Mercurial > hg > truffle
annotate src/share/vm/services/memoryManager.cpp @ 7090:05ce1defa4f9
Common out some parts of UnsafeLoad/Store in UnsafeAccess
author | Gilles Duboscq <duboscq@ssw.jku.at> |
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date | Thu, 29 Nov 2012 13:24:08 +0100 |
parents | da91efe96a93 |
children | dbd5837b342f |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 2003, 2012, 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" | |
31 #include "services/lowMemoryDetector.hpp" | |
32 #include "services/management.hpp" | |
33 #include "services/memoryManager.hpp" | |
34 #include "services/memoryPool.hpp" | |
35 #include "services/memoryService.hpp" | |
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36 #include "services/gcNotifier.hpp" |
1972 | 37 #include "utilities/dtrace.hpp" |
0 | 38 |
4006 | 39 #ifndef USDT2 |
0 | 40 HS_DTRACE_PROBE_DECL8(hotspot, mem__pool__gc__begin, char*, int, char*, int, |
41 size_t, size_t, size_t, size_t); | |
42 HS_DTRACE_PROBE_DECL8(hotspot, mem__pool__gc__end, char*, int, char*, int, | |
43 size_t, size_t, size_t, size_t); | |
4006 | 44 #endif /* !USDT2 */ |
0 | 45 |
46 MemoryManager::MemoryManager() { | |
47 _num_pools = 0; | |
48 _memory_mgr_obj = NULL; | |
49 } | |
50 | |
51 void MemoryManager::add_pool(MemoryPool* pool) { | |
52 assert(_num_pools < MemoryManager::max_num_pools, "_num_pools exceeds the max"); | |
53 if (_num_pools < MemoryManager::max_num_pools) { | |
54 _pools[_num_pools] = pool; | |
55 _num_pools++; | |
56 } | |
57 pool->add_manager(this); | |
58 } | |
59 | |
60 MemoryManager* MemoryManager::get_code_cache_memory_manager() { | |
61 return (MemoryManager*) new CodeCacheMemoryManager(); | |
62 } | |
63 | |
64 GCMemoryManager* MemoryManager::get_copy_memory_manager() { | |
65 return (GCMemoryManager*) new CopyMemoryManager(); | |
66 } | |
67 | |
68 GCMemoryManager* MemoryManager::get_msc_memory_manager() { | |
69 return (GCMemoryManager*) new MSCMemoryManager(); | |
70 } | |
71 | |
72 GCMemoryManager* MemoryManager::get_parnew_memory_manager() { | |
73 return (GCMemoryManager*) new ParNewMemoryManager(); | |
74 } | |
75 | |
76 GCMemoryManager* MemoryManager::get_cms_memory_manager() { | |
77 return (GCMemoryManager*) new CMSMemoryManager(); | |
78 } | |
79 | |
80 GCMemoryManager* MemoryManager::get_psScavenge_memory_manager() { | |
81 return (GCMemoryManager*) new PSScavengeMemoryManager(); | |
82 } | |
83 | |
84 GCMemoryManager* MemoryManager::get_psMarkSweep_memory_manager() { | |
85 return (GCMemoryManager*) new PSMarkSweepMemoryManager(); | |
86 } | |
87 | |
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88 GCMemoryManager* MemoryManager::get_g1YoungGen_memory_manager() { |
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89 return (GCMemoryManager*) new G1YoungGenMemoryManager(); |
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90 } |
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91 |
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92 GCMemoryManager* MemoryManager::get_g1OldGen_memory_manager() { |
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93 return (GCMemoryManager*) new G1OldGenMemoryManager(); |
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94 } |
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95 |
0 | 96 instanceOop MemoryManager::get_memory_manager_instance(TRAPS) { |
97 // Must do an acquire so as to force ordering of subsequent | |
98 // loads from anything _memory_mgr_obj points to or implies. | |
99 instanceOop mgr_obj = (instanceOop)OrderAccess::load_ptr_acquire(&_memory_mgr_obj); | |
100 if (mgr_obj == NULL) { | |
101 // It's ok for more than one thread to execute the code up to the locked region. | |
102 // Extra manager instances will just be gc'ed. | |
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103 Klass* k = Management::sun_management_ManagementFactory_klass(CHECK_0); |
0 | 104 instanceKlassHandle ik(THREAD, k); |
105 | |
106 Handle mgr_name = java_lang_String::create_from_str(name(), CHECK_0); | |
107 | |
108 JavaValue result(T_OBJECT); | |
109 JavaCallArguments args; | |
110 args.push_oop(mgr_name); // Argument 1 | |
111 | |
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112 Symbol* method_name = NULL; |
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113 Symbol* signature = NULL; |
0 | 114 if (is_gc_memory_manager()) { |
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115 method_name = vmSymbols::createGarbageCollector_name(); |
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116 signature = vmSymbols::createGarbageCollector_signature(); |
0 | 117 args.push_oop(Handle()); // Argument 2 (for future extension) |
118 } else { | |
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119 method_name = vmSymbols::createMemoryManager_name(); |
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120 signature = vmSymbols::createMemoryManager_signature(); |
0 | 121 } |
122 | |
123 JavaCalls::call_static(&result, | |
124 ik, | |
125 method_name, | |
126 signature, | |
127 &args, | |
128 CHECK_0); | |
129 | |
130 instanceOop m = (instanceOop) result.get_jobject(); | |
131 instanceHandle mgr(THREAD, m); | |
132 | |
133 { | |
134 // Get lock before setting _memory_mgr_obj | |
135 // since another thread may have created the instance | |
136 MutexLocker ml(Management_lock); | |
137 | |
138 // Check if another thread has created the management object. We reload | |
139 // _memory_mgr_obj here because some other thread may have initialized | |
140 // it while we were executing the code before the lock. | |
141 // | |
142 // The lock has done an acquire, so the load can't float above it, but | |
143 // we need to do a load_acquire as above. | |
144 mgr_obj = (instanceOop)OrderAccess::load_ptr_acquire(&_memory_mgr_obj); | |
145 if (mgr_obj != NULL) { | |
146 return mgr_obj; | |
147 } | |
148 | |
149 // Get the address of the object we created via call_special. | |
150 mgr_obj = mgr(); | |
151 | |
152 // Use store barrier to make sure the memory accesses associated | |
153 // with creating the management object are visible before publishing | |
154 // its address. The unlock will publish the store to _memory_mgr_obj | |
155 // because it does a release first. | |
156 OrderAccess::release_store_ptr(&_memory_mgr_obj, mgr_obj); | |
157 } | |
158 } | |
159 | |
160 return mgr_obj; | |
161 } | |
162 | |
163 void MemoryManager::oops_do(OopClosure* f) { | |
164 f->do_oop((oop*) &_memory_mgr_obj); | |
165 } | |
166 | |
167 GCStatInfo::GCStatInfo(int num_pools) { | |
168 // initialize the arrays for memory usage | |
6197 | 169 _before_gc_usage_array = (MemoryUsage*) NEW_C_HEAP_ARRAY(MemoryUsage, num_pools, mtInternal); |
170 _after_gc_usage_array = (MemoryUsage*) NEW_C_HEAP_ARRAY(MemoryUsage, num_pools, mtInternal); | |
0 | 171 _usage_array_size = num_pools; |
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172 clear(); |
0 | 173 } |
174 | |
175 GCStatInfo::~GCStatInfo() { | |
6197 | 176 FREE_C_HEAP_ARRAY(MemoryUsage*, _before_gc_usage_array, mtInternal); |
177 FREE_C_HEAP_ARRAY(MemoryUsage*, _after_gc_usage_array, mtInternal); | |
0 | 178 } |
179 | |
180 void GCStatInfo::set_gc_usage(int pool_index, MemoryUsage usage, bool before_gc) { | |
181 MemoryUsage* gc_usage_array; | |
182 if (before_gc) { | |
183 gc_usage_array = _before_gc_usage_array; | |
184 } else { | |
185 gc_usage_array = _after_gc_usage_array; | |
186 } | |
187 gc_usage_array[pool_index] = usage; | |
188 } | |
189 | |
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190 void GCStatInfo::clear() { |
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191 _index = 0; |
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192 _start_time = 0L; |
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193 _end_time = 0L; |
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194 size_t len = _usage_array_size * sizeof(MemoryUsage); |
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195 memset(_before_gc_usage_array, 0, len); |
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196 memset(_after_gc_usage_array, 0, len); |
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197 } |
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198 |
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199 |
0 | 200 GCMemoryManager::GCMemoryManager() : MemoryManager() { |
201 _num_collections = 0; | |
202 _last_gc_stat = NULL; | |
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203 _last_gc_lock = new Mutex(Mutex::leaf, "_last_gc_lock", true); |
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204 _current_gc_stat = NULL; |
0 | 205 _num_gc_threads = 1; |
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206 _notification_enabled = false; |
0 | 207 } |
208 | |
209 GCMemoryManager::~GCMemoryManager() { | |
210 delete _last_gc_stat; | |
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211 delete _last_gc_lock; |
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212 delete _current_gc_stat; |
0 | 213 } |
214 | |
215 void GCMemoryManager::initialize_gc_stat_info() { | |
216 assert(MemoryService::num_memory_pools() > 0, "should have one or more memory pools"); | |
6197 | 217 _last_gc_stat = new(ResourceObj::C_HEAP, mtGC) GCStatInfo(MemoryService::num_memory_pools()); |
218 _current_gc_stat = new(ResourceObj::C_HEAP, mtGC) GCStatInfo(MemoryService::num_memory_pools()); | |
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219 // tracking concurrent collections we need two objects: one to update, and one to |
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220 // hold the publicly available "last (completed) gc" information. |
0 | 221 } |
222 | |
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223 void GCMemoryManager::gc_begin(bool recordGCBeginTime, bool recordPreGCUsage, |
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224 bool recordAccumulatedGCTime) { |
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225 assert(_last_gc_stat != NULL && _current_gc_stat != NULL, "Just checking"); |
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226 if (recordAccumulatedGCTime) { |
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227 _accumulated_timer.start(); |
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228 } |
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229 // _num_collections now increases in gc_end, to count completed collections |
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230 if (recordGCBeginTime) { |
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231 _current_gc_stat->set_index(_num_collections+1); |
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232 _current_gc_stat->set_start_time(Management::timestamp()); |
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233 } |
0 | 234 |
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235 if (recordPreGCUsage) { |
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236 // Keep memory usage of all memory pools |
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237 for (int i = 0; i < MemoryService::num_memory_pools(); i++) { |
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238 MemoryPool* pool = MemoryService::get_memory_pool(i); |
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239 MemoryUsage usage = pool->get_memory_usage(); |
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240 _current_gc_stat->set_before_gc_usage(i, usage); |
4006 | 241 #ifndef USDT2 |
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242 HS_DTRACE_PROBE8(hotspot, mem__pool__gc__begin, |
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243 name(), strlen(name()), |
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244 pool->name(), strlen(pool->name()), |
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245 usage.init_size(), usage.used(), |
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246 usage.committed(), usage.max_size()); |
4006 | 247 #else /* USDT2 */ |
248 HOTSPOT_MEM_POOL_GC_BEGIN( | |
249 (char *) name(), strlen(name()), | |
250 (char *) pool->name(), strlen(pool->name()), | |
251 usage.init_size(), usage.used(), | |
252 usage.committed(), usage.max_size()); | |
253 #endif /* USDT2 */ | |
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254 } |
0 | 255 } |
256 } | |
257 | |
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258 // A collector MUST, even if it does not complete for some reason, |
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259 // make a TraceMemoryManagerStats object where countCollection is true, |
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260 // to ensure the current gc stat is placed in _last_gc_stat. |
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261 void GCMemoryManager::gc_end(bool recordPostGCUsage, |
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262 bool recordAccumulatedGCTime, |
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263 bool recordGCEndTime, bool countCollection, |
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264 GCCause::Cause cause) { |
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265 if (recordAccumulatedGCTime) { |
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266 _accumulated_timer.stop(); |
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267 } |
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268 if (recordGCEndTime) { |
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269 _current_gc_stat->set_end_time(Management::timestamp()); |
0 | 270 } |
271 | |
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272 if (recordPostGCUsage) { |
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273 int i; |
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274 // keep the last gc statistics for all memory pools |
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275 for (i = 0; i < MemoryService::num_memory_pools(); i++) { |
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276 MemoryPool* pool = MemoryService::get_memory_pool(i); |
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277 MemoryUsage usage = pool->get_memory_usage(); |
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278 |
4006 | 279 #ifndef USDT2 |
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280 HS_DTRACE_PROBE8(hotspot, mem__pool__gc__end, |
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281 name(), strlen(name()), |
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282 pool->name(), strlen(pool->name()), |
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283 usage.init_size(), usage.used(), |
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284 usage.committed(), usage.max_size()); |
4006 | 285 #else /* USDT2 */ |
286 HOTSPOT_MEM_POOL_GC_END( | |
287 (char *) name(), strlen(name()), | |
288 (char *) pool->name(), strlen(pool->name()), | |
289 usage.init_size(), usage.used(), | |
290 usage.committed(), usage.max_size()); | |
291 #endif /* USDT2 */ | |
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292 |
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293 _current_gc_stat->set_after_gc_usage(i, usage); |
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294 } |
0 | 295 |
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296 // Set last collection usage of the memory pools managed by this collector |
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297 for (i = 0; i < num_memory_pools(); i++) { |
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298 MemoryPool* pool = get_memory_pool(i); |
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299 MemoryUsage usage = pool->get_memory_usage(); |
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300 |
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301 // Compare with GC usage threshold |
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302 pool->set_last_collection_usage(usage); |
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303 LowMemoryDetector::detect_after_gc_memory(pool); |
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304 } |
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305 } |
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306 |
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307 if (countCollection) { |
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308 _num_collections++; |
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309 // alternately update two objects making one public when complete |
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310 { |
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311 MutexLockerEx ml(_last_gc_lock, Mutex::_no_safepoint_check_flag); |
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312 GCStatInfo *tmp = _last_gc_stat; |
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313 _last_gc_stat = _current_gc_stat; |
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314 _current_gc_stat = tmp; |
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315 // reset the current stat for diagnosability purposes |
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316 _current_gc_stat->clear(); |
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317 } |
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318 |
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319 if (is_notification_enabled()) { |
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320 bool isMajorGC = this == MemoryService::get_major_gc_manager(); |
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321 GCNotifier::pushNotification(this, isMajorGC ? "end of major GC" : "end of minor GC", |
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322 GCCause::to_string(cause)); |
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323 } |
0 | 324 } |
325 } | |
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326 |
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327 size_t GCMemoryManager::get_last_gc_stat(GCStatInfo* dest) { |
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328 MutexLockerEx ml(_last_gc_lock, Mutex::_no_safepoint_check_flag); |
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329 if (_last_gc_stat->gc_index() != 0) { |
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330 dest->set_index(_last_gc_stat->gc_index()); |
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331 dest->set_start_time(_last_gc_stat->start_time()); |
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332 dest->set_end_time(_last_gc_stat->end_time()); |
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333 assert(dest->usage_array_size() == _last_gc_stat->usage_array_size(), |
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334 "Must have same array size"); |
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335 size_t len = dest->usage_array_size() * sizeof(MemoryUsage); |
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336 memcpy(dest->before_gc_usage_array(), _last_gc_stat->before_gc_usage_array(), len); |
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337 memcpy(dest->after_gc_usage_array(), _last_gc_stat->after_gc_usage_array(), len); |
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338 } |
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339 return _last_gc_stat->gc_index(); |
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340 } |