. | |
129 mgr_obj = mgr(); | |
130 | |
131 // Use store barrier to make sure the memory accesses associated | |
132 // with creating the management object are visible before publishing | |
133 // its address. The unlock will publish the store to _memory_mgr_obj | |
134 // because it does a release first. | |
135 OrderAccess::release_store_ptr(&_memory_mgr_obj, mgr_obj); | |
136 } | |
137 } | |
138 | |
139 return mgr_obj; | |
140 } | |
141 | |
142 void MemoryManager::oops_do(OopClosure* f) { | |
143 f->do_oop((oop*) &_memory_mgr_obj); | |
144 } | |
145 | |
146 GCStatInfo::GCStatInfo(int num_pools) { | |
147 // initialize the arrays for memory usage | |
148 _before_gc_usage_array = (MemoryUsage*) NEW_C_HEAP_ARRAY(MemoryUsage, num_pools); | |
149 _after_gc_usage_array = (MemoryUsage*) NEW_C_HEAP_ARRAY(MemoryUsage, num_pools); | |
150 size_t len = num_pools * sizeof(MemoryUsage); | |
151 memset(_before_gc_usage_array, 0, len); | |
152 memset(_after_gc_usage_array, 0, len); | |
153 _usage_array_size = num_pools; | |
154 } | |
155 | |
156 GCStatInfo::~GCStatInfo() { | |
157 FREE_C_HEAP_ARRAY(MemoryUsage*, _before_gc_usage_array); | |
158 FREE_C_HEAP_ARRAY(MemoryUsage*, _after_gc_usage_array); | |
159 } | |
160 | |
161 void GCStatInfo::copy_stat(GCStatInfo* stat) { | |
162 set_index(stat->gc_index()); | |
163 set_start_time(stat->start_time()); | |
164 set_end_time(stat->end_time()); | |
165 assert(_usage_array_size == stat->usage_array_size(), "Must have same array size"); | |
166 for (int i = 0; i < _usage_array_size; i++) { | |
167 set_before_gc_usage(i, stat->before_gc_usage_for_pool(i)); | |
168 set_after_gc_usage(i, stat->after_gc_usage_for_pool(i)); | |
169 } | |
170 } | |
171 | |
172 void GCStatInfo::set_gc_usage(int pool_index, MemoryUsage usage, bool before_gc) { | |
173 MemoryUsage* gc_usage_array; | |
174 if (before_gc) { | |
175 gc_usage_array = _before_gc_usage_array; | |
176 } else { | |
177 gc_usage_array = _after_gc_usage_array; | |
178 } | |
179 gc_usage_array[pool_index] = usage; | |
180 } | |
181 | |
182 GCMemoryManager::GCMemoryManager() : MemoryManager() { | |
183 _num_collections = 0; | |
184 _last_gc_stat = NULL; | |
185 _num_gc_threads = 1; | |
186 } | |
187 | |
188 GCMemoryManager::~GCMemoryManager() { | |
189 delete _last_gc_stat; | |
190 } | |
191 | |
192 void GCMemoryManager::initialize_gc_stat_info() { | |
193 assert(MemoryService::num_memory_pools() > 0, "should have one or more memory pools"); | |
194 _last_gc_stat = new GCStatInfo(MemoryService::num_memory_pools()); | |
195 } | |
196 | |
197 void GCMemoryManager::gc_begin() { | |
198 assert(_last_gc_stat != NULL, "Just checking"); | |
199 _accumulated_timer.start(); | |
200 _num_collections++; | |
201 _last_gc_stat->set_index(_num_collections); | |
202 _last_gc_stat->set_start_time(Management::timestamp()); | |
203 | |
204 // Keep memory usage of all memory pools | |
205 for (int i = 0; i < MemoryService::num_memory_pools(); i++) { | |
206 MemoryPool* pool = MemoryService::get_memory_pool(i); | |
207 MemoryUsage usage = pool->get_memory_usage(); | |
208 _last_gc_stat->set_before_gc_usage(i, usage); | |
209 HS_DTRACE_PROBE8(hotspot, mem__pool__gc__begin, | |
210 name(), strlen(name()), | |
211 pool->name(), strlen(pool->name()), | |
212 usage.init_size(), usage.used(), | |
213 usage.committed(), usage.max_size()); | |
214 } | |
215 } | |
216 | |
217 void GCMemoryManager::gc_end() { | |
218 _accumulated_timer.stop(); | |
219 _last_gc_stat->set_end_time(Management::timestamp()); | |
220 | |
221 int i; | |
222 // keep the last gc statistics for all memory pools | |
223 for (i = 0; i < MemoryService::num_memory_pools(); i++) { | |
224 MemoryPool* pool = MemoryService::get_memory_pool(i); | |
225 MemoryUsage usage = pool->get_memory_usage(); | |
226 | |
227 HS_DTRACE_PROBE8(hotspot, mem__pool__gc__end, | |
228 name(), strlen(name()), | |
229 pool->name(), strlen(pool->name()), | |
230 usage.init_size(), usage.used(), | |
231 usage.committed(), usage.max_size()); | |
232 | |
233 _last_gc_stat->set_after_gc_usage(i, usage); | |
234 } | |
235 | |
236 // Set last collection usage of the memory pools managed by this collector | |
237 for (i = 0; i < num_memory_pools(); i++) { | |
238 MemoryPool* pool = get_memory_pool(i); | |
239 MemoryUsage usage = pool->get_memory_usage(); | |
240 | |
241 // Compare with GC usage threshold | |
242 pool->set_last_collection_usage(usage); | |
243 LowMemoryDetector::detect_after_gc_memory(pool); | |
244 } | |
245 } |