Mercurial > hg > graal-jvmci-8
annotate src/share/vm/services/memoryManager.cpp @ 23086:bf41eee321e5
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Reviewed-by: kvn
author | vlivanov |
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date | Thu, 11 Jun 2015 14:19:40 +0300 |
parents | ce8f6bb717c9 |
children | 7848fc12602b |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 2003, 2013, 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 #include "precompiled.hpp" |
26 #include "classfile/systemDictionary.hpp" | |
27 #include "classfile/vmSymbols.hpp" | |
28 #include "oops/oop.inline.hpp" | |
29 #include "runtime/handles.inline.hpp" | |
30 #include "runtime/javaCalls.hpp" | |
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31 #include "runtime/orderAccess.inline.hpp" |
1972 | 32 #include "services/lowMemoryDetector.hpp" |
33 #include "services/management.hpp" | |
34 #include "services/memoryManager.hpp" | |
35 #include "services/memoryPool.hpp" | |
36 #include "services/memoryService.hpp" | |
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37 #include "services/gcNotifier.hpp" |
1972 | 38 #include "utilities/dtrace.hpp" |
0 | 39 |
4006 | 40 #ifndef USDT2 |
0 | 41 HS_DTRACE_PROBE_DECL8(hotspot, mem__pool__gc__begin, char*, int, char*, int, |
42 size_t, size_t, size_t, size_t); | |
43 HS_DTRACE_PROBE_DECL8(hotspot, mem__pool__gc__end, char*, int, char*, int, | |
44 size_t, size_t, size_t, size_t); | |
4006 | 45 #endif /* !USDT2 */ |
0 | 46 |
47 MemoryManager::MemoryManager() { | |
48 _num_pools = 0; | |
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49 (void)const_cast<instanceOop&>(_memory_mgr_obj = NULL); |
0 | 50 } |
51 | |
52 void MemoryManager::add_pool(MemoryPool* pool) { | |
53 assert(_num_pools < MemoryManager::max_num_pools, "_num_pools exceeds the max"); | |
54 if (_num_pools < MemoryManager::max_num_pools) { | |
55 _pools[_num_pools] = pool; | |
56 _num_pools++; | |
57 } | |
58 pool->add_manager(this); | |
59 } | |
60 | |
61 MemoryManager* MemoryManager::get_code_cache_memory_manager() { | |
62 return (MemoryManager*) new CodeCacheMemoryManager(); | |
63 } | |
64 | |
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65 MemoryManager* MemoryManager::get_metaspace_memory_manager() { |
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66 return (MemoryManager*) new MetaspaceMemoryManager(); |
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67 } |
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68 |
0 | 69 GCMemoryManager* MemoryManager::get_copy_memory_manager() { |
70 return (GCMemoryManager*) new CopyMemoryManager(); | |
71 } | |
72 | |
73 GCMemoryManager* MemoryManager::get_msc_memory_manager() { | |
74 return (GCMemoryManager*) new MSCMemoryManager(); | |
75 } | |
76 | |
77 GCMemoryManager* MemoryManager::get_parnew_memory_manager() { | |
78 return (GCMemoryManager*) new ParNewMemoryManager(); | |
79 } | |
80 | |
81 GCMemoryManager* MemoryManager::get_cms_memory_manager() { | |
82 return (GCMemoryManager*) new CMSMemoryManager(); | |
83 } | |
84 | |
85 GCMemoryManager* MemoryManager::get_psScavenge_memory_manager() { | |
86 return (GCMemoryManager*) new PSScavengeMemoryManager(); | |
87 } | |
88 | |
89 GCMemoryManager* MemoryManager::get_psMarkSweep_memory_manager() { | |
90 return (GCMemoryManager*) new PSMarkSweepMemoryManager(); | |
91 } | |
92 | |
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93 GCMemoryManager* MemoryManager::get_g1YoungGen_memory_manager() { |
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94 return (GCMemoryManager*) new G1YoungGenMemoryManager(); |
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95 } |
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96 |
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97 GCMemoryManager* MemoryManager::get_g1OldGen_memory_manager() { |
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98 return (GCMemoryManager*) new G1OldGenMemoryManager(); |
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99 } |
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100 |
0 | 101 instanceOop MemoryManager::get_memory_manager_instance(TRAPS) { |
102 // Must do an acquire so as to force ordering of subsequent | |
103 // loads from anything _memory_mgr_obj points to or implies. | |
104 instanceOop mgr_obj = (instanceOop)OrderAccess::load_ptr_acquire(&_memory_mgr_obj); | |
105 if (mgr_obj == NULL) { | |
106 // It's ok for more than one thread to execute the code up to the locked region. | |
107 // Extra manager instances will just be gc'ed. | |
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108 Klass* k = Management::sun_management_ManagementFactory_klass(CHECK_0); |
0 | 109 instanceKlassHandle ik(THREAD, k); |
110 | |
111 Handle mgr_name = java_lang_String::create_from_str(name(), CHECK_0); | |
112 | |
113 JavaValue result(T_OBJECT); | |
114 JavaCallArguments args; | |
115 args.push_oop(mgr_name); // Argument 1 | |
116 | |
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117 Symbol* method_name = NULL; |
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118 Symbol* signature = NULL; |
0 | 119 if (is_gc_memory_manager()) { |
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120 method_name = vmSymbols::createGarbageCollector_name(); |
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121 signature = vmSymbols::createGarbageCollector_signature(); |
0 | 122 args.push_oop(Handle()); // Argument 2 (for future extension) |
123 } else { | |
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124 method_name = vmSymbols::createMemoryManager_name(); |
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125 signature = vmSymbols::createMemoryManager_signature(); |
0 | 126 } |
127 | |
128 JavaCalls::call_static(&result, | |
129 ik, | |
130 method_name, | |
131 signature, | |
132 &args, | |
133 CHECK_0); | |
134 | |
135 instanceOop m = (instanceOop) result.get_jobject(); | |
136 instanceHandle mgr(THREAD, m); | |
137 | |
138 { | |
139 // Get lock before setting _memory_mgr_obj | |
140 // since another thread may have created the instance | |
141 MutexLocker ml(Management_lock); | |
142 | |
143 // Check if another thread has created the management object. We reload | |
144 // _memory_mgr_obj here because some other thread may have initialized | |
145 // it while we were executing the code before the lock. | |
146 // | |
147 // The lock has done an acquire, so the load can't float above it, but | |
148 // we need to do a load_acquire as above. | |
149 mgr_obj = (instanceOop)OrderAccess::load_ptr_acquire(&_memory_mgr_obj); | |
150 if (mgr_obj != NULL) { | |
151 return mgr_obj; | |
152 } | |
153 | |
154 // Get the address of the object we created via call_special. | |
155 mgr_obj = mgr(); | |
156 | |
157 // Use store barrier to make sure the memory accesses associated | |
158 // with creating the management object are visible before publishing | |
159 // its address. The unlock will publish the store to _memory_mgr_obj | |
160 // because it does a release first. | |
161 OrderAccess::release_store_ptr(&_memory_mgr_obj, mgr_obj); | |
162 } | |
163 } | |
164 | |
165 return mgr_obj; | |
166 } | |
167 | |
168 void MemoryManager::oops_do(OopClosure* f) { | |
169 f->do_oop((oop*) &_memory_mgr_obj); | |
170 } | |
171 | |
172 GCStatInfo::GCStatInfo(int num_pools) { | |
173 // initialize the arrays for memory usage | |
6197 | 174 _before_gc_usage_array = (MemoryUsage*) NEW_C_HEAP_ARRAY(MemoryUsage, num_pools, mtInternal); |
175 _after_gc_usage_array = (MemoryUsage*) NEW_C_HEAP_ARRAY(MemoryUsage, num_pools, mtInternal); | |
0 | 176 _usage_array_size = num_pools; |
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177 clear(); |
0 | 178 } |
179 | |
180 GCStatInfo::~GCStatInfo() { | |
6197 | 181 FREE_C_HEAP_ARRAY(MemoryUsage*, _before_gc_usage_array, mtInternal); |
182 FREE_C_HEAP_ARRAY(MemoryUsage*, _after_gc_usage_array, mtInternal); | |
0 | 183 } |
184 | |
185 void GCStatInfo::set_gc_usage(int pool_index, MemoryUsage usage, bool before_gc) { | |
186 MemoryUsage* gc_usage_array; | |
187 if (before_gc) { | |
188 gc_usage_array = _before_gc_usage_array; | |
189 } else { | |
190 gc_usage_array = _after_gc_usage_array; | |
191 } | |
192 gc_usage_array[pool_index] = usage; | |
193 } | |
194 | |
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195 void GCStatInfo::clear() { |
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196 _index = 0; |
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197 _start_time = 0L; |
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198 _end_time = 0L; |
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199 size_t len = _usage_array_size * sizeof(MemoryUsage); |
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200 memset(_before_gc_usage_array, 0, len); |
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201 memset(_after_gc_usage_array, 0, len); |
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202 } |
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203 |
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204 |
0 | 205 GCMemoryManager::GCMemoryManager() : MemoryManager() { |
206 _num_collections = 0; | |
207 _last_gc_stat = NULL; | |
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208 _last_gc_lock = new Mutex(Mutex::leaf, "_last_gc_lock", true); |
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209 _current_gc_stat = NULL; |
0 | 210 _num_gc_threads = 1; |
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211 _notification_enabled = false; |
0 | 212 } |
213 | |
214 GCMemoryManager::~GCMemoryManager() { | |
215 delete _last_gc_stat; | |
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216 delete _last_gc_lock; |
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217 delete _current_gc_stat; |
0 | 218 } |
219 | |
220 void GCMemoryManager::initialize_gc_stat_info() { | |
221 assert(MemoryService::num_memory_pools() > 0, "should have one or more memory pools"); | |
6197 | 222 _last_gc_stat = new(ResourceObj::C_HEAP, mtGC) GCStatInfo(MemoryService::num_memory_pools()); |
223 _current_gc_stat = new(ResourceObj::C_HEAP, mtGC) GCStatInfo(MemoryService::num_memory_pools()); | |
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224 // tracking concurrent collections we need two objects: one to update, and one to |
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225 // hold the publicly available "last (completed) gc" information. |
0 | 226 } |
227 | |
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228 void GCMemoryManager::gc_begin(bool recordGCBeginTime, bool recordPreGCUsage, |
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229 bool recordAccumulatedGCTime) { |
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230 assert(_last_gc_stat != NULL && _current_gc_stat != NULL, "Just checking"); |
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231 if (recordAccumulatedGCTime) { |
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232 _accumulated_timer.start(); |
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233 } |
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234 // _num_collections now increases in gc_end, to count completed collections |
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235 if (recordGCBeginTime) { |
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236 _current_gc_stat->set_index(_num_collections+1); |
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237 _current_gc_stat->set_start_time(Management::timestamp()); |
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238 } |
0 | 239 |
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240 if (recordPreGCUsage) { |
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241 // Keep memory usage of all memory pools |
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242 for (int i = 0; i < MemoryService::num_memory_pools(); i++) { |
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243 MemoryPool* pool = MemoryService::get_memory_pool(i); |
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244 MemoryUsage usage = pool->get_memory_usage(); |
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245 _current_gc_stat->set_before_gc_usage(i, usage); |
4006 | 246 #ifndef USDT2 |
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247 HS_DTRACE_PROBE8(hotspot, mem__pool__gc__begin, |
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248 name(), strlen(name()), |
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249 pool->name(), strlen(pool->name()), |
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250 usage.init_size(), usage.used(), |
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251 usage.committed(), usage.max_size()); |
4006 | 252 #else /* USDT2 */ |
253 HOTSPOT_MEM_POOL_GC_BEGIN( | |
254 (char *) name(), strlen(name()), | |
255 (char *) pool->name(), strlen(pool->name()), | |
256 usage.init_size(), usage.used(), | |
257 usage.committed(), usage.max_size()); | |
258 #endif /* USDT2 */ | |
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259 } |
0 | 260 } |
261 } | |
262 | |
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263 // A collector MUST, even if it does not complete for some reason, |
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264 // make a TraceMemoryManagerStats object where countCollection is true, |
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265 // to ensure the current gc stat is placed in _last_gc_stat. |
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266 void GCMemoryManager::gc_end(bool recordPostGCUsage, |
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267 bool recordAccumulatedGCTime, |
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268 bool recordGCEndTime, bool countCollection, |
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269 GCCause::Cause cause) { |
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270 if (recordAccumulatedGCTime) { |
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271 _accumulated_timer.stop(); |
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272 } |
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273 if (recordGCEndTime) { |
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274 _current_gc_stat->set_end_time(Management::timestamp()); |
0 | 275 } |
276 | |
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277 if (recordPostGCUsage) { |
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278 int i; |
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279 // keep the last gc statistics for all memory pools |
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280 for (i = 0; i < MemoryService::num_memory_pools(); i++) { |
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281 MemoryPool* pool = MemoryService::get_memory_pool(i); |
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282 MemoryUsage usage = pool->get_memory_usage(); |
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283 |
4006 | 284 #ifndef USDT2 |
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285 HS_DTRACE_PROBE8(hotspot, mem__pool__gc__end, |
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286 name(), strlen(name()), |
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287 pool->name(), strlen(pool->name()), |
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288 usage.init_size(), usage.used(), |
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289 usage.committed(), usage.max_size()); |
4006 | 290 #else /* USDT2 */ |
291 HOTSPOT_MEM_POOL_GC_END( | |
292 (char *) name(), strlen(name()), | |
293 (char *) pool->name(), strlen(pool->name()), | |
294 usage.init_size(), usage.used(), | |
295 usage.committed(), usage.max_size()); | |
296 #endif /* USDT2 */ | |
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297 |
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298 _current_gc_stat->set_after_gc_usage(i, usage); |
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299 } |
0 | 300 |
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301 // Set last collection usage of the memory pools managed by this collector |
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302 for (i = 0; i < num_memory_pools(); i++) { |
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303 MemoryPool* pool = get_memory_pool(i); |
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304 MemoryUsage usage = pool->get_memory_usage(); |
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305 |
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306 // Compare with GC usage threshold |
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307 pool->set_last_collection_usage(usage); |
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308 LowMemoryDetector::detect_after_gc_memory(pool); |
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309 } |
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310 } |
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311 |
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312 if (countCollection) { |
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313 _num_collections++; |
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314 // alternately update two objects making one public when complete |
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315 { |
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316 MutexLockerEx ml(_last_gc_lock, Mutex::_no_safepoint_check_flag); |
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317 GCStatInfo *tmp = _last_gc_stat; |
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318 _last_gc_stat = _current_gc_stat; |
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319 _current_gc_stat = tmp; |
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320 // reset the current stat for diagnosability purposes |
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321 _current_gc_stat->clear(); |
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322 } |
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323 |
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324 if (is_notification_enabled()) { |
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325 bool isMajorGC = this == MemoryService::get_major_gc_manager(); |
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326 GCNotifier::pushNotification(this, isMajorGC ? "end of major GC" : "end of minor GC", |
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327 GCCause::to_string(cause)); |
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328 } |
0 | 329 } |
330 } | |
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331 |
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332 size_t GCMemoryManager::get_last_gc_stat(GCStatInfo* dest) { |
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333 MutexLockerEx ml(_last_gc_lock, Mutex::_no_safepoint_check_flag); |
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334 if (_last_gc_stat->gc_index() != 0) { |
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335 dest->set_index(_last_gc_stat->gc_index()); |
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336 dest->set_start_time(_last_gc_stat->start_time()); |
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337 dest->set_end_time(_last_gc_stat->end_time()); |
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338 assert(dest->usage_array_size() == _last_gc_stat->usage_array_size(), |
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339 "Must have same array size"); |
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340 size_t len = dest->usage_array_size() * sizeof(MemoryUsage); |
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341 memcpy(dest->before_gc_usage_array(), _last_gc_stat->before_gc_usage_array(), len); |
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342 memcpy(dest->after_gc_usage_array(), _last_gc_stat->after_gc_usage_array(), len); |
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343 } |
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344 return _last_gc_stat->gc_index(); |
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345 } |