1 /* 2 * Copyright (c) 2003, 2012, Oracle and/or its affiliates. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25 #include "precompiled.hpp" 26 #include "classfile/systemDictionary.hpp" 27 #include "classfile/vmSymbols.hpp" 28 #include "gc_implementation/shared/mutableSpace.hpp" 29 #include "memory/collectorPolicy.hpp" 30 #include "memory/defNewGeneration.hpp" 31 #include "memory/genCollectedHeap.hpp" 32 #include "memory/generation.hpp" 33 #include "memory/generationSpec.hpp" 34 #include "memory/heap.hpp" 35 #include "memory/memRegion.hpp" 36 #include "memory/tenuredGeneration.hpp" 37 #include "oops/oop.inline.hpp" 38 #include "runtime/javaCalls.hpp" 39 #include "services/classLoadingService.hpp" 40 #include "services/lowMemoryDetector.hpp" 41 #include "services/management.hpp" 42 #include "services/memoryManager.hpp" 43 #include "services/memoryPool.hpp" 44 #include "services/memoryService.hpp" 45 #include "utilities/growableArray.hpp" 46 #include "utilities/macros.hpp" 47 #if INCLUDE_ALL_GCS 48 #include "gc_implementation/concurrentMarkSweep/concurrentMarkSweepGeneration.hpp" 49 #include "gc_implementation/g1/g1CollectedHeap.inline.hpp" 50 #include "gc_implementation/parNew/parNewGeneration.hpp" 51 #include "gc_implementation/parallelScavenge/parallelScavengeHeap.hpp" 52 #include "gc_implementation/parallelScavenge/psOldGen.hpp" 53 #include "gc_implementation/parallelScavenge/psYoungGen.hpp" 54 #include "services/g1MemoryPool.hpp" 55 #include "services/psMemoryPool.hpp" 56 #endif // INCLUDE_ALL_GCS 57 58 GrowableArray<MemoryPool*>* MemoryService::_pools_list = 59 new (ResourceObj::C_HEAP, mtInternal) GrowableArray<MemoryPool*>(init_pools_list_size, true); 60 GrowableArray<MemoryManager*>* MemoryService::_managers_list = 61 new (ResourceObj::C_HEAP, mtInternal) GrowableArray<MemoryManager*>(init_managers_list_size, true); 62 63 GCMemoryManager* MemoryService::_minor_gc_manager = NULL; 64 GCMemoryManager* MemoryService::_major_gc_manager = NULL; 65 MemoryPool* MemoryService::_code_heap_pool = NULL; 66 67 class GcThreadCountClosure: public ThreadClosure { 68 private: 69 int _count; 70 public: 71 GcThreadCountClosure() : _count(0) {}; 72 void do_thread(Thread* thread); 73 int count() { return _count; } 74 }; 75 76 void GcThreadCountClosure::do_thread(Thread* thread) { 77 _count++; 78 } 79 80 void MemoryService::set_universe_heap(CollectedHeap* heap) { 81 CollectedHeap::Name kind = heap->kind(); 82 switch (kind) { 83 case CollectedHeap::GenCollectedHeap : { 84 add_gen_collected_heap_info(GenCollectedHeap::heap()); 85 break; 86 } 87 #if INCLUDE_ALL_GCS 88 case CollectedHeap::ParallelScavengeHeap : { 89 add_parallel_scavenge_heap_info(ParallelScavengeHeap::heap()); 90 break; 91 } 92 case CollectedHeap::G1CollectedHeap : { 93 add_g1_heap_info(G1CollectedHeap::heap()); 94 break; 95 } 96 #endif // INCLUDE_ALL_GCS 97 default: { 98 guarantee(false, "Unrecognized kind of heap"); 99 } 100 } 101 102 // set the GC thread count 103 GcThreadCountClosure gctcc; 104 heap->gc_threads_do(&gctcc); 105 int count = gctcc.count(); 106 if (count > 0) { 107 _minor_gc_manager->set_num_gc_threads(count); 108 _major_gc_manager->set_num_gc_threads(count); 109 } 110 111 // All memory pools and memory managers are initialized. 112 // 113 _minor_gc_manager->initialize_gc_stat_info(); 114 _major_gc_manager->initialize_gc_stat_info(); 115 } 116 117 // Add memory pools for GenCollectedHeap 118 // This function currently only supports two generations collected heap. 119 // The collector for GenCollectedHeap will have two memory managers. 120 void MemoryService::add_gen_collected_heap_info(GenCollectedHeap* heap) { 121 CollectorPolicy* policy = heap->collector_policy(); 122 123 assert(policy->is_two_generation_policy(), "Only support two generations"); 124 guarantee(heap->n_gens() == 2, "Only support two-generation heap"); 125 126 TwoGenerationCollectorPolicy* two_gen_policy = policy->as_two_generation_policy(); 127 if (two_gen_policy != NULL) { 128 GenerationSpec** specs = two_gen_policy->generations(); 129 Generation::Name kind = specs[0]->name(); 130 switch (kind) { 131 case Generation::DefNew: 132 _minor_gc_manager = MemoryManager::get_copy_memory_manager(); 133 break; 134 #if INCLUDE_ALL_GCS 135 case Generation::ParNew: 136 case Generation::ASParNew: 137 _minor_gc_manager = MemoryManager::get_parnew_memory_manager(); 138 break; 139 #endif // INCLUDE_ALL_GCS 140 default: 141 guarantee(false, "Unrecognized generation spec"); 142 break; 143 } 144 if (policy->is_mark_sweep_policy()) { 145 _major_gc_manager = MemoryManager::get_msc_memory_manager(); 146 #if INCLUDE_ALL_GCS 147 } else if (policy->is_concurrent_mark_sweep_policy()) { 148 _major_gc_manager = MemoryManager::get_cms_memory_manager(); 149 #endif // INCLUDE_ALL_GCS 150 } else { 151 guarantee(false, "Unknown two-gen policy"); 152 } 153 } else { 154 guarantee(false, "Non two-gen policy"); 155 } 156 _managers_list->append(_minor_gc_manager); 157 _managers_list->append(_major_gc_manager); 158 159 add_generation_memory_pool(heap->get_gen(minor), _major_gc_manager, _minor_gc_manager); 160 add_generation_memory_pool(heap->get_gen(major), _major_gc_manager); 161 } 162 163 #if INCLUDE_ALL_GCS 164 // Add memory pools for ParallelScavengeHeap 165 // This function currently only supports two generations collected heap. 166 // The collector for ParallelScavengeHeap will have two memory managers. 167 void MemoryService::add_parallel_scavenge_heap_info(ParallelScavengeHeap* heap) { 168 // Two managers to keep statistics about _minor_gc_manager and _major_gc_manager GC. 169 _minor_gc_manager = MemoryManager::get_psScavenge_memory_manager(); 170 _major_gc_manager = MemoryManager::get_psMarkSweep_memory_manager(); 171 _managers_list->append(_minor_gc_manager); 172 _managers_list->append(_major_gc_manager); 173 174 add_psYoung_memory_pool(heap->young_gen(), _major_gc_manager, _minor_gc_manager); 175 add_psOld_memory_pool(heap->old_gen(), _major_gc_manager); 176 } 177 178 void MemoryService::add_g1_heap_info(G1CollectedHeap* g1h) { 179 assert(UseG1GC, "sanity"); 180 181 _minor_gc_manager = MemoryManager::get_g1YoungGen_memory_manager(); 182 _major_gc_manager = MemoryManager::get_g1OldGen_memory_manager(); 183 _managers_list->append(_minor_gc_manager); 184 _managers_list->append(_major_gc_manager); 185 186 add_g1YoungGen_memory_pool(g1h, _major_gc_manager, _minor_gc_manager); 187 add_g1OldGen_memory_pool(g1h, _major_gc_manager); 188 } 189 #endif // INCLUDE_ALL_GCS 190 191 MemoryPool* MemoryService::add_gen(Generation* gen, 192 const char* name, 193 bool is_heap, 194 bool support_usage_threshold) { 195 196 MemoryPool::PoolType type = (is_heap ? MemoryPool::Heap : MemoryPool::NonHeap); 197 GenerationPool* pool = new GenerationPool(gen, name, type, support_usage_threshold); 198 _pools_list->append(pool); 199 return (MemoryPool*) pool; 200 } 201 202 MemoryPool* MemoryService::add_space(ContiguousSpace* space, 203 const char* name, 204 bool is_heap, 205 size_t max_size, 206 bool support_usage_threshold) { 207 MemoryPool::PoolType type = (is_heap ? MemoryPool::Heap : MemoryPool::NonHeap); 208 ContiguousSpacePool* pool = new ContiguousSpacePool(space, name, type, max_size, support_usage_threshold); 209 210 _pools_list->append(pool); 211 return (MemoryPool*) pool; 212 } 213 214 MemoryPool* MemoryService::add_survivor_spaces(DefNewGeneration* gen, 215 const char* name, 216 bool is_heap, 217 size_t max_size, 218 bool support_usage_threshold) { 219 MemoryPool::PoolType type = (is_heap ? MemoryPool::Heap : MemoryPool::NonHeap); 220 SurvivorContiguousSpacePool* pool = new SurvivorContiguousSpacePool(gen, name, type, max_size, support_usage_threshold); 221 222 _pools_list->append(pool); 223 return (MemoryPool*) pool; 224 } 225 226 #if INCLUDE_ALL_GCS 227 MemoryPool* MemoryService::add_cms_space(CompactibleFreeListSpace* space, 228 const char* name, 229 bool is_heap, 230 size_t max_size, 231 bool support_usage_threshold) { 232 MemoryPool::PoolType type = (is_heap ? MemoryPool::Heap : MemoryPool::NonHeap); 233 CompactibleFreeListSpacePool* pool = new CompactibleFreeListSpacePool(space, name, type, max_size, support_usage_threshold); 234 _pools_list->append(pool); 235 return (MemoryPool*) pool; 236 } 237 #endif // INCLUDE_ALL_GCS 238 239 // Add memory pool(s) for one generation 240 void MemoryService::add_generation_memory_pool(Generation* gen, 241 MemoryManager* major_mgr, 242 MemoryManager* minor_mgr) { 243 guarantee(gen != NULL, "No generation for memory pool"); 244 Generation::Name kind = gen->kind(); 245 int index = _pools_list->length(); 246 247 switch (kind) { 248 case Generation::DefNew: { 249 assert(major_mgr != NULL && minor_mgr != NULL, "Should have two managers"); 250 DefNewGeneration* young_gen = (DefNewGeneration*) gen; 251 // Add a memory pool for each space and young gen doesn't 252 // support low memory detection as it is expected to get filled up. 253 MemoryPool* eden = add_space(young_gen->eden(), 254 "Eden Space", 255 true, /* is_heap */ 256 young_gen->max_eden_size(), 257 false /* support_usage_threshold */); 258 MemoryPool* survivor = add_survivor_spaces(young_gen, 259 "Survivor Space", 260 true, /* is_heap */ 261 young_gen->max_survivor_size(), 262 false /* support_usage_threshold */); 263 break; 264 } 265 266 #if INCLUDE_ALL_GCS 267 case Generation::ParNew: 268 case Generation::ASParNew: 269 { 270 assert(major_mgr != NULL && minor_mgr != NULL, "Should have two managers"); 271 // Add a memory pool for each space and young gen doesn't 272 // support low memory detection as it is expected to get filled up. 273 ParNewGeneration* parnew_gen = (ParNewGeneration*) gen; 274 MemoryPool* eden = add_space(parnew_gen->eden(), 275 "Par Eden Space", 276 true /* is_heap */, 277 parnew_gen->max_eden_size(), 278 false /* support_usage_threshold */); 279 MemoryPool* survivor = add_survivor_spaces(parnew_gen, 280 "Par Survivor Space", 281 true, /* is_heap */ 282 parnew_gen->max_survivor_size(), 283 false /* support_usage_threshold */); 284 285 break; 286 } 287 #endif // INCLUDE_ALL_GCS 288 289 case Generation::MarkSweepCompact: { 290 assert(major_mgr != NULL && minor_mgr == NULL, "Should have only one manager"); 291 add_gen(gen, 292 "Tenured Gen", 293 true, /* is_heap */ 294 true /* support_usage_threshold */); 295 break; 296 } 297 298 #if INCLUDE_ALL_GCS 299 case Generation::ConcurrentMarkSweep: 300 case Generation::ASConcurrentMarkSweep: 301 { 302 assert(major_mgr != NULL && minor_mgr == NULL, "Should have only one manager"); 303 ConcurrentMarkSweepGeneration* cms = (ConcurrentMarkSweepGeneration*) gen; 304 MemoryPool* pool = add_cms_space(cms->cmsSpace(), 305 "CMS Old Gen", 306 true, /* is_heap */ 307 cms->reserved().byte_size(), 308 true /* support_usage_threshold */); 309 break; 310 } 311 #endif // INCLUDE_ALL_GCS 312 313 default: 314 assert(false, "should not reach here"); 315 // no memory pool added for others 316 break; 317 } 318 319 assert(major_mgr != NULL, "Should have at least one manager"); 320 // Link managers and the memory pools together 321 for (int i = index; i < _pools_list->length(); i++) { 322 MemoryPool* pool = _pools_list->at(i); 323 major_mgr->add_pool(pool); 324 if (minor_mgr != NULL) { 325 minor_mgr->add_pool(pool); 326 } 327 } 328 } 329 330 331 #if INCLUDE_ALL_GCS 332 void MemoryService::add_psYoung_memory_pool(PSYoungGen* gen, MemoryManager* major_mgr, MemoryManager* minor_mgr) { 333 assert(major_mgr != NULL && minor_mgr != NULL, "Should have two managers"); 334 335 // Add a memory pool for each space and young gen doesn't 336 // support low memory detection as it is expected to get filled up. 337 EdenMutableSpacePool* eden = new EdenMutableSpacePool(gen, 338 gen->eden_space(), 339 "PS Eden Space", 340 MemoryPool::Heap, 341 false /* support_usage_threshold */); 342 343 SurvivorMutableSpacePool* survivor = new SurvivorMutableSpacePool(gen, 344 "PS Survivor Space", 345 MemoryPool::Heap, 346 false /* support_usage_threshold */); 347 348 major_mgr->add_pool(eden); 349 major_mgr->add_pool(survivor); 350 minor_mgr->add_pool(eden); 351 minor_mgr->add_pool(survivor); 352 _pools_list->append(eden); 353 _pools_list->append(survivor); 354 } 355 356 void MemoryService::add_psOld_memory_pool(PSOldGen* gen, MemoryManager* mgr) { 357 PSGenerationPool* old_gen = new PSGenerationPool(gen, 358 "PS Old Gen", 359 MemoryPool::Heap, 360 true /* support_usage_threshold */); 361 mgr->add_pool(old_gen); 362 _pools_list->append(old_gen); 363 } 364 365 void MemoryService::add_g1YoungGen_memory_pool(G1CollectedHeap* g1h, 366 MemoryManager* major_mgr, 367 MemoryManager* minor_mgr) { 368 assert(major_mgr != NULL && minor_mgr != NULL, "should have two managers"); 369 370 G1EdenPool* eden = new G1EdenPool(g1h); 371 G1SurvivorPool* survivor = new G1SurvivorPool(g1h); 372 373 major_mgr->add_pool(eden); 374 major_mgr->add_pool(survivor); 375 minor_mgr->add_pool(eden); 376 minor_mgr->add_pool(survivor); 377 _pools_list->append(eden); 378 _pools_list->append(survivor); 379 } 380 381 void MemoryService::add_g1OldGen_memory_pool(G1CollectedHeap* g1h, 382 MemoryManager* mgr) { 383 assert(mgr != NULL, "should have one manager"); 384 385 G1OldGenPool* old_gen = new G1OldGenPool(g1h); 386 mgr->add_pool(old_gen); 387 _pools_list->append(old_gen); 388 } 389 #endif // INCLUDE_ALL_GCS 390 391 void MemoryService::add_code_heap_memory_pool(CodeHeap* heap) { 392 _code_heap_pool = new CodeHeapPool(heap, 393 "Code Cache", 394 true /* support_usage_threshold */); 395 MemoryManager* mgr = MemoryManager::get_code_cache_memory_manager(); 396 mgr->add_pool(_code_heap_pool); 397 398 _pools_list->append(_code_heap_pool); 399 _managers_list->append(mgr); 400 } 401 402 MemoryManager* MemoryService::get_memory_manager(instanceHandle mh) { 403 for (int i = 0; i < _managers_list->length(); i++) { 404 MemoryManager* mgr = _managers_list->at(i); 405 if (mgr->is_manager(mh)) { 406 return mgr; 407 } 408 } 409 return NULL; 410 } 411 412 MemoryPool* MemoryService::get_memory_pool(instanceHandle ph) { 413 for (int i = 0; i < _pools_list->length(); i++) { 414 MemoryPool* pool = _pools_list->at(i); 415 if (pool->is_pool(ph)) { 416 return pool; 417 } 418 } 419 return NULL; 420 } 421 422 void MemoryService::track_memory_usage() { 423 // Track the peak memory usage 424 for (int i = 0; i < _pools_list->length(); i++) { 425 MemoryPool* pool = _pools_list->at(i); 426 pool->record_peak_memory_usage(); 427 } 428 429 // Detect low memory 430 LowMemoryDetector::detect_low_memory(); 431 } 432 433 void MemoryService::track_memory_pool_usage(MemoryPool* pool) { 434 // Track the peak memory usage 435 pool->record_peak_memory_usage(); 436 437 // Detect low memory 438 if (LowMemoryDetector::is_enabled(pool)) { 439 LowMemoryDetector::detect_low_memory(pool); 440 } 441 } 442 443 void MemoryService::gc_begin(bool fullGC, bool recordGCBeginTime, 444 bool recordAccumulatedGCTime, 445 bool recordPreGCUsage, bool recordPeakUsage) { 446 447 GCMemoryManager* mgr; 448 if (fullGC) { 449 mgr = _major_gc_manager; 450 } else { 451 mgr = _minor_gc_manager; 452 } 453 assert(mgr->is_gc_memory_manager(), "Sanity check"); 454 mgr->gc_begin(recordGCBeginTime, recordPreGCUsage, recordAccumulatedGCTime); 455 456 // Track the peak memory usage when GC begins 457 if (recordPeakUsage) { 458 for (int i = 0; i < _pools_list->length(); i++) { 459 MemoryPool* pool = _pools_list->at(i); 460 pool->record_peak_memory_usage(); 461 } 462 } 463 } 464 465 void MemoryService::gc_end(bool fullGC, bool recordPostGCUsage, 466 bool recordAccumulatedGCTime, 467 bool recordGCEndTime, bool countCollection, 468 GCCause::Cause cause) { 469 470 GCMemoryManager* mgr; 471 if (fullGC) { 472 mgr = (GCMemoryManager*) _major_gc_manager; 473 } else { 474 mgr = (GCMemoryManager*) _minor_gc_manager; 475 } 476 assert(mgr->is_gc_memory_manager(), "Sanity check"); 477 478 // register the GC end statistics and memory usage 479 mgr->gc_end(recordPostGCUsage, recordAccumulatedGCTime, recordGCEndTime, 480 countCollection, cause); 481 } 482 483 void MemoryService::oops_do(OopClosure* f) { 484 int i; 485 486 for (i = 0; i < _pools_list->length(); i++) { 487 MemoryPool* pool = _pools_list->at(i); 488 pool->oops_do(f); 489 } 490 for (i = 0; i < _managers_list->length(); i++) { 491 MemoryManager* mgr = _managers_list->at(i); 492 mgr->oops_do(f); 493 } 494 } 495 496 bool MemoryService::set_verbose(bool verbose) { 497 MutexLocker m(Management_lock); 498 // verbose will be set to the previous value 499 bool succeed = CommandLineFlags::boolAtPut((char*)"PrintGC", &verbose, MANAGEMENT); 500 assert(succeed, "Setting PrintGC flag fails"); 501 ClassLoadingService::reset_trace_class_unloading(); 502 503 return verbose; 504 } 505 506 Handle MemoryService::create_MemoryUsage_obj(MemoryUsage usage, TRAPS) { 507 Klass* k = Management::java_lang_management_MemoryUsage_klass(CHECK_NH); 508 instanceKlassHandle ik(THREAD, k); 509 510 instanceHandle obj = ik->allocate_instance_handle(CHECK_NH); 511 512 JavaValue result(T_VOID); 513 JavaCallArguments args(10); 514 args.push_oop(obj); // receiver 515 args.push_long(usage.init_size_as_jlong()); // Argument 1 516 args.push_long(usage.used_as_jlong()); // Argument 2 517 args.push_long(usage.committed_as_jlong()); // Argument 3 518 args.push_long(usage.max_size_as_jlong()); // Argument 4 519 520 JavaCalls::call_special(&result, 521 ik, 522 vmSymbols::object_initializer_name(), 523 vmSymbols::long_long_long_long_void_signature(), 524 &args, 525 CHECK_NH); 526 return obj; 527 } 528 // 529 // GC manager type depends on the type of Generation. Depending on the space 530 // availablity and vm options the gc uses major gc manager or minor gc 531 // manager or both. The type of gc manager depends on the generation kind. 532 // For DefNew, ParNew and ASParNew generation doing scavenge gc uses minor 533 // gc manager (so _fullGC is set to false ) and for other generation kinds 534 // doing mark-sweep-compact uses major gc manager (so _fullGC is set 535 // to true). 536 TraceMemoryManagerStats::TraceMemoryManagerStats(Generation::Name kind, GCCause::Cause cause) { 537 switch (kind) { 538 case Generation::DefNew: 539 #if INCLUDE_ALL_GCS 540 case Generation::ParNew: 541 case Generation::ASParNew: 542 #endif // INCLUDE_ALL_GCS 543 _fullGC=false; 544 break; 545 case Generation::MarkSweepCompact: 546 #if INCLUDE_ALL_GCS 547 case Generation::ConcurrentMarkSweep: 548 case Generation::ASConcurrentMarkSweep: 549 #endif // INCLUDE_ALL_GCS 550 _fullGC=true; 551 break; 552 default: 553 assert(false, "Unrecognized gc generation kind."); 554 } 555 // this has to be called in a stop the world pause and represent 556 // an entire gc pause, start to finish: 557 initialize(_fullGC, cause,true, true, true, true, true, true, true); 558 } 559 TraceMemoryManagerStats::TraceMemoryManagerStats(bool fullGC, 560 GCCause::Cause cause, 561 bool recordGCBeginTime, 562 bool recordPreGCUsage, 563 bool recordPeakUsage, 564 bool recordPostGCUsage, 565 bool recordAccumulatedGCTime, 566 bool recordGCEndTime, 567 bool countCollection) { 568 initialize(fullGC, cause, recordGCBeginTime, recordPreGCUsage, recordPeakUsage, 569 recordPostGCUsage, recordAccumulatedGCTime, recordGCEndTime, 570 countCollection); 571 } 572 573 // for a subclass to create then initialize an instance before invoking 574 // the MemoryService 575 void TraceMemoryManagerStats::initialize(bool fullGC, 576 GCCause::Cause cause, 577 bool recordGCBeginTime, 578 bool recordPreGCUsage, 579 bool recordPeakUsage, 580 bool recordPostGCUsage, 581 bool recordAccumulatedGCTime, 582 bool recordGCEndTime, 583 bool countCollection) { 584 _fullGC = fullGC; 585 _recordGCBeginTime = recordGCBeginTime; 586 _recordPreGCUsage = recordPreGCUsage; 587 _recordPeakUsage = recordPeakUsage; 588 _recordPostGCUsage = recordPostGCUsage; 589 _recordAccumulatedGCTime = recordAccumulatedGCTime; 590 _recordGCEndTime = recordGCEndTime; 591 _countCollection = countCollection; 592 _cause = cause; 593 594 MemoryService::gc_begin(_fullGC, _recordGCBeginTime, _recordAccumulatedGCTime, 595 _recordPreGCUsage, _recordPeakUsage); 596 } 597 598 TraceMemoryManagerStats::~TraceMemoryManagerStats() { 599 MemoryService::gc_end(_fullGC, _recordPostGCUsage, _recordAccumulatedGCTime, 600 _recordGCEndTime, _countCollection, _cause); 601 } 602