Mercurial > hg > truffle
annotate src/share/vm/services/memoryManager.cpp @ 18487:0f4813e0b4a9
Use asConstant() instead of asJavaConstant() where possible.
author | Roland Schatz <roland.schatz@oracle.com> |
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date | Mon, 24 Nov 2014 12:13:31 +0100 |
parents | 4ca6dc0799b6 |
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" | |
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 |
14909 | 39 #ifndef USDT2 |
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); | |
44 #endif /* !USDT2 */ | |
45 | |
0 | 46 MemoryManager::MemoryManager() { |
47 _num_pools = 0; | |
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48 (void)const_cast<instanceOop&>(_memory_mgr_obj = NULL); |
0 | 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 | |
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64 MemoryManager* MemoryManager::get_metaspace_memory_manager() { |
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65 return (MemoryManager*) new MetaspaceMemoryManager(); |
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66 } |
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67 |
0 | 68 GCMemoryManager* MemoryManager::get_copy_memory_manager() { |
69 return (GCMemoryManager*) new CopyMemoryManager(); | |
70 } | |
71 | |
72 GCMemoryManager* MemoryManager::get_msc_memory_manager() { | |
73 return (GCMemoryManager*) new MSCMemoryManager(); | |
74 } | |
75 | |
76 GCMemoryManager* MemoryManager::get_parnew_memory_manager() { | |
77 return (GCMemoryManager*) new ParNewMemoryManager(); | |
78 } | |
79 | |
80 GCMemoryManager* MemoryManager::get_cms_memory_manager() { | |
81 return (GCMemoryManager*) new CMSMemoryManager(); | |
82 } | |
83 | |
84 GCMemoryManager* MemoryManager::get_psScavenge_memory_manager() { | |
85 return (GCMemoryManager*) new PSScavengeMemoryManager(); | |
86 } | |
87 | |
88 GCMemoryManager* MemoryManager::get_psMarkSweep_memory_manager() { | |
89 return (GCMemoryManager*) new PSMarkSweepMemoryManager(); | |
90 } | |
91 | |
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92 GCMemoryManager* MemoryManager::get_g1YoungGen_memory_manager() { |
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93 return (GCMemoryManager*) new G1YoungGenMemoryManager(); |
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94 } |
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95 |
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96 GCMemoryManager* MemoryManager::get_g1OldGen_memory_manager() { |
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97 return (GCMemoryManager*) new G1OldGenMemoryManager(); |
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98 } |
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99 |
0 | 100 instanceOop MemoryManager::get_memory_manager_instance(TRAPS) { |
101 // Must do an acquire so as to force ordering of subsequent | |
102 // loads from anything _memory_mgr_obj points to or implies. | |
103 instanceOop mgr_obj = (instanceOop)OrderAccess::load_ptr_acquire(&_memory_mgr_obj); | |
104 if (mgr_obj == NULL) { | |
105 // It's ok for more than one thread to execute the code up to the locked region. | |
106 // Extra manager instances will just be gc'ed. | |
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107 Klass* k = Management::sun_management_ManagementFactory_klass(CHECK_0); |
0 | 108 instanceKlassHandle ik(THREAD, k); |
109 | |
110 Handle mgr_name = java_lang_String::create_from_str(name(), CHECK_0); | |
111 | |
112 JavaValue result(T_OBJECT); | |
113 JavaCallArguments args; | |
114 args.push_oop(mgr_name); // Argument 1 | |
115 | |
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116 Symbol* method_name = NULL; |
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117 Symbol* signature = NULL; |
0 | 118 if (is_gc_memory_manager()) { |
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119 method_name = vmSymbols::createGarbageCollector_name(); |
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120 signature = vmSymbols::createGarbageCollector_signature(); |
0 | 121 args.push_oop(Handle()); // Argument 2 (for future extension) |
122 } else { | |
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123 method_name = vmSymbols::createMemoryManager_name(); |
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124 signature = vmSymbols::createMemoryManager_signature(); |
0 | 125 } |
126 | |
127 JavaCalls::call_static(&result, | |
128 ik, | |
129 method_name, | |
130 signature, | |
131 &args, | |
132 CHECK_0); | |
133 | |
134 instanceOop m = (instanceOop) result.get_jobject(); | |
135 instanceHandle mgr(THREAD, m); | |
136 | |
137 { | |
138 // Get lock before setting _memory_mgr_obj | |
139 // since another thread may have created the instance | |
140 MutexLocker ml(Management_lock); | |
141 | |
142 // Check if another thread has created the management object. We reload | |
143 // _memory_mgr_obj here because some other thread may have initialized | |
144 // it while we were executing the code before the lock. | |
145 // | |
146 // The lock has done an acquire, so the load can't float above it, but | |
147 // we need to do a load_acquire as above. | |
148 mgr_obj = (instanceOop)OrderAccess::load_ptr_acquire(&_memory_mgr_obj); | |
149 if (mgr_obj != NULL) { | |
150 return mgr_obj; | |
151 } | |
152 | |
153 // Get the address of the object we created via call_special. | |
154 mgr_obj = mgr(); | |
155 | |
156 // Use store barrier to make sure the memory accesses associated | |
157 // with creating the management object are visible before publishing | |
158 // its address. The unlock will publish the store to _memory_mgr_obj | |
159 // because it does a release first. | |
160 OrderAccess::release_store_ptr(&_memory_mgr_obj, mgr_obj); | |
161 } | |
162 } | |
163 | |
164 return mgr_obj; | |
165 } | |
166 | |
167 void MemoryManager::oops_do(OopClosure* f) { | |
168 f->do_oop((oop*) &_memory_mgr_obj); | |
169 } | |
170 | |
171 GCStatInfo::GCStatInfo(int num_pools) { | |
172 // initialize the arrays for memory usage | |
6197 | 173 _before_gc_usage_array = (MemoryUsage*) NEW_C_HEAP_ARRAY(MemoryUsage, num_pools, mtInternal); |
174 _after_gc_usage_array = (MemoryUsage*) NEW_C_HEAP_ARRAY(MemoryUsage, num_pools, mtInternal); | |
0 | 175 _usage_array_size = num_pools; |
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176 clear(); |
0 | 177 } |
178 | |
179 GCStatInfo::~GCStatInfo() { | |
6197 | 180 FREE_C_HEAP_ARRAY(MemoryUsage*, _before_gc_usage_array, mtInternal); |
181 FREE_C_HEAP_ARRAY(MemoryUsage*, _after_gc_usage_array, mtInternal); | |
0 | 182 } |
183 | |
184 void GCStatInfo::set_gc_usage(int pool_index, MemoryUsage usage, bool before_gc) { | |
185 MemoryUsage* gc_usage_array; | |
186 if (before_gc) { | |
187 gc_usage_array = _before_gc_usage_array; | |
188 } else { | |
189 gc_usage_array = _after_gc_usage_array; | |
190 } | |
191 gc_usage_array[pool_index] = usage; | |
192 } | |
193 | |
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194 void GCStatInfo::clear() { |
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195 _index = 0; |
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196 _start_time = 0L; |
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197 _end_time = 0L; |
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198 size_t len = _usage_array_size * sizeof(MemoryUsage); |
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199 memset(_before_gc_usage_array, 0, len); |
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200 memset(_after_gc_usage_array, 0, len); |
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201 } |
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202 |
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203 |
0 | 204 GCMemoryManager::GCMemoryManager() : MemoryManager() { |
205 _num_collections = 0; | |
206 _last_gc_stat = NULL; | |
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207 _last_gc_lock = new Mutex(Mutex::leaf, "_last_gc_lock", true); |
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208 _current_gc_stat = NULL; |
0 | 209 _num_gc_threads = 1; |
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210 _notification_enabled = false; |
0 | 211 } |
212 | |
213 GCMemoryManager::~GCMemoryManager() { | |
214 delete _last_gc_stat; | |
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215 delete _last_gc_lock; |
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216 delete _current_gc_stat; |
0 | 217 } |
218 | |
219 void GCMemoryManager::initialize_gc_stat_info() { | |
220 assert(MemoryService::num_memory_pools() > 0, "should have one or more memory pools"); | |
6197 | 221 _last_gc_stat = new(ResourceObj::C_HEAP, mtGC) GCStatInfo(MemoryService::num_memory_pools()); |
222 _current_gc_stat = new(ResourceObj::C_HEAP, mtGC) GCStatInfo(MemoryService::num_memory_pools()); | |
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223 // tracking concurrent collections we need two objects: one to update, and one to |
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224 // hold the publicly available "last (completed) gc" information. |
0 | 225 } |
226 | |
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227 void GCMemoryManager::gc_begin(bool recordGCBeginTime, bool recordPreGCUsage, |
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228 bool recordAccumulatedGCTime) { |
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229 assert(_last_gc_stat != NULL && _current_gc_stat != NULL, "Just checking"); |
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230 if (recordAccumulatedGCTime) { |
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231 _accumulated_timer.start(); |
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232 } |
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233 // _num_collections now increases in gc_end, to count completed collections |
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234 if (recordGCBeginTime) { |
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235 _current_gc_stat->set_index(_num_collections+1); |
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236 _current_gc_stat->set_start_time(Management::timestamp()); |
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237 } |
0 | 238 |
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239 if (recordPreGCUsage) { |
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240 // Keep memory usage of all memory pools |
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241 for (int i = 0; i < MemoryService::num_memory_pools(); i++) { |
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242 MemoryPool* pool = MemoryService::get_memory_pool(i); |
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243 MemoryUsage usage = pool->get_memory_usage(); |
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244 _current_gc_stat->set_before_gc_usage(i, usage); |
14909 | 245 #ifndef USDT2 |
246 HS_DTRACE_PROBE8(hotspot, mem__pool__gc__begin, | |
247 name(), strlen(name()), | |
248 pool->name(), strlen(pool->name()), | |
249 usage.init_size(), usage.used(), | |
250 usage.committed(), usage.max_size()); | |
251 #else /* USDT2 */ | |
4006 | 252 HOTSPOT_MEM_POOL_GC_BEGIN( |
253 (char *) name(), strlen(name()), | |
254 (char *) pool->name(), strlen(pool->name()), | |
255 usage.init_size(), usage.used(), | |
256 usage.committed(), usage.max_size()); | |
14909 | 257 #endif /* USDT2 */ |
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258 } |
0 | 259 } |
260 } | |
261 | |
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262 // A collector MUST, even if it does not complete for some reason, |
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263 // make a TraceMemoryManagerStats object where countCollection is true, |
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264 // to ensure the current gc stat is placed in _last_gc_stat. |
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265 void GCMemoryManager::gc_end(bool recordPostGCUsage, |
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266 bool recordAccumulatedGCTime, |
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267 bool recordGCEndTime, bool countCollection, |
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268 GCCause::Cause cause) { |
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269 if (recordAccumulatedGCTime) { |
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270 _accumulated_timer.stop(); |
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271 } |
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272 if (recordGCEndTime) { |
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273 _current_gc_stat->set_end_time(Management::timestamp()); |
0 | 274 } |
275 | |
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276 if (recordPostGCUsage) { |
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277 int i; |
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278 // keep the last gc statistics for all memory pools |
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279 for (i = 0; i < MemoryService::num_memory_pools(); i++) { |
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280 MemoryPool* pool = MemoryService::get_memory_pool(i); |
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281 MemoryUsage usage = pool->get_memory_usage(); |
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282 |
14909 | 283 #ifndef USDT2 |
284 HS_DTRACE_PROBE8(hotspot, mem__pool__gc__end, | |
285 name(), strlen(name()), | |
286 pool->name(), strlen(pool->name()), | |
287 usage.init_size(), usage.used(), | |
288 usage.committed(), usage.max_size()); | |
289 #else /* USDT2 */ | |
4006 | 290 HOTSPOT_MEM_POOL_GC_END( |
291 (char *) name(), strlen(name()), | |
292 (char *) pool->name(), strlen(pool->name()), | |
293 usage.init_size(), usage.used(), | |
294 usage.committed(), usage.max_size()); | |
14909 | 295 #endif /* USDT2 */ |
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296 |
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297 _current_gc_stat->set_after_gc_usage(i, usage); |
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298 } |
0 | 299 |
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300 // Set last collection usage of the memory pools managed by this collector |
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301 for (i = 0; i < num_memory_pools(); i++) { |
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302 MemoryPool* pool = get_memory_pool(i); |
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303 MemoryUsage usage = pool->get_memory_usage(); |
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304 |
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305 // Compare with GC usage threshold |
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306 pool->set_last_collection_usage(usage); |
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307 LowMemoryDetector::detect_after_gc_memory(pool); |
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308 } |
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309 } |
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310 |
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311 if (countCollection) { |
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312 _num_collections++; |
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313 // alternately update two objects making one public when complete |
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314 { |
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315 MutexLockerEx ml(_last_gc_lock, Mutex::_no_safepoint_check_flag); |
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316 GCStatInfo *tmp = _last_gc_stat; |
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317 _last_gc_stat = _current_gc_stat; |
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318 _current_gc_stat = tmp; |
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319 // reset the current stat for diagnosability purposes |
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320 _current_gc_stat->clear(); |
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321 } |
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322 |
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323 if (is_notification_enabled()) { |
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324 bool isMajorGC = this == MemoryService::get_major_gc_manager(); |
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325 GCNotifier::pushNotification(this, isMajorGC ? "end of major GC" : "end of minor GC", |
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326 GCCause::to_string(cause)); |
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327 } |
0 | 328 } |
329 } | |
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330 |
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331 size_t GCMemoryManager::get_last_gc_stat(GCStatInfo* dest) { |
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332 MutexLockerEx ml(_last_gc_lock, Mutex::_no_safepoint_check_flag); |
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333 if (_last_gc_stat->gc_index() != 0) { |
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334 dest->set_index(_last_gc_stat->gc_index()); |
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335 dest->set_start_time(_last_gc_stat->start_time()); |
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336 dest->set_end_time(_last_gc_stat->end_time()); |
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337 assert(dest->usage_array_size() == _last_gc_stat->usage_array_size(), |
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338 "Must have same array size"); |
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339 size_t len = dest->usage_array_size() * sizeof(MemoryUsage); |
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340 memcpy(dest->before_gc_usage_array(), _last_gc_stat->before_gc_usage_array(), len); |
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341 memcpy(dest->after_gc_usage_array(), _last_gc_stat->after_gc_usage_array(), len); |
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342 } |
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343 return _last_gc_stat->gc_index(); |
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344 } |