author | stefank |
Mon, 25 Nov 2019 12:31:39 +0100 | |
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parent 59008 | 333c2b653434 |
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/* |
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* Copyright (c) 2005, 2019, 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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||
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#include "precompiled.hpp" |
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#include "aot/aotLoader.hpp" |
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#include "classfile/classLoaderDataGraph.hpp" |
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#include "classfile/javaClasses.inline.hpp" |
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#include "classfile/stringTable.hpp" |
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#include "classfile/symbolTable.hpp" |
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#include "classfile/systemDictionary.hpp" |
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#include "code/codeCache.hpp" |
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#include "gc/parallel/parallelArguments.hpp" |
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#include "gc/parallel/parallelScavengeHeap.inline.hpp" |
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#include "gc/parallel/parMarkBitMap.inline.hpp" |
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#include "gc/parallel/psAdaptiveSizePolicy.hpp" |
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#include "gc/parallel/psCompactionManager.inline.hpp" |
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#include "gc/parallel/psOldGen.hpp" |
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#include "gc/parallel/psParallelCompact.inline.hpp" |
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#include "gc/parallel/psPromotionManager.inline.hpp" |
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#include "gc/parallel/psRootType.hpp" |
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#include "gc/parallel/psScavenge.hpp" |
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#include "gc/parallel/psYoungGen.hpp" |
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#include "gc/shared/gcCause.hpp" |
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#include "gc/shared/gcHeapSummary.hpp" |
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#include "gc/shared/gcId.hpp" |
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#include "gc/shared/gcLocker.hpp" |
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#include "gc/shared/gcTimer.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/isGCActiveMark.hpp" |
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#include "gc/shared/referencePolicy.hpp" |
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#include "gc/shared/referenceProcessor.hpp" |
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#include "gc/shared/referenceProcessorPhaseTimes.hpp" |
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#include "gc/shared/spaceDecorator.inline.hpp" |
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#include "gc/shared/weakProcessor.hpp" |
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#include "gc/shared/workerPolicy.hpp" |
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#include "gc/shared/workgroup.hpp" |
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#include "logging/log.hpp" |
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#include "memory/iterator.inline.hpp" |
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#include "memory/resourceArea.hpp" |
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#include "memory/universe.hpp" |
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#include "oops/access.inline.hpp" |
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#include "oops/instanceClassLoaderKlass.inline.hpp" |
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#include "oops/instanceKlass.inline.hpp" |
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#include "oops/instanceMirrorKlass.inline.hpp" |
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#include "oops/methodData.hpp" |
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#include "oops/objArrayKlass.inline.hpp" |
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#include "oops/oop.inline.hpp" |
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#include "runtime/atomic.hpp" |
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#include "runtime/handles.inline.hpp" |
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#include "runtime/safepoint.hpp" |
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#include "runtime/vmThread.hpp" |
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#include "services/management.hpp" |
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#include "services/memTracker.hpp" |
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#include "services/memoryService.hpp" |
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#include "utilities/align.hpp" |
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#include "utilities/debug.hpp" |
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#include "utilities/events.hpp" |
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#include "utilities/formatBuffer.hpp" |
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#include "utilities/macros.hpp" |
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#include "utilities/stack.inline.hpp" |
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#if INCLUDE_JVMCI |
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#include "jvmci/jvmci.hpp" |
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#endif |
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#include <math.h> |
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// All sizes are in HeapWords. |
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const size_t ParallelCompactData::Log2RegionSize = 16; // 64K words |
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const size_t ParallelCompactData::RegionSize = (size_t)1 << Log2RegionSize; |
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const size_t ParallelCompactData::RegionSizeBytes = |
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RegionSize << LogHeapWordSize; |
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const size_t ParallelCompactData::RegionSizeOffsetMask = RegionSize - 1; |
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const size_t ParallelCompactData::RegionAddrOffsetMask = RegionSizeBytes - 1; |
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const size_t ParallelCompactData::RegionAddrMask = ~RegionAddrOffsetMask; |
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const size_t ParallelCompactData::Log2BlockSize = 7; // 128 words |
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const size_t ParallelCompactData::BlockSize = (size_t)1 << Log2BlockSize; |
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const size_t ParallelCompactData::BlockSizeBytes = |
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BlockSize << LogHeapWordSize; |
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const size_t ParallelCompactData::BlockSizeOffsetMask = BlockSize - 1; |
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const size_t ParallelCompactData::BlockAddrOffsetMask = BlockSizeBytes - 1; |
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const size_t ParallelCompactData::BlockAddrMask = ~BlockAddrOffsetMask; |
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const size_t ParallelCompactData::BlocksPerRegion = RegionSize / BlockSize; |
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const size_t ParallelCompactData::Log2BlocksPerRegion = |
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Log2RegionSize - Log2BlockSize; |
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const ParallelCompactData::RegionData::region_sz_t |
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ParallelCompactData::RegionData::dc_shift = 27; |
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const ParallelCompactData::RegionData::region_sz_t |
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ParallelCompactData::RegionData::dc_mask = ~0U << dc_shift; |
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const ParallelCompactData::RegionData::region_sz_t |
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ParallelCompactData::RegionData::dc_one = 0x1U << dc_shift; |
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const ParallelCompactData::RegionData::region_sz_t |
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ParallelCompactData::RegionData::los_mask = ~dc_mask; |
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const ParallelCompactData::RegionData::region_sz_t |
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ParallelCompactData::RegionData::dc_claimed = 0x8U << dc_shift; |
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const ParallelCompactData::RegionData::region_sz_t |
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ParallelCompactData::RegionData::dc_completed = 0xcU << dc_shift; |
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SpaceInfo PSParallelCompact::_space_info[PSParallelCompact::last_space_id]; |
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SpanSubjectToDiscoveryClosure PSParallelCompact::_span_based_discoverer; |
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ReferenceProcessor* PSParallelCompact::_ref_processor = NULL; |
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double PSParallelCompact::_dwl_mean; |
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double PSParallelCompact::_dwl_std_dev; |
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double PSParallelCompact::_dwl_first_term; |
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double PSParallelCompact::_dwl_adjustment; |
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#ifdef ASSERT |
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bool PSParallelCompact::_dwl_initialized = false; |
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#endif // #ifdef ASSERT |
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void SplitInfo::record(size_t src_region_idx, size_t partial_obj_size, |
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HeapWord* destination) |
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{ |
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assert(src_region_idx != 0, "invalid src_region_idx"); |
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assert(partial_obj_size != 0, "invalid partial_obj_size argument"); |
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assert(destination != NULL, "invalid destination argument"); |
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_src_region_idx = src_region_idx; |
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_partial_obj_size = partial_obj_size; |
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_destination = destination; |
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// These fields may not be updated below, so make sure they're clear. |
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assert(_dest_region_addr == NULL, "should have been cleared"); |
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assert(_first_src_addr == NULL, "should have been cleared"); |
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// Determine the number of destination regions for the partial object. |
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HeapWord* const last_word = destination + partial_obj_size - 1; |
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const ParallelCompactData& sd = PSParallelCompact::summary_data(); |
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HeapWord* const beg_region_addr = sd.region_align_down(destination); |
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HeapWord* const end_region_addr = sd.region_align_down(last_word); |
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if (beg_region_addr == end_region_addr) { |
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// One destination region. |
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_destination_count = 1; |
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if (end_region_addr == destination) { |
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// The destination falls on a region boundary, thus the first word of the |
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// partial object will be the first word copied to the destination region. |
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_dest_region_addr = end_region_addr; |
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_first_src_addr = sd.region_to_addr(src_region_idx); |
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} |
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} else { |
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// Two destination regions. When copied, the partial object will cross a |
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// destination region boundary, so a word somewhere within the partial |
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// object will be the first word copied to the second destination region. |
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_destination_count = 2; |
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_dest_region_addr = end_region_addr; |
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const size_t ofs = pointer_delta(end_region_addr, destination); |
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assert(ofs < _partial_obj_size, "sanity"); |
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_first_src_addr = sd.region_to_addr(src_region_idx) + ofs; |
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} |
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181 |
} |
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182 |
|
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183 |
void SplitInfo::clear() |
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184 |
{ |
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185 |
_src_region_idx = 0; |
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_partial_obj_size = 0; |
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_destination = NULL; |
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_destination_count = 0; |
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_dest_region_addr = NULL; |
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_first_src_addr = NULL; |
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191 |
assert(!is_valid(), "sanity"); |
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192 |
} |
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193 |
|
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194 |
#ifdef ASSERT |
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195 |
void SplitInfo::verify_clear() |
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196 |
{ |
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197 |
assert(_src_region_idx == 0, "not clear"); |
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198 |
assert(_partial_obj_size == 0, "not clear"); |
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assert(_destination == NULL, "not clear"); |
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assert(_destination_count == 0, "not clear"); |
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201 |
assert(_dest_region_addr == NULL, "not clear"); |
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assert(_first_src_addr == NULL, "not clear"); |
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203 |
} |
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#endif // #ifdef ASSERT |
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205 |
|
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206 |
|
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void PSParallelCompact::print_on_error(outputStream* st) { |
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_mark_bitmap.print_on_error(st); |
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209 |
} |
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210 |
|
1 | 211 |
#ifndef PRODUCT |
212 |
const char* PSParallelCompact::space_names[] = { |
|
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213 |
"old ", "eden", "from", "to " |
1 | 214 |
}; |
215 |
||
35061 | 216 |
void PSParallelCompact::print_region_ranges() { |
37146 | 217 |
if (!log_develop_is_enabled(Trace, gc, compaction)) { |
35061 | 218 |
return; |
219 |
} |
|
37242 | 220 |
Log(gc, compaction) log; |
35061 | 221 |
ResourceMark rm; |
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LogStream ls(log.trace()); |
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223 |
Universe::print_on(&ls); |
35061 | 224 |
log.trace("space bottom top end new_top"); |
225 |
log.trace("------ ---------- ---------- ---------- ----------"); |
|
1 | 226 |
|
227 |
for (unsigned int id = 0; id < last_space_id; ++id) { |
|
228 |
const MutableSpace* space = _space_info[id].space(); |
|
35061 | 229 |
log.trace("%u %s " |
230 |
SIZE_FORMAT_W(10) " " SIZE_FORMAT_W(10) " " |
|
231 |
SIZE_FORMAT_W(10) " " SIZE_FORMAT_W(10) " ", |
|
232 |
id, space_names[id], |
|
233 |
summary_data().addr_to_region_idx(space->bottom()), |
|
234 |
summary_data().addr_to_region_idx(space->top()), |
|
235 |
summary_data().addr_to_region_idx(space->end()), |
|
236 |
summary_data().addr_to_region_idx(_space_info[id].new_top())); |
|
1 | 237 |
} |
238 |
} |
|
239 |
||
240 |
void |
|
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241 |
print_generic_summary_region(size_t i, const ParallelCompactData::RegionData* c) |
1 | 242 |
{ |
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243 |
#define REGION_IDX_FORMAT SIZE_FORMAT_W(7) |
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244 |
#define REGION_DATA_FORMAT SIZE_FORMAT_W(5) |
1 | 245 |
|
246 |
ParallelCompactData& sd = PSParallelCompact::summary_data(); |
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247 |
size_t dci = c->destination() ? sd.addr_to_region_idx(c->destination()) : 0; |
37146 | 248 |
log_develop_trace(gc, compaction)( |
35061 | 249 |
REGION_IDX_FORMAT " " PTR_FORMAT " " |
250 |
REGION_IDX_FORMAT " " PTR_FORMAT " " |
|
251 |
REGION_DATA_FORMAT " " REGION_DATA_FORMAT " " |
|
252 |
REGION_DATA_FORMAT " " REGION_IDX_FORMAT " %d", |
|
253 |
i, p2i(c->data_location()), dci, p2i(c->destination()), |
|
254 |
c->partial_obj_size(), c->live_obj_size(), |
|
255 |
c->data_size(), c->source_region(), c->destination_count()); |
|
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256 |
|
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257 |
#undef REGION_IDX_FORMAT |
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258 |
#undef REGION_DATA_FORMAT |
1 | 259 |
} |
260 |
||
261 |
void |
|
262 |
print_generic_summary_data(ParallelCompactData& summary_data, |
|
263 |
HeapWord* const beg_addr, |
|
264 |
HeapWord* const end_addr) |
|
265 |
{ |
|
266 |
size_t total_words = 0; |
|
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size_t i = summary_data.addr_to_region_idx(beg_addr); |
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268 |
const size_t last = summary_data.addr_to_region_idx(end_addr); |
1 | 269 |
HeapWord* pdest = 0; |
270 |
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while (i < last) { |
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272 |
ParallelCompactData::RegionData* c = summary_data.region(i); |
1 | 273 |
if (c->data_size() != 0 || c->destination() != pdest) { |
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274 |
print_generic_summary_region(i, c); |
1 | 275 |
total_words += c->data_size(); |
276 |
pdest = c->destination(); |
|
277 |
} |
|
278 |
++i; |
|
279 |
} |
|
280 |
||
37146 | 281 |
log_develop_trace(gc, compaction)("summary_data_bytes=" SIZE_FORMAT, total_words * HeapWordSize); |
1 | 282 |
} |
283 |
||
284 |
void |
|
42638 | 285 |
PSParallelCompact::print_generic_summary_data(ParallelCompactData& summary_data, |
286 |
HeapWord* const beg_addr, |
|
287 |
HeapWord* const end_addr) { |
|
288 |
::print_generic_summary_data(summary_data,beg_addr, end_addr); |
|
289 |
} |
|
290 |
||
291 |
void |
|
1 | 292 |
print_generic_summary_data(ParallelCompactData& summary_data, |
293 |
SpaceInfo* space_info) |
|
294 |
{ |
|
37146 | 295 |
if (!log_develop_is_enabled(Trace, gc, compaction)) { |
35061 | 296 |
return; |
297 |
} |
|
298 |
||
1 | 299 |
for (unsigned int id = 0; id < PSParallelCompact::last_space_id; ++id) { |
300 |
const MutableSpace* space = space_info[id].space(); |
|
301 |
print_generic_summary_data(summary_data, space->bottom(), |
|
302 |
MAX2(space->top(), space_info[id].new_top())); |
|
303 |
} |
|
304 |
} |
|
305 |
||
306 |
void |
|
307 |
print_initial_summary_data(ParallelCompactData& summary_data, |
|
308 |
const MutableSpace* space) { |
|
309 |
if (space->top() == space->bottom()) { |
|
310 |
return; |
|
311 |
} |
|
312 |
||
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313 |
const size_t region_size = ParallelCompactData::RegionSize; |
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314 |
typedef ParallelCompactData::RegionData RegionData; |
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315 |
HeapWord* const top_aligned_up = summary_data.region_align_up(space->top()); |
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316 |
const size_t end_region = summary_data.addr_to_region_idx(top_aligned_up); |
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317 |
const RegionData* c = summary_data.region(end_region - 1); |
1 | 318 |
HeapWord* end_addr = c->destination() + c->data_size(); |
319 |
const size_t live_in_space = pointer_delta(end_addr, space->bottom()); |
|
320 |
||
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|
321 |
// Print (and count) the full regions at the beginning of the space. |
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|
322 |
size_t full_region_count = 0; |
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|
323 |
size_t i = summary_data.addr_to_region_idx(space->bottom()); |
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|
324 |
while (i < end_region && summary_data.region(i)->data_size() == region_size) { |
35061 | 325 |
ParallelCompactData::RegionData* c = summary_data.region(i); |
37146 | 326 |
log_develop_trace(gc, compaction)( |
35061 | 327 |
SIZE_FORMAT_W(5) " " PTR_FORMAT " " SIZE_FORMAT_W(5) " " SIZE_FORMAT_W(5) " " SIZE_FORMAT_W(5) " " SIZE_FORMAT_W(5) " %d", |
328 |
i, p2i(c->destination()), |
|
329 |
c->partial_obj_size(), c->live_obj_size(), |
|
330 |
c->data_size(), c->source_region(), c->destination_count()); |
|
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|
331 |
++full_region_count; |
1 | 332 |
++i; |
333 |
} |
|
334 |
||
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|
335 |
size_t live_to_right = live_in_space - full_region_count * region_size; |
1 | 336 |
|
337 |
double max_reclaimed_ratio = 0.0; |
|
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|
338 |
size_t max_reclaimed_ratio_region = 0; |
1 | 339 |
size_t max_dead_to_right = 0; |
340 |
size_t max_live_to_right = 0; |
|
341 |
||
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|
342 |
// Print the 'reclaimed ratio' for regions while there is something live in |
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|
343 |
// the region or to the right of it. The remaining regions are empty (and |
1 | 344 |
// uninteresting), and computing the ratio will result in division by 0. |
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|
345 |
while (i < end_region && live_to_right > 0) { |
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|
346 |
c = summary_data.region(i); |
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|
347 |
HeapWord* const region_addr = summary_data.region_to_addr(i); |
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|
348 |
const size_t used_to_right = pointer_delta(space->top(), region_addr); |
1 | 349 |
const size_t dead_to_right = used_to_right - live_to_right; |
350 |
const double reclaimed_ratio = double(dead_to_right) / live_to_right; |
|
351 |
||
352 |
if (reclaimed_ratio > max_reclaimed_ratio) { |
|
353 |
max_reclaimed_ratio = reclaimed_ratio; |
|
1407
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|
354 |
max_reclaimed_ratio_region = i; |
1 | 355 |
max_dead_to_right = dead_to_right; |
356 |
max_live_to_right = live_to_right; |
|
357 |
} |
|
358 |
||
35061 | 359 |
ParallelCompactData::RegionData* c = summary_data.region(i); |
37146 | 360 |
log_develop_trace(gc, compaction)( |
35061 | 361 |
SIZE_FORMAT_W(5) " " PTR_FORMAT " " SIZE_FORMAT_W(5) " " SIZE_FORMAT_W(5) " " SIZE_FORMAT_W(5) " " SIZE_FORMAT_W(5) " %d" |
362 |
"%12.10f " SIZE_FORMAT_W(10) " " SIZE_FORMAT_W(10), |
|
363 |
i, p2i(c->destination()), |
|
364 |
c->partial_obj_size(), c->live_obj_size(), |
|
365 |
c->data_size(), c->source_region(), c->destination_count(), |
|
366 |
reclaimed_ratio, dead_to_right, live_to_right); |
|
367 |
||
1 | 368 |
|
369 |
live_to_right -= c->data_size(); |
|
370 |
++i; |
|
371 |
} |
|
372 |
||
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|
373 |
// Any remaining regions are empty. Print one more if there is one. |
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|
374 |
if (i < end_region) { |
35061 | 375 |
ParallelCompactData::RegionData* c = summary_data.region(i); |
37146 | 376 |
log_develop_trace(gc, compaction)( |
35061 | 377 |
SIZE_FORMAT_W(5) " " PTR_FORMAT " " SIZE_FORMAT_W(5) " " SIZE_FORMAT_W(5) " " SIZE_FORMAT_W(5) " " SIZE_FORMAT_W(5) " %d", |
378 |
i, p2i(c->destination()), |
|
379 |
c->partial_obj_size(), c->live_obj_size(), |
|
380 |
c->data_size(), c->source_region(), c->destination_count()); |
|
1 | 381 |
} |
382 |
||
37146 | 383 |
log_develop_trace(gc, compaction)("max: " SIZE_FORMAT_W(4) " d2r=" SIZE_FORMAT_W(10) " l2r=" SIZE_FORMAT_W(10) " max_ratio=%14.12f", |
384 |
max_reclaimed_ratio_region, max_dead_to_right, max_live_to_right, max_reclaimed_ratio); |
|
1 | 385 |
} |
386 |
||
387 |
void |
|
388 |
print_initial_summary_data(ParallelCompactData& summary_data, |
|
389 |
SpaceInfo* space_info) { |
|
37146 | 390 |
if (!log_develop_is_enabled(Trace, gc, compaction)) { |
35061 | 391 |
return; |
392 |
} |
|
393 |
||
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13195
diff
changeset
|
394 |
unsigned int id = PSParallelCompact::old_space_id; |
1 | 395 |
const MutableSpace* space; |
396 |
do { |
|
397 |
space = space_info[id].space(); |
|
398 |
print_initial_summary_data(summary_data, space); |
|
399 |
} while (++id < PSParallelCompact::eden_space_id); |
|
400 |
||
401 |
do { |
|
402 |
space = space_info[id].space(); |
|
403 |
print_generic_summary_data(summary_data, space->bottom(), space->top()); |
|
404 |
} while (++id < PSParallelCompact::last_space_id); |
|
405 |
} |
|
406 |
#endif // #ifndef PRODUCT |
|
407 |
||
408 |
#ifdef ASSERT |
|
409 |
size_t add_obj_count; |
|
410 |
size_t add_obj_size; |
|
411 |
size_t mark_bitmap_count; |
|
412 |
size_t mark_bitmap_size; |
|
413 |
#endif // #ifdef ASSERT |
|
414 |
||
54264
41af8d0546bc
8221260: Initialize more class members on construction, remove some unused ones
lkorinth
parents:
54178
diff
changeset
|
415 |
ParallelCompactData::ParallelCompactData() : |
41af8d0546bc
8221260: Initialize more class members on construction, remove some unused ones
lkorinth
parents:
54178
diff
changeset
|
416 |
_region_start(NULL), |
41af8d0546bc
8221260: Initialize more class members on construction, remove some unused ones
lkorinth
parents:
54178
diff
changeset
|
417 |
DEBUG_ONLY(_region_end(NULL) COMMA) |
41af8d0546bc
8221260: Initialize more class members on construction, remove some unused ones
lkorinth
parents:
54178
diff
changeset
|
418 |
_region_vspace(NULL), |
41af8d0546bc
8221260: Initialize more class members on construction, remove some unused ones
lkorinth
parents:
54178
diff
changeset
|
419 |
_reserved_byte_size(0), |
41af8d0546bc
8221260: Initialize more class members on construction, remove some unused ones
lkorinth
parents:
54178
diff
changeset
|
420 |
_region_data(NULL), |
41af8d0546bc
8221260: Initialize more class members on construction, remove some unused ones
lkorinth
parents:
54178
diff
changeset
|
421 |
_region_count(0), |
41af8d0546bc
8221260: Initialize more class members on construction, remove some unused ones
lkorinth
parents:
54178
diff
changeset
|
422 |
_block_vspace(NULL), |
41af8d0546bc
8221260: Initialize more class members on construction, remove some unused ones
lkorinth
parents:
54178
diff
changeset
|
423 |
_block_data(NULL), |
41af8d0546bc
8221260: Initialize more class members on construction, remove some unused ones
lkorinth
parents:
54178
diff
changeset
|
424 |
_block_count(0) {} |
1 | 425 |
|
426 |
bool ParallelCompactData::initialize(MemRegion covered_region) |
|
427 |
{ |
|
428 |
_region_start = covered_region.start(); |
|
429 |
const size_t region_size = covered_region.word_size(); |
|
430 |
DEBUG_ONLY(_region_end = _region_start + region_size;) |
|
431 |
||
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
432 |
assert(region_align_down(_region_start) == _region_start, |
1 | 433 |
"region start not aligned"); |
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
434 |
assert((region_size & RegionSizeOffsetMask) == 0, |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
435 |
"region size not a multiple of RegionSize"); |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
436 |
|
17851
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
437 |
bool result = initialize_region_data(region_size) && initialize_block_data(); |
1 | 438 |
return result; |
439 |
} |
|
440 |
||
441 |
PSVirtualSpace* |
|
442 |
ParallelCompactData::create_vspace(size_t count, size_t element_size) |
|
443 |
{ |
|
444 |
const size_t raw_bytes = count * element_size; |
|
28631 | 445 |
const size_t page_sz = os::page_size_for_region_aligned(raw_bytes, 10); |
1 | 446 |
const size_t granularity = os::vm_allocation_granularity(); |
46619
a3919f5e8d2b
8178499: Remove _ptr_ and _size_ infixes from align functions
stefank
parents:
46560
diff
changeset
|
447 |
_reserved_byte_size = align_up(raw_bytes, MAX2(page_sz, granularity)); |
1 | 448 |
|
449 |
const size_t rs_align = page_sz == (size_t) os::vm_page_size() ? 0 : |
|
450 |
MAX2(page_sz, granularity); |
|
17627
325871034f2c
7186737: Unable to allocate bit maps or card tables for parallel gc for the requested heap
tamao
parents:
17625
diff
changeset
|
451 |
ReservedSpace rs(_reserved_byte_size, rs_align, rs_align > 0); |
37462 | 452 |
os::trace_page_sizes("Parallel Compact Data", raw_bytes, raw_bytes, page_sz, rs.base(), |
1 | 453 |
rs.size()); |
13195 | 454 |
|
455 |
MemTracker::record_virtual_memory_type((address)rs.base(), mtGC); |
|
456 |
||
1 | 457 |
PSVirtualSpace* vspace = new PSVirtualSpace(rs, page_sz); |
458 |
if (vspace != 0) { |
|
17627
325871034f2c
7186737: Unable to allocate bit maps or card tables for parallel gc for the requested heap
tamao
parents:
17625
diff
changeset
|
459 |
if (vspace->expand_by(_reserved_byte_size)) { |
1 | 460 |
return vspace; |
461 |
} |
|
462 |
delete vspace; |
|
823
9a5271881bc0
6716785: implicit null checks not triggering with CompressedOops
coleenp
parents:
781
diff
changeset
|
463 |
// Release memory reserved in the space. |
9a5271881bc0
6716785: implicit null checks not triggering with CompressedOops
coleenp
parents:
781
diff
changeset
|
464 |
rs.release(); |
1 | 465 |
} |
466 |
||
467 |
return 0; |
|
468 |
} |
|
469 |
||
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
470 |
bool ParallelCompactData::initialize_region_data(size_t region_size) |
1 | 471 |
{ |
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
472 |
const size_t count = (region_size + RegionSizeOffsetMask) >> Log2RegionSize; |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
473 |
_region_vspace = create_vspace(count, sizeof(RegionData)); |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
474 |
if (_region_vspace != 0) { |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
475 |
_region_data = (RegionData*)_region_vspace->reserved_low_addr(); |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
476 |
_region_count = count; |
1 | 477 |
return true; |
478 |
} |
|
479 |
return false; |
|
480 |
} |
|
481 |
||
17851
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
482 |
bool ParallelCompactData::initialize_block_data() |
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
483 |
{ |
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
484 |
assert(_region_count != 0, "region data must be initialized first"); |
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
485 |
const size_t count = _region_count << Log2BlocksPerRegion; |
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
486 |
_block_vspace = create_vspace(count, sizeof(BlockData)); |
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
487 |
if (_block_vspace != 0) { |
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
488 |
_block_data = (BlockData*)_block_vspace->reserved_low_addr(); |
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
489 |
_block_count = count; |
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
490 |
return true; |
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
491 |
} |
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
492 |
return false; |
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
493 |
} |
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
494 |
|
1 | 495 |
void ParallelCompactData::clear() |
496 |
{ |
|
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
497 |
memset(_region_data, 0, _region_vspace->committed_size()); |
17851
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
498 |
memset(_block_data, 0, _block_vspace->committed_size()); |
1 | 499 |
} |
500 |
||
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
501 |
void ParallelCompactData::clear_range(size_t beg_region, size_t end_region) { |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
502 |
assert(beg_region <= _region_count, "beg_region out of range"); |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
503 |
assert(end_region <= _region_count, "end_region out of range"); |
17851
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
504 |
assert(RegionSize % BlockSize == 0, "RegionSize not a multiple of BlockSize"); |
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
505 |
|
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
506 |
const size_t region_cnt = end_region - beg_region; |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
507 |
memset(_region_data + beg_region, 0, region_cnt * sizeof(RegionData)); |
17851
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
508 |
|
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
509 |
const size_t beg_block = beg_region * BlocksPerRegion; |
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
510 |
const size_t block_cnt = region_cnt * BlocksPerRegion; |
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
511 |
memset(_block_data + beg_block, 0, block_cnt * sizeof(BlockData)); |
1 | 512 |
} |
513 |
||
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
514 |
HeapWord* ParallelCompactData::partial_obj_end(size_t region_idx) const |
1 | 515 |
{ |
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
516 |
const RegionData* cur_cp = region(region_idx); |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
517 |
const RegionData* const end_cp = region(region_count() - 1); |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
518 |
|
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
519 |
HeapWord* result = region_to_addr(region_idx); |
1 | 520 |
if (cur_cp < end_cp) { |
521 |
do { |
|
522 |
result += cur_cp->partial_obj_size(); |
|
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
523 |
} while (cur_cp->partial_obj_size() == RegionSize && ++cur_cp < end_cp); |
1 | 524 |
} |
525 |
return result; |
|
526 |
} |
|
527 |
||
528 |
void ParallelCompactData::add_obj(HeapWord* addr, size_t len) |
|
529 |
{ |
|
530 |
const size_t obj_ofs = pointer_delta(addr, _region_start); |
|
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
531 |
const size_t beg_region = obj_ofs >> Log2RegionSize; |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
532 |
const size_t end_region = (obj_ofs + len - 1) >> Log2RegionSize; |
1 | 533 |
|
47552
8a3599d60996
8186838: Generalize Atomic::inc/dec with templates
eosterlund
parents:
47546
diff
changeset
|
534 |
DEBUG_ONLY(Atomic::inc(&add_obj_count);) |
59249
29b0d0b61615
8234737: Harmonize parameter order in Atomic - add
stefank
parents:
59008
diff
changeset
|
535 |
DEBUG_ONLY(Atomic::add(&add_obj_size, len);) |
1 | 536 |
|
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
537 |
if (beg_region == end_region) { |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
538 |
// All in one region. |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
539 |
_region_data[beg_region].add_live_obj(len); |
1 | 540 |
return; |
541 |
} |
|
542 |
||
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
543 |
// First region. |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
544 |
const size_t beg_ofs = region_offset(addr); |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
545 |
_region_data[beg_region].add_live_obj(RegionSize - beg_ofs); |
1 | 546 |
|
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13195
diff
changeset
|
547 |
Klass* klass = ((oop)addr)->klass(); |
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
548 |
// Middle regions--completely spanned by this object. |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
549 |
for (size_t region = beg_region + 1; region < end_region; ++region) { |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
550 |
_region_data[region].set_partial_obj_size(RegionSize); |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
551 |
_region_data[region].set_partial_obj_addr(addr); |
1 | 552 |
} |
553 |
||
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
554 |
// Last region. |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
555 |
const size_t end_ofs = region_offset(addr + len - 1); |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
556 |
_region_data[end_region].set_partial_obj_size(end_ofs + 1); |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
557 |
_region_data[end_region].set_partial_obj_addr(addr); |
1 | 558 |
} |
559 |
||
560 |
void |
|
561 |
ParallelCompactData::summarize_dense_prefix(HeapWord* beg, HeapWord* end) |
|
562 |
{ |
|
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
563 |
assert(region_offset(beg) == 0, "not RegionSize aligned"); |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
564 |
assert(region_offset(end) == 0, "not RegionSize aligned"); |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
565 |
|
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
566 |
size_t cur_region = addr_to_region_idx(beg); |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
567 |
const size_t end_region = addr_to_region_idx(end); |
1 | 568 |
HeapWord* addr = beg; |
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
569 |
while (cur_region < end_region) { |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
570 |
_region_data[cur_region].set_destination(addr); |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
571 |
_region_data[cur_region].set_destination_count(0); |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
572 |
_region_data[cur_region].set_source_region(cur_region); |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
573 |
_region_data[cur_region].set_data_location(addr); |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
574 |
|
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
575 |
// Update live_obj_size so the region appears completely full. |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
576 |
size_t live_size = RegionSize - _region_data[cur_region].partial_obj_size(); |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
577 |
_region_data[cur_region].set_live_obj_size(live_size); |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
578 |
|
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
579 |
++cur_region; |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
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diff
changeset
|
580 |
addr += RegionSize; |
1 | 581 |
} |
582 |
} |
|
583 |
||
1669
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
584 |
// Find the point at which a space can be split and, if necessary, record the |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
585 |
// split point. |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
586 |
// |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
587 |
// If the current src region (which overflowed the destination space) doesn't |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
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changeset
|
588 |
// have a partial object, the split point is at the beginning of the current src |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
589 |
// region (an "easy" split, no extra bookkeeping required). |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
590 |
// |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
591 |
// If the current src region has a partial object, the split point is in the |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
592 |
// region where that partial object starts (call it the split_region). If |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
593 |
// split_region has a partial object, then the split point is just after that |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
594 |
// partial object (a "hard" split where we have to record the split data and |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
595 |
// zero the partial_obj_size field). With a "hard" split, we know that the |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
596 |
// partial_obj ends within split_region because the partial object that caused |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
597 |
// the overflow starts in split_region. If split_region doesn't have a partial |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
598 |
// obj, then the split is at the beginning of split_region (another "easy" |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
599 |
// split). |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
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1668
diff
changeset
|
600 |
HeapWord* |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
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1668
diff
changeset
|
601 |
ParallelCompactData::summarize_split_space(size_t src_region, |
c921639400dd
6765745: par compact - allow young gen spaces to be split
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parents:
1668
diff
changeset
|
602 |
SplitInfo& split_info, |
c921639400dd
6765745: par compact - allow young gen spaces to be split
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parents:
1668
diff
changeset
|
603 |
HeapWord* destination, |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
604 |
HeapWord* target_end, |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
605 |
HeapWord** target_next) |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
606 |
{ |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
607 |
assert(destination <= target_end, "sanity"); |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
608 |
assert(destination + _region_data[src_region].data_size() > target_end, |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
609 |
"region should not fit into target space"); |
2363
f09f17e0ebc7
6810474: par compact - crash in summary_phase with very full heap
jcoomes
parents:
2154
diff
changeset
|
610 |
assert(is_region_aligned(target_end), "sanity"); |
1669
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
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diff
changeset
|
611 |
|
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
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diff
changeset
|
612 |
size_t split_region = src_region; |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
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diff
changeset
|
613 |
HeapWord* split_destination = destination; |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
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diff
changeset
|
614 |
size_t partial_obj_size = _region_data[src_region].partial_obj_size(); |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
615 |
|
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
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diff
changeset
|
616 |
if (destination + partial_obj_size > target_end) { |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
617 |
// The split point is just after the partial object (if any) in the |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
618 |
// src_region that contains the start of the object that overflowed the |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
619 |
// destination space. |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
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diff
changeset
|
620 |
// |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
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diff
changeset
|
621 |
// Find the start of the "overflow" object and set split_region to the |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
622 |
// region containing it. |
c921639400dd
6765745: par compact - allow young gen spaces to be split
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parents:
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diff
changeset
|
623 |
HeapWord* const overflow_obj = _region_data[src_region].partial_obj_addr(); |
c921639400dd
6765745: par compact - allow young gen spaces to be split
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diff
changeset
|
624 |
split_region = addr_to_region_idx(overflow_obj); |
c921639400dd
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parents:
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diff
changeset
|
625 |
|
c921639400dd
6765745: par compact - allow young gen spaces to be split
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parents:
1668
diff
changeset
|
626 |
// Clear the source_region field of all destination regions whose first word |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
627 |
// came from data after the split point (a non-null source_region field |
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6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
628 |
// implies a region must be filled). |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
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diff
changeset
|
629 |
// |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
630 |
// An alternative to the simple loop below: clear during post_compact(), |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
631 |
// which uses memcpy instead of individual stores, and is easy to |
c921639400dd
6765745: par compact - allow young gen spaces to be split
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diff
changeset
|
632 |
// parallelize. (The downside is that it clears the entire RegionData |
c921639400dd
6765745: par compact - allow young gen spaces to be split
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1668
diff
changeset
|
633 |
// object as opposed to just one field.) |
c921639400dd
6765745: par compact - allow young gen spaces to be split
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diff
changeset
|
634 |
// |
c921639400dd
6765745: par compact - allow young gen spaces to be split
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diff
changeset
|
635 |
// post_compact() would have to clear the summary data up to the highest |
c921639400dd
6765745: par compact - allow young gen spaces to be split
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1668
diff
changeset
|
636 |
// address that was written during the summary phase, which would be |
c921639400dd
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jcoomes
parents:
1668
diff
changeset
|
637 |
// |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
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diff
changeset
|
638 |
// max(top, max(new_top, clear_top)) |
c921639400dd
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jcoomes
parents:
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diff
changeset
|
639 |
// |
c921639400dd
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parents:
1668
diff
changeset
|
640 |
// where clear_top is a new field in SpaceInfo. Would have to set clear_top |
2363
f09f17e0ebc7
6810474: par compact - crash in summary_phase with very full heap
jcoomes
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2154
diff
changeset
|
641 |
// to target_end. |
1669
c921639400dd
6765745: par compact - allow young gen spaces to be split
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diff
changeset
|
642 |
const RegionData* const sr = region(split_region); |
c921639400dd
6765745: par compact - allow young gen spaces to be split
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diff
changeset
|
643 |
const size_t beg_idx = |
c921639400dd
6765745: par compact - allow young gen spaces to be split
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diff
changeset
|
644 |
addr_to_region_idx(region_align_up(sr->destination() + |
c921639400dd
6765745: par compact - allow young gen spaces to be split
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parents:
1668
diff
changeset
|
645 |
sr->partial_obj_size())); |
2363
f09f17e0ebc7
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parents:
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diff
changeset
|
646 |
const size_t end_idx = addr_to_region_idx(target_end); |
1669
c921639400dd
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jcoomes
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changeset
|
647 |
|
37146 | 648 |
log_develop_trace(gc, compaction)("split: clearing source_region field in [" SIZE_FORMAT ", " SIZE_FORMAT ")", beg_idx, end_idx); |
1669
c921639400dd
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jcoomes
parents:
1668
diff
changeset
|
649 |
for (size_t idx = beg_idx; idx < end_idx; ++idx) { |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
650 |
_region_data[idx].set_source_region(0); |
c921639400dd
6765745: par compact - allow young gen spaces to be split
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diff
changeset
|
651 |
} |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
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diff
changeset
|
652 |
|
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
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diff
changeset
|
653 |
// Set split_destination and partial_obj_size to reflect the split region. |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
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1668
diff
changeset
|
654 |
split_destination = sr->destination(); |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
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1668
diff
changeset
|
655 |
partial_obj_size = sr->partial_obj_size(); |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
656 |
} |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
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diff
changeset
|
657 |
|
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
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1668
diff
changeset
|
658 |
// The split is recorded only if a partial object extends onto the region. |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
659 |
if (partial_obj_size != 0) { |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
660 |
_region_data[split_region].set_partial_obj_size(0); |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
661 |
split_info.record(split_region, partial_obj_size, split_destination); |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
662 |
} |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
663 |
|
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
664 |
// Setup the continuation addresses. |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
665 |
*target_next = split_destination + partial_obj_size; |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
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diff
changeset
|
666 |
HeapWord* const source_next = region_to_addr(split_region) + partial_obj_size; |
1 | 667 |
|
37146 | 668 |
if (log_develop_is_enabled(Trace, gc, compaction)) { |
1669
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
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1668
diff
changeset
|
669 |
const char * split_type = partial_obj_size == 0 ? "easy" : "hard"; |
37146 | 670 |
log_develop_trace(gc, compaction)("%s split: src=" PTR_FORMAT " src_c=" SIZE_FORMAT " pos=" SIZE_FORMAT, |
671 |
split_type, p2i(source_next), split_region, partial_obj_size); |
|
672 |
log_develop_trace(gc, compaction)("%s split: dst=" PTR_FORMAT " dst_c=" SIZE_FORMAT " tn=" PTR_FORMAT, |
|
673 |
split_type, p2i(split_destination), |
|
674 |
addr_to_region_idx(split_destination), |
|
675 |
p2i(*target_next)); |
|
1669
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
676 |
|
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
677 |
if (partial_obj_size != 0) { |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
678 |
HeapWord* const po_beg = split_info.destination(); |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
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1668
diff
changeset
|
679 |
HeapWord* const po_end = po_beg + split_info.partial_obj_size(); |
37146 | 680 |
log_develop_trace(gc, compaction)("%s split: po_beg=" PTR_FORMAT " " SIZE_FORMAT " po_end=" PTR_FORMAT " " SIZE_FORMAT, |
681 |
split_type, |
|
682 |
p2i(po_beg), addr_to_region_idx(po_beg), |
|
683 |
p2i(po_end), addr_to_region_idx(po_end)); |
|
1669
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
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1668
diff
changeset
|
684 |
} |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
685 |
} |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
686 |
|
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
687 |
return source_next; |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
688 |
} |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
689 |
|
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
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1668
diff
changeset
|
690 |
bool ParallelCompactData::summarize(SplitInfo& split_info, |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
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1668
diff
changeset
|
691 |
HeapWord* source_beg, HeapWord* source_end, |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
692 |
HeapWord** source_next, |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
693 |
HeapWord* target_beg, HeapWord* target_end, |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
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1668
diff
changeset
|
694 |
HeapWord** target_next) |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
695 |
{ |
35061 | 696 |
HeapWord* const source_next_val = source_next == NULL ? NULL : *source_next; |
37146 | 697 |
log_develop_trace(gc, compaction)( |
35061 | 698 |
"sb=" PTR_FORMAT " se=" PTR_FORMAT " sn=" PTR_FORMAT |
699 |
"tb=" PTR_FORMAT " te=" PTR_FORMAT " tn=" PTR_FORMAT, |
|
700 |
p2i(source_beg), p2i(source_end), p2i(source_next_val), |
|
701 |
p2i(target_beg), p2i(target_end), p2i(*target_next)); |
|
1 | 702 |
|
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
703 |
size_t cur_region = addr_to_region_idx(source_beg); |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
704 |
const size_t end_region = addr_to_region_idx(region_align_up(source_end)); |
1 | 705 |
|
706 |
HeapWord *dest_addr = target_beg; |
|
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
707 |
while (cur_region < end_region) { |
1669
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
708 |
// The destination must be set even if the region has no data. |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
709 |
_region_data[cur_region].set_destination(dest_addr); |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
710 |
|
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
711 |
size_t words = _region_data[cur_region].data_size(); |
1 | 712 |
if (words > 0) { |
1669
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
713 |
// If cur_region does not fit entirely into the target space, find a point |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
714 |
// at which the source space can be 'split' so that part is copied to the |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
715 |
// target space and the rest is copied elsewhere. |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
716 |
if (dest_addr + words > target_end) { |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
717 |
assert(source_next != NULL, "source_next is NULL when splitting"); |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
718 |
*source_next = summarize_split_space(cur_region, split_info, dest_addr, |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
719 |
target_end, target_next); |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
720 |
return false; |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
721 |
} |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
722 |
|
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
723 |
// Compute the destination_count for cur_region, and if necessary, update |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
724 |
// source_region for a destination region. The source_region field is |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
725 |
// updated if cur_region is the first (left-most) region to be copied to a |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
726 |
// destination region. |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
727 |
// |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
728 |
// The destination_count calculation is a bit subtle. A region that has |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
729 |
// data that compacts into itself does not count itself as a destination. |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
730 |
// This maintains the invariant that a zero count means the region is |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
731 |
// available and can be claimed and then filled. |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
732 |
uint destination_count = 0; |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
733 |
if (split_info.is_split(cur_region)) { |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
734 |
// The current region has been split: the partial object will be copied |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
735 |
// to one destination space and the remaining data will be copied to |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
736 |
// another destination space. Adjust the initial destination_count and, |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
737 |
// if necessary, set the source_region field if the partial object will |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
738 |
// cross a destination region boundary. |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
739 |
destination_count = split_info.destination_count(); |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
740 |
if (destination_count == 2) { |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
741 |
size_t dest_idx = addr_to_region_idx(split_info.dest_region_addr()); |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
742 |
_region_data[dest_idx].set_source_region(cur_region); |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
743 |
} |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
744 |
} |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
745 |
|
1 | 746 |
HeapWord* const last_addr = dest_addr + words - 1; |
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
747 |
const size_t dest_region_1 = addr_to_region_idx(dest_addr); |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
748 |
const size_t dest_region_2 = addr_to_region_idx(last_addr); |
1669
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
749 |
|
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
750 |
// Initially assume that the destination regions will be the same and |
1 | 751 |
// adjust the value below if necessary. Under this assumption, if |
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
752 |
// cur_region == dest_region_2, then cur_region will be compacted |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
753 |
// completely into itself. |
1669
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
754 |
destination_count += cur_region == dest_region_2 ? 0 : 1; |
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
755 |
if (dest_region_1 != dest_region_2) { |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
756 |
// Destination regions differ; adjust destination_count. |
1 | 757 |
destination_count += 1; |
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
758 |
// Data from cur_region will be copied to the start of dest_region_2. |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
759 |
_region_data[dest_region_2].set_source_region(cur_region); |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
760 |
} else if (region_offset(dest_addr) == 0) { |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
761 |
// Data from cur_region will be copied to the start of the destination |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
762 |
// region. |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
763 |
_region_data[dest_region_1].set_source_region(cur_region); |
1 | 764 |
} |
765 |
||
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
766 |
_region_data[cur_region].set_destination_count(destination_count); |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
767 |
_region_data[cur_region].set_data_location(region_to_addr(cur_region)); |
1 | 768 |
dest_addr += words; |
769 |
} |
|
770 |
||
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
771 |
++cur_region; |
1 | 772 |
} |
773 |
||
774 |
*target_next = dest_addr; |
|
775 |
return true; |
|
776 |
} |
|
777 |
||
35877
a2a62511d0f8
8146987: Improve Parallel GC Full GC by caching results of live_words_in_range()
tschatzl
parents:
35862
diff
changeset
|
778 |
HeapWord* ParallelCompactData::calc_new_pointer(HeapWord* addr, ParCompactionManager* cm) { |
1 | 779 |
assert(addr != NULL, "Should detect NULL oop earlier"); |
30173
13cf7580b000
8077413: Avoid use of Universe::heap() inside collectors
pliden
parents:
30150
diff
changeset
|
780 |
assert(ParallelScavengeHeap::heap()->is_in(addr), "not in heap"); |
17851
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
781 |
assert(PSParallelCompact::mark_bitmap()->is_marked(addr), "not marked"); |
1 | 782 |
|
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
783 |
// Region covering the object. |
17851
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
784 |
RegionData* const region_ptr = addr_to_region_ptr(addr); |
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
785 |
HeapWord* result = region_ptr->destination(); |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
786 |
|
17851
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
787 |
// If the entire Region is live, the new location is region->destination + the |
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
788 |
// offset of the object within in the Region. |
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
789 |
|
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
790 |
// Run some performance tests to determine if this special case pays off. It |
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
791 |
// is worth it for pointers into the dense prefix. If the optimization to |
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
792 |
// avoid pointer updates in regions that only point to the dense prefix is |
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
793 |
// ever implemented, this should be revisited. |
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
794 |
if (region_ptr->data_size() == RegionSize) { |
17851
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
795 |
result += region_offset(addr); |
1 | 796 |
return result; |
797 |
} |
|
798 |
||
17851
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
799 |
// Otherwise, the new location is region->destination + block offset + the |
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
800 |
// number of live words in the Block that are (a) to the left of addr and (b) |
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
801 |
// due to objects that start in the Block. |
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
802 |
|
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
803 |
// Fill in the block table if necessary. This is unsynchronized, so multiple |
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
804 |
// threads may fill the block table for a region (harmless, since it is |
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
805 |
// idempotent). |
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
806 |
if (!region_ptr->blocks_filled()) { |
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
807 |
PSParallelCompact::fill_blocks(addr_to_region_idx(addr)); |
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
808 |
region_ptr->set_blocks_filled(); |
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
809 |
} |
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
810 |
|
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
811 |
HeapWord* const search_start = block_align_down(addr); |
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
812 |
const size_t block_offset = addr_to_block_ptr(addr)->offset(); |
1 | 813 |
|
814 |
const ParMarkBitMap* bitmap = PSParallelCompact::mark_bitmap(); |
|
35877
a2a62511d0f8
8146987: Improve Parallel GC Full GC by caching results of live_words_in_range()
tschatzl
parents:
35862
diff
changeset
|
815 |
const size_t live = bitmap->live_words_in_range(cm, search_start, oop(addr)); |
17851
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
816 |
result += block_offset + live; |
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
817 |
DEBUG_ONLY(PSParallelCompact::check_new_location(addr, result)); |
1 | 818 |
return result; |
819 |
} |
|
820 |
||
17851
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
821 |
#ifdef ASSERT |
1 | 822 |
void ParallelCompactData::verify_clear(const PSVirtualSpace* vspace) |
823 |
{ |
|
824 |
const size_t* const beg = (const size_t*)vspace->committed_low_addr(); |
|
825 |
const size_t* const end = (const size_t*)vspace->committed_high_addr(); |
|
826 |
for (const size_t* p = beg; p < end; ++p) { |
|
827 |
assert(*p == 0, "not zero"); |
|
828 |
} |
|
829 |
} |
|
830 |
||
831 |
void ParallelCompactData::verify_clear() |
|
832 |
{ |
|
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
833 |
verify_clear(_region_vspace); |
17851
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
834 |
verify_clear(_block_vspace); |
1 | 835 |
} |
836 |
#endif // #ifdef ASSERT |
|
837 |
||
18025 | 838 |
STWGCTimer PSParallelCompact::_gc_timer; |
839 |
ParallelOldTracer PSParallelCompact::_gc_tracer; |
|
1 | 840 |
elapsedTimer PSParallelCompact::_accumulated_time; |
841 |
unsigned int PSParallelCompact::_total_invocations = 0; |
|
842 |
unsigned int PSParallelCompact::_maximum_compaction_gc_num = 0; |
|
843 |
jlong PSParallelCompact::_time_of_last_gc = 0; |
|
844 |
CollectorCounters* PSParallelCompact::_counters = NULL; |
|
845 |
ParMarkBitMap PSParallelCompact::_mark_bitmap; |
|
846 |
ParallelCompactData PSParallelCompact::_summary_data; |
|
847 |
||
848 |
PSParallelCompact::IsAliveClosure PSParallelCompact::_is_alive_closure; |
|
360
21d113ecbf6a
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
252
diff
changeset
|
849 |
|
21d113ecbf6a
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
252
diff
changeset
|
850 |
bool PSParallelCompact::IsAliveClosure::do_object_b(oop p) { return mark_bitmap()->is_marked(p); } |
21d113ecbf6a
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
252
diff
changeset
|
851 |
|
52118
49f627781c2a
8211446: Replace oop_pc_follow_contents with oop_iterate and closure
lkorinth
parents:
51978
diff
changeset
|
852 |
class PCReferenceProcessor: public ReferenceProcessor { |
49f627781c2a
8211446: Replace oop_pc_follow_contents with oop_iterate and closure
lkorinth
parents:
51978
diff
changeset
|
853 |
public: |
49f627781c2a
8211446: Replace oop_pc_follow_contents with oop_iterate and closure
lkorinth
parents:
51978
diff
changeset
|
854 |
PCReferenceProcessor( |
49f627781c2a
8211446: Replace oop_pc_follow_contents with oop_iterate and closure
lkorinth
parents:
51978
diff
changeset
|
855 |
BoolObjectClosure* is_subject_to_discovery, |
49f627781c2a
8211446: Replace oop_pc_follow_contents with oop_iterate and closure
lkorinth
parents:
51978
diff
changeset
|
856 |
BoolObjectClosure* is_alive_non_header) : |
49f627781c2a
8211446: Replace oop_pc_follow_contents with oop_iterate and closure
lkorinth
parents:
51978
diff
changeset
|
857 |
ReferenceProcessor(is_subject_to_discovery, |
49f627781c2a
8211446: Replace oop_pc_follow_contents with oop_iterate and closure
lkorinth
parents:
51978
diff
changeset
|
858 |
ParallelRefProcEnabled && (ParallelGCThreads > 1), // mt processing |
49f627781c2a
8211446: Replace oop_pc_follow_contents with oop_iterate and closure
lkorinth
parents:
51978
diff
changeset
|
859 |
ParallelGCThreads, // mt processing degree |
49f627781c2a
8211446: Replace oop_pc_follow_contents with oop_iterate and closure
lkorinth
parents:
51978
diff
changeset
|
860 |
true, // mt discovery |
49f627781c2a
8211446: Replace oop_pc_follow_contents with oop_iterate and closure
lkorinth
parents:
51978
diff
changeset
|
861 |
ParallelGCThreads, // mt discovery degree |
49f627781c2a
8211446: Replace oop_pc_follow_contents with oop_iterate and closure
lkorinth
parents:
51978
diff
changeset
|
862 |
true, // atomic_discovery |
49f627781c2a
8211446: Replace oop_pc_follow_contents with oop_iterate and closure
lkorinth
parents:
51978
diff
changeset
|
863 |
is_alive_non_header) { |
49f627781c2a
8211446: Replace oop_pc_follow_contents with oop_iterate and closure
lkorinth
parents:
51978
diff
changeset
|
864 |
} |
49f627781c2a
8211446: Replace oop_pc_follow_contents with oop_iterate and closure
lkorinth
parents:
51978
diff
changeset
|
865 |
|
49f627781c2a
8211446: Replace oop_pc_follow_contents with oop_iterate and closure
lkorinth
parents:
51978
diff
changeset
|
866 |
template<typename T> bool discover(oop obj, ReferenceType type) { |
49f627781c2a
8211446: Replace oop_pc_follow_contents with oop_iterate and closure
lkorinth
parents:
51978
diff
changeset
|
867 |
T* referent_addr = (T*) java_lang_ref_Reference::referent_addr_raw(obj); |
49f627781c2a
8211446: Replace oop_pc_follow_contents with oop_iterate and closure
lkorinth
parents:
51978
diff
changeset
|
868 |
T heap_oop = RawAccess<>::oop_load(referent_addr); |
49f627781c2a
8211446: Replace oop_pc_follow_contents with oop_iterate and closure
lkorinth
parents:
51978
diff
changeset
|
869 |
oop referent = CompressedOops::decode_not_null(heap_oop); |
49f627781c2a
8211446: Replace oop_pc_follow_contents with oop_iterate and closure
lkorinth
parents:
51978
diff
changeset
|
870 |
return PSParallelCompact::mark_bitmap()->is_unmarked(referent) |
49f627781c2a
8211446: Replace oop_pc_follow_contents with oop_iterate and closure
lkorinth
parents:
51978
diff
changeset
|
871 |
&& ReferenceProcessor::discover_reference(obj, type); |
49f627781c2a
8211446: Replace oop_pc_follow_contents with oop_iterate and closure
lkorinth
parents:
51978
diff
changeset
|
872 |
} |
49f627781c2a
8211446: Replace oop_pc_follow_contents with oop_iterate and closure
lkorinth
parents:
51978
diff
changeset
|
873 |
virtual bool discover_reference(oop obj, ReferenceType type) { |
49f627781c2a
8211446: Replace oop_pc_follow_contents with oop_iterate and closure
lkorinth
parents:
51978
diff
changeset
|
874 |
if (UseCompressedOops) { |
49f627781c2a
8211446: Replace oop_pc_follow_contents with oop_iterate and closure
lkorinth
parents:
51978
diff
changeset
|
875 |
return discover<narrowOop>(obj, type); |
49f627781c2a
8211446: Replace oop_pc_follow_contents with oop_iterate and closure
lkorinth
parents:
51978
diff
changeset
|
876 |
} else { |
49f627781c2a
8211446: Replace oop_pc_follow_contents with oop_iterate and closure
lkorinth
parents:
51978
diff
changeset
|
877 |
return discover<oop>(obj, type); |
49f627781c2a
8211446: Replace oop_pc_follow_contents with oop_iterate and closure
lkorinth
parents:
51978
diff
changeset
|
878 |
} |
49f627781c2a
8211446: Replace oop_pc_follow_contents with oop_iterate and closure
lkorinth
parents:
51978
diff
changeset
|
879 |
} |
49f627781c2a
8211446: Replace oop_pc_follow_contents with oop_iterate and closure
lkorinth
parents:
51978
diff
changeset
|
880 |
}; |
49f627781c2a
8211446: Replace oop_pc_follow_contents with oop_iterate and closure
lkorinth
parents:
51978
diff
changeset
|
881 |
|
1 | 882 |
void PSParallelCompact::post_initialize() { |
30173
13cf7580b000
8077413: Avoid use of Universe::heap() inside collectors
pliden
parents:
30150
diff
changeset
|
883 |
ParallelScavengeHeap* heap = ParallelScavengeHeap::heap(); |
49964
99e698e94cc7
8201492: Properly implement non-contiguous generations for Reference discovery
tschatzl
parents:
49821
diff
changeset
|
884 |
_span_based_discoverer.set_span(heap->reserved_region()); |
8688
493d12ccc6db
6668573: CMS: reference processing crash if ParallelCMSThreads > ParallelGCThreads
ysr
parents:
8076
diff
changeset
|
885 |
_ref_processor = |
52118
49f627781c2a
8211446: Replace oop_pc_follow_contents with oop_iterate and closure
lkorinth
parents:
51978
diff
changeset
|
886 |
new PCReferenceProcessor(&_span_based_discoverer, |
49f627781c2a
8211446: Replace oop_pc_follow_contents with oop_iterate and closure
lkorinth
parents:
51978
diff
changeset
|
887 |
&_is_alive_closure); // non-header is alive closure |
49f627781c2a
8211446: Replace oop_pc_follow_contents with oop_iterate and closure
lkorinth
parents:
51978
diff
changeset
|
888 |
|
53726 | 889 |
_counters = new CollectorCounters("Parallel full collection pauses", 1); |
1 | 890 |
|
891 |
// Initialize static fields in ParCompactionManager. |
|
892 |
ParCompactionManager::initialize(mark_bitmap()); |
|
893 |
} |
|
894 |
||
895 |
bool PSParallelCompact::initialize() { |
|
30173
13cf7580b000
8077413: Avoid use of Universe::heap() inside collectors
pliden
parents:
30150
diff
changeset
|
896 |
ParallelScavengeHeap* heap = ParallelScavengeHeap::heap(); |
1 | 897 |
MemRegion mr = heap->reserved_region(); |
898 |
||
899 |
// Was the old gen get allocated successfully? |
|
900 |
if (!heap->old_gen()->is_allocated()) { |
|
901 |
return false; |
|
902 |
} |
|
903 |
||
904 |
initialize_space_info(); |
|
905 |
initialize_dead_wood_limiter(); |
|
906 |
||
907 |
if (!_mark_bitmap.initialize(mr)) { |
|
17627
325871034f2c
7186737: Unable to allocate bit maps or card tables for parallel gc for the requested heap
tamao
parents:
17625
diff
changeset
|
908 |
vm_shutdown_during_initialization( |
325871034f2c
7186737: Unable to allocate bit maps or card tables for parallel gc for the requested heap
tamao
parents:
17625
diff
changeset
|
909 |
err_msg("Unable to allocate " SIZE_FORMAT "KB bitmaps for parallel " |
325871034f2c
7186737: Unable to allocate bit maps or card tables for parallel gc for the requested heap
tamao
parents:
17625
diff
changeset
|
910 |
"garbage collection for the requested " SIZE_FORMAT "KB heap.", |
325871034f2c
7186737: Unable to allocate bit maps or card tables for parallel gc for the requested heap
tamao
parents:
17625
diff
changeset
|
911 |
_mark_bitmap.reserved_byte_size()/K, mr.byte_size()/K)); |
1 | 912 |
return false; |
913 |
} |
|
914 |
||
915 |
if (!_summary_data.initialize(mr)) { |
|
17627
325871034f2c
7186737: Unable to allocate bit maps or card tables for parallel gc for the requested heap
tamao
parents:
17625
diff
changeset
|
916 |
vm_shutdown_during_initialization( |
325871034f2c
7186737: Unable to allocate bit maps or card tables for parallel gc for the requested heap
tamao
parents:
17625
diff
changeset
|
917 |
err_msg("Unable to allocate " SIZE_FORMAT "KB card tables for parallel " |
325871034f2c
7186737: Unable to allocate bit maps or card tables for parallel gc for the requested heap
tamao
parents:
17625
diff
changeset
|
918 |
"garbage collection for the requested " SIZE_FORMAT "KB heap.", |
325871034f2c
7186737: Unable to allocate bit maps or card tables for parallel gc for the requested heap
tamao
parents:
17625
diff
changeset
|
919 |
_summary_data.reserved_byte_size()/K, mr.byte_size()/K)); |
1 | 920 |
return false; |
921 |
} |
|
922 |
||
923 |
return true; |
|
924 |
} |
|
925 |
||
926 |
void PSParallelCompact::initialize_space_info() |
|
927 |
{ |
|
928 |
memset(&_space_info, 0, sizeof(_space_info)); |
|
929 |
||
30173
13cf7580b000
8077413: Avoid use of Universe::heap() inside collectors
pliden
parents:
30150
diff
changeset
|
930 |
ParallelScavengeHeap* heap = ParallelScavengeHeap::heap(); |
1 | 931 |
PSYoungGen* young_gen = heap->young_gen(); |
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13195
diff
changeset
|
932 |
|
1 | 933 |
_space_info[old_space_id].set_space(heap->old_gen()->object_space()); |
934 |
_space_info[eden_space_id].set_space(young_gen->eden_space()); |
|
935 |
_space_info[from_space_id].set_space(young_gen->from_space()); |
|
936 |
_space_info[to_space_id].set_space(young_gen->to_space()); |
|
937 |
||
938 |
_space_info[old_space_id].set_start_array(heap->old_gen()->start_array()); |
|
939 |
} |
|
940 |
||
941 |
void PSParallelCompact::initialize_dead_wood_limiter() |
|
942 |
{ |
|
943 |
const size_t max = 100; |
|
944 |
_dwl_mean = double(MIN2(ParallelOldDeadWoodLimiterMean, max)) / 100.0; |
|
945 |
_dwl_std_dev = double(MIN2(ParallelOldDeadWoodLimiterStdDev, max)) / 100.0; |
|
946 |
_dwl_first_term = 1.0 / (sqrt(2.0 * M_PI) * _dwl_std_dev); |
|
947 |
DEBUG_ONLY(_dwl_initialized = true;) |
|
948 |
_dwl_adjustment = normal_distribution(1.0); |
|
949 |
} |
|
950 |
||
951 |
void |
|
952 |
PSParallelCompact::clear_data_covering_space(SpaceId id) |
|
953 |
{ |
|
954 |
// At this point, top is the value before GC, new_top() is the value that will |
|
955 |
// be set at the end of GC. The marking bitmap is cleared to top; nothing |
|
956 |
// should be marked above top. The summary data is cleared to the larger of |
|
957 |
// top & new_top. |
|
958 |
MutableSpace* const space = _space_info[id].space(); |
|
959 |
HeapWord* const bot = space->bottom(); |
|
960 |
HeapWord* const top = space->top(); |
|
961 |
HeapWord* const max_top = MAX2(top, _space_info[id].new_top()); |
|
962 |
||
963 |
const idx_t beg_bit = _mark_bitmap.addr_to_bit(bot); |
|
964 |
const idx_t end_bit = BitMap::word_align_up(_mark_bitmap.addr_to_bit(top)); |
|
965 |
_mark_bitmap.clear_range(beg_bit, end_bit); |
|
966 |
||
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
967 |
const size_t beg_region = _summary_data.addr_to_region_idx(bot); |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
968 |
const size_t end_region = |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
969 |
_summary_data.addr_to_region_idx(_summary_data.region_align_up(max_top)); |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
970 |
_summary_data.clear_range(beg_region, end_region); |
1669
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
971 |
|
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
972 |
// Clear the data used to 'split' regions. |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
973 |
SplitInfo& split_info = _space_info[id].split_info(); |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
974 |
if (split_info.is_valid()) { |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
975 |
split_info.clear(); |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
976 |
} |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
977 |
DEBUG_ONLY(split_info.verify_clear();) |
1 | 978 |
} |
979 |
||
35061 | 980 |
void PSParallelCompact::pre_compact() |
1 | 981 |
{ |
982 |
// Update the from & to space pointers in space_info, since they are swapped |
|
983 |
// at each young gen gc. Do the update unconditionally (even though a |
|
32623
390a27af5657
8134626: Misc cleanups after generation array removal
jwilhelm
parents:
31634
diff
changeset
|
984 |
// promotion failure does not swap spaces) because an unknown number of young |
1 | 985 |
// collections will have swapped the spaces an unknown number of times. |
37146 | 986 |
GCTraceTime(Debug, gc, phases) tm("Pre Compact", &_gc_timer); |
30173
13cf7580b000
8077413: Avoid use of Universe::heap() inside collectors
pliden
parents:
30150
diff
changeset
|
987 |
ParallelScavengeHeap* heap = ParallelScavengeHeap::heap(); |
1 | 988 |
_space_info[from_space_id].set_space(heap->young_gen()->from_space()); |
989 |
_space_info[to_space_id].set_space(heap->young_gen()->to_space()); |
|
990 |
||
991 |
DEBUG_ONLY(add_obj_count = add_obj_size = 0;) |
|
992 |
DEBUG_ONLY(mark_bitmap_count = mark_bitmap_size = 0;) |
|
993 |
||
994 |
// Increment the invocation count |
|
386
7f121b1192f2
6539517: CR 6186200 should be extended to perm gen allocation to prevent spurious OOM's from perm gen
apetrusenko
parents:
1
diff
changeset
|
995 |
heap->increment_total_collections(true); |
1 | 996 |
|
997 |
// We need to track unique mark sweep invocations as well. |
|
998 |
_total_invocations++; |
|
999 |
||
11636
3c07b54482a5
7141200: log some interesting information in ring buffers for crashes
never
parents:
11251
diff
changeset
|
1000 |
heap->print_heap_before_gc(); |
18025 | 1001 |
heap->trace_heap_before_gc(&_gc_tracer); |
1 | 1002 |
|
1003 |
// Fill in TLABs |
|
1004 |
heap->ensure_parsability(true); // retire TLABs |
|
1005 |
||
1006 |
if (VerifyBeforeGC && heap->total_collections() >= VerifyGCStartAt) { |
|
1007 |
HandleMark hm; // Discard invalid handles created during verification |
|
35061 | 1008 |
Universe::verify("Before GC"); |
1 | 1009 |
} |
1010 |
||
1011 |
// Verify object start arrays |
|
1012 |
if (VerifyObjectStartArray && |
|
1013 |
VerifyBeforeGC) { |
|
1014 |
heap->old_gen()->verify_object_start_array(); |
|
1015 |
} |
|
1016 |
||
1017 |
DEBUG_ONLY(mark_bitmap()->verify_clear();) |
|
1018 |
DEBUG_ONLY(summary_data().verify_clear();) |
|
756 | 1019 |
|
35877
a2a62511d0f8
8146987: Improve Parallel GC Full GC by caching results of live_words_in_range()
tschatzl
parents:
35862
diff
changeset
|
1020 |
ParCompactionManager::reset_all_bitmap_query_caches(); |
1 | 1021 |
} |
1022 |
||
1023 |
void PSParallelCompact::post_compact() |
|
1024 |
{ |
|
37146 | 1025 |
GCTraceTime(Info, gc, phases) tm("Post Compact", &_gc_timer); |
1 | 1026 |
|
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13195
diff
changeset
|
1027 |
for (unsigned int id = old_space_id; id < last_space_id; ++id) { |
1669
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
1028 |
// Clear the marking bitmap, summary data and split info. |
1 | 1029 |
clear_data_covering_space(SpaceId(id)); |
1669
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
1030 |
// Update top(). Must be done after clearing the bitmap and summary data. |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
1031 |
_space_info[id].publish_new_top(); |
1 | 1032 |
} |
1033 |
||
1034 |
MutableSpace* const eden_space = _space_info[eden_space_id].space(); |
|
1035 |
MutableSpace* const from_space = _space_info[from_space_id].space(); |
|
1036 |
MutableSpace* const to_space = _space_info[to_space_id].space(); |
|
1037 |
||
30173
13cf7580b000
8077413: Avoid use of Universe::heap() inside collectors
pliden
parents:
30150
diff
changeset
|
1038 |
ParallelScavengeHeap* heap = ParallelScavengeHeap::heap(); |
1 | 1039 |
bool eden_empty = eden_space->is_empty(); |
1040 |
if (!eden_empty) { |
|
1041 |
eden_empty = absorb_live_data_from_eden(heap->size_policy(), |
|
1042 |
heap->young_gen(), heap->old_gen()); |
|
1043 |
} |
|
1044 |
||
1045 |
// Update heap occupancy information which is used as input to the soft ref |
|
1046 |
// clearing policy at the next gc. |
|
1047 |
Universe::update_heap_info_at_gc(); |
|
1048 |
||
1049 |
bool young_gen_empty = eden_empty && from_space->is_empty() && |
|
1050 |
to_space->is_empty(); |
|
1051 |
||
49164
7e958a8ebcd3
8195142: Refactor out card table from CardTableModRefBS to flatten the BarrierSet hierarchy
eosterlund
parents:
49047
diff
changeset
|
1052 |
PSCardTable* ct = heap->card_table(); |
29325 | 1053 |
MemRegion old_mr = heap->old_gen()->reserved(); |
1054 |
if (young_gen_empty) { |
|
49164
7e958a8ebcd3
8195142: Refactor out card table from CardTableModRefBS to flatten the BarrierSet hierarchy
eosterlund
parents:
49047
diff
changeset
|
1055 |
ct->clear(MemRegion(old_mr.start(), old_mr.end())); |
29325 | 1056 |
} else { |
49164
7e958a8ebcd3
8195142: Refactor out card table from CardTableModRefBS to flatten the BarrierSet hierarchy
eosterlund
parents:
49047
diff
changeset
|
1057 |
ct->invalidate(MemRegion(old_mr.start(), old_mr.end())); |
1 | 1058 |
} |
1059 |
||
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13195
diff
changeset
|
1060 |
// Delete metaspaces for unloaded class loaders and clean up loader_data graph |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13195
diff
changeset
|
1061 |
ClassLoaderDataGraph::purge(); |
49389
9ef2eee8ca7c
8199430: Rename MetaspaceAux to something more meaningful
stuefe
parents:
49361
diff
changeset
|
1062 |
MetaspaceUtils::verify_metrics(); |
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13195
diff
changeset
|
1063 |
|
54178 | 1064 |
heap->prune_scavengable_nmethods(); |
1 | 1065 |
|
47799 | 1066 |
#if COMPILER2_OR_JVMCI |
33160
c59f1676d27e
8136421: JEP 243: Java-Level JVM Compiler Interface
twisti
parents:
32623
diff
changeset
|
1067 |
DerivedPointerTable::update_pointers(); |
c59f1676d27e
8136421: JEP 243: Java-Level JVM Compiler Interface
twisti
parents:
32623
diff
changeset
|
1068 |
#endif |
1 | 1069 |
|
971
f0b20be4165d
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
756
diff
changeset
|
1070 |
if (ZapUnusedHeapArea) { |
f0b20be4165d
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
756
diff
changeset
|
1071 |
heap->gen_mangle_unused_area(); |
f0b20be4165d
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
756
diff
changeset
|
1072 |
} |
f0b20be4165d
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
756
diff
changeset
|
1073 |
|
1 | 1074 |
// Update time of last GC |
1075 |
reset_millis_since_last_gc(); |
|
1076 |
} |
|
1077 |
||
1078 |
HeapWord* |
|
1079 |
PSParallelCompact::compute_dense_prefix_via_density(const SpaceId id, |
|
1080 |
bool maximum_compaction) |
|
1081 |
{ |
|
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
1082 |
const size_t region_size = ParallelCompactData::RegionSize; |
1 | 1083 |
const ParallelCompactData& sd = summary_data(); |
1084 |
||
1085 |
const MutableSpace* const space = _space_info[id].space(); |
|
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
1086 |
HeapWord* const top_aligned_up = sd.region_align_up(space->top()); |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
1087 |
const RegionData* const beg_cp = sd.addr_to_region_ptr(space->bottom()); |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
1088 |
const RegionData* const end_cp = sd.addr_to_region_ptr(top_aligned_up); |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
1089 |
|
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
1090 |
// Skip full regions at the beginning of the space--they are necessarily part |
1 | 1091 |
// of the dense prefix. |
1092 |
size_t full_count = 0; |
|
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
1093 |
const RegionData* cp; |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
1094 |
for (cp = beg_cp; cp < end_cp && cp->data_size() == region_size; ++cp) { |
1 | 1095 |
++full_count; |
1096 |
} |
|
1097 |
||
1098 |
assert(total_invocations() >= _maximum_compaction_gc_num, "sanity"); |
|
1099 |
const size_t gcs_since_max = total_invocations() - _maximum_compaction_gc_num; |
|
1100 |
const bool interval_ended = gcs_since_max > HeapMaximumCompactionInterval; |
|
1101 |
if (maximum_compaction || cp == end_cp || interval_ended) { |
|
1102 |
_maximum_compaction_gc_num = total_invocations(); |
|
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
1103 |
return sd.region_to_addr(cp); |
1 | 1104 |
} |
1105 |
||
1106 |
HeapWord* const new_top = _space_info[id].new_top(); |
|
1107 |
const size_t space_live = pointer_delta(new_top, space->bottom()); |
|
1108 |
const size_t space_used = space->used_in_words(); |
|
1109 |
const size_t space_capacity = space->capacity_in_words(); |
|
1110 |
||
1111 |
const double cur_density = double(space_live) / space_capacity; |
|
1112 |
const double deadwood_density = |
|
1113 |
(1.0 - cur_density) * (1.0 - cur_density) * cur_density * cur_density; |
|
1114 |
const size_t deadwood_goal = size_t(space_capacity * deadwood_density); |
|
1115 |
||
1116 |
if (TraceParallelOldGCDensePrefix) { |
|
1117 |
tty->print_cr("cur_dens=%5.3f dw_dens=%5.3f dw_goal=" SIZE_FORMAT, |
|
1118 |
cur_density, deadwood_density, deadwood_goal); |
|
1119 |
tty->print_cr("space_live=" SIZE_FORMAT " " "space_used=" SIZE_FORMAT " " |
|
1120 |
"space_cap=" SIZE_FORMAT, |
|
1121 |
space_live, space_used, |
|
1122 |
space_capacity); |
|
1123 |
} |
|
1124 |
||
1125 |
// XXX - Use binary search? |
|
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
1126 |
HeapWord* dense_prefix = sd.region_to_addr(cp); |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
1127 |
const RegionData* full_cp = cp; |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
1128 |
const RegionData* const top_cp = sd.addr_to_region_ptr(space->top() - 1); |
1 | 1129 |
while (cp < end_cp) { |
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
1130 |
HeapWord* region_destination = cp->destination(); |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
1131 |
const size_t cur_deadwood = pointer_delta(dense_prefix, region_destination); |
1 | 1132 |
if (TraceParallelOldGCDensePrefix && Verbose) { |
972
b86fd2f84aaf
6718283: existing uses of *_FORMAT_W() were broken by 6521491
jcoomes
parents:
971
diff
changeset
|
1133 |
tty->print_cr("c#=" SIZE_FORMAT_W(4) " dst=" PTR_FORMAT " " |
29798
451c73fdf690
8076071: parallelScavenge: PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC needs to be removed from source files
david
parents:
29792
diff
changeset
|
1134 |
"dp=" PTR_FORMAT " " "cdw=" SIZE_FORMAT_W(8), |
451c73fdf690
8076071: parallelScavenge: PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC needs to be removed from source files
david
parents:
29792
diff
changeset
|
1135 |
sd.region(cp), p2i(region_destination), |
451c73fdf690
8076071: parallelScavenge: PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC needs to be removed from source files
david
parents:
29792
diff
changeset
|
1136 |
p2i(dense_prefix), cur_deadwood); |
1 | 1137 |
} |
1138 |
||
1139 |
if (cur_deadwood >= deadwood_goal) { |
|
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
1140 |
// Found the region that has the correct amount of deadwood to the left. |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
1141 |
// This typically occurs after crossing a fairly sparse set of regions, so |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
1142 |
// iterate backwards over those sparse regions, looking for the region |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
1143 |
// that has the lowest density of live objects 'to the right.' |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
1144 |
size_t space_to_left = sd.region(cp) * region_size; |
1 | 1145 |
size_t live_to_left = space_to_left - cur_deadwood; |
1146 |
size_t space_to_right = space_capacity - space_to_left; |
|
1147 |
size_t live_to_right = space_live - live_to_left; |
|
1148 |
double density_to_right = double(live_to_right) / space_to_right; |
|
1149 |
while (cp > full_cp) { |
|
1150 |
--cp; |
|
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
1151 |
const size_t prev_region_live_to_right = live_to_right - |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
1152 |
cp->data_size(); |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
1153 |
const size_t prev_region_space_to_right = space_to_right + region_size; |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
1154 |
double prev_region_density_to_right = |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
1155 |
double(prev_region_live_to_right) / prev_region_space_to_right; |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
1156 |
if (density_to_right <= prev_region_density_to_right) { |
1 | 1157 |
return dense_prefix; |
1158 |
} |
|
1159 |
if (TraceParallelOldGCDensePrefix && Verbose) { |
|
972
b86fd2f84aaf
6718283: existing uses of *_FORMAT_W() were broken by 6521491
jcoomes
parents:
971
diff
changeset
|
1160 |
tty->print_cr("backing up from c=" SIZE_FORMAT_W(4) " d2r=%10.8f " |
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
1161 |
"pc_d2r=%10.8f", sd.region(cp), density_to_right, |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
1162 |
prev_region_density_to_right); |
1 | 1163 |
} |
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
1164 |
dense_prefix -= region_size; |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
1165 |
live_to_right = prev_region_live_to_right; |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
1166 |
space_to_right = prev_region_space_to_right; |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
1167 |
density_to_right = prev_region_density_to_right; |
1 | 1168 |
} |
1169 |
return dense_prefix; |
|
1170 |
} |
|
1171 |
||
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
1172 |
dense_prefix += region_size; |
1 | 1173 |
++cp; |
1174 |
} |
|
1175 |
||
1176 |
return dense_prefix; |
|
1177 |
} |
|
1178 |
||
1179 |
#ifndef PRODUCT |
|
1180 |
void PSParallelCompact::print_dense_prefix_stats(const char* const algorithm, |
|
1181 |
const SpaceId id, |
|
1182 |
const bool maximum_compaction, |
|
1183 |
HeapWord* const addr) |
|
1184 |
{ |
|
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
1185 |
const size_t region_idx = summary_data().addr_to_region_idx(addr); |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
1186 |
RegionData* const cp = summary_data().region(region_idx); |
1 | 1187 |
const MutableSpace* const space = _space_info[id].space(); |
1188 |
HeapWord* const new_top = _space_info[id].new_top(); |
|
1189 |
||
1190 |
const size_t space_live = pointer_delta(new_top, space->bottom()); |
|
1191 |
const size_t dead_to_left = pointer_delta(addr, cp->destination()); |
|
1192 |
const size_t space_cap = space->capacity_in_words(); |
|
1193 |
const double dead_to_left_pct = double(dead_to_left) / space_cap; |
|
1194 |
const size_t live_to_right = new_top - cp->destination(); |
|
1195 |
const size_t dead_to_right = space->top() - addr - live_to_right; |
|
1196 |
||
972
b86fd2f84aaf
6718283: existing uses of *_FORMAT_W() were broken by 6521491
jcoomes
parents:
971
diff
changeset
|
1197 |
tty->print_cr("%s=" PTR_FORMAT " dpc=" SIZE_FORMAT_W(5) " " |
1 | 1198 |
"spl=" SIZE_FORMAT " " |
1199 |
"d2l=" SIZE_FORMAT " d2l%%=%6.4f " |
|
1200 |
"d2r=" SIZE_FORMAT " l2r=" SIZE_FORMAT |
|
1201 |
" ratio=%10.8f", |
|
29798
451c73fdf690
8076071: parallelScavenge: PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC needs to be removed from source files
david
parents:
29792
diff
changeset
|
1202 |
algorithm, p2i(addr), region_idx, |
1 | 1203 |
space_live, |
1204 |
dead_to_left, dead_to_left_pct, |
|
1205 |
dead_to_right, live_to_right, |
|
1206 |
double(dead_to_right) / live_to_right); |
|
1207 |
} |
|
1208 |
#endif // #ifndef PRODUCT |
|
1209 |
||
1210 |
// Return a fraction indicating how much of the generation can be treated as |
|
1211 |
// "dead wood" (i.e., not reclaimed). The function uses a normal distribution |
|
1212 |
// based on the density of live objects in the generation to determine a limit, |
|
1213 |
// which is then adjusted so the return value is min_percent when the density is |
|
1214 |
// 1. |
|
1215 |
// |
|
1216 |
// The following table shows some return values for a different values of the |
|
1217 |
// standard deviation (ParallelOldDeadWoodLimiterStdDev); the mean is 0.5 and |
|
1218 |
// min_percent is 1. |
|
1219 |
// |
|
1220 |
// fraction allowed as dead wood |
|
1221 |
// ----------------------------------------------------------------- |
|
1222 |
// density std_dev=70 std_dev=75 std_dev=80 std_dev=85 std_dev=90 std_dev=95 |
|
1223 |
// ------- ---------- ---------- ---------- ---------- ---------- ---------- |
|
1224 |
// 0.00000 0.01000000 0.01000000 0.01000000 0.01000000 0.01000000 0.01000000 |
|
1225 |
// 0.05000 0.03193096 0.02836880 0.02550828 0.02319280 0.02130337 0.01974941 |
|
1226 |
// 0.10000 0.05247504 0.04547452 0.03988045 0.03537016 0.03170171 0.02869272 |
|
1227 |
// 0.15000 0.07135702 0.06111390 0.05296419 0.04641639 0.04110601 0.03676066 |
|
1228 |
// 0.20000 0.08831616 0.07509618 0.06461766 0.05622444 0.04943437 0.04388975 |
|
1229 |
// 0.25000 0.10311208 0.08724696 0.07471205 0.06469760 0.05661313 0.05002313 |
|
1230 |
// 0.30000 0.11553050 0.09741183 0.08313394 0.07175114 0.06257797 0.05511132 |
|
1231 |
// 0.35000 0.12538832 0.10545958 0.08978741 0.07731366 0.06727491 0.05911289 |
|
1232 |
// 0.40000 0.13253818 0.11128511 0.09459590 0.08132834 0.07066107 0.06199500 |
|
1233 |
// 0.45000 0.13687208 0.11481163 0.09750361 0.08375387 0.07270534 0.06373386 |
|
1234 |
// 0.50000 0.13832410 0.11599237 0.09847664 0.08456518 0.07338887 0.06431510 |
|
1235 |
// 0.55000 0.13687208 0.11481163 0.09750361 0.08375387 0.07270534 0.06373386 |
|
1236 |
// 0.60000 0.13253818 0.11128511 0.09459590 0.08132834 0.07066107 0.06199500 |
|
1237 |
// 0.65000 0.12538832 0.10545958 0.08978741 0.07731366 0.06727491 0.05911289 |
|
1238 |
// 0.70000 0.11553050 0.09741183 0.08313394 0.07175114 0.06257797 0.05511132 |
|
1239 |
// 0.75000 0.10311208 0.08724696 0.07471205 0.06469760 0.05661313 0.05002313 |
|
1240 |
// 0.80000 0.08831616 0.07509618 0.06461766 0.05622444 0.04943437 0.04388975 |
|
1241 |
// 0.85000 0.07135702 0.06111390 0.05296419 0.04641639 0.04110601 0.03676066 |
|
1242 |
// 0.90000 0.05247504 0.04547452 0.03988045 0.03537016 0.03170171 0.02869272 |
|
1243 |
// 0.95000 0.03193096 0.02836880 0.02550828 0.02319280 0.02130337 0.01974941 |
|
1244 |
// 1.00000 0.01000000 0.01000000 0.01000000 0.01000000 0.01000000 0.01000000 |
|
1245 |
||
1246 |
double PSParallelCompact::dead_wood_limiter(double density, size_t min_percent) |
|
1247 |
{ |
|
1248 |
assert(_dwl_initialized, "uninitialized"); |
|
1249 |
||
1250 |
// The raw limit is the value of the normal distribution at x = density. |
|
1251 |
const double raw_limit = normal_distribution(density); |
|
1252 |
||
1253 |
// Adjust the raw limit so it becomes the minimum when the density is 1. |
|
1254 |
// |
|
1255 |
// First subtract the adjustment value (which is simply the precomputed value |
|
1256 |
// normal_distribution(1.0)); this yields a value of 0 when the density is 1. |
|
1257 |
// Then add the minimum value, so the minimum is returned when the density is |
|
1258 |
// 1. Finally, prevent negative values, which occur when the mean is not 0.5. |
|
1259 |
const double min = double(min_percent) / 100.0; |
|
1260 |
const double limit = raw_limit - _dwl_adjustment + min; |
|
1261 |
return MAX2(limit, 0.0); |
|
1262 |
} |
|
1263 |
||
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
1264 |
ParallelCompactData::RegionData* |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
1265 |
PSParallelCompact::first_dead_space_region(const RegionData* beg, |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
1266 |
const RegionData* end) |
1 | 1267 |
{ |
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
1268 |
const size_t region_size = ParallelCompactData::RegionSize; |
1 | 1269 |
ParallelCompactData& sd = summary_data(); |
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
1270 |
size_t left = sd.region(beg); |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
1271 |
size_t right = end > beg ? sd.region(end) - 1 : left; |
1 | 1272 |
|
1273 |
// Binary search. |
|
1274 |
while (left < right) { |
|
1275 |
// Equivalent to (left + right) / 2, but does not overflow. |
|
1276 |
const size_t middle = left + (right - left) / 2; |
|
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
1277 |
RegionData* const middle_ptr = sd.region(middle); |
1 | 1278 |
HeapWord* const dest = middle_ptr->destination(); |
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
1279 |
HeapWord* const addr = sd.region_to_addr(middle); |
1 | 1280 |
assert(dest != NULL, "sanity"); |
1281 |
assert(dest <= addr, "must move left"); |
|
1282 |
||
1283 |
if (middle > left && dest < addr) { |
|
1284 |
right = middle - 1; |
|
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
1285 |
} else if (middle < right && middle_ptr->data_size() == region_size) { |
1 | 1286 |
left = middle + 1; |
1287 |
} else { |
|
1288 |
return middle_ptr; |
|
1289 |
} |
|
1290 |
} |
|
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
1291 |
return sd.region(left); |
1 | 1292 |
} |
1293 |
||
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
1294 |
ParallelCompactData::RegionData* |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
1295 |
PSParallelCompact::dead_wood_limit_region(const RegionData* beg, |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
1296 |
const RegionData* end, |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
1297 |
size_t dead_words) |
1 | 1298 |
{ |
1299 |
ParallelCompactData& sd = summary_data(); |
|
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
1300 |
size_t left = sd.region(beg); |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
1301 |
size_t right = end > beg ? sd.region(end) - 1 : left; |
1 | 1302 |
|
1303 |
// Binary search. |
|
1304 |
while (left < right) { |
|
1305 |
// Equivalent to (left + right) / 2, but does not overflow. |
|
1306 |
const size_t middle = left + (right - left) / 2; |
|
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
1307 |
RegionData* const middle_ptr = sd.region(middle); |
1 | 1308 |
HeapWord* const dest = middle_ptr->destination(); |
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
1309 |
HeapWord* const addr = sd.region_to_addr(middle); |
1 | 1310 |
assert(dest != NULL, "sanity"); |
1311 |
assert(dest <= addr, "must move left"); |
|
1312 |
||
1313 |
const size_t dead_to_left = pointer_delta(addr, dest); |
|
1314 |
if (middle > left && dead_to_left > dead_words) { |
|
1315 |
right = middle - 1; |
|
1316 |
} else if (middle < right && dead_to_left < dead_words) { |
|
1317 |
left = middle + 1; |
|
1318 |
} else { |
|
1319 |
return middle_ptr; |
|
1320 |
} |
|
1321 |
} |
|
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
1322 |
return sd.region(left); |
1 | 1323 |
} |
1324 |
||
1325 |
// The result is valid during the summary phase, after the initial summarization |
|
1326 |
// of each space into itself, and before final summarization. |
|
1327 |
inline double |
|
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
1328 |
PSParallelCompact::reclaimed_ratio(const RegionData* const cp, |
1 | 1329 |
HeapWord* const bottom, |
1330 |
HeapWord* const top, |
|
1331 |
HeapWord* const new_top) |
|
1332 |
{ |
|
1333 |
ParallelCompactData& sd = summary_data(); |
|
1334 |
||
1335 |
assert(cp != NULL, "sanity"); |
|
1336 |
assert(bottom != NULL, "sanity"); |
|
1337 |
assert(top != NULL, "sanity"); |
|
1338 |
assert(new_top != NULL, "sanity"); |
|
1339 |
assert(top >= new_top, "summary data problem?"); |
|
1340 |
assert(new_top > bottom, "space is empty; should not be here"); |
|
1341 |
assert(new_top >= cp->destination(), "sanity"); |
|
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
1342 |
assert(top >= sd.region_to_addr(cp), "sanity"); |
1 | 1343 |
|
1344 |
HeapWord* const destination = cp->destination(); |
|
1345 |
const size_t dense_prefix_live = pointer_delta(destination, bottom); |
|
1346 |
const size_t compacted_region_live = pointer_delta(new_top, destination); |
|
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
1347 |
const size_t compacted_region_used = pointer_delta(top, |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
1348 |
sd.region_to_addr(cp)); |
1 | 1349 |
const size_t reclaimable = compacted_region_used - compacted_region_live; |
1350 |
||
1351 |
const double divisor = dense_prefix_live + 1.25 * compacted_region_live; |
|
1352 |
return double(reclaimable) / divisor; |
|
1353 |
} |
|
1354 |
||
1355 |
// Return the address of the end of the dense prefix, a.k.a. the start of the |
|
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
1356 |
// compacted region. The address is always on a region boundary. |
1 | 1357 |
// |
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
1358 |
// Completely full regions at the left are skipped, since no compaction can |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
1359 |
// occur in those regions. Then the maximum amount of dead wood to allow is |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
1360 |
// computed, based on the density (amount live / capacity) of the generation; |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
1361 |
// the region with approximately that amount of dead space to the left is |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
1362 |
// identified as the limit region. Regions between the last completely full |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
1363 |
// region and the limit region are scanned and the one that has the best |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
1364 |
// (maximum) reclaimed_ratio() is selected. |
1 | 1365 |
HeapWord* |
1366 |
PSParallelCompact::compute_dense_prefix(const SpaceId id, |
|
1367 |
bool maximum_compaction) |
|
1368 |
{ |
|
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
1369 |
const size_t region_size = ParallelCompactData::RegionSize; |
1 | 1370 |
const ParallelCompactData& sd = summary_data(); |
1371 |
||
1372 |
const MutableSpace* const space = _space_info[id].space(); |
|
1373 |
HeapWord* const top = space->top(); |
|
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
1374 |
HeapWord* const top_aligned_up = sd.region_align_up(top); |
1 | 1375 |
HeapWord* const new_top = _space_info[id].new_top(); |
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
1376 |
HeapWord* const new_top_aligned_up = sd.region_align_up(new_top); |
1 | 1377 |
HeapWord* const bottom = space->bottom(); |
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
1378 |
const RegionData* const beg_cp = sd.addr_to_region_ptr(bottom); |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
1379 |
const RegionData* const top_cp = sd.addr_to_region_ptr(top_aligned_up); |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
1380 |
const RegionData* const new_top_cp = |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
1381 |
sd.addr_to_region_ptr(new_top_aligned_up); |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
1382 |
|
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
1383 |
// Skip full regions at the beginning of the space--they are necessarily part |
1 | 1384 |
// of the dense prefix. |
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
1385 |
const RegionData* const full_cp = first_dead_space_region(beg_cp, new_top_cp); |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
1386 |
assert(full_cp->destination() == sd.region_to_addr(full_cp) || |
1 | 1387 |
space->is_empty(), "no dead space allowed to the left"); |
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
1388 |
assert(full_cp->data_size() < region_size || full_cp == new_top_cp - 1, |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
1389 |
"region must have dead space"); |
1 | 1390 |
|
1391 |
// The gc number is saved whenever a maximum compaction is done, and used to |
|
1392 |
// determine when the maximum compaction interval has expired. This avoids |
|
1393 |
// successive max compactions for different reasons. |
|
1394 |
assert(total_invocations() >= _maximum_compaction_gc_num, "sanity"); |
|
1395 |
const size_t gcs_since_max = total_invocations() - _maximum_compaction_gc_num; |
|
1396 |
const bool interval_ended = gcs_since_max > HeapMaximumCompactionInterval || |
|
1397 |
total_invocations() == HeapFirstMaximumCompactionCount; |
|
1398 |
if (maximum_compaction || full_cp == top_cp || interval_ended) { |
|
1399 |
_maximum_compaction_gc_num = total_invocations(); |
|
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
1400 |
return sd.region_to_addr(full_cp); |
1 | 1401 |
} |
1402 |
||
1403 |
const size_t space_live = pointer_delta(new_top, bottom); |
|
1404 |
const size_t space_used = space->used_in_words(); |
|
1405 |
const size_t space_capacity = space->capacity_in_words(); |
|
1406 |
||
1407 |
const double density = double(space_live) / double(space_capacity); |
|
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13195
diff
changeset
|
1408 |
const size_t min_percent_free = MarkSweepDeadRatio; |
1 | 1409 |
const double limiter = dead_wood_limiter(density, min_percent_free); |
1410 |
const size_t dead_wood_max = space_used - space_live; |
|
1411 |
const size_t dead_wood_limit = MIN2(size_t(space_capacity * limiter), |
|
1412 |
dead_wood_max); |
|
1413 |
||
1414 |
if (TraceParallelOldGCDensePrefix) { |
|
1415 |
tty->print_cr("space_live=" SIZE_FORMAT " " "space_used=" SIZE_FORMAT " " |
|
1416 |
"space_cap=" SIZE_FORMAT, |
|
1417 |
space_live, space_used, |
|
1418 |
space_capacity); |
|
24092
e274d864545a
8039743: Use correct format specifier to print size_t values and pointers in the GC code
stefank
parents:
23854
diff
changeset
|
1419 |
tty->print_cr("dead_wood_limiter(%6.4f, " SIZE_FORMAT ")=%6.4f " |
1 | 1420 |
"dead_wood_max=" SIZE_FORMAT " dead_wood_limit=" SIZE_FORMAT, |
1421 |
density, min_percent_free, limiter, |
|
1422 |
dead_wood_max, dead_wood_limit); |
|
1423 |
} |
|
1424 |
||
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
1425 |
// Locate the region with the desired amount of dead space to the left. |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
1426 |
const RegionData* const limit_cp = |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
1427 |
dead_wood_limit_region(full_cp, top_cp, dead_wood_limit); |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
1428 |
|
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
1429 |
// Scan from the first region with dead space to the limit region and find the |
1 | 1430 |
// one with the best (largest) reclaimed ratio. |
1431 |
double best_ratio = 0.0; |
|
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
1432 |
const RegionData* best_cp = full_cp; |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
1433 |
for (const RegionData* cp = full_cp; cp < limit_cp; ++cp) { |
1 | 1434 |
double tmp_ratio = reclaimed_ratio(cp, bottom, top, new_top); |
1435 |
if (tmp_ratio > best_ratio) { |
|
1436 |
best_cp = cp; |
|
1437 |
best_ratio = tmp_ratio; |
|
1438 |
} |
|
1439 |
} |
|
1440 |
||
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
1441 |
return sd.region_to_addr(best_cp); |
1 | 1442 |
} |
1443 |
||
1444 |
void PSParallelCompact::summarize_spaces_quick() |
|
1445 |
{ |
|
1446 |
for (unsigned int i = 0; i < last_space_id; ++i) { |
|
1447 |
const MutableSpace* space = _space_info[i].space(); |
|
1669
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
1448 |
HeapWord** nta = _space_info[i].new_top_addr(); |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
1449 |
bool result = _summary_data.summarize(_space_info[i].split_info(), |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
1450 |
space->bottom(), space->top(), NULL, |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
1451 |
space->bottom(), space->end(), nta); |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
1452 |
assert(result, "space must fit into itself"); |
1 | 1453 |
_space_info[i].set_dense_prefix(space->bottom()); |
1454 |
} |
|
1455 |
} |
|
1456 |
||
1457 |
void PSParallelCompact::fill_dense_prefix_end(SpaceId id) |
|
1458 |
{ |
|
1459 |
HeapWord* const dense_prefix_end = dense_prefix(id); |
|
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
1460 |
const RegionData* region = _summary_data.addr_to_region_ptr(dense_prefix_end); |
1 | 1461 |
const idx_t dense_prefix_bit = _mark_bitmap.addr_to_bit(dense_prefix_end); |
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
1462 |
if (dead_space_crosses_boundary(region, dense_prefix_bit)) { |
1 | 1463 |
// Only enough dead space is filled so that any remaining dead space to the |
1464 |
// left is larger than the minimum filler object. (The remainder is filled |
|
1465 |
// during the copy/update phase.) |
|
1466 |
// |
|
1467 |
// The size of the dead space to the right of the boundary is not a |
|
1468 |
// concern, since compaction will be able to use whatever space is |
|
1469 |
// available. |
|
1470 |
// |
|
1471 |
// Here '||' is the boundary, 'x' represents a don't care bit and a box |
|
1472 |
// surrounds the space to be filled with an object. |
|
1473 |
// |
|
1474 |
// In the 32-bit VM, each bit represents two 32-bit words: |
|
1475 |
// +---+ |
|
1476 |
// a) beg_bits: ... x x x | 0 | || 0 x x ... |
|
1477 |
// end_bits: ... x x x | 0 | || 0 x x ... |
|
1478 |
// +---+ |
|
1479 |
// |
|
1480 |
// In the 64-bit VM, each bit represents one 64-bit word: |
|
1481 |
// +------------+ |
|
1482 |
// b) beg_bits: ... x x x | 0 || 0 | x x ... |
|
1483 |
// end_bits: ... x x 1 | 0 || 0 | x x ... |
|
1484 |
// +------------+ |
|
1485 |
// +-------+ |
|
1486 |
// c) beg_bits: ... x x | 0 0 | || 0 x x ... |
|
1487 |
// end_bits: ... x 1 | 0 0 | || 0 x x ... |
|
1488 |
// +-------+ |
|
1489 |
// +-----------+ |
|
1490 |
// d) beg_bits: ... x | 0 0 0 | || 0 x x ... |
|
1491 |
// end_bits: ... 1 | 0 0 0 | || 0 x x ... |
|
1492 |
// +-----------+ |
|
1493 |
// +-------+ |
|
1494 |
// e) beg_bits: ... 0 0 | 0 0 | || 0 x x ... |
|
1495 |
// end_bits: ... 0 0 | 0 0 | || 0 x x ... |
|
1496 |
// +-------+ |
|
1497 |
||
1498 |
// Initially assume case a, c or e will apply. |
|
5694
1e0532a6abff
6916623: Align object to 16 bytes to use Compressed Oops with java heap up to 64Gb
kvn
parents:
5402
diff
changeset
|
1499 |
size_t obj_len = CollectedHeap::min_fill_size(); |
1 | 1500 |
HeapWord* obj_beg = dense_prefix_end - obj_len; |
1501 |
||
1502 |
#ifdef _LP64 |
|
5694
1e0532a6abff
6916623: Align object to 16 bytes to use Compressed Oops with java heap up to 64Gb
kvn
parents:
5402
diff
changeset
|
1503 |
if (MinObjAlignment > 1) { // object alignment > heap word size |
1e0532a6abff
6916623: Align object to 16 bytes to use Compressed Oops with java heap up to 64Gb
kvn
parents:
5402
diff
changeset
|
1504 |
// Cases a, c or e. |
1e0532a6abff
6916623: Align object to 16 bytes to use Compressed Oops with java heap up to 64Gb
kvn
parents:
5402
diff
changeset
|
1505 |
} else if (_mark_bitmap.is_obj_end(dense_prefix_bit - 2)) { |
1 | 1506 |
// Case b above. |
1507 |
obj_beg = dense_prefix_end - 1; |
|
1508 |
} else if (!_mark_bitmap.is_obj_end(dense_prefix_bit - 3) && |
|
1509 |
_mark_bitmap.is_obj_end(dense_prefix_bit - 4)) { |
|
1510 |
// Case d above. |
|
1511 |
obj_beg = dense_prefix_end - 3; |
|
1512 |
obj_len = 3; |
|
1513 |
} |
|
1514 |
#endif // #ifdef _LP64 |
|
1515 |
||
1669
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
1516 |
CollectedHeap::fill_with_object(obj_beg, obj_len); |
1 | 1517 |
_mark_bitmap.mark_obj(obj_beg, obj_len); |
1518 |
_summary_data.add_obj(obj_beg, obj_len); |
|
1519 |
assert(start_array(id) != NULL, "sanity"); |
|
1520 |
start_array(id)->allocate_block(obj_beg); |
|
1521 |
} |
|
1522 |
} |
|
1523 |
||
1524 |
void |
|
1525 |
PSParallelCompact::summarize_space(SpaceId id, bool maximum_compaction) |
|
1526 |
{ |
|
1527 |
assert(id < last_space_id, "id out of range"); |
|
33227
b00ec45f8c2c
8139277: Remove ScavengeWithObjectsInToSpace, ParallelOldGCSplitALot, ParallelOldGCSplitInterval, PSAdjustTenuredGenForMinorPause and PSAdjustYoungGenForMajorPause
david
parents:
33107
diff
changeset
|
1528 |
assert(_space_info[id].dense_prefix() == _space_info[id].space()->bottom(), |
1670
0deb85ea62d5
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
1669
diff
changeset
|
1529 |
"should have been reset in summarize_spaces_quick()"); |
1 | 1530 |
|
1531 |
const MutableSpace* space = _space_info[id].space(); |
|
973
f00c7826d8c6
6483129: par compact assertion failure (new_top > bottom)
jcoomes
parents:
972
diff
changeset
|
1532 |
if (_space_info[id].new_top() != space->bottom()) { |
f00c7826d8c6
6483129: par compact assertion failure (new_top > bottom)
jcoomes
parents:
972
diff
changeset
|
1533 |
HeapWord* dense_prefix_end = compute_dense_prefix(id, maximum_compaction); |
f00c7826d8c6
6483129: par compact assertion failure (new_top > bottom)
jcoomes
parents:
972
diff
changeset
|
1534 |
_space_info[id].set_dense_prefix(dense_prefix_end); |
1 | 1535 |
|
1536 |
#ifndef PRODUCT |
|
973
f00c7826d8c6
6483129: par compact assertion failure (new_top > bottom)
jcoomes
parents:
972
diff
changeset
|
1537 |
if (TraceParallelOldGCDensePrefix) { |
f00c7826d8c6
6483129: par compact assertion failure (new_top > bottom)
jcoomes
parents:
972
diff
changeset
|
1538 |
print_dense_prefix_stats("ratio", id, maximum_compaction, |
f00c7826d8c6
6483129: par compact assertion failure (new_top > bottom)
jcoomes
parents:
972
diff
changeset
|
1539 |
dense_prefix_end); |
f00c7826d8c6
6483129: par compact assertion failure (new_top > bottom)
jcoomes
parents:
972
diff
changeset
|
1540 |
HeapWord* addr = compute_dense_prefix_via_density(id, maximum_compaction); |
f00c7826d8c6
6483129: par compact assertion failure (new_top > bottom)
jcoomes
parents:
972
diff
changeset
|
1541 |
print_dense_prefix_stats("density", id, maximum_compaction, addr); |
f00c7826d8c6
6483129: par compact assertion failure (new_top > bottom)
jcoomes
parents:
972
diff
changeset
|
1542 |
} |
1 | 1543 |
#endif // #ifndef PRODUCT |
1544 |
||
1670
0deb85ea62d5
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
1669
diff
changeset
|
1545 |
// Recompute the summary data, taking into account the dense prefix. If |
0deb85ea62d5
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
1669
diff
changeset
|
1546 |
// every last byte will be reclaimed, then the existing summary data which |
0deb85ea62d5
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
1669
diff
changeset
|
1547 |
// compacts everything can be left in place. |
973
f00c7826d8c6
6483129: par compact assertion failure (new_top > bottom)
jcoomes
parents:
972
diff
changeset
|
1548 |
if (!maximum_compaction && dense_prefix_end != space->bottom()) { |
1669
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
1549 |
// If dead space crosses the dense prefix boundary, it is (at least |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
1550 |
// partially) filled with a dummy object, marked live and added to the |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
1551 |
// summary data. This simplifies the copy/update phase and must be done |
1670
0deb85ea62d5
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
1669
diff
changeset
|
1552 |
// before the final locations of objects are determined, to prevent |
0deb85ea62d5
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
1669
diff
changeset
|
1553 |
// leaving a fragment of dead space that is too small to fill. |
973
f00c7826d8c6
6483129: par compact assertion failure (new_top > bottom)
jcoomes
parents:
972
diff
changeset
|
1554 |
fill_dense_prefix_end(id); |
1669
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
1555 |
|
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
1556 |
// Compute the destination of each Region, and thus each object. |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
1557 |
_summary_data.summarize_dense_prefix(space->bottom(), dense_prefix_end); |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
1558 |
_summary_data.summarize(_space_info[id].split_info(), |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
1559 |
dense_prefix_end, space->top(), NULL, |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
1560 |
dense_prefix_end, space->end(), |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
1561 |
_space_info[id].new_top_addr()); |
973
f00c7826d8c6
6483129: par compact assertion failure (new_top > bottom)
jcoomes
parents:
972
diff
changeset
|
1562 |
} |
1 | 1563 |
} |
1564 |
||
37146 | 1565 |
if (log_develop_is_enabled(Trace, gc, compaction)) { |
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
1566 |
const size_t region_size = ParallelCompactData::RegionSize; |
973
f00c7826d8c6
6483129: par compact assertion failure (new_top > bottom)
jcoomes
parents:
972
diff
changeset
|
1567 |
HeapWord* const dense_prefix_end = _space_info[id].dense_prefix(); |
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
1568 |
const size_t dp_region = _summary_data.addr_to_region_idx(dense_prefix_end); |
1 | 1569 |
const size_t dp_words = pointer_delta(dense_prefix_end, space->bottom()); |
973
f00c7826d8c6
6483129: par compact assertion failure (new_top > bottom)
jcoomes
parents:
972
diff
changeset
|
1570 |
HeapWord* const new_top = _space_info[id].new_top(); |
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
1571 |
const HeapWord* nt_aligned_up = _summary_data.region_align_up(new_top); |
1 | 1572 |
const size_t cr_words = pointer_delta(nt_aligned_up, dense_prefix_end); |
37146 | 1573 |
log_develop_trace(gc, compaction)( |
35061 | 1574 |
"id=%d cap=" SIZE_FORMAT " dp=" PTR_FORMAT " " |
1575 |
"dp_region=" SIZE_FORMAT " " "dp_count=" SIZE_FORMAT " " |
|
1576 |
"cr_count=" SIZE_FORMAT " " "nt=" PTR_FORMAT, |
|
1577 |
id, space->capacity_in_words(), p2i(dense_prefix_end), |
|
1578 |
dp_region, dp_words / region_size, |
|
1579 |
cr_words / region_size, p2i(new_top)); |
|
1 | 1580 |
} |
1581 |
} |
|
1582 |
||
1669
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
1583 |
#ifndef PRODUCT |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
1584 |
void PSParallelCompact::summary_phase_msg(SpaceId dst_space_id, |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
1585 |
HeapWord* dst_beg, HeapWord* dst_end, |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
1586 |
SpaceId src_space_id, |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
1587 |
HeapWord* src_beg, HeapWord* src_end) |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
1588 |
{ |
37146 | 1589 |
log_develop_trace(gc, compaction)( |
35061 | 1590 |
"Summarizing %d [%s] into %d [%s]: " |
1591 |
"src=" PTR_FORMAT "-" PTR_FORMAT " " |
|
1592 |
SIZE_FORMAT "-" SIZE_FORMAT " " |
|
1593 |
"dst=" PTR_FORMAT "-" PTR_FORMAT " " |
|
1594 |
SIZE_FORMAT "-" SIZE_FORMAT, |
|
1595 |
src_space_id, space_names[src_space_id], |
|
1596 |
dst_space_id, space_names[dst_space_id], |
|
1597 |
p2i(src_beg), p2i(src_end), |
|
1598 |
_summary_data.addr_to_region_idx(src_beg), |
|
1599 |
_summary_data.addr_to_region_idx(src_end), |
|
1600 |
p2i(dst_beg), p2i(dst_end), |
|
1601 |
_summary_data.addr_to_region_idx(dst_beg), |
|
1602 |
_summary_data.addr_to_region_idx(dst_end)); |
|
1669
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
1603 |
} |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
1604 |
#endif // #ifndef PRODUCT |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
1605 |
|
1 | 1606 |
void PSParallelCompact::summary_phase(ParCompactionManager* cm, |
1607 |
bool maximum_compaction) |
|
1608 |
{ |
|
37146 | 1609 |
GCTraceTime(Info, gc, phases) tm("Summary Phase", &_gc_timer); |
1 | 1610 |
|
1611 |
#ifdef ASSERT |
|
1612 |
if (TraceParallelOldGCMarkingPhase) { |
|
1613 |
tty->print_cr("add_obj_count=" SIZE_FORMAT " " |
|
1614 |
"add_obj_bytes=" SIZE_FORMAT, |
|
1615 |
add_obj_count, add_obj_size * HeapWordSize); |
|
1616 |
tty->print_cr("mark_bitmap_count=" SIZE_FORMAT " " |
|
1617 |
"mark_bitmap_bytes=" SIZE_FORMAT, |
|
1618 |
mark_bitmap_count, mark_bitmap_size * HeapWordSize); |
|
1619 |
} |
|
1620 |
#endif // #ifdef ASSERT |
|
1621 |
||
1622 |
// Quick summarization of each space into itself, to see how much is live. |
|
1623 |
summarize_spaces_quick(); |
|
1624 |
||
37146 | 1625 |
log_develop_trace(gc, compaction)("summary phase: after summarizing each space to self"); |
35061 | 1626 |
NOT_PRODUCT(print_region_ranges()); |
1627 |
NOT_PRODUCT(print_initial_summary_data(_summary_data, _space_info)); |
|
1 | 1628 |
|
1629 |
// The amount of live data that will end up in old space (assuming it fits). |
|
1630 |
size_t old_space_total_live = 0; |
|
1669
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
1631 |
for (unsigned int id = old_space_id; id < last_space_id; ++id) { |
1 | 1632 |
old_space_total_live += pointer_delta(_space_info[id].new_top(), |
1633 |
_space_info[id].space()->bottom()); |
|
1634 |
} |
|
1635 |
||
1669
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
1636 |
MutableSpace* const old_space = _space_info[old_space_id].space(); |
1670
0deb85ea62d5
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
1669
diff
changeset
|
1637 |
const size_t old_capacity = old_space->capacity_in_words(); |
0deb85ea62d5
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
1669
diff
changeset
|
1638 |
if (old_space_total_live > old_capacity) { |
1 | 1639 |
// XXX - should also try to expand |
1640 |
maximum_compaction = true; |
|
1641 |
} |
|
1642 |
||
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13195
diff
changeset
|
1643 |
// Old generations. |
1 | 1644 |
summarize_space(old_space_id, maximum_compaction); |
1645 |
||
1669
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
1646 |
// Summarize the remaining spaces in the young gen. The initial target space |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
1647 |
// is the old gen. If a space does not fit entirely into the target, then the |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
1648 |
// remainder is compacted into the space itself and that space becomes the new |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
1649 |
// target. |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
1650 |
SpaceId dst_space_id = old_space_id; |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
1651 |
HeapWord* dst_space_end = old_space->end(); |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
1652 |
HeapWord** new_top_addr = _space_info[dst_space_id].new_top_addr(); |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
1653 |
for (unsigned int id = eden_space_id; id < last_space_id; ++id) { |
1 | 1654 |
const MutableSpace* space = _space_info[id].space(); |
1655 |
const size_t live = pointer_delta(_space_info[id].new_top(), |
|
1656 |
space->bottom()); |
|
1669
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
1657 |
const size_t available = pointer_delta(dst_space_end, *new_top_addr); |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
1658 |
|
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
1659 |
NOT_PRODUCT(summary_phase_msg(dst_space_id, *new_top_addr, dst_space_end, |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
1660 |
SpaceId(id), space->bottom(), space->top());) |
974
6bbfda0c2a55
6724367: par compact could clear less young gen summary data
jcoomes
parents:
973
diff
changeset
|
1661 |
if (live > 0 && live <= available) { |
1 | 1662 |
// All the live data will fit. |
1669
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
1663 |
bool done = _summary_data.summarize(_space_info[id].split_info(), |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
1664 |
space->bottom(), space->top(), |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
1665 |
NULL, |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
1666 |
*new_top_addr, dst_space_end, |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
1667 |
new_top_addr); |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
1668 |
assert(done, "space must fit into old gen"); |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
1669 |
|
974
6bbfda0c2a55
6724367: par compact could clear less young gen summary data
jcoomes
parents:
973
diff
changeset
|
1670 |
// Reset the new_top value for the space. |
6bbfda0c2a55
6724367: par compact could clear less young gen summary data
jcoomes
parents:
973
diff
changeset
|
1671 |
_space_info[id].set_new_top(space->bottom()); |
1669
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
1672 |
} else if (live > 0) { |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
1673 |
// Attempt to fit part of the source space into the target space. |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
1674 |
HeapWord* next_src_addr = NULL; |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
1675 |
bool done = _summary_data.summarize(_space_info[id].split_info(), |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
1676 |
space->bottom(), space->top(), |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
1677 |
&next_src_addr, |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
1678 |
*new_top_addr, dst_space_end, |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
1679 |
new_top_addr); |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
1680 |
assert(!done, "space should not fit into old gen"); |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
1681 |
assert(next_src_addr != NULL, "sanity"); |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
1682 |
|
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
1683 |
// The source space becomes the new target, so the remainder is compacted |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
1684 |
// within the space itself. |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
1685 |
dst_space_id = SpaceId(id); |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
1686 |
dst_space_end = space->end(); |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
1687 |
new_top_addr = _space_info[id].new_top_addr(); |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
1688 |
NOT_PRODUCT(summary_phase_msg(dst_space_id, |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
1689 |
space->bottom(), dst_space_end, |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
1690 |
SpaceId(id), next_src_addr, space->top());) |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
1691 |
done = _summary_data.summarize(_space_info[id].split_info(), |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
1692 |
next_src_addr, space->top(), |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
1693 |
NULL, |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
1694 |
space->bottom(), dst_space_end, |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
1695 |
new_top_addr); |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
1696 |
assert(done, "space must fit when compacted into itself"); |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
1697 |
assert(*new_top_addr <= space->top(), "usage should not grow"); |
1 | 1698 |
} |
1699 |
} |
|
1700 |
||
37146 | 1701 |
log_develop_trace(gc, compaction)("Summary_phase: after final summarization"); |
35061 | 1702 |
NOT_PRODUCT(print_region_ranges()); |
1703 |
NOT_PRODUCT(print_initial_summary_data(_summary_data, _space_info)); |
|
1 | 1704 |
} |
1705 |
||
1706 |
// This method should contain all heap-specific policy for invoking a full |
|
1707 |
// collection. invoke_no_policy() will only attempt to compact the heap; it |
|
1708 |
// will do nothing further. If we need to bail out for policy reasons, scavenge |
|
1709 |
// before full gc, or any other specialized behavior, it needs to be added here. |
|
1710 |
// |
|
1711 |
// Note that this method should only be called from the vm_thread while at a |
|
1712 |
// safepoint. |
|
5343
95a5c4b89273
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
jmasa
parents:
5076
diff
changeset
|
1713 |
// |
54678
93f09ca4a7f8
8198505: Remove CollectorPolicy and its subclasses
stefank
parents:
54669
diff
changeset
|
1714 |
// Note that the all_soft_refs_clear flag in the soft ref policy |
5343
95a5c4b89273
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
jmasa
parents:
5076
diff
changeset
|
1715 |
// may be true because this method can be called without intervening |
95a5c4b89273
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
jmasa
parents:
5076
diff
changeset
|
1716 |
// activity. For example when the heap space is tight and full measure |
95a5c4b89273
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
jmasa
parents:
5076
diff
changeset
|
1717 |
// are being taken to free space. |
1 | 1718 |
void PSParallelCompact::invoke(bool maximum_heap_compaction) { |
1719 |
assert(SafepointSynchronize::is_at_safepoint(), "should be at safepoint"); |
|
1720 |
assert(Thread::current() == (Thread*)VMThread::vm_thread(), |
|
1721 |
"should be in vm thread"); |
|
5343
95a5c4b89273
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
jmasa
parents:
5076
diff
changeset
|
1722 |
|
30173
13cf7580b000
8077413: Avoid use of Universe::heap() inside collectors
pliden
parents:
30150
diff
changeset
|
1723 |
ParallelScavengeHeap* heap = ParallelScavengeHeap::heap(); |
1 | 1724 |
GCCause::Cause gc_cause = heap->gc_cause(); |
1725 |
assert(!heap->is_gc_active(), "not reentrant"); |
|
1726 |
||
1727 |
PSAdaptiveSizePolicy* policy = heap->size_policy(); |
|
5343
95a5c4b89273
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
jmasa
parents:
5076
diff
changeset
|
1728 |
IsGCActiveMark mark; |
95a5c4b89273
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
jmasa
parents:
5076
diff
changeset
|
1729 |
|
95a5c4b89273
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
jmasa
parents:
5076
diff
changeset
|
1730 |
if (ScavengeBeforeFullGC) { |
95a5c4b89273
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
jmasa
parents:
5076
diff
changeset
|
1731 |
PSScavenge::invoke_no_policy(); |
1 | 1732 |
} |
5343
95a5c4b89273
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
jmasa
parents:
5076
diff
changeset
|
1733 |
|
95a5c4b89273
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
jmasa
parents:
5076
diff
changeset
|
1734 |
const bool clear_all_soft_refs = |
49047
8f004146e407
8198515: Extract SoftReferencePolicy code out of CollectorPolicy
stefank
parents:
49041
diff
changeset
|
1735 |
heap->soft_ref_policy()->should_clear_all_soft_refs(); |
5343
95a5c4b89273
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
jmasa
parents:
5076
diff
changeset
|
1736 |
|
95a5c4b89273
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
jmasa
parents:
5076
diff
changeset
|
1737 |
PSParallelCompact::invoke_no_policy(clear_all_soft_refs || |
95a5c4b89273
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
jmasa
parents:
5076
diff
changeset
|
1738 |
maximum_heap_compaction); |
1 | 1739 |
} |
1740 |
||
1741 |
// This method contains no policy. You should probably |
|
1742 |
// be calling invoke() instead. |
|
11757
cdf6204b114a
7146343: PS invoke methods should indicate the type of gc done
jcoomes
parents:
11636
diff
changeset
|
1743 |
bool PSParallelCompact::invoke_no_policy(bool maximum_heap_compaction) { |
1 | 1744 |
assert(SafepointSynchronize::is_at_safepoint(), "must be at a safepoint"); |
1745 |
assert(ref_processor() != NULL, "Sanity"); |
|
1746 |
||
35492
c8c0273e6b91
8146690: Make all classes in GC follow the naming convention.
david
parents:
35061
diff
changeset
|
1747 |
if (GCLocker::check_active_before_gc()) { |
11757
cdf6204b114a
7146343: PS invoke methods should indicate the type of gc done
jcoomes
parents:
11636
diff
changeset
|
1748 |
return false; |
1 | 1749 |
} |
1750 |
||
30173
13cf7580b000
8077413: Avoid use of Universe::heap() inside collectors
pliden
parents:
30150
diff
changeset
|
1751 |
ParallelScavengeHeap* heap = ParallelScavengeHeap::heap(); |
18025 | 1752 |
|
33107
77bf0d2069a3
8134953: Make the GC ID available in a central place
brutisso
parents:
33105
diff
changeset
|
1753 |
GCIdMark gc_id_mark; |
21767
41eaa9a17059
8028128: Add a type safe alternative for working with counter based data
mgronlun
parents:
20317
diff
changeset
|
1754 |
_gc_timer.register_gc_start(); |
18025 | 1755 |
_gc_tracer.report_gc_start(heap->gc_cause(), _gc_timer.gc_start()); |
1756 |
||
1 | 1757 |
TimeStamp marking_start; |
1758 |
TimeStamp compaction_start; |
|
1759 |
TimeStamp collection_exit; |
|
1760 |
||
1761 |
GCCause::Cause gc_cause = heap->gc_cause(); |
|
1762 |
PSYoungGen* young_gen = heap->young_gen(); |
|
1763 |
PSOldGen* old_gen = heap->old_gen(); |
|
1764 |
PSAdaptiveSizePolicy* size_policy = heap->size_policy(); |
|
1765 |
||
5343
95a5c4b89273
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
jmasa
parents:
5076
diff
changeset
|
1766 |
// The scope of casr should end after code that can change |
54678
93f09ca4a7f8
8198505: Remove CollectorPolicy and its subclasses
stefank
parents:
54669
diff
changeset
|
1767 |
// SoftRefPolicy::_should_clear_all_soft_refs. |
5343
95a5c4b89273
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
jmasa
parents:
5076
diff
changeset
|
1768 |
ClearedAllSoftRefs casr(maximum_heap_compaction, |
49047
8f004146e407
8198515: Extract SoftReferencePolicy code out of CollectorPolicy
stefank
parents:
49041
diff
changeset
|
1769 |
heap->soft_ref_policy()); |
5343
95a5c4b89273
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
jmasa
parents:
5076
diff
changeset
|
1770 |
|
971
f0b20be4165d
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
756
diff
changeset
|
1771 |
if (ZapUnusedHeapArea) { |
f0b20be4165d
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
756
diff
changeset
|
1772 |
// Save information needed to minimize mangling |
f0b20be4165d
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
756
diff
changeset
|
1773 |
heap->record_gen_tops_before_GC(); |
f0b20be4165d
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
756
diff
changeset
|
1774 |
} |
f0b20be4165d
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
756
diff
changeset
|
1775 |
|
1 | 1776 |
// Make sure data structures are sane, make the heap parsable, and do other |
1777 |
// miscellaneous bookkeeping. |
|
35061 | 1778 |
pre_compact(); |
1779 |
||
57662
f81dbe27a7b1
8227225: ParallelGC: add subspace transitions for young gen for gc+heap=info log lines
tonyp
parents:
55740
diff
changeset
|
1780 |
const PreGenGCValues pre_gc_values = heap->get_pre_gc_values(); |
1 | 1781 |
|
756 | 1782 |
// Get the compaction manager reserved for the VM thread. |
1783 |
ParCompactionManager* const vmthread_cm = |
|
57773
5cbc3bd9fdfd
8224665: Parallel GC: Use WorkGang (7: remove task manager)
lkorinth
parents:
57769
diff
changeset
|
1784 |
ParCompactionManager::manager_array(ParallelScavengeHeap::heap()->workers().total_workers()); |
756 | 1785 |
|
1 | 1786 |
{ |
1787 |
ResourceMark rm; |
|
1788 |
HandleMark hm; |
|
1789 |
||
57767
b3e44e1b135d
8224659: Parallel GC: Use WorkGang (1: PCRefProcTask)
lkorinth
parents:
57662
diff
changeset
|
1790 |
const uint active_workers = |
b3e44e1b135d
8224659: Parallel GC: Use WorkGang (1: PCRefProcTask)
lkorinth
parents:
57662
diff
changeset
|
1791 |
WorkerPolicy::calc_active_workers(ParallelScavengeHeap::heap()->workers().total_workers(), |
b3e44e1b135d
8224659: Parallel GC: Use WorkGang (1: PCRefProcTask)
lkorinth
parents:
57662
diff
changeset
|
1792 |
ParallelScavengeHeap::heap()->workers().active_workers(), |
b3e44e1b135d
8224659: Parallel GC: Use WorkGang (1: PCRefProcTask)
lkorinth
parents:
57662
diff
changeset
|
1793 |
Threads::number_of_non_daemon_threads()); |
b3e44e1b135d
8224659: Parallel GC: Use WorkGang (1: PCRefProcTask)
lkorinth
parents:
57662
diff
changeset
|
1794 |
ParallelScavengeHeap::heap()->workers().update_active_workers(active_workers); |
b3e44e1b135d
8224659: Parallel GC: Use WorkGang (1: PCRefProcTask)
lkorinth
parents:
57662
diff
changeset
|
1795 |
|
35061 | 1796 |
GCTraceCPUTime tcpu; |
1797 |
GCTraceTime(Info, gc) tm("Pause Full", NULL, gc_cause, true); |
|
35939
05df7e64ecfc
8149035: Make the full_gc_dump() calls be recorded as part of the GC
brutisso
parents:
35901
diff
changeset
|
1798 |
|
05df7e64ecfc
8149035: Make the full_gc_dump() calls be recorded as part of the GC
brutisso
parents:
35901
diff
changeset
|
1799 |
heap->pre_full_gc_dump(&_gc_timer); |
05df7e64ecfc
8149035: Make the full_gc_dump() calls be recorded as part of the GC
brutisso
parents:
35901
diff
changeset
|
1800 |
|
1 | 1801 |
TraceCollectorStats tcs(counters()); |
48168
cb5d2d4453d0
8191564: Refactor GC related servicability code into GC specific subclasses
rkennke
parents:
47799
diff
changeset
|
1802 |
TraceMemoryManagerStats tms(heap->old_gc_manager(), gc_cause); |
1 | 1803 |
|
47546
64ba55ba8516
8184286: print_tracing_info() does not use Unified Logging for output
sjohanss
parents:
47216
diff
changeset
|
1804 |
if (log_is_enabled(Debug, gc, heap, exit)) { |
64ba55ba8516
8184286: print_tracing_info() does not use Unified Logging for output
sjohanss
parents:
47216
diff
changeset
|
1805 |
accumulated_time()->start(); |
64ba55ba8516
8184286: print_tracing_info() does not use Unified Logging for output
sjohanss
parents:
47216
diff
changeset
|
1806 |
} |
1 | 1807 |
|
1808 |
// Let the size policy know we're starting |
|
1809 |
size_policy->major_collection_begin(); |
|
1810 |
||
47799 | 1811 |
#if COMPILER2_OR_JVMCI |
33160
c59f1676d27e
8136421: JEP 243: Java-Level JVM Compiler Interface
twisti
parents:
32623
diff
changeset
|
1812 |
DerivedPointerTable::clear(); |
c59f1676d27e
8136421: JEP 243: Java-Level JVM Compiler Interface
twisti
parents:
32623
diff
changeset
|
1813 |
#endif |
1 | 1814 |
|
28212
647b7d0efb88
8066827: Remove ReferenceProcessor::clean_up_discovered_references()
kbarrett
parents:
27887
diff
changeset
|
1815 |
ref_processor()->enable_discovery(); |
1610
5dddd195cc86
6778647: snap(), snap_policy() should be renamed setup(), setup_policy()
ysr
parents:
1606
diff
changeset
|
1816 |
ref_processor()->setup_policy(maximum_heap_compaction); |
1 | 1817 |
|
1818 |
bool marked_for_unloading = false; |
|
1819 |
||
1820 |
marking_start.update(); |
|
18025 | 1821 |
marking_phase(vmthread_cm, maximum_heap_compaction, &_gc_tracer); |
1 | 1822 |
|
12630
ddf6ee008138
7166894: Add gc cause to GC logging for all collectors
brutisso
parents:
11757
diff
changeset
|
1823 |
bool max_on_system_gc = UseMaximumCompactionOnSystemGC |
31032
8e72621ca186
8072913: [REDO] GCCause should distinguish jcmd GC.run from System.gc()
ysuenaga
parents:
30876
diff
changeset
|
1824 |
&& GCCause::is_user_requested_gc(gc_cause); |
756 | 1825 |
summary_phase(vmthread_cm, maximum_heap_compaction || max_on_system_gc); |
1 | 1826 |
|
47799 | 1827 |
#if COMPILER2_OR_JVMCI |
33160
c59f1676d27e
8136421: JEP 243: Java-Level JVM Compiler Interface
twisti
parents:
32623
diff
changeset
|
1828 |
assert(DerivedPointerTable::is_active(), "Sanity"); |
c59f1676d27e
8136421: JEP 243: Java-Level JVM Compiler Interface
twisti
parents:
32623
diff
changeset
|
1829 |
DerivedPointerTable::set_active(false); |
c59f1676d27e
8136421: JEP 243: Java-Level JVM Compiler Interface
twisti
parents:
32623
diff
changeset
|
1830 |
#endif |
1 | 1831 |
|
1832 |
// adjust_roots() updates Universe::_intArrayKlassObj which is |
|
1833 |
// needed by the compaction for filling holes in the dense prefix. |
|
35877
a2a62511d0f8
8146987: Improve Parallel GC Full GC by caching results of live_words_in_range()
tschatzl
parents:
35862
diff
changeset
|
1834 |
adjust_roots(vmthread_cm); |
1 | 1835 |
|
1836 |
compaction_start.update(); |
|
9178
1a022d4f1bc3
6841742: par compact - remove unused/unsupported options
jcoomes
parents:
8688
diff
changeset
|
1837 |
compact(); |
1 | 1838 |
|
1839 |
// Reset the mark bitmap, summary data, and do other bookkeeping. Must be |
|
1840 |
// done before resizing. |
|
1841 |
post_compact(); |
|
1842 |
||
1843 |
// Let the size policy know we're done |
|
1844 |
size_policy->major_collection_end(old_gen->used_in_bytes(), gc_cause); |
|
1845 |
||
1846 |
if (UseAdaptiveSizePolicy) { |
|
35061 | 1847 |
log_debug(gc, ergo)("AdaptiveSizeStart: collection: %d ", heap->total_collections()); |
1848 |
log_trace(gc, ergo)("old_gen_capacity: " SIZE_FORMAT " young_gen_capacity: " SIZE_FORMAT, |
|
1849 |
old_gen->capacity_in_bytes(), young_gen->capacity_in_bytes()); |
|
1 | 1850 |
|
1851 |
// Don't check if the size_policy is ready here. Let |
|
1852 |
// the size_policy check that internally. |
|
1853 |
if (UseAdaptiveGenerationSizePolicyAtMajorCollection && |
|
31634
0aa645cd8cc3
7012980: PSOldGen is increased if there is no space in Metaspace
jmasa
parents:
31330
diff
changeset
|
1854 |
AdaptiveSizePolicy::should_update_promo_stats(gc_cause)) { |
23226
3a3de05bb757
7098155: Resize young gen at full collections for UseParallelGC
jmasa
parents:
22551
diff
changeset
|
1855 |
// Swap the survivor spaces if from_space is empty. The |
3a3de05bb757
7098155: Resize young gen at full collections for UseParallelGC
jmasa
parents:
22551
diff
changeset
|
1856 |
// resize_young_gen() called below is normally used after |
3a3de05bb757
7098155: Resize young gen at full collections for UseParallelGC
jmasa
parents:
22551
diff
changeset
|
1857 |
// a successful young GC and swapping of survivor spaces; |
3a3de05bb757
7098155: Resize young gen at full collections for UseParallelGC
jmasa
parents:
22551
diff
changeset
|
1858 |
// otherwise, it will fail to resize the young gen with |
3a3de05bb757
7098155: Resize young gen at full collections for UseParallelGC
jmasa
parents:
22551
diff
changeset
|
1859 |
// the current implementation. |
3a3de05bb757
7098155: Resize young gen at full collections for UseParallelGC
jmasa
parents:
22551
diff
changeset
|
1860 |
if (young_gen->from_space()->is_empty()) { |
3a3de05bb757
7098155: Resize young gen at full collections for UseParallelGC
jmasa
parents:
22551
diff
changeset
|
1861 |
young_gen->from_space()->clear(SpaceDecorator::Mangle); |
3a3de05bb757
7098155: Resize young gen at full collections for UseParallelGC
jmasa
parents:
22551
diff
changeset
|
1862 |
young_gen->swap_spaces(); |
3a3de05bb757
7098155: Resize young gen at full collections for UseParallelGC
jmasa
parents:
22551
diff
changeset
|
1863 |
} |
3a3de05bb757
7098155: Resize young gen at full collections for UseParallelGC
jmasa
parents:
22551
diff
changeset
|
1864 |
|
1 | 1865 |
// Calculate optimal free space amounts |
1866 |
assert(young_gen->max_size() > |
|
1867 |
young_gen->from_space()->capacity_in_bytes() + |
|
1868 |
young_gen->to_space()->capacity_in_bytes(), |
|
1869 |
"Sizes of space in young gen are out-of-bounds"); |
|
17393
7e99f263902c
8007763: Refactoring: split up compute_generation_free_space() into two functions for class PSAdaptiveSizePolicy
tamao
parents:
17390
diff
changeset
|
1870 |
|
7e99f263902c
8007763: Refactoring: split up compute_generation_free_space() into two functions for class PSAdaptiveSizePolicy
tamao
parents:
17390
diff
changeset
|
1871 |
size_t young_live = young_gen->used_in_bytes(); |
7e99f263902c
8007763: Refactoring: split up compute_generation_free_space() into two functions for class PSAdaptiveSizePolicy
tamao
parents:
17390
diff
changeset
|
1872 |
size_t eden_live = young_gen->eden_space()->used_in_bytes(); |
7e99f263902c
8007763: Refactoring: split up compute_generation_free_space() into two functions for class PSAdaptiveSizePolicy
tamao
parents:
17390
diff
changeset
|
1873 |
size_t old_live = old_gen->used_in_bytes(); |
7e99f263902c
8007763: Refactoring: split up compute_generation_free_space() into two functions for class PSAdaptiveSizePolicy
tamao
parents:
17390
diff
changeset
|
1874 |
size_t cur_eden = young_gen->eden_space()->capacity_in_bytes(); |
7e99f263902c
8007763: Refactoring: split up compute_generation_free_space() into two functions for class PSAdaptiveSizePolicy
tamao
parents:
17390
diff
changeset
|
1875 |
size_t max_old_gen_size = old_gen->max_gen_size(); |
1 | 1876 |
size_t max_eden_size = young_gen->max_size() - |
1877 |
young_gen->from_space()->capacity_in_bytes() - |
|
1878 |
young_gen->to_space()->capacity_in_bytes(); |
|
17393
7e99f263902c
8007763: Refactoring: split up compute_generation_free_space() into two functions for class PSAdaptiveSizePolicy
tamao
parents:
17390
diff
changeset
|
1879 |
|
7e99f263902c
8007763: Refactoring: split up compute_generation_free_space() into two functions for class PSAdaptiveSizePolicy
tamao
parents:
17390
diff
changeset
|
1880 |
// Used for diagnostics |
7e99f263902c
8007763: Refactoring: split up compute_generation_free_space() into two functions for class PSAdaptiveSizePolicy
tamao
parents:
17390
diff
changeset
|
1881 |
size_policy->clear_generation_free_space_flags(); |
7e99f263902c
8007763: Refactoring: split up compute_generation_free_space() into two functions for class PSAdaptiveSizePolicy
tamao
parents:
17390
diff
changeset
|
1882 |
|
17842
0d11fa49f81f
8007762: Rename a bunch of methods in size policy across collectors
tamao
parents:
17627
diff
changeset
|
1883 |
size_policy->compute_generations_free_space(young_live, |
0d11fa49f81f
8007762: Rename a bunch of methods in size policy across collectors
tamao
parents:
17627
diff
changeset
|
1884 |
eden_live, |
0d11fa49f81f
8007762: Rename a bunch of methods in size policy across collectors
tamao
parents:
17627
diff
changeset
|
1885 |
old_live, |
0d11fa49f81f
8007762: Rename a bunch of methods in size policy across collectors
tamao
parents:
17627
diff
changeset
|
1886 |
cur_eden, |
0d11fa49f81f
8007762: Rename a bunch of methods in size policy across collectors
tamao
parents:
17627
diff
changeset
|
1887 |
max_old_gen_size, |
0d11fa49f81f
8007762: Rename a bunch of methods in size policy across collectors
tamao
parents:
17627
diff
changeset
|
1888 |
max_eden_size, |
0d11fa49f81f
8007762: Rename a bunch of methods in size policy across collectors
tamao
parents:
17627
diff
changeset
|
1889 |
true /* full gc*/); |
17393
7e99f263902c
8007763: Refactoring: split up compute_generation_free_space() into two functions for class PSAdaptiveSizePolicy
tamao
parents:
17390
diff
changeset
|
1890 |
|
54085
ab87b06dfdc0
8212206: Refactor AdaptiveSizePolicy to separate out code related to GC overhead
manc
parents:
53726
diff
changeset
|
1891 |
size_policy->check_gc_overhead_limit(eden_live, |
17393
7e99f263902c
8007763: Refactoring: split up compute_generation_free_space() into two functions for class PSAdaptiveSizePolicy
tamao
parents:
17390
diff
changeset
|
1892 |
max_old_gen_size, |
7e99f263902c
8007763: Refactoring: split up compute_generation_free_space() into two functions for class PSAdaptiveSizePolicy
tamao
parents:
17390
diff
changeset
|
1893 |
max_eden_size, |
7e99f263902c
8007763: Refactoring: split up compute_generation_free_space() into two functions for class PSAdaptiveSizePolicy
tamao
parents:
17390
diff
changeset
|
1894 |
true /* full gc*/, |
7e99f263902c
8007763: Refactoring: split up compute_generation_free_space() into two functions for class PSAdaptiveSizePolicy
tamao
parents:
17390
diff
changeset
|
1895 |
gc_cause, |
49047
8f004146e407
8198515: Extract SoftReferencePolicy code out of CollectorPolicy
stefank
parents:
49041
diff
changeset
|
1896 |
heap->soft_ref_policy()); |
17393
7e99f263902c
8007763: Refactoring: split up compute_generation_free_space() into two functions for class PSAdaptiveSizePolicy
tamao
parents:
17390
diff
changeset
|
1897 |
|
7e99f263902c
8007763: Refactoring: split up compute_generation_free_space() into two functions for class PSAdaptiveSizePolicy
tamao
parents:
17390
diff
changeset
|
1898 |
size_policy->decay_supplemental_growth(true /* full gc*/); |
971
f0b20be4165d
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
756
diff
changeset
|
1899 |
|
f0b20be4165d
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
756
diff
changeset
|
1900 |
heap->resize_old_gen( |
f0b20be4165d
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
756
diff
changeset
|
1901 |
size_policy->calculated_old_free_size_in_bytes()); |
1 | 1902 |
|
23226
3a3de05bb757
7098155: Resize young gen at full collections for UseParallelGC
jmasa
parents:
22551
diff
changeset
|
1903 |
heap->resize_young_gen(size_policy->calculated_eden_size_in_bytes(), |
3a3de05bb757
7098155: Resize young gen at full collections for UseParallelGC
jmasa
parents:
22551
diff
changeset
|
1904 |
size_policy->calculated_survivor_size_in_bytes()); |
1 | 1905 |
} |
35061 | 1906 |
|
1907 |
log_debug(gc, ergo)("AdaptiveSizeStop: collection: %d ", heap->total_collections()); |
|
1 | 1908 |
} |
1909 |
||
1910 |
if (UsePerfData) { |
|
1911 |
PSGCAdaptivePolicyCounters* const counters = heap->gc_policy_counters(); |
|
1912 |
counters->update_counters(); |
|
1913 |
counters->update_old_capacity(old_gen->capacity_in_bytes()); |
|
1914 |
counters->update_young_capacity(young_gen->capacity_in_bytes()); |
|
1915 |
} |
|
1916 |
||
1917 |
heap->resize_all_tlabs(); |
|
1918 |
||
22551 | 1919 |
// Resize the metaspace capacity after a collection |
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13195
diff
changeset
|
1920 |
MetaspaceGC::compute_new_size(); |
1 | 1921 |
|
47546
64ba55ba8516
8184286: print_tracing_info() does not use Unified Logging for output
sjohanss
parents:
47216
diff
changeset
|
1922 |
if (log_is_enabled(Debug, gc, heap, exit)) { |
35061 | 1923 |
accumulated_time()->stop(); |
1 | 1924 |
} |
1925 |
||
57662
f81dbe27a7b1
8227225: ParallelGC: add subspace transitions for young gen for gc+heap=info log lines
tonyp
parents:
55740
diff
changeset
|
1926 |
heap->print_heap_change(pre_gc_values); |
35061 | 1927 |
|
1 | 1928 |
// Track memory usage and detect low memory |
1929 |
MemoryService::track_memory_usage(); |
|
1930 |
heap->update_counters(); |
|
35939
05df7e64ecfc
8149035: Make the full_gc_dump() calls be recorded as part of the GC
brutisso
parents:
35901
diff
changeset
|
1931 |
|
05df7e64ecfc
8149035: Make the full_gc_dump() calls be recorded as part of the GC
brutisso
parents:
35901
diff
changeset
|
1932 |
heap->post_full_gc_dump(&_gc_timer); |
1 | 1933 |
} |
1934 |
||
6762
f8d1b560700e
6423256: GC stacks should use a better data structure
jcoomes
parents:
6759
diff
changeset
|
1935 |
#ifdef ASSERT |
f8d1b560700e
6423256: GC stacks should use a better data structure
jcoomes
parents:
6759
diff
changeset
|
1936 |
for (size_t i = 0; i < ParallelGCThreads + 1; ++i) { |
f8d1b560700e
6423256: GC stacks should use a better data structure
jcoomes
parents:
6759
diff
changeset
|
1937 |
ParCompactionManager* const cm = |
f8d1b560700e
6423256: GC stacks should use a better data structure
jcoomes
parents:
6759
diff
changeset
|
1938 |
ParCompactionManager::manager_array(int(i)); |
f8d1b560700e
6423256: GC stacks should use a better data structure
jcoomes
parents:
6759
diff
changeset
|
1939 |
assert(cm->marking_stack()->is_empty(), "should be empty"); |
38179
d2c90d6c5bf4
8155966: Assertion failures when -XX:+UseParallelGC -XX:ParallelGCThreads=1
jmasa
parents:
38170
diff
changeset
|
1940 |
assert(cm->region_stack()->is_empty(), "Region stack " SIZE_FORMAT " is not empty", i); |
6762
f8d1b560700e
6423256: GC stacks should use a better data structure
jcoomes
parents:
6759
diff
changeset
|
1941 |
} |
f8d1b560700e
6423256: GC stacks should use a better data structure
jcoomes
parents:
6759
diff
changeset
|
1942 |
#endif // ASSERT |
f8d1b560700e
6423256: GC stacks should use a better data structure
jcoomes
parents:
6759
diff
changeset
|
1943 |
|
1 | 1944 |
if (VerifyAfterGC && heap->total_collections() >= VerifyGCStartAt) { |
1945 |
HandleMark hm; // Discard invalid handles created during verification |
|
35061 | 1946 |
Universe::verify("After GC"); |
1 | 1947 |
} |
1948 |
||
1949 |
// Re-verify object start arrays |
|
1950 |
if (VerifyObjectStartArray && |
|
1951 |
VerifyAfterGC) { |
|
1952 |
old_gen->verify_object_start_array(); |
|
1953 |
} |
|
1954 |
||
971
f0b20be4165d
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
756
diff
changeset
|
1955 |
if (ZapUnusedHeapArea) { |
f0b20be4165d
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
756
diff
changeset
|
1956 |
old_gen->object_space()->check_mangled_unused_area_complete(); |
f0b20be4165d
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
756
diff
changeset
|
1957 |
} |
f0b20be4165d
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
756
diff
changeset
|
1958 |
|
1 | 1959 |
NOT_PRODUCT(ref_processor()->verify_no_references_recorded()); |
1960 |
||
1961 |
collection_exit.update(); |
|
1962 |
||
11636
3c07b54482a5
7141200: log some interesting information in ring buffers for crashes
never
parents:
11251
diff
changeset
|
1963 |
heap->print_heap_after_gc(); |
18025 | 1964 |
heap->trace_heap_after_gc(&_gc_tracer); |
1965 |
||
35061 | 1966 |
log_debug(gc, task, time)("VM-Thread " JLONG_FORMAT " " JLONG_FORMAT " " JLONG_FORMAT, |
1967 |
marking_start.ticks(), compaction_start.ticks(), |
|
1968 |
collection_exit.ticks()); |
|
2010
c13462bbad17
6690928: Use spinning in combination with yields for workstealing termination.
jmasa
parents:
1683
diff
changeset
|
1969 |
|
c13462bbad17
6690928: Use spinning in combination with yields for workstealing termination.
jmasa
parents:
1683
diff
changeset
|
1970 |
#ifdef TRACESPINNING |
c13462bbad17
6690928: Use spinning in combination with yields for workstealing termination.
jmasa
parents:
1683
diff
changeset
|
1971 |
ParallelTaskTerminator::print_termination_counts(); |
c13462bbad17
6690928: Use spinning in combination with yields for workstealing termination.
jmasa
parents:
1683
diff
changeset
|
1972 |
#endif |
11757
cdf6204b114a
7146343: PS invoke methods should indicate the type of gc done
jcoomes
parents:
11636
diff
changeset
|
1973 |
|
35061 | 1974 |
AdaptiveSizePolicyOutput::print(size_policy, heap->total_collections()); |
1975 |
||
21767
41eaa9a17059
8028128: Add a type safe alternative for working with counter based data
mgronlun
parents:
20317
diff
changeset
|
1976 |
_gc_timer.register_gc_end(); |
18025 | 1977 |
|
1978 |
_gc_tracer.report_dense_prefix(dense_prefix(old_space_id)); |
|
1979 |
_gc_tracer.report_gc_end(_gc_timer.gc_end(), _gc_timer.time_partitions()); |
|
1980 |
||
11757
cdf6204b114a
7146343: PS invoke methods should indicate the type of gc done
jcoomes
parents:
11636
diff
changeset
|
1981 |
return true; |
1 | 1982 |
} |
1983 |
||
1984 |
bool PSParallelCompact::absorb_live_data_from_eden(PSAdaptiveSizePolicy* size_policy, |
|
1985 |
PSYoungGen* young_gen, |
|
1986 |
PSOldGen* old_gen) { |
|
1987 |
MutableSpace* const eden_space = young_gen->eden_space(); |
|
1988 |
assert(!eden_space->is_empty(), "eden must be non-empty"); |
|
1989 |
assert(young_gen->virtual_space()->alignment() == |
|
1990 |
old_gen->virtual_space()->alignment(), "alignments do not match"); |
|
1991 |
||
57773
5cbc3bd9fdfd
8224665: Parallel GC: Use WorkGang (7: remove task manager)
lkorinth
parents:
57769
diff
changeset
|
1992 |
// We also return false when it's a heterogeneous heap because old generation cannot absorb data from eden |
53117
37930c6ba6d7
8211424: Allocation of old generation of java heap on alternate memory devices - Parallel GC
sangheki
parents:
52905
diff
changeset
|
1993 |
// when it is allocated on different memory (example, nv-dimm) than young. |
37930c6ba6d7
8211424: Allocation of old generation of java heap on alternate memory devices - Parallel GC
sangheki
parents:
52905
diff
changeset
|
1994 |
if (!(UseAdaptiveSizePolicy && UseAdaptiveGCBoundary) || |
54678
93f09ca4a7f8
8198505: Remove CollectorPolicy and its subclasses
stefank
parents:
54669
diff
changeset
|
1995 |
ParallelArguments::is_heterogeneous_heap()) { |
1 | 1996 |
return false; |
1997 |
} |
|
1998 |
||
1999 |
// Both generations must be completely committed. |
|
2000 |
if (young_gen->virtual_space()->uncommitted_size() != 0) { |
|
2001 |
return false; |
|
2002 |
} |
|
2003 |
if (old_gen->virtual_space()->uncommitted_size() != 0) { |
|
2004 |
return false; |
|
2005 |
} |
|
2006 |
||
2007 |
// Figure out how much to take from eden. Include the average amount promoted |
|
2008 |
// in the total; otherwise the next young gen GC will simply bail out to a |
|
2009 |
// full GC. |
|
2010 |
const size_t alignment = old_gen->virtual_space()->alignment(); |
|
2011 |
const size_t eden_used = eden_space->used_in_bytes(); |
|
2012 |
const size_t promoted = (size_t)size_policy->avg_promoted()->padded_average(); |
|
46619
a3919f5e8d2b
8178499: Remove _ptr_ and _size_ infixes from align functions
stefank
parents:
46560
diff
changeset
|
2013 |
const size_t absorb_size = align_up(eden_used + promoted, alignment); |
1 | 2014 |
const size_t eden_capacity = eden_space->capacity_in_bytes(); |
2015 |
||
2016 |
if (absorb_size >= eden_capacity) { |
|
2017 |
return false; // Must leave some space in eden. |
|
2018 |
} |
|
2019 |
||
2020 |
const size_t new_young_size = young_gen->capacity_in_bytes() - absorb_size; |
|
2021 |
if (new_young_size < young_gen->min_gen_size()) { |
|
2022 |
return false; // Respect young gen minimum size. |
|
2023 |
} |
|
2024 |
||
51978 | 2025 |
log_trace(gc, ergo, heap)(" absorbing " SIZE_FORMAT "K: " |
2026 |
"eden " SIZE_FORMAT "K->" SIZE_FORMAT "K " |
|
2027 |
"from " SIZE_FORMAT "K, to " SIZE_FORMAT "K " |
|
2028 |
"young_gen " SIZE_FORMAT "K->" SIZE_FORMAT "K ", |
|
2029 |
absorb_size / K, |
|
2030 |
eden_capacity / K, (eden_capacity - absorb_size) / K, |
|
2031 |
young_gen->from_space()->used_in_bytes() / K, |
|
2032 |
young_gen->to_space()->used_in_bytes() / K, |
|
2033 |
young_gen->capacity_in_bytes() / K, new_young_size / K); |
|
1 | 2034 |
|
2035 |
// Fill the unused part of the old gen. |
|
2036 |
MutableSpace* const old_space = old_gen->object_space(); |
|
1668
8ec481b8f514
6578152: fill_region_with_object has usability and safety issues
jcoomes
parents:
1610
diff
changeset
|
2037 |
HeapWord* const unused_start = old_space->top(); |
8ec481b8f514
6578152: fill_region_with_object has usability and safety issues
jcoomes
parents:
1610
diff
changeset
|
2038 |
size_t const unused_words = pointer_delta(old_space->end(), unused_start); |
8ec481b8f514
6578152: fill_region_with_object has usability and safety issues
jcoomes
parents:
1610
diff
changeset
|
2039 |
|
8ec481b8f514
6578152: fill_region_with_object has usability and safety issues
jcoomes
parents:
1610
diff
changeset
|
2040 |
if (unused_words > 0) { |
8ec481b8f514
6578152: fill_region_with_object has usability and safety issues
jcoomes
parents:
1610
diff
changeset
|
2041 |
if (unused_words < CollectedHeap::min_fill_size()) { |
8ec481b8f514
6578152: fill_region_with_object has usability and safety issues
jcoomes
parents:
1610
diff
changeset
|
2042 |
return false; // If the old gen cannot be filled, must give up. |
8ec481b8f514
6578152: fill_region_with_object has usability and safety issues
jcoomes
parents:
1610
diff
changeset
|
2043 |
} |
8ec481b8f514
6578152: fill_region_with_object has usability and safety issues
jcoomes
parents:
1610
diff
changeset
|
2044 |
CollectedHeap::fill_with_objects(unused_start, unused_words); |
1 | 2045 |
} |
2046 |
||
2047 |
// Take the live data from eden and set both top and end in the old gen to |
|
2048 |
// eden top. (Need to set end because reset_after_change() mangles the region |
|
2049 |
// from end to virtual_space->high() in debug builds). |
|
2050 |
HeapWord* const new_top = eden_space->top(); |
|
2051 |
old_gen->virtual_space()->expand_into(young_gen->virtual_space(), |
|
2052 |
absorb_size); |
|
2053 |
young_gen->reset_after_change(); |
|
2054 |
old_space->set_top(new_top); |
|
2055 |
old_space->set_end(new_top); |
|
2056 |
old_gen->reset_after_change(); |
|
2057 |
||
2058 |
// Update the object start array for the filler object and the data from eden. |
|
2059 |
ObjectStartArray* const start_array = old_gen->start_array(); |
|
1668
8ec481b8f514
6578152: fill_region_with_object has usability and safety issues
jcoomes
parents:
1610
diff
changeset
|
2060 |
for (HeapWord* p = unused_start; p < new_top; p += oop(p)->size()) { |
8ec481b8f514
6578152: fill_region_with_object has usability and safety issues
jcoomes
parents:
1610
diff
changeset
|
2061 |
start_array->allocate_block(p); |
1 | 2062 |
} |
2063 |
||
2064 |
// Could update the promoted average here, but it is not typically updated at |
|
2065 |
// full GCs and the value to use is unclear. Something like |
|
2066 |
// |
|
2067 |
// cur_promoted_avg + absorb_size / number_of_scavenges_since_last_full_gc. |
|
2068 |
||
2069 |
size_policy->set_bytes_absorbed_from_eden(absorb_size); |
|
2070 |
return true; |
|
2071 |
} |
|
2072 |
||
50058
f7e564cacfbc
8202649: Move the Parallel GC specific task creation functions out of Threads
stefank
parents:
50049
diff
changeset
|
2073 |
class PCAddThreadRootsMarkingTaskClosure : public ThreadClosure { |
f7e564cacfbc
8202649: Move the Parallel GC specific task creation functions out of Threads
stefank
parents:
50049
diff
changeset
|
2074 |
private: |
57768
fc82b6cb8b14
8224660: Parallel GC: Use WorkGang (2: MarksFromRootsTask)
lkorinth
parents:
57767
diff
changeset
|
2075 |
uint _worker_id; |
50058
f7e564cacfbc
8202649: Move the Parallel GC specific task creation functions out of Threads
stefank
parents:
50049
diff
changeset
|
2076 |
|
f7e564cacfbc
8202649: Move the Parallel GC specific task creation functions out of Threads
stefank
parents:
50049
diff
changeset
|
2077 |
public: |
57768
fc82b6cb8b14
8224660: Parallel GC: Use WorkGang (2: MarksFromRootsTask)
lkorinth
parents:
57767
diff
changeset
|
2078 |
PCAddThreadRootsMarkingTaskClosure(uint worker_id) : _worker_id(worker_id) { } |
fc82b6cb8b14
8224660: Parallel GC: Use WorkGang (2: MarksFromRootsTask)
lkorinth
parents:
57767
diff
changeset
|
2079 |
void do_thread(Thread* thread) { |
fc82b6cb8b14
8224660: Parallel GC: Use WorkGang (2: MarksFromRootsTask)
lkorinth
parents:
57767
diff
changeset
|
2080 |
assert(ParallelScavengeHeap::heap()->is_gc_active(), "called outside gc"); |
fc82b6cb8b14
8224660: Parallel GC: Use WorkGang (2: MarksFromRootsTask)
lkorinth
parents:
57767
diff
changeset
|
2081 |
|
fc82b6cb8b14
8224660: Parallel GC: Use WorkGang (2: MarksFromRootsTask)
lkorinth
parents:
57767
diff
changeset
|
2082 |
ResourceMark rm; |
fc82b6cb8b14
8224660: Parallel GC: Use WorkGang (2: MarksFromRootsTask)
lkorinth
parents:
57767
diff
changeset
|
2083 |
|
fc82b6cb8b14
8224660: Parallel GC: Use WorkGang (2: MarksFromRootsTask)
lkorinth
parents:
57767
diff
changeset
|
2084 |
ParCompactionManager* cm = ParCompactionManager::gc_thread_compaction_manager(_worker_id); |
fc82b6cb8b14
8224660: Parallel GC: Use WorkGang (2: MarksFromRootsTask)
lkorinth
parents:
57767
diff
changeset
|
2085 |
|
fc82b6cb8b14
8224660: Parallel GC: Use WorkGang (2: MarksFromRootsTask)
lkorinth
parents:
57767
diff
changeset
|
2086 |
PCMarkAndPushClosure mark_and_push_closure(cm); |
fc82b6cb8b14
8224660: Parallel GC: Use WorkGang (2: MarksFromRootsTask)
lkorinth
parents:
57767
diff
changeset
|
2087 |
MarkingCodeBlobClosure mark_and_push_in_blobs(&mark_and_push_closure, !CodeBlobToOopClosure::FixRelocations); |
fc82b6cb8b14
8224660: Parallel GC: Use WorkGang (2: MarksFromRootsTask)
lkorinth
parents:
57767
diff
changeset
|
2088 |
|
fc82b6cb8b14
8224660: Parallel GC: Use WorkGang (2: MarksFromRootsTask)
lkorinth
parents:
57767
diff
changeset
|
2089 |
thread->oops_do(&mark_and_push_closure, &mark_and_push_in_blobs); |
fc82b6cb8b14
8224660: Parallel GC: Use WorkGang (2: MarksFromRootsTask)
lkorinth
parents:
57767
diff
changeset
|
2090 |
|
fc82b6cb8b14
8224660: Parallel GC: Use WorkGang (2: MarksFromRootsTask)
lkorinth
parents:
57767
diff
changeset
|
2091 |
// Do the real work |
fc82b6cb8b14
8224660: Parallel GC: Use WorkGang (2: MarksFromRootsTask)
lkorinth
parents:
57767
diff
changeset
|
2092 |
cm->follow_marking_stacks(); |
50058
f7e564cacfbc
8202649: Move the Parallel GC specific task creation functions out of Threads
stefank
parents:
50049
diff
changeset
|
2093 |
} |
f7e564cacfbc
8202649: Move the Parallel GC specific task creation functions out of Threads
stefank
parents:
50049
diff
changeset
|
2094 |
}; |
f7e564cacfbc
8202649: Move the Parallel GC specific task creation functions out of Threads
stefank
parents:
50049
diff
changeset
|
2095 |
|
57768
fc82b6cb8b14
8224660: Parallel GC: Use WorkGang (2: MarksFromRootsTask)
lkorinth
parents:
57767
diff
changeset
|
2096 |
static void mark_from_roots_work(ParallelRootType::Value root_type, uint worker_id) { |
fc82b6cb8b14
8224660: Parallel GC: Use WorkGang (2: MarksFromRootsTask)
lkorinth
parents:
57767
diff
changeset
|
2097 |
assert(ParallelScavengeHeap::heap()->is_gc_active(), "called outside gc"); |
fc82b6cb8b14
8224660: Parallel GC: Use WorkGang (2: MarksFromRootsTask)
lkorinth
parents:
57767
diff
changeset
|
2098 |
|
fc82b6cb8b14
8224660: Parallel GC: Use WorkGang (2: MarksFromRootsTask)
lkorinth
parents:
57767
diff
changeset
|
2099 |
ParCompactionManager* cm = |
fc82b6cb8b14
8224660: Parallel GC: Use WorkGang (2: MarksFromRootsTask)
lkorinth
parents:
57767
diff
changeset
|
2100 |
ParCompactionManager::gc_thread_compaction_manager(worker_id); |
fc82b6cb8b14
8224660: Parallel GC: Use WorkGang (2: MarksFromRootsTask)
lkorinth
parents:
57767
diff
changeset
|
2101 |
PCMarkAndPushClosure mark_and_push_closure(cm); |
fc82b6cb8b14
8224660: Parallel GC: Use WorkGang (2: MarksFromRootsTask)
lkorinth
parents:
57767
diff
changeset
|
2102 |
|
fc82b6cb8b14
8224660: Parallel GC: Use WorkGang (2: MarksFromRootsTask)
lkorinth
parents:
57767
diff
changeset
|
2103 |
switch (root_type) { |
fc82b6cb8b14
8224660: Parallel GC: Use WorkGang (2: MarksFromRootsTask)
lkorinth
parents:
57767
diff
changeset
|
2104 |
case ParallelRootType::universe: |
fc82b6cb8b14
8224660: Parallel GC: Use WorkGang (2: MarksFromRootsTask)
lkorinth
parents:
57767
diff
changeset
|
2105 |
Universe::oops_do(&mark_and_push_closure); |
fc82b6cb8b14
8224660: Parallel GC: Use WorkGang (2: MarksFromRootsTask)
lkorinth
parents:
57767
diff
changeset
|
2106 |
break; |
fc82b6cb8b14
8224660: Parallel GC: Use WorkGang (2: MarksFromRootsTask)
lkorinth
parents:
57767
diff
changeset
|
2107 |
|
fc82b6cb8b14
8224660: Parallel GC: Use WorkGang (2: MarksFromRootsTask)
lkorinth
parents:
57767
diff
changeset
|
2108 |
case ParallelRootType::jni_handles: |
fc82b6cb8b14
8224660: Parallel GC: Use WorkGang (2: MarksFromRootsTask)
lkorinth
parents:
57767
diff
changeset
|
2109 |
JNIHandles::oops_do(&mark_and_push_closure); |
fc82b6cb8b14
8224660: Parallel GC: Use WorkGang (2: MarksFromRootsTask)
lkorinth
parents:
57767
diff
changeset
|
2110 |
break; |
fc82b6cb8b14
8224660: Parallel GC: Use WorkGang (2: MarksFromRootsTask)
lkorinth
parents:
57767
diff
changeset
|
2111 |
|
fc82b6cb8b14
8224660: Parallel GC: Use WorkGang (2: MarksFromRootsTask)
lkorinth
parents:
57767
diff
changeset
|
2112 |
case ParallelRootType::object_synchronizer: |
fc82b6cb8b14
8224660: Parallel GC: Use WorkGang (2: MarksFromRootsTask)
lkorinth
parents:
57767
diff
changeset
|
2113 |
ObjectSynchronizer::oops_do(&mark_and_push_closure); |
fc82b6cb8b14
8224660: Parallel GC: Use WorkGang (2: MarksFromRootsTask)
lkorinth
parents:
57767
diff
changeset
|
2114 |
break; |
fc82b6cb8b14
8224660: Parallel GC: Use WorkGang (2: MarksFromRootsTask)
lkorinth
parents:
57767
diff
changeset
|
2115 |
|
fc82b6cb8b14
8224660: Parallel GC: Use WorkGang (2: MarksFromRootsTask)
lkorinth
parents:
57767
diff
changeset
|
2116 |
case ParallelRootType::management: |
fc82b6cb8b14
8224660: Parallel GC: Use WorkGang (2: MarksFromRootsTask)
lkorinth
parents:
57767
diff
changeset
|
2117 |
Management::oops_do(&mark_and_push_closure); |
fc82b6cb8b14
8224660: Parallel GC: Use WorkGang (2: MarksFromRootsTask)
lkorinth
parents:
57767
diff
changeset
|
2118 |
break; |
fc82b6cb8b14
8224660: Parallel GC: Use WorkGang (2: MarksFromRootsTask)
lkorinth
parents:
57767
diff
changeset
|
2119 |
|
fc82b6cb8b14
8224660: Parallel GC: Use WorkGang (2: MarksFromRootsTask)
lkorinth
parents:
57767
diff
changeset
|
2120 |
case ParallelRootType::jvmti: |
fc82b6cb8b14
8224660: Parallel GC: Use WorkGang (2: MarksFromRootsTask)
lkorinth
parents:
57767
diff
changeset
|
2121 |
JvmtiExport::oops_do(&mark_and_push_closure); |
fc82b6cb8b14
8224660: Parallel GC: Use WorkGang (2: MarksFromRootsTask)
lkorinth
parents:
57767
diff
changeset
|
2122 |
break; |
fc82b6cb8b14
8224660: Parallel GC: Use WorkGang (2: MarksFromRootsTask)
lkorinth
parents:
57767
diff
changeset
|
2123 |
|
fc82b6cb8b14
8224660: Parallel GC: Use WorkGang (2: MarksFromRootsTask)
lkorinth
parents:
57767
diff
changeset
|
2124 |
case ParallelRootType::system_dictionary: |
fc82b6cb8b14
8224660: Parallel GC: Use WorkGang (2: MarksFromRootsTask)
lkorinth
parents:
57767
diff
changeset
|
2125 |
SystemDictionary::oops_do(&mark_and_push_closure); |
fc82b6cb8b14
8224660: Parallel GC: Use WorkGang (2: MarksFromRootsTask)
lkorinth
parents:
57767
diff
changeset
|
2126 |
break; |
fc82b6cb8b14
8224660: Parallel GC: Use WorkGang (2: MarksFromRootsTask)
lkorinth
parents:
57767
diff
changeset
|
2127 |
|
fc82b6cb8b14
8224660: Parallel GC: Use WorkGang (2: MarksFromRootsTask)
lkorinth
parents:
57767
diff
changeset
|
2128 |
case ParallelRootType::class_loader_data: |
fc82b6cb8b14
8224660: Parallel GC: Use WorkGang (2: MarksFromRootsTask)
lkorinth
parents:
57767
diff
changeset
|
2129 |
{ |
fc82b6cb8b14
8224660: Parallel GC: Use WorkGang (2: MarksFromRootsTask)
lkorinth
parents:
57767
diff
changeset
|
2130 |
CLDToOopClosure cld_closure(&mark_and_push_closure, ClassLoaderData::_claim_strong); |
fc82b6cb8b14
8224660: Parallel GC: Use WorkGang (2: MarksFromRootsTask)
lkorinth
parents:
57767
diff
changeset
|
2131 |
ClassLoaderDataGraph::always_strong_cld_do(&cld_closure); |
fc82b6cb8b14
8224660: Parallel GC: Use WorkGang (2: MarksFromRootsTask)
lkorinth
parents:
57767
diff
changeset
|
2132 |
} |
fc82b6cb8b14
8224660: Parallel GC: Use WorkGang (2: MarksFromRootsTask)
lkorinth
parents:
57767
diff
changeset
|
2133 |
break; |
fc82b6cb8b14
8224660: Parallel GC: Use WorkGang (2: MarksFromRootsTask)
lkorinth
parents:
57767
diff
changeset
|
2134 |
|
fc82b6cb8b14
8224660: Parallel GC: Use WorkGang (2: MarksFromRootsTask)
lkorinth
parents:
57767
diff
changeset
|
2135 |
case ParallelRootType::code_cache: |
fc82b6cb8b14
8224660: Parallel GC: Use WorkGang (2: MarksFromRootsTask)
lkorinth
parents:
57767
diff
changeset
|
2136 |
// Do not treat nmethods as strong roots for mark/sweep, since we can unload them. |
fc82b6cb8b14
8224660: Parallel GC: Use WorkGang (2: MarksFromRootsTask)
lkorinth
parents:
57767
diff
changeset
|
2137 |
//ScavengableNMethods::scavengable_nmethods_do(CodeBlobToOopClosure(&mark_and_push_closure)); |
fc82b6cb8b14
8224660: Parallel GC: Use WorkGang (2: MarksFromRootsTask)
lkorinth
parents:
57767
diff
changeset
|
2138 |
AOTLoader::oops_do(&mark_and_push_closure); |
fc82b6cb8b14
8224660: Parallel GC: Use WorkGang (2: MarksFromRootsTask)
lkorinth
parents:
57767
diff
changeset
|
2139 |
break; |
fc82b6cb8b14
8224660: Parallel GC: Use WorkGang (2: MarksFromRootsTask)
lkorinth
parents:
57767
diff
changeset
|
2140 |
|
fc82b6cb8b14
8224660: Parallel GC: Use WorkGang (2: MarksFromRootsTask)
lkorinth
parents:
57767
diff
changeset
|
2141 |
case ParallelRootType::sentinel: |
fc82b6cb8b14
8224660: Parallel GC: Use WorkGang (2: MarksFromRootsTask)
lkorinth
parents:
57767
diff
changeset
|
2142 |
DEBUG_ONLY(default:) // DEBUG_ONLY hack will create compile error on release builds (-Wswitch) and runtime check on debug builds |
fc82b6cb8b14
8224660: Parallel GC: Use WorkGang (2: MarksFromRootsTask)
lkorinth
parents:
57767
diff
changeset
|
2143 |
fatal("Bad enumeration value: %u", root_type); |
fc82b6cb8b14
8224660: Parallel GC: Use WorkGang (2: MarksFromRootsTask)
lkorinth
parents:
57767
diff
changeset
|
2144 |
break; |
fc82b6cb8b14
8224660: Parallel GC: Use WorkGang (2: MarksFromRootsTask)
lkorinth
parents:
57767
diff
changeset
|
2145 |
} |
fc82b6cb8b14
8224660: Parallel GC: Use WorkGang (2: MarksFromRootsTask)
lkorinth
parents:
57767
diff
changeset
|
2146 |
|
fc82b6cb8b14
8224660: Parallel GC: Use WorkGang (2: MarksFromRootsTask)
lkorinth
parents:
57767
diff
changeset
|
2147 |
// Do the real work |
fc82b6cb8b14
8224660: Parallel GC: Use WorkGang (2: MarksFromRootsTask)
lkorinth
parents:
57767
diff
changeset
|
2148 |
cm->follow_marking_stacks(); |
fc82b6cb8b14
8224660: Parallel GC: Use WorkGang (2: MarksFromRootsTask)
lkorinth
parents:
57767
diff
changeset
|
2149 |
} |
fc82b6cb8b14
8224660: Parallel GC: Use WorkGang (2: MarksFromRootsTask)
lkorinth
parents:
57767
diff
changeset
|
2150 |
|
57767
b3e44e1b135d
8224659: Parallel GC: Use WorkGang (1: PCRefProcTask)
lkorinth
parents:
57662
diff
changeset
|
2151 |
static void steal_marking_work(ParallelTaskTerminator& terminator, uint worker_id) { |
b3e44e1b135d
8224659: Parallel GC: Use WorkGang (1: PCRefProcTask)
lkorinth
parents:
57662
diff
changeset
|
2152 |
assert(ParallelScavengeHeap::heap()->is_gc_active(), "called outside gc"); |
b3e44e1b135d
8224659: Parallel GC: Use WorkGang (1: PCRefProcTask)
lkorinth
parents:
57662
diff
changeset
|
2153 |
|
b3e44e1b135d
8224659: Parallel GC: Use WorkGang (1: PCRefProcTask)
lkorinth
parents:
57662
diff
changeset
|
2154 |
ParCompactionManager* cm = |
b3e44e1b135d
8224659: Parallel GC: Use WorkGang (1: PCRefProcTask)
lkorinth
parents:
57662
diff
changeset
|
2155 |
ParCompactionManager::gc_thread_compaction_manager(worker_id); |
b3e44e1b135d
8224659: Parallel GC: Use WorkGang (1: PCRefProcTask)
lkorinth
parents:
57662
diff
changeset
|
2156 |
|
b3e44e1b135d
8224659: Parallel GC: Use WorkGang (1: PCRefProcTask)
lkorinth
parents:
57662
diff
changeset
|
2157 |
oop obj = NULL; |
b3e44e1b135d
8224659: Parallel GC: Use WorkGang (1: PCRefProcTask)
lkorinth
parents:
57662
diff
changeset
|
2158 |
ObjArrayTask task; |
b3e44e1b135d
8224659: Parallel GC: Use WorkGang (1: PCRefProcTask)
lkorinth
parents:
57662
diff
changeset
|
2159 |
do { |
b3e44e1b135d
8224659: Parallel GC: Use WorkGang (1: PCRefProcTask)
lkorinth
parents:
57662
diff
changeset
|
2160 |
while (ParCompactionManager::steal_objarray(worker_id, task)) { |
b3e44e1b135d
8224659: Parallel GC: Use WorkGang (1: PCRefProcTask)
lkorinth
parents:
57662
diff
changeset
|
2161 |
cm->follow_array((objArrayOop)task.obj(), task.index()); |
b3e44e1b135d
8224659: Parallel GC: Use WorkGang (1: PCRefProcTask)
lkorinth
parents:
57662
diff
changeset
|
2162 |
cm->follow_marking_stacks(); |
b3e44e1b135d
8224659: Parallel GC: Use WorkGang (1: PCRefProcTask)
lkorinth
parents:
57662
diff
changeset
|
2163 |
} |
b3e44e1b135d
8224659: Parallel GC: Use WorkGang (1: PCRefProcTask)
lkorinth
parents:
57662
diff
changeset
|
2164 |
while (ParCompactionManager::steal(worker_id, obj)) { |
b3e44e1b135d
8224659: Parallel GC: Use WorkGang (1: PCRefProcTask)
lkorinth
parents:
57662
diff
changeset
|
2165 |
cm->follow_contents(obj); |
b3e44e1b135d
8224659: Parallel GC: Use WorkGang (1: PCRefProcTask)
lkorinth
parents:
57662
diff
changeset
|
2166 |
cm->follow_marking_stacks(); |
b3e44e1b135d
8224659: Parallel GC: Use WorkGang (1: PCRefProcTask)
lkorinth
parents:
57662
diff
changeset
|
2167 |
} |
b3e44e1b135d
8224659: Parallel GC: Use WorkGang (1: PCRefProcTask)
lkorinth
parents:
57662
diff
changeset
|
2168 |
} while (!terminator.offer_termination()); |
b3e44e1b135d
8224659: Parallel GC: Use WorkGang (1: PCRefProcTask)
lkorinth
parents:
57662
diff
changeset
|
2169 |
} |
b3e44e1b135d
8224659: Parallel GC: Use WorkGang (1: PCRefProcTask)
lkorinth
parents:
57662
diff
changeset
|
2170 |
|
57768
fc82b6cb8b14
8224660: Parallel GC: Use WorkGang (2: MarksFromRootsTask)
lkorinth
parents:
57767
diff
changeset
|
2171 |
class MarkFromRootsTask : public AbstractGangTask { |
fc82b6cb8b14
8224660: Parallel GC: Use WorkGang (2: MarksFromRootsTask)
lkorinth
parents:
57767
diff
changeset
|
2172 |
typedef AbstractRefProcTaskExecutor::ProcessTask ProcessTask; |
fc82b6cb8b14
8224660: Parallel GC: Use WorkGang (2: MarksFromRootsTask)
lkorinth
parents:
57767
diff
changeset
|
2173 |
StrongRootsScope _strong_roots_scope; // needed for Threads::possibly_parallel_threads_do |
fc82b6cb8b14
8224660: Parallel GC: Use WorkGang (2: MarksFromRootsTask)
lkorinth
parents:
57767
diff
changeset
|
2174 |
SequentialSubTasksDone _subtasks; |
fc82b6cb8b14
8224660: Parallel GC: Use WorkGang (2: MarksFromRootsTask)
lkorinth
parents:
57767
diff
changeset
|
2175 |
TaskTerminator _terminator; |
fc82b6cb8b14
8224660: Parallel GC: Use WorkGang (2: MarksFromRootsTask)
lkorinth
parents:
57767
diff
changeset
|
2176 |
uint _active_workers; |
fc82b6cb8b14
8224660: Parallel GC: Use WorkGang (2: MarksFromRootsTask)
lkorinth
parents:
57767
diff
changeset
|
2177 |
|
fc82b6cb8b14
8224660: Parallel GC: Use WorkGang (2: MarksFromRootsTask)
lkorinth
parents:
57767
diff
changeset
|
2178 |
public: |
fc82b6cb8b14
8224660: Parallel GC: Use WorkGang (2: MarksFromRootsTask)
lkorinth
parents:
57767
diff
changeset
|
2179 |
MarkFromRootsTask(uint active_workers) : |
fc82b6cb8b14
8224660: Parallel GC: Use WorkGang (2: MarksFromRootsTask)
lkorinth
parents:
57767
diff
changeset
|
2180 |
AbstractGangTask("MarkFromRootsTask"), |
fc82b6cb8b14
8224660: Parallel GC: Use WorkGang (2: MarksFromRootsTask)
lkorinth
parents:
57767
diff
changeset
|
2181 |
_strong_roots_scope(active_workers), |
fc82b6cb8b14
8224660: Parallel GC: Use WorkGang (2: MarksFromRootsTask)
lkorinth
parents:
57767
diff
changeset
|
2182 |
_subtasks(), |
fc82b6cb8b14
8224660: Parallel GC: Use WorkGang (2: MarksFromRootsTask)
lkorinth
parents:
57767
diff
changeset
|
2183 |
_terminator(active_workers, ParCompactionManager::stack_array()), |
fc82b6cb8b14
8224660: Parallel GC: Use WorkGang (2: MarksFromRootsTask)
lkorinth
parents:
57767
diff
changeset
|
2184 |
_active_workers(active_workers) { |
fc82b6cb8b14
8224660: Parallel GC: Use WorkGang (2: MarksFromRootsTask)
lkorinth
parents:
57767
diff
changeset
|
2185 |
_subtasks.set_n_threads(active_workers); |
fc82b6cb8b14
8224660: Parallel GC: Use WorkGang (2: MarksFromRootsTask)
lkorinth
parents:
57767
diff
changeset
|
2186 |
_subtasks.set_n_tasks(ParallelRootType::sentinel); |
fc82b6cb8b14
8224660: Parallel GC: Use WorkGang (2: MarksFromRootsTask)
lkorinth
parents:
57767
diff
changeset
|
2187 |
} |
fc82b6cb8b14
8224660: Parallel GC: Use WorkGang (2: MarksFromRootsTask)
lkorinth
parents:
57767
diff
changeset
|
2188 |
|
fc82b6cb8b14
8224660: Parallel GC: Use WorkGang (2: MarksFromRootsTask)
lkorinth
parents:
57767
diff
changeset
|
2189 |
virtual void work(uint worker_id) { |
fc82b6cb8b14
8224660: Parallel GC: Use WorkGang (2: MarksFromRootsTask)
lkorinth
parents:
57767
diff
changeset
|
2190 |
for (uint task = 0; _subtasks.try_claim_task(task); /*empty*/ ) { |
fc82b6cb8b14
8224660: Parallel GC: Use WorkGang (2: MarksFromRootsTask)
lkorinth
parents:
57767
diff
changeset
|
2191 |
mark_from_roots_work(static_cast<ParallelRootType::Value>(task), worker_id); |
fc82b6cb8b14
8224660: Parallel GC: Use WorkGang (2: MarksFromRootsTask)
lkorinth
parents:
57767
diff
changeset
|
2192 |
} |
fc82b6cb8b14
8224660: Parallel GC: Use WorkGang (2: MarksFromRootsTask)
lkorinth
parents:
57767
diff
changeset
|
2193 |
_subtasks.all_tasks_completed(); |
fc82b6cb8b14
8224660: Parallel GC: Use WorkGang (2: MarksFromRootsTask)
lkorinth
parents:
57767
diff
changeset
|
2194 |
|
fc82b6cb8b14
8224660: Parallel GC: Use WorkGang (2: MarksFromRootsTask)
lkorinth
parents:
57767
diff
changeset
|
2195 |
PCAddThreadRootsMarkingTaskClosure closure(worker_id); |
fc82b6cb8b14
8224660: Parallel GC: Use WorkGang (2: MarksFromRootsTask)
lkorinth
parents:
57767
diff
changeset
|
2196 |
Threads::possibly_parallel_threads_do(true /*parallel */, &closure); |
fc82b6cb8b14
8224660: Parallel GC: Use WorkGang (2: MarksFromRootsTask)
lkorinth
parents:
57767
diff
changeset
|
2197 |
|
fc82b6cb8b14
8224660: Parallel GC: Use WorkGang (2: MarksFromRootsTask)
lkorinth
parents:
57767
diff
changeset
|
2198 |
if (_active_workers > 1) { |
fc82b6cb8b14
8224660: Parallel GC: Use WorkGang (2: MarksFromRootsTask)
lkorinth
parents:
57767
diff
changeset
|
2199 |
steal_marking_work(*_terminator.terminator(), worker_id); |
fc82b6cb8b14
8224660: Parallel GC: Use WorkGang (2: MarksFromRootsTask)
lkorinth
parents:
57767
diff
changeset
|
2200 |
} |
fc82b6cb8b14
8224660: Parallel GC: Use WorkGang (2: MarksFromRootsTask)
lkorinth
parents:
57767
diff
changeset
|
2201 |
} |
fc82b6cb8b14
8224660: Parallel GC: Use WorkGang (2: MarksFromRootsTask)
lkorinth
parents:
57767
diff
changeset
|
2202 |
}; |
fc82b6cb8b14
8224660: Parallel GC: Use WorkGang (2: MarksFromRootsTask)
lkorinth
parents:
57767
diff
changeset
|
2203 |
|
57767
b3e44e1b135d
8224659: Parallel GC: Use WorkGang (1: PCRefProcTask)
lkorinth
parents:
57662
diff
changeset
|
2204 |
class PCRefProcTask : public AbstractGangTask { |
b3e44e1b135d
8224659: Parallel GC: Use WorkGang (1: PCRefProcTask)
lkorinth
parents:
57662
diff
changeset
|
2205 |
typedef AbstractRefProcTaskExecutor::ProcessTask ProcessTask; |
b3e44e1b135d
8224659: Parallel GC: Use WorkGang (1: PCRefProcTask)
lkorinth
parents:
57662
diff
changeset
|
2206 |
ProcessTask& _task; |
b3e44e1b135d
8224659: Parallel GC: Use WorkGang (1: PCRefProcTask)
lkorinth
parents:
57662
diff
changeset
|
2207 |
uint _ergo_workers; |
b3e44e1b135d
8224659: Parallel GC: Use WorkGang (1: PCRefProcTask)
lkorinth
parents:
57662
diff
changeset
|
2208 |
TaskTerminator _terminator; |
b3e44e1b135d
8224659: Parallel GC: Use WorkGang (1: PCRefProcTask)
lkorinth
parents:
57662
diff
changeset
|
2209 |
|
b3e44e1b135d
8224659: Parallel GC: Use WorkGang (1: PCRefProcTask)
lkorinth
parents:
57662
diff
changeset
|
2210 |
public: |
b3e44e1b135d
8224659: Parallel GC: Use WorkGang (1: PCRefProcTask)
lkorinth
parents:
57662
diff
changeset
|
2211 |
PCRefProcTask(ProcessTask& task, uint ergo_workers) : |
b3e44e1b135d
8224659: Parallel GC: Use WorkGang (1: PCRefProcTask)
lkorinth
parents:
57662
diff
changeset
|
2212 |
AbstractGangTask("PCRefProcTask"), |
b3e44e1b135d
8224659: Parallel GC: Use WorkGang (1: PCRefProcTask)
lkorinth
parents:
57662
diff
changeset
|
2213 |
_task(task), |
b3e44e1b135d
8224659: Parallel GC: Use WorkGang (1: PCRefProcTask)
lkorinth
parents:
57662
diff
changeset
|
2214 |
_ergo_workers(ergo_workers), |
b3e44e1b135d
8224659: Parallel GC: Use WorkGang (1: PCRefProcTask)
lkorinth
parents:
57662
diff
changeset
|
2215 |
_terminator(_ergo_workers, ParCompactionManager::stack_array()) { |
b3e44e1b135d
8224659: Parallel GC: Use WorkGang (1: PCRefProcTask)
lkorinth
parents:
57662
diff
changeset
|
2216 |
} |
b3e44e1b135d
8224659: Parallel GC: Use WorkGang (1: PCRefProcTask)
lkorinth
parents:
57662
diff
changeset
|
2217 |
|
b3e44e1b135d
8224659: Parallel GC: Use WorkGang (1: PCRefProcTask)
lkorinth
parents:
57662
diff
changeset
|
2218 |
virtual void work(uint worker_id) { |
b3e44e1b135d
8224659: Parallel GC: Use WorkGang (1: PCRefProcTask)
lkorinth
parents:
57662
diff
changeset
|
2219 |
ParallelScavengeHeap* heap = ParallelScavengeHeap::heap(); |
b3e44e1b135d
8224659: Parallel GC: Use WorkGang (1: PCRefProcTask)
lkorinth
parents:
57662
diff
changeset
|
2220 |
assert(ParallelScavengeHeap::heap()->is_gc_active(), "called outside gc"); |
b3e44e1b135d
8224659: Parallel GC: Use WorkGang (1: PCRefProcTask)
lkorinth
parents:
57662
diff
changeset
|
2221 |
|
b3e44e1b135d
8224659: Parallel GC: Use WorkGang (1: PCRefProcTask)
lkorinth
parents:
57662
diff
changeset
|
2222 |
ParCompactionManager* cm = |
b3e44e1b135d
8224659: Parallel GC: Use WorkGang (1: PCRefProcTask)
lkorinth
parents:
57662
diff
changeset
|
2223 |
ParCompactionManager::gc_thread_compaction_manager(worker_id); |
b3e44e1b135d
8224659: Parallel GC: Use WorkGang (1: PCRefProcTask)
lkorinth
parents:
57662
diff
changeset
|
2224 |
PCMarkAndPushClosure mark_and_push_closure(cm); |
b3e44e1b135d
8224659: Parallel GC: Use WorkGang (1: PCRefProcTask)
lkorinth
parents:
57662
diff
changeset
|
2225 |
ParCompactionManager::FollowStackClosure follow_stack_closure(cm); |
b3e44e1b135d
8224659: Parallel GC: Use WorkGang (1: PCRefProcTask)
lkorinth
parents:
57662
diff
changeset
|
2226 |
_task.work(worker_id, *PSParallelCompact::is_alive_closure(), |
b3e44e1b135d
8224659: Parallel GC: Use WorkGang (1: PCRefProcTask)
lkorinth
parents:
57662
diff
changeset
|
2227 |
mark_and_push_closure, follow_stack_closure); |
b3e44e1b135d
8224659: Parallel GC: Use WorkGang (1: PCRefProcTask)
lkorinth
parents:
57662
diff
changeset
|
2228 |
|
b3e44e1b135d
8224659: Parallel GC: Use WorkGang (1: PCRefProcTask)
lkorinth
parents:
57662
diff
changeset
|
2229 |
steal_marking_work(*_terminator.terminator(), worker_id); |
b3e44e1b135d
8224659: Parallel GC: Use WorkGang (1: PCRefProcTask)
lkorinth
parents:
57662
diff
changeset
|
2230 |
} |
b3e44e1b135d
8224659: Parallel GC: Use WorkGang (1: PCRefProcTask)
lkorinth
parents:
57662
diff
changeset
|
2231 |
}; |
b3e44e1b135d
8224659: Parallel GC: Use WorkGang (1: PCRefProcTask)
lkorinth
parents:
57662
diff
changeset
|
2232 |
|
b3e44e1b135d
8224659: Parallel GC: Use WorkGang (1: PCRefProcTask)
lkorinth
parents:
57662
diff
changeset
|
2233 |
class RefProcTaskExecutor: public AbstractRefProcTaskExecutor { |
b3e44e1b135d
8224659: Parallel GC: Use WorkGang (1: PCRefProcTask)
lkorinth
parents:
57662
diff
changeset
|
2234 |
void execute(ProcessTask& process_task, uint ergo_workers) { |
b3e44e1b135d
8224659: Parallel GC: Use WorkGang (1: PCRefProcTask)
lkorinth
parents:
57662
diff
changeset
|
2235 |
assert(ParallelScavengeHeap::heap()->workers().active_workers() == ergo_workers, |
b3e44e1b135d
8224659: Parallel GC: Use WorkGang (1: PCRefProcTask)
lkorinth
parents:
57662
diff
changeset
|
2236 |
"Ergonomically chosen workers (%u) must be equal to active workers (%u)", |
b3e44e1b135d
8224659: Parallel GC: Use WorkGang (1: PCRefProcTask)
lkorinth
parents:
57662
diff
changeset
|
2237 |
ergo_workers, ParallelScavengeHeap::heap()->workers().active_workers()); |
b3e44e1b135d
8224659: Parallel GC: Use WorkGang (1: PCRefProcTask)
lkorinth
parents:
57662
diff
changeset
|
2238 |
|
b3e44e1b135d
8224659: Parallel GC: Use WorkGang (1: PCRefProcTask)
lkorinth
parents:
57662
diff
changeset
|
2239 |
PCRefProcTask task(process_task, ergo_workers); |
b3e44e1b135d
8224659: Parallel GC: Use WorkGang (1: PCRefProcTask)
lkorinth
parents:
57662
diff
changeset
|
2240 |
ParallelScavengeHeap::heap()->workers().run_task(&task); |
b3e44e1b135d
8224659: Parallel GC: Use WorkGang (1: PCRefProcTask)
lkorinth
parents:
57662
diff
changeset
|
2241 |
} |
b3e44e1b135d
8224659: Parallel GC: Use WorkGang (1: PCRefProcTask)
lkorinth
parents:
57662
diff
changeset
|
2242 |
}; |
b3e44e1b135d
8224659: Parallel GC: Use WorkGang (1: PCRefProcTask)
lkorinth
parents:
57662
diff
changeset
|
2243 |
|
1 | 2244 |
void PSParallelCompact::marking_phase(ParCompactionManager* cm, |
18025 | 2245 |
bool maximum_heap_compaction, |
2246 |
ParallelOldTracer *gc_tracer) { |
|
1 | 2247 |
// Recursively traverse all live objects and mark them |
37146 | 2248 |
GCTraceTime(Info, gc, phases) tm("Marking Phase", &_gc_timer); |
1 | 2249 |
|
30173
13cf7580b000
8077413: Avoid use of Universe::heap() inside collectors
pliden
parents:
30150
diff
changeset
|
2250 |
ParallelScavengeHeap* heap = ParallelScavengeHeap::heap(); |
57773
5cbc3bd9fdfd
8224665: Parallel GC: Use WorkGang (7: remove task manager)
lkorinth
parents:
57769
diff
changeset
|
2251 |
uint active_gc_threads = ParallelScavengeHeap::heap()->workers().active_workers(); |
1 | 2252 |
|
52118
49f627781c2a
8211446: Replace oop_pc_follow_contents with oop_iterate and closure
lkorinth
parents:
51978
diff
changeset
|
2253 |
PCMarkAndPushClosure mark_and_push_closure(cm); |
30556
750fee2bdb45
8078345: Move PSParallelCompact::mark_and_push to ParCompactionManager
stefank
parents:
30555
diff
changeset
|
2254 |
ParCompactionManager::FollowStackClosure follow_stack_closure(cm); |
1 | 2255 |
|
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13195
diff
changeset
|
2256 |
// Need new claim bits before marking starts. |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13195
diff
changeset
|
2257 |
ClassLoaderDataGraph::clear_claimed_marks(); |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13195
diff
changeset
|
2258 |
|
1 | 2259 |
{ |
37146 | 2260 |
GCTraceTime(Debug, gc, phases) tm("Par Mark", &_gc_timer); |
18025 | 2261 |
|
57768
fc82b6cb8b14
8224660: Parallel GC: Use WorkGang (2: MarksFromRootsTask)
lkorinth
parents:
57767
diff
changeset
|
2262 |
MarkFromRootsTask task(active_gc_threads); |
fc82b6cb8b14
8224660: Parallel GC: Use WorkGang (2: MarksFromRootsTask)
lkorinth
parents:
57767
diff
changeset
|
2263 |
ParallelScavengeHeap::heap()->workers().run_task(&task); |
1 | 2264 |
} |
2265 |
||
2266 |
// Process reference objects found during marking |
|
2267 |
{ |
|
37146 | 2268 |
GCTraceTime(Debug, gc, phases) tm("Reference Processing", &_gc_timer); |
18025 | 2269 |
|
2270 |
ReferenceProcessorStats stats; |
|
50396
7f48bff40a9a
8204094: assert(worker_i < _length) failed: Worker 15 is greater than max: 11 at ReferenceProcessorPhaseTimes
sangheki
parents:
50297
diff
changeset
|
2271 |
ReferenceProcessorPhaseTimes pt(&_gc_timer, ref_processor()->max_num_queues()); |
50500
ade54c345982
8204617: ParallelGC parallel reference processing does not set MT degree in reference processor
tschatzl
parents:
50396
diff
changeset
|
2272 |
|
1 | 2273 |
if (ref_processor()->processing_is_mt()) { |
50500
ade54c345982
8204617: ParallelGC parallel reference processing does not set MT degree in reference processor
tschatzl
parents:
50396
diff
changeset
|
2274 |
ref_processor()->set_active_mt_degree(active_gc_threads); |
ade54c345982
8204617: ParallelGC parallel reference processing does not set MT degree in reference processor
tschatzl
parents:
50396
diff
changeset
|
2275 |
|
1 | 2276 |
RefProcTaskExecutor task_executor; |
18025 | 2277 |
stats = ref_processor()->process_discovered_references( |
1606
dcf9714addbe
6684579: SoftReference processing can be made more efficient
ysr
parents:
1408
diff
changeset
|
2278 |
is_alive_closure(), &mark_and_push_closure, &follow_stack_closure, |
46795
623a5e42deb6
8173335: Improve logging for j.l.ref.reference processing
sangheki
parents:
46701
diff
changeset
|
2279 |
&task_executor, &pt); |
1 | 2280 |
} else { |
18025 | 2281 |
stats = ref_processor()->process_discovered_references( |
2282 |
is_alive_closure(), &mark_and_push_closure, &follow_stack_closure, NULL, |
|
46795
623a5e42deb6
8173335: Improve logging for j.l.ref.reference processing
sangheki
parents:
46701
diff
changeset
|
2283 |
&pt); |
1 | 2284 |
} |
18025 | 2285 |
|
2286 |
gc_tracer->report_gc_reference_stats(stats); |
|
46795
623a5e42deb6
8173335: Improve logging for j.l.ref.reference processing
sangheki
parents:
46701
diff
changeset
|
2287 |
pt.print_all_references(); |
1 | 2288 |
} |
2289 |
||
47676
b1c020fc35a3
8189748: More precise closures for WeakProcessor::weak_oops_do calls
stefank
parents:
47648
diff
changeset
|
2290 |
// This is the point where the entire marking should have completed. |
b1c020fc35a3
8189748: More precise closures for WeakProcessor::weak_oops_do calls
stefank
parents:
47648
diff
changeset
|
2291 |
assert(cm->marking_stacks_empty(), "Marking should have completed"); |
b1c020fc35a3
8189748: More precise closures for WeakProcessor::weak_oops_do calls
stefank
parents:
47648
diff
changeset
|
2292 |
|
47648
226b1fc611b9
8189359: Move native weak oops cleaning out of ReferenceProcessor
stefank
parents:
47634
diff
changeset
|
2293 |
{ |
226b1fc611b9
8189359: Move native weak oops cleaning out of ReferenceProcessor
stefank
parents:
47634
diff
changeset
|
2294 |
GCTraceTime(Debug, gc, phases) tm("Weak Processing", &_gc_timer); |
47676
b1c020fc35a3
8189748: More precise closures for WeakProcessor::weak_oops_do calls
stefank
parents:
47648
diff
changeset
|
2295 |
WeakProcessor::weak_oops_do(is_alive_closure(), &do_nothing_cl); |
47648
226b1fc611b9
8189359: Move native weak oops cleaning out of ReferenceProcessor
stefank
parents:
47634
diff
changeset
|
2296 |
} |
226b1fc611b9
8189359: Move native weak oops cleaning out of ReferenceProcessor
stefank
parents:
47634
diff
changeset
|
2297 |
|
37140
b62549ead2cf
8027423: Parallel compact GC class unloading measurement includes symbol and string table time
stefank
parents:
37106
diff
changeset
|
2298 |
{ |
37146 | 2299 |
GCTraceTime(Debug, gc, phases) tm_m("Class Unloading", &_gc_timer); |
37140
b62549ead2cf
8027423: Parallel compact GC class unloading measurement includes symbol and string table time
stefank
parents:
37106
diff
changeset
|
2300 |
|
b62549ead2cf
8027423: Parallel compact GC class unloading measurement includes symbol and string table time
stefank
parents:
37106
diff
changeset
|
2301 |
// Follow system dictionary roots and unload classes. |
50297
580744d900c8
8202813: Move vm_weak processing from SystemDictionary to WeakProcessor
coleenp
parents:
50277
diff
changeset
|
2302 |
bool purged_class = SystemDictionary::do_unloading(&_gc_timer); |
37140
b62549ead2cf
8027423: Parallel compact GC class unloading measurement includes symbol and string table time
stefank
parents:
37106
diff
changeset
|
2303 |
|
b62549ead2cf
8027423: Parallel compact GC class unloading measurement includes symbol and string table time
stefank
parents:
37106
diff
changeset
|
2304 |
// Unload nmethods. |
b62549ead2cf
8027423: Parallel compact GC class unloading measurement includes symbol and string table time
stefank
parents:
37106
diff
changeset
|
2305 |
CodeCache::do_unloading(is_alive_closure(), purged_class); |
b62549ead2cf
8027423: Parallel compact GC class unloading measurement includes symbol and string table time
stefank
parents:
37106
diff
changeset
|
2306 |
|
b62549ead2cf
8027423: Parallel compact GC class unloading measurement includes symbol and string table time
stefank
parents:
37106
diff
changeset
|
2307 |
// Prune dead klasses from subklass/sibling/implementor lists. |
49969
8624981f1ffa
8202447: Fix unloading_occurred to mean unloading_occurred
coleenp
parents:
49967
diff
changeset
|
2308 |
Klass::clean_weak_klass_links(purged_class); |
54669
ad45b3802d4e
8220623: [JVMCI] Update JVMCI to support JVMCI based Compiler compiled into shared library
kvn
parents:
54264
diff
changeset
|
2309 |
|
ad45b3802d4e
8220623: [JVMCI] Update JVMCI to support JVMCI based Compiler compiled into shared library
kvn
parents:
54264
diff
changeset
|
2310 |
// Clean JVMCI metadata handles. |
ad45b3802d4e
8220623: [JVMCI] Update JVMCI to support JVMCI based Compiler compiled into shared library
kvn
parents:
54264
diff
changeset
|
2311 |
JVMCI_ONLY(JVMCI::do_unloading(purged_class)); |
37140
b62549ead2cf
8027423: Parallel compact GC class unloading measurement includes symbol and string table time
stefank
parents:
37106
diff
changeset
|
2312 |
} |
b62549ead2cf
8027423: Parallel compact GC class unloading measurement includes symbol and string table time
stefank
parents:
37106
diff
changeset
|
2313 |
|
18025 | 2314 |
_gc_tracer.report_object_count_after_gc(is_alive_closure()); |
1 | 2315 |
} |
2316 |
||
35877
a2a62511d0f8
8146987: Improve Parallel GC Full GC by caching results of live_words_in_range()
tschatzl
parents:
35862
diff
changeset
|
2317 |
void PSParallelCompact::adjust_roots(ParCompactionManager* cm) { |
1 | 2318 |
// Adjust the pointers to reflect the new locations |
37146 | 2319 |
GCTraceTime(Info, gc, phases) tm("Adjust Roots", &_gc_timer); |
1 | 2320 |
|
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13195
diff
changeset
|
2321 |
// Need new claim bits when tracing through and adjusting pointers. |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13195
diff
changeset
|
2322 |
ClassLoaderDataGraph::clear_claimed_marks(); |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13195
diff
changeset
|
2323 |
|
52119
88916200bdd7
8211447: Replace oop_pc_update_pointers with oop_iterate and closure
lkorinth
parents:
52118
diff
changeset
|
2324 |
PCAdjustPointerClosure oop_closure(cm); |
35877
a2a62511d0f8
8146987: Improve Parallel GC Full GC by caching results of live_words_in_range()
tschatzl
parents:
35862
diff
changeset
|
2325 |
|
1 | 2326 |
// General strong roots. |
35877
a2a62511d0f8
8146987: Improve Parallel GC Full GC by caching results of live_words_in_range()
tschatzl
parents:
35862
diff
changeset
|
2327 |
Universe::oops_do(&oop_closure); |
a2a62511d0f8
8146987: Improve Parallel GC Full GC by caching results of live_words_in_range()
tschatzl
parents:
35862
diff
changeset
|
2328 |
JNIHandles::oops_do(&oop_closure); // Global (strong) JNI handles |
38074
8475fdc6dcc3
8154580: Save mirror in interpreter frame to enable cleanups of CLDClosure
coleenp
parents:
37462
diff
changeset
|
2329 |
Threads::oops_do(&oop_closure, NULL); |
35877
a2a62511d0f8
8146987: Improve Parallel GC Full GC by caching results of live_words_in_range()
tschatzl
parents:
35862
diff
changeset
|
2330 |
ObjectSynchronizer::oops_do(&oop_closure); |
a2a62511d0f8
8146987: Improve Parallel GC Full GC by caching results of live_words_in_range()
tschatzl
parents:
35862
diff
changeset
|
2331 |
Management::oops_do(&oop_closure); |
a2a62511d0f8
8146987: Improve Parallel GC Full GC by caching results of live_words_in_range()
tschatzl
parents:
35862
diff
changeset
|
2332 |
JvmtiExport::oops_do(&oop_closure); |
a2a62511d0f8
8146987: Improve Parallel GC Full GC by caching results of live_words_in_range()
tschatzl
parents:
35862
diff
changeset
|
2333 |
SystemDictionary::oops_do(&oop_closure); |
52141
de6dc206a92b
8210330: Make CLD claiming allow multiple claim bits
eosterlund
parents:
52119
diff
changeset
|
2334 |
CLDToOopClosure cld_closure(&oop_closure, ClassLoaderData::_claim_strong); |
51470
84d3126858d5
8209738: Remove ClassLoaderDataGraph::*oops_do functions
coleenp
parents:
51332
diff
changeset
|
2335 |
ClassLoaderDataGraph::cld_do(&cld_closure); |
1 | 2336 |
|
2337 |
// Now adjust pointers in remaining weak roots. (All of which should |
|
2338 |
// have been cleared if they pointed to non-surviving objects.) |
|
47648
226b1fc611b9
8189359: Move native weak oops cleaning out of ReferenceProcessor
stefank
parents:
47634
diff
changeset
|
2339 |
WeakProcessor::oops_do(&oop_closure); |
35877
a2a62511d0f8
8146987: Improve Parallel GC Full GC by caching results of live_words_in_range()
tschatzl
parents:
35862
diff
changeset
|
2340 |
|
a2a62511d0f8
8146987: Improve Parallel GC Full GC by caching results of live_words_in_range()
tschatzl
parents:
35862
diff
changeset
|
2341 |
CodeBlobToOopClosure adjust_from_blobs(&oop_closure, CodeBlobToOopClosure::FixRelocations); |
25492
d27050bdfb04
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
25491
diff
changeset
|
2342 |
CodeCache::blobs_do(&adjust_from_blobs); |
54669
ad45b3802d4e
8220623: [JVMCI] Update JVMCI to support JVMCI based Compiler compiled into shared library
kvn
parents:
54264
diff
changeset
|
2343 |
AOT_ONLY(AOTLoader::oops_do(&oop_closure);) |
ad45b3802d4e
8220623: [JVMCI] Update JVMCI to support JVMCI based Compiler compiled into shared library
kvn
parents:
54264
diff
changeset
|
2344 |
|
35877
a2a62511d0f8
8146987: Improve Parallel GC Full GC by caching results of live_words_in_range()
tschatzl
parents:
35862
diff
changeset
|
2345 |
ref_processor()->weak_oops_do(&oop_closure); |
1 | 2346 |
// Roots were visited so references into the young gen in roots |
2347 |
// may have been scanned. Process them also. |
|
2348 |
// Should the reference processor have a span that excludes |
|
2349 |
// young gen objects? |
|
35877
a2a62511d0f8
8146987: Improve Parallel GC Full GC by caching results of live_words_in_range()
tschatzl
parents:
35862
diff
changeset
|
2350 |
PSScavenge::reference_processor()->weak_oops_do(&oop_closure); |
1 | 2351 |
} |
2352 |
||
35061 | 2353 |
// Helper class to print 8 region numbers per line and then print the total at the end. |
2354 |
class FillableRegionLogger : public StackObj { |
|
2355 |
private: |
|
37242 | 2356 |
Log(gc, compaction) log; |
35061 | 2357 |
static const int LineLength = 8; |
2358 |
size_t _regions[LineLength]; |
|
2359 |
int _next_index; |
|
2360 |
bool _enabled; |
|
2361 |
size_t _total_regions; |
|
2362 |
public: |
|
51332 | 2363 |
FillableRegionLogger() : _next_index(0), _enabled(log_develop_is_enabled(Trace, gc, compaction)), _total_regions(0) { } |
35061 | 2364 |
~FillableRegionLogger() { |
2365 |
log.trace(SIZE_FORMAT " initially fillable regions", _total_regions); |
|
2366 |
} |
|
2367 |
||
2368 |
void print_line() { |
|
2369 |
if (!_enabled || _next_index == 0) { |
|
2370 |
return; |
|
2371 |
} |
|
2372 |
FormatBuffer<> line("Fillable: "); |
|
2373 |
for (int i = 0; i < _next_index; i++) { |
|
2374 |
line.append(" " SIZE_FORMAT_W(7), _regions[i]); |
|
2375 |
} |
|
2376 |
log.trace("%s", line.buffer()); |
|
2377 |
_next_index = 0; |
|
2378 |
} |
|
2379 |
||
2380 |
void handle(size_t region) { |
|
2381 |
if (!_enabled) { |
|
2382 |
return; |
|
2383 |
} |
|
2384 |
_regions[_next_index++] = region; |
|
2385 |
if (_next_index == LineLength) { |
|
2386 |
print_line(); |
|
2387 |
} |
|
2388 |
_total_regions++; |
|
2389 |
} |
|
2390 |
}; |
|
2391 |
||
57769
f7ca942a2714
8224661: Parallel GC: Use WorkGang (3: UpdateDensePrefixAndCompactionTask)
lkorinth
parents:
57768
diff
changeset
|
2392 |
void PSParallelCompact::prepare_region_draining_tasks(uint parallel_gc_threads) |
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2393 |
{ |
35061 | 2394 |
GCTraceTime(Trace, gc, phases) tm("Drain Task Setup", &_gc_timer); |
1 | 2395 |
|
11174
fccee5238e70
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
10670
diff
changeset
|
2396 |
// Find the threads that are active |
57769
f7ca942a2714
8224661: Parallel GC: Use WorkGang (3: UpdateDensePrefixAndCompactionTask)
lkorinth
parents:
57768
diff
changeset
|
2397 |
uint worker_id = 0; |
11174
fccee5238e70
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
10670
diff
changeset
|
2398 |
|
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2399 |
// Find all regions that are available (can be filled immediately) and |
1 | 2400 |
// distribute them to the thread stacks. The iteration is done in reverse |
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2401 |
// order (high to low) so the regions will be removed in ascending order. |
1 | 2402 |
|
2403 |
const ParallelCompactData& sd = PSParallelCompact::summary_data(); |
|
2404 |
||
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13195
diff
changeset
|
2405 |
// id + 1 is used to test termination so unsigned can |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13195
diff
changeset
|
2406 |
// be used with an old_space_id == 0. |
35061 | 2407 |
FillableRegionLogger region_logger; |
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13195
diff
changeset
|
2408 |
for (unsigned int id = to_space_id; id + 1 > old_space_id; --id) { |
1 | 2409 |
SpaceInfo* const space_info = _space_info + id; |
2410 |
MutableSpace* const space = space_info->space(); |
|
2411 |
HeapWord* const new_top = space_info->new_top(); |
|
2412 |
||
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2413 |
const size_t beg_region = sd.addr_to_region_idx(space_info->dense_prefix()); |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
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parents:
1406
diff
changeset
|
2414 |
const size_t end_region = |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2415 |
sd.addr_to_region_idx(sd.region_align_up(new_top)); |
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13195
diff
changeset
|
2416 |
|
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13195
diff
changeset
|
2417 |
for (size_t cur = end_region - 1; cur + 1 > beg_region; --cur) { |
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2418 |
if (sd.region(cur)->claim_unsafe()) { |
57769
f7ca942a2714
8224661: Parallel GC: Use WorkGang (3: UpdateDensePrefixAndCompactionTask)
lkorinth
parents:
57768
diff
changeset
|
2419 |
ParCompactionManager* cm = ParCompactionManager::manager_array(worker_id); |
38170
ff88a25a7799
8150994: UseParallelGC fails with UseDynamicNumberOfGCThreads with specjbb2005
jmasa
parents:
38149
diff
changeset
|
2420 |
cm->region_stack()->push(cur); |
35061 | 2421 |
region_logger.handle(cur); |
11174
fccee5238e70
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
10670
diff
changeset
|
2422 |
// Assign regions to tasks in round-robin fashion. |
57769
f7ca942a2714
8224661: Parallel GC: Use WorkGang (3: UpdateDensePrefixAndCompactionTask)
lkorinth
parents:
57768
diff
changeset
|
2423 |
if (++worker_id == parallel_gc_threads) { |
f7ca942a2714
8224661: Parallel GC: Use WorkGang (3: UpdateDensePrefixAndCompactionTask)
lkorinth
parents:
57768
diff
changeset
|
2424 |
worker_id = 0; |
1 | 2425 |
} |
2426 |
} |
|
2427 |
} |
|
35061 | 2428 |
region_logger.print_line(); |
1 | 2429 |
} |
2430 |
} |
|
2431 |
||
57769
f7ca942a2714
8224661: Parallel GC: Use WorkGang (3: UpdateDensePrefixAndCompactionTask)
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changeset
|
2432 |
class TaskQueue : StackObj { |
f7ca942a2714
8224661: Parallel GC: Use WorkGang (3: UpdateDensePrefixAndCompactionTask)
lkorinth
parents:
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diff
changeset
|
2433 |
volatile uint _counter; |
f7ca942a2714
8224661: Parallel GC: Use WorkGang (3: UpdateDensePrefixAndCompactionTask)
lkorinth
parents:
57768
diff
changeset
|
2434 |
uint _size; |
f7ca942a2714
8224661: Parallel GC: Use WorkGang (3: UpdateDensePrefixAndCompactionTask)
lkorinth
parents:
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diff
changeset
|
2435 |
uint _insert_index; |
f7ca942a2714
8224661: Parallel GC: Use WorkGang (3: UpdateDensePrefixAndCompactionTask)
lkorinth
parents:
57768
diff
changeset
|
2436 |
PSParallelCompact::UpdateDensePrefixTask* _backing_array; |
f7ca942a2714
8224661: Parallel GC: Use WorkGang (3: UpdateDensePrefixAndCompactionTask)
lkorinth
parents:
57768
diff
changeset
|
2437 |
public: |
f7ca942a2714
8224661: Parallel GC: Use WorkGang (3: UpdateDensePrefixAndCompactionTask)
lkorinth
parents:
57768
diff
changeset
|
2438 |
explicit TaskQueue(uint size) : _counter(0), _size(size), _insert_index(0), _backing_array(NULL) { |
f7ca942a2714
8224661: Parallel GC: Use WorkGang (3: UpdateDensePrefixAndCompactionTask)
lkorinth
parents:
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diff
changeset
|
2439 |
_backing_array = NEW_C_HEAP_ARRAY(PSParallelCompact::UpdateDensePrefixTask, _size, mtGC); |
f7ca942a2714
8224661: Parallel GC: Use WorkGang (3: UpdateDensePrefixAndCompactionTask)
lkorinth
parents:
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diff
changeset
|
2440 |
} |
f7ca942a2714
8224661: Parallel GC: Use WorkGang (3: UpdateDensePrefixAndCompactionTask)
lkorinth
parents:
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diff
changeset
|
2441 |
~TaskQueue() { |
f7ca942a2714
8224661: Parallel GC: Use WorkGang (3: UpdateDensePrefixAndCompactionTask)
lkorinth
parents:
57768
diff
changeset
|
2442 |
assert(_counter >= _insert_index, "not all queue elements were claimed"); |
f7ca942a2714
8224661: Parallel GC: Use WorkGang (3: UpdateDensePrefixAndCompactionTask)
lkorinth
parents:
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diff
changeset
|
2443 |
FREE_C_HEAP_ARRAY(T, _backing_array); |
f7ca942a2714
8224661: Parallel GC: Use WorkGang (3: UpdateDensePrefixAndCompactionTask)
lkorinth
parents:
57768
diff
changeset
|
2444 |
} |
f7ca942a2714
8224661: Parallel GC: Use WorkGang (3: UpdateDensePrefixAndCompactionTask)
lkorinth
parents:
57768
diff
changeset
|
2445 |
|
f7ca942a2714
8224661: Parallel GC: Use WorkGang (3: UpdateDensePrefixAndCompactionTask)
lkorinth
parents:
57768
diff
changeset
|
2446 |
void push(const PSParallelCompact::UpdateDensePrefixTask& value) { |
f7ca942a2714
8224661: Parallel GC: Use WorkGang (3: UpdateDensePrefixAndCompactionTask)
lkorinth
parents:
57768
diff
changeset
|
2447 |
assert(_insert_index < _size, "too small backing array"); |
f7ca942a2714
8224661: Parallel GC: Use WorkGang (3: UpdateDensePrefixAndCompactionTask)
lkorinth
parents:
57768
diff
changeset
|
2448 |
_backing_array[_insert_index++] = value; |
f7ca942a2714
8224661: Parallel GC: Use WorkGang (3: UpdateDensePrefixAndCompactionTask)
lkorinth
parents:
57768
diff
changeset
|
2449 |
} |
f7ca942a2714
8224661: Parallel GC: Use WorkGang (3: UpdateDensePrefixAndCompactionTask)
lkorinth
parents:
57768
diff
changeset
|
2450 |
|
f7ca942a2714
8224661: Parallel GC: Use WorkGang (3: UpdateDensePrefixAndCompactionTask)
lkorinth
parents:
57768
diff
changeset
|
2451 |
bool try_claim(PSParallelCompact::UpdateDensePrefixTask& reference) { |
59249
29b0d0b61615
8234737: Harmonize parameter order in Atomic - add
stefank
parents:
59008
diff
changeset
|
2452 |
uint claimed = Atomic::add(&_counter, 1u) - 1; // -1 is so that we start with zero |
57769
f7ca942a2714
8224661: Parallel GC: Use WorkGang (3: UpdateDensePrefixAndCompactionTask)
lkorinth
parents:
57768
diff
changeset
|
2453 |
if (claimed < _insert_index) { |
f7ca942a2714
8224661: Parallel GC: Use WorkGang (3: UpdateDensePrefixAndCompactionTask)
lkorinth
parents:
57768
diff
changeset
|
2454 |
reference = _backing_array[claimed]; |
f7ca942a2714
8224661: Parallel GC: Use WorkGang (3: UpdateDensePrefixAndCompactionTask)
lkorinth
parents:
57768
diff
changeset
|
2455 |
return true; |
f7ca942a2714
8224661: Parallel GC: Use WorkGang (3: UpdateDensePrefixAndCompactionTask)
lkorinth
parents:
57768
diff
changeset
|
2456 |
} else { |
f7ca942a2714
8224661: Parallel GC: Use WorkGang (3: UpdateDensePrefixAndCompactionTask)
lkorinth
parents:
57768
diff
changeset
|
2457 |
return false; |
f7ca942a2714
8224661: Parallel GC: Use WorkGang (3: UpdateDensePrefixAndCompactionTask)
lkorinth
parents:
57768
diff
changeset
|
2458 |
} |
f7ca942a2714
8224661: Parallel GC: Use WorkGang (3: UpdateDensePrefixAndCompactionTask)
lkorinth
parents:
57768
diff
changeset
|
2459 |
} |
f7ca942a2714
8224661: Parallel GC: Use WorkGang (3: UpdateDensePrefixAndCompactionTask)
lkorinth
parents:
57768
diff
changeset
|
2460 |
}; |
f7ca942a2714
8224661: Parallel GC: Use WorkGang (3: UpdateDensePrefixAndCompactionTask)
lkorinth
parents:
57768
diff
changeset
|
2461 |
|
1 | 2462 |
#define PAR_OLD_DENSE_PREFIX_OVER_PARTITIONING 4 |
2463 |
||
57769
f7ca942a2714
8224661: Parallel GC: Use WorkGang (3: UpdateDensePrefixAndCompactionTask)
lkorinth
parents:
57768
diff
changeset
|
2464 |
void PSParallelCompact::enqueue_dense_prefix_tasks(TaskQueue& task_queue, |
f7ca942a2714
8224661: Parallel GC: Use WorkGang (3: UpdateDensePrefixAndCompactionTask)
lkorinth
parents:
57768
diff
changeset
|
2465 |
uint parallel_gc_threads) { |
35061 | 2466 |
GCTraceTime(Trace, gc, phases) tm("Dense Prefix Task Setup", &_gc_timer); |
1 | 2467 |
|
2468 |
ParallelCompactData& sd = PSParallelCompact::summary_data(); |
|
2469 |
||
2470 |
// Iterate over all the spaces adding tasks for updating |
|
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2471 |
// regions in the dense prefix. Assume that 1 gc thread |
1 | 2472 |
// will work on opening the gaps and the remaining gc threads |
2473 |
// will work on the dense prefix. |
|
1669
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
2474 |
unsigned int space_id; |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
2475 |
for (space_id = old_space_id; space_id < last_space_id; ++ space_id) { |
1 | 2476 |
HeapWord* const dense_prefix_end = _space_info[space_id].dense_prefix(); |
2477 |
const MutableSpace* const space = _space_info[space_id].space(); |
|
2478 |
||
2479 |
if (dense_prefix_end == space->bottom()) { |
|
2480 |
// There is no dense prefix for this space. |
|
2481 |
continue; |
|
2482 |
} |
|
2483 |
||
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2484 |
// The dense prefix is before this region. |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2485 |
size_t region_index_end_dense_prefix = |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2486 |
sd.addr_to_region_idx(dense_prefix_end); |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2487 |
RegionData* const dense_prefix_cp = |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2488 |
sd.region(region_index_end_dense_prefix); |
1 | 2489 |
assert(dense_prefix_end == space->end() || |
2490 |
dense_prefix_cp->available() || |
|
2491 |
dense_prefix_cp->claimed(), |
|
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2492 |
"The region after the dense prefix should always be ready to fill"); |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2493 |
|
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2494 |
size_t region_index_start = sd.addr_to_region_idx(space->bottom()); |
1 | 2495 |
|
2496 |
// Is there dense prefix work? |
|
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2497 |
size_t total_dense_prefix_regions = |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2498 |
region_index_end_dense_prefix - region_index_start; |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2499 |
// How many regions of the dense prefix should be given to |
1 | 2500 |
// each thread? |
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2501 |
if (total_dense_prefix_regions > 0) { |
1 | 2502 |
uint tasks_for_dense_prefix = 1; |
9178
1a022d4f1bc3
6841742: par compact - remove unused/unsupported options
jcoomes
parents:
8688
diff
changeset
|
2503 |
if (total_dense_prefix_regions <= |
1a022d4f1bc3
6841742: par compact - remove unused/unsupported options
jcoomes
parents:
8688
diff
changeset
|
2504 |
(parallel_gc_threads * PAR_OLD_DENSE_PREFIX_OVER_PARTITIONING)) { |
1a022d4f1bc3
6841742: par compact - remove unused/unsupported options
jcoomes
parents:
8688
diff
changeset
|
2505 |
// Don't over partition. This assumes that |
1a022d4f1bc3
6841742: par compact - remove unused/unsupported options
jcoomes
parents:
8688
diff
changeset
|
2506 |
// PAR_OLD_DENSE_PREFIX_OVER_PARTITIONING is a small integer value |
1a022d4f1bc3
6841742: par compact - remove unused/unsupported options
jcoomes
parents:
8688
diff
changeset
|
2507 |
// so there are not many regions to process. |
1a022d4f1bc3
6841742: par compact - remove unused/unsupported options
jcoomes
parents:
8688
diff
changeset
|
2508 |
tasks_for_dense_prefix = parallel_gc_threads; |
1a022d4f1bc3
6841742: par compact - remove unused/unsupported options
jcoomes
parents:
8688
diff
changeset
|
2509 |
} else { |
1a022d4f1bc3
6841742: par compact - remove unused/unsupported options
jcoomes
parents:
8688
diff
changeset
|
2510 |
// Over partition |
1a022d4f1bc3
6841742: par compact - remove unused/unsupported options
jcoomes
parents:
8688
diff
changeset
|
2511 |
tasks_for_dense_prefix = parallel_gc_threads * |
1a022d4f1bc3
6841742: par compact - remove unused/unsupported options
jcoomes
parents:
8688
diff
changeset
|
2512 |
PAR_OLD_DENSE_PREFIX_OVER_PARTITIONING; |
1 | 2513 |
} |
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2514 |
size_t regions_per_thread = total_dense_prefix_regions / |
1 | 2515 |
tasks_for_dense_prefix; |
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2516 |
// Give each thread at least 1 region. |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2517 |
if (regions_per_thread == 0) { |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2518 |
regions_per_thread = 1; |
1 | 2519 |
} |
2520 |
||
2521 |
for (uint k = 0; k < tasks_for_dense_prefix; k++) { |
|
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2522 |
if (region_index_start >= region_index_end_dense_prefix) { |
1 | 2523 |
break; |
2524 |
} |
|
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2525 |
// region_index_end is not processed |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2526 |
size_t region_index_end = MIN2(region_index_start + regions_per_thread, |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2527 |
region_index_end_dense_prefix); |
57769
f7ca942a2714
8224661: Parallel GC: Use WorkGang (3: UpdateDensePrefixAndCompactionTask)
lkorinth
parents:
57768
diff
changeset
|
2528 |
task_queue.push(UpdateDensePrefixTask(SpaceId(space_id), |
f7ca942a2714
8224661: Parallel GC: Use WorkGang (3: UpdateDensePrefixAndCompactionTask)
lkorinth
parents:
57768
diff
changeset
|
2529 |
region_index_start, |
f7ca942a2714
8224661: Parallel GC: Use WorkGang (3: UpdateDensePrefixAndCompactionTask)
lkorinth
parents:
57768
diff
changeset
|
2530 |
region_index_end)); |
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2531 |
region_index_start = region_index_end; |
1 | 2532 |
} |
2533 |
} |
|
2534 |
// This gets any part of the dense prefix that did not |
|
2535 |
// fit evenly. |
|
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2536 |
if (region_index_start < region_index_end_dense_prefix) { |
57769
f7ca942a2714
8224661: Parallel GC: Use WorkGang (3: UpdateDensePrefixAndCompactionTask)
lkorinth
parents:
57768
diff
changeset
|
2537 |
task_queue.push(UpdateDensePrefixTask(SpaceId(space_id), |
f7ca942a2714
8224661: Parallel GC: Use WorkGang (3: UpdateDensePrefixAndCompactionTask)
lkorinth
parents:
57768
diff
changeset
|
2538 |
region_index_start, |
f7ca942a2714
8224661: Parallel GC: Use WorkGang (3: UpdateDensePrefixAndCompactionTask)
lkorinth
parents:
57768
diff
changeset
|
2539 |
region_index_end_dense_prefix)); |
1 | 2540 |
} |
1669
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
2541 |
} |
1 | 2542 |
} |
2543 |
||
17851
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
2544 |
#ifdef ASSERT |
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
2545 |
// Write a histogram of the number of times the block table was filled for a |
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
2546 |
// region. |
35061 | 2547 |
void PSParallelCompact::write_block_fill_histogram() |
17851
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
2548 |
{ |
35901
f5028c67e7cb
8147918: Rename develop_log_is_enabled() to log_develop_is_enabled()
pliden
parents:
35877
diff
changeset
|
2549 |
if (!log_develop_is_enabled(Trace, gc, compaction)) { |
35061 | 2550 |
return; |
2551 |
} |
|
2552 |
||
37242 | 2553 |
Log(gc, compaction) log; |
35061 | 2554 |
ResourceMark rm; |
46701
f559541c0daa
8181917: Refactor UL LogStreams to avoid using resource area
stuefe
parents:
46625
diff
changeset
|
2555 |
LogStream ls(log.trace()); |
f559541c0daa
8181917: Refactor UL LogStreams to avoid using resource area
stuefe
parents:
46625
diff
changeset
|
2556 |
outputStream* out = &ls; |
17851
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
2557 |
|
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
2558 |
typedef ParallelCompactData::RegionData rd_t; |
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
2559 |
ParallelCompactData& sd = summary_data(); |
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
2560 |
|
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
2561 |
for (unsigned int id = old_space_id; id < last_space_id; ++id) { |
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
2562 |
MutableSpace* const spc = _space_info[id].space(); |
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
2563 |
if (spc->bottom() != spc->top()) { |
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
2564 |
const rd_t* const beg = sd.addr_to_region_ptr(spc->bottom()); |
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
2565 |
HeapWord* const top_aligned_up = sd.region_align_up(spc->top()); |
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
2566 |
const rd_t* const end = sd.addr_to_region_ptr(top_aligned_up); |
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
2567 |
|
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
2568 |
size_t histo[5] = { 0, 0, 0, 0, 0 }; |
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
2569 |
const size_t histo_len = sizeof(histo) / sizeof(size_t); |
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
2570 |
const size_t region_cnt = pointer_delta(end, beg, sizeof(rd_t)); |
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
2571 |
|
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
2572 |
for (const rd_t* cur = beg; cur < end; ++cur) { |
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
2573 |
++histo[MIN2(cur->blocks_filled_count(), histo_len - 1)]; |
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
2574 |
} |
35061 | 2575 |
out->print("Block fill histogram: %u %-4s" SIZE_FORMAT_W(5), id, space_names[id], region_cnt); |
17851
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
2576 |
for (size_t i = 0; i < histo_len; ++i) { |
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
2577 |
out->print(" " SIZE_FORMAT_W(5) " %5.1f%%", |
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
2578 |
histo[i], 100.0 * histo[i] / region_cnt); |
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
2579 |
} |
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
2580 |
out->cr(); |
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
2581 |
} |
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
2582 |
} |
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
2583 |
} |
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
2584 |
#endif // #ifdef ASSERT |
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
2585 |
|
57769
f7ca942a2714
8224661: Parallel GC: Use WorkGang (3: UpdateDensePrefixAndCompactionTask)
lkorinth
parents:
57768
diff
changeset
|
2586 |
static void compaction_with_stealing_work(ParallelTaskTerminator* terminator, uint worker_id) { |
f7ca942a2714
8224661: Parallel GC: Use WorkGang (3: UpdateDensePrefixAndCompactionTask)
lkorinth
parents:
57768
diff
changeset
|
2587 |
assert(ParallelScavengeHeap::heap()->is_gc_active(), "called outside gc"); |
f7ca942a2714
8224661: Parallel GC: Use WorkGang (3: UpdateDensePrefixAndCompactionTask)
lkorinth
parents:
57768
diff
changeset
|
2588 |
|
f7ca942a2714
8224661: Parallel GC: Use WorkGang (3: UpdateDensePrefixAndCompactionTask)
lkorinth
parents:
57768
diff
changeset
|
2589 |
ParCompactionManager* cm = |
f7ca942a2714
8224661: Parallel GC: Use WorkGang (3: UpdateDensePrefixAndCompactionTask)
lkorinth
parents:
57768
diff
changeset
|
2590 |
ParCompactionManager::gc_thread_compaction_manager(worker_id); |
f7ca942a2714
8224661: Parallel GC: Use WorkGang (3: UpdateDensePrefixAndCompactionTask)
lkorinth
parents:
57768
diff
changeset
|
2591 |
|
f7ca942a2714
8224661: Parallel GC: Use WorkGang (3: UpdateDensePrefixAndCompactionTask)
lkorinth
parents:
57768
diff
changeset
|
2592 |
// Drain the stacks that have been preloaded with regions |
f7ca942a2714
8224661: Parallel GC: Use WorkGang (3: UpdateDensePrefixAndCompactionTask)
lkorinth
parents:
57768
diff
changeset
|
2593 |
// that are ready to fill. |
f7ca942a2714
8224661: Parallel GC: Use WorkGang (3: UpdateDensePrefixAndCompactionTask)
lkorinth
parents:
57768
diff
changeset
|
2594 |
|
f7ca942a2714
8224661: Parallel GC: Use WorkGang (3: UpdateDensePrefixAndCompactionTask)
lkorinth
parents:
57768
diff
changeset
|
2595 |
cm->drain_region_stacks(); |
f7ca942a2714
8224661: Parallel GC: Use WorkGang (3: UpdateDensePrefixAndCompactionTask)
lkorinth
parents:
57768
diff
changeset
|
2596 |
|
f7ca942a2714
8224661: Parallel GC: Use WorkGang (3: UpdateDensePrefixAndCompactionTask)
lkorinth
parents:
57768
diff
changeset
|
2597 |
guarantee(cm->region_stack()->is_empty(), "Not empty"); |
f7ca942a2714
8224661: Parallel GC: Use WorkGang (3: UpdateDensePrefixAndCompactionTask)
lkorinth
parents:
57768
diff
changeset
|
2598 |
|
f7ca942a2714
8224661: Parallel GC: Use WorkGang (3: UpdateDensePrefixAndCompactionTask)
lkorinth
parents:
57768
diff
changeset
|
2599 |
size_t region_index = 0; |
f7ca942a2714
8224661: Parallel GC: Use WorkGang (3: UpdateDensePrefixAndCompactionTask)
lkorinth
parents:
57768
diff
changeset
|
2600 |
|
f7ca942a2714
8224661: Parallel GC: Use WorkGang (3: UpdateDensePrefixAndCompactionTask)
lkorinth
parents:
57768
diff
changeset
|
2601 |
while (true) { |
f7ca942a2714
8224661: Parallel GC: Use WorkGang (3: UpdateDensePrefixAndCompactionTask)
lkorinth
parents:
57768
diff
changeset
|
2602 |
if (ParCompactionManager::steal(worker_id, region_index)) { |
f7ca942a2714
8224661: Parallel GC: Use WorkGang (3: UpdateDensePrefixAndCompactionTask)
lkorinth
parents:
57768
diff
changeset
|
2603 |
PSParallelCompact::fill_and_update_region(cm, region_index); |
f7ca942a2714
8224661: Parallel GC: Use WorkGang (3: UpdateDensePrefixAndCompactionTask)
lkorinth
parents:
57768
diff
changeset
|
2604 |
cm->drain_region_stacks(); |
f7ca942a2714
8224661: Parallel GC: Use WorkGang (3: UpdateDensePrefixAndCompactionTask)
lkorinth
parents:
57768
diff
changeset
|
2605 |
} else { |
f7ca942a2714
8224661: Parallel GC: Use WorkGang (3: UpdateDensePrefixAndCompactionTask)
lkorinth
parents:
57768
diff
changeset
|
2606 |
if (terminator->offer_termination()) { |
f7ca942a2714
8224661: Parallel GC: Use WorkGang (3: UpdateDensePrefixAndCompactionTask)
lkorinth
parents:
57768
diff
changeset
|
2607 |
break; |
f7ca942a2714
8224661: Parallel GC: Use WorkGang (3: UpdateDensePrefixAndCompactionTask)
lkorinth
parents:
57768
diff
changeset
|
2608 |
} |
f7ca942a2714
8224661: Parallel GC: Use WorkGang (3: UpdateDensePrefixAndCompactionTask)
lkorinth
parents:
57768
diff
changeset
|
2609 |
// Go around again. |
f7ca942a2714
8224661: Parallel GC: Use WorkGang (3: UpdateDensePrefixAndCompactionTask)
lkorinth
parents:
57768
diff
changeset
|
2610 |
} |
f7ca942a2714
8224661: Parallel GC: Use WorkGang (3: UpdateDensePrefixAndCompactionTask)
lkorinth
parents:
57768
diff
changeset
|
2611 |
} |
f7ca942a2714
8224661: Parallel GC: Use WorkGang (3: UpdateDensePrefixAndCompactionTask)
lkorinth
parents:
57768
diff
changeset
|
2612 |
return; |
f7ca942a2714
8224661: Parallel GC: Use WorkGang (3: UpdateDensePrefixAndCompactionTask)
lkorinth
parents:
57768
diff
changeset
|
2613 |
} |
f7ca942a2714
8224661: Parallel GC: Use WorkGang (3: UpdateDensePrefixAndCompactionTask)
lkorinth
parents:
57768
diff
changeset
|
2614 |
|
f7ca942a2714
8224661: Parallel GC: Use WorkGang (3: UpdateDensePrefixAndCompactionTask)
lkorinth
parents:
57768
diff
changeset
|
2615 |
class UpdateDensePrefixAndCompactionTask: public AbstractGangTask { |
f7ca942a2714
8224661: Parallel GC: Use WorkGang (3: UpdateDensePrefixAndCompactionTask)
lkorinth
parents:
57768
diff
changeset
|
2616 |
typedef AbstractRefProcTaskExecutor::ProcessTask ProcessTask; |
f7ca942a2714
8224661: Parallel GC: Use WorkGang (3: UpdateDensePrefixAndCompactionTask)
lkorinth
parents:
57768
diff
changeset
|
2617 |
TaskQueue& _tq; |
f7ca942a2714
8224661: Parallel GC: Use WorkGang (3: UpdateDensePrefixAndCompactionTask)
lkorinth
parents:
57768
diff
changeset
|
2618 |
TaskTerminator _terminator; |
f7ca942a2714
8224661: Parallel GC: Use WorkGang (3: UpdateDensePrefixAndCompactionTask)
lkorinth
parents:
57768
diff
changeset
|
2619 |
uint _active_workers; |
f7ca942a2714
8224661: Parallel GC: Use WorkGang (3: UpdateDensePrefixAndCompactionTask)
lkorinth
parents:
57768
diff
changeset
|
2620 |
|
f7ca942a2714
8224661: Parallel GC: Use WorkGang (3: UpdateDensePrefixAndCompactionTask)
lkorinth
parents:
57768
diff
changeset
|
2621 |
public: |
f7ca942a2714
8224661: Parallel GC: Use WorkGang (3: UpdateDensePrefixAndCompactionTask)
lkorinth
parents:
57768
diff
changeset
|
2622 |
UpdateDensePrefixAndCompactionTask(TaskQueue& tq, uint active_workers) : |
f7ca942a2714
8224661: Parallel GC: Use WorkGang (3: UpdateDensePrefixAndCompactionTask)
lkorinth
parents:
57768
diff
changeset
|
2623 |
AbstractGangTask("UpdateDensePrefixAndCompactionTask"), |
f7ca942a2714
8224661: Parallel GC: Use WorkGang (3: UpdateDensePrefixAndCompactionTask)
lkorinth
parents:
57768
diff
changeset
|
2624 |
_tq(tq), |
f7ca942a2714
8224661: Parallel GC: Use WorkGang (3: UpdateDensePrefixAndCompactionTask)
lkorinth
parents:
57768
diff
changeset
|
2625 |
_terminator(active_workers, ParCompactionManager::region_array()), |
f7ca942a2714
8224661: Parallel GC: Use WorkGang (3: UpdateDensePrefixAndCompactionTask)
lkorinth
parents:
57768
diff
changeset
|
2626 |
_active_workers(active_workers) { |
f7ca942a2714
8224661: Parallel GC: Use WorkGang (3: UpdateDensePrefixAndCompactionTask)
lkorinth
parents:
57768
diff
changeset
|
2627 |
} |
f7ca942a2714
8224661: Parallel GC: Use WorkGang (3: UpdateDensePrefixAndCompactionTask)
lkorinth
parents:
57768
diff
changeset
|
2628 |
virtual void work(uint worker_id) { |
f7ca942a2714
8224661: Parallel GC: Use WorkGang (3: UpdateDensePrefixAndCompactionTask)
lkorinth
parents:
57768
diff
changeset
|
2629 |
ParCompactionManager* cm = ParCompactionManager::gc_thread_compaction_manager(worker_id); |
f7ca942a2714
8224661: Parallel GC: Use WorkGang (3: UpdateDensePrefixAndCompactionTask)
lkorinth
parents:
57768
diff
changeset
|
2630 |
|
f7ca942a2714
8224661: Parallel GC: Use WorkGang (3: UpdateDensePrefixAndCompactionTask)
lkorinth
parents:
57768
diff
changeset
|
2631 |
for (PSParallelCompact::UpdateDensePrefixTask task; _tq.try_claim(task); /* empty */) { |
f7ca942a2714
8224661: Parallel GC: Use WorkGang (3: UpdateDensePrefixAndCompactionTask)
lkorinth
parents:
57768
diff
changeset
|
2632 |
PSParallelCompact::update_and_deadwood_in_dense_prefix(cm, |
f7ca942a2714
8224661: Parallel GC: Use WorkGang (3: UpdateDensePrefixAndCompactionTask)
lkorinth
parents:
57768
diff
changeset
|
2633 |
task._space_id, |
f7ca942a2714
8224661: Parallel GC: Use WorkGang (3: UpdateDensePrefixAndCompactionTask)
lkorinth
parents:
57768
diff
changeset
|
2634 |
task._region_index_start, |
f7ca942a2714
8224661: Parallel GC: Use WorkGang (3: UpdateDensePrefixAndCompactionTask)
lkorinth
parents:
57768
diff
changeset
|
2635 |
task._region_index_end); |
f7ca942a2714
8224661: Parallel GC: Use WorkGang (3: UpdateDensePrefixAndCompactionTask)
lkorinth
parents:
57768
diff
changeset
|
2636 |
} |
f7ca942a2714
8224661: Parallel GC: Use WorkGang (3: UpdateDensePrefixAndCompactionTask)
lkorinth
parents:
57768
diff
changeset
|
2637 |
|
f7ca942a2714
8224661: Parallel GC: Use WorkGang (3: UpdateDensePrefixAndCompactionTask)
lkorinth
parents:
57768
diff
changeset
|
2638 |
// Once a thread has drained it's stack, it should try to steal regions from |
f7ca942a2714
8224661: Parallel GC: Use WorkGang (3: UpdateDensePrefixAndCompactionTask)
lkorinth
parents:
57768
diff
changeset
|
2639 |
// other threads. |
f7ca942a2714
8224661: Parallel GC: Use WorkGang (3: UpdateDensePrefixAndCompactionTask)
lkorinth
parents:
57768
diff
changeset
|
2640 |
compaction_with_stealing_work(_terminator.terminator(), worker_id); |
f7ca942a2714
8224661: Parallel GC: Use WorkGang (3: UpdateDensePrefixAndCompactionTask)
lkorinth
parents:
57768
diff
changeset
|
2641 |
} |
f7ca942a2714
8224661: Parallel GC: Use WorkGang (3: UpdateDensePrefixAndCompactionTask)
lkorinth
parents:
57768
diff
changeset
|
2642 |
}; |
f7ca942a2714
8224661: Parallel GC: Use WorkGang (3: UpdateDensePrefixAndCompactionTask)
lkorinth
parents:
57768
diff
changeset
|
2643 |
|
1 | 2644 |
void PSParallelCompact::compact() { |
37146 | 2645 |
GCTraceTime(Info, gc, phases) tm("Compaction Phase", &_gc_timer); |
1 | 2646 |
|
30173
13cf7580b000
8077413: Avoid use of Universe::heap() inside collectors
pliden
parents:
30150
diff
changeset
|
2647 |
ParallelScavengeHeap* heap = ParallelScavengeHeap::heap(); |
1 | 2648 |
PSOldGen* old_gen = heap->old_gen(); |
2649 |
old_gen->start_array()->reset(); |
|
57769
f7ca942a2714
8224661: Parallel GC: Use WorkGang (3: UpdateDensePrefixAndCompactionTask)
lkorinth
parents:
57768
diff
changeset
|
2650 |
uint active_gc_threads = ParallelScavengeHeap::heap()->workers().active_workers(); |
f7ca942a2714
8224661: Parallel GC: Use WorkGang (3: UpdateDensePrefixAndCompactionTask)
lkorinth
parents:
57768
diff
changeset
|
2651 |
|
f7ca942a2714
8224661: Parallel GC: Use WorkGang (3: UpdateDensePrefixAndCompactionTask)
lkorinth
parents:
57768
diff
changeset
|
2652 |
// for [0..last_space_id) |
f7ca942a2714
8224661: Parallel GC: Use WorkGang (3: UpdateDensePrefixAndCompactionTask)
lkorinth
parents:
57768
diff
changeset
|
2653 |
// for [0..active_gc_threads * PAR_OLD_DENSE_PREFIX_OVER_PARTITIONING) |
f7ca942a2714
8224661: Parallel GC: Use WorkGang (3: UpdateDensePrefixAndCompactionTask)
lkorinth
parents:
57768
diff
changeset
|
2654 |
// push |
f7ca942a2714
8224661: Parallel GC: Use WorkGang (3: UpdateDensePrefixAndCompactionTask)
lkorinth
parents:
57768
diff
changeset
|
2655 |
// push |
f7ca942a2714
8224661: Parallel GC: Use WorkGang (3: UpdateDensePrefixAndCompactionTask)
lkorinth
parents:
57768
diff
changeset
|
2656 |
// |
f7ca942a2714
8224661: Parallel GC: Use WorkGang (3: UpdateDensePrefixAndCompactionTask)
lkorinth
parents:
57768
diff
changeset
|
2657 |
// max push count is thus: last_space_id * (active_gc_threads * PAR_OLD_DENSE_PREFIX_OVER_PARTITIONING + 1) |
f7ca942a2714
8224661: Parallel GC: Use WorkGang (3: UpdateDensePrefixAndCompactionTask)
lkorinth
parents:
57768
diff
changeset
|
2658 |
TaskQueue task_queue(last_space_id * (active_gc_threads * PAR_OLD_DENSE_PREFIX_OVER_PARTITIONING + 1)); |
f7ca942a2714
8224661: Parallel GC: Use WorkGang (3: UpdateDensePrefixAndCompactionTask)
lkorinth
parents:
57768
diff
changeset
|
2659 |
prepare_region_draining_tasks(active_gc_threads); |
f7ca942a2714
8224661: Parallel GC: Use WorkGang (3: UpdateDensePrefixAndCompactionTask)
lkorinth
parents:
57768
diff
changeset
|
2660 |
enqueue_dense_prefix_tasks(task_queue, active_gc_threads); |
1 | 2661 |
|
2662 |
{ |
|
35061 | 2663 |
GCTraceTime(Trace, gc, phases) tm("Par Compact", &_gc_timer); |
1 | 2664 |
|
57769
f7ca942a2714
8224661: Parallel GC: Use WorkGang (3: UpdateDensePrefixAndCompactionTask)
lkorinth
parents:
57768
diff
changeset
|
2665 |
UpdateDensePrefixAndCompactionTask task(task_queue, active_gc_threads); |
f7ca942a2714
8224661: Parallel GC: Use WorkGang (3: UpdateDensePrefixAndCompactionTask)
lkorinth
parents:
57768
diff
changeset
|
2666 |
ParallelScavengeHeap::heap()->workers().run_task(&task); |
1 | 2667 |
|
2668 |
#ifdef ASSERT |
|
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2669 |
// Verify that all regions have been processed before the deferred updates. |
1 | 2670 |
for (unsigned int id = old_space_id; id < last_space_id; ++id) { |
2671 |
verify_complete(SpaceId(id)); |
|
2672 |
} |
|
2673 |
#endif |
|
2674 |
} |
|
2675 |
||
2676 |
{ |
|
2677 |
// Update the deferred objects, if any. Any compaction manager can be used. |
|
35061 | 2678 |
GCTraceTime(Trace, gc, phases) tm("Deferred Updates", &_gc_timer); |
1 | 2679 |
ParCompactionManager* cm = ParCompactionManager::manager_array(0); |
2680 |
for (unsigned int id = old_space_id; id < last_space_id; ++id) { |
|
2681 |
update_deferred_objects(cm, SpaceId(id)); |
|
2682 |
} |
|
2683 |
} |
|
17851
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
2684 |
|
35061 | 2685 |
DEBUG_ONLY(write_block_fill_histogram()); |
1 | 2686 |
} |
2687 |
||
2688 |
#ifdef ASSERT |
|
2689 |
void PSParallelCompact::verify_complete(SpaceId space_id) { |
|
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2690 |
// All Regions between space bottom() to new_top() should be marked as filled |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2691 |
// and all Regions between new_top() and top() should be available (i.e., |
1 | 2692 |
// should have been emptied). |
2693 |
ParallelCompactData& sd = summary_data(); |
|
2694 |
SpaceInfo si = _space_info[space_id]; |
|
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2695 |
HeapWord* new_top_addr = sd.region_align_up(si.new_top()); |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2696 |
HeapWord* old_top_addr = sd.region_align_up(si.space()->top()); |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2697 |
const size_t beg_region = sd.addr_to_region_idx(si.space()->bottom()); |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2698 |
const size_t new_top_region = sd.addr_to_region_idx(new_top_addr); |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2699 |
const size_t old_top_region = sd.addr_to_region_idx(old_top_addr); |
1 | 2700 |
|
2701 |
bool issued_a_warning = false; |
|
2702 |
||
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2703 |
size_t cur_region; |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2704 |
for (cur_region = beg_region; cur_region < new_top_region; ++cur_region) { |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2705 |
const RegionData* const c = sd.region(cur_region); |
1 | 2706 |
if (!c->completed()) { |
37073
c39d0903390b
8151605: Change warning() to log_warning(gc) in the GC code
brutisso
parents:
36581
diff
changeset
|
2707 |
log_warning(gc)("region " SIZE_FORMAT " not filled: destination_count=%u", |
c39d0903390b
8151605: Change warning() to log_warning(gc) in the GC code
brutisso
parents:
36581
diff
changeset
|
2708 |
cur_region, c->destination_count()); |
1 | 2709 |
issued_a_warning = true; |
2710 |
} |
|
2711 |
} |
|
2712 |
||
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2713 |
for (cur_region = new_top_region; cur_region < old_top_region; ++cur_region) { |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2714 |
const RegionData* const c = sd.region(cur_region); |
1 | 2715 |
if (!c->available()) { |
37073
c39d0903390b
8151605: Change warning() to log_warning(gc) in the GC code
brutisso
parents:
36581
diff
changeset
|
2716 |
log_warning(gc)("region " SIZE_FORMAT " not empty: destination_count=%u", |
c39d0903390b
8151605: Change warning() to log_warning(gc) in the GC code
brutisso
parents:
36581
diff
changeset
|
2717 |
cur_region, c->destination_count()); |
1 | 2718 |
issued_a_warning = true; |
2719 |
} |
|
2720 |
} |
|
2721 |
||
2722 |
if (issued_a_warning) { |
|
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2723 |
print_region_ranges(); |
1 | 2724 |
} |
2725 |
} |
|
2726 |
#endif // #ifdef ASSERT |
|
2727 |
||
29792
8c6fa07f0869
8075957: Reduce calls to the GC specific object visitors in oopDesc
stefank
parents:
29325
diff
changeset
|
2728 |
inline void UpdateOnlyClosure::do_addr(HeapWord* addr) { |
8c6fa07f0869
8075957: Reduce calls to the GC specific object visitors in oopDesc
stefank
parents:
29325
diff
changeset
|
2729 |
_start_array->allocate_block(addr); |
8c6fa07f0869
8075957: Reduce calls to the GC specific object visitors in oopDesc
stefank
parents:
29325
diff
changeset
|
2730 |
compaction_manager()->update_contents(oop(addr)); |
8c6fa07f0869
8075957: Reduce calls to the GC specific object visitors in oopDesc
stefank
parents:
29325
diff
changeset
|
2731 |
} |
8c6fa07f0869
8075957: Reduce calls to the GC specific object visitors in oopDesc
stefank
parents:
29325
diff
changeset
|
2732 |
|
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2733 |
// Update interior oops in the ranges of regions [beg_region, end_region). |
1 | 2734 |
void |
2735 |
PSParallelCompact::update_and_deadwood_in_dense_prefix(ParCompactionManager* cm, |
|
2736 |
SpaceId space_id, |
|
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2737 |
size_t beg_region, |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2738 |
size_t end_region) { |
1 | 2739 |
ParallelCompactData& sd = summary_data(); |
2740 |
ParMarkBitMap* const mbm = mark_bitmap(); |
|
2741 |
||
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2742 |
HeapWord* beg_addr = sd.region_to_addr(beg_region); |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2743 |
HeapWord* const end_addr = sd.region_to_addr(end_region); |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2744 |
assert(beg_region <= end_region, "bad region range"); |
1 | 2745 |
assert(end_addr <= dense_prefix(space_id), "not in the dense prefix"); |
2746 |
||
2747 |
#ifdef ASSERT |
|
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2748 |
// Claim the regions to avoid triggering an assert when they are marked as |
1 | 2749 |
// filled. |
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2750 |
for (size_t claim_region = beg_region; claim_region < end_region; ++claim_region) { |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2751 |
assert(sd.region(claim_region)->claim_unsafe(), "claim() failed"); |
1 | 2752 |
} |
2753 |
#endif // #ifdef ASSERT |
|
2754 |
||
2755 |
if (beg_addr != space(space_id)->bottom()) { |
|
2756 |
// Find the first live object or block of dead space that *starts* in this |
|
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2757 |
// range of regions. If a partial object crosses onto the region, skip it; |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2758 |
// it will be marked for 'deferred update' when the object head is |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2759 |
// processed. If dead space crosses onto the region, it is also skipped; it |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2760 |
// will be filled when the prior region is processed. If neither of those |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2761 |
// apply, the first word in the region is the start of a live object or dead |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2762 |
// space. |
1 | 2763 |
assert(beg_addr > space(space_id)->bottom(), "sanity"); |
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2764 |
const RegionData* const cp = sd.region(beg_region); |
1 | 2765 |
if (cp->partial_obj_size() != 0) { |
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2766 |
beg_addr = sd.partial_obj_end(beg_region); |
1 | 2767 |
} else if (dead_space_crosses_boundary(cp, mbm->addr_to_bit(beg_addr))) { |
2768 |
beg_addr = mbm->find_obj_beg(beg_addr, end_addr); |
|
2769 |
} |
|
2770 |
} |
|
2771 |
||
2772 |
if (beg_addr < end_addr) { |
|
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2773 |
// A live object or block of dead space starts in this range of Regions. |
1 | 2774 |
HeapWord* const dense_prefix_end = dense_prefix(space_id); |
2775 |
||
2776 |
// Create closures and iterate. |
|
2777 |
UpdateOnlyClosure update_closure(mbm, cm, space_id); |
|
2778 |
FillClosure fill_closure(cm, space_id); |
|
2779 |
ParMarkBitMap::IterationStatus status; |
|
2780 |
status = mbm->iterate(&update_closure, &fill_closure, beg_addr, end_addr, |
|
2781 |
dense_prefix_end); |
|
2782 |
if (status == ParMarkBitMap::incomplete) { |
|
2783 |
update_closure.do_addr(update_closure.source()); |
|
2784 |
} |
|
2785 |
} |
|
2786 |
||
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2787 |
// Mark the regions as filled. |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2788 |
RegionData* const beg_cp = sd.region(beg_region); |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2789 |
RegionData* const end_cp = sd.region(end_region); |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2790 |
for (RegionData* cp = beg_cp; cp < end_cp; ++cp) { |
1 | 2791 |
cp->set_completed(); |
2792 |
} |
|
2793 |
} |
|
2794 |
||
2795 |
// Return the SpaceId for the space containing addr. If addr is not in the |
|
2796 |
// heap, last_space_id is returned. In debug mode it expects the address to be |
|
2797 |
// in the heap and asserts such. |
|
2798 |
PSParallelCompact::SpaceId PSParallelCompact::space_id(HeapWord* addr) { |
|
30173
13cf7580b000
8077413: Avoid use of Universe::heap() inside collectors
pliden
parents:
30150
diff
changeset
|
2799 |
assert(ParallelScavengeHeap::heap()->is_in_reserved(addr), "addr not in the heap"); |
1 | 2800 |
|
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13195
diff
changeset
|
2801 |
for (unsigned int id = old_space_id; id < last_space_id; ++id) { |
1 | 2802 |
if (_space_info[id].space()->contains(addr)) { |
2803 |
return SpaceId(id); |
|
2804 |
} |
|
2805 |
} |
|
2806 |
||
2807 |
assert(false, "no space contains the addr"); |
|
2808 |
return last_space_id; |
|
2809 |
} |
|
2810 |
||
2811 |
void PSParallelCompact::update_deferred_objects(ParCompactionManager* cm, |
|
2812 |
SpaceId id) { |
|
2813 |
assert(id < last_space_id, "bad space id"); |
|
2814 |
||
2815 |
ParallelCompactData& sd = summary_data(); |
|
2816 |
const SpaceInfo* const space_info = _space_info + id; |
|
2817 |
ObjectStartArray* const start_array = space_info->start_array(); |
|
2818 |
||
2819 |
const MutableSpace* const space = space_info->space(); |
|
2820 |
assert(space_info->dense_prefix() >= space->bottom(), "dense_prefix not set"); |
|
2821 |
HeapWord* const beg_addr = space_info->dense_prefix(); |
|
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2822 |
HeapWord* const end_addr = sd.region_align_up(space_info->new_top()); |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2823 |
|
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2824 |
const RegionData* const beg_region = sd.addr_to_region_ptr(beg_addr); |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2825 |
const RegionData* const end_region = sd.addr_to_region_ptr(end_addr); |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2826 |
const RegionData* cur_region; |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2827 |
for (cur_region = beg_region; cur_region < end_region; ++cur_region) { |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2828 |
HeapWord* const addr = cur_region->deferred_obj_addr(); |
1 | 2829 |
if (addr != NULL) { |
2830 |
if (start_array != NULL) { |
|
2831 |
start_array->allocate_block(addr); |
|
2832 |
} |
|
29792
8c6fa07f0869
8075957: Reduce calls to the GC specific object visitors in oopDesc
stefank
parents:
29325
diff
changeset
|
2833 |
cm->update_contents(oop(addr)); |
46968
9119841280f4
8160399: is_oop_or_null involves undefined behavior
coleenp
parents:
46795
diff
changeset
|
2834 |
assert(oopDesc::is_oop_or_null(oop(addr)), "Expected an oop or NULL at " PTR_FORMAT, p2i(oop(addr))); |
1 | 2835 |
} |
2836 |
} |
|
2837 |
} |
|
2838 |
||
2839 |
// Skip over count live words starting from beg, and return the address of the |
|
2840 |
// next live word. Unless marked, the word corresponding to beg is assumed to |
|
2841 |
// be dead. Callers must either ensure beg does not correspond to the middle of |
|
2842 |
// an object, or account for those live words in some other way. Callers must |
|
2843 |
// also ensure that there are enough live words in the range [beg, end) to skip. |
|
2844 |
HeapWord* |
|
2845 |
PSParallelCompact::skip_live_words(HeapWord* beg, HeapWord* end, size_t count) |
|
2846 |
{ |
|
2847 |
assert(count > 0, "sanity"); |
|
2848 |
||
2849 |
ParMarkBitMap* m = mark_bitmap(); |
|
2850 |
idx_t bits_to_skip = m->words_to_bits(count); |
|
2851 |
idx_t cur_beg = m->addr_to_bit(beg); |
|
2852 |
const idx_t search_end = BitMap::word_align_up(m->addr_to_bit(end)); |
|
2853 |
||
2854 |
do { |
|
2855 |
cur_beg = m->find_obj_beg(cur_beg, search_end); |
|
2856 |
idx_t cur_end = m->find_obj_end(cur_beg, search_end); |
|
2857 |
const size_t obj_bits = cur_end - cur_beg + 1; |
|
2858 |
if (obj_bits > bits_to_skip) { |
|
2859 |
return m->bit_to_addr(cur_beg + bits_to_skip); |
|
2860 |
} |
|
2861 |
bits_to_skip -= obj_bits; |
|
2862 |
cur_beg = cur_end + 1; |
|
2863 |
} while (bits_to_skip > 0); |
|
2864 |
||
2865 |
// Skipping the desired number of words landed just past the end of an object. |
|
2866 |
// Find the start of the next object. |
|
2867 |
cur_beg = m->find_obj_beg(cur_beg, search_end); |
|
2868 |
assert(cur_beg < m->addr_to_bit(end), "not enough live words to skip"); |
|
2869 |
return m->bit_to_addr(cur_beg); |
|
2870 |
} |
|
2871 |
||
1669
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
2872 |
HeapWord* PSParallelCompact::first_src_addr(HeapWord* const dest_addr, |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
2873 |
SpaceId src_space_id, |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
2874 |
size_t src_region_idx) |
1 | 2875 |
{ |
1669
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
2876 |
assert(summary_data().is_region_aligned(dest_addr), "not aligned"); |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
2877 |
|
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
2878 |
const SplitInfo& split_info = _space_info[src_space_id].split_info(); |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
2879 |
if (split_info.dest_region_addr() == dest_addr) { |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
2880 |
// The partial object ending at the split point contains the first word to |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
2881 |
// be copied to dest_addr. |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
2882 |
return split_info.first_src_addr(); |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
2883 |
} |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
2884 |
|
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
2885 |
const ParallelCompactData& sd = summary_data(); |
1 | 2886 |
ParMarkBitMap* const bitmap = mark_bitmap(); |
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2887 |
const size_t RegionSize = ParallelCompactData::RegionSize; |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2888 |
|
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2889 |
assert(sd.is_region_aligned(dest_addr), "not aligned"); |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2890 |
const RegionData* const src_region_ptr = sd.region(src_region_idx); |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2891 |
const size_t partial_obj_size = src_region_ptr->partial_obj_size(); |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2892 |
HeapWord* const src_region_destination = src_region_ptr->destination(); |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2893 |
|
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2894 |
assert(dest_addr >= src_region_destination, "wrong src region"); |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2895 |
assert(src_region_ptr->data_size() > 0, "src region cannot be empty"); |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2896 |
|
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2897 |
HeapWord* const src_region_beg = sd.region_to_addr(src_region_idx); |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2898 |
HeapWord* const src_region_end = src_region_beg + RegionSize; |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2899 |
|
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2900 |
HeapWord* addr = src_region_beg; |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2901 |
if (dest_addr == src_region_destination) { |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2902 |
// Return the first live word in the source region. |
1 | 2903 |
if (partial_obj_size == 0) { |
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2904 |
addr = bitmap->find_obj_beg(addr, src_region_end); |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2905 |
assert(addr < src_region_end, "no objects start in src region"); |
1 | 2906 |
} |
2907 |
return addr; |
|
2908 |
} |
|
2909 |
||
2910 |
// Must skip some live data. |
|
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2911 |
size_t words_to_skip = dest_addr - src_region_destination; |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2912 |
assert(src_region_ptr->data_size() > words_to_skip, "wrong src region"); |
1 | 2913 |
|
2914 |
if (partial_obj_size >= words_to_skip) { |
|
2915 |
// All the live words to skip are part of the partial object. |
|
2916 |
addr += words_to_skip; |
|
2917 |
if (partial_obj_size == words_to_skip) { |
|
2918 |
// Find the first live word past the partial object. |
|
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2919 |
addr = bitmap->find_obj_beg(addr, src_region_end); |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2920 |
assert(addr < src_region_end, "wrong src region"); |
1 | 2921 |
} |
2922 |
return addr; |
|
2923 |
} |
|
2924 |
||
2925 |
// Skip over the partial object (if any). |
|
2926 |
if (partial_obj_size != 0) { |
|
2927 |
words_to_skip -= partial_obj_size; |
|
2928 |
addr += partial_obj_size; |
|
2929 |
} |
|
2930 |
||
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2931 |
// Skip over live words due to objects that start in the region. |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2932 |
addr = skip_live_words(addr, src_region_end, words_to_skip); |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2933 |
assert(addr < src_region_end, "wrong src region"); |
1 | 2934 |
return addr; |
2935 |
} |
|
2936 |
||
2937 |
void PSParallelCompact::decrement_destination_counts(ParCompactionManager* cm, |
|
1682
94ad5692b3a7
6784849: par compact - can fail when to_space is non-empty
jcoomes
parents:
1670
diff
changeset
|
2938 |
SpaceId src_space_id, |
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2939 |
size_t beg_region, |
1 | 2940 |
HeapWord* end_addr) |
2941 |
{ |
|
2942 |
ParallelCompactData& sd = summary_data(); |
|
1682
94ad5692b3a7
6784849: par compact - can fail when to_space is non-empty
jcoomes
parents:
1670
diff
changeset
|
2943 |
|
94ad5692b3a7
6784849: par compact - can fail when to_space is non-empty
jcoomes
parents:
1670
diff
changeset
|
2944 |
#ifdef ASSERT |
94ad5692b3a7
6784849: par compact - can fail when to_space is non-empty
jcoomes
parents:
1670
diff
changeset
|
2945 |
MutableSpace* const src_space = _space_info[src_space_id].space(); |
94ad5692b3a7
6784849: par compact - can fail when to_space is non-empty
jcoomes
parents:
1670
diff
changeset
|
2946 |
HeapWord* const beg_addr = sd.region_to_addr(beg_region); |
94ad5692b3a7
6784849: par compact - can fail when to_space is non-empty
jcoomes
parents:
1670
diff
changeset
|
2947 |
assert(src_space->contains(beg_addr) || beg_addr == src_space->end(), |
94ad5692b3a7
6784849: par compact - can fail when to_space is non-empty
jcoomes
parents:
1670
diff
changeset
|
2948 |
"src_space_id does not match beg_addr"); |
94ad5692b3a7
6784849: par compact - can fail when to_space is non-empty
jcoomes
parents:
1670
diff
changeset
|
2949 |
assert(src_space->contains(end_addr) || end_addr == src_space->end(), |
94ad5692b3a7
6784849: par compact - can fail when to_space is non-empty
jcoomes
parents:
1670
diff
changeset
|
2950 |
"src_space_id does not match end_addr"); |
94ad5692b3a7
6784849: par compact - can fail when to_space is non-empty
jcoomes
parents:
1670
diff
changeset
|
2951 |
#endif // #ifdef ASSERT |
94ad5692b3a7
6784849: par compact - can fail when to_space is non-empty
jcoomes
parents:
1670
diff
changeset
|
2952 |
|
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2953 |
RegionData* const beg = sd.region(beg_region); |
1682
94ad5692b3a7
6784849: par compact - can fail when to_space is non-empty
jcoomes
parents:
1670
diff
changeset
|
2954 |
RegionData* const end = sd.addr_to_region_ptr(sd.region_align_up(end_addr)); |
94ad5692b3a7
6784849: par compact - can fail when to_space is non-empty
jcoomes
parents:
1670
diff
changeset
|
2955 |
|
94ad5692b3a7
6784849: par compact - can fail when to_space is non-empty
jcoomes
parents:
1670
diff
changeset
|
2956 |
// Regions up to new_top() are enqueued if they become available. |
94ad5692b3a7
6784849: par compact - can fail when to_space is non-empty
jcoomes
parents:
1670
diff
changeset
|
2957 |
HeapWord* const new_top = _space_info[src_space_id].new_top(); |
94ad5692b3a7
6784849: par compact - can fail when to_space is non-empty
jcoomes
parents:
1670
diff
changeset
|
2958 |
RegionData* const enqueue_end = |
94ad5692b3a7
6784849: par compact - can fail when to_space is non-empty
jcoomes
parents:
1670
diff
changeset
|
2959 |
sd.addr_to_region_ptr(sd.region_align_up(new_top)); |
94ad5692b3a7
6784849: par compact - can fail when to_space is non-empty
jcoomes
parents:
1670
diff
changeset
|
2960 |
|
94ad5692b3a7
6784849: par compact - can fail when to_space is non-empty
jcoomes
parents:
1670
diff
changeset
|
2961 |
for (RegionData* cur = beg; cur < end; ++cur) { |
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2962 |
assert(cur->data_size() > 0, "region must have live data"); |
1 | 2963 |
cur->decrement_destination_count(); |
1682
94ad5692b3a7
6784849: par compact - can fail when to_space is non-empty
jcoomes
parents:
1670
diff
changeset
|
2964 |
if (cur < enqueue_end && cur->available() && cur->claim()) { |
5918 | 2965 |
cm->push_region(sd.region(cur)); |
1 | 2966 |
} |
2967 |
} |
|
2968 |
} |
|
2969 |
||
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2970 |
size_t PSParallelCompact::next_src_region(MoveAndUpdateClosure& closure, |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2971 |
SpaceId& src_space_id, |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2972 |
HeapWord*& src_space_top, |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2973 |
HeapWord* end_addr) |
1 | 2974 |
{ |
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2975 |
typedef ParallelCompactData::RegionData RegionData; |
1 | 2976 |
|
2977 |
ParallelCompactData& sd = PSParallelCompact::summary_data(); |
|
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2978 |
const size_t region_size = ParallelCompactData::RegionSize; |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2979 |
|
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2980 |
size_t src_region_idx = 0; |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2981 |
|
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2982 |
// Skip empty regions (if any) up to the top of the space. |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2983 |
HeapWord* const src_aligned_up = sd.region_align_up(end_addr); |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2984 |
RegionData* src_region_ptr = sd.addr_to_region_ptr(src_aligned_up); |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2985 |
HeapWord* const top_aligned_up = sd.region_align_up(src_space_top); |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2986 |
const RegionData* const top_region_ptr = |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2987 |
sd.addr_to_region_ptr(top_aligned_up); |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2988 |
while (src_region_ptr < top_region_ptr && src_region_ptr->data_size() == 0) { |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2989 |
++src_region_ptr; |
1 | 2990 |
} |
2991 |
||
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2992 |
if (src_region_ptr < top_region_ptr) { |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2993 |
// The next source region is in the current space. Update src_region_idx |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2994 |
// and the source address to match src_region_ptr. |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2995 |
src_region_idx = sd.region(src_region_ptr); |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2996 |
HeapWord* const src_region_addr = sd.region_to_addr(src_region_idx); |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2997 |
if (src_region_addr > closure.source()) { |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2998 |
closure.set_source(src_region_addr); |
1 | 2999 |
} |
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
3000 |
return src_region_idx; |
1 | 3001 |
} |
3002 |
||
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
3003 |
// Switch to a new source space and find the first non-empty region. |
1 | 3004 |
unsigned int space_id = src_space_id + 1; |
3005 |
assert(space_id < last_space_id, "not enough spaces"); |
|
3006 |
||
3007 |
HeapWord* const destination = closure.destination(); |
|
3008 |
||
3009 |
do { |
|
3010 |
MutableSpace* space = _space_info[space_id].space(); |
|
3011 |
HeapWord* const bottom = space->bottom(); |
|
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
3012 |
const RegionData* const bottom_cp = sd.addr_to_region_ptr(bottom); |
1 | 3013 |
|
3014 |
// Iterate over the spaces that do not compact into themselves. |
|
3015 |
if (bottom_cp->destination() != bottom) { |
|
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
3016 |
HeapWord* const top_aligned_up = sd.region_align_up(space->top()); |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
3017 |
const RegionData* const top_cp = sd.addr_to_region_ptr(top_aligned_up); |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
3018 |
|
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
3019 |
for (const RegionData* src_cp = bottom_cp; src_cp < top_cp; ++src_cp) { |
1 | 3020 |
if (src_cp->live_obj_size() > 0) { |
3021 |
// Found it. |
|
3022 |
assert(src_cp->destination() == destination, |
|
3023 |
"first live obj in the space must match the destination"); |
|
3024 |
assert(src_cp->partial_obj_size() == 0, |
|
3025 |
"a space cannot begin with a partial obj"); |
|
3026 |
||
3027 |
src_space_id = SpaceId(space_id); |
|
3028 |
src_space_top = space->top(); |
|
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
3029 |
const size_t src_region_idx = sd.region(src_cp); |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
3030 |
closure.set_source(sd.region_to_addr(src_region_idx)); |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
3031 |
return src_region_idx; |
1 | 3032 |
} else { |
3033 |
assert(src_cp->data_size() == 0, "sanity"); |
|
3034 |
} |
|
3035 |
} |
|
3036 |
} |
|
3037 |
} while (++space_id < last_space_id); |
|
3038 |
||
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
3039 |
assert(false, "no source region was found"); |
1 | 3040 |
return 0; |
3041 |
} |
|
3042 |
||
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
3043 |
void PSParallelCompact::fill_region(ParCompactionManager* cm, size_t region_idx) |
1 | 3044 |
{ |
3045 |
typedef ParMarkBitMap::IterationStatus IterationStatus; |
|
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
3046 |
const size_t RegionSize = ParallelCompactData::RegionSize; |
1 | 3047 |
ParMarkBitMap* const bitmap = mark_bitmap(); |
3048 |
ParallelCompactData& sd = summary_data(); |
|
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
3049 |
RegionData* const region_ptr = sd.region(region_idx); |
1 | 3050 |
|
3051 |
// Get the items needed to construct the closure. |
|
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
3052 |
HeapWord* dest_addr = sd.region_to_addr(region_idx); |
1 | 3053 |
SpaceId dest_space_id = space_id(dest_addr); |
3054 |
ObjectStartArray* start_array = _space_info[dest_space_id].start_array(); |
|
3055 |
HeapWord* new_top = _space_info[dest_space_id].new_top(); |
|
3056 |
assert(dest_addr < new_top, "sanity"); |
|
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
3057 |
const size_t words = MIN2(pointer_delta(new_top, dest_addr), RegionSize); |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
3058 |
|
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
3059 |
// Get the source region and related info. |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
3060 |
size_t src_region_idx = region_ptr->source_region(); |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
3061 |
SpaceId src_space_id = space_id(sd.region_to_addr(src_region_idx)); |
1 | 3062 |
HeapWord* src_space_top = _space_info[src_space_id].space()->top(); |
3063 |
||
3064 |
MoveAndUpdateClosure closure(bitmap, cm, start_array, dest_addr, words); |
|
1669
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
3065 |
closure.set_source(first_src_addr(dest_addr, src_space_id, src_region_idx)); |
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
3066 |
|
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
3067 |
// Adjust src_region_idx to prepare for decrementing destination counts (the |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
3068 |
// destination count is not decremented when a region is copied to itself). |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
3069 |
if (src_region_idx == region_idx) { |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
3070 |
src_region_idx += 1; |
1 | 3071 |
} |
3072 |
||
3073 |
if (bitmap->is_unmarked(closure.source())) { |
|
3074 |
// The first source word is in the middle of an object; copy the remainder |
|
3075 |
// of the object or as much as will fit. The fact that pointer updates were |
|
3076 |
// deferred will be noted when the object header is processed. |
|
3077 |
HeapWord* const old_src_addr = closure.source(); |
|
3078 |
closure.copy_partial_obj(); |
|
3079 |
if (closure.is_full()) { |
|
1682
94ad5692b3a7
6784849: par compact - can fail when to_space is non-empty
jcoomes
parents:
1670
diff
changeset
|
3080 |
decrement_destination_counts(cm, src_space_id, src_region_idx, |
94ad5692b3a7
6784849: par compact - can fail when to_space is non-empty
jcoomes
parents:
1670
diff
changeset
|
3081 |
closure.source()); |
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
3082 |
region_ptr->set_deferred_obj_addr(NULL); |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
3083 |
region_ptr->set_completed(); |
1 | 3084 |
return; |
3085 |
} |
|
3086 |
||
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
3087 |
HeapWord* const end_addr = sd.region_align_down(closure.source()); |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
3088 |
if (sd.region_align_down(old_src_addr) != end_addr) { |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
3089 |
// The partial object was copied from more than one source region. |
1682
94ad5692b3a7
6784849: par compact - can fail when to_space is non-empty
jcoomes
parents:
1670
diff
changeset
|
3090 |
decrement_destination_counts(cm, src_space_id, src_region_idx, end_addr); |
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
3091 |
|
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
3092 |
// Move to the next source region, possibly switching spaces as well. All |
1 | 3093 |
// args except end_addr may be modified. |
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
3094 |
src_region_idx = next_src_region(closure, src_space_id, src_space_top, |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
3095 |
end_addr); |
1 | 3096 |
} |
3097 |
} |
|
3098 |
||
3099 |
do { |
|
3100 |
HeapWord* const cur_addr = closure.source(); |
|
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
3101 |
HeapWord* const end_addr = MIN2(sd.region_align_up(cur_addr + 1), |
1 | 3102 |
src_space_top); |
3103 |
IterationStatus status = bitmap->iterate(&closure, cur_addr, end_addr); |
|
3104 |
||
3105 |
if (status == ParMarkBitMap::incomplete) { |
|
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
3106 |
// The last obj that starts in the source region does not end in the |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
3107 |
// region. |
5402
c51fd0c1d005
6888953: some calls to function-like macros are missing semicolons
jcoomes
parents:
5343
diff
changeset
|
3108 |
assert(closure.source() < end_addr, "sanity"); |
1 | 3109 |
HeapWord* const obj_beg = closure.source(); |
3110 |
HeapWord* const range_end = MIN2(obj_beg + closure.words_remaining(), |
|
3111 |
src_space_top); |
|
3112 |
HeapWord* const obj_end = bitmap->find_obj_end(obj_beg, range_end); |
|
3113 |
if (obj_end < range_end) { |
|
3114 |
// The end was found; the entire object will fit. |
|
3115 |
status = closure.do_addr(obj_beg, bitmap->obj_size(obj_beg, obj_end)); |
|
3116 |
assert(status != ParMarkBitMap::would_overflow, "sanity"); |
|
3117 |
} else { |
|
3118 |
// The end was not found; the object will not fit. |
|
3119 |
assert(range_end < src_space_top, "obj cannot cross space boundary"); |
|
3120 |
status = ParMarkBitMap::would_overflow; |
|
3121 |
} |
|
3122 |
} |
|
3123 |
||
3124 |
if (status == ParMarkBitMap::would_overflow) { |
|
3125 |
// The last object did not fit. Note that interior oop updates were |
|
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
3126 |
// deferred, then copy enough of the object to fill the region. |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
3127 |
region_ptr->set_deferred_obj_addr(closure.destination()); |
1 | 3128 |
status = closure.copy_until_full(); // copies from closure.source() |
3129 |
||
1682
94ad5692b3a7
6784849: par compact - can fail when to_space is non-empty
jcoomes
parents:
1670
diff
changeset
|
3130 |
decrement_destination_counts(cm, src_space_id, src_region_idx, |
94ad5692b3a7
6784849: par compact - can fail when to_space is non-empty
jcoomes
parents:
1670
diff
changeset
|
3131 |
closure.source()); |
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
3132 |
region_ptr->set_completed(); |
1 | 3133 |
return; |
3134 |
} |
|
3135 |
||
3136 |
if (status == ParMarkBitMap::full) { |
|
1682
94ad5692b3a7
6784849: par compact - can fail when to_space is non-empty
jcoomes
parents:
1670
diff
changeset
|
3137 |
decrement_destination_counts(cm, src_space_id, src_region_idx, |
94ad5692b3a7
6784849: par compact - can fail when to_space is non-empty
jcoomes
parents:
1670
diff
changeset
|
3138 |
closure.source()); |
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
3139 |
region_ptr->set_deferred_obj_addr(NULL); |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
3140 |
region_ptr->set_completed(); |
1 | 3141 |
return; |
3142 |
} |
|
3143 |
||
1682
94ad5692b3a7
6784849: par compact - can fail when to_space is non-empty
jcoomes
parents:
1670
diff
changeset
|
3144 |
decrement_destination_counts(cm, src_space_id, src_region_idx, end_addr); |
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
3145 |
|
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
3146 |
// Move to the next source region, possibly switching spaces as well. All |
1 | 3147 |
// args except end_addr may be modified. |
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
3148 |
src_region_idx = next_src_region(closure, src_space_id, src_space_top, |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
3149 |
end_addr); |
1 | 3150 |
} while (true); |
3151 |
} |
|
3152 |
||
17851
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
3153 |
void PSParallelCompact::fill_blocks(size_t region_idx) |
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
3154 |
{ |
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
3155 |
// Fill in the block table elements for the specified region. Each block |
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
3156 |
// table element holds the number of live words in the region that are to the |
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
3157 |
// left of the first object that starts in the block. Thus only blocks in |
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
3158 |
// which an object starts need to be filled. |
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
3159 |
// |
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
3160 |
// The algorithm scans the section of the bitmap that corresponds to the |
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
3161 |
// region, keeping a running total of the live words. When an object start is |
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
3162 |
// found, if it's the first to start in the block that contains it, the |
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
3163 |
// current total is written to the block table element. |
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
3164 |
const size_t Log2BlockSize = ParallelCompactData::Log2BlockSize; |
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
3165 |
const size_t Log2RegionSize = ParallelCompactData::Log2RegionSize; |
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
3166 |
const size_t RegionSize = ParallelCompactData::RegionSize; |
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
3167 |
|
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
3168 |
ParallelCompactData& sd = summary_data(); |
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
3169 |
const size_t partial_obj_size = sd.region(region_idx)->partial_obj_size(); |
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
3170 |
if (partial_obj_size >= RegionSize) { |
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
3171 |
return; // No objects start in this region. |
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
3172 |
} |
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
3173 |
|
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
3174 |
// Ensure the first loop iteration decides that the block has changed. |
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
3175 |
size_t cur_block = sd.block_count(); |
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
3176 |
|
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
3177 |
const ParMarkBitMap* const bitmap = mark_bitmap(); |
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
3178 |
|
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
3179 |
const size_t Log2BitsPerBlock = Log2BlockSize - LogMinObjAlignment; |
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
3180 |
assert((size_t)1 << Log2BitsPerBlock == |
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
3181 |
bitmap->words_to_bits(ParallelCompactData::BlockSize), "sanity"); |
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
3182 |
|
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
3183 |
size_t beg_bit = bitmap->words_to_bits(region_idx << Log2RegionSize); |
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
3184 |
const size_t range_end = beg_bit + bitmap->words_to_bits(RegionSize); |
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
3185 |
size_t live_bits = bitmap->words_to_bits(partial_obj_size); |
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
3186 |
beg_bit = bitmap->find_obj_beg(beg_bit + live_bits, range_end); |
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
3187 |
while (beg_bit < range_end) { |
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
3188 |
const size_t new_block = beg_bit >> Log2BitsPerBlock; |
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
3189 |
if (new_block != cur_block) { |
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
3190 |
cur_block = new_block; |
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
3191 |
sd.block(cur_block)->set_offset(bitmap->bits_to_words(live_bits)); |
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
3192 |
} |
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
3193 |
|
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
3194 |
const size_t end_bit = bitmap->find_obj_end(beg_bit, range_end); |
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
3195 |
if (end_bit < range_end - 1) { |
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
3196 |
live_bits += end_bit - beg_bit + 1; |
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
3197 |
beg_bit = bitmap->find_obj_beg(end_bit + 1, range_end); |
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
3198 |
} else { |
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
3199 |
return; |
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
3200 |
} |
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
3201 |
} |
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
3202 |
} |
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
3203 |
|
1 | 3204 |
jlong PSParallelCompact::millis_since_last_gc() { |
22551 | 3205 |
// 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:
11178
diff
changeset
|
3206 |
// os::javaTimeMillis() does not guarantee monotonicity. |
e29da6b5622b
7117303: VM uses non-monotonic time source and complains that it is non-monotonic
johnc
parents:
11178
diff
changeset
|
3207 |
jlong now = os::javaTimeNanos() / NANOSECS_PER_MILLISEC; |
e29da6b5622b
7117303: VM uses non-monotonic time source and complains that it is non-monotonic
johnc
parents:
11178
diff
changeset
|
3208 |
jlong ret_val = now - _time_of_last_gc; |
1 | 3209 |
// XXX See note in genCollectedHeap::millis_since_last_gc(). |
3210 |
if (ret_val < 0) { |
|
37073
c39d0903390b
8151605: Change warning() to log_warning(gc) in the GC code
brutisso
parents:
36581
diff
changeset
|
3211 |
NOT_PRODUCT(log_warning(gc)("time warp: " JLONG_FORMAT, ret_val);) |
1 | 3212 |
return 0; |
3213 |
} |
|
3214 |
return ret_val; |
|
3215 |
} |
|
3216 |
||
3217 |
void PSParallelCompact::reset_millis_since_last_gc() { |
|
22551 | 3218 |
// 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:
11178
diff
changeset
|
3219 |
// os::javaTimeMillis() does not guarantee monotonicity. |
e29da6b5622b
7117303: VM uses non-monotonic time source and complains that it is non-monotonic
johnc
parents:
11178
diff
changeset
|
3220 |
_time_of_last_gc = os::javaTimeNanos() / NANOSECS_PER_MILLISEC; |
1 | 3221 |
} |
3222 |
||
3223 |
ParMarkBitMap::IterationStatus MoveAndUpdateClosure::copy_until_full() |
|
3224 |
{ |
|
3225 |
if (source() != destination()) { |
|
1682
94ad5692b3a7
6784849: par compact - can fail when to_space is non-empty
jcoomes
parents:
1670
diff
changeset
|
3226 |
DEBUG_ONLY(PSParallelCompact::check_new_location(source(), destination());) |
1 | 3227 |
Copy::aligned_conjoint_words(source(), destination(), words_remaining()); |
3228 |
} |
|
3229 |
update_state(words_remaining()); |
|
3230 |
assert(is_full(), "sanity"); |
|
3231 |
return ParMarkBitMap::full; |
|
3232 |
} |
|
3233 |
||
3234 |
void MoveAndUpdateClosure::copy_partial_obj() |
|
3235 |
{ |
|
3236 |
size_t words = words_remaining(); |
|
3237 |
||
3238 |
HeapWord* const range_end = MIN2(source() + words, bitmap()->region_end()); |
|
3239 |
HeapWord* const end_addr = bitmap()->find_obj_end(source(), range_end); |
|
3240 |
if (end_addr < range_end) { |
|
3241 |
words = bitmap()->obj_size(source(), end_addr); |
|
3242 |
} |
|
3243 |
||
3244 |
// This test is necessary; if omitted, the pointer updates to a partial object |
|
3245 |
// that crosses the dense prefix boundary could be overwritten. |
|
3246 |
if (source() != destination()) { |
|
1682
94ad5692b3a7
6784849: par compact - can fail when to_space is non-empty
jcoomes
parents:
1670
diff
changeset
|
3247 |
DEBUG_ONLY(PSParallelCompact::check_new_location(source(), destination());) |
1 | 3248 |
Copy::aligned_conjoint_words(source(), destination(), words); |
3249 |
} |
|
3250 |
update_state(words); |
|
3251 |
} |
|
3252 |
||
3253 |
ParMarkBitMapClosure::IterationStatus |
|
3254 |
MoveAndUpdateClosure::do_addr(HeapWord* addr, size_t words) { |
|
3255 |
assert(destination() != NULL, "sanity"); |
|
3256 |
assert(bitmap()->obj_size(addr) == words, "bad size"); |
|
3257 |
||
3258 |
_source = addr; |
|
35877
a2a62511d0f8
8146987: Improve Parallel GC Full GC by caching results of live_words_in_range()
tschatzl
parents:
35862
diff
changeset
|
3259 |
assert(PSParallelCompact::summary_data().calc_new_pointer(source(), compaction_manager()) == |
1 | 3260 |
destination(), "wrong destination"); |
3261 |
||
3262 |
if (words > words_remaining()) { |
|
3263 |
return ParMarkBitMap::would_overflow; |
|
3264 |
} |
|
3265 |
||
3266 |
// The start_array must be updated even if the object is not moving. |
|
3267 |
if (_start_array != NULL) { |
|
3268 |
_start_array->allocate_block(destination()); |
|
3269 |
} |
|
3270 |
||
3271 |
if (destination() != source()) { |
|
1682
94ad5692b3a7
6784849: par compact - can fail when to_space is non-empty
jcoomes
parents:
1670
diff
changeset
|
3272 |
DEBUG_ONLY(PSParallelCompact::check_new_location(source(), destination());) |
1 | 3273 |
Copy::aligned_conjoint_words(source(), destination(), words); |
3274 |
} |
|
3275 |
||
3276 |
oop moved_oop = (oop) destination(); |
|
29792
8c6fa07f0869
8075957: Reduce calls to the GC specific object visitors in oopDesc
stefank
parents:
29325
diff
changeset
|
3277 |
compaction_manager()->update_contents(moved_oop); |
46968
9119841280f4
8160399: is_oop_or_null involves undefined behavior
coleenp
parents:
46795
diff
changeset
|
3278 |
assert(oopDesc::is_oop_or_null(moved_oop), "Expected an oop or NULL at " PTR_FORMAT, p2i(moved_oop)); |
1 | 3279 |
|
3280 |
update_state(words); |
|
3281 |
assert(destination() == (HeapWord*)moved_oop + moved_oop->size(), "sanity"); |
|
3282 |
return is_full() ? ParMarkBitMap::full : ParMarkBitMap::incomplete; |
|
3283 |
} |
|
3284 |
||
3285 |
UpdateOnlyClosure::UpdateOnlyClosure(ParMarkBitMap* mbm, |
|
3286 |
ParCompactionManager* cm, |
|
3287 |
PSParallelCompact::SpaceId space_id) : |
|
3288 |
ParMarkBitMapClosure(mbm, cm), |
|
3289 |
_space_id(space_id), |
|
3290 |
_start_array(PSParallelCompact::start_array(space_id)) |
|
3291 |
{ |
|
3292 |
} |
|
3293 |
||
3294 |
// Updates the references in the object to their new values. |
|
3295 |
ParMarkBitMapClosure::IterationStatus |
|
3296 |
UpdateOnlyClosure::do_addr(HeapWord* addr, size_t words) { |
|
3297 |
do_addr(addr); |
|
3298 |
return ParMarkBitMap::incomplete; |
|
3299 |
} |
|
35862
411842d0c882
8146395: Add inline qualifier in oop.hpp and fix inlining in gc files
goetz
parents:
35492
diff
changeset
|
3300 |
|
46502
116a09d8f142
8180755: Remove use of bitMap.inline.hpp include from instanceKlass.hpp and c1_ValueSet.hpp
tschatzl
parents:
42650
diff
changeset
|
3301 |
FillClosure::FillClosure(ParCompactionManager* cm, PSParallelCompact::SpaceId space_id) : |
116a09d8f142
8180755: Remove use of bitMap.inline.hpp include from instanceKlass.hpp and c1_ValueSet.hpp
tschatzl
parents:
42650
diff
changeset
|
3302 |
ParMarkBitMapClosure(PSParallelCompact::mark_bitmap(), cm), |
116a09d8f142
8180755: Remove use of bitMap.inline.hpp include from instanceKlass.hpp and c1_ValueSet.hpp
tschatzl
parents:
42650
diff
changeset
|
3303 |
_start_array(PSParallelCompact::start_array(space_id)) |
116a09d8f142
8180755: Remove use of bitMap.inline.hpp include from instanceKlass.hpp and c1_ValueSet.hpp
tschatzl
parents:
42650
diff
changeset
|
3304 |
{ |
116a09d8f142
8180755: Remove use of bitMap.inline.hpp include from instanceKlass.hpp and c1_ValueSet.hpp
tschatzl
parents:
42650
diff
changeset
|
3305 |
assert(space_id == PSParallelCompact::old_space_id, |
116a09d8f142
8180755: Remove use of bitMap.inline.hpp include from instanceKlass.hpp and c1_ValueSet.hpp
tschatzl
parents:
42650
diff
changeset
|
3306 |
"cannot use FillClosure in the young gen"); |
116a09d8f142
8180755: Remove use of bitMap.inline.hpp include from instanceKlass.hpp and c1_ValueSet.hpp
tschatzl
parents:
42650
diff
changeset
|
3307 |
} |
116a09d8f142
8180755: Remove use of bitMap.inline.hpp include from instanceKlass.hpp and c1_ValueSet.hpp
tschatzl
parents:
42650
diff
changeset
|
3308 |
|
35862
411842d0c882
8146395: Add inline qualifier in oop.hpp and fix inlining in gc files
goetz
parents:
35492
diff
changeset
|
3309 |
ParMarkBitMapClosure::IterationStatus |
411842d0c882
8146395: Add inline qualifier in oop.hpp and fix inlining in gc files
goetz
parents:
35492
diff
changeset
|
3310 |
FillClosure::do_addr(HeapWord* addr, size_t size) { |
411842d0c882
8146395: Add inline qualifier in oop.hpp and fix inlining in gc files
goetz
parents:
35492
diff
changeset
|
3311 |
CollectedHeap::fill_with_objects(addr, size); |
411842d0c882
8146395: Add inline qualifier in oop.hpp and fix inlining in gc files
goetz
parents:
35492
diff
changeset
|
3312 |
HeapWord* const end = addr + size; |
411842d0c882
8146395: Add inline qualifier in oop.hpp and fix inlining in gc files
goetz
parents:
35492
diff
changeset
|
3313 |
do { |
411842d0c882
8146395: Add inline qualifier in oop.hpp and fix inlining in gc files
goetz
parents:
35492
diff
changeset
|
3314 |
_start_array->allocate_block(addr); |
411842d0c882
8146395: Add inline qualifier in oop.hpp and fix inlining in gc files
goetz
parents:
35492
diff
changeset
|
3315 |
addr += oop(addr)->size(); |
411842d0c882
8146395: Add inline qualifier in oop.hpp and fix inlining in gc files
goetz
parents:
35492
diff
changeset
|
3316 |
} while (addr < end); |
411842d0c882
8146395: Add inline qualifier in oop.hpp and fix inlining in gc files
goetz
parents:
35492
diff
changeset
|
3317 |
return ParMarkBitMap::incomplete; |
411842d0c882
8146395: Add inline qualifier in oop.hpp and fix inlining in gc files
goetz
parents:
35492
diff
changeset
|
3318 |
} |