Mercurial > hg > truffle
annotate src/share/vm/services/memoryManager.cpp @ 3109:3664989976e2
Merge
author | Gilles Duboscq <gilles.duboscq@oracle.com> |
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date | Fri, 01 Jul 2011 12:57:10 +0200 |
parents | 1d1603768966 |
children | 78542e2b5e35 |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 2003, 2011, 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" | |
36 #include "utilities/dtrace.hpp" | |
0 | 37 |
38 HS_DTRACE_PROBE_DECL8(hotspot, mem__pool__gc__begin, char*, int, char*, int, | |
39 size_t, size_t, size_t, size_t); | |
40 HS_DTRACE_PROBE_DECL8(hotspot, mem__pool__gc__end, char*, int, char*, int, | |
41 size_t, size_t, size_t, size_t); | |
42 | |
43 MemoryManager::MemoryManager() { | |
44 _num_pools = 0; | |
45 _memory_mgr_obj = NULL; | |
46 } | |
47 | |
48 void MemoryManager::add_pool(MemoryPool* pool) { | |
49 assert(_num_pools < MemoryManager::max_num_pools, "_num_pools exceeds the max"); | |
50 if (_num_pools < MemoryManager::max_num_pools) { | |
51 _pools[_num_pools] = pool; | |
52 _num_pools++; | |
53 } | |
54 pool->add_manager(this); | |
55 } | |
56 | |
57 MemoryManager* MemoryManager::get_code_cache_memory_manager() { | |
58 return (MemoryManager*) new CodeCacheMemoryManager(); | |
59 } | |
60 | |
61 GCMemoryManager* MemoryManager::get_copy_memory_manager() { | |
62 return (GCMemoryManager*) new CopyMemoryManager(); | |
63 } | |
64 | |
65 GCMemoryManager* MemoryManager::get_msc_memory_manager() { | |
66 return (GCMemoryManager*) new MSCMemoryManager(); | |
67 } | |
68 | |
69 GCMemoryManager* MemoryManager::get_parnew_memory_manager() { | |
70 return (GCMemoryManager*) new ParNewMemoryManager(); | |
71 } | |
72 | |
73 GCMemoryManager* MemoryManager::get_cms_memory_manager() { | |
74 return (GCMemoryManager*) new CMSMemoryManager(); | |
75 } | |
76 | |
77 GCMemoryManager* MemoryManager::get_psScavenge_memory_manager() { | |
78 return (GCMemoryManager*) new PSScavengeMemoryManager(); | |
79 } | |
80 | |
81 GCMemoryManager* MemoryManager::get_psMarkSweep_memory_manager() { | |
82 return (GCMemoryManager*) new PSMarkSweepMemoryManager(); | |
83 } | |
84 | |
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85 GCMemoryManager* MemoryManager::get_g1YoungGen_memory_manager() { |
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86 return (GCMemoryManager*) new G1YoungGenMemoryManager(); |
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87 } |
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88 |
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89 GCMemoryManager* MemoryManager::get_g1OldGen_memory_manager() { |
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90 return (GCMemoryManager*) new G1OldGenMemoryManager(); |
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91 } |
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92 |
0 | 93 instanceOop MemoryManager::get_memory_manager_instance(TRAPS) { |
94 // Must do an acquire so as to force ordering of subsequent | |
95 // loads from anything _memory_mgr_obj points to or implies. | |
96 instanceOop mgr_obj = (instanceOop)OrderAccess::load_ptr_acquire(&_memory_mgr_obj); | |
97 if (mgr_obj == NULL) { | |
98 // It's ok for more than one thread to execute the code up to the locked region. | |
99 // Extra manager instances will just be gc'ed. | |
100 klassOop k = Management::sun_management_ManagementFactory_klass(CHECK_0); | |
101 instanceKlassHandle ik(THREAD, k); | |
102 | |
103 Handle mgr_name = java_lang_String::create_from_str(name(), CHECK_0); | |
104 | |
105 JavaValue result(T_OBJECT); | |
106 JavaCallArguments args; | |
107 args.push_oop(mgr_name); // Argument 1 | |
108 | |
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109 Symbol* method_name = NULL; |
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110 Symbol* signature = NULL; |
0 | 111 if (is_gc_memory_manager()) { |
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112 method_name = vmSymbols::createGarbageCollector_name(); |
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113 signature = vmSymbols::createGarbageCollector_signature(); |
0 | 114 args.push_oop(Handle()); // Argument 2 (for future extension) |
115 } else { | |
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116 method_name = vmSymbols::createMemoryManager_name(); |
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117 signature = vmSymbols::createMemoryManager_signature(); |
0 | 118 } |
119 | |
120 JavaCalls::call_static(&result, | |
121 ik, | |
122 method_name, | |
123 signature, | |
124 &args, | |
125 CHECK_0); | |
126 | |
127 instanceOop m = (instanceOop) result.get_jobject(); | |
128 instanceHandle mgr(THREAD, m); | |
129 | |
130 { | |
131 // Get lock before setting _memory_mgr_obj | |
132 // since another thread may have created the instance | |
133 MutexLocker ml(Management_lock); | |
134 | |
135 // Check if another thread has created the management object. We reload | |
136 // _memory_mgr_obj here because some other thread may have initialized | |
137 // it while we were executing the code before the lock. | |
138 // | |
139 // The lock has done an acquire, so the load can't float above it, but | |
140 // we need to do a load_acquire as above. | |
141 mgr_obj = (instanceOop)OrderAccess::load_ptr_acquire(&_memory_mgr_obj); | |
142 if (mgr_obj != NULL) { | |
143 return mgr_obj; | |
144 } | |
145 | |
146 // Get the address of the object we created via call_special. | |
147 mgr_obj = mgr(); | |
148 | |
149 // Use store barrier to make sure the memory accesses associated | |
150 // with creating the management object are visible before publishing | |
151 // its address. The unlock will publish the store to _memory_mgr_obj | |
152 // because it does a release first. | |
153 OrderAccess::release_store_ptr(&_memory_mgr_obj, mgr_obj); | |
154 } | |
155 } | |
156 | |
157 return mgr_obj; | |
158 } | |
159 | |
160 void MemoryManager::oops_do(OopClosure* f) { | |
161 f->do_oop((oop*) &_memory_mgr_obj); | |
162 } | |
163 | |
164 GCStatInfo::GCStatInfo(int num_pools) { | |
165 // initialize the arrays for memory usage | |
166 _before_gc_usage_array = (MemoryUsage*) NEW_C_HEAP_ARRAY(MemoryUsage, num_pools); | |
167 _after_gc_usage_array = (MemoryUsage*) NEW_C_HEAP_ARRAY(MemoryUsage, num_pools); | |
168 size_t len = num_pools * sizeof(MemoryUsage); | |
169 memset(_before_gc_usage_array, 0, len); | |
170 memset(_after_gc_usage_array, 0, len); | |
171 _usage_array_size = num_pools; | |
172 } | |
173 | |
174 GCStatInfo::~GCStatInfo() { | |
175 FREE_C_HEAP_ARRAY(MemoryUsage*, _before_gc_usage_array); | |
176 FREE_C_HEAP_ARRAY(MemoryUsage*, _after_gc_usage_array); | |
177 } | |
178 | |
179 void GCStatInfo::set_gc_usage(int pool_index, MemoryUsage usage, bool before_gc) { | |
180 MemoryUsage* gc_usage_array; | |
181 if (before_gc) { | |
182 gc_usage_array = _before_gc_usage_array; | |
183 } else { | |
184 gc_usage_array = _after_gc_usage_array; | |
185 } | |
186 gc_usage_array[pool_index] = usage; | |
187 } | |
188 | |
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189 void GCStatInfo::clear() { |
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190 _index = 0; |
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191 _start_time = 0L; |
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192 _end_time = 0L; |
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193 size_t len = _usage_array_size * sizeof(MemoryUsage); |
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194 memset(_before_gc_usage_array, 0, len); |
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195 memset(_after_gc_usage_array, 0, len); |
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196 } |
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197 |
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198 |
0 | 199 GCMemoryManager::GCMemoryManager() : MemoryManager() { |
200 _num_collections = 0; | |
201 _last_gc_stat = NULL; | |
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202 _last_gc_lock = new Mutex(Mutex::leaf, "_last_gc_lock", true); |
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203 _current_gc_stat = NULL; |
0 | 204 _num_gc_threads = 1; |
205 } | |
206 | |
207 GCMemoryManager::~GCMemoryManager() { | |
208 delete _last_gc_stat; | |
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209 delete _last_gc_lock; |
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210 delete _current_gc_stat; |
0 | 211 } |
212 | |
213 void GCMemoryManager::initialize_gc_stat_info() { | |
214 assert(MemoryService::num_memory_pools() > 0, "should have one or more memory pools"); | |
215 _last_gc_stat = new GCStatInfo(MemoryService::num_memory_pools()); | |
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216 _current_gc_stat = new GCStatInfo(MemoryService::num_memory_pools()); |
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217 // tracking concurrent collections we need two objects: one to update, and one to |
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218 // hold the publicly available "last (completed) gc" information. |
0 | 219 } |
220 | |
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221 void GCMemoryManager::gc_begin(bool recordGCBeginTime, bool recordPreGCUsage, |
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222 bool recordAccumulatedGCTime) { |
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223 assert(_last_gc_stat != NULL && _current_gc_stat != NULL, "Just checking"); |
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224 if (recordAccumulatedGCTime) { |
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225 _accumulated_timer.start(); |
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226 } |
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227 // _num_collections now increases in gc_end, to count completed collections |
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228 if (recordGCBeginTime) { |
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229 _current_gc_stat->set_index(_num_collections+1); |
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230 _current_gc_stat->set_start_time(Management::timestamp()); |
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231 } |
0 | 232 |
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233 if (recordPreGCUsage) { |
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234 // Keep memory usage of all memory pools |
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235 for (int i = 0; i < MemoryService::num_memory_pools(); i++) { |
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236 MemoryPool* pool = MemoryService::get_memory_pool(i); |
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237 MemoryUsage usage = pool->get_memory_usage(); |
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238 _current_gc_stat->set_before_gc_usage(i, usage); |
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239 HS_DTRACE_PROBE8(hotspot, mem__pool__gc__begin, |
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240 name(), strlen(name()), |
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241 pool->name(), strlen(pool->name()), |
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242 usage.init_size(), usage.used(), |
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243 usage.committed(), usage.max_size()); |
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244 } |
0 | 245 } |
246 } | |
247 | |
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248 // A collector MUST, even if it does not complete for some reason, |
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249 // make a TraceMemoryManagerStats object where countCollection is true, |
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250 // to ensure the current gc stat is placed in _last_gc_stat. |
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251 void GCMemoryManager::gc_end(bool recordPostGCUsage, |
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252 bool recordAccumulatedGCTime, |
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253 bool recordGCEndTime, bool countCollection) { |
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254 if (recordAccumulatedGCTime) { |
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255 _accumulated_timer.stop(); |
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256 } |
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257 if (recordGCEndTime) { |
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258 _current_gc_stat->set_end_time(Management::timestamp()); |
0 | 259 } |
260 | |
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261 if (recordPostGCUsage) { |
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262 int i; |
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263 // keep the last gc statistics for all memory pools |
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264 for (i = 0; i < MemoryService::num_memory_pools(); i++) { |
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265 MemoryPool* pool = MemoryService::get_memory_pool(i); |
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266 MemoryUsage usage = pool->get_memory_usage(); |
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267 |
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268 HS_DTRACE_PROBE8(hotspot, mem__pool__gc__end, |
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269 name(), strlen(name()), |
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270 pool->name(), strlen(pool->name()), |
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271 usage.init_size(), usage.used(), |
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272 usage.committed(), usage.max_size()); |
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273 |
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274 _current_gc_stat->set_after_gc_usage(i, usage); |
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275 } |
0 | 276 |
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277 // Set last collection usage of the memory pools managed by this collector |
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278 for (i = 0; i < num_memory_pools(); i++) { |
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279 MemoryPool* pool = get_memory_pool(i); |
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280 MemoryUsage usage = pool->get_memory_usage(); |
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281 |
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282 // Compare with GC usage threshold |
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283 pool->set_last_collection_usage(usage); |
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284 LowMemoryDetector::detect_after_gc_memory(pool); |
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285 } |
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286 } |
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287 if (countCollection) { |
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288 _num_collections++; |
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289 // alternately update two objects making one public when complete |
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290 { |
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291 MutexLockerEx ml(_last_gc_lock, Mutex::_no_safepoint_check_flag); |
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292 GCStatInfo *tmp = _last_gc_stat; |
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293 _last_gc_stat = _current_gc_stat; |
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294 _current_gc_stat = tmp; |
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295 // reset the current stat for diagnosability purposes |
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296 _current_gc_stat->clear(); |
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297 } |
0 | 298 } |
299 } | |
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300 |
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301 size_t GCMemoryManager::get_last_gc_stat(GCStatInfo* dest) { |
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302 MutexLockerEx ml(_last_gc_lock, Mutex::_no_safepoint_check_flag); |
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303 if (_last_gc_stat->gc_index() != 0) { |
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304 dest->set_index(_last_gc_stat->gc_index()); |
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305 dest->set_start_time(_last_gc_stat->start_time()); |
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306 dest->set_end_time(_last_gc_stat->end_time()); |
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307 assert(dest->usage_array_size() == _last_gc_stat->usage_array_size(), |
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308 "Must have same array size"); |
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309 size_t len = dest->usage_array_size() * sizeof(MemoryUsage); |
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310 memcpy(dest->before_gc_usage_array(), _last_gc_stat->before_gc_usage_array(), len); |
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311 memcpy(dest->after_gc_usage_array(), _last_gc_stat->after_gc_usage_array(), len); |
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312 } |
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313 return _last_gc_stat->gc_index(); |
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314 } |