author | stefank |
Tue, 12 Apr 2016 07:17:44 +0200 | |
changeset 37462 | 58bb9394a98b |
parent 37149 | f025738bbada |
child 38011 | 74a6871d896b |
permissions | -rw-r--r-- |
1 | 1 |
/* |
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* Copyright (c) 2000, 2016, Oracle and/or its affiliates. All rights reserved. |
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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* |
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*/ |
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||
7397 | 25 |
#include "precompiled.hpp" |
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#include "classfile/symbolTable.hpp" |
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#include "classfile/systemDictionary.hpp" |
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#include "classfile/vmSymbols.hpp" |
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#include "code/codeCache.hpp" |
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#include "code/icBuffer.hpp" |
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#include "gc/shared/collectedHeap.inline.hpp" |
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#include "gc/shared/collectorCounters.hpp" |
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#include "gc/shared/gcId.hpp" |
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#include "gc/shared/gcLocker.inline.hpp" |
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#include "gc/shared/gcTrace.hpp" |
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#include "gc/shared/gcTraceTime.inline.hpp" |
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#include "gc/shared/genCollectedHeap.hpp" |
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#include "gc/shared/genOopClosures.inline.hpp" |
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#include "gc/shared/generationSpec.hpp" |
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#include "gc/shared/space.hpp" |
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#include "gc/shared/strongRootsScope.hpp" |
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#include "gc/shared/vmGCOperations.hpp" |
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#include "gc/shared/workgroup.hpp" |
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7397 | 44 |
#include "memory/filemap.hpp" |
45 |
#include "memory/resourceArea.hpp" |
|
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#include "oops/oop.inline.hpp" |
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#include "runtime/biasedLocking.hpp" |
|
48 |
#include "runtime/fprofiler.hpp" |
|
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#include "runtime/handles.hpp" |
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#include "runtime/handles.inline.hpp" |
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#include "runtime/java.hpp" |
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#include "runtime/vmThread.hpp" |
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#include "services/management.hpp" |
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#include "services/memoryService.hpp" |
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#include "utilities/macros.hpp" |
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#include "utilities/stack.inline.hpp" |
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#include "utilities/vmError.hpp" |
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#if INCLUDE_ALL_GCS |
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#include "gc/cms/concurrentMarkSweepThread.hpp" |
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#include "gc/cms/vmCMSOperations.hpp" |
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#endif // INCLUDE_ALL_GCS |
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NOT_PRODUCT(size_t GenCollectedHeap::_skip_header_HeapWords = 0;) |
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// The set of potentially parallel tasks in root scanning. |
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enum GCH_strong_roots_tasks { |
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GCH_PS_Universe_oops_do, |
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GCH_PS_JNIHandles_oops_do, |
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GCH_PS_ObjectSynchronizer_oops_do, |
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GCH_PS_FlatProfiler_oops_do, |
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GCH_PS_Management_oops_do, |
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GCH_PS_SystemDictionary_oops_do, |
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GCH_PS_ClassLoaderDataGraph_oops_do, |
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GCH_PS_jvmti_oops_do, |
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GCH_PS_CodeCache_oops_do, |
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GCH_PS_younger_gens, |
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// Leave this one last. |
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GCH_PS_NumElements |
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}; |
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||
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GenCollectedHeap::GenCollectedHeap(GenCollectorPolicy *policy) : |
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CollectedHeap(), |
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_rem_set(NULL), |
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_gen_policy(policy), |
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_process_strong_tasks(new SubTasksDone(GCH_PS_NumElements)), |
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_full_collections_completed(0) |
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{ |
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assert(policy != NULL, "Sanity check"); |
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30152 | 89 |
if (UseConcMarkSweepGC) { |
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_workers = new WorkGang("GC Thread", ParallelGCThreads, |
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/* are_GC_task_threads */true, |
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/* are_ConcurrentGC_threads */false); |
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_workers->initialize_workers(); |
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} else { |
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// Serial GC does not use workers. |
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_workers = NULL; |
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} |
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} |
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jint GenCollectedHeap::initialize() { |
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CollectedHeap::pre_initialize(); |
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// While there are no constraints in the GC code that HeapWordSize |
104 |
// be any particular value, there are multiple other areas in the |
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// system which believe this to be true (e.g. oop->object_size in some |
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// cases incorrectly returns the size in wordSize units rather than |
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// HeapWordSize). |
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guarantee(HeapWordSize == wordSize, "HeapWordSize must equal wordSize"); |
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// Allocate space for the heap. |
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char* heap_address; |
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ReservedSpace heap_rs; |
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size_t heap_alignment = collector_policy()->heap_alignment(); |
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heap_address = allocate(heap_alignment, &heap_rs); |
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if (!heap_rs.is_reserved()) { |
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vm_shutdown_during_initialization( |
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"Could not reserve enough space for object heap"); |
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return JNI_ENOMEM; |
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} |
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initialize_reserved_region((HeapWord*)heap_rs.base(), (HeapWord*)(heap_rs.base() + heap_rs.size())); |
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_rem_set = collector_policy()->create_rem_set(reserved_region()); |
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set_barrier_set(rem_set()->bs()); |
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ReservedSpace young_rs = heap_rs.first_part(gen_policy()->young_gen_spec()->max_size(), false, false); |
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_young_gen = gen_policy()->young_gen_spec()->init(young_rs, rem_set()); |
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heap_rs = heap_rs.last_part(gen_policy()->young_gen_spec()->max_size()); |
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ReservedSpace old_rs = heap_rs.first_part(gen_policy()->old_gen_spec()->max_size(), false, false); |
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_old_gen = gen_policy()->old_gen_spec()->init(old_rs, rem_set()); |
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clear_incremental_collection_failed(); |
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#if INCLUDE_ALL_GCS |
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// If we are running CMS, create the collector responsible |
140 |
// for collecting the CMS generations. |
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141 |
if (collector_policy()->is_concurrent_mark_sweep_policy()) { |
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bool success = create_cms_collector(); |
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if (!success) return JNI_ENOMEM; |
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} |
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#endif // INCLUDE_ALL_GCS |
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return JNI_OK; |
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} |
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150 |
char* GenCollectedHeap::allocate(size_t alignment, |
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ReservedSpace* heap_rs){ |
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// Now figure out the total size. |
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const size_t pageSize = UseLargePages ? os::large_page_size() : os::vm_page_size(); |
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assert(alignment % pageSize == 0, "Must be"); |
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GenerationSpec* young_spec = gen_policy()->young_gen_spec(); |
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GenerationSpec* old_spec = gen_policy()->old_gen_spec(); |
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159 |
// Check for overflow. |
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160 |
size_t total_reserved = young_spec->max_size() + old_spec->max_size(); |
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161 |
if (total_reserved < young_spec->max_size()) { |
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vm_exit_during_initialization("The size of the object heap + VM data exceeds " |
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"the maximum representable size"); |
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} |
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assert(total_reserved % alignment == 0, |
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"Gen size; total_reserved=" SIZE_FORMAT ", alignment=" |
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SIZE_FORMAT, total_reserved, alignment); |
1 | 168 |
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*heap_rs = Universe::reserve_heap(total_reserved, alignment); |
37462 | 170 |
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171 |
os::trace_page_sizes("Heap", |
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172 |
collector_policy()->min_heap_byte_size(), |
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173 |
total_reserved, |
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alignment, |
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heap_rs->base(), |
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heap_rs->size()); |
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||
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return heap_rs->base(); |
1 | 179 |
} |
180 |
||
181 |
void GenCollectedHeap::post_initialize() { |
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30152 | 182 |
CollectedHeap::post_initialize(); |
183 |
ref_processing_init(); |
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assert((_young_gen->kind() == Generation::DefNew) || |
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(_young_gen->kind() == Generation::ParNew), |
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"Wrong youngest generation type"); |
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DefNewGeneration* def_new_gen = (DefNewGeneration*)_young_gen; |
1 | 188 |
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assert(_old_gen->kind() == Generation::ConcurrentMarkSweep || |
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_old_gen->kind() == Generation::MarkSweepCompact, |
1 | 191 |
"Wrong generation kind"); |
192 |
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_gen_policy->initialize_size_policy(def_new_gen->eden()->capacity(), |
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_old_gen->capacity(), |
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def_new_gen->from()->capacity()); |
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196 |
_gen_policy->initialize_gc_policy_counters(); |
1 | 197 |
} |
198 |
||
199 |
void GenCollectedHeap::ref_processing_init() { |
|
29200 | 200 |
_young_gen->ref_processor_init(); |
201 |
_old_gen->ref_processor_init(); |
|
1 | 202 |
} |
203 |
||
204 |
size_t GenCollectedHeap::capacity() const { |
|
29200 | 205 |
return _young_gen->capacity() + _old_gen->capacity(); |
1 | 206 |
} |
207 |
||
208 |
size_t GenCollectedHeap::used() const { |
|
29200 | 209 |
return _young_gen->used() + _old_gen->used(); |
1 | 210 |
} |
211 |
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void GenCollectedHeap::save_used_regions() { |
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213 |
_old_gen->save_used_region(); |
29200 | 214 |
_young_gen->save_used_region(); |
1 | 215 |
} |
216 |
||
217 |
size_t GenCollectedHeap::max_capacity() const { |
|
29200 | 218 |
return _young_gen->max_capacity() + _old_gen->max_capacity(); |
1 | 219 |
} |
220 |
||
221 |
// Update the _full_collections_completed counter |
|
222 |
// at the end of a stop-world full GC. |
|
223 |
unsigned int GenCollectedHeap::update_full_collections_completed() { |
|
224 |
MonitorLockerEx ml(FullGCCount_lock, Mutex::_no_safepoint_check_flag); |
|
225 |
assert(_full_collections_completed <= _total_full_collections, |
|
226 |
"Can't complete more collections than were started"); |
|
227 |
_full_collections_completed = _total_full_collections; |
|
228 |
ml.notify_all(); |
|
229 |
return _full_collections_completed; |
|
230 |
} |
|
231 |
||
232 |
// Update the _full_collections_completed counter, as appropriate, |
|
233 |
// at the end of a concurrent GC cycle. Note the conditional update |
|
234 |
// below to allow this method to be called by a concurrent collector |
|
235 |
// without synchronizing in any manner with the VM thread (which |
|
236 |
// may already have initiated a STW full collection "concurrently"). |
|
237 |
unsigned int GenCollectedHeap::update_full_collections_completed(unsigned int count) { |
|
238 |
MonitorLockerEx ml(FullGCCount_lock, Mutex::_no_safepoint_check_flag); |
|
239 |
assert((_full_collections_completed <= _total_full_collections) && |
|
240 |
(count <= _total_full_collections), |
|
241 |
"Can't complete more collections than were started"); |
|
242 |
if (count > _full_collections_completed) { |
|
243 |
_full_collections_completed = count; |
|
244 |
ml.notify_all(); |
|
245 |
} |
|
246 |
return _full_collections_completed; |
|
247 |
} |
|
248 |
||
249 |
||
250 |
#ifndef PRODUCT |
|
251 |
// Override of memory state checking method in CollectedHeap: |
|
252 |
// Some collectors (CMS for example) can't have badHeapWordVal written |
|
253 |
// in the first two words of an object. (For instance , in the case of |
|
254 |
// CMS these words hold state used to synchronize between certain |
|
255 |
// (concurrent) GC steps and direct allocating mutators.) |
|
256 |
// The skip_header_HeapWords() method below, allows us to skip |
|
257 |
// over the requisite number of HeapWord's. Note that (for |
|
258 |
// generational collectors) this means that those many words are |
|
259 |
// skipped in each object, irrespective of the generation in which |
|
260 |
// that object lives. The resultant loss of precision seems to be |
|
261 |
// harmless and the pain of avoiding that imprecision appears somewhat |
|
262 |
// higher than we are prepared to pay for such rudimentary debugging |
|
263 |
// support. |
|
264 |
void GenCollectedHeap::check_for_non_bad_heap_word_value(HeapWord* addr, |
|
265 |
size_t size) { |
|
266 |
if (CheckMemoryInitialization && ZapUnusedHeapArea) { |
|
267 |
// We are asked to check a size in HeapWords, |
|
268 |
// but the memory is mangled in juint words. |
|
269 |
juint* start = (juint*) (addr + skip_header_HeapWords()); |
|
270 |
juint* end = (juint*) (addr + size); |
|
271 |
for (juint* slot = start; slot < end; slot += 1) { |
|
272 |
assert(*slot == badHeapWordVal, |
|
273 |
"Found non badHeapWordValue in pre-allocation check"); |
|
274 |
} |
|
275 |
} |
|
276 |
} |
|
277 |
#endif |
|
278 |
||
279 |
HeapWord* GenCollectedHeap::attempt_allocation(size_t size, |
|
280 |
bool is_tlab, |
|
281 |
bool first_only) { |
|
29200 | 282 |
HeapWord* res = NULL; |
283 |
||
284 |
if (_young_gen->should_allocate(size, is_tlab)) { |
|
285 |
res = _young_gen->allocate(size, is_tlab); |
|
286 |
if (res != NULL || first_only) { |
|
287 |
return res; |
|
1 | 288 |
} |
289 |
} |
|
29200 | 290 |
|
291 |
if (_old_gen->should_allocate(size, is_tlab)) { |
|
292 |
res = _old_gen->allocate(size, is_tlab); |
|
293 |
} |
|
294 |
||
295 |
return res; |
|
1 | 296 |
} |
297 |
||
298 |
HeapWord* GenCollectedHeap::mem_allocate(size_t size, |
|
299 |
bool* gc_overhead_limit_was_exceeded) { |
|
35927
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|
300 |
return gen_policy()->mem_allocate_work(size, |
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|
301 |
false /* is_tlab */, |
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changeset
|
302 |
gc_overhead_limit_was_exceeded); |
1 | 303 |
} |
304 |
||
305 |
bool GenCollectedHeap::must_clear_all_soft_refs() { |
|
37149
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8152113: Remove _last_ditch_collection GC-cause and avoid expanding heap on Metaspace OOM
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|
306 |
return _gc_cause == GCCause::_metadata_GC_clear_soft_refs || |
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|
307 |
_gc_cause == GCCause::_wb_full_gc; |
1 | 308 |
} |
309 |
||
310 |
bool GenCollectedHeap::should_do_concurrent_full_gc(GCCause::Cause cause) { |
|
31032
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|
311 |
if (!UseConcMarkSweepGC) { |
8e72621ca186
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|
312 |
return false; |
8e72621ca186
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changeset
|
313 |
} |
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changeset
|
314 |
|
8e72621ca186
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changeset
|
315 |
switch (cause) { |
8e72621ca186
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changeset
|
316 |
case GCCause::_gc_locker: return GCLockerInvokesConcurrent; |
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|
317 |
case GCCause::_java_lang_system_gc: |
8e72621ca186
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changeset
|
318 |
case GCCause::_dcmd_gc_run: return ExplicitGCInvokesConcurrent; |
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|
319 |
default: return false; |
8e72621ca186
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changeset
|
320 |
} |
1 | 321 |
} |
322 |
||
29200 | 323 |
void GenCollectedHeap::collect_generation(Generation* gen, bool full, size_t size, |
324 |
bool is_tlab, bool run_verification, bool clear_soft_refs, |
|
325 |
bool restore_marks_for_biased_locking) { |
|
35061 | 326 |
FormatBuffer<> title("Collect gen: %s", gen->short_name()); |
37146 | 327 |
GCTraceTime(Trace, gc, phases) t1(title); |
29200 | 328 |
TraceCollectorStats tcs(gen->counters()); |
329 |
TraceMemoryManagerStats tmms(gen->kind(),gc_cause()); |
|
330 |
||
331 |
gen->stat_record()->invocations++; |
|
332 |
gen->stat_record()->accumulated_time.start(); |
|
333 |
||
334 |
// Must be done anew before each collection because |
|
335 |
// a previous collection will do mangling and will |
|
336 |
// change top of some spaces. |
|
337 |
record_gen_tops_before_GC(); |
|
338 |
||
35061 | 339 |
log_trace(gc)("%s invoke=%d size=" SIZE_FORMAT, heap()->is_young_gen(gen) ? "Young" : "Old", gen->stat_record()->invocations, size * HeapWordSize); |
29200 | 340 |
|
341 |
if (run_verification && VerifyBeforeGC) { |
|
342 |
HandleMark hm; // Discard invalid handles created during verification |
|
35061 | 343 |
Universe::verify("Before GC"); |
29200 | 344 |
} |
345 |
COMPILER2_PRESENT(DerivedPointerTable::clear()); |
|
346 |
||
347 |
if (restore_marks_for_biased_locking) { |
|
348 |
// We perform this mark word preservation work lazily |
|
349 |
// because it's only at this point that we know whether we |
|
350 |
// absolutely have to do it; we want to avoid doing it for |
|
351 |
// scavenge-only collections where it's unnecessary |
|
352 |
BiasedLocking::preserve_marks(); |
|
353 |
} |
|
354 |
||
355 |
// Do collection work |
|
356 |
{ |
|
357 |
// Note on ref discovery: For what appear to be historical reasons, |
|
358 |
// GCH enables and disabled (by enqueing) refs discovery. |
|
359 |
// In the future this should be moved into the generation's |
|
360 |
// collect method so that ref discovery and enqueueing concerns |
|
361 |
// are local to a generation. The collect method could return |
|
362 |
// an appropriate indication in the case that notification on |
|
363 |
// the ref lock was needed. This will make the treatment of |
|
364 |
// weak refs more uniform (and indeed remove such concerns |
|
365 |
// from GCH). XXX |
|
366 |
||
367 |
HandleMark hm; // Discard invalid handles created during gc |
|
368 |
save_marks(); // save marks for all gens |
|
369 |
// We want to discover references, but not process them yet. |
|
370 |
// This mode is disabled in process_discovered_references if the |
|
371 |
// generation does some collection work, or in |
|
372 |
// enqueue_discovered_references if the generation returns |
|
373 |
// without doing any work. |
|
374 |
ReferenceProcessor* rp = gen->ref_processor(); |
|
375 |
// If the discovery of ("weak") refs in this generation is |
|
376 |
// atomic wrt other collectors in this configuration, we |
|
377 |
// are guaranteed to have empty discovered ref lists. |
|
378 |
if (rp->discovery_is_atomic()) { |
|
379 |
rp->enable_discovery(); |
|
380 |
rp->setup_policy(clear_soft_refs); |
|
381 |
} else { |
|
382 |
// collect() below will enable discovery as appropriate |
|
383 |
} |
|
384 |
gen->collect(full, clear_soft_refs, size, is_tlab); |
|
385 |
if (!rp->enqueuing_is_done()) { |
|
386 |
rp->enqueue_discovered_references(); |
|
387 |
} else { |
|
388 |
rp->set_enqueuing_is_done(false); |
|
389 |
} |
|
390 |
rp->verify_no_references_recorded(); |
|
391 |
} |
|
392 |
||
393 |
COMPILER2_PRESENT(DerivedPointerTable::update_pointers()); |
|
394 |
||
395 |
gen->stat_record()->accumulated_time.stop(); |
|
396 |
||
31358
693058672cc6
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jwilhelm
parents:
31032
diff
changeset
|
397 |
update_gc_stats(gen, full); |
29200 | 398 |
|
399 |
if (run_verification && VerifyAfterGC) { |
|
400 |
HandleMark hm; // Discard invalid handles created during verification |
|
35061 | 401 |
Universe::verify("After GC"); |
29200 | 402 |
} |
403 |
} |
|
404 |
||
31358
693058672cc6
8077842: Remove the level parameter passed around in GenCollectedHeap
jwilhelm
parents:
31032
diff
changeset
|
405 |
void GenCollectedHeap::do_collection(bool full, |
693058672cc6
8077842: Remove the level parameter passed around in GenCollectedHeap
jwilhelm
parents:
31032
diff
changeset
|
406 |
bool clear_all_soft_refs, |
693058672cc6
8077842: Remove the level parameter passed around in GenCollectedHeap
jwilhelm
parents:
31032
diff
changeset
|
407 |
size_t size, |
693058672cc6
8077842: Remove the level parameter passed around in GenCollectedHeap
jwilhelm
parents:
31032
diff
changeset
|
408 |
bool is_tlab, |
693058672cc6
8077842: Remove the level parameter passed around in GenCollectedHeap
jwilhelm
parents:
31032
diff
changeset
|
409 |
GenerationType max_generation) { |
1 | 410 |
ResourceMark rm; |
411 |
DEBUG_ONLY(Thread* my_thread = Thread::current();) |
|
412 |
||
413 |
assert(SafepointSynchronize::is_at_safepoint(), "should be at safepoint"); |
|
414 |
assert(my_thread->is_VM_thread() || |
|
415 |
my_thread->is_ConcurrentGC_thread(), |
|
416 |
"incorrect thread type capability"); |
|
5343
95a5c4b89273
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
jmasa
parents:
4641
diff
changeset
|
417 |
assert(Heap_lock->is_locked(), |
95a5c4b89273
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
jmasa
parents:
4641
diff
changeset
|
418 |
"the requesting thread should have the Heap_lock"); |
1 | 419 |
guarantee(!is_gc_active(), "collection is not reentrant"); |
420 |
||
35492
c8c0273e6b91
8146690: Make all classes in GC follow the naming convention.
david
parents:
35061
diff
changeset
|
421 |
if (GCLocker::check_active_before_gc()) { |
1 | 422 |
return; // GC is disabled (e.g. JNI GetXXXCritical operation) |
423 |
} |
|
424 |
||
33229
51173444fdd5
8139868: CMSScavengeBeforeRemark broken after JDK-8134953
brutisso
parents:
33212
diff
changeset
|
425 |
GCIdMarkAndRestore gc_id_mark; |
33107
77bf0d2069a3
8134953: Make the GC ID available in a central place
brutisso
parents:
33105
diff
changeset
|
426 |
|
5343
95a5c4b89273
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
jmasa
parents:
4641
diff
changeset
|
427 |
const bool do_clear_all_soft_refs = clear_all_soft_refs || |
95a5c4b89273
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
jmasa
parents:
4641
diff
changeset
|
428 |
collector_policy()->should_clear_all_soft_refs(); |
95a5c4b89273
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
jmasa
parents:
4641
diff
changeset
|
429 |
|
95a5c4b89273
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
jmasa
parents:
4641
diff
changeset
|
430 |
ClearedAllSoftRefs casr(do_clear_all_soft_refs, collector_policy()); |
95a5c4b89273
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
jmasa
parents:
4641
diff
changeset
|
431 |
|
23854
50f7f89b34e0
8038934: Remove prefix allocated_ from methods and variables in Metaspace
ehelin
parents:
23508
diff
changeset
|
432 |
const size_t metadata_prev_used = MetaspaceAux::used_bytes(); |
1 | 433 |
|
11636
3c07b54482a5
7141200: log some interesting information in ring buffers for crashes
never
parents:
11396
diff
changeset
|
434 |
print_heap_before_gc(); |
1 | 435 |
|
436 |
{ |
|
437 |
FlagSetting fl(_is_gc_active, true); |
|
438 |
||
31358
693058672cc6
8077842: Remove the level parameter passed around in GenCollectedHeap
jwilhelm
parents:
31032
diff
changeset
|
439 |
bool complete = full && (max_generation == OldGen); |
35061 | 440 |
bool old_collects_young = complete && !ScavengeBeforeFullGC; |
441 |
bool do_young_collection = !old_collects_young && _young_gen->should_collect(full, size, is_tlab); |
|
442 |
||
443 |
FormatBuffer<> gc_string("%s", "Pause "); |
|
444 |
if (do_young_collection) { |
|
445 |
gc_string.append("Young"); |
|
446 |
} else { |
|
447 |
gc_string.append("Full"); |
|
448 |
} |
|
449 |
||
450 |
GCTraceCPUTime tcpu; |
|
451 |
GCTraceTime(Info, gc) t(gc_string, NULL, gc_cause(), true); |
|
1 | 452 |
|
453 |
gc_prologue(complete); |
|
454 |
increment_total_collections(complete); |
|
455 |
||
35061 | 456 |
size_t young_prev_used = _young_gen->used(); |
457 |
size_t old_prev_used = _old_gen->used(); |
|
458 |
||
29200 | 459 |
bool run_verification = total_collections() >= VerifyGCStartAt; |
1 | 460 |
|
29200 | 461 |
bool prepared_for_verification = false; |
31358
693058672cc6
8077842: Remove the level parameter passed around in GenCollectedHeap
jwilhelm
parents:
31032
diff
changeset
|
462 |
bool collected_old = false; |
33580 | 463 |
|
35061 | 464 |
if (do_young_collection) { |
29200 | 465 |
if (run_verification && VerifyGCLevel <= 0 && VerifyBeforeGC) { |
466 |
prepare_for_verify(); |
|
467 |
prepared_for_verification = true; |
|
468 |
} |
|
469 |
||
470 |
collect_generation(_young_gen, |
|
471 |
full, |
|
472 |
size, |
|
473 |
is_tlab, |
|
474 |
run_verification && VerifyGCLevel <= 0, |
|
475 |
do_clear_all_soft_refs, |
|
476 |
false); |
|
477 |
||
478 |
if (size > 0 && (!is_tlab || _young_gen->supports_tlab_allocation()) && |
|
479 |
size * HeapWordSize <= _young_gen->unsafe_max_alloc_nogc()) { |
|
480 |
// Allocation request was met by young GC. |
|
481 |
size = 0; |
|
27252 | 482 |
} |
1 | 483 |
} |
484 |
||
27252 | 485 |
bool must_restore_marks_for_biased_locking = false; |
486 |
||
31358
693058672cc6
8077842: Remove the level parameter passed around in GenCollectedHeap
jwilhelm
parents:
31032
diff
changeset
|
487 |
if (max_generation == OldGen && _old_gen->should_collect(full, size, is_tlab)) { |
29200 | 488 |
if (!complete) { |
489 |
// The full_collections increment was missed above. |
|
490 |
increment_total_full_collections(); |
|
491 |
} |
|
27252 | 492 |
|
29200 | 493 |
if (!prepared_for_verification && run_verification && |
494 |
VerifyGCLevel <= 1 && VerifyBeforeGC) { |
|
495 |
prepare_for_verify(); |
|
496 |
} |
|
27252 | 497 |
|
35061 | 498 |
if (do_young_collection) { |
499 |
// We did a young GC. Need a new GC id for the old GC. |
|
500 |
GCIdMarkAndRestore gc_id_mark; |
|
501 |
GCTraceTime(Info, gc) t("Pause Full", NULL, gc_cause(), true); |
|
502 |
collect_generation(_old_gen, full, size, is_tlab, run_verification && VerifyGCLevel <= 1, do_clear_all_soft_refs, true); |
|
503 |
} else { |
|
504 |
// No young GC done. Use the same GC id as was set up earlier in this method. |
|
505 |
collect_generation(_old_gen, full, size, is_tlab, run_verification && VerifyGCLevel <= 1, do_clear_all_soft_refs, true); |
|
506 |
} |
|
27252 | 507 |
|
29200 | 508 |
must_restore_marks_for_biased_locking = true; |
31358
693058672cc6
8077842: Remove the level parameter passed around in GenCollectedHeap
jwilhelm
parents:
31032
diff
changeset
|
509 |
collected_old = true; |
1 | 510 |
} |
511 |
||
512 |
// Update "complete" boolean wrt what actually transpired -- |
|
513 |
// for instance, a promotion failure could have led to |
|
514 |
// a whole heap collection. |
|
31358
693058672cc6
8077842: Remove the level parameter passed around in GenCollectedHeap
jwilhelm
parents:
31032
diff
changeset
|
515 |
complete = complete || collected_old; |
1 | 516 |
|
35061 | 517 |
print_heap_change(young_prev_used, old_prev_used); |
518 |
MetaspaceAux::print_metaspace_change(metadata_prev_used); |
|
1 | 519 |
|
29200 | 520 |
// Adjust generation sizes. |
31358
693058672cc6
8077842: Remove the level parameter passed around in GenCollectedHeap
jwilhelm
parents:
31032
diff
changeset
|
521 |
if (collected_old) { |
29200 | 522 |
_old_gen->compute_new_size(); |
1 | 523 |
} |
29200 | 524 |
_young_gen->compute_new_size(); |
1 | 525 |
|
526 |
if (complete) { |
|
16385
4a05c6d94b04
8005602: NPG: classunloading does not happen while CMS GC with -XX:+CMSClassUnloadingEnabled is used
mgerdin
parents:
15482
diff
changeset
|
527 |
// Delete metaspaces for unloaded class loaders and clean up loader_data graph |
4a05c6d94b04
8005602: NPG: classunloading does not happen while CMS GC with -XX:+CMSClassUnloadingEnabled is used
mgerdin
parents:
15482
diff
changeset
|
528 |
ClassLoaderDataGraph::purge(); |
17109
90e6c31bbbe4
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
17105
diff
changeset
|
529 |
MetaspaceAux::verify_metrics(); |
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
12781
diff
changeset
|
530 |
// Resize the metaspace capacity after full collections |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
12781
diff
changeset
|
531 |
MetaspaceGC::compute_new_size(); |
1 | 532 |
update_full_collections_completed(); |
533 |
} |
|
534 |
||
535 |
// Track memory usage and detect low memory after GC finishes |
|
536 |
MemoryService::track_memory_usage(); |
|
537 |
||
538 |
gc_epilogue(complete); |
|
539 |
||
540 |
if (must_restore_marks_for_biased_locking) { |
|
541 |
BiasedLocking::restore_marks(); |
|
542 |
} |
|
543 |
} |
|
544 |
||
11636
3c07b54482a5
7141200: log some interesting information in ring buffers for crashes
never
parents:
11396
diff
changeset
|
545 |
print_heap_after_gc(); |
1 | 546 |
|
2010
c13462bbad17
6690928: Use spinning in combination with yields for workstealing termination.
jmasa
parents:
1893
diff
changeset
|
547 |
#ifdef TRACESPINNING |
c13462bbad17
6690928: Use spinning in combination with yields for workstealing termination.
jmasa
parents:
1893
diff
changeset
|
548 |
ParallelTaskTerminator::print_termination_counts(); |
c13462bbad17
6690928: Use spinning in combination with yields for workstealing termination.
jmasa
parents:
1893
diff
changeset
|
549 |
#endif |
1 | 550 |
} |
551 |
||
552 |
HeapWord* GenCollectedHeap::satisfy_failed_allocation(size_t size, bool is_tlab) { |
|
35927
58bbbbb4a8c7
8148944: CollectorPolicy methods for memory allocations are specific to GenCollectorPolicy
mgerdin
parents:
35492
diff
changeset
|
553 |
return gen_policy()->satisfy_failed_allocation(size, is_tlab); |
1 | 554 |
} |
555 |
||
29693
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
29684
diff
changeset
|
556 |
#ifdef ASSERT |
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
29684
diff
changeset
|
557 |
class AssertNonScavengableClosure: public OopClosure { |
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
29684
diff
changeset
|
558 |
public: |
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
29684
diff
changeset
|
559 |
virtual void do_oop(oop* p) { |
29803 | 560 |
assert(!GenCollectedHeap::heap()->is_in_partial_collection(*p), |
29693
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
29684
diff
changeset
|
561 |
"Referent should not be scavengable."); } |
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
29684
diff
changeset
|
562 |
virtual void do_oop(narrowOop* p) { ShouldNotReachHere(); } |
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
29684
diff
changeset
|
563 |
}; |
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8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
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changeset
|
564 |
static AssertNonScavengableClosure assert_is_non_scavengable_closure; |
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
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changeset
|
565 |
#endif |
fac175f7a466
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changeset
|
566 |
|
30868
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8080110: Remove usage of CollectedHeap::n_par_threads() from root processing
stefank
parents:
30867
diff
changeset
|
567 |
void GenCollectedHeap::process_roots(StrongRootsScope* scope, |
29693
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8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
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changeset
|
568 |
ScanningOption so, |
fac175f7a466
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changeset
|
569 |
OopClosure* strong_roots, |
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changeset
|
570 |
OopClosure* weak_roots, |
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changeset
|
571 |
CLDClosure* strong_cld_closure, |
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changeset
|
572 |
CLDClosure* weak_cld_closure, |
36591
d0622cab5983
8150013: ParNew: Prune nmethods scavengable list.
cvarming
parents:
35939
diff
changeset
|
573 |
CodeBlobToOopClosure* code_roots) { |
25492
d27050bdfb04
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
25491
diff
changeset
|
574 |
// General roots. |
29802
d485440c958a
8076225: Move the thread claim parity from SharedHeap to Thread
mgerdin
parents:
29800
diff
changeset
|
575 |
assert(Threads::thread_claim_parity() != 0, "must have called prologue code"); |
29693
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8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
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changeset
|
576 |
assert(code_roots != NULL, "code root closure should always be set"); |
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
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changeset
|
577 |
// _n_termination for _process_strong_tasks should be set up stream |
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
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changeset
|
578 |
// in a method not running in a GC worker. Otherwise the GC worker |
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
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changeset
|
579 |
// could be trying to change the termination condition while the task |
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
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changeset
|
580 |
// is executing in another GC worker. |
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
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diff
changeset
|
581 |
|
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
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changeset
|
582 |
if (!_process_strong_tasks->is_task_claimed(GCH_PS_ClassLoaderDataGraph_oops_do)) { |
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
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changeset
|
583 |
ClassLoaderDataGraph::roots_cld_do(strong_cld_closure, weak_cld_closure); |
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
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changeset
|
584 |
} |
fac175f7a466
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parents:
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diff
changeset
|
585 |
|
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
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diff
changeset
|
586 |
// Some CLDs contained in the thread frames should be considered strong. |
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
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diff
changeset
|
587 |
// Don't process them if they will be processed during the ClassLoaderDataGraph phase. |
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
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changeset
|
588 |
CLDClosure* roots_from_clds_p = (strong_cld_closure != weak_cld_closure) ? strong_cld_closure : NULL; |
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
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changeset
|
589 |
// Only process code roots from thread stacks if we aren't visiting the entire CodeCache anyway |
36591
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8150013: ParNew: Prune nmethods scavengable list.
cvarming
parents:
35939
diff
changeset
|
590 |
CodeBlobToOopClosure* roots_from_code_p = (so & SO_AllCodeCache) ? NULL : code_roots; |
29693
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8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
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diff
changeset
|
591 |
|
30868
c1b24f26deed
8080110: Remove usage of CollectedHeap::n_par_threads() from root processing
stefank
parents:
30867
diff
changeset
|
592 |
bool is_par = scope->n_threads() > 1; |
30147
af9a41999c6e
8076314: Remove the static instance variable SharedHeap:: _sh
brutisso
parents:
29804
diff
changeset
|
593 |
Threads::possibly_parallel_oops_do(is_par, strong_roots, roots_from_clds_p, roots_from_code_p); |
29693
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changeset
|
594 |
|
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
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diff
changeset
|
595 |
if (!_process_strong_tasks->is_task_claimed(GCH_PS_Universe_oops_do)) { |
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
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diff
changeset
|
596 |
Universe::oops_do(strong_roots); |
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
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changeset
|
597 |
} |
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
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parents:
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changeset
|
598 |
// Global (strong) JNI handles |
fac175f7a466
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mgerdin
parents:
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diff
changeset
|
599 |
if (!_process_strong_tasks->is_task_claimed(GCH_PS_JNIHandles_oops_do)) { |
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
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parents:
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diff
changeset
|
600 |
JNIHandles::oops_do(strong_roots); |
fac175f7a466
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parents:
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diff
changeset
|
601 |
} |
fac175f7a466
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mgerdin
parents:
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diff
changeset
|
602 |
|
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
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diff
changeset
|
603 |
if (!_process_strong_tasks->is_task_claimed(GCH_PS_ObjectSynchronizer_oops_do)) { |
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
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diff
changeset
|
604 |
ObjectSynchronizer::oops_do(strong_roots); |
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
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diff
changeset
|
605 |
} |
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
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diff
changeset
|
606 |
if (!_process_strong_tasks->is_task_claimed(GCH_PS_FlatProfiler_oops_do)) { |
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
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diff
changeset
|
607 |
FlatProfiler::oops_do(strong_roots); |
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
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diff
changeset
|
608 |
} |
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
29684
diff
changeset
|
609 |
if (!_process_strong_tasks->is_task_claimed(GCH_PS_Management_oops_do)) { |
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
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diff
changeset
|
610 |
Management::oops_do(strong_roots); |
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
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diff
changeset
|
611 |
} |
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
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diff
changeset
|
612 |
if (!_process_strong_tasks->is_task_claimed(GCH_PS_jvmti_oops_do)) { |
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
29684
diff
changeset
|
613 |
JvmtiExport::oops_do(strong_roots); |
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
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diff
changeset
|
614 |
} |
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
29684
diff
changeset
|
615 |
|
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
29684
diff
changeset
|
616 |
if (!_process_strong_tasks->is_task_claimed(GCH_PS_SystemDictionary_oops_do)) { |
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
29684
diff
changeset
|
617 |
SystemDictionary::roots_oops_do(strong_roots, weak_roots); |
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
29684
diff
changeset
|
618 |
} |
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
29684
diff
changeset
|
619 |
|
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
29684
diff
changeset
|
620 |
// All threads execute the following. A specific chunk of buckets |
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
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diff
changeset
|
621 |
// from the StringTable are the individual tasks. |
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
29684
diff
changeset
|
622 |
if (weak_roots != NULL) { |
30581
a91d6c47f076
8079275: Remove CollectedHeap::use_parallel_gc_threads
stefank
parents:
30258
diff
changeset
|
623 |
if (is_par) { |
29693
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
29684
diff
changeset
|
624 |
StringTable::possibly_parallel_oops_do(weak_roots); |
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
29684
diff
changeset
|
625 |
} else { |
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
29684
diff
changeset
|
626 |
StringTable::oops_do(weak_roots); |
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
29684
diff
changeset
|
627 |
} |
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
29684
diff
changeset
|
628 |
} |
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
29684
diff
changeset
|
629 |
|
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
29684
diff
changeset
|
630 |
if (!_process_strong_tasks->is_task_claimed(GCH_PS_CodeCache_oops_do)) { |
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
29684
diff
changeset
|
631 |
if (so & SO_ScavengeCodeCache) { |
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
29684
diff
changeset
|
632 |
assert(code_roots != NULL, "must supply closure for code cache"); |
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
29684
diff
changeset
|
633 |
|
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
29684
diff
changeset
|
634 |
// We only visit parts of the CodeCache when scavenging. |
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
29684
diff
changeset
|
635 |
CodeCache::scavenge_root_nmethods_do(code_roots); |
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
29684
diff
changeset
|
636 |
} |
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
29684
diff
changeset
|
637 |
if (so & SO_AllCodeCache) { |
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
29684
diff
changeset
|
638 |
assert(code_roots != NULL, "must supply closure for code cache"); |
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
29684
diff
changeset
|
639 |
|
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
29684
diff
changeset
|
640 |
// CMSCollector uses this to do intermediate-strength collections. |
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
29684
diff
changeset
|
641 |
// We scan the entire code cache, since CodeCache::do_unloading is not called. |
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
29684
diff
changeset
|
642 |
CodeCache::blobs_do(code_roots); |
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
29684
diff
changeset
|
643 |
} |
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
29684
diff
changeset
|
644 |
// Verify that the code cache contents are not subject to |
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
29684
diff
changeset
|
645 |
// movement by a scavenging collection. |
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
29684
diff
changeset
|
646 |
DEBUG_ONLY(CodeBlobToOopClosure assert_code_is_non_scavengable(&assert_is_non_scavengable_closure, !CodeBlobToOopClosure::FixRelocations)); |
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
29684
diff
changeset
|
647 |
DEBUG_ONLY(CodeCache::asserted_non_scavengable_nmethods_do(&assert_code_is_non_scavengable)); |
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
29684
diff
changeset
|
648 |
} |
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
29684
diff
changeset
|
649 |
} |
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
29684
diff
changeset
|
650 |
|
30868
c1b24f26deed
8080110: Remove usage of CollectedHeap::n_par_threads() from root processing
stefank
parents:
30867
diff
changeset
|
651 |
void GenCollectedHeap::gen_process_roots(StrongRootsScope* scope, |
31358
693058672cc6
8077842: Remove the level parameter passed around in GenCollectedHeap
jwilhelm
parents:
31032
diff
changeset
|
652 |
GenerationType type, |
32623
390a27af5657
8134626: Misc cleanups after generation array removal
jwilhelm
parents:
32360
diff
changeset
|
653 |
bool young_gen_as_roots, |
29693
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
29684
diff
changeset
|
654 |
ScanningOption so, |
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
29684
diff
changeset
|
655 |
bool only_strong_roots, |
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
29684
diff
changeset
|
656 |
OopsInGenClosure* not_older_gens, |
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
29684
diff
changeset
|
657 |
OopsInGenClosure* older_gens, |
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
29684
diff
changeset
|
658 |
CLDClosure* cld_closure) { |
32623
390a27af5657
8134626: Misc cleanups after generation array removal
jwilhelm
parents:
32360
diff
changeset
|
659 |
const bool is_adjust_phase = !only_strong_roots && !young_gen_as_roots; |
29693
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
29684
diff
changeset
|
660 |
|
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
29684
diff
changeset
|
661 |
bool is_moving_collection = false; |
31358
693058672cc6
8077842: Remove the level parameter passed around in GenCollectedHeap
jwilhelm
parents:
31032
diff
changeset
|
662 |
if (type == YoungGen || is_adjust_phase) { |
29693
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
29684
diff
changeset
|
663 |
// young collections are always moving |
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
29684
diff
changeset
|
664 |
is_moving_collection = true; |
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
29684
diff
changeset
|
665 |
} |
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
29684
diff
changeset
|
666 |
|
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
29684
diff
changeset
|
667 |
MarkingCodeBlobClosure mark_code_closure(not_older_gens, is_moving_collection); |
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
29684
diff
changeset
|
668 |
OopsInGenClosure* weak_roots = only_strong_roots ? NULL : not_older_gens; |
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
29684
diff
changeset
|
669 |
CLDClosure* weak_cld_closure = only_strong_roots ? NULL : cld_closure; |
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
29684
diff
changeset
|
670 |
|
30868
c1b24f26deed
8080110: Remove usage of CollectedHeap::n_par_threads() from root processing
stefank
parents:
30867
diff
changeset
|
671 |
process_roots(scope, so, |
29693
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
29684
diff
changeset
|
672 |
not_older_gens, weak_roots, |
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
29684
diff
changeset
|
673 |
cld_closure, weak_cld_closure, |
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
29684
diff
changeset
|
674 |
&mark_code_closure); |
1 | 675 |
|
32623
390a27af5657
8134626: Misc cleanups after generation array removal
jwilhelm
parents:
32360
diff
changeset
|
676 |
if (young_gen_as_roots) { |
29693
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
29684
diff
changeset
|
677 |
if (!_process_strong_tasks->is_task_claimed(GCH_PS_younger_gens)) { |
31358
693058672cc6
8077842: Remove the level parameter passed around in GenCollectedHeap
jwilhelm
parents:
31032
diff
changeset
|
678 |
if (type == OldGen) { |
29200 | 679 |
not_older_gens->set_generation(_young_gen); |
680 |
_young_gen->oop_iterate(not_older_gens); |
|
1 | 681 |
} |
682 |
not_older_gens->reset_generation(); |
|
683 |
} |
|
684 |
} |
|
685 |
// When collection is parallel, all threads get to cooperate to do |
|
31358
693058672cc6
8077842: Remove the level parameter passed around in GenCollectedHeap
jwilhelm
parents:
31032
diff
changeset
|
686 |
// old generation scanning. |
693058672cc6
8077842: Remove the level parameter passed around in GenCollectedHeap
jwilhelm
parents:
31032
diff
changeset
|
687 |
if (type == YoungGen) { |
29200 | 688 |
older_gens->set_generation(_old_gen); |
30870
3050fdcdc60b
8080112: Replace and remove the last usages of CollectedHeap::n_par_threads()
stefank
parents:
30869
diff
changeset
|
689 |
rem_set()->younger_refs_iterate(_old_gen, older_gens, scope->n_threads()); |
1 | 690 |
older_gens->reset_generation(); |
691 |
} |
|
692 |
||
30869 | 693 |
_process_strong_tasks->all_tasks_completed(scope->n_threads()); |
25492
d27050bdfb04
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
25491
diff
changeset
|
694 |
} |
d27050bdfb04
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
25491
diff
changeset
|
695 |
|
22882
195c8f70d605
8034761: Remove the do_code_roots parameter from process_strong_roots
stefank
parents:
22552
diff
changeset
|
696 |
void GenCollectedHeap::gen_process_weak_roots(OopClosure* root_closure) { |
37106 | 697 |
JNIHandles::weak_oops_do(root_closure); |
29200 | 698 |
_young_gen->ref_processor()->weak_oops_do(root_closure); |
699 |
_old_gen->ref_processor()->weak_oops_do(root_closure); |
|
1 | 700 |
} |
701 |
||
702 |
#define GCH_SINCE_SAVE_MARKS_ITERATE_DEFN(OopClosureType, nv_suffix) \ |
|
703 |
void GenCollectedHeap:: \ |
|
31358
693058672cc6
8077842: Remove the level parameter passed around in GenCollectedHeap
jwilhelm
parents:
31032
diff
changeset
|
704 |
oop_since_save_marks_iterate(GenerationType gen, \ |
1 | 705 |
OopClosureType* cur, \ |
706 |
OopClosureType* older) { \ |
|
31358
693058672cc6
8077842: Remove the level parameter passed around in GenCollectedHeap
jwilhelm
parents:
31032
diff
changeset
|
707 |
if (gen == YoungGen) { \ |
29200 | 708 |
_young_gen->oop_since_save_marks_iterate##nv_suffix(cur); \ |
709 |
_old_gen->oop_since_save_marks_iterate##nv_suffix(older); \ |
|
710 |
} else { \ |
|
711 |
_old_gen->oop_since_save_marks_iterate##nv_suffix(cur); \ |
|
1 | 712 |
} \ |
713 |
} |
|
714 |
||
715 |
ALL_SINCE_SAVE_MARKS_CLOSURES(GCH_SINCE_SAVE_MARKS_ITERATE_DEFN) |
|
716 |
||
717 |
#undef GCH_SINCE_SAVE_MARKS_ITERATE_DEFN |
|
718 |
||
31780 | 719 |
bool GenCollectedHeap::no_allocs_since_save_marks() { |
720 |
return _young_gen->no_allocs_since_save_marks() && |
|
721 |
_old_gen->no_allocs_since_save_marks(); |
|
1 | 722 |
} |
723 |
||
724 |
bool GenCollectedHeap::supports_inline_contig_alloc() const { |
|
29200 | 725 |
return _young_gen->supports_inline_contig_alloc(); |
1 | 726 |
} |
727 |
||
728 |
HeapWord** GenCollectedHeap::top_addr() const { |
|
29200 | 729 |
return _young_gen->top_addr(); |
1 | 730 |
} |
731 |
||
732 |
HeapWord** GenCollectedHeap::end_addr() const { |
|
29200 | 733 |
return _young_gen->end_addr(); |
1 | 734 |
} |
735 |
||
736 |
// public collection interfaces |
|
737 |
||
738 |
void GenCollectedHeap::collect(GCCause::Cause cause) { |
|
739 |
if (should_do_concurrent_full_gc(cause)) { |
|
15482
470d0b0c09f1
8005915: Unify SERIALGC and INCLUDE_ALTERNATE_GCS
jprovino
parents:
14076
diff
changeset
|
740 |
#if INCLUDE_ALL_GCS |
32623
390a27af5657
8134626: Misc cleanups after generation array removal
jwilhelm
parents:
32360
diff
changeset
|
741 |
// Mostly concurrent full collection. |
1 | 742 |
collect_mostly_concurrent(cause); |
15482
470d0b0c09f1
8005915: Unify SERIALGC and INCLUDE_ALTERNATE_GCS
jprovino
parents:
14076
diff
changeset
|
743 |
#else // INCLUDE_ALL_GCS |
1 | 744 |
ShouldNotReachHere(); |
15482
470d0b0c09f1
8005915: Unify SERIALGC and INCLUDE_ALTERNATE_GCS
jprovino
parents:
14076
diff
changeset
|
745 |
#endif // INCLUDE_ALL_GCS |
26183
bbe259d3c8bc
8055098: WB API should be extended to provide information about size and age of object.
tschatzl
parents:
25730
diff
changeset
|
746 |
} else if (cause == GCCause::_wb_young_gc) { |
32623
390a27af5657
8134626: Misc cleanups after generation array removal
jwilhelm
parents:
32360
diff
changeset
|
747 |
// Young collection for the WhiteBox API. |
31358
693058672cc6
8077842: Remove the level parameter passed around in GenCollectedHeap
jwilhelm
parents:
31032
diff
changeset
|
748 |
collect(cause, YoungGen); |
1 | 749 |
} else { |
750 |
#ifdef ASSERT |
|
26183
bbe259d3c8bc
8055098: WB API should be extended to provide information about size and age of object.
tschatzl
parents:
25730
diff
changeset
|
751 |
if (cause == GCCause::_scavenge_alot) { |
32623
390a27af5657
8134626: Misc cleanups after generation array removal
jwilhelm
parents:
32360
diff
changeset
|
752 |
// Young collection only. |
31358
693058672cc6
8077842: Remove the level parameter passed around in GenCollectedHeap
jwilhelm
parents:
31032
diff
changeset
|
753 |
collect(cause, YoungGen); |
26183
bbe259d3c8bc
8055098: WB API should be extended to provide information about size and age of object.
tschatzl
parents:
25730
diff
changeset
|
754 |
} else { |
32623
390a27af5657
8134626: Misc cleanups after generation array removal
jwilhelm
parents:
32360
diff
changeset
|
755 |
// Stop-the-world full collection. |
31358
693058672cc6
8077842: Remove the level parameter passed around in GenCollectedHeap
jwilhelm
parents:
31032
diff
changeset
|
756 |
collect(cause, OldGen); |
26183
bbe259d3c8bc
8055098: WB API should be extended to provide information about size and age of object.
tschatzl
parents:
25730
diff
changeset
|
757 |
} |
1 | 758 |
#else |
32623
390a27af5657
8134626: Misc cleanups after generation array removal
jwilhelm
parents:
32360
diff
changeset
|
759 |
// Stop-the-world full collection. |
31358
693058672cc6
8077842: Remove the level parameter passed around in GenCollectedHeap
jwilhelm
parents:
31032
diff
changeset
|
760 |
collect(cause, OldGen); |
1 | 761 |
#endif |
762 |
} |
|
763 |
} |
|
764 |
||
31358
693058672cc6
8077842: Remove the level parameter passed around in GenCollectedHeap
jwilhelm
parents:
31032
diff
changeset
|
765 |
void GenCollectedHeap::collect(GCCause::Cause cause, GenerationType max_generation) { |
1 | 766 |
// The caller doesn't have the Heap_lock |
767 |
assert(!Heap_lock->owned_by_self(), "this thread should not own the Heap_lock"); |
|
768 |
MutexLocker ml(Heap_lock); |
|
31358
693058672cc6
8077842: Remove the level parameter passed around in GenCollectedHeap
jwilhelm
parents:
31032
diff
changeset
|
769 |
collect_locked(cause, max_generation); |
1 | 770 |
} |
771 |
||
772 |
void GenCollectedHeap::collect_locked(GCCause::Cause cause) { |
|
773 |
// The caller has the Heap_lock |
|
774 |
assert(Heap_lock->owned_by_self(), "this thread should own the Heap_lock"); |
|
31358
693058672cc6
8077842: Remove the level parameter passed around in GenCollectedHeap
jwilhelm
parents:
31032
diff
changeset
|
775 |
collect_locked(cause, OldGen); |
1 | 776 |
} |
777 |
||
778 |
// this is the private collection interface |
|
779 |
// The Heap_lock is expected to be held on entry. |
|
780 |
||
31358
693058672cc6
8077842: Remove the level parameter passed around in GenCollectedHeap
jwilhelm
parents:
31032
diff
changeset
|
781 |
void GenCollectedHeap::collect_locked(GCCause::Cause cause, GenerationType max_generation) { |
1 | 782 |
// Read the GC count while holding the Heap_lock |
783 |
unsigned int gc_count_before = total_collections(); |
|
784 |
unsigned int full_gc_count_before = total_full_collections(); |
|
785 |
{ |
|
786 |
MutexUnlocker mu(Heap_lock); // give up heap lock, execute gets it back |
|
787 |
VM_GenCollectFull op(gc_count_before, full_gc_count_before, |
|
31358
693058672cc6
8077842: Remove the level parameter passed around in GenCollectedHeap
jwilhelm
parents:
31032
diff
changeset
|
788 |
cause, max_generation); |
1 | 789 |
VMThread::execute(&op); |
790 |
} |
|
791 |
} |
|
792 |
||
15482
470d0b0c09f1
8005915: Unify SERIALGC and INCLUDE_ALTERNATE_GCS
jprovino
parents:
14076
diff
changeset
|
793 |
#if INCLUDE_ALL_GCS |
1 | 794 |
bool GenCollectedHeap::create_cms_collector() { |
795 |
||
29200 | 796 |
assert(_old_gen->kind() == Generation::ConcurrentMarkSweep, |
1 | 797 |
"Unexpected generation kinds"); |
798 |
// Skip two header words in the block content verification |
|
799 |
NOT_PRODUCT(_skip_header_HeapWords = CMSCollector::skip_header_HeapWords();) |
|
32735
c6063d028c3c
8134797: Remove explicit casts in CollectorPolicy hierarchy
kbarrett
parents:
32623
diff
changeset
|
800 |
assert(_gen_policy->is_concurrent_mark_sweep_policy(), "Unexpected policy type"); |
c6063d028c3c
8134797: Remove explicit casts in CollectorPolicy hierarchy
kbarrett
parents:
32623
diff
changeset
|
801 |
CMSCollector* collector = |
c6063d028c3c
8134797: Remove explicit casts in CollectorPolicy hierarchy
kbarrett
parents:
32623
diff
changeset
|
802 |
new CMSCollector((ConcurrentMarkSweepGeneration*)_old_gen, |
33212 | 803 |
_rem_set, |
32735
c6063d028c3c
8134797: Remove explicit casts in CollectorPolicy hierarchy
kbarrett
parents:
32623
diff
changeset
|
804 |
_gen_policy->as_concurrent_mark_sweep_policy()); |
1 | 805 |
|
806 |
if (collector == NULL || !collector->completed_initialization()) { |
|
807 |
if (collector) { |
|
808 |
delete collector; // Be nice in embedded situation |
|
809 |
} |
|
810 |
vm_shutdown_during_initialization("Could not create CMS collector"); |
|
811 |
return false; |
|
812 |
} |
|
813 |
return true; // success |
|
814 |
} |
|
815 |
||
816 |
void GenCollectedHeap::collect_mostly_concurrent(GCCause::Cause cause) { |
|
817 |
assert(!Heap_lock->owned_by_self(), "Should not own Heap_lock"); |
|
818 |
||
819 |
MutexLocker ml(Heap_lock); |
|
820 |
// Read the GC counts while holding the Heap_lock |
|
821 |
unsigned int full_gc_count_before = total_full_collections(); |
|
822 |
unsigned int gc_count_before = total_collections(); |
|
823 |
{ |
|
824 |
MutexUnlocker mu(Heap_lock); |
|
825 |
VM_GenCollectFullConcurrent op(gc_count_before, full_gc_count_before, cause); |
|
826 |
VMThread::execute(&op); |
|
827 |
} |
|
828 |
} |
|
15482
470d0b0c09f1
8005915: Unify SERIALGC and INCLUDE_ALTERNATE_GCS
jprovino
parents:
14076
diff
changeset
|
829 |
#endif // INCLUDE_ALL_GCS |
1 | 830 |
|
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
12781
diff
changeset
|
831 |
void GenCollectedHeap::do_full_collection(bool clear_all_soft_refs) { |
31358
693058672cc6
8077842: Remove the level parameter passed around in GenCollectedHeap
jwilhelm
parents:
31032
diff
changeset
|
832 |
do_full_collection(clear_all_soft_refs, OldGen); |
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
12781
diff
changeset
|
833 |
} |
1 | 834 |
|
835 |
void GenCollectedHeap::do_full_collection(bool clear_all_soft_refs, |
|
31358
693058672cc6
8077842: Remove the level parameter passed around in GenCollectedHeap
jwilhelm
parents:
31032
diff
changeset
|
836 |
GenerationType last_generation) { |
693058672cc6
8077842: Remove the level parameter passed around in GenCollectedHeap
jwilhelm
parents:
31032
diff
changeset
|
837 |
GenerationType local_last_generation; |
7419
263dd4e89b9d
7001033: assert(gch->gc_cause() == GCCause::_scavenge_alot || !gch->incremental_collection_failed())
ysr
parents:
7397
diff
changeset
|
838 |
if (!incremental_collection_will_fail(false /* don't consult_young */) && |
1 | 839 |
gc_cause() == GCCause::_gc_locker) { |
31358
693058672cc6
8077842: Remove the level parameter passed around in GenCollectedHeap
jwilhelm
parents:
31032
diff
changeset
|
840 |
local_last_generation = YoungGen; |
1 | 841 |
} else { |
31358
693058672cc6
8077842: Remove the level parameter passed around in GenCollectedHeap
jwilhelm
parents:
31032
diff
changeset
|
842 |
local_last_generation = last_generation; |
1 | 843 |
} |
844 |
||
31358
693058672cc6
8077842: Remove the level parameter passed around in GenCollectedHeap
jwilhelm
parents:
31032
diff
changeset
|
845 |
do_collection(true, // full |
693058672cc6
8077842: Remove the level parameter passed around in GenCollectedHeap
jwilhelm
parents:
31032
diff
changeset
|
846 |
clear_all_soft_refs, // clear_all_soft_refs |
693058672cc6
8077842: Remove the level parameter passed around in GenCollectedHeap
jwilhelm
parents:
31032
diff
changeset
|
847 |
0, // size |
693058672cc6
8077842: Remove the level parameter passed around in GenCollectedHeap
jwilhelm
parents:
31032
diff
changeset
|
848 |
false, // is_tlab |
693058672cc6
8077842: Remove the level parameter passed around in GenCollectedHeap
jwilhelm
parents:
31032
diff
changeset
|
849 |
local_last_generation); // last_generation |
1 | 850 |
// Hack XXX FIX ME !!! |
851 |
// A scavenge may not have been attempted, or may have |
|
852 |
// been attempted and failed, because the old gen was too full |
|
31358
693058672cc6
8077842: Remove the level parameter passed around in GenCollectedHeap
jwilhelm
parents:
31032
diff
changeset
|
853 |
if (local_last_generation == YoungGen && gc_cause() == GCCause::_gc_locker && |
7419
263dd4e89b9d
7001033: assert(gch->gc_cause() == GCCause::_scavenge_alot || !gch->incremental_collection_failed())
ysr
parents:
7397
diff
changeset
|
854 |
incremental_collection_will_fail(false /* don't consult_young */)) { |
35061 | 855 |
log_debug(gc, jni)("GC locker: Trying a full collection because scavenge failed"); |
1 | 856 |
// This time allow the old gen to be collected as well |
31358
693058672cc6
8077842: Remove the level parameter passed around in GenCollectedHeap
jwilhelm
parents:
31032
diff
changeset
|
857 |
do_collection(true, // full |
693058672cc6
8077842: Remove the level parameter passed around in GenCollectedHeap
jwilhelm
parents:
31032
diff
changeset
|
858 |
clear_all_soft_refs, // clear_all_soft_refs |
693058672cc6
8077842: Remove the level parameter passed around in GenCollectedHeap
jwilhelm
parents:
31032
diff
changeset
|
859 |
0, // size |
693058672cc6
8077842: Remove the level parameter passed around in GenCollectedHeap
jwilhelm
parents:
31032
diff
changeset
|
860 |
false, // is_tlab |
693058672cc6
8077842: Remove the level parameter passed around in GenCollectedHeap
jwilhelm
parents:
31032
diff
changeset
|
861 |
OldGen); // last_generation |
1 | 862 |
} |
863 |
} |
|
864 |
||
9935
51267b5e1a3d
7041789: 30% perf regression with c2/arm following 7017732
jmasa
parents:
9623
diff
changeset
|
865 |
bool GenCollectedHeap::is_in_young(oop p) { |
29200 | 866 |
bool result = ((HeapWord*)p) < _old_gen->reserved().start(); |
867 |
assert(result == _young_gen->is_in_reserved(p), |
|
33105
294e48b4f704
8080775: Better argument formatting for assert() and friends
david
parents:
32735
diff
changeset
|
868 |
"incorrect test - result=%d, p=" INTPTR_FORMAT, result, p2i((void*)p)); |
9935
51267b5e1a3d
7041789: 30% perf regression with c2/arm following 7017732
jmasa
parents:
9623
diff
changeset
|
869 |
return result; |
51267b5e1a3d
7041789: 30% perf regression with c2/arm following 7017732
jmasa
parents:
9623
diff
changeset
|
870 |
} |
51267b5e1a3d
7041789: 30% perf regression with c2/arm following 7017732
jmasa
parents:
9623
diff
changeset
|
871 |
|
11247 | 872 |
// Returns "TRUE" iff "p" points into the committed areas of the heap. |
1 | 873 |
bool GenCollectedHeap::is_in(const void* p) const { |
29200 | 874 |
return _young_gen->is_in(p) || _old_gen->is_in(p); |
1 | 875 |
} |
876 |
||
9935
51267b5e1a3d
7041789: 30% perf regression with c2/arm following 7017732
jmasa
parents:
9623
diff
changeset
|
877 |
#ifdef ASSERT |
51267b5e1a3d
7041789: 30% perf regression with c2/arm following 7017732
jmasa
parents:
9623
diff
changeset
|
878 |
// Don't implement this by using is_in_young(). This method is used |
51267b5e1a3d
7041789: 30% perf regression with c2/arm following 7017732
jmasa
parents:
9623
diff
changeset
|
879 |
// in some cases to check that is_in_young() is correct. |
51267b5e1a3d
7041789: 30% perf regression with c2/arm following 7017732
jmasa
parents:
9623
diff
changeset
|
880 |
bool GenCollectedHeap::is_in_partial_collection(const void* p) { |
51267b5e1a3d
7041789: 30% perf regression with c2/arm following 7017732
jmasa
parents:
9623
diff
changeset
|
881 |
assert(is_in_reserved(p) || p == NULL, |
51267b5e1a3d
7041789: 30% perf regression with c2/arm following 7017732
jmasa
parents:
9623
diff
changeset
|
882 |
"Does not work if address is non-null and outside of the heap"); |
29200 | 883 |
return p < _young_gen->reserved().end() && p != NULL; |
1 | 884 |
} |
9935
51267b5e1a3d
7041789: 30% perf regression with c2/arm following 7017732
jmasa
parents:
9623
diff
changeset
|
885 |
#endif |
1 | 886 |
|
30152 | 887 |
void GenCollectedHeap::oop_iterate_no_header(OopClosure* cl) { |
888 |
NoHeaderExtendedOopClosure no_header_cl(cl); |
|
889 |
oop_iterate(&no_header_cl); |
|
890 |
} |
|
891 |
||
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
12781
diff
changeset
|
892 |
void GenCollectedHeap::oop_iterate(ExtendedOopClosure* cl) { |
29200 | 893 |
_young_gen->oop_iterate(cl); |
894 |
_old_gen->oop_iterate(cl); |
|
1 | 895 |
} |
896 |
||
897 |
void GenCollectedHeap::object_iterate(ObjectClosure* cl) { |
|
29200 | 898 |
_young_gen->object_iterate(cl); |
899 |
_old_gen->object_iterate(cl); |
|
1 | 900 |
} |
901 |
||
1893
c82e388e17c5
6689653: JMapPerm fails with UseConcMarkSweepIncGC and compressed oops off
jmasa
parents:
1610
diff
changeset
|
902 |
void GenCollectedHeap::safe_object_iterate(ObjectClosure* cl) { |
29200 | 903 |
_young_gen->safe_object_iterate(cl); |
904 |
_old_gen->safe_object_iterate(cl); |
|
1893
c82e388e17c5
6689653: JMapPerm fails with UseConcMarkSweepIncGC and compressed oops off
jmasa
parents:
1610
diff
changeset
|
905 |
} |
c82e388e17c5
6689653: JMapPerm fails with UseConcMarkSweepIncGC and compressed oops off
jmasa
parents:
1610
diff
changeset
|
906 |
|
1 | 907 |
Space* GenCollectedHeap::space_containing(const void* addr) const { |
29200 | 908 |
Space* res = _young_gen->space_containing(addr); |
909 |
if (res != NULL) { |
|
910 |
return res; |
|
1 | 911 |
} |
29200 | 912 |
res = _old_gen->space_containing(addr); |
913 |
assert(res != NULL, "Could not find containing space"); |
|
914 |
return res; |
|
1 | 915 |
} |
916 |
||
917 |
HeapWord* GenCollectedHeap::block_start(const void* addr) const { |
|
918 |
assert(is_in_reserved(addr), "block_start of address outside of heap"); |
|
29200 | 919 |
if (_young_gen->is_in_reserved(addr)) { |
920 |
assert(_young_gen->is_in(addr), "addr should be in allocated part of generation"); |
|
921 |
return _young_gen->block_start(addr); |
|
1 | 922 |
} |
29200 | 923 |
|
924 |
assert(_old_gen->is_in_reserved(addr), "Some generation should contain the address"); |
|
925 |
assert(_old_gen->is_in(addr), "addr should be in allocated part of generation"); |
|
926 |
return _old_gen->block_start(addr); |
|
1 | 927 |
} |
928 |
||
929 |
size_t GenCollectedHeap::block_size(const HeapWord* addr) const { |
|
930 |
assert(is_in_reserved(addr), "block_size of address outside of heap"); |
|
29200 | 931 |
if (_young_gen->is_in_reserved(addr)) { |
932 |
assert(_young_gen->is_in(addr), "addr should be in allocated part of generation"); |
|
933 |
return _young_gen->block_size(addr); |
|
1 | 934 |
} |
29200 | 935 |
|
936 |
assert(_old_gen->is_in_reserved(addr), "Some generation should contain the address"); |
|
937 |
assert(_old_gen->is_in(addr), "addr should be in allocated part of generation"); |
|
938 |
return _old_gen->block_size(addr); |
|
1 | 939 |
} |
940 |
||
941 |
bool GenCollectedHeap::block_is_obj(const HeapWord* addr) const { |
|
942 |
assert(is_in_reserved(addr), "block_is_obj of address outside of heap"); |
|
943 |
assert(block_start(addr) == addr, "addr must be a block start"); |
|
29200 | 944 |
if (_young_gen->is_in_reserved(addr)) { |
945 |
return _young_gen->block_is_obj(addr); |
|
1 | 946 |
} |
29200 | 947 |
|
948 |
assert(_old_gen->is_in_reserved(addr), "Some generation should contain the address"); |
|
949 |
return _old_gen->block_is_obj(addr); |
|
1 | 950 |
} |
951 |
||
952 |
bool GenCollectedHeap::supports_tlab_allocation() const { |
|
29200 | 953 |
assert(!_old_gen->supports_tlab_allocation(), "Old gen supports TLAB allocation?!"); |
954 |
return _young_gen->supports_tlab_allocation(); |
|
1 | 955 |
} |
956 |
||
957 |
size_t GenCollectedHeap::tlab_capacity(Thread* thr) const { |
|
29200 | 958 |
assert(!_old_gen->supports_tlab_allocation(), "Old gen supports TLAB allocation?!"); |
959 |
if (_young_gen->supports_tlab_allocation()) { |
|
960 |
return _young_gen->tlab_capacity(); |
|
1 | 961 |
} |
29200 | 962 |
return 0; |
1 | 963 |
} |
964 |
||
22552 | 965 |
size_t GenCollectedHeap::tlab_used(Thread* thr) const { |
29200 | 966 |
assert(!_old_gen->supports_tlab_allocation(), "Old gen supports TLAB allocation?!"); |
967 |
if (_young_gen->supports_tlab_allocation()) { |
|
968 |
return _young_gen->tlab_used(); |
|
22552 | 969 |
} |
29200 | 970 |
return 0; |
22552 | 971 |
} |
972 |
||
1 | 973 |
size_t GenCollectedHeap::unsafe_max_tlab_alloc(Thread* thr) const { |
29200 | 974 |
assert(!_old_gen->supports_tlab_allocation(), "Old gen supports TLAB allocation?!"); |
975 |
if (_young_gen->supports_tlab_allocation()) { |
|
976 |
return _young_gen->unsafe_max_tlab_alloc(); |
|
1 | 977 |
} |
29200 | 978 |
return 0; |
1 | 979 |
} |
980 |
||
981 |
HeapWord* GenCollectedHeap::allocate_new_tlab(size_t size) { |
|
982 |
bool gc_overhead_limit_was_exceeded; |
|
35927
58bbbbb4a8c7
8148944: CollectorPolicy methods for memory allocations are specific to GenCollectorPolicy
mgerdin
parents:
35492
diff
changeset
|
983 |
return gen_policy()->mem_allocate_work(size /* size */, |
58bbbbb4a8c7
8148944: CollectorPolicy methods for memory allocations are specific to GenCollectorPolicy
mgerdin
parents:
35492
diff
changeset
|
984 |
true /* is_tlab */, |
58bbbbb4a8c7
8148944: CollectorPolicy methods for memory allocations are specific to GenCollectorPolicy
mgerdin
parents:
35492
diff
changeset
|
985 |
&gc_overhead_limit_was_exceeded); |
1 | 986 |
} |
987 |
||
988 |
// Requires "*prev_ptr" to be non-NULL. Deletes and a block of minimal size |
|
989 |
// from the list headed by "*prev_ptr". |
|
990 |
static ScratchBlock *removeSmallestScratch(ScratchBlock **prev_ptr) { |
|
991 |
bool first = true; |
|
992 |
size_t min_size = 0; // "first" makes this conceptually infinite. |
|
993 |
ScratchBlock **smallest_ptr, *smallest; |
|
994 |
ScratchBlock *cur = *prev_ptr; |
|
995 |
while (cur) { |
|
996 |
assert(*prev_ptr == cur, "just checking"); |
|
997 |
if (first || cur->num_words < min_size) { |
|
998 |
smallest_ptr = prev_ptr; |
|
999 |
smallest = cur; |
|
1000 |
min_size = smallest->num_words; |
|
1001 |
first = false; |
|
1002 |
} |
|
1003 |
prev_ptr = &cur->next; |
|
1004 |
cur = cur->next; |
|
1005 |
} |
|
1006 |
smallest = *smallest_ptr; |
|
1007 |
*smallest_ptr = smallest->next; |
|
1008 |
return smallest; |
|
1009 |
} |
|
1010 |
||
1011 |
// Sort the scratch block list headed by res into decreasing size order, |
|
1012 |
// and set "res" to the result. |
|
1013 |
static void sort_scratch_list(ScratchBlock*& list) { |
|
1014 |
ScratchBlock* sorted = NULL; |
|
1015 |
ScratchBlock* unsorted = list; |
|
1016 |
while (unsorted) { |
|
1017 |
ScratchBlock *smallest = removeSmallestScratch(&unsorted); |
|
1018 |
smallest->next = sorted; |
|
1019 |
sorted = smallest; |
|
1020 |
} |
|
1021 |
list = sorted; |
|
1022 |
} |
|
1023 |
||
1024 |
ScratchBlock* GenCollectedHeap::gather_scratch(Generation* requestor, |
|
1025 |
size_t max_alloc_words) { |
|
1026 |
ScratchBlock* res = NULL; |
|
29200 | 1027 |
_young_gen->contribute_scratch(res, requestor, max_alloc_words); |
1028 |
_old_gen->contribute_scratch(res, requestor, max_alloc_words); |
|
1 | 1029 |
sort_scratch_list(res); |
1030 |
return res; |
|
1031 |
} |
|
1032 |
||
971
f0b20be4165d
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
360
diff
changeset
|
1033 |
void GenCollectedHeap::release_scratch() { |
29200 | 1034 |
_young_gen->reset_scratch(); |
1035 |
_old_gen->reset_scratch(); |
|
971
f0b20be4165d
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
360
diff
changeset
|
1036 |
} |
f0b20be4165d
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
360
diff
changeset
|
1037 |
|
1 | 1038 |
class GenPrepareForVerifyClosure: public GenCollectedHeap::GenClosure { |
1039 |
void do_generation(Generation* gen) { |
|
1040 |
gen->prepare_for_verify(); |
|
1041 |
} |
|
1042 |
}; |
|
1043 |
||
1044 |
void GenCollectedHeap::prepare_for_verify() { |
|
1045 |
ensure_parsability(false); // no need to retire TLABs |
|
1046 |
GenPrepareForVerifyClosure blk; |
|
1047 |
generation_iterate(&blk, false); |
|
1048 |
} |
|
1049 |
||
1050 |
void GenCollectedHeap::generation_iterate(GenClosure* cl, |
|
1051 |
bool old_to_young) { |
|
1052 |
if (old_to_young) { |
|
29200 | 1053 |
cl->do_generation(_old_gen); |
1054 |
cl->do_generation(_young_gen); |
|
1 | 1055 |
} else { |
29200 | 1056 |
cl->do_generation(_young_gen); |
1057 |
cl->do_generation(_old_gen); |
|
1 | 1058 |
} |
1059 |
} |
|
1060 |
||
1061 |
bool GenCollectedHeap::is_maximal_no_gc() const { |
|
29200 | 1062 |
return _young_gen->is_maximal_no_gc() && _old_gen->is_maximal_no_gc(); |
1 | 1063 |
} |
1064 |
||
1065 |
void GenCollectedHeap::save_marks() { |
|
29200 | 1066 |
_young_gen->save_marks(); |
1067 |
_old_gen->save_marks(); |
|
1 | 1068 |
} |
1069 |
||
1070 |
GenCollectedHeap* GenCollectedHeap::heap() { |
|
30258
413e15d1b146
8077415: Remove duplicate variables holding the CollectedHeap
pliden
parents:
30177
diff
changeset
|
1071 |
CollectedHeap* heap = Universe::heap(); |
413e15d1b146
8077415: Remove duplicate variables holding the CollectedHeap
pliden
parents:
30177
diff
changeset
|
1072 |
assert(heap != NULL, "Uninitialized access to GenCollectedHeap::heap()"); |
413e15d1b146
8077415: Remove duplicate variables holding the CollectedHeap
pliden
parents:
30177
diff
changeset
|
1073 |
assert(heap->kind() == CollectedHeap::GenCollectedHeap, "Not a GenCollectedHeap"); |
413e15d1b146
8077415: Remove duplicate variables holding the CollectedHeap
pliden
parents:
30177
diff
changeset
|
1074 |
return (GenCollectedHeap*)heap; |
1 | 1075 |
} |
1076 |
||
1077 |
void GenCollectedHeap::prepare_for_compaction() { |
|
1078 |
// Start by compacting into same gen. |
|
29200 | 1079 |
CompactPoint cp(_old_gen); |
1080 |
_old_gen->prepare_for_compaction(&cp); |
|
1081 |
_young_gen->prepare_for_compaction(&cp); |
|
1 | 1082 |
} |
1083 |
||
35061 | 1084 |
void GenCollectedHeap::verify(VerifyOption option /* ignored */) { |
1085 |
log_debug(gc, verify)("%s", _old_gen->name()); |
|
29200 | 1086 |
_old_gen->verify(); |
1087 |
||
35061 | 1088 |
log_debug(gc, verify)("%s", _old_gen->name()); |
29200 | 1089 |
_young_gen->verify(); |
1090 |
||
35061 | 1091 |
log_debug(gc, verify)("RemSet"); |
1 | 1092 |
rem_set()->verify(); |
1093 |
} |
|
1094 |
||
1095 |
void GenCollectedHeap::print_on(outputStream* st) const { |
|
29200 | 1096 |
_young_gen->print_on(st); |
1097 |
_old_gen->print_on(st); |
|
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
12781
diff
changeset
|
1098 |
MetaspaceAux::print_on(st); |
1 | 1099 |
} |
1100 |
||
1101 |
void GenCollectedHeap::gc_threads_do(ThreadClosure* tc) const { |
|
1102 |
if (workers() != NULL) { |
|
1103 |
workers()->threads_do(tc); |
|
1104 |
} |
|
15482
470d0b0c09f1
8005915: Unify SERIALGC and INCLUDE_ALTERNATE_GCS
jprovino
parents:
14076
diff
changeset
|
1105 |
#if INCLUDE_ALL_GCS |
1 | 1106 |
if (UseConcMarkSweepGC) { |
1107 |
ConcurrentMarkSweepThread::threads_do(tc); |
|
1108 |
} |
|
15482
470d0b0c09f1
8005915: Unify SERIALGC and INCLUDE_ALTERNATE_GCS
jprovino
parents:
14076
diff
changeset
|
1109 |
#endif // INCLUDE_ALL_GCS |
1 | 1110 |
} |
1111 |
||
1112 |
void GenCollectedHeap::print_gc_threads_on(outputStream* st) const { |
|
15482
470d0b0c09f1
8005915: Unify SERIALGC and INCLUDE_ALTERNATE_GCS
jprovino
parents:
14076
diff
changeset
|
1113 |
#if INCLUDE_ALL_GCS |
27898
813ad96387b3
8065972: Remove support for ParNew+SerialOld and DefNew+CMS
brutisso
parents:
27887
diff
changeset
|
1114 |
if (UseConcMarkSweepGC) { |
1 | 1115 |
workers()->print_worker_threads_on(st); |
1116 |
ConcurrentMarkSweepThread::print_all_on(st); |
|
1117 |
} |
|
15482
470d0b0c09f1
8005915: Unify SERIALGC and INCLUDE_ALTERNATE_GCS
jprovino
parents:
14076
diff
changeset
|
1118 |
#endif // INCLUDE_ALL_GCS |
1 | 1119 |
} |
1120 |
||
16685
41c34debcde0
8011872: Include Bit Map addresses in the hs_err files
stefank
parents:
16680
diff
changeset
|
1121 |
void GenCollectedHeap::print_on_error(outputStream* st) const { |
41c34debcde0
8011872: Include Bit Map addresses in the hs_err files
stefank
parents:
16680
diff
changeset
|
1122 |
this->CollectedHeap::print_on_error(st); |
41c34debcde0
8011872: Include Bit Map addresses in the hs_err files
stefank
parents:
16680
diff
changeset
|
1123 |
|
41c34debcde0
8011872: Include Bit Map addresses in the hs_err files
stefank
parents:
16680
diff
changeset
|
1124 |
#if INCLUDE_ALL_GCS |
41c34debcde0
8011872: Include Bit Map addresses in the hs_err files
stefank
parents:
16680
diff
changeset
|
1125 |
if (UseConcMarkSweepGC) { |
41c34debcde0
8011872: Include Bit Map addresses in the hs_err files
stefank
parents:
16680
diff
changeset
|
1126 |
st->cr(); |
41c34debcde0
8011872: Include Bit Map addresses in the hs_err files
stefank
parents:
16680
diff
changeset
|
1127 |
CMSCollector::print_on_error(st); |
41c34debcde0
8011872: Include Bit Map addresses in the hs_err files
stefank
parents:
16680
diff
changeset
|
1128 |
} |
41c34debcde0
8011872: Include Bit Map addresses in the hs_err files
stefank
parents:
16680
diff
changeset
|
1129 |
#endif // INCLUDE_ALL_GCS |
41c34debcde0
8011872: Include Bit Map addresses in the hs_err files
stefank
parents:
16680
diff
changeset
|
1130 |
} |
41c34debcde0
8011872: Include Bit Map addresses in the hs_err files
stefank
parents:
16680
diff
changeset
|
1131 |
|
1 | 1132 |
void GenCollectedHeap::print_tracing_info() const { |
24941
4ebbe176a7b1
8042298: Remove the names gen0 and gen1 from the GC code
jwilhelm
parents:
24424
diff
changeset
|
1133 |
if (TraceYoungGenTime) { |
29684
a36d90acae41
8057632: Remove auxiliary code used to handle the generations array
jwilhelm
parents:
29200
diff
changeset
|
1134 |
_young_gen->print_summary_info(); |
1 | 1135 |
} |
24941
4ebbe176a7b1
8042298: Remove the names gen0 and gen1 from the GC code
jwilhelm
parents:
24424
diff
changeset
|
1136 |
if (TraceOldGenTime) { |
29684
a36d90acae41
8057632: Remove auxiliary code used to handle the generations array
jwilhelm
parents:
29200
diff
changeset
|
1137 |
_old_gen->print_summary_info(); |
1 | 1138 |
} |
1139 |
} |
|
1140 |
||
35061 | 1141 |
void GenCollectedHeap::print_heap_change(size_t young_prev_used, size_t old_prev_used) const { |
1142 |
log_info(gc, heap)("%s: " SIZE_FORMAT "K->" SIZE_FORMAT "K(" SIZE_FORMAT "K)", |
|
1143 |
_young_gen->short_name(), young_prev_used / K, _young_gen->used() /K, _young_gen->capacity() /K); |
|
1144 |
log_info(gc, heap)("%s: " SIZE_FORMAT "K->" SIZE_FORMAT "K(" SIZE_FORMAT "K)", |
|
1145 |
_old_gen->short_name(), old_prev_used / K, _old_gen->used() /K, _old_gen->capacity() /K); |
|
1 | 1146 |
} |
1147 |
||
1148 |
class GenGCPrologueClosure: public GenCollectedHeap::GenClosure { |
|
1149 |
private: |
|
1150 |
bool _full; |
|
1151 |
public: |
|
1152 |
void do_generation(Generation* gen) { |
|
1153 |
gen->gc_prologue(_full); |
|
1154 |
} |
|
1155 |
GenGCPrologueClosure(bool full) : _full(full) {}; |
|
1156 |
}; |
|
1157 |
||
1158 |
void GenCollectedHeap::gc_prologue(bool full) { |
|
1159 |
assert(InlineCacheBuffer::is_empty(), "should have cleaned up ICBuffer"); |
|
1160 |
||
1161 |
always_do_update_barrier = false; |
|
1162 |
// Fill TLAB's and such |
|
1163 |
CollectedHeap::accumulate_statistics_all_tlabs(); |
|
1164 |
ensure_parsability(true); // retire TLABs |
|
1165 |
||
1166 |
// Walk generations |
|
1167 |
GenGCPrologueClosure blk(full); |
|
1168 |
generation_iterate(&blk, false); // not old-to-young. |
|
1169 |
}; |
|
1170 |
||
1171 |
class GenGCEpilogueClosure: public GenCollectedHeap::GenClosure { |
|
1172 |
private: |
|
1173 |
bool _full; |
|
1174 |
public: |
|
1175 |
void do_generation(Generation* gen) { |
|
1176 |
gen->gc_epilogue(_full); |
|
1177 |
} |
|
1178 |
GenGCEpilogueClosure(bool full) : _full(full) {}; |
|
1179 |
}; |
|
1180 |
||
1181 |
void GenCollectedHeap::gc_epilogue(bool full) { |
|
33160
c59f1676d27e
8136421: JEP 243: Java-Level JVM Compiler Interface
twisti
parents:
32735
diff
changeset
|
1182 |
#if defined(COMPILER2) || INCLUDE_JVMCI |
1 | 1183 |
assert(DerivedPointerTable::is_empty(), "derived pointer present"); |
1184 |
size_t actual_gap = pointer_delta((HeapWord*) (max_uintx-3), *(end_addr())); |
|
1185 |
guarantee(actual_gap > (size_t)FastAllocateSizeLimit, "inline allocation wraps"); |
|
33160
c59f1676d27e
8136421: JEP 243: Java-Level JVM Compiler Interface
twisti
parents:
32735
diff
changeset
|
1186 |
#endif /* COMPILER2 || INCLUDE_JVMCI */ |
1 | 1187 |
|
1188 |
resize_all_tlabs(); |
|
1189 |
||
1190 |
GenGCEpilogueClosure blk(full); |
|
1191 |
generation_iterate(&blk, false); // not old-to-young. |
|
1192 |
||
10022
377345fb5fb5
7061204: clean the chunk table synchronously in embedded builds
jcoomes
parents:
9997
diff
changeset
|
1193 |
if (!CleanChunkPoolAsync) { |
377345fb5fb5
7061204: clean the chunk table synchronously in embedded builds
jcoomes
parents:
9997
diff
changeset
|
1194 |
Chunk::clean_chunk_pool(); |
377345fb5fb5
7061204: clean the chunk table synchronously in embedded builds
jcoomes
parents:
9997
diff
changeset
|
1195 |
} |
377345fb5fb5
7061204: clean the chunk table synchronously in embedded builds
jcoomes
parents:
9997
diff
changeset
|
1196 |
|
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
12781
diff
changeset
|
1197 |
MetaspaceCounters::update_performance_counters(); |
19322
e35f9ed4f081
8014659: NPG: performance counters for compressed klass space
ehelin
parents:
19286
diff
changeset
|
1198 |
CompressedClassSpaceCounters::update_performance_counters(); |
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
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changeset
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1199 |
|
1 | 1200 |
always_do_update_barrier = UseConcMarkSweepGC; |
1201 |
}; |
|
1202 |
||
971
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6672698: mangle_unused_area() should not remangle the entire heap at each collection.
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changeset
|
1203 |
#ifndef PRODUCT |
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|
1204 |
class GenGCSaveTopsBeforeGCClosure: public GenCollectedHeap::GenClosure { |
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changeset
|
1205 |
private: |
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changeset
|
1206 |
public: |
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changeset
|
1207 |
void do_generation(Generation* gen) { |
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changeset
|
1208 |
gen->record_spaces_top(); |
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changeset
|
1209 |
} |
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changeset
|
1210 |
}; |
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changeset
|
1211 |
|
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6672698: mangle_unused_area() should not remangle the entire heap at each collection.
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changeset
|
1212 |
void GenCollectedHeap::record_gen_tops_before_GC() { |
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changeset
|
1213 |
if (ZapUnusedHeapArea) { |
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changeset
|
1214 |
GenGCSaveTopsBeforeGCClosure blk; |
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changeset
|
1215 |
generation_iterate(&blk, false); // not old-to-young. |
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changeset
|
1216 |
} |
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changeset
|
1217 |
} |
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changeset
|
1218 |
#endif // not PRODUCT |
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changeset
|
1219 |
|
1 | 1220 |
class GenEnsureParsabilityClosure: public GenCollectedHeap::GenClosure { |
1221 |
public: |
|
1222 |
void do_generation(Generation* gen) { |
|
1223 |
gen->ensure_parsability(); |
|
1224 |
} |
|
1225 |
}; |
|
1226 |
||
1227 |
void GenCollectedHeap::ensure_parsability(bool retire_tlabs) { |
|
1228 |
CollectedHeap::ensure_parsability(retire_tlabs); |
|
1229 |
GenEnsureParsabilityClosure ep_cl; |
|
1230 |
generation_iterate(&ep_cl, false); |
|
1231 |
} |
|
1232 |
||
19286
48394008c803
8022800: Use specific generations rather than generation iteration
brutisso
parents:
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diff
changeset
|
1233 |
oop GenCollectedHeap::handle_failed_promotion(Generation* old_gen, |
1 | 1234 |
oop obj, |
360
21d113ecbf6a
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
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parents:
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diff
changeset
|
1235 |
size_t obj_size) { |
31358
693058672cc6
8077842: Remove the level parameter passed around in GenCollectedHeap
jwilhelm
parents:
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diff
changeset
|
1236 |
guarantee(old_gen == _old_gen, "We only get here with an old generation"); |
1 | 1237 |
assert(obj_size == (size_t)obj->size(), "bad obj_size passed in"); |
1238 |
HeapWord* result = NULL; |
|
1239 |
||
19286
48394008c803
8022800: Use specific generations rather than generation iteration
brutisso
parents:
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diff
changeset
|
1240 |
result = old_gen->expand_and_allocate(obj_size, false); |
1 | 1241 |
|
1242 |
if (result != NULL) { |
|
1243 |
Copy::aligned_disjoint_words((HeapWord*)obj, result, obj_size); |
|
1244 |
} |
|
1245 |
return oop(result); |
|
1246 |
} |
|
1247 |
||
1248 |
class GenTimeOfLastGCClosure: public GenCollectedHeap::GenClosure { |
|
1249 |
jlong _time; // in ms |
|
1250 |
jlong _now; // in ms |
|
1251 |
||
1252 |
public: |
|
1253 |
GenTimeOfLastGCClosure(jlong now) : _time(now), _now(now) { } |
|
1254 |
||
1255 |
jlong time() { return _time; } |
|
1256 |
||
1257 |
void do_generation(Generation* gen) { |
|
1258 |
_time = MIN2(_time, gen->time_of_last_gc(_now)); |
|
1259 |
} |
|
1260 |
}; |
|
1261 |
||
1262 |
jlong GenCollectedHeap::millis_since_last_gc() { |
|
22551 | 1263 |
// We need a monotonically non-decreasing time in ms but |
11251
e29da6b5622b
7117303: VM uses non-monotonic time source and complains that it is non-monotonic
johnc
parents:
11247
diff
changeset
|
1264 |
// os::javaTimeMillis() does not guarantee monotonicity. |
e29da6b5622b
7117303: VM uses non-monotonic time source and complains that it is non-monotonic
johnc
parents:
11247
diff
changeset
|
1265 |
jlong now = os::javaTimeNanos() / NANOSECS_PER_MILLISEC; |
1 | 1266 |
GenTimeOfLastGCClosure tolgc_cl(now); |
1267 |
// iterate over generations getting the oldest |
|
1268 |
// time that a generation was collected |
|
1269 |
generation_iterate(&tolgc_cl, false); |
|
11251
e29da6b5622b
7117303: VM uses non-monotonic time source and complains that it is non-monotonic
johnc
parents:
11247
diff
changeset
|
1270 |
|
e29da6b5622b
7117303: VM uses non-monotonic time source and complains that it is non-monotonic
johnc
parents:
11247
diff
changeset
|
1271 |
// javaTimeNanos() is guaranteed to be monotonically non-decreasing |
e29da6b5622b
7117303: VM uses non-monotonic time source and complains that it is non-monotonic
johnc
parents:
11247
diff
changeset
|
1272 |
// provided the underlying platform provides such a time source |
e29da6b5622b
7117303: VM uses non-monotonic time source and complains that it is non-monotonic
johnc
parents:
11247
diff
changeset
|
1273 |
// (and it is bug free). So we still have to guard against getting |
e29da6b5622b
7117303: VM uses non-monotonic time source and complains that it is non-monotonic
johnc
parents:
11247
diff
changeset
|
1274 |
// back a time later than 'now'. |
1 | 1275 |
jlong retVal = now - tolgc_cl.time(); |
1276 |
if (retVal < 0) { |
|
37073
c39d0903390b
8151605: Change warning() to log_warning(gc) in the GC code
brutisso
parents:
36591
diff
changeset
|
1277 |
NOT_PRODUCT(log_warning(gc)("time warp: " JLONG_FORMAT, retVal);) |
1 | 1278 |
return 0; |
1279 |
} |
|
1280 |
return retVal; |
|
1281 |
} |
|
34133
5d761539ac2c
8141356: Explicitly stop CMS threads during VM termination.
jwha
parents:
33580
diff
changeset
|
1282 |
|
5d761539ac2c
8141356: Explicitly stop CMS threads during VM termination.
jwha
parents:
33580
diff
changeset
|
1283 |
void GenCollectedHeap::stop() { |
5d761539ac2c
8141356: Explicitly stop CMS threads during VM termination.
jwha
parents:
33580
diff
changeset
|
1284 |
#if INCLUDE_ALL_GCS |
5d761539ac2c
8141356: Explicitly stop CMS threads during VM termination.
jwha
parents:
33580
diff
changeset
|
1285 |
if (UseConcMarkSweepGC) { |
37081
7656f5356a5d
8140257: Add support for "gc service threads" to ConcurrentGCThread
drwhite
parents:
37073
diff
changeset
|
1286 |
ConcurrentMarkSweepThread::cmst()->stop(); |
34133
5d761539ac2c
8141356: Explicitly stop CMS threads during VM termination.
jwha
parents:
33580
diff
changeset
|
1287 |
} |
5d761539ac2c
8141356: Explicitly stop CMS threads during VM termination.
jwha
parents:
33580
diff
changeset
|
1288 |
#endif |
5d761539ac2c
8141356: Explicitly stop CMS threads during VM termination.
jwha
parents:
33580
diff
changeset
|
1289 |
} |