author | jmasa |
Tue, 12 Mar 2013 11:00:49 -0700 | |
changeset 15959 | 9a29e0e3a633 |
parent 13728 | 882756847a04 |
child 16386 | e436eb52ae05 |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2001, 2012, 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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#include "precompiled.hpp" |
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#include "gc_implementation/parallelScavenge/adjoiningGenerations.hpp" |
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#include "gc_implementation/parallelScavenge/adjoiningVirtualSpaces.hpp" |
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#include "gc_implementation/parallelScavenge/cardTableExtension.hpp" |
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#include "gc_implementation/parallelScavenge/gcTaskManager.hpp" |
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#include "gc_implementation/parallelScavenge/generationSizer.hpp" |
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#include "gc_implementation/parallelScavenge/parallelScavengeHeap.inline.hpp" |
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#include "gc_implementation/parallelScavenge/psAdaptiveSizePolicy.hpp" |
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#include "gc_implementation/parallelScavenge/psMarkSweep.hpp" |
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#include "gc_implementation/parallelScavenge/psParallelCompact.hpp" |
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#include "gc_implementation/parallelScavenge/psPromotionManager.hpp" |
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#include "gc_implementation/parallelScavenge/psScavenge.hpp" |
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#include "gc_implementation/parallelScavenge/vmPSOperations.hpp" |
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#include "memory/gcLocker.inline.hpp" |
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#include "oops/oop.inline.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/memTracker.hpp" |
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#include "utilities/vmError.hpp" |
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PSYoungGen* ParallelScavengeHeap::_young_gen = NULL; |
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PSOldGen* ParallelScavengeHeap::_old_gen = NULL; |
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PSAdaptiveSizePolicy* ParallelScavengeHeap::_size_policy = NULL; |
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PSGCAdaptivePolicyCounters* ParallelScavengeHeap::_gc_policy_counters = NULL; |
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ParallelScavengeHeap* ParallelScavengeHeap::_psh = NULL; |
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GCTaskManager* ParallelScavengeHeap::_gc_task_manager = NULL; |
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static void trace_gen_sizes(const char* const str, |
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size_t og_min, size_t og_max, |
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size_t yg_min, size_t yg_max) |
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{ |
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if (TracePageSizes) { |
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tty->print_cr("%s: " SIZE_FORMAT "," SIZE_FORMAT " " |
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SIZE_FORMAT "," SIZE_FORMAT " " |
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SIZE_FORMAT, |
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str, |
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og_min / K, og_max / K, |
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yg_min / K, yg_max / K, |
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(og_max + yg_max) / K); |
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} |
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} |
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jint ParallelScavengeHeap::initialize() { |
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CollectedHeap::pre_initialize(); |
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// Cannot be initialized until after the flags are parsed |
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// GenerationSizer flag_parser; |
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_collector_policy = new GenerationSizer(); |
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size_t yg_min_size = _collector_policy->min_young_gen_size(); |
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size_t yg_max_size = _collector_policy->max_young_gen_size(); |
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size_t og_min_size = _collector_policy->min_old_gen_size(); |
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size_t og_max_size = _collector_policy->max_old_gen_size(); |
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trace_gen_sizes("ps heap raw", |
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og_min_size, og_max_size, |
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yg_min_size, yg_max_size); |
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const size_t og_page_sz = os::page_size_for_region(yg_min_size + og_min_size, |
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yg_max_size + og_max_size, |
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8); |
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const size_t og_align = set_alignment(_old_gen_alignment, og_page_sz); |
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const size_t yg_align = set_alignment(_young_gen_alignment, og_page_sz); |
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// Update sizes to reflect the selected page size(s). |
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// |
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// NEEDS_CLEANUP. The default TwoGenerationCollectorPolicy uses NewRatio; it |
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// should check UseAdaptiveSizePolicy. Changes from generationSizer could |
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// move to the common code. |
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yg_min_size = align_size_up(yg_min_size, yg_align); |
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yg_max_size = align_size_up(yg_max_size, yg_align); |
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size_t yg_cur_size = |
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align_size_up(_collector_policy->young_gen_size(), yg_align); |
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yg_cur_size = MAX2(yg_cur_size, yg_min_size); |
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og_min_size = align_size_up(og_min_size, og_align); |
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// Align old gen size down to preserve specified heap size. |
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assert(og_align == yg_align, "sanity"); |
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og_max_size = align_size_down(og_max_size, og_align); |
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og_max_size = MAX2(og_max_size, og_min_size); |
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size_t og_cur_size = |
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align_size_down(_collector_policy->old_gen_size(), og_align); |
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og_cur_size = MAX2(og_cur_size, og_min_size); |
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trace_gen_sizes("ps heap rnd", |
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og_min_size, og_max_size, |
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yg_min_size, yg_max_size); |
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const size_t heap_size = og_max_size + yg_max_size; |
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ReservedSpace heap_rs = Universe::reserve_heap(heap_size, og_align); |
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MemTracker::record_virtual_memory_type((address)heap_rs.base(), mtJavaHeap); |
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os::trace_page_sizes("ps main", og_min_size + yg_min_size, |
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og_max_size + yg_max_size, og_page_sz, |
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heap_rs.base(), |
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heap_rs.size()); |
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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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_reserved = MemRegion((HeapWord*)heap_rs.base(), |
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(HeapWord*)(heap_rs.base() + heap_rs.size())); |
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CardTableExtension* const barrier_set = new CardTableExtension(_reserved, 3); |
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_barrier_set = barrier_set; |
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oopDesc::set_bs(_barrier_set); |
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if (_barrier_set == NULL) { |
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vm_shutdown_during_initialization( |
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"Could not reserve enough space for barrier set"); |
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return JNI_ENOMEM; |
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} |
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// Initial young gen size is 4 Mb |
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// |
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// XXX - what about flag_parser.young_gen_size()? |
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const size_t init_young_size = align_size_up(4 * M, yg_align); |
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yg_cur_size = MAX2(MIN2(init_young_size, yg_max_size), yg_cur_size); |
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// Make up the generations |
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// Calculate the maximum size that a generation can grow. This |
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// includes growth into the other generation. Note that the |
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// parameter _max_gen_size is kept as the maximum |
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// size of the generation as the boundaries currently stand. |
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// _max_gen_size is still used as that value. |
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double max_gc_pause_sec = ((double) MaxGCPauseMillis)/1000.0; |
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double max_gc_minor_pause_sec = ((double) MaxGCMinorPauseMillis)/1000.0; |
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_gens = new AdjoiningGenerations(heap_rs, |
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og_cur_size, |
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og_min_size, |
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og_max_size, |
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yg_cur_size, |
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yg_min_size, |
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yg_max_size, |
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yg_align); |
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_old_gen = _gens->old_gen(); |
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_young_gen = _gens->young_gen(); |
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const size_t eden_capacity = _young_gen->eden_space()->capacity_in_bytes(); |
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const size_t old_capacity = _old_gen->capacity_in_bytes(); |
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const size_t initial_promo_size = MIN2(eden_capacity, old_capacity); |
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_size_policy = |
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new PSAdaptiveSizePolicy(eden_capacity, |
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initial_promo_size, |
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young_gen()->to_space()->capacity_in_bytes(), |
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intra_heap_alignment(), |
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max_gc_pause_sec, |
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max_gc_minor_pause_sec, |
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GCTimeRatio |
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); |
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assert(!UseAdaptiveGCBoundary || |
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(old_gen()->virtual_space()->high_boundary() == |
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young_gen()->virtual_space()->low_boundary()), |
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"Boundaries must meet"); |
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// initialize the policy counters - 2 collectors, 3 generations |
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_gc_policy_counters = |
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new PSGCAdaptivePolicyCounters("ParScav:MSC", 2, 3, _size_policy); |
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_psh = this; |
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// Set up the GCTaskManager |
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_gc_task_manager = GCTaskManager::create(ParallelGCThreads); |
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if (UseParallelOldGC && !PSParallelCompact::initialize()) { |
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return JNI_ENOMEM; |
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} |
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return JNI_OK; |
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} |
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void ParallelScavengeHeap::post_initialize() { |
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// Need to init the tenuring threshold |
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PSScavenge::initialize(); |
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if (UseParallelOldGC) { |
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PSParallelCompact::post_initialize(); |
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} else { |
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PSMarkSweep::initialize(); |
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} |
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PSPromotionManager::initialize(); |
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} |
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void ParallelScavengeHeap::update_counters() { |
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young_gen()->update_counters(); |
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old_gen()->update_counters(); |
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MetaspaceCounters::update_performance_counters(); |
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} |
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size_t ParallelScavengeHeap::capacity() const { |
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size_t value = young_gen()->capacity_in_bytes() + old_gen()->capacity_in_bytes(); |
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return value; |
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} |
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size_t ParallelScavengeHeap::used() const { |
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size_t value = young_gen()->used_in_bytes() + old_gen()->used_in_bytes(); |
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return value; |
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} |
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bool ParallelScavengeHeap::is_maximal_no_gc() const { |
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return old_gen()->is_maximal_no_gc() && young_gen()->is_maximal_no_gc(); |
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} |
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size_t ParallelScavengeHeap::max_capacity() const { |
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size_t estimated = reserved_region().byte_size(); |
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if (UseAdaptiveSizePolicy) { |
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estimated -= _size_policy->max_survivor_size(young_gen()->max_size()); |
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} else { |
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estimated -= young_gen()->to_space()->capacity_in_bytes(); |
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} |
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return MAX2(estimated, capacity()); |
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} |
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bool ParallelScavengeHeap::is_in(const void* p) const { |
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if (young_gen()->is_in(p)) { |
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return true; |
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} |
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if (old_gen()->is_in(p)) { |
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return true; |
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} |
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return false; |
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} |
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bool ParallelScavengeHeap::is_in_reserved(const void* p) const { |
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if (young_gen()->is_in_reserved(p)) { |
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return true; |
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} |
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if (old_gen()->is_in_reserved(p)) { |
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return true; |
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} |
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return false; |
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} |
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bool ParallelScavengeHeap::is_scavengable(const void* addr) { |
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return is_in_young((oop)addr); |
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} |
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#ifdef ASSERT |
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// Don't implement this by using is_in_young(). This method is used |
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// in some cases to check that is_in_young() is correct. |
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bool ParallelScavengeHeap::is_in_partial_collection(const void *p) { |
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assert(is_in_reserved(p) || p == NULL, |
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"Does not work if address is non-null and outside of the heap"); |
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// The order of the generations is old (low addr), young (high addr) |
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return p >= old_gen()->reserved().end(); |
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} |
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#endif |
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// There are two levels of allocation policy here. |
284 |
// |
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// When an allocation request fails, the requesting thread must invoke a VM |
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// operation, transfer control to the VM thread, and await the results of a |
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// garbage collection. That is quite expensive, and we should avoid doing it |
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// multiple times if possible. |
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// |
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// To accomplish this, we have a basic allocation policy, and also a |
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// failed allocation policy. |
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// |
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// The basic allocation policy controls how you allocate memory without |
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// attempting garbage collection. It is okay to grab locks and |
|
295 |
// expand the heap, if that can be done without coming to a safepoint. |
|
296 |
// It is likely that the basic allocation policy will not be very |
|
297 |
// aggressive. |
|
298 |
// |
|
299 |
// The failed allocation policy is invoked from the VM thread after |
|
300 |
// the basic allocation policy is unable to satisfy a mem_allocate |
|
301 |
// request. This policy needs to cover the entire range of collection, |
|
302 |
// heap expansion, and out-of-memory conditions. It should make every |
|
303 |
// attempt to allocate the requested memory. |
|
304 |
||
305 |
// Basic allocation policy. Should never be called at a safepoint, or |
|
306 |
// from the VM thread. |
|
307 |
// |
|
308 |
// This method must handle cases where many mem_allocate requests fail |
|
309 |
// simultaneously. When that happens, only one VM operation will succeed, |
|
310 |
// and the rest will not be executed. For that reason, this method loops |
|
311 |
// during failed allocation attempts. If the java heap becomes exhausted, |
|
312 |
// we rely on the size_policy object to force a bail out. |
|
313 |
HeapWord* ParallelScavengeHeap::mem_allocate( |
|
314 |
size_t size, |
|
315 |
bool* gc_overhead_limit_was_exceeded) { |
|
316 |
assert(!SafepointSynchronize::is_at_safepoint(), "should not be at safepoint"); |
|
317 |
assert(Thread::current() != (Thread*)VMThread::vm_thread(), "should not be in vm thread"); |
|
318 |
assert(!Heap_lock->owned_by_self(), "this thread should not own the Heap_lock"); |
|
319 |
||
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|
320 |
// In general gc_overhead_limit_was_exceeded should be false so |
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changeset
|
321 |
// set it so here and reset it to true only if the gc time |
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|
322 |
// limit is being exceeded as checked below. |
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|
323 |
*gc_overhead_limit_was_exceeded = false; |
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|
324 |
|
9997
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|
325 |
HeapWord* result = young_gen()->allocate(size); |
1 | 326 |
|
327 |
uint loop_count = 0; |
|
328 |
uint gc_count = 0; |
|
329 |
||
330 |
while (result == NULL) { |
|
331 |
// We don't want to have multiple collections for a single filled generation. |
|
332 |
// To prevent this, each thread tracks the total_collections() value, and if |
|
333 |
// the count has changed, does not do a new collection. |
|
334 |
// |
|
335 |
// The collection count must be read only while holding the heap lock. VM |
|
336 |
// operations also hold the heap lock during collections. There is a lock |
|
337 |
// contention case where thread A blocks waiting on the Heap_lock, while |
|
338 |
// thread B is holding it doing a collection. When thread A gets the lock, |
|
339 |
// the collection count has already changed. To prevent duplicate collections, |
|
340 |
// The policy MUST attempt allocations during the same period it reads the |
|
341 |
// total_collections() value! |
|
342 |
{ |
|
343 |
MutexLocker ml(Heap_lock); |
|
344 |
gc_count = Universe::heap()->total_collections(); |
|
345 |
||
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|
346 |
result = young_gen()->allocate(size); |
1 | 347 |
if (result != NULL) { |
348 |
return result; |
|
349 |
} |
|
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|
350 |
|
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|
351 |
// If certain conditions hold, try allocating from the old gen. |
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|
352 |
result = mem_allocate_old_gen(size); |
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|
353 |
if (result != NULL) { |
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|
354 |
return result; |
1 | 355 |
} |
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|
356 |
|
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|
357 |
// Failed to allocate without a gc. |
1 | 358 |
if (GC_locker::is_active_and_needs_gc()) { |
359 |
// If this thread is not in a jni critical section, we stall |
|
360 |
// the requestor until the critical section has cleared and |
|
361 |
// GC allowed. When the critical section clears, a GC is |
|
362 |
// initiated by the last thread exiting the critical section; so |
|
363 |
// we retry the allocation sequence from the beginning of the loop, |
|
364 |
// rather than causing more, now probably unnecessary, GC attempts. |
|
365 |
JavaThread* jthr = JavaThread::current(); |
|
366 |
if (!jthr->in_critical()) { |
|
367 |
MutexUnlocker mul(Heap_lock); |
|
368 |
GC_locker::stall_until_clear(); |
|
369 |
continue; |
|
370 |
} else { |
|
371 |
if (CheckJNICalls) { |
|
372 |
fatal("Possible deadlock due to allocating while" |
|
373 |
" in jni critical section"); |
|
374 |
} |
|
375 |
return NULL; |
|
376 |
} |
|
377 |
} |
|
378 |
} |
|
379 |
||
380 |
if (result == NULL) { |
|
381 |
// Generate a VM operation |
|
9997
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|
382 |
VM_ParallelGCFailedAllocation op(size, gc_count); |
1 | 383 |
VMThread::execute(&op); |
384 |
||
385 |
// Did the VM operation execute? If so, return the result directly. |
|
386 |
// This prevents us from looping until time out on requests that can |
|
387 |
// not be satisfied. |
|
388 |
if (op.prologue_succeeded()) { |
|
389 |
assert(Universe::heap()->is_in_or_null(op.result()), |
|
390 |
"result not in heap"); |
|
391 |
||
392 |
// If GC was locked out during VM operation then retry allocation |
|
393 |
// and/or stall as necessary. |
|
394 |
if (op.gc_locked()) { |
|
395 |
assert(op.result() == NULL, "must be NULL if gc_locked() is true"); |
|
396 |
continue; // retry and/or stall as necessary |
|
397 |
} |
|
5343
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diff
changeset
|
398 |
|
95a5c4b89273
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diff
changeset
|
399 |
// Exit the loop if the gc time limit has been exceeded. |
95a5c4b89273
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diff
changeset
|
400 |
// The allocation must have failed above ("result" guarding |
95a5c4b89273
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jmasa
parents:
4637
diff
changeset
|
401 |
// this path is NULL) and the most recent collection has exceeded the |
95a5c4b89273
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4637
diff
changeset
|
402 |
// gc overhead limit (although enough may have been collected to |
95a5c4b89273
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parents:
4637
diff
changeset
|
403 |
// satisfy the allocation). Exit the loop so that an out-of-memory |
95a5c4b89273
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4637
diff
changeset
|
404 |
// will be thrown (return a NULL ignoring the contents of |
95a5c4b89273
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diff
changeset
|
405 |
// op.result()), |
95a5c4b89273
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diff
changeset
|
406 |
// but clear gc_overhead_limit_exceeded so that the next collection |
95a5c4b89273
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
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parents:
4637
diff
changeset
|
407 |
// starts with a clean slate (i.e., forgets about previous overhead |
95a5c4b89273
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jmasa
parents:
4637
diff
changeset
|
408 |
// excesses). Fill op.result() with a filler object so that the |
95a5c4b89273
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
jmasa
parents:
4637
diff
changeset
|
409 |
// heap remains parsable. |
95a5c4b89273
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parents:
4637
diff
changeset
|
410 |
const bool limit_exceeded = size_policy()->gc_overhead_limit_exceeded(); |
95a5c4b89273
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jmasa
parents:
4637
diff
changeset
|
411 |
const bool softrefs_clear = collector_policy()->all_soft_refs_clear(); |
15959
9a29e0e3a633
6976528: PS: assert(!limit_exceeded || softrefs_clear) failed: Should have been cleared
jmasa
parents:
13728
diff
changeset
|
412 |
|
5343
95a5c4b89273
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jmasa
parents:
4637
diff
changeset
|
413 |
if (limit_exceeded && softrefs_clear) { |
95a5c4b89273
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jmasa
parents:
4637
diff
changeset
|
414 |
*gc_overhead_limit_was_exceeded = true; |
95a5c4b89273
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
jmasa
parents:
4637
diff
changeset
|
415 |
size_policy()->set_gc_overhead_limit_exceeded(false); |
95a5c4b89273
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
jmasa
parents:
4637
diff
changeset
|
416 |
if (PrintGCDetails && Verbose) { |
95a5c4b89273
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
jmasa
parents:
4637
diff
changeset
|
417 |
gclog_or_tty->print_cr("ParallelScavengeHeap::mem_allocate: " |
95a5c4b89273
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
jmasa
parents:
4637
diff
changeset
|
418 |
"return NULL because gc_overhead_limit_exceeded is set"); |
95a5c4b89273
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
jmasa
parents:
4637
diff
changeset
|
419 |
} |
95a5c4b89273
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
jmasa
parents:
4637
diff
changeset
|
420 |
if (op.result() != NULL) { |
95a5c4b89273
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
jmasa
parents:
4637
diff
changeset
|
421 |
CollectedHeap::fill_with_object(op.result(), size); |
95a5c4b89273
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
jmasa
parents:
4637
diff
changeset
|
422 |
} |
95a5c4b89273
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
jmasa
parents:
4637
diff
changeset
|
423 |
return NULL; |
1 | 424 |
} |
5343
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jmasa
parents:
4637
diff
changeset
|
425 |
|
1 | 426 |
return op.result(); |
427 |
} |
|
428 |
} |
|
429 |
||
430 |
// The policy object will prevent us from looping forever. If the |
|
431 |
// time spent in gc crosses a threshold, we will bail out. |
|
432 |
loop_count++; |
|
433 |
if ((result == NULL) && (QueuedAllocationWarningCount > 0) && |
|
434 |
(loop_count % QueuedAllocationWarningCount == 0)) { |
|
435 |
warning("ParallelScavengeHeap::mem_allocate retries %d times \n\t" |
|
9997
b75b7939f448
6994322: Remove the is_tlab and is_noref / is_large_noref parameters from the CollectedHeap
tonyp
parents:
9995
diff
changeset
|
436 |
" size=%d", loop_count, size); |
1 | 437 |
} |
438 |
} |
|
439 |
||
440 |
return result; |
|
441 |
} |
|
442 |
||
11758
b1a0089f89d2
6330863: vm/gc/InfiniteList.java fails intermittently due to timeout
jcoomes
parents:
10997
diff
changeset
|
443 |
// A "death march" is a series of ultra-slow allocations in which a full gc is |
b1a0089f89d2
6330863: vm/gc/InfiniteList.java fails intermittently due to timeout
jcoomes
parents:
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diff
changeset
|
444 |
// done before each allocation, and after the full gc the allocation still |
b1a0089f89d2
6330863: vm/gc/InfiniteList.java fails intermittently due to timeout
jcoomes
parents:
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diff
changeset
|
445 |
// cannot be satisfied from the young gen. This routine detects that condition; |
b1a0089f89d2
6330863: vm/gc/InfiniteList.java fails intermittently due to timeout
jcoomes
parents:
10997
diff
changeset
|
446 |
// it should be called after a full gc has been done and the allocation |
b1a0089f89d2
6330863: vm/gc/InfiniteList.java fails intermittently due to timeout
jcoomes
parents:
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diff
changeset
|
447 |
// attempted from the young gen. The parameter 'addr' should be the result of |
b1a0089f89d2
6330863: vm/gc/InfiniteList.java fails intermittently due to timeout
jcoomes
parents:
10997
diff
changeset
|
448 |
// that young gen allocation attempt. |
b1a0089f89d2
6330863: vm/gc/InfiniteList.java fails intermittently due to timeout
jcoomes
parents:
10997
diff
changeset
|
449 |
void |
b1a0089f89d2
6330863: vm/gc/InfiniteList.java fails intermittently due to timeout
jcoomes
parents:
10997
diff
changeset
|
450 |
ParallelScavengeHeap::death_march_check(HeapWord* const addr, size_t size) { |
b1a0089f89d2
6330863: vm/gc/InfiniteList.java fails intermittently due to timeout
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diff
changeset
|
451 |
if (addr != NULL) { |
b1a0089f89d2
6330863: vm/gc/InfiniteList.java fails intermittently due to timeout
jcoomes
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diff
changeset
|
452 |
_death_march_count = 0; // death march has ended |
b1a0089f89d2
6330863: vm/gc/InfiniteList.java fails intermittently due to timeout
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diff
changeset
|
453 |
} else if (_death_march_count == 0) { |
b1a0089f89d2
6330863: vm/gc/InfiniteList.java fails intermittently due to timeout
jcoomes
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10997
diff
changeset
|
454 |
if (should_alloc_in_eden(size)) { |
b1a0089f89d2
6330863: vm/gc/InfiniteList.java fails intermittently due to timeout
jcoomes
parents:
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diff
changeset
|
455 |
_death_march_count = 1; // death march has started |
b1a0089f89d2
6330863: vm/gc/InfiniteList.java fails intermittently due to timeout
jcoomes
parents:
10997
diff
changeset
|
456 |
} |
b1a0089f89d2
6330863: vm/gc/InfiniteList.java fails intermittently due to timeout
jcoomes
parents:
10997
diff
changeset
|
457 |
} |
b1a0089f89d2
6330863: vm/gc/InfiniteList.java fails intermittently due to timeout
jcoomes
parents:
10997
diff
changeset
|
458 |
} |
b1a0089f89d2
6330863: vm/gc/InfiniteList.java fails intermittently due to timeout
jcoomes
parents:
10997
diff
changeset
|
459 |
|
b1a0089f89d2
6330863: vm/gc/InfiniteList.java fails intermittently due to timeout
jcoomes
parents:
10997
diff
changeset
|
460 |
HeapWord* ParallelScavengeHeap::mem_allocate_old_gen(size_t size) { |
b1a0089f89d2
6330863: vm/gc/InfiniteList.java fails intermittently due to timeout
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diff
changeset
|
461 |
if (!should_alloc_in_eden(size) || GC_locker::is_active_and_needs_gc()) { |
b1a0089f89d2
6330863: vm/gc/InfiniteList.java fails intermittently due to timeout
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diff
changeset
|
462 |
// Size is too big for eden, or gc is locked out. |
b1a0089f89d2
6330863: vm/gc/InfiniteList.java fails intermittently due to timeout
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diff
changeset
|
463 |
return old_gen()->allocate(size); |
b1a0089f89d2
6330863: vm/gc/InfiniteList.java fails intermittently due to timeout
jcoomes
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10997
diff
changeset
|
464 |
} |
b1a0089f89d2
6330863: vm/gc/InfiniteList.java fails intermittently due to timeout
jcoomes
parents:
10997
diff
changeset
|
465 |
|
b1a0089f89d2
6330863: vm/gc/InfiniteList.java fails intermittently due to timeout
jcoomes
parents:
10997
diff
changeset
|
466 |
// If a "death march" is in progress, allocate from the old gen a limited |
b1a0089f89d2
6330863: vm/gc/InfiniteList.java fails intermittently due to timeout
jcoomes
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changeset
|
467 |
// number of times before doing a GC. |
b1a0089f89d2
6330863: vm/gc/InfiniteList.java fails intermittently due to timeout
jcoomes
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diff
changeset
|
468 |
if (_death_march_count > 0) { |
b1a0089f89d2
6330863: vm/gc/InfiniteList.java fails intermittently due to timeout
jcoomes
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diff
changeset
|
469 |
if (_death_march_count < 64) { |
b1a0089f89d2
6330863: vm/gc/InfiniteList.java fails intermittently due to timeout
jcoomes
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diff
changeset
|
470 |
++_death_march_count; |
b1a0089f89d2
6330863: vm/gc/InfiniteList.java fails intermittently due to timeout
jcoomes
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diff
changeset
|
471 |
return old_gen()->allocate(size); |
b1a0089f89d2
6330863: vm/gc/InfiniteList.java fails intermittently due to timeout
jcoomes
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diff
changeset
|
472 |
} else { |
b1a0089f89d2
6330863: vm/gc/InfiniteList.java fails intermittently due to timeout
jcoomes
parents:
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diff
changeset
|
473 |
_death_march_count = 0; |
b1a0089f89d2
6330863: vm/gc/InfiniteList.java fails intermittently due to timeout
jcoomes
parents:
10997
diff
changeset
|
474 |
} |
b1a0089f89d2
6330863: vm/gc/InfiniteList.java fails intermittently due to timeout
jcoomes
parents:
10997
diff
changeset
|
475 |
} |
b1a0089f89d2
6330863: vm/gc/InfiniteList.java fails intermittently due to timeout
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diff
changeset
|
476 |
return NULL; |
b1a0089f89d2
6330863: vm/gc/InfiniteList.java fails intermittently due to timeout
jcoomes
parents:
10997
diff
changeset
|
477 |
} |
b1a0089f89d2
6330863: vm/gc/InfiniteList.java fails intermittently due to timeout
jcoomes
parents:
10997
diff
changeset
|
478 |
|
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13195
diff
changeset
|
479 |
void ParallelScavengeHeap::do_full_collection(bool clear_all_soft_refs) { |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13195
diff
changeset
|
480 |
if (UseParallelOldGC) { |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13195
diff
changeset
|
481 |
// The do_full_collection() parameter clear_all_soft_refs |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13195
diff
changeset
|
482 |
// is interpreted here as maximum_compaction which will |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13195
diff
changeset
|
483 |
// cause SoftRefs to be cleared. |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
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diff
changeset
|
484 |
bool maximum_compaction = clear_all_soft_refs; |
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diff
changeset
|
485 |
PSParallelCompact::invoke(maximum_compaction); |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
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diff
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|
486 |
} else { |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
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diff
changeset
|
487 |
PSMarkSweep::invoke(clear_all_soft_refs); |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13195
diff
changeset
|
488 |
} |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
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diff
changeset
|
489 |
} |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
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changeset
|
490 |
|
1 | 491 |
// Failed allocation policy. Must be called from the VM thread, and |
492 |
// only at a safepoint! Note that this method has policy for allocation |
|
493 |
// flow, and NOT collection policy. So we do not check for gc collection |
|
494 |
// time over limit here, that is the responsibility of the heap specific |
|
495 |
// collection methods. This method decides where to attempt allocations, |
|
496 |
// and when to attempt collections, but no collection specific policy. |
|
9997
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6994322: Remove the is_tlab and is_noref / is_large_noref parameters from the CollectedHeap
tonyp
parents:
9995
diff
changeset
|
497 |
HeapWord* ParallelScavengeHeap::failed_mem_allocate(size_t size) { |
1 | 498 |
assert(SafepointSynchronize::is_at_safepoint(), "should be at safepoint"); |
499 |
assert(Thread::current() == (Thread*)VMThread::vm_thread(), "should be in vm thread"); |
|
500 |
assert(!Universe::heap()->is_gc_active(), "not reentrant"); |
|
501 |
assert(!Heap_lock->owned_by_self(), "this thread should not own the Heap_lock"); |
|
502 |
||
11758
b1a0089f89d2
6330863: vm/gc/InfiniteList.java fails intermittently due to timeout
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parents:
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diff
changeset
|
503 |
// We assume that allocation in eden will fail unless we collect. |
1 | 504 |
|
505 |
// First level allocation failure, scavenge and allocate in young gen. |
|
506 |
GCCauseSetter gccs(this, GCCause::_allocation_failure); |
|
11758
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6330863: vm/gc/InfiniteList.java fails intermittently due to timeout
jcoomes
parents:
10997
diff
changeset
|
507 |
const bool invoked_full_gc = PSScavenge::invoke(); |
9997
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6994322: Remove the is_tlab and is_noref / is_large_noref parameters from the CollectedHeap
tonyp
parents:
9995
diff
changeset
|
508 |
HeapWord* result = young_gen()->allocate(size); |
1 | 509 |
|
510 |
// Second level allocation failure. |
|
511 |
// Mark sweep and allocate in young generation. |
|
11758
b1a0089f89d2
6330863: vm/gc/InfiniteList.java fails intermittently due to timeout
jcoomes
parents:
10997
diff
changeset
|
512 |
if (result == NULL && !invoked_full_gc) { |
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13195
diff
changeset
|
513 |
do_full_collection(false); |
11758
b1a0089f89d2
6330863: vm/gc/InfiniteList.java fails intermittently due to timeout
jcoomes
parents:
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diff
changeset
|
514 |
result = young_gen()->allocate(size); |
1 | 515 |
} |
516 |
||
11758
b1a0089f89d2
6330863: vm/gc/InfiniteList.java fails intermittently due to timeout
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parents:
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diff
changeset
|
517 |
death_march_check(result, size); |
b1a0089f89d2
6330863: vm/gc/InfiniteList.java fails intermittently due to timeout
jcoomes
parents:
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diff
changeset
|
518 |
|
1 | 519 |
// Third level allocation failure. |
520 |
// After mark sweep and young generation allocation failure, |
|
521 |
// allocate in old generation. |
|
9997
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6994322: Remove the is_tlab and is_noref / is_large_noref parameters from the CollectedHeap
tonyp
parents:
9995
diff
changeset
|
522 |
if (result == NULL) { |
b75b7939f448
6994322: Remove the is_tlab and is_noref / is_large_noref parameters from the CollectedHeap
tonyp
parents:
9995
diff
changeset
|
523 |
result = old_gen()->allocate(size); |
1 | 524 |
} |
525 |
||
526 |
// Fourth level allocation failure. We're running out of memory. |
|
527 |
// More complete mark sweep and allocate in young generation. |
|
528 |
if (result == NULL) { |
|
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13195
diff
changeset
|
529 |
do_full_collection(true); |
9997
b75b7939f448
6994322: Remove the is_tlab and is_noref / is_large_noref parameters from the CollectedHeap
tonyp
parents:
9995
diff
changeset
|
530 |
result = young_gen()->allocate(size); |
1 | 531 |
} |
532 |
||
533 |
// Fifth level allocation failure. |
|
534 |
// After more complete mark sweep, allocate in old generation. |
|
9997
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6994322: Remove the is_tlab and is_noref / is_large_noref parameters from the CollectedHeap
tonyp
parents:
9995
diff
changeset
|
535 |
if (result == NULL) { |
b75b7939f448
6994322: Remove the is_tlab and is_noref / is_large_noref parameters from the CollectedHeap
tonyp
parents:
9995
diff
changeset
|
536 |
result = old_gen()->allocate(size); |
1 | 537 |
} |
538 |
||
539 |
return result; |
|
540 |
} |
|
541 |
||
542 |
void ParallelScavengeHeap::ensure_parsability(bool retire_tlabs) { |
|
543 |
CollectedHeap::ensure_parsability(retire_tlabs); |
|
544 |
young_gen()->eden_space()->ensure_parsability(); |
|
545 |
} |
|
546 |
||
547 |
size_t ParallelScavengeHeap::unsafe_max_alloc() { |
|
548 |
return young_gen()->eden_space()->free_in_bytes(); |
|
549 |
} |
|
550 |
||
551 |
size_t ParallelScavengeHeap::tlab_capacity(Thread* thr) const { |
|
552 |
return young_gen()->eden_space()->tlab_capacity(thr); |
|
553 |
} |
|
554 |
||
555 |
size_t ParallelScavengeHeap::unsafe_max_tlab_alloc(Thread* thr) const { |
|
556 |
return young_gen()->eden_space()->unsafe_max_tlab_alloc(thr); |
|
557 |
} |
|
558 |
||
559 |
HeapWord* ParallelScavengeHeap::allocate_new_tlab(size_t size) { |
|
9997
b75b7939f448
6994322: Remove the is_tlab and is_noref / is_large_noref parameters from the CollectedHeap
tonyp
parents:
9995
diff
changeset
|
560 |
return young_gen()->allocate(size); |
1 | 561 |
} |
562 |
||
563 |
void ParallelScavengeHeap::accumulate_statistics_all_tlabs() { |
|
564 |
CollectedHeap::accumulate_statistics_all_tlabs(); |
|
565 |
} |
|
566 |
||
567 |
void ParallelScavengeHeap::resize_all_tlabs() { |
|
568 |
CollectedHeap::resize_all_tlabs(); |
|
569 |
} |
|
570 |
||
4030
4c471254865e
6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
ysr
parents:
3908
diff
changeset
|
571 |
bool ParallelScavengeHeap::can_elide_initializing_store_barrier(oop new_obj) { |
4c471254865e
6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
ysr
parents:
3908
diff
changeset
|
572 |
// We don't need barriers for stores to objects in the |
4c471254865e
6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
ysr
parents:
3908
diff
changeset
|
573 |
// young gen and, a fortiori, for initializing stores to |
4c471254865e
6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
ysr
parents:
3908
diff
changeset
|
574 |
// objects therein. |
4c471254865e
6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
ysr
parents:
3908
diff
changeset
|
575 |
return is_in_young(new_obj); |
4c471254865e
6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
ysr
parents:
3908
diff
changeset
|
576 |
} |
4c471254865e
6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
ysr
parents:
3908
diff
changeset
|
577 |
|
1 | 578 |
// This method is used by System.gc() and JVMTI. |
579 |
void ParallelScavengeHeap::collect(GCCause::Cause cause) { |
|
580 |
assert(!Heap_lock->owned_by_self(), |
|
581 |
"this thread should not own the Heap_lock"); |
|
582 |
||
583 |
unsigned int gc_count = 0; |
|
584 |
unsigned int full_gc_count = 0; |
|
585 |
{ |
|
586 |
MutexLocker ml(Heap_lock); |
|
587 |
// This value is guarded by the Heap_lock |
|
588 |
gc_count = Universe::heap()->total_collections(); |
|
589 |
full_gc_count = Universe::heap()->total_full_collections(); |
|
590 |
} |
|
591 |
||
592 |
VM_ParallelGCSystemGC op(gc_count, full_gc_count, cause); |
|
593 |
VMThread::execute(&op); |
|
594 |
} |
|
595 |
||
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13195
diff
changeset
|
596 |
void ParallelScavengeHeap::oop_iterate(ExtendedOopClosure* cl) { |
1 | 597 |
Unimplemented(); |
598 |
} |
|
599 |
||
600 |
void ParallelScavengeHeap::object_iterate(ObjectClosure* cl) { |
|
601 |
young_gen()->object_iterate(cl); |
|
602 |
old_gen()->object_iterate(cl); |
|
603 |
} |
|
604 |
||
605 |
||
606 |
HeapWord* ParallelScavengeHeap::block_start(const void* addr) const { |
|
607 |
if (young_gen()->is_in_reserved(addr)) { |
|
608 |
assert(young_gen()->is_in(addr), |
|
609 |
"addr should be in allocated part of young gen"); |
|
7108 | 610 |
// called from os::print_location by find or VMError |
611 |
if (Debugging || VMError::fatal_error_in_progress()) return NULL; |
|
1 | 612 |
Unimplemented(); |
613 |
} else if (old_gen()->is_in_reserved(addr)) { |
|
614 |
assert(old_gen()->is_in(addr), |
|
615 |
"addr should be in allocated part of old gen"); |
|
616 |
return old_gen()->start_array()->object_start((HeapWord*)addr); |
|
617 |
} |
|
618 |
return 0; |
|
619 |
} |
|
620 |
||
621 |
size_t ParallelScavengeHeap::block_size(const HeapWord* addr) const { |
|
622 |
return oop(addr)->size(); |
|
623 |
} |
|
624 |
||
625 |
bool ParallelScavengeHeap::block_is_obj(const HeapWord* addr) const { |
|
626 |
return block_start(addr) == addr; |
|
627 |
} |
|
628 |
||
629 |
jlong ParallelScavengeHeap::millis_since_last_gc() { |
|
630 |
return UseParallelOldGC ? |
|
631 |
PSParallelCompact::millis_since_last_gc() : |
|
632 |
PSMarkSweep::millis_since_last_gc(); |
|
633 |
} |
|
634 |
||
635 |
void ParallelScavengeHeap::prepare_for_verify() { |
|
636 |
ensure_parsability(false); // no need to retire TLABs for verification |
|
637 |
} |
|
638 |
||
639 |
void ParallelScavengeHeap::print_on(outputStream* st) const { |
|
640 |
young_gen()->print_on(st); |
|
641 |
old_gen()->print_on(st); |
|
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13195
diff
changeset
|
642 |
MetaspaceAux::print_on(st); |
1 | 643 |
} |
644 |
||
645 |
void ParallelScavengeHeap::gc_threads_do(ThreadClosure* tc) const { |
|
646 |
PSScavenge::gc_task_manager()->threads_do(tc); |
|
647 |
} |
|
648 |
||
649 |
void ParallelScavengeHeap::print_gc_threads_on(outputStream* st) const { |
|
650 |
PSScavenge::gc_task_manager()->print_threads_on(st); |
|
651 |
} |
|
652 |
||
653 |
void ParallelScavengeHeap::print_tracing_info() const { |
|
654 |
if (TraceGen0Time) { |
|
655 |
double time = PSScavenge::accumulated_time()->seconds(); |
|
656 |
tty->print_cr("[Accumulated GC generation 0 time %3.7f secs]", time); |
|
657 |
} |
|
658 |
if (TraceGen1Time) { |
|
659 |
double time = PSMarkSweep::accumulated_time()->seconds(); |
|
660 |
tty->print_cr("[Accumulated GC generation 1 time %3.7f secs]", time); |
|
661 |
} |
|
662 |
} |
|
663 |
||
664 |
||
12379 | 665 |
void ParallelScavengeHeap::verify(bool silent, VerifyOption option /* ignored */) { |
1 | 666 |
// Why do we need the total_collections()-filter below? |
667 |
if (total_collections() > 0) { |
|
668 |
if (!silent) { |
|
669 |
gclog_or_tty->print("tenured "); |
|
670 |
} |
|
12379 | 671 |
old_gen()->verify(); |
1 | 672 |
|
673 |
if (!silent) { |
|
674 |
gclog_or_tty->print("eden "); |
|
675 |
} |
|
12379 | 676 |
young_gen()->verify(); |
1 | 677 |
} |
678 |
} |
|
679 |
||
680 |
void ParallelScavengeHeap::print_heap_change(size_t prev_used) { |
|
681 |
if (PrintGCDetails && Verbose) { |
|
682 |
gclog_or_tty->print(" " SIZE_FORMAT |
|
683 |
"->" SIZE_FORMAT |
|
684 |
"(" SIZE_FORMAT ")", |
|
685 |
prev_used, used(), capacity()); |
|
686 |
} else { |
|
687 |
gclog_or_tty->print(" " SIZE_FORMAT "K" |
|
688 |
"->" SIZE_FORMAT "K" |
|
689 |
"(" SIZE_FORMAT "K)", |
|
690 |
prev_used / K, used() / K, capacity() / K); |
|
691 |
} |
|
692 |
} |
|
693 |
||
694 |
ParallelScavengeHeap* ParallelScavengeHeap::heap() { |
|
695 |
assert(_psh != NULL, "Uninitialized access to ParallelScavengeHeap::heap()"); |
|
696 |
assert(_psh->kind() == CollectedHeap::ParallelScavengeHeap, "not a parallel scavenge heap"); |
|
697 |
return _psh; |
|
698 |
} |
|
699 |
||
700 |
// Before delegating the resize to the young generation, |
|
701 |
// the reserved space for the young and old generations |
|
702 |
// may be changed to accomodate the desired resize. |
|
703 |
void ParallelScavengeHeap::resize_young_gen(size_t eden_size, |
|
704 |
size_t survivor_size) { |
|
705 |
if (UseAdaptiveGCBoundary) { |
|
706 |
if (size_policy()->bytes_absorbed_from_eden() != 0) { |
|
707 |
size_policy()->reset_bytes_absorbed_from_eden(); |
|
708 |
return; // The generation changed size already. |
|
709 |
} |
|
710 |
gens()->adjust_boundary_for_young_gen_needs(eden_size, survivor_size); |
|
711 |
} |
|
712 |
||
713 |
// Delegate the resize to the generation. |
|
714 |
_young_gen->resize(eden_size, survivor_size); |
|
715 |
} |
|
716 |
||
717 |
// Before delegating the resize to the old generation, |
|
718 |
// the reserved space for the young and old generations |
|
719 |
// may be changed to accomodate the desired resize. |
|
720 |
void ParallelScavengeHeap::resize_old_gen(size_t desired_free_space) { |
|
721 |
if (UseAdaptiveGCBoundary) { |
|
722 |
if (size_policy()->bytes_absorbed_from_eden() != 0) { |
|
723 |
size_policy()->reset_bytes_absorbed_from_eden(); |
|
724 |
return; // The generation changed size already. |
|
725 |
} |
|
726 |
gens()->adjust_boundary_for_old_gen_needs(desired_free_space); |
|
727 |
} |
|
728 |
||
729 |
// Delegate the resize to the generation. |
|
730 |
_old_gen->resize(desired_free_space); |
|
731 |
} |
|
971
f0b20be4165d
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
386
diff
changeset
|
732 |
|
3908
24b55ad4c228
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
3262
diff
changeset
|
733 |
ParallelScavengeHeap::ParStrongRootsScope::ParStrongRootsScope() { |
24b55ad4c228
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
3262
diff
changeset
|
734 |
// nothing particular |
24b55ad4c228
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
3262
diff
changeset
|
735 |
} |
24b55ad4c228
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
3262
diff
changeset
|
736 |
|
24b55ad4c228
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
3262
diff
changeset
|
737 |
ParallelScavengeHeap::ParStrongRootsScope::~ParStrongRootsScope() { |
24b55ad4c228
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
3262
diff
changeset
|
738 |
// nothing particular |
24b55ad4c228
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
3262
diff
changeset
|
739 |
} |
24b55ad4c228
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
3262
diff
changeset
|
740 |
|
971
f0b20be4165d
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
386
diff
changeset
|
741 |
#ifndef PRODUCT |
f0b20be4165d
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
386
diff
changeset
|
742 |
void ParallelScavengeHeap::record_gen_tops_before_GC() { |
f0b20be4165d
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
386
diff
changeset
|
743 |
if (ZapUnusedHeapArea) { |
f0b20be4165d
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
386
diff
changeset
|
744 |
young_gen()->record_spaces_top(); |
f0b20be4165d
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
386
diff
changeset
|
745 |
old_gen()->record_spaces_top(); |
f0b20be4165d
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
386
diff
changeset
|
746 |
} |
f0b20be4165d
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
386
diff
changeset
|
747 |
} |
f0b20be4165d
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
386
diff
changeset
|
748 |
|
f0b20be4165d
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
386
diff
changeset
|
749 |
void ParallelScavengeHeap::gen_mangle_unused_area() { |
f0b20be4165d
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
386
diff
changeset
|
750 |
if (ZapUnusedHeapArea) { |
f0b20be4165d
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
386
diff
changeset
|
751 |
young_gen()->eden_space()->mangle_unused_area(); |
f0b20be4165d
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
386
diff
changeset
|
752 |
young_gen()->to_space()->mangle_unused_area(); |
f0b20be4165d
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
386
diff
changeset
|
753 |
young_gen()->from_space()->mangle_unused_area(); |
f0b20be4165d
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
386
diff
changeset
|
754 |
old_gen()->object_space()->mangle_unused_area(); |
f0b20be4165d
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
386
diff
changeset
|
755 |
} |
f0b20be4165d
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
386
diff
changeset
|
756 |
} |
f0b20be4165d
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
386
diff
changeset
|
757 |
#endif |