memoryService.cpp revision 0:a61af66fc99e
1/* 2 * Copyright 2003-2006 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/_memoryService.cpp.incl" 27 28GrowableArray<MemoryPool*>* MemoryService::_pools_list = 29 new (ResourceObj::C_HEAP) GrowableArray<MemoryPool*>(init_pools_list_size, true); 30GrowableArray<MemoryManager*>* MemoryService::_managers_list = 31 new (ResourceObj::C_HEAP) GrowableArray<MemoryManager*>(init_managers_list_size, true); 32 33GCMemoryManager* MemoryService::_minor_gc_manager = NULL; 34GCMemoryManager* MemoryService::_major_gc_manager = NULL; 35MemoryPool* MemoryService::_code_heap_pool = NULL; 36 37class GcThreadCountClosure: public ThreadClosure { 38 private: 39 int _count; 40 public: 41 GcThreadCountClosure() : _count(0) {}; 42 void do_thread(Thread* thread); 43 int count() { return _count; } 44}; 45 46void GcThreadCountClosure::do_thread(Thread* thread) { 47 _count++; 48} 49 50void MemoryService::set_universe_heap(CollectedHeap* heap) { 51 CollectedHeap::Name kind = heap->kind(); 52 switch (kind) { 53 case CollectedHeap::GenCollectedHeap : { 54 add_gen_collected_heap_info(GenCollectedHeap::heap()); 55 break; 56 } 57#ifndef SERIALGC 58 case CollectedHeap::ParallelScavengeHeap : { 59 add_parallel_scavenge_heap_info(ParallelScavengeHeap::heap()); 60 break; 61 } 62#endif // SERIALGC 63 default: { 64 guarantee(false, "Not recognized kind of heap"); 65 } 66 } 67 68 // set the GC thread count 69 GcThreadCountClosure gctcc; 70 heap->gc_threads_do(&gctcc); 71 int count = gctcc.count(); 72 if (count > 0) { 73 _minor_gc_manager->set_num_gc_threads(count); 74 _major_gc_manager->set_num_gc_threads(count); 75 } 76 77 // All memory pools and memory managers are initialized. 78 // 79 _minor_gc_manager->initialize_gc_stat_info(); 80 _major_gc_manager->initialize_gc_stat_info(); 81} 82 83// Add memory pools for GenCollectedHeap 84// This function currently only supports two generations collected heap. 85// The collector for GenCollectedHeap will have two memory managers. 86void MemoryService::add_gen_collected_heap_info(GenCollectedHeap* heap) { 87 CollectorPolicy* policy = heap->collector_policy(); 88 89 assert(policy->is_two_generation_policy(), "Only support two generations"); 90 guarantee(heap->n_gens() == 2, "Only support two-generation heap"); 91 92 TwoGenerationCollectorPolicy* two_gen_policy = policy->as_two_generation_policy(); 93 if (two_gen_policy != NULL) { 94 GenerationSpec** specs = two_gen_policy->generations(); 95 Generation::Name kind = specs[0]->name(); 96 switch (kind) { 97 case Generation::DefNew: 98 _minor_gc_manager = MemoryManager::get_copy_memory_manager(); 99 break; 100#ifndef SERIALGC 101 case Generation::ParNew: 102 case Generation::ASParNew: 103 _minor_gc_manager = MemoryManager::get_parnew_memory_manager(); 104 break; 105#endif // SERIALGC 106 default: 107 guarantee(false, "Unrecognized generation spec"); 108 break; 109 } 110 if (policy->is_mark_sweep_policy()) { 111 _major_gc_manager = MemoryManager::get_msc_memory_manager(); 112#ifndef SERIALGC 113 } else if (policy->is_concurrent_mark_sweep_policy()) { 114 _major_gc_manager = MemoryManager::get_cms_memory_manager(); 115#endif // SERIALGC 116 } else { 117 guarantee(false, "Unknown two-gen policy"); 118 } 119 } else { 120 guarantee(false, "Non two-gen policy"); 121 } 122 _managers_list->append(_minor_gc_manager); 123 _managers_list->append(_major_gc_manager); 124 125 add_generation_memory_pool(heap->get_gen(minor), _major_gc_manager, _minor_gc_manager); 126 add_generation_memory_pool(heap->get_gen(major), _major_gc_manager); 127 128 PermGen::Name name = policy->permanent_generation()->name(); 129 switch (name) { 130 case PermGen::MarkSweepCompact: { 131 CompactingPermGenGen* perm_gen = (CompactingPermGenGen*) heap->perm_gen(); 132 add_compact_perm_gen_memory_pool(perm_gen, _major_gc_manager); 133 break; 134 } 135#ifndef SERIALGC 136 case PermGen::ConcurrentMarkSweep: { 137 CMSPermGenGen* cms_gen = (CMSPermGenGen*) heap->perm_gen(); 138 add_cms_perm_gen_memory_pool(cms_gen, _major_gc_manager); 139 break; 140 } 141#endif // SERIALGC 142 default: 143 guarantee(false, "Unrecognized perm generation"); 144 break; 145 } 146} 147 148#ifndef SERIALGC 149// Add memory pools for ParallelScavengeHeap 150// This function currently only supports two generations collected heap. 151// The collector for ParallelScavengeHeap will have two memory managers. 152void MemoryService::add_parallel_scavenge_heap_info(ParallelScavengeHeap* heap) { 153 // Two managers to keep statistics about _minor_gc_manager and _major_gc_manager GC. 154 _minor_gc_manager = MemoryManager::get_psScavenge_memory_manager(); 155 _major_gc_manager = MemoryManager::get_psMarkSweep_memory_manager(); 156 _managers_list->append(_minor_gc_manager); 157 _managers_list->append(_major_gc_manager); 158 159 add_psYoung_memory_pool(heap->young_gen(), _major_gc_manager, _minor_gc_manager); 160 add_psOld_memory_pool(heap->old_gen(), _major_gc_manager); 161 add_psPerm_memory_pool(heap->perm_gen(), _major_gc_manager); 162} 163#endif // SERIALGC 164 165MemoryPool* MemoryService::add_gen(Generation* gen, 166 const char* name, 167 bool is_heap, 168 bool support_usage_threshold) { 169 170 MemoryPool::PoolType type = (is_heap ? MemoryPool::Heap : MemoryPool::NonHeap); 171 GenerationPool* pool = new GenerationPool(gen, name, type, support_usage_threshold); 172 _pools_list->append(pool); 173 return (MemoryPool*) pool; 174} 175 176MemoryPool* MemoryService::add_space(ContiguousSpace* space, 177 const char* name, 178 bool is_heap, 179 size_t max_size, 180 bool support_usage_threshold) { 181 MemoryPool::PoolType type = (is_heap ? MemoryPool::Heap : MemoryPool::NonHeap); 182 ContiguousSpacePool* pool = new ContiguousSpacePool(space, name, type, max_size, support_usage_threshold); 183 184 _pools_list->append(pool); 185 return (MemoryPool*) pool; 186} 187 188MemoryPool* MemoryService::add_survivor_spaces(DefNewGeneration* gen, 189 const char* name, 190 bool is_heap, 191 size_t max_size, 192 bool support_usage_threshold) { 193 MemoryPool::PoolType type = (is_heap ? MemoryPool::Heap : MemoryPool::NonHeap); 194 SurvivorContiguousSpacePool* pool = new SurvivorContiguousSpacePool(gen, name, type, max_size, support_usage_threshold); 195 196 _pools_list->append(pool); 197 return (MemoryPool*) pool; 198} 199 200#ifndef SERIALGC 201MemoryPool* MemoryService::add_cms_space(CompactibleFreeListSpace* space, 202 const char* name, 203 bool is_heap, 204 size_t max_size, 205 bool support_usage_threshold) { 206 MemoryPool::PoolType type = (is_heap ? MemoryPool::Heap : MemoryPool::NonHeap); 207 CompactibleFreeListSpacePool* pool = new CompactibleFreeListSpacePool(space, name, type, max_size, support_usage_threshold); 208 _pools_list->append(pool); 209 return (MemoryPool*) pool; 210} 211#endif // SERIALGC 212 213// Add memory pool(s) for one generation 214void MemoryService::add_generation_memory_pool(Generation* gen, 215 MemoryManager* major_mgr, 216 MemoryManager* minor_mgr) { 217 Generation::Name kind = gen->kind(); 218 int index = _pools_list->length(); 219 220 switch (kind) { 221 case Generation::DefNew: { 222 assert(major_mgr != NULL && minor_mgr != NULL, "Should have two managers"); 223 DefNewGeneration* young_gen = (DefNewGeneration*) gen; 224 // Add a memory pool for each space and young gen doesn't 225 // support low memory detection as it is expected to get filled up. 226 MemoryPool* eden = add_space(young_gen->eden(), 227 "Eden Space", 228 true, /* is_heap */ 229 young_gen->max_eden_size(), 230 false /* support_usage_threshold */); 231 MemoryPool* survivor = add_survivor_spaces(young_gen, 232 "Survivor Space", 233 true, /* is_heap */ 234 young_gen->max_survivor_size(), 235 false /* support_usage_threshold */); 236 break; 237 } 238 239#ifndef SERIALGC 240 case Generation::ParNew: 241 case Generation::ASParNew: 242 { 243 assert(major_mgr != NULL && minor_mgr != NULL, "Should have two managers"); 244 // Add a memory pool for each space and young gen doesn't 245 // support low memory detection as it is expected to get filled up. 246 ParNewGeneration* parnew_gen = (ParNewGeneration*) gen; 247 MemoryPool* eden = add_space(parnew_gen->eden(), 248 "Par Eden Space", 249 true /* is_heap */, 250 parnew_gen->max_eden_size(), 251 false /* support_usage_threshold */); 252 MemoryPool* survivor = add_survivor_spaces(parnew_gen, 253 "Par Survivor Space", 254 true, /* is_heap */ 255 parnew_gen->max_survivor_size(), 256 false /* support_usage_threshold */); 257 258 break; 259 } 260#endif // SERIALGC 261 262 case Generation::MarkSweepCompact: { 263 assert(major_mgr != NULL && minor_mgr == NULL, "Should have only one manager"); 264 add_gen(gen, 265 "Tenured Gen", 266 true, /* is_heap */ 267 true /* support_usage_threshold */); 268 break; 269 } 270 271#ifndef SERIALGC 272 case Generation::ConcurrentMarkSweep: 273 case Generation::ASConcurrentMarkSweep: 274 { 275 assert(major_mgr != NULL && minor_mgr == NULL, "Should have only one manager"); 276 ConcurrentMarkSweepGeneration* cms = (ConcurrentMarkSweepGeneration*) gen; 277 MemoryPool* pool = add_cms_space(cms->cmsSpace(), 278 "CMS Old Gen", 279 true, /* is_heap */ 280 cms->reserved().byte_size(), 281 true /* support_usage_threshold */); 282 break; 283 } 284#endif // SERIALGC 285 286 default: 287 assert(false, "should not reach here"); 288 // no memory pool added for others 289 break; 290 } 291 292 assert(major_mgr != NULL, "Should have at least one manager"); 293 // Link managers and the memory pools together 294 for (int i = index; i < _pools_list->length(); i++) { 295 MemoryPool* pool = _pools_list->at(i); 296 major_mgr->add_pool(pool); 297 if (minor_mgr != NULL) { 298 minor_mgr->add_pool(pool); 299 } 300 } 301} 302 303void MemoryService::add_compact_perm_gen_memory_pool(CompactingPermGenGen* perm_gen, 304 MemoryManager* mgr) { 305 PermanentGenerationSpec* spec = perm_gen->spec(); 306 size_t max_size = spec->max_size() - spec->read_only_size() - spec->read_write_size(); 307 MemoryPool* pool = add_space(perm_gen->unshared_space(), 308 "Perm Gen", 309 false, /* is_heap */ 310 max_size, 311 true /* support_usage_threshold */); 312 mgr->add_pool(pool); 313 if (UseSharedSpaces) { 314 pool = add_space(perm_gen->ro_space(), 315 "Perm Gen [shared-ro]", 316 false, /* is_heap */ 317 spec->read_only_size(), 318 true /* support_usage_threshold */); 319 mgr->add_pool(pool); 320 321 pool = add_space(perm_gen->rw_space(), 322 "Perm Gen [shared-rw]", 323 false, /* is_heap */ 324 spec->read_write_size(), 325 true /* support_usage_threshold */); 326 mgr->add_pool(pool); 327 } 328} 329 330#ifndef SERIALGC 331void MemoryService::add_cms_perm_gen_memory_pool(CMSPermGenGen* cms_gen, 332 MemoryManager* mgr) { 333 334 MemoryPool* pool = add_cms_space(cms_gen->cmsSpace(), 335 "CMS Perm Gen", 336 false, /* is_heap */ 337 cms_gen->reserved().byte_size(), 338 true /* support_usage_threshold */); 339 mgr->add_pool(pool); 340} 341 342void MemoryService::add_psYoung_memory_pool(PSYoungGen* gen, MemoryManager* major_mgr, MemoryManager* minor_mgr) { 343 assert(major_mgr != NULL && minor_mgr != NULL, "Should have two managers"); 344 345 // Add a memory pool for each space and young gen doesn't 346 // support low memory detection as it is expected to get filled up. 347 EdenMutableSpacePool* eden = new EdenMutableSpacePool(gen, 348 gen->eden_space(), 349 "PS Eden Space", 350 MemoryPool::Heap, 351 false /* support_usage_threshold */); 352 353 SurvivorMutableSpacePool* survivor = new SurvivorMutableSpacePool(gen, 354 "PS Survivor Space", 355 MemoryPool::Heap, 356 false /* support_usage_threshold */); 357 358 major_mgr->add_pool(eden); 359 major_mgr->add_pool(survivor); 360 minor_mgr->add_pool(eden); 361 minor_mgr->add_pool(survivor); 362 _pools_list->append(eden); 363 _pools_list->append(survivor); 364} 365 366void MemoryService::add_psOld_memory_pool(PSOldGen* gen, MemoryManager* mgr) { 367 PSGenerationPool* old_gen = new PSGenerationPool(gen, 368 "PS Old Gen", 369 MemoryPool::Heap, 370 true /* support_usage_threshold */); 371 mgr->add_pool(old_gen); 372 _pools_list->append(old_gen); 373} 374 375void MemoryService::add_psPerm_memory_pool(PSPermGen* gen, MemoryManager* mgr) { 376 PSGenerationPool* perm_gen = new PSGenerationPool(gen, 377 "PS Perm Gen", 378 MemoryPool::NonHeap, 379 true /* support_usage_threshold */); 380 mgr->add_pool(perm_gen); 381 _pools_list->append(perm_gen); 382} 383#endif // SERIALGC 384 385void MemoryService::add_code_heap_memory_pool(CodeHeap* heap) { 386 _code_heap_pool = new CodeHeapPool(heap, 387 "Code Cache", 388 true /* support_usage_threshold */); 389 MemoryManager* mgr = MemoryManager::get_code_cache_memory_manager(); 390 mgr->add_pool(_code_heap_pool); 391 392 _pools_list->append(_code_heap_pool); 393 _managers_list->append(mgr); 394} 395 396MemoryManager* MemoryService::get_memory_manager(instanceHandle mh) { 397 for (int i = 0; i < _managers_list->length(); i++) { 398 MemoryManager* mgr = _managers_list->at(i); 399 if (mgr->is_manager(mh)) { 400 return mgr; 401 } 402 } 403 return NULL; 404} 405 406MemoryPool* MemoryService::get_memory_pool(instanceHandle ph) { 407 for (int i = 0; i < _pools_list->length(); i++) { 408 MemoryPool* pool = _pools_list->at(i); 409 if (pool->is_pool(ph)) { 410 return pool; 411 } 412 } 413 return NULL; 414} 415 416void MemoryService::track_memory_usage() { 417 // Track the peak memory usage 418 for (int i = 0; i < _pools_list->length(); i++) { 419 MemoryPool* pool = _pools_list->at(i); 420 pool->record_peak_memory_usage(); 421 } 422 423 // Detect low memory 424 LowMemoryDetector::detect_low_memory(); 425} 426 427void MemoryService::track_memory_pool_usage(MemoryPool* pool) { 428 // Track the peak memory usage 429 pool->record_peak_memory_usage(); 430 431 // Detect low memory 432 if (LowMemoryDetector::is_enabled(pool)) { 433 LowMemoryDetector::detect_low_memory(pool); 434 } 435} 436 437void MemoryService::gc_begin(bool fullGC) { 438 GCMemoryManager* mgr; 439 if (fullGC) { 440 mgr = _major_gc_manager; 441 } else { 442 mgr = _minor_gc_manager; 443 } 444 assert(mgr->is_gc_memory_manager(), "Sanity check"); 445 mgr->gc_begin(); 446 447 // Track the peak memory usage when GC begins 448 for (int i = 0; i < _pools_list->length(); i++) { 449 MemoryPool* pool = _pools_list->at(i); 450 pool->record_peak_memory_usage(); 451 } 452} 453 454void MemoryService::gc_end(bool fullGC) { 455 GCMemoryManager* mgr; 456 if (fullGC) { 457 mgr = (GCMemoryManager*) _major_gc_manager; 458 } else { 459 mgr = (GCMemoryManager*) _minor_gc_manager; 460 } 461 assert(mgr->is_gc_memory_manager(), "Sanity check"); 462 463 // register the GC end statistics and memory usage 464 mgr->gc_end(); 465} 466 467void MemoryService::oops_do(OopClosure* f) { 468 int i; 469 470 for (i = 0; i < _pools_list->length(); i++) { 471 MemoryPool* pool = _pools_list->at(i); 472 pool->oops_do(f); 473 } 474 for (i = 0; i < _managers_list->length(); i++) { 475 MemoryManager* mgr = _managers_list->at(i); 476 mgr->oops_do(f); 477 } 478} 479 480bool MemoryService::set_verbose(bool verbose) { 481 MutexLocker m(Management_lock); 482 // verbose will be set to the previous value 483 bool succeed = CommandLineFlags::boolAtPut((char*)"PrintGC", &verbose, MANAGEMENT); 484 assert(succeed, "Setting PrintGC flag fails"); 485 ClassLoadingService::reset_trace_class_unloading(); 486 487 return verbose; 488} 489 490Handle MemoryService::create_MemoryUsage_obj(MemoryUsage usage, TRAPS) { 491 klassOop k = Management::java_lang_management_MemoryUsage_klass(CHECK_NH); 492 instanceKlassHandle ik(THREAD, k); 493 494 instanceHandle obj = ik->allocate_instance_handle(CHECK_NH); 495 496 JavaValue result(T_VOID); 497 JavaCallArguments args(10); 498 args.push_oop(obj); // receiver 499 args.push_long(usage.init_size_as_jlong()); // Argument 1 500 args.push_long(usage.used_as_jlong()); // Argument 2 501 args.push_long(usage.committed_as_jlong()); // Argument 3 502 args.push_long(usage.max_size_as_jlong()); // Argument 4 503 504 JavaCalls::call_special(&result, 505 ik, 506 vmSymbolHandles::object_initializer_name(), 507 vmSymbolHandles::long_long_long_long_void_signature(), 508 &args, 509 CHECK_NH); 510 return obj; 511} 512// 513// GC manager type depends on the type of Generation. Depending the space 514// availablity and vm option the gc uses major gc manager or minor gc 515// manager or both. The type of gc manager depends on the generation kind. 516// For DefNew, ParNew and ASParNew generation doing scavange gc uses minor 517// gc manager (so _fullGC is set to false ) and for other generation kind 518// DOing mark-sweep-compact uses major gc manager (so _fullGC is set 519// to true). 520TraceMemoryManagerStats::TraceMemoryManagerStats(Generation::Name kind) { 521 switch (kind) { 522 case Generation::DefNew: 523#ifndef SERIALGC 524 case Generation::ParNew: 525 case Generation::ASParNew: 526#endif // SERIALGC 527 _fullGC=false; 528 break; 529 case Generation::MarkSweepCompact: 530#ifndef SERIALGC 531 case Generation::ConcurrentMarkSweep: 532 case Generation::ASConcurrentMarkSweep: 533#endif // SERIALGC 534 _fullGC=true; 535 break; 536 default: 537 assert(false, "Unrecognized gc generation kind."); 538 } 539 MemoryService::gc_begin(_fullGC); 540} 541TraceMemoryManagerStats::TraceMemoryManagerStats(bool fullGC) { 542 _fullGC = fullGC; 543 MemoryService::gc_begin(_fullGC); 544} 545 546TraceMemoryManagerStats::~TraceMemoryManagerStats() { 547 MemoryService::gc_end(_fullGC); 548} 549