author | stefank |
Thu, 22 Feb 2018 18:36:07 +0100 | |
changeset 49047 | 8f004146e407 |
parent 49041 | 44122f767467 |
child 49164 | 7e958a8ebcd3 |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2005, 2018, 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/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/gcTaskManager.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/pcTasks.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/psMarkSweep.hpp" |
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#include "gc/parallel/psMarkSweepDecorator.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/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.inline.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/spaceDecorator.hpp" |
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#include "gc/shared/weakProcessor.hpp" |
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#include "logging/log.hpp" |
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#include "memory/resourceArea.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/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/stack.inline.hpp" |
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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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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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} |
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void SplitInfo::clear() |
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{ |
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_src_region_idx = 0; |
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_partial_obj_size = 0; |
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174 |
_destination = NULL; |
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_destination_count = 0; |
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176 |
_dest_region_addr = NULL; |
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_first_src_addr = NULL; |
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|
178 |
assert(!is_valid(), "sanity"); |
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179 |
} |
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180 |
|
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181 |
#ifdef ASSERT |
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182 |
void SplitInfo::verify_clear() |
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183 |
{ |
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184 |
assert(_src_region_idx == 0, "not clear"); |
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185 |
assert(_partial_obj_size == 0, "not clear"); |
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186 |
assert(_destination == NULL, "not clear"); |
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187 |
assert(_destination_count == 0, "not clear"); |
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assert(_dest_region_addr == NULL, "not clear"); |
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assert(_first_src_addr == NULL, "not clear"); |
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190 |
} |
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191 |
#endif // #ifdef ASSERT |
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192 |
|
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193 |
|
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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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} |
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197 |
|
1 | 198 |
#ifndef PRODUCT |
199 |
const char* PSParallelCompact::space_names[] = { |
|
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200 |
"old ", "eden", "from", "to " |
1 | 201 |
}; |
202 |
||
35061 | 203 |
void PSParallelCompact::print_region_ranges() { |
37146 | 204 |
if (!log_develop_is_enabled(Trace, gc, compaction)) { |
35061 | 205 |
return; |
206 |
} |
|
37242 | 207 |
Log(gc, compaction) log; |
35061 | 208 |
ResourceMark rm; |
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LogStream ls(log.trace()); |
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210 |
Universe::print_on(&ls); |
35061 | 211 |
log.trace("space bottom top end new_top"); |
212 |
log.trace("------ ---------- ---------- ---------- ----------"); |
|
1 | 213 |
|
214 |
for (unsigned int id = 0; id < last_space_id; ++id) { |
|
215 |
const MutableSpace* space = _space_info[id].space(); |
|
35061 | 216 |
log.trace("%u %s " |
217 |
SIZE_FORMAT_W(10) " " SIZE_FORMAT_W(10) " " |
|
218 |
SIZE_FORMAT_W(10) " " SIZE_FORMAT_W(10) " ", |
|
219 |
id, space_names[id], |
|
220 |
summary_data().addr_to_region_idx(space->bottom()), |
|
221 |
summary_data().addr_to_region_idx(space->top()), |
|
222 |
summary_data().addr_to_region_idx(space->end()), |
|
223 |
summary_data().addr_to_region_idx(_space_info[id].new_top())); |
|
1 | 224 |
} |
225 |
} |
|
226 |
||
227 |
void |
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228 |
print_generic_summary_region(size_t i, const ParallelCompactData::RegionData* c) |
1 | 229 |
{ |
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230 |
#define REGION_IDX_FORMAT SIZE_FORMAT_W(7) |
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#define REGION_DATA_FORMAT SIZE_FORMAT_W(5) |
1 | 232 |
|
233 |
ParallelCompactData& sd = PSParallelCompact::summary_data(); |
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234 |
size_t dci = c->destination() ? sd.addr_to_region_idx(c->destination()) : 0; |
37146 | 235 |
log_develop_trace(gc, compaction)( |
35061 | 236 |
REGION_IDX_FORMAT " " PTR_FORMAT " " |
237 |
REGION_IDX_FORMAT " " PTR_FORMAT " " |
|
238 |
REGION_DATA_FORMAT " " REGION_DATA_FORMAT " " |
|
239 |
REGION_DATA_FORMAT " " REGION_IDX_FORMAT " %d", |
|
240 |
i, p2i(c->data_location()), dci, p2i(c->destination()), |
|
241 |
c->partial_obj_size(), c->live_obj_size(), |
|
242 |
c->data_size(), c->source_region(), c->destination_count()); |
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243 |
|
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244 |
#undef REGION_IDX_FORMAT |
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245 |
#undef REGION_DATA_FORMAT |
1 | 246 |
} |
247 |
||
248 |
void |
|
249 |
print_generic_summary_data(ParallelCompactData& summary_data, |
|
250 |
HeapWord* const beg_addr, |
|
251 |
HeapWord* const end_addr) |
|
252 |
{ |
|
253 |
size_t total_words = 0; |
|
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size_t i = summary_data.addr_to_region_idx(beg_addr); |
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const size_t last = summary_data.addr_to_region_idx(end_addr); |
1 | 256 |
HeapWord* pdest = 0; |
257 |
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while (i < last) { |
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259 |
ParallelCompactData::RegionData* c = summary_data.region(i); |
1 | 260 |
if (c->data_size() != 0 || c->destination() != pdest) { |
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261 |
print_generic_summary_region(i, c); |
1 | 262 |
total_words += c->data_size(); |
263 |
pdest = c->destination(); |
|
264 |
} |
|
265 |
++i; |
|
266 |
} |
|
267 |
||
37146 | 268 |
log_develop_trace(gc, compaction)("summary_data_bytes=" SIZE_FORMAT, total_words * HeapWordSize); |
1 | 269 |
} |
270 |
||
271 |
void |
|
42638 | 272 |
PSParallelCompact::print_generic_summary_data(ParallelCompactData& summary_data, |
273 |
HeapWord* const beg_addr, |
|
274 |
HeapWord* const end_addr) { |
|
275 |
::print_generic_summary_data(summary_data,beg_addr, end_addr); |
|
276 |
} |
|
277 |
||
278 |
void |
|
1 | 279 |
print_generic_summary_data(ParallelCompactData& summary_data, |
280 |
SpaceInfo* space_info) |
|
281 |
{ |
|
37146 | 282 |
if (!log_develop_is_enabled(Trace, gc, compaction)) { |
35061 | 283 |
return; |
284 |
} |
|
285 |
||
1 | 286 |
for (unsigned int id = 0; id < PSParallelCompact::last_space_id; ++id) { |
287 |
const MutableSpace* space = space_info[id].space(); |
|
288 |
print_generic_summary_data(summary_data, space->bottom(), |
|
289 |
MAX2(space->top(), space_info[id].new_top())); |
|
290 |
} |
|
291 |
} |
|
292 |
||
293 |
void |
|
294 |
print_initial_summary_data(ParallelCompactData& summary_data, |
|
295 |
const MutableSpace* space) { |
|
296 |
if (space->top() == space->bottom()) { |
|
297 |
return; |
|
298 |
} |
|
299 |
||
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300 |
const size_t region_size = ParallelCompactData::RegionSize; |
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typedef ParallelCompactData::RegionData RegionData; |
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HeapWord* const top_aligned_up = summary_data.region_align_up(space->top()); |
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const size_t end_region = summary_data.addr_to_region_idx(top_aligned_up); |
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304 |
const RegionData* c = summary_data.region(end_region - 1); |
1 | 305 |
HeapWord* end_addr = c->destination() + c->data_size(); |
306 |
const size_t live_in_space = pointer_delta(end_addr, space->bottom()); |
|
307 |
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308 |
// Print (and count) the full regions at the beginning of the space. |
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|
309 |
size_t full_region_count = 0; |
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|
310 |
size_t i = summary_data.addr_to_region_idx(space->bottom()); |
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|
311 |
while (i < end_region && summary_data.region(i)->data_size() == region_size) { |
35061 | 312 |
ParallelCompactData::RegionData* c = summary_data.region(i); |
37146 | 313 |
log_develop_trace(gc, compaction)( |
35061 | 314 |
SIZE_FORMAT_W(5) " " PTR_FORMAT " " SIZE_FORMAT_W(5) " " SIZE_FORMAT_W(5) " " SIZE_FORMAT_W(5) " " SIZE_FORMAT_W(5) " %d", |
315 |
i, p2i(c->destination()), |
|
316 |
c->partial_obj_size(), c->live_obj_size(), |
|
317 |
c->data_size(), c->source_region(), c->destination_count()); |
|
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|
318 |
++full_region_count; |
1 | 319 |
++i; |
320 |
} |
|
321 |
||
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|
322 |
size_t live_to_right = live_in_space - full_region_count * region_size; |
1 | 323 |
|
324 |
double max_reclaimed_ratio = 0.0; |
|
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|
325 |
size_t max_reclaimed_ratio_region = 0; |
1 | 326 |
size_t max_dead_to_right = 0; |
327 |
size_t max_live_to_right = 0; |
|
328 |
||
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|
329 |
// Print the 'reclaimed ratio' for regions while there is something live in |
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|
330 |
// the region or to the right of it. The remaining regions are empty (and |
1 | 331 |
// uninteresting), and computing the ratio will result in division by 0. |
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|
332 |
while (i < end_region && live_to_right > 0) { |
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|
333 |
c = summary_data.region(i); |
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|
334 |
HeapWord* const region_addr = summary_data.region_to_addr(i); |
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|
335 |
const size_t used_to_right = pointer_delta(space->top(), region_addr); |
1 | 336 |
const size_t dead_to_right = used_to_right - live_to_right; |
337 |
const double reclaimed_ratio = double(dead_to_right) / live_to_right; |
|
338 |
||
339 |
if (reclaimed_ratio > max_reclaimed_ratio) { |
|
340 |
max_reclaimed_ratio = reclaimed_ratio; |
|
1407
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|
341 |
max_reclaimed_ratio_region = i; |
1 | 342 |
max_dead_to_right = dead_to_right; |
343 |
max_live_to_right = live_to_right; |
|
344 |
} |
|
345 |
||
35061 | 346 |
ParallelCompactData::RegionData* c = summary_data.region(i); |
37146 | 347 |
log_develop_trace(gc, compaction)( |
35061 | 348 |
SIZE_FORMAT_W(5) " " PTR_FORMAT " " SIZE_FORMAT_W(5) " " SIZE_FORMAT_W(5) " " SIZE_FORMAT_W(5) " " SIZE_FORMAT_W(5) " %d" |
349 |
"%12.10f " SIZE_FORMAT_W(10) " " SIZE_FORMAT_W(10), |
|
350 |
i, p2i(c->destination()), |
|
351 |
c->partial_obj_size(), c->live_obj_size(), |
|
352 |
c->data_size(), c->source_region(), c->destination_count(), |
|
353 |
reclaimed_ratio, dead_to_right, live_to_right); |
|
354 |
||
1 | 355 |
|
356 |
live_to_right -= c->data_size(); |
|
357 |
++i; |
|
358 |
} |
|
359 |
||
1407
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|
360 |
// Any remaining regions are empty. Print one more if there is one. |
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|
361 |
if (i < end_region) { |
35061 | 362 |
ParallelCompactData::RegionData* c = summary_data.region(i); |
37146 | 363 |
log_develop_trace(gc, compaction)( |
35061 | 364 |
SIZE_FORMAT_W(5) " " PTR_FORMAT " " SIZE_FORMAT_W(5) " " SIZE_FORMAT_W(5) " " SIZE_FORMAT_W(5) " " SIZE_FORMAT_W(5) " %d", |
365 |
i, p2i(c->destination()), |
|
366 |
c->partial_obj_size(), c->live_obj_size(), |
|
367 |
c->data_size(), c->source_region(), c->destination_count()); |
|
1 | 368 |
} |
369 |
||
37146 | 370 |
log_develop_trace(gc, compaction)("max: " SIZE_FORMAT_W(4) " d2r=" SIZE_FORMAT_W(10) " l2r=" SIZE_FORMAT_W(10) " max_ratio=%14.12f", |
371 |
max_reclaimed_ratio_region, max_dead_to_right, max_live_to_right, max_reclaimed_ratio); |
|
1 | 372 |
} |
373 |
||
374 |
void |
|
375 |
print_initial_summary_data(ParallelCompactData& summary_data, |
|
376 |
SpaceInfo* space_info) { |
|
37146 | 377 |
if (!log_develop_is_enabled(Trace, gc, compaction)) { |
35061 | 378 |
return; |
379 |
} |
|
380 |
||
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|
381 |
unsigned int id = PSParallelCompact::old_space_id; |
1 | 382 |
const MutableSpace* space; |
383 |
do { |
|
384 |
space = space_info[id].space(); |
|
385 |
print_initial_summary_data(summary_data, space); |
|
386 |
} while (++id < PSParallelCompact::eden_space_id); |
|
387 |
||
388 |
do { |
|
389 |
space = space_info[id].space(); |
|
390 |
print_generic_summary_data(summary_data, space->bottom(), space->top()); |
|
391 |
} while (++id < PSParallelCompact::last_space_id); |
|
392 |
} |
|
393 |
#endif // #ifndef PRODUCT |
|
394 |
||
395 |
#ifdef ASSERT |
|
396 |
size_t add_obj_count; |
|
397 |
size_t add_obj_size; |
|
398 |
size_t mark_bitmap_count; |
|
399 |
size_t mark_bitmap_size; |
|
400 |
#endif // #ifdef ASSERT |
|
401 |
||
402 |
ParallelCompactData::ParallelCompactData() |
|
403 |
{ |
|
404 |
_region_start = 0; |
|
405 |
||
1407
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|
406 |
_region_vspace = 0; |
17627
325871034f2c
7186737: Unable to allocate bit maps or card tables for parallel gc for the requested heap
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|
407 |
_reserved_byte_size = 0; |
1407
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changeset
|
408 |
_region_data = 0; |
9006b01ba3fd
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|
409 |
_region_count = 0; |
17851
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changeset
|
410 |
|
04e698940f8a
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|
411 |
_block_vspace = 0; |
04e698940f8a
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changeset
|
412 |
_block_data = 0; |
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17844
diff
changeset
|
413 |
_block_count = 0; |
1 | 414 |
} |
415 |
||
416 |
bool ParallelCompactData::initialize(MemRegion covered_region) |
|
417 |
{ |
|
418 |
_region_start = covered_region.start(); |
|
419 |
const size_t region_size = covered_region.word_size(); |
|
420 |
DEBUG_ONLY(_region_end = _region_start + region_size;) |
|
421 |
||
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
422 |
assert(region_align_down(_region_start) == _region_start, |
1 | 423 |
"region start not aligned"); |
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
424 |
assert((region_size & RegionSizeOffsetMask) == 0, |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
425 |
"region size not a multiple of RegionSize"); |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
426 |
|
17851
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
427 |
bool result = initialize_region_data(region_size) && initialize_block_data(); |
1 | 428 |
return result; |
429 |
} |
|
430 |
||
431 |
PSVirtualSpace* |
|
432 |
ParallelCompactData::create_vspace(size_t count, size_t element_size) |
|
433 |
{ |
|
434 |
const size_t raw_bytes = count * element_size; |
|
28631 | 435 |
const size_t page_sz = os::page_size_for_region_aligned(raw_bytes, 10); |
1 | 436 |
const size_t granularity = os::vm_allocation_granularity(); |
46619
a3919f5e8d2b
8178499: Remove _ptr_ and _size_ infixes from align functions
stefank
parents:
46560
diff
changeset
|
437 |
_reserved_byte_size = align_up(raw_bytes, MAX2(page_sz, granularity)); |
1 | 438 |
|
439 |
const size_t rs_align = page_sz == (size_t) os::vm_page_size() ? 0 : |
|
440 |
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
|
441 |
ReservedSpace rs(_reserved_byte_size, rs_align, rs_align > 0); |
37462 | 442 |
os::trace_page_sizes("Parallel Compact Data", raw_bytes, raw_bytes, page_sz, rs.base(), |
1 | 443 |
rs.size()); |
13195 | 444 |
|
445 |
MemTracker::record_virtual_memory_type((address)rs.base(), mtGC); |
|
446 |
||
1 | 447 |
PSVirtualSpace* vspace = new PSVirtualSpace(rs, page_sz); |
448 |
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
|
449 |
if (vspace->expand_by(_reserved_byte_size)) { |
1 | 450 |
return vspace; |
451 |
} |
|
452 |
delete vspace; |
|
823
9a5271881bc0
6716785: implicit null checks not triggering with CompressedOops
coleenp
parents:
781
diff
changeset
|
453 |
// Release memory reserved in the space. |
9a5271881bc0
6716785: implicit null checks not triggering with CompressedOops
coleenp
parents:
781
diff
changeset
|
454 |
rs.release(); |
1 | 455 |
} |
456 |
||
457 |
return 0; |
|
458 |
} |
|
459 |
||
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
460 |
bool ParallelCompactData::initialize_region_data(size_t region_size) |
1 | 461 |
{ |
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
462 |
const size_t count = (region_size + RegionSizeOffsetMask) >> Log2RegionSize; |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
463 |
_region_vspace = create_vspace(count, sizeof(RegionData)); |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
464 |
if (_region_vspace != 0) { |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
465 |
_region_data = (RegionData*)_region_vspace->reserved_low_addr(); |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
466 |
_region_count = count; |
1 | 467 |
return true; |
468 |
} |
|
469 |
return false; |
|
470 |
} |
|
471 |
||
17851
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
472 |
bool ParallelCompactData::initialize_block_data() |
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
473 |
{ |
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
474 |
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
|
475 |
const size_t count = _region_count << Log2BlocksPerRegion; |
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
476 |
_block_vspace = create_vspace(count, sizeof(BlockData)); |
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
477 |
if (_block_vspace != 0) { |
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
478 |
_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
|
479 |
_block_count = count; |
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
480 |
return true; |
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
481 |
} |
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
482 |
return false; |
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 |
|
1 | 485 |
void ParallelCompactData::clear() |
486 |
{ |
|
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
487 |
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
|
488 |
memset(_block_data, 0, _block_vspace->committed_size()); |
1 | 489 |
} |
490 |
||
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
491 |
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
|
492 |
assert(beg_region <= _region_count, "beg_region out of range"); |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
493 |
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
|
494 |
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
|
495 |
|
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
496 |
const size_t region_cnt = end_region - beg_region; |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
497 |
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
|
498 |
|
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
499 |
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
|
500 |
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
|
501 |
memset(_block_data + beg_block, 0, block_cnt * sizeof(BlockData)); |
1 | 502 |
} |
503 |
||
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
504 |
HeapWord* ParallelCompactData::partial_obj_end(size_t region_idx) const |
1 | 505 |
{ |
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
506 |
const RegionData* cur_cp = region(region_idx); |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
507 |
const RegionData* const end_cp = region(region_count() - 1); |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
508 |
|
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
509 |
HeapWord* result = region_to_addr(region_idx); |
1 | 510 |
if (cur_cp < end_cp) { |
511 |
do { |
|
512 |
result += cur_cp->partial_obj_size(); |
|
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
513 |
} while (cur_cp->partial_obj_size() == RegionSize && ++cur_cp < end_cp); |
1 | 514 |
} |
515 |
return result; |
|
516 |
} |
|
517 |
||
518 |
void ParallelCompactData::add_obj(HeapWord* addr, size_t len) |
|
519 |
{ |
|
520 |
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
|
521 |
const size_t beg_region = obj_ofs >> Log2RegionSize; |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
522 |
const size_t end_region = (obj_ofs + len - 1) >> Log2RegionSize; |
1 | 523 |
|
47552
8a3599d60996
8186838: Generalize Atomic::inc/dec with templates
eosterlund
parents:
47546
diff
changeset
|
524 |
DEBUG_ONLY(Atomic::inc(&add_obj_count);) |
47634
6a0c42c40cd1
8188220: Remove Atomic::*_ptr() uses and overloads from hotspot
coleenp
parents:
47580
diff
changeset
|
525 |
DEBUG_ONLY(Atomic::add(len, &add_obj_size);) |
1 | 526 |
|
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
527 |
if (beg_region == end_region) { |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
528 |
// All in one region. |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
529 |
_region_data[beg_region].add_live_obj(len); |
1 | 530 |
return; |
531 |
} |
|
532 |
||
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
533 |
// First region. |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
534 |
const size_t beg_ofs = region_offset(addr); |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
535 |
_region_data[beg_region].add_live_obj(RegionSize - beg_ofs); |
1 | 536 |
|
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13195
diff
changeset
|
537 |
Klass* klass = ((oop)addr)->klass(); |
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
538 |
// Middle regions--completely spanned by this object. |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
539 |
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
|
540 |
_region_data[region].set_partial_obj_size(RegionSize); |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
541 |
_region_data[region].set_partial_obj_addr(addr); |
1 | 542 |
} |
543 |
||
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
544 |
// Last region. |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
545 |
const size_t end_ofs = region_offset(addr + len - 1); |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
546 |
_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
|
547 |
_region_data[end_region].set_partial_obj_addr(addr); |
1 | 548 |
} |
549 |
||
550 |
void |
|
551 |
ParallelCompactData::summarize_dense_prefix(HeapWord* beg, HeapWord* end) |
|
552 |
{ |
|
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
553 |
assert(region_offset(beg) == 0, "not RegionSize aligned"); |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
554 |
assert(region_offset(end) == 0, "not RegionSize aligned"); |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
555 |
|
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
556 |
size_t cur_region = addr_to_region_idx(beg); |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
557 |
const size_t end_region = addr_to_region_idx(end); |
1 | 558 |
HeapWord* addr = beg; |
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
559 |
while (cur_region < end_region) { |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
560 |
_region_data[cur_region].set_destination(addr); |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
561 |
_region_data[cur_region].set_destination_count(0); |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
562 |
_region_data[cur_region].set_source_region(cur_region); |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
563 |
_region_data[cur_region].set_data_location(addr); |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
564 |
|
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
565 |
// Update live_obj_size so the region appears completely full. |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
566 |
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
|
567 |
_region_data[cur_region].set_live_obj_size(live_size); |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
568 |
|
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
569 |
++cur_region; |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
570 |
addr += RegionSize; |
1 | 571 |
} |
572 |
} |
|
573 |
||
1669
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
574 |
// 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
|
575 |
// split point. |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
576 |
// |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
577 |
// 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:
1668
diff
changeset
|
578 |
// 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
|
579 |
// region (an "easy" split, no extra bookkeeping required). |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
580 |
// |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
581 |
// 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
|
582 |
// 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
|
583 |
// 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
|
584 |
// 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
|
585 |
// 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
|
586 |
// 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
|
587 |
// 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
|
588 |
// 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
|
589 |
// split). |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
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diff
changeset
|
590 |
HeapWord* |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
591 |
ParallelCompactData::summarize_split_space(size_t src_region, |
c921639400dd
6765745: par compact - allow young gen spaces to be split
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parents:
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diff
changeset
|
592 |
SplitInfo& split_info, |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
593 |
HeapWord* destination, |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
594 |
HeapWord* target_end, |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
595 |
HeapWord** target_next) |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
596 |
{ |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
597 |
assert(destination <= target_end, "sanity"); |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
598 |
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
|
599 |
"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
|
600 |
assert(is_region_aligned(target_end), "sanity"); |
1669
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
601 |
|
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
602 |
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
|
603 |
HeapWord* split_destination = destination; |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
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diff
changeset
|
604 |
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:
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diff
changeset
|
605 |
|
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
606 |
if (destination + partial_obj_size > target_end) { |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
607 |
// 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
|
608 |
// 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
|
609 |
// destination space. |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
610 |
// |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
611 |
// 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
|
612 |
// region containing it. |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
613 |
HeapWord* const overflow_obj = _region_data[src_region].partial_obj_addr(); |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
614 |
split_region = addr_to_region_idx(overflow_obj); |
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:
1668
diff
changeset
|
616 |
// 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
|
617 |
// came from data after the split point (a non-null source_region field |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
618 |
// implies a region must be filled). |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
619 |
// |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
620 |
// 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
|
621 |
// which uses memcpy instead of individual stores, and is easy to |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
622 |
// parallelize. (The downside is that it clears the entire RegionData |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
623 |
// object as opposed to just one field.) |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
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diff
changeset
|
624 |
// |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
625 |
// post_compact() would have to clear the summary data up to the highest |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
626 |
// address that was written during the summary phase, which would be |
c921639400dd
6765745: par compact - allow young gen spaces to be split
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parents:
1668
diff
changeset
|
627 |
// |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
628 |
// max(top, max(new_top, clear_top)) |
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 |
// 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
parents:
2154
diff
changeset
|
631 |
// to target_end. |
1669
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
632 |
const RegionData* const sr = region(split_region); |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
633 |
const size_t beg_idx = |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
634 |
addr_to_region_idx(region_align_up(sr->destination() + |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
635 |
sr->partial_obj_size())); |
2363
f09f17e0ebc7
6810474: par compact - crash in summary_phase with very full heap
jcoomes
parents:
2154
diff
changeset
|
636 |
const size_t end_idx = addr_to_region_idx(target_end); |
1669
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
637 |
|
37146 | 638 |
log_develop_trace(gc, compaction)("split: clearing source_region field in [" SIZE_FORMAT ", " SIZE_FORMAT ")", beg_idx, end_idx); |
1669
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
639 |
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
|
640 |
_region_data[idx].set_source_region(0); |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
641 |
} |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
642 |
|
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
643 |
// Set split_destination and partial_obj_size to reflect the split region. |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
644 |
split_destination = sr->destination(); |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
645 |
partial_obj_size = sr->partial_obj_size(); |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
646 |
} |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
647 |
|
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
648 |
// 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
|
649 |
if (partial_obj_size != 0) { |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
650 |
_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
|
651 |
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
|
652 |
} |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
653 |
|
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
654 |
// Setup the continuation addresses. |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
655 |
*target_next = split_destination + partial_obj_size; |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
656 |
HeapWord* const source_next = region_to_addr(split_region) + partial_obj_size; |
1 | 657 |
|
37146 | 658 |
if (log_develop_is_enabled(Trace, gc, compaction)) { |
1669
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
659 |
const char * split_type = partial_obj_size == 0 ? "easy" : "hard"; |
37146 | 660 |
log_develop_trace(gc, compaction)("%s split: src=" PTR_FORMAT " src_c=" SIZE_FORMAT " pos=" SIZE_FORMAT, |
661 |
split_type, p2i(source_next), split_region, partial_obj_size); |
|
662 |
log_develop_trace(gc, compaction)("%s split: dst=" PTR_FORMAT " dst_c=" SIZE_FORMAT " tn=" PTR_FORMAT, |
|
663 |
split_type, p2i(split_destination), |
|
664 |
addr_to_region_idx(split_destination), |
|
665 |
p2i(*target_next)); |
|
1669
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
666 |
|
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
667 |
if (partial_obj_size != 0) { |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
668 |
HeapWord* const po_beg = split_info.destination(); |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
669 |
HeapWord* const po_end = po_beg + split_info.partial_obj_size(); |
37146 | 670 |
log_develop_trace(gc, compaction)("%s split: po_beg=" PTR_FORMAT " " SIZE_FORMAT " po_end=" PTR_FORMAT " " SIZE_FORMAT, |
671 |
split_type, |
|
672 |
p2i(po_beg), addr_to_region_idx(po_beg), |
|
673 |
p2i(po_end), addr_to_region_idx(po_end)); |
|
1669
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
674 |
} |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
675 |
} |
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 |
return source_next; |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
678 |
} |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
679 |
|
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
680 |
bool ParallelCompactData::summarize(SplitInfo& split_info, |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
681 |
HeapWord* source_beg, HeapWord* source_end, |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
682 |
HeapWord** source_next, |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
683 |
HeapWord* target_beg, HeapWord* target_end, |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
684 |
HeapWord** target_next) |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
685 |
{ |
35061 | 686 |
HeapWord* const source_next_val = source_next == NULL ? NULL : *source_next; |
37146 | 687 |
log_develop_trace(gc, compaction)( |
35061 | 688 |
"sb=" PTR_FORMAT " se=" PTR_FORMAT " sn=" PTR_FORMAT |
689 |
"tb=" PTR_FORMAT " te=" PTR_FORMAT " tn=" PTR_FORMAT, |
|
690 |
p2i(source_beg), p2i(source_end), p2i(source_next_val), |
|
691 |
p2i(target_beg), p2i(target_end), p2i(*target_next)); |
|
1 | 692 |
|
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
693 |
size_t cur_region = addr_to_region_idx(source_beg); |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
694 |
const size_t end_region = addr_to_region_idx(region_align_up(source_end)); |
1 | 695 |
|
696 |
HeapWord *dest_addr = target_beg; |
|
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
697 |
while (cur_region < end_region) { |
1669
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
698 |
// 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
|
699 |
_region_data[cur_region].set_destination(dest_addr); |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
700 |
|
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
701 |
size_t words = _region_data[cur_region].data_size(); |
1 | 702 |
if (words > 0) { |
1669
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
703 |
// 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
|
704 |
// 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
|
705 |
// target space and the rest is copied elsewhere. |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
706 |
if (dest_addr + words > target_end) { |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
707 |
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
|
708 |
*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
|
709 |
target_end, target_next); |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
710 |
return false; |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
711 |
} |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
712 |
|
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
713 |
// 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
|
714 |
// 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
|
715 |
// 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
|
716 |
// destination region. |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
717 |
// |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
718 |
// 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
|
719 |
// 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
|
720 |
// 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
|
721 |
// available and can be claimed and then filled. |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
722 |
uint destination_count = 0; |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
723 |
if (split_info.is_split(cur_region)) { |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
724 |
// 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
|
725 |
// 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
|
726 |
// 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
|
727 |
// 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
|
728 |
// cross a destination region boundary. |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
729 |
destination_count = split_info.destination_count(); |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
730 |
if (destination_count == 2) { |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
731 |
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
|
732 |
_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
|
733 |
} |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
734 |
} |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
735 |
|
1 | 736 |
HeapWord* const last_addr = dest_addr + words - 1; |
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
737 |
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
|
738 |
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
|
739 |
|
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
740 |
// Initially assume that the destination regions will be the same and |
1 | 741 |
// 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
|
742 |
// 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
|
743 |
// completely into itself. |
1669
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
744 |
destination_count += cur_region == dest_region_2 ? 0 : 1; |
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
745 |
if (dest_region_1 != dest_region_2) { |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
746 |
// Destination regions differ; adjust destination_count. |
1 | 747 |
destination_count += 1; |
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
748 |
// 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
|
749 |
_region_data[dest_region_2].set_source_region(cur_region); |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
750 |
} else if (region_offset(dest_addr) == 0) { |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
751 |
// 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
|
752 |
// region. |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
753 |
_region_data[dest_region_1].set_source_region(cur_region); |
1 | 754 |
} |
755 |
||
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
756 |
_region_data[cur_region].set_destination_count(destination_count); |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
757 |
_region_data[cur_region].set_data_location(region_to_addr(cur_region)); |
1 | 758 |
dest_addr += words; |
759 |
} |
|
760 |
||
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
761 |
++cur_region; |
1 | 762 |
} |
763 |
||
764 |
*target_next = dest_addr; |
|
765 |
return true; |
|
766 |
} |
|
767 |
||
35877
a2a62511d0f8
8146987: Improve Parallel GC Full GC by caching results of live_words_in_range()
tschatzl
parents:
35862
diff
changeset
|
768 |
HeapWord* ParallelCompactData::calc_new_pointer(HeapWord* addr, ParCompactionManager* cm) { |
1 | 769 |
assert(addr != NULL, "Should detect NULL oop earlier"); |
30173
13cf7580b000
8077413: Avoid use of Universe::heap() inside collectors
pliden
parents:
30150
diff
changeset
|
770 |
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
|
771 |
assert(PSParallelCompact::mark_bitmap()->is_marked(addr), "not marked"); |
1 | 772 |
|
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
773 |
// Region covering the object. |
17851
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
774 |
RegionData* const region_ptr = addr_to_region_ptr(addr); |
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
775 |
HeapWord* result = region_ptr->destination(); |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
776 |
|
17851
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
777 |
// 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
|
778 |
// 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
|
779 |
|
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
780 |
// 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
|
781 |
// 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
|
782 |
// 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
|
783 |
// ever implemented, this should be revisited. |
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
784 |
if (region_ptr->data_size() == RegionSize) { |
17851
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
785 |
result += region_offset(addr); |
1 | 786 |
return result; |
787 |
} |
|
788 |
||
17851
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
789 |
// 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
|
790 |
// 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
|
791 |
// 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
|
792 |
|
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
793 |
// 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
|
794 |
// 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
|
795 |
// idempotent). |
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
796 |
if (!region_ptr->blocks_filled()) { |
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
797 |
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
|
798 |
region_ptr->set_blocks_filled(); |
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
799 |
} |
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
800 |
|
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
801 |
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
|
802 |
const size_t block_offset = addr_to_block_ptr(addr)->offset(); |
1 | 803 |
|
804 |
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
|
805 |
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
|
806 |
result += block_offset + live; |
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
807 |
DEBUG_ONLY(PSParallelCompact::check_new_location(addr, result)); |
1 | 808 |
return result; |
809 |
} |
|
810 |
||
17851
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
811 |
#ifdef ASSERT |
1 | 812 |
void ParallelCompactData::verify_clear(const PSVirtualSpace* vspace) |
813 |
{ |
|
814 |
const size_t* const beg = (const size_t*)vspace->committed_low_addr(); |
|
815 |
const size_t* const end = (const size_t*)vspace->committed_high_addr(); |
|
816 |
for (const size_t* p = beg; p < end; ++p) { |
|
817 |
assert(*p == 0, "not zero"); |
|
818 |
} |
|
819 |
} |
|
820 |
||
821 |
void ParallelCompactData::verify_clear() |
|
822 |
{ |
|
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
823 |
verify_clear(_region_vspace); |
17851
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
824 |
verify_clear(_block_vspace); |
1 | 825 |
} |
826 |
#endif // #ifdef ASSERT |
|
827 |
||
18025 | 828 |
STWGCTimer PSParallelCompact::_gc_timer; |
829 |
ParallelOldTracer PSParallelCompact::_gc_tracer; |
|
1 | 830 |
elapsedTimer PSParallelCompact::_accumulated_time; |
831 |
unsigned int PSParallelCompact::_total_invocations = 0; |
|
832 |
unsigned int PSParallelCompact::_maximum_compaction_gc_num = 0; |
|
833 |
jlong PSParallelCompact::_time_of_last_gc = 0; |
|
834 |
CollectorCounters* PSParallelCompact::_counters = NULL; |
|
835 |
ParMarkBitMap PSParallelCompact::_mark_bitmap; |
|
836 |
ParallelCompactData PSParallelCompact::_summary_data; |
|
837 |
||
838 |
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
|
839 |
|
21d113ecbf6a
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
252
diff
changeset
|
840 |
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
|
841 |
|
1 | 842 |
void PSParallelCompact::post_initialize() { |
30173
13cf7580b000
8077413: Avoid use of Universe::heap() inside collectors
pliden
parents:
30150
diff
changeset
|
843 |
ParallelScavengeHeap* heap = ParallelScavengeHeap::heap(); |
1 | 844 |
MemRegion mr = heap->reserved_region(); |
8688
493d12ccc6db
6668573: CMS: reference processing crash if ParallelCMSThreads > ParallelGCThreads
ysr
parents:
8076
diff
changeset
|
845 |
_ref_processor = |
493d12ccc6db
6668573: CMS: reference processing crash if ParallelCMSThreads > ParallelGCThreads
ysr
parents:
8076
diff
changeset
|
846 |
new ReferenceProcessor(mr, // span |
493d12ccc6db
6668573: CMS: reference processing crash if ParallelCMSThreads > ParallelGCThreads
ysr
parents:
8076
diff
changeset
|
847 |
ParallelRefProcEnabled && (ParallelGCThreads > 1), // mt processing |
31330
77061bb01b18
8081382: Make flags ParallelGCThreads and ConcGCThreads of type uint
david
parents:
31032
diff
changeset
|
848 |
ParallelGCThreads, // mt processing degree |
77061bb01b18
8081382: Make flags ParallelGCThreads and ConcGCThreads of type uint
david
parents:
31032
diff
changeset
|
849 |
true, // mt discovery |
77061bb01b18
8081382: Make flags ParallelGCThreads and ConcGCThreads of type uint
david
parents:
31032
diff
changeset
|
850 |
ParallelGCThreads, // mt discovery degree |
77061bb01b18
8081382: Make flags ParallelGCThreads and ConcGCThreads of type uint
david
parents:
31032
diff
changeset
|
851 |
true, // atomic_discovery |
24845
e8b8894a77df
8043239: G1: Missing post barrier in processing of j.l.ref.Reference objects
brutisso
parents:
24429
diff
changeset
|
852 |
&_is_alive_closure); // non-header is alive closure |
1 | 853 |
_counters = new CollectorCounters("PSParallelCompact", 1); |
854 |
||
855 |
// Initialize static fields in ParCompactionManager. |
|
856 |
ParCompactionManager::initialize(mark_bitmap()); |
|
857 |
} |
|
858 |
||
859 |
bool PSParallelCompact::initialize() { |
|
30173
13cf7580b000
8077413: Avoid use of Universe::heap() inside collectors
pliden
parents:
30150
diff
changeset
|
860 |
ParallelScavengeHeap* heap = ParallelScavengeHeap::heap(); |
1 | 861 |
MemRegion mr = heap->reserved_region(); |
862 |
||
863 |
// Was the old gen get allocated successfully? |
|
864 |
if (!heap->old_gen()->is_allocated()) { |
|
865 |
return false; |
|
866 |
} |
|
867 |
||
868 |
initialize_space_info(); |
|
869 |
initialize_dead_wood_limiter(); |
|
870 |
||
871 |
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
|
872 |
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
|
873 |
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
|
874 |
"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
|
875 |
_mark_bitmap.reserved_byte_size()/K, mr.byte_size()/K)); |
1 | 876 |
return false; |
877 |
} |
|
878 |
||
879 |
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
|
880 |
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
|
881 |
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
|
882 |
"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
|
883 |
_summary_data.reserved_byte_size()/K, mr.byte_size()/K)); |
1 | 884 |
return false; |
885 |
} |
|
886 |
||
887 |
return true; |
|
888 |
} |
|
889 |
||
890 |
void PSParallelCompact::initialize_space_info() |
|
891 |
{ |
|
892 |
memset(&_space_info, 0, sizeof(_space_info)); |
|
893 |
||
30173
13cf7580b000
8077413: Avoid use of Universe::heap() inside collectors
pliden
parents:
30150
diff
changeset
|
894 |
ParallelScavengeHeap* heap = ParallelScavengeHeap::heap(); |
1 | 895 |
PSYoungGen* young_gen = heap->young_gen(); |
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13195
diff
changeset
|
896 |
|
1 | 897 |
_space_info[old_space_id].set_space(heap->old_gen()->object_space()); |
898 |
_space_info[eden_space_id].set_space(young_gen->eden_space()); |
|
899 |
_space_info[from_space_id].set_space(young_gen->from_space()); |
|
900 |
_space_info[to_space_id].set_space(young_gen->to_space()); |
|
901 |
||
902 |
_space_info[old_space_id].set_start_array(heap->old_gen()->start_array()); |
|
903 |
} |
|
904 |
||
905 |
void PSParallelCompact::initialize_dead_wood_limiter() |
|
906 |
{ |
|
907 |
const size_t max = 100; |
|
908 |
_dwl_mean = double(MIN2(ParallelOldDeadWoodLimiterMean, max)) / 100.0; |
|
909 |
_dwl_std_dev = double(MIN2(ParallelOldDeadWoodLimiterStdDev, max)) / 100.0; |
|
910 |
_dwl_first_term = 1.0 / (sqrt(2.0 * M_PI) * _dwl_std_dev); |
|
911 |
DEBUG_ONLY(_dwl_initialized = true;) |
|
912 |
_dwl_adjustment = normal_distribution(1.0); |
|
913 |
} |
|
914 |
||
915 |
void |
|
916 |
PSParallelCompact::clear_data_covering_space(SpaceId id) |
|
917 |
{ |
|
918 |
// At this point, top is the value before GC, new_top() is the value that will |
|
919 |
// be set at the end of GC. The marking bitmap is cleared to top; nothing |
|
920 |
// should be marked above top. The summary data is cleared to the larger of |
|
921 |
// top & new_top. |
|
922 |
MutableSpace* const space = _space_info[id].space(); |
|
923 |
HeapWord* const bot = space->bottom(); |
|
924 |
HeapWord* const top = space->top(); |
|
925 |
HeapWord* const max_top = MAX2(top, _space_info[id].new_top()); |
|
926 |
||
927 |
const idx_t beg_bit = _mark_bitmap.addr_to_bit(bot); |
|
928 |
const idx_t end_bit = BitMap::word_align_up(_mark_bitmap.addr_to_bit(top)); |
|
929 |
_mark_bitmap.clear_range(beg_bit, end_bit); |
|
930 |
||
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
931 |
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
|
932 |
const size_t end_region = |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
933 |
_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
|
934 |
_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
|
935 |
|
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
936 |
// Clear the data used to 'split' regions. |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
937 |
SplitInfo& split_info = _space_info[id].split_info(); |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
938 |
if (split_info.is_valid()) { |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
939 |
split_info.clear(); |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
940 |
} |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
941 |
DEBUG_ONLY(split_info.verify_clear();) |
1 | 942 |
} |
943 |
||
35061 | 944 |
void PSParallelCompact::pre_compact() |
1 | 945 |
{ |
946 |
// Update the from & to space pointers in space_info, since they are swapped |
|
947 |
// 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
|
948 |
// promotion failure does not swap spaces) because an unknown number of young |
1 | 949 |
// collections will have swapped the spaces an unknown number of times. |
37146 | 950 |
GCTraceTime(Debug, gc, phases) tm("Pre Compact", &_gc_timer); |
30173
13cf7580b000
8077413: Avoid use of Universe::heap() inside collectors
pliden
parents:
30150
diff
changeset
|
951 |
ParallelScavengeHeap* heap = ParallelScavengeHeap::heap(); |
1 | 952 |
_space_info[from_space_id].set_space(heap->young_gen()->from_space()); |
953 |
_space_info[to_space_id].set_space(heap->young_gen()->to_space()); |
|
954 |
||
955 |
DEBUG_ONLY(add_obj_count = add_obj_size = 0;) |
|
956 |
DEBUG_ONLY(mark_bitmap_count = mark_bitmap_size = 0;) |
|
957 |
||
958 |
// 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
|
959 |
heap->increment_total_collections(true); |
1 | 960 |
|
961 |
// We need to track unique mark sweep invocations as well. |
|
962 |
_total_invocations++; |
|
963 |
||
11636
3c07b54482a5
7141200: log some interesting information in ring buffers for crashes
never
parents:
11251
diff
changeset
|
964 |
heap->print_heap_before_gc(); |
18025 | 965 |
heap->trace_heap_before_gc(&_gc_tracer); |
1 | 966 |
|
967 |
// Fill in TLABs |
|
968 |
heap->accumulate_statistics_all_tlabs(); |
|
969 |
heap->ensure_parsability(true); // retire TLABs |
|
970 |
||
971 |
if (VerifyBeforeGC && heap->total_collections() >= VerifyGCStartAt) { |
|
972 |
HandleMark hm; // Discard invalid handles created during verification |
|
35061 | 973 |
Universe::verify("Before GC"); |
1 | 974 |
} |
975 |
||
976 |
// Verify object start arrays |
|
977 |
if (VerifyObjectStartArray && |
|
978 |
VerifyBeforeGC) { |
|
979 |
heap->old_gen()->verify_object_start_array(); |
|
980 |
} |
|
981 |
||
982 |
DEBUG_ONLY(mark_bitmap()->verify_clear();) |
|
983 |
DEBUG_ONLY(summary_data().verify_clear();) |
|
756 | 984 |
|
985 |
// Have worker threads release resources the next time they run a task. |
|
986 |
gc_task_manager()->release_all_resources(); |
|
35877
a2a62511d0f8
8146987: Improve Parallel GC Full GC by caching results of live_words_in_range()
tschatzl
parents:
35862
diff
changeset
|
987 |
|
a2a62511d0f8
8146987: Improve Parallel GC Full GC by caching results of live_words_in_range()
tschatzl
parents:
35862
diff
changeset
|
988 |
ParCompactionManager::reset_all_bitmap_query_caches(); |
1 | 989 |
} |
990 |
||
991 |
void PSParallelCompact::post_compact() |
|
992 |
{ |
|
37146 | 993 |
GCTraceTime(Info, gc, phases) tm("Post Compact", &_gc_timer); |
1 | 994 |
|
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13195
diff
changeset
|
995 |
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
|
996 |
// Clear the marking bitmap, summary data and split info. |
1 | 997 |
clear_data_covering_space(SpaceId(id)); |
1669
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
998 |
// 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
|
999 |
_space_info[id].publish_new_top(); |
1 | 1000 |
} |
1001 |
||
1002 |
MutableSpace* const eden_space = _space_info[eden_space_id].space(); |
|
1003 |
MutableSpace* const from_space = _space_info[from_space_id].space(); |
|
1004 |
MutableSpace* const to_space = _space_info[to_space_id].space(); |
|
1005 |
||
30173
13cf7580b000
8077413: Avoid use of Universe::heap() inside collectors
pliden
parents:
30150
diff
changeset
|
1006 |
ParallelScavengeHeap* heap = ParallelScavengeHeap::heap(); |
1 | 1007 |
bool eden_empty = eden_space->is_empty(); |
1008 |
if (!eden_empty) { |
|
1009 |
eden_empty = absorb_live_data_from_eden(heap->size_policy(), |
|
1010 |
heap->young_gen(), heap->old_gen()); |
|
1011 |
} |
|
1012 |
||
1013 |
// Update heap occupancy information which is used as input to the soft ref |
|
1014 |
// clearing policy at the next gc. |
|
1015 |
Universe::update_heap_info_at_gc(); |
|
1016 |
||
1017 |
bool young_gen_empty = eden_empty && from_space->is_empty() && |
|
1018 |
to_space->is_empty(); |
|
1019 |
||
29325 | 1020 |
ModRefBarrierSet* modBS = barrier_set_cast<ModRefBarrierSet>(heap->barrier_set()); |
1021 |
MemRegion old_mr = heap->old_gen()->reserved(); |
|
1022 |
if (young_gen_empty) { |
|
1023 |
modBS->clear(MemRegion(old_mr.start(), old_mr.end())); |
|
1024 |
} else { |
|
1025 |
modBS->invalidate(MemRegion(old_mr.start(), old_mr.end())); |
|
1 | 1026 |
} |
1027 |
||
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13195
diff
changeset
|
1028 |
// 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
|
1029 |
ClassLoaderDataGraph::purge(); |
17109
90e6c31bbbe4
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
17105
diff
changeset
|
1030 |
MetaspaceAux::verify_metrics(); |
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13195
diff
changeset
|
1031 |
|
1 | 1032 |
CodeCache::gc_epilogue(); |
7918
ce1e4ae77aea
7012505: BreakpointWithFullGC.sh fails with Internal Error (src/share/vm/oops/methodOop.cpp:220)
kamg
parents:
7397
diff
changeset
|
1033 |
JvmtiExport::gc_epilogue(); |
1 | 1034 |
|
47799 | 1035 |
#if COMPILER2_OR_JVMCI |
33160
c59f1676d27e
8136421: JEP 243: Java-Level JVM Compiler Interface
twisti
parents:
32623
diff
changeset
|
1036 |
DerivedPointerTable::update_pointers(); |
c59f1676d27e
8136421: JEP 243: Java-Level JVM Compiler Interface
twisti
parents:
32623
diff
changeset
|
1037 |
#endif |
1 | 1038 |
|
46795
623a5e42deb6
8173335: Improve logging for j.l.ref.reference processing
sangheki
parents:
46701
diff
changeset
|
1039 |
ReferenceProcessorPhaseTimes pt(&_gc_timer, ref_processor()->num_q()); |
623a5e42deb6
8173335: Improve logging for j.l.ref.reference processing
sangheki
parents:
46701
diff
changeset
|
1040 |
|
623a5e42deb6
8173335: Improve logging for j.l.ref.reference processing
sangheki
parents:
46701
diff
changeset
|
1041 |
ref_processor()->enqueue_discovered_references(NULL, &pt); |
623a5e42deb6
8173335: Improve logging for j.l.ref.reference processing
sangheki
parents:
46701
diff
changeset
|
1042 |
|
623a5e42deb6
8173335: Improve logging for j.l.ref.reference processing
sangheki
parents:
46701
diff
changeset
|
1043 |
pt.print_enqueue_phase(); |
1 | 1044 |
|
971
f0b20be4165d
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
756
diff
changeset
|
1045 |
if (ZapUnusedHeapArea) { |
f0b20be4165d
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
756
diff
changeset
|
1046 |
heap->gen_mangle_unused_area(); |
f0b20be4165d
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
756
diff
changeset
|
1047 |
} |
f0b20be4165d
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
756
diff
changeset
|
1048 |
|
1 | 1049 |
// Update time of last GC |
1050 |
reset_millis_since_last_gc(); |
|
1051 |
} |
|
1052 |
||
1053 |
HeapWord* |
|
1054 |
PSParallelCompact::compute_dense_prefix_via_density(const SpaceId id, |
|
1055 |
bool maximum_compaction) |
|
1056 |
{ |
|
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
1057 |
const size_t region_size = ParallelCompactData::RegionSize; |
1 | 1058 |
const ParallelCompactData& sd = summary_data(); |
1059 |
||
1060 |
const MutableSpace* const space = _space_info[id].space(); |
|
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
1061 |
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
|
1062 |
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
|
1063 |
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
|
1064 |
|
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
1065 |
// Skip full regions at the beginning of the space--they are necessarily part |
1 | 1066 |
// of the dense prefix. |
1067 |
size_t full_count = 0; |
|
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
1068 |
const RegionData* cp; |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
1069 |
for (cp = beg_cp; cp < end_cp && cp->data_size() == region_size; ++cp) { |
1 | 1070 |
++full_count; |
1071 |
} |
|
1072 |
||
1073 |
assert(total_invocations() >= _maximum_compaction_gc_num, "sanity"); |
|
1074 |
const size_t gcs_since_max = total_invocations() - _maximum_compaction_gc_num; |
|
1075 |
const bool interval_ended = gcs_since_max > HeapMaximumCompactionInterval; |
|
1076 |
if (maximum_compaction || cp == end_cp || interval_ended) { |
|
1077 |
_maximum_compaction_gc_num = total_invocations(); |
|
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
1078 |
return sd.region_to_addr(cp); |
1 | 1079 |
} |
1080 |
||
1081 |
HeapWord* const new_top = _space_info[id].new_top(); |
|
1082 |
const size_t space_live = pointer_delta(new_top, space->bottom()); |
|
1083 |
const size_t space_used = space->used_in_words(); |
|
1084 |
const size_t space_capacity = space->capacity_in_words(); |
|
1085 |
||
1086 |
const double cur_density = double(space_live) / space_capacity; |
|
1087 |
const double deadwood_density = |
|
1088 |
(1.0 - cur_density) * (1.0 - cur_density) * cur_density * cur_density; |
|
1089 |
const size_t deadwood_goal = size_t(space_capacity * deadwood_density); |
|
1090 |
||
1091 |
if (TraceParallelOldGCDensePrefix) { |
|
1092 |
tty->print_cr("cur_dens=%5.3f dw_dens=%5.3f dw_goal=" SIZE_FORMAT, |
|
1093 |
cur_density, deadwood_density, deadwood_goal); |
|
1094 |
tty->print_cr("space_live=" SIZE_FORMAT " " "space_used=" SIZE_FORMAT " " |
|
1095 |
"space_cap=" SIZE_FORMAT, |
|
1096 |
space_live, space_used, |
|
1097 |
space_capacity); |
|
1098 |
} |
|
1099 |
||
1100 |
// XXX - Use binary search? |
|
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
1101 |
HeapWord* dense_prefix = sd.region_to_addr(cp); |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
1102 |
const RegionData* full_cp = cp; |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
1103 |
const RegionData* const top_cp = sd.addr_to_region_ptr(space->top() - 1); |
1 | 1104 |
while (cp < end_cp) { |
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
1105 |
HeapWord* region_destination = cp->destination(); |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
1106 |
const size_t cur_deadwood = pointer_delta(dense_prefix, region_destination); |
1 | 1107 |
if (TraceParallelOldGCDensePrefix && Verbose) { |
972
b86fd2f84aaf
6718283: existing uses of *_FORMAT_W() were broken by 6521491
jcoomes
parents:
971
diff
changeset
|
1108 |
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
|
1109 |
"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
|
1110 |
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
|
1111 |
p2i(dense_prefix), cur_deadwood); |
1 | 1112 |
} |
1113 |
||
1114 |
if (cur_deadwood >= deadwood_goal) { |
|
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
1115 |
// 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
|
1116 |
// 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
|
1117 |
// iterate backwards over those sparse regions, looking for the region |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
1118 |
// 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
|
1119 |
size_t space_to_left = sd.region(cp) * region_size; |
1 | 1120 |
size_t live_to_left = space_to_left - cur_deadwood; |
1121 |
size_t space_to_right = space_capacity - space_to_left; |
|
1122 |
size_t live_to_right = space_live - live_to_left; |
|
1123 |
double density_to_right = double(live_to_right) / space_to_right; |
|
1124 |
while (cp > full_cp) { |
|
1125 |
--cp; |
|
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
1126 |
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
|
1127 |
cp->data_size(); |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
1128 |
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
|
1129 |
double prev_region_density_to_right = |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
1130 |
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
|
1131 |
if (density_to_right <= prev_region_density_to_right) { |
1 | 1132 |
return dense_prefix; |
1133 |
} |
|
1134 |
if (TraceParallelOldGCDensePrefix && Verbose) { |
|
972
b86fd2f84aaf
6718283: existing uses of *_FORMAT_W() were broken by 6521491
jcoomes
parents:
971
diff
changeset
|
1135 |
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
|
1136 |
"pc_d2r=%10.8f", sd.region(cp), density_to_right, |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
1137 |
prev_region_density_to_right); |
1 | 1138 |
} |
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
1139 |
dense_prefix -= region_size; |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
1140 |
live_to_right = prev_region_live_to_right; |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
1141 |
space_to_right = prev_region_space_to_right; |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
1142 |
density_to_right = prev_region_density_to_right; |
1 | 1143 |
} |
1144 |
return dense_prefix; |
|
1145 |
} |
|
1146 |
||
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
1147 |
dense_prefix += region_size; |
1 | 1148 |
++cp; |
1149 |
} |
|
1150 |
||
1151 |
return dense_prefix; |
|
1152 |
} |
|
1153 |
||
1154 |
#ifndef PRODUCT |
|
1155 |
void PSParallelCompact::print_dense_prefix_stats(const char* const algorithm, |
|
1156 |
const SpaceId id, |
|
1157 |
const bool maximum_compaction, |
|
1158 |
HeapWord* const addr) |
|
1159 |
{ |
|
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
1160 |
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
|
1161 |
RegionData* const cp = summary_data().region(region_idx); |
1 | 1162 |
const MutableSpace* const space = _space_info[id].space(); |
1163 |
HeapWord* const new_top = _space_info[id].new_top(); |
|
1164 |
||
1165 |
const size_t space_live = pointer_delta(new_top, space->bottom()); |
|
1166 |
const size_t dead_to_left = pointer_delta(addr, cp->destination()); |
|
1167 |
const size_t space_cap = space->capacity_in_words(); |
|
1168 |
const double dead_to_left_pct = double(dead_to_left) / space_cap; |
|
1169 |
const size_t live_to_right = new_top - cp->destination(); |
|
1170 |
const size_t dead_to_right = space->top() - addr - live_to_right; |
|
1171 |
||
972
b86fd2f84aaf
6718283: existing uses of *_FORMAT_W() were broken by 6521491
jcoomes
parents:
971
diff
changeset
|
1172 |
tty->print_cr("%s=" PTR_FORMAT " dpc=" SIZE_FORMAT_W(5) " " |
1 | 1173 |
"spl=" SIZE_FORMAT " " |
1174 |
"d2l=" SIZE_FORMAT " d2l%%=%6.4f " |
|
1175 |
"d2r=" SIZE_FORMAT " l2r=" SIZE_FORMAT |
|
1176 |
" 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
|
1177 |
algorithm, p2i(addr), region_idx, |
1 | 1178 |
space_live, |
1179 |
dead_to_left, dead_to_left_pct, |
|
1180 |
dead_to_right, live_to_right, |
|
1181 |
double(dead_to_right) / live_to_right); |
|
1182 |
} |
|
1183 |
#endif // #ifndef PRODUCT |
|
1184 |
||
1185 |
// Return a fraction indicating how much of the generation can be treated as |
|
1186 |
// "dead wood" (i.e., not reclaimed). The function uses a normal distribution |
|
1187 |
// based on the density of live objects in the generation to determine a limit, |
|
1188 |
// which is then adjusted so the return value is min_percent when the density is |
|
1189 |
// 1. |
|
1190 |
// |
|
1191 |
// The following table shows some return values for a different values of the |
|
1192 |
// standard deviation (ParallelOldDeadWoodLimiterStdDev); the mean is 0.5 and |
|
1193 |
// min_percent is 1. |
|
1194 |
// |
|
1195 |
// fraction allowed as dead wood |
|
1196 |
// ----------------------------------------------------------------- |
|
1197 |
// density std_dev=70 std_dev=75 std_dev=80 std_dev=85 std_dev=90 std_dev=95 |
|
1198 |
// ------- ---------- ---------- ---------- ---------- ---------- ---------- |
|
1199 |
// 0.00000 0.01000000 0.01000000 0.01000000 0.01000000 0.01000000 0.01000000 |
|
1200 |
// 0.05000 0.03193096 0.02836880 0.02550828 0.02319280 0.02130337 0.01974941 |
|
1201 |
// 0.10000 0.05247504 0.04547452 0.03988045 0.03537016 0.03170171 0.02869272 |
|
1202 |
// 0.15000 0.07135702 0.06111390 0.05296419 0.04641639 0.04110601 0.03676066 |
|
1203 |
// 0.20000 0.08831616 0.07509618 0.06461766 0.05622444 0.04943437 0.04388975 |
|
1204 |
// 0.25000 0.10311208 0.08724696 0.07471205 0.06469760 0.05661313 0.05002313 |
|
1205 |
// 0.30000 0.11553050 0.09741183 0.08313394 0.07175114 0.06257797 0.05511132 |
|
1206 |
// 0.35000 0.12538832 0.10545958 0.08978741 0.07731366 0.06727491 0.05911289 |
|
1207 |
// 0.40000 0.13253818 0.11128511 0.09459590 0.08132834 0.07066107 0.06199500 |
|
1208 |
// 0.45000 0.13687208 0.11481163 0.09750361 0.08375387 0.07270534 0.06373386 |
|
1209 |
// 0.50000 0.13832410 0.11599237 0.09847664 0.08456518 0.07338887 0.06431510 |
|
1210 |
// 0.55000 0.13687208 0.11481163 0.09750361 0.08375387 0.07270534 0.06373386 |
|
1211 |
// 0.60000 0.13253818 0.11128511 0.09459590 0.08132834 0.07066107 0.06199500 |
|
1212 |
// 0.65000 0.12538832 0.10545958 0.08978741 0.07731366 0.06727491 0.05911289 |
|
1213 |
// 0.70000 0.11553050 0.09741183 0.08313394 0.07175114 0.06257797 0.05511132 |
|
1214 |
// 0.75000 0.10311208 0.08724696 0.07471205 0.06469760 0.05661313 0.05002313 |
|
1215 |
// 0.80000 0.08831616 0.07509618 0.06461766 0.05622444 0.04943437 0.04388975 |
|
1216 |
// 0.85000 0.07135702 0.06111390 0.05296419 0.04641639 0.04110601 0.03676066 |
|
1217 |
// 0.90000 0.05247504 0.04547452 0.03988045 0.03537016 0.03170171 0.02869272 |
|
1218 |
// 0.95000 0.03193096 0.02836880 0.02550828 0.02319280 0.02130337 0.01974941 |
|
1219 |
// 1.00000 0.01000000 0.01000000 0.01000000 0.01000000 0.01000000 0.01000000 |
|
1220 |
||
1221 |
double PSParallelCompact::dead_wood_limiter(double density, size_t min_percent) |
|
1222 |
{ |
|
1223 |
assert(_dwl_initialized, "uninitialized"); |
|
1224 |
||
1225 |
// The raw limit is the value of the normal distribution at x = density. |
|
1226 |
const double raw_limit = normal_distribution(density); |
|
1227 |
||
1228 |
// Adjust the raw limit so it becomes the minimum when the density is 1. |
|
1229 |
// |
|
1230 |
// First subtract the adjustment value (which is simply the precomputed value |
|
1231 |
// normal_distribution(1.0)); this yields a value of 0 when the density is 1. |
|
1232 |
// Then add the minimum value, so the minimum is returned when the density is |
|
1233 |
// 1. Finally, prevent negative values, which occur when the mean is not 0.5. |
|
1234 |
const double min = double(min_percent) / 100.0; |
|
1235 |
const double limit = raw_limit - _dwl_adjustment + min; |
|
1236 |
return MAX2(limit, 0.0); |
|
1237 |
} |
|
1238 |
||
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
1239 |
ParallelCompactData::RegionData* |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
1240 |
PSParallelCompact::first_dead_space_region(const RegionData* beg, |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
1241 |
const RegionData* end) |
1 | 1242 |
{ |
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
1243 |
const size_t region_size = ParallelCompactData::RegionSize; |
1 | 1244 |
ParallelCompactData& sd = summary_data(); |
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
1245 |
size_t left = sd.region(beg); |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
1246 |
size_t right = end > beg ? sd.region(end) - 1 : left; |
1 | 1247 |
|
1248 |
// Binary search. |
|
1249 |
while (left < right) { |
|
1250 |
// Equivalent to (left + right) / 2, but does not overflow. |
|
1251 |
const size_t middle = left + (right - left) / 2; |
|
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
1252 |
RegionData* const middle_ptr = sd.region(middle); |
1 | 1253 |
HeapWord* const dest = middle_ptr->destination(); |
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
1254 |
HeapWord* const addr = sd.region_to_addr(middle); |
1 | 1255 |
assert(dest != NULL, "sanity"); |
1256 |
assert(dest <= addr, "must move left"); |
|
1257 |
||
1258 |
if (middle > left && dest < addr) { |
|
1259 |
right = middle - 1; |
|
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
1260 |
} else if (middle < right && middle_ptr->data_size() == region_size) { |
1 | 1261 |
left = middle + 1; |
1262 |
} else { |
|
1263 |
return middle_ptr; |
|
1264 |
} |
|
1265 |
} |
|
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
1266 |
return sd.region(left); |
1 | 1267 |
} |
1268 |
||
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
1269 |
ParallelCompactData::RegionData* |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
1270 |
PSParallelCompact::dead_wood_limit_region(const RegionData* beg, |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
1271 |
const RegionData* end, |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
1272 |
size_t dead_words) |
1 | 1273 |
{ |
1274 |
ParallelCompactData& sd = summary_data(); |
|
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
1275 |
size_t left = sd.region(beg); |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
1276 |
size_t right = end > beg ? sd.region(end) - 1 : left; |
1 | 1277 |
|
1278 |
// Binary search. |
|
1279 |
while (left < right) { |
|
1280 |
// Equivalent to (left + right) / 2, but does not overflow. |
|
1281 |
const size_t middle = left + (right - left) / 2; |
|
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
1282 |
RegionData* const middle_ptr = sd.region(middle); |
1 | 1283 |
HeapWord* const dest = middle_ptr->destination(); |
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
1284 |
HeapWord* const addr = sd.region_to_addr(middle); |
1 | 1285 |
assert(dest != NULL, "sanity"); |
1286 |
assert(dest <= addr, "must move left"); |
|
1287 |
||
1288 |
const size_t dead_to_left = pointer_delta(addr, dest); |
|
1289 |
if (middle > left && dead_to_left > dead_words) { |
|
1290 |
right = middle - 1; |
|
1291 |
} else if (middle < right && dead_to_left < dead_words) { |
|
1292 |
left = middle + 1; |
|
1293 |
} else { |
|
1294 |
return middle_ptr; |
|
1295 |
} |
|
1296 |
} |
|
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
1297 |
return sd.region(left); |
1 | 1298 |
} |
1299 |
||
1300 |
// The result is valid during the summary phase, after the initial summarization |
|
1301 |
// of each space into itself, and before final summarization. |
|
1302 |
inline double |
|
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
1303 |
PSParallelCompact::reclaimed_ratio(const RegionData* const cp, |
1 | 1304 |
HeapWord* const bottom, |
1305 |
HeapWord* const top, |
|
1306 |
HeapWord* const new_top) |
|
1307 |
{ |
|
1308 |
ParallelCompactData& sd = summary_data(); |
|
1309 |
||
1310 |
assert(cp != NULL, "sanity"); |
|
1311 |
assert(bottom != NULL, "sanity"); |
|
1312 |
assert(top != NULL, "sanity"); |
|
1313 |
assert(new_top != NULL, "sanity"); |
|
1314 |
assert(top >= new_top, "summary data problem?"); |
|
1315 |
assert(new_top > bottom, "space is empty; should not be here"); |
|
1316 |
assert(new_top >= cp->destination(), "sanity"); |
|
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
1317 |
assert(top >= sd.region_to_addr(cp), "sanity"); |
1 | 1318 |
|
1319 |
HeapWord* const destination = cp->destination(); |
|
1320 |
const size_t dense_prefix_live = pointer_delta(destination, bottom); |
|
1321 |
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
|
1322 |
const size_t compacted_region_used = pointer_delta(top, |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
1323 |
sd.region_to_addr(cp)); |
1 | 1324 |
const size_t reclaimable = compacted_region_used - compacted_region_live; |
1325 |
||
1326 |
const double divisor = dense_prefix_live + 1.25 * compacted_region_live; |
|
1327 |
return double(reclaimable) / divisor; |
|
1328 |
} |
|
1329 |
||
1330 |
// 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
|
1331 |
// compacted region. The address is always on a region boundary. |
1 | 1332 |
// |
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
1333 |
// 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
|
1334 |
// 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
|
1335 |
// 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
|
1336 |
// 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
|
1337 |
// 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
|
1338 |
// 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
|
1339 |
// (maximum) reclaimed_ratio() is selected. |
1 | 1340 |
HeapWord* |
1341 |
PSParallelCompact::compute_dense_prefix(const SpaceId id, |
|
1342 |
bool maximum_compaction) |
|
1343 |
{ |
|
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
1344 |
const size_t region_size = ParallelCompactData::RegionSize; |
1 | 1345 |
const ParallelCompactData& sd = summary_data(); |
1346 |
||
1347 |
const MutableSpace* const space = _space_info[id].space(); |
|
1348 |
HeapWord* const top = space->top(); |
|
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
1349 |
HeapWord* const top_aligned_up = sd.region_align_up(top); |
1 | 1350 |
HeapWord* const new_top = _space_info[id].new_top(); |
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
1351 |
HeapWord* const new_top_aligned_up = sd.region_align_up(new_top); |
1 | 1352 |
HeapWord* const bottom = space->bottom(); |
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
1353 |
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
|
1354 |
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
|
1355 |
const RegionData* const new_top_cp = |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
1356 |
sd.addr_to_region_ptr(new_top_aligned_up); |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
1357 |
|
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
1358 |
// Skip full regions at the beginning of the space--they are necessarily part |
1 | 1359 |
// of the dense prefix. |
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
1360 |
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
|
1361 |
assert(full_cp->destination() == sd.region_to_addr(full_cp) || |
1 | 1362 |
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
|
1363 |
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
|
1364 |
"region must have dead space"); |
1 | 1365 |
|
1366 |
// The gc number is saved whenever a maximum compaction is done, and used to |
|
1367 |
// determine when the maximum compaction interval has expired. This avoids |
|
1368 |
// successive max compactions for different reasons. |
|
1369 |
assert(total_invocations() >= _maximum_compaction_gc_num, "sanity"); |
|
1370 |
const size_t gcs_since_max = total_invocations() - _maximum_compaction_gc_num; |
|
1371 |
const bool interval_ended = gcs_since_max > HeapMaximumCompactionInterval || |
|
1372 |
total_invocations() == HeapFirstMaximumCompactionCount; |
|
1373 |
if (maximum_compaction || full_cp == top_cp || interval_ended) { |
|
1374 |
_maximum_compaction_gc_num = total_invocations(); |
|
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
1375 |
return sd.region_to_addr(full_cp); |
1 | 1376 |
} |
1377 |
||
1378 |
const size_t space_live = pointer_delta(new_top, bottom); |
|
1379 |
const size_t space_used = space->used_in_words(); |
|
1380 |
const size_t space_capacity = space->capacity_in_words(); |
|
1381 |
||
1382 |
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
|
1383 |
const size_t min_percent_free = MarkSweepDeadRatio; |
1 | 1384 |
const double limiter = dead_wood_limiter(density, min_percent_free); |
1385 |
const size_t dead_wood_max = space_used - space_live; |
|
1386 |
const size_t dead_wood_limit = MIN2(size_t(space_capacity * limiter), |
|
1387 |
dead_wood_max); |
|
1388 |
||
1389 |
if (TraceParallelOldGCDensePrefix) { |
|
1390 |
tty->print_cr("space_live=" SIZE_FORMAT " " "space_used=" SIZE_FORMAT " " |
|
1391 |
"space_cap=" SIZE_FORMAT, |
|
1392 |
space_live, space_used, |
|
1393 |
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
|
1394 |
tty->print_cr("dead_wood_limiter(%6.4f, " SIZE_FORMAT ")=%6.4f " |
1 | 1395 |
"dead_wood_max=" SIZE_FORMAT " dead_wood_limit=" SIZE_FORMAT, |
1396 |
density, min_percent_free, limiter, |
|
1397 |
dead_wood_max, dead_wood_limit); |
|
1398 |
} |
|
1399 |
||
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
1400 |
// 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
|
1401 |
const RegionData* const limit_cp = |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
1402 |
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
|
1403 |
|
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
1404 |
// Scan from the first region with dead space to the limit region and find the |
1 | 1405 |
// one with the best (largest) reclaimed ratio. |
1406 |
double best_ratio = 0.0; |
|
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
1407 |
const RegionData* best_cp = full_cp; |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
1408 |
for (const RegionData* cp = full_cp; cp < limit_cp; ++cp) { |
1 | 1409 |
double tmp_ratio = reclaimed_ratio(cp, bottom, top, new_top); |
1410 |
if (tmp_ratio > best_ratio) { |
|
1411 |
best_cp = cp; |
|
1412 |
best_ratio = tmp_ratio; |
|
1413 |
} |
|
1414 |
} |
|
1415 |
||
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
1416 |
return sd.region_to_addr(best_cp); |
1 | 1417 |
} |
1418 |
||
1419 |
void PSParallelCompact::summarize_spaces_quick() |
|
1420 |
{ |
|
1421 |
for (unsigned int i = 0; i < last_space_id; ++i) { |
|
1422 |
const MutableSpace* space = _space_info[i].space(); |
|
1669
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
1423 |
HeapWord** nta = _space_info[i].new_top_addr(); |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
1424 |
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
|
1425 |
space->bottom(), space->top(), NULL, |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
1426 |
space->bottom(), space->end(), nta); |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
1427 |
assert(result, "space must fit into itself"); |
1 | 1428 |
_space_info[i].set_dense_prefix(space->bottom()); |
1429 |
} |
|
1430 |
} |
|
1431 |
||
1432 |
void PSParallelCompact::fill_dense_prefix_end(SpaceId id) |
|
1433 |
{ |
|
1434 |
HeapWord* const dense_prefix_end = dense_prefix(id); |
|
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
1435 |
const RegionData* region = _summary_data.addr_to_region_ptr(dense_prefix_end); |
1 | 1436 |
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
|
1437 |
if (dead_space_crosses_boundary(region, dense_prefix_bit)) { |
1 | 1438 |
// Only enough dead space is filled so that any remaining dead space to the |
1439 |
// left is larger than the minimum filler object. (The remainder is filled |
|
1440 |
// during the copy/update phase.) |
|
1441 |
// |
|
1442 |
// The size of the dead space to the right of the boundary is not a |
|
1443 |
// concern, since compaction will be able to use whatever space is |
|
1444 |
// available. |
|
1445 |
// |
|
1446 |
// Here '||' is the boundary, 'x' represents a don't care bit and a box |
|
1447 |
// surrounds the space to be filled with an object. |
|
1448 |
// |
|
1449 |
// In the 32-bit VM, each bit represents two 32-bit words: |
|
1450 |
// +---+ |
|
1451 |
// a) beg_bits: ... x x x | 0 | || 0 x x ... |
|
1452 |
// end_bits: ... x x x | 0 | || 0 x x ... |
|
1453 |
// +---+ |
|
1454 |
// |
|
1455 |
// In the 64-bit VM, each bit represents one 64-bit word: |
|
1456 |
// +------------+ |
|
1457 |
// b) beg_bits: ... x x x | 0 || 0 | x x ... |
|
1458 |
// end_bits: ... x x 1 | 0 || 0 | x x ... |
|
1459 |
// +------------+ |
|
1460 |
// +-------+ |
|
1461 |
// c) beg_bits: ... x x | 0 0 | || 0 x x ... |
|
1462 |
// end_bits: ... x 1 | 0 0 | || 0 x x ... |
|
1463 |
// +-------+ |
|
1464 |
// +-----------+ |
|
1465 |
// d) beg_bits: ... x | 0 0 0 | || 0 x x ... |
|
1466 |
// end_bits: ... 1 | 0 0 0 | || 0 x x ... |
|
1467 |
// +-----------+ |
|
1468 |
// +-------+ |
|
1469 |
// e) beg_bits: ... 0 0 | 0 0 | || 0 x x ... |
|
1470 |
// end_bits: ... 0 0 | 0 0 | || 0 x x ... |
|
1471 |
// +-------+ |
|
1472 |
||
1473 |
// 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
|
1474 |
size_t obj_len = CollectedHeap::min_fill_size(); |
1 | 1475 |
HeapWord* obj_beg = dense_prefix_end - obj_len; |
1476 |
||
1477 |
#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
|
1478 |
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
|
1479 |
// 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
|
1480 |
} else if (_mark_bitmap.is_obj_end(dense_prefix_bit - 2)) { |
1 | 1481 |
// Case b above. |
1482 |
obj_beg = dense_prefix_end - 1; |
|
1483 |
} else if (!_mark_bitmap.is_obj_end(dense_prefix_bit - 3) && |
|
1484 |
_mark_bitmap.is_obj_end(dense_prefix_bit - 4)) { |
|
1485 |
// Case d above. |
|
1486 |
obj_beg = dense_prefix_end - 3; |
|
1487 |
obj_len = 3; |
|
1488 |
} |
|
1489 |
#endif // #ifdef _LP64 |
|
1490 |
||
1669
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
1491 |
CollectedHeap::fill_with_object(obj_beg, obj_len); |
1 | 1492 |
_mark_bitmap.mark_obj(obj_beg, obj_len); |
1493 |
_summary_data.add_obj(obj_beg, obj_len); |
|
1494 |
assert(start_array(id) != NULL, "sanity"); |
|
1495 |
start_array(id)->allocate_block(obj_beg); |
|
1496 |
} |
|
1497 |
} |
|
1498 |
||
1499 |
void |
|
1500 |
PSParallelCompact::summarize_space(SpaceId id, bool maximum_compaction) |
|
1501 |
{ |
|
1502 |
assert(id < last_space_id, "id out of range"); |
|
33227
b00ec45f8c2c
8139277: Remove ScavengeWithObjectsInToSpace, ParallelOldGCSplitALot, ParallelOldGCSplitInterval, PSAdjustTenuredGenForMinorPause and PSAdjustYoungGenForMajorPause
david
parents:
33107
diff
changeset
|
1503 |
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
|
1504 |
"should have been reset in summarize_spaces_quick()"); |
1 | 1505 |
|
1506 |
const MutableSpace* space = _space_info[id].space(); |
|
973
f00c7826d8c6
6483129: par compact assertion failure (new_top > bottom)
jcoomes
parents:
972
diff
changeset
|
1507 |
if (_space_info[id].new_top() != space->bottom()) { |
f00c7826d8c6
6483129: par compact assertion failure (new_top > bottom)
jcoomes
parents:
972
diff
changeset
|
1508 |
HeapWord* dense_prefix_end = compute_dense_prefix(id, maximum_compaction); |
f00c7826d8c6
6483129: par compact assertion failure (new_top > bottom)
jcoomes
parents:
972
diff
changeset
|
1509 |
_space_info[id].set_dense_prefix(dense_prefix_end); |
1 | 1510 |
|
1511 |
#ifndef PRODUCT |
|
973
f00c7826d8c6
6483129: par compact assertion failure (new_top > bottom)
jcoomes
parents:
972
diff
changeset
|
1512 |
if (TraceParallelOldGCDensePrefix) { |
f00c7826d8c6
6483129: par compact assertion failure (new_top > bottom)
jcoomes
parents:
972
diff
changeset
|
1513 |
print_dense_prefix_stats("ratio", id, maximum_compaction, |
f00c7826d8c6
6483129: par compact assertion failure (new_top > bottom)
jcoomes
parents:
972
diff
changeset
|
1514 |
dense_prefix_end); |
f00c7826d8c6
6483129: par compact assertion failure (new_top > bottom)
jcoomes
parents:
972
diff
changeset
|
1515 |
HeapWord* addr = compute_dense_prefix_via_density(id, maximum_compaction); |
f00c7826d8c6
6483129: par compact assertion failure (new_top > bottom)
jcoomes
parents:
972
diff
changeset
|
1516 |
print_dense_prefix_stats("density", id, maximum_compaction, addr); |
f00c7826d8c6
6483129: par compact assertion failure (new_top > bottom)
jcoomes
parents:
972
diff
changeset
|
1517 |
} |
1 | 1518 |
#endif // #ifndef PRODUCT |
1519 |
||
1670
0deb85ea62d5
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
1669
diff
changeset
|
1520 |
// 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
|
1521 |
// 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
|
1522 |
// compacts everything can be left in place. |
973
f00c7826d8c6
6483129: par compact assertion failure (new_top > bottom)
jcoomes
parents:
972
diff
changeset
|
1523 |
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
|
1524 |
// 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
|
1525 |
// 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
|
1526 |
// 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
|
1527 |
// 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
|
1528 |
// 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
|
1529 |
fill_dense_prefix_end(id); |
1669
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
1530 |
|
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
1531 |
// 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
|
1532 |
_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
|
1533 |
_summary_data.summarize(_space_info[id].split_info(), |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
1534 |
dense_prefix_end, space->top(), NULL, |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
1535 |
dense_prefix_end, space->end(), |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
1536 |
_space_info[id].new_top_addr()); |
973
f00c7826d8c6
6483129: par compact assertion failure (new_top > bottom)
jcoomes
parents:
972
diff
changeset
|
1537 |
} |
1 | 1538 |
} |
1539 |
||
37146 | 1540 |
if (log_develop_is_enabled(Trace, gc, compaction)) { |
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
1541 |
const size_t region_size = ParallelCompactData::RegionSize; |
973
f00c7826d8c6
6483129: par compact assertion failure (new_top > bottom)
jcoomes
parents:
972
diff
changeset
|
1542 |
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
|
1543 |
const size_t dp_region = _summary_data.addr_to_region_idx(dense_prefix_end); |
1 | 1544 |
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
|
1545 |
HeapWord* const new_top = _space_info[id].new_top(); |
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
1546 |
const HeapWord* nt_aligned_up = _summary_data.region_align_up(new_top); |
1 | 1547 |
const size_t cr_words = pointer_delta(nt_aligned_up, dense_prefix_end); |
37146 | 1548 |
log_develop_trace(gc, compaction)( |
35061 | 1549 |
"id=%d cap=" SIZE_FORMAT " dp=" PTR_FORMAT " " |
1550 |
"dp_region=" SIZE_FORMAT " " "dp_count=" SIZE_FORMAT " " |
|
1551 |
"cr_count=" SIZE_FORMAT " " "nt=" PTR_FORMAT, |
|
1552 |
id, space->capacity_in_words(), p2i(dense_prefix_end), |
|
1553 |
dp_region, dp_words / region_size, |
|
1554 |
cr_words / region_size, p2i(new_top)); |
|
1 | 1555 |
} |
1556 |
} |
|
1557 |
||
1669
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
1558 |
#ifndef PRODUCT |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
1559 |
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
|
1560 |
HeapWord* dst_beg, HeapWord* dst_end, |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
1561 |
SpaceId src_space_id, |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
1562 |
HeapWord* src_beg, HeapWord* src_end) |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
1563 |
{ |
37146 | 1564 |
log_develop_trace(gc, compaction)( |
35061 | 1565 |
"Summarizing %d [%s] into %d [%s]: " |
1566 |
"src=" PTR_FORMAT "-" PTR_FORMAT " " |
|
1567 |
SIZE_FORMAT "-" SIZE_FORMAT " " |
|
1568 |
"dst=" PTR_FORMAT "-" PTR_FORMAT " " |
|
1569 |
SIZE_FORMAT "-" SIZE_FORMAT, |
|
1570 |
src_space_id, space_names[src_space_id], |
|
1571 |
dst_space_id, space_names[dst_space_id], |
|
1572 |
p2i(src_beg), p2i(src_end), |
|
1573 |
_summary_data.addr_to_region_idx(src_beg), |
|
1574 |
_summary_data.addr_to_region_idx(src_end), |
|
1575 |
p2i(dst_beg), p2i(dst_end), |
|
1576 |
_summary_data.addr_to_region_idx(dst_beg), |
|
1577 |
_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
|
1578 |
} |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
1579 |
#endif // #ifndef PRODUCT |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
1580 |
|
1 | 1581 |
void PSParallelCompact::summary_phase(ParCompactionManager* cm, |
1582 |
bool maximum_compaction) |
|
1583 |
{ |
|
37146 | 1584 |
GCTraceTime(Info, gc, phases) tm("Summary Phase", &_gc_timer); |
1 | 1585 |
|
1586 |
#ifdef ASSERT |
|
1587 |
if (TraceParallelOldGCMarkingPhase) { |
|
1588 |
tty->print_cr("add_obj_count=" SIZE_FORMAT " " |
|
1589 |
"add_obj_bytes=" SIZE_FORMAT, |
|
1590 |
add_obj_count, add_obj_size * HeapWordSize); |
|
1591 |
tty->print_cr("mark_bitmap_count=" SIZE_FORMAT " " |
|
1592 |
"mark_bitmap_bytes=" SIZE_FORMAT, |
|
1593 |
mark_bitmap_count, mark_bitmap_size * HeapWordSize); |
|
1594 |
} |
|
1595 |
#endif // #ifdef ASSERT |
|
1596 |
||
1597 |
// Quick summarization of each space into itself, to see how much is live. |
|
1598 |
summarize_spaces_quick(); |
|
1599 |
||
37146 | 1600 |
log_develop_trace(gc, compaction)("summary phase: after summarizing each space to self"); |
35061 | 1601 |
NOT_PRODUCT(print_region_ranges()); |
1602 |
NOT_PRODUCT(print_initial_summary_data(_summary_data, _space_info)); |
|
1 | 1603 |
|
1604 |
// The amount of live data that will end up in old space (assuming it fits). |
|
1605 |
size_t old_space_total_live = 0; |
|
1669
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
1606 |
for (unsigned int id = old_space_id; id < last_space_id; ++id) { |
1 | 1607 |
old_space_total_live += pointer_delta(_space_info[id].new_top(), |
1608 |
_space_info[id].space()->bottom()); |
|
1609 |
} |
|
1610 |
||
1669
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
1611 |
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
|
1612 |
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
|
1613 |
if (old_space_total_live > old_capacity) { |
1 | 1614 |
// XXX - should also try to expand |
1615 |
maximum_compaction = true; |
|
1616 |
} |
|
1617 |
||
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13195
diff
changeset
|
1618 |
// Old generations. |
1 | 1619 |
summarize_space(old_space_id, maximum_compaction); |
1620 |
||
1669
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
1621 |
// 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
|
1622 |
// 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
|
1623 |
// 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
|
1624 |
// target. |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
1625 |
SpaceId dst_space_id = old_space_id; |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
1626 |
HeapWord* dst_space_end = old_space->end(); |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
1627 |
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
|
1628 |
for (unsigned int id = eden_space_id; id < last_space_id; ++id) { |
1 | 1629 |
const MutableSpace* space = _space_info[id].space(); |
1630 |
const size_t live = pointer_delta(_space_info[id].new_top(), |
|
1631 |
space->bottom()); |
|
1669
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
1632 |
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
|
1633 |
|
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
1634 |
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
|
1635 |
SpaceId(id), space->bottom(), space->top());) |
974
6bbfda0c2a55
6724367: par compact could clear less young gen summary data
jcoomes
parents:
973
diff
changeset
|
1636 |
if (live > 0 && live <= available) { |
1 | 1637 |
// All the live data will fit. |
1669
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
1638 |
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
|
1639 |
space->bottom(), space->top(), |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
1640 |
NULL, |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
1641 |
*new_top_addr, dst_space_end, |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
1642 |
new_top_addr); |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
1643 |
assert(done, "space must fit into old gen"); |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
1644 |
|
974
6bbfda0c2a55
6724367: par compact could clear less young gen summary data
jcoomes
parents:
973
diff
changeset
|
1645 |
// Reset the new_top value for the space. |
6bbfda0c2a55
6724367: par compact could clear less young gen summary data
jcoomes
parents:
973
diff
changeset
|
1646 |
_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
|
1647 |
} else if (live > 0) { |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
1648 |
// 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
|
1649 |
HeapWord* next_src_addr = NULL; |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
1650 |
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
|
1651 |
space->bottom(), space->top(), |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
1652 |
&next_src_addr, |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
1653 |
*new_top_addr, dst_space_end, |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
1654 |
new_top_addr); |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
1655 |
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
|
1656 |
assert(next_src_addr != NULL, "sanity"); |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
1657 |
|
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
1658 |
// 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
|
1659 |
// within the space itself. |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
1660 |
dst_space_id = SpaceId(id); |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
1661 |
dst_space_end = space->end(); |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
1662 |
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
|
1663 |
NOT_PRODUCT(summary_phase_msg(dst_space_id, |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
1664 |
space->bottom(), dst_space_end, |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
1665 |
SpaceId(id), next_src_addr, space->top());) |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
1666 |
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
|
1667 |
next_src_addr, space->top(), |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
1668 |
NULL, |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
1669 |
space->bottom(), dst_space_end, |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
1670 |
new_top_addr); |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
1671 |
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
|
1672 |
assert(*new_top_addr <= space->top(), "usage should not grow"); |
1 | 1673 |
} |
1674 |
} |
|
1675 |
||
37146 | 1676 |
log_develop_trace(gc, compaction)("Summary_phase: after final summarization"); |
35061 | 1677 |
NOT_PRODUCT(print_region_ranges()); |
1678 |
NOT_PRODUCT(print_initial_summary_data(_summary_data, _space_info)); |
|
1 | 1679 |
} |
1680 |
||
1681 |
// This method should contain all heap-specific policy for invoking a full |
|
1682 |
// collection. invoke_no_policy() will only attempt to compact the heap; it |
|
1683 |
// will do nothing further. If we need to bail out for policy reasons, scavenge |
|
1684 |
// before full gc, or any other specialized behavior, it needs to be added here. |
|
1685 |
// |
|
1686 |
// Note that this method should only be called from the vm_thread while at a |
|
1687 |
// safepoint. |
|
5343
95a5c4b89273
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
jmasa
parents:
5076
diff
changeset
|
1688 |
// |
95a5c4b89273
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
jmasa
parents:
5076
diff
changeset
|
1689 |
// Note that the all_soft_refs_clear flag in the collector policy |
95a5c4b89273
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
jmasa
parents:
5076
diff
changeset
|
1690 |
// 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
|
1691 |
// 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
|
1692 |
// are being taken to free space. |
1 | 1693 |
void PSParallelCompact::invoke(bool maximum_heap_compaction) { |
1694 |
assert(SafepointSynchronize::is_at_safepoint(), "should be at safepoint"); |
|
1695 |
assert(Thread::current() == (Thread*)VMThread::vm_thread(), |
|
1696 |
"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
|
1697 |
|
30173
13cf7580b000
8077413: Avoid use of Universe::heap() inside collectors
pliden
parents:
30150
diff
changeset
|
1698 |
ParallelScavengeHeap* heap = ParallelScavengeHeap::heap(); |
1 | 1699 |
GCCause::Cause gc_cause = heap->gc_cause(); |
1700 |
assert(!heap->is_gc_active(), "not reentrant"); |
|
1701 |
||
1702 |
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
|
1703 |
IsGCActiveMark mark; |
95a5c4b89273
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
jmasa
parents:
5076
diff
changeset
|
1704 |
|
95a5c4b89273
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
jmasa
parents:
5076
diff
changeset
|
1705 |
if (ScavengeBeforeFullGC) { |
95a5c4b89273
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
jmasa
parents:
5076
diff
changeset
|
1706 |
PSScavenge::invoke_no_policy(); |
1 | 1707 |
} |
5343
95a5c4b89273
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
jmasa
parents:
5076
diff
changeset
|
1708 |
|
95a5c4b89273
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
jmasa
parents:
5076
diff
changeset
|
1709 |
const bool clear_all_soft_refs = |
49047
8f004146e407
8198515: Extract SoftReferencePolicy code out of CollectorPolicy
stefank
parents:
49041
diff
changeset
|
1710 |
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
|
1711 |
|
95a5c4b89273
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
jmasa
parents:
5076
diff
changeset
|
1712 |
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
|
1713 |
maximum_heap_compaction); |
1 | 1714 |
} |
1715 |
||
1716 |
// This method contains no policy. You should probably |
|
1717 |
// be calling invoke() instead. |
|
11757
cdf6204b114a
7146343: PS invoke methods should indicate the type of gc done
jcoomes
parents:
11636
diff
changeset
|
1718 |
bool PSParallelCompact::invoke_no_policy(bool maximum_heap_compaction) { |
1 | 1719 |
assert(SafepointSynchronize::is_at_safepoint(), "must be at a safepoint"); |
1720 |
assert(ref_processor() != NULL, "Sanity"); |
|
1721 |
||
35492
c8c0273e6b91
8146690: Make all classes in GC follow the naming convention.
david
parents:
35061
diff
changeset
|
1722 |
if (GCLocker::check_active_before_gc()) { |
11757
cdf6204b114a
7146343: PS invoke methods should indicate the type of gc done
jcoomes
parents:
11636
diff
changeset
|
1723 |
return false; |
1 | 1724 |
} |
1725 |
||
30173
13cf7580b000
8077413: Avoid use of Universe::heap() inside collectors
pliden
parents:
30150
diff
changeset
|
1726 |
ParallelScavengeHeap* heap = ParallelScavengeHeap::heap(); |
18025 | 1727 |
|
33107
77bf0d2069a3
8134953: Make the GC ID available in a central place
brutisso
parents:
33105
diff
changeset
|
1728 |
GCIdMark gc_id_mark; |
21767
41eaa9a17059
8028128: Add a type safe alternative for working with counter based data
mgronlun
parents:
20317
diff
changeset
|
1729 |
_gc_timer.register_gc_start(); |
18025 | 1730 |
_gc_tracer.report_gc_start(heap->gc_cause(), _gc_timer.gc_start()); |
1731 |
||
1 | 1732 |
TimeStamp marking_start; |
1733 |
TimeStamp compaction_start; |
|
1734 |
TimeStamp collection_exit; |
|
1735 |
||
1736 |
GCCause::Cause gc_cause = heap->gc_cause(); |
|
1737 |
PSYoungGen* young_gen = heap->young_gen(); |
|
1738 |
PSOldGen* old_gen = heap->old_gen(); |
|
1739 |
PSAdaptiveSizePolicy* size_policy = heap->size_policy(); |
|
1740 |
||
5343
95a5c4b89273
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
jmasa
parents:
5076
diff
changeset
|
1741 |
// The scope of casr should end after code that can change |
95a5c4b89273
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
jmasa
parents:
5076
diff
changeset
|
1742 |
// CollectorPolicy::_should_clear_all_soft_refs. |
95a5c4b89273
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
jmasa
parents:
5076
diff
changeset
|
1743 |
ClearedAllSoftRefs casr(maximum_heap_compaction, |
49047
8f004146e407
8198515: Extract SoftReferencePolicy code out of CollectorPolicy
stefank
parents:
49041
diff
changeset
|
1744 |
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
|
1745 |
|
971
f0b20be4165d
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
756
diff
changeset
|
1746 |
if (ZapUnusedHeapArea) { |
f0b20be4165d
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
756
diff
changeset
|
1747 |
// 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
|
1748 |
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
|
1749 |
} |
f0b20be4165d
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
756
diff
changeset
|
1750 |
|
1 | 1751 |
// Make sure data structures are sane, make the heap parsable, and do other |
1752 |
// miscellaneous bookkeeping. |
|
35061 | 1753 |
pre_compact(); |
1754 |
||
1755 |
PreGCValues pre_gc_values(heap); |
|
1 | 1756 |
|
756 | 1757 |
// Get the compaction manager reserved for the VM thread. |
1758 |
ParCompactionManager* const vmthread_cm = |
|
1759 |
ParCompactionManager::manager_array(gc_task_manager()->workers()); |
|
1760 |
||
1 | 1761 |
{ |
1762 |
ResourceMark rm; |
|
1763 |
HandleMark hm; |
|
1764 |
||
11174
fccee5238e70
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
10670
diff
changeset
|
1765 |
// Set the number of GC threads to be used in this collection |
fccee5238e70
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
10670
diff
changeset
|
1766 |
gc_task_manager()->set_active_gang(); |
fccee5238e70
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
10670
diff
changeset
|
1767 |
gc_task_manager()->task_idle_workers(); |
fccee5238e70
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
10670
diff
changeset
|
1768 |
|
35061 | 1769 |
GCTraceCPUTime tcpu; |
1770 |
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
|
1771 |
|
05df7e64ecfc
8149035: Make the full_gc_dump() calls be recorded as part of the GC
brutisso
parents:
35901
diff
changeset
|
1772 |
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
|
1773 |
|
1 | 1774 |
TraceCollectorStats tcs(counters()); |
48168
cb5d2d4453d0
8191564: Refactor GC related servicability code into GC specific subclasses
rkennke
parents:
47799
diff
changeset
|
1775 |
TraceMemoryManagerStats tms(heap->old_gc_manager(), gc_cause); |
1 | 1776 |
|
47546
64ba55ba8516
8184286: print_tracing_info() does not use Unified Logging for output
sjohanss
parents:
47216
diff
changeset
|
1777 |
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
|
1778 |
accumulated_time()->start(); |
64ba55ba8516
8184286: print_tracing_info() does not use Unified Logging for output
sjohanss
parents:
47216
diff
changeset
|
1779 |
} |
1 | 1780 |
|
1781 |
// Let the size policy know we're starting |
|
1782 |
size_policy->major_collection_begin(); |
|
1783 |
||
1784 |
CodeCache::gc_prologue(); |
|
1785 |
||
47799 | 1786 |
#if COMPILER2_OR_JVMCI |
33160
c59f1676d27e
8136421: JEP 243: Java-Level JVM Compiler Interface
twisti
parents:
32623
diff
changeset
|
1787 |
DerivedPointerTable::clear(); |
c59f1676d27e
8136421: JEP 243: Java-Level JVM Compiler Interface
twisti
parents:
32623
diff
changeset
|
1788 |
#endif |
1 | 1789 |
|
28212
647b7d0efb88
8066827: Remove ReferenceProcessor::clean_up_discovered_references()
kbarrett
parents:
27887
diff
changeset
|
1790 |
ref_processor()->enable_discovery(); |
1610
5dddd195cc86
6778647: snap(), snap_policy() should be renamed setup(), setup_policy()
ysr
parents:
1606
diff
changeset
|
1791 |
ref_processor()->setup_policy(maximum_heap_compaction); |
1 | 1792 |
|
1793 |
bool marked_for_unloading = false; |
|
1794 |
||
1795 |
marking_start.update(); |
|
18025 | 1796 |
marking_phase(vmthread_cm, maximum_heap_compaction, &_gc_tracer); |
1 | 1797 |
|
12630
ddf6ee008138
7166894: Add gc cause to GC logging for all collectors
brutisso
parents:
11757
diff
changeset
|
1798 |
bool max_on_system_gc = UseMaximumCompactionOnSystemGC |
31032
8e72621ca186
8072913: [REDO] GCCause should distinguish jcmd GC.run from System.gc()
ysuenaga
parents:
30876
diff
changeset
|
1799 |
&& GCCause::is_user_requested_gc(gc_cause); |
756 | 1800 |
summary_phase(vmthread_cm, maximum_heap_compaction || max_on_system_gc); |
1 | 1801 |
|
47799 | 1802 |
#if COMPILER2_OR_JVMCI |
33160
c59f1676d27e
8136421: JEP 243: Java-Level JVM Compiler Interface
twisti
parents:
32623
diff
changeset
|
1803 |
assert(DerivedPointerTable::is_active(), "Sanity"); |
c59f1676d27e
8136421: JEP 243: Java-Level JVM Compiler Interface
twisti
parents:
32623
diff
changeset
|
1804 |
DerivedPointerTable::set_active(false); |
c59f1676d27e
8136421: JEP 243: Java-Level JVM Compiler Interface
twisti
parents:
32623
diff
changeset
|
1805 |
#endif |
1 | 1806 |
|
1807 |
// adjust_roots() updates Universe::_intArrayKlassObj which is |
|
1808 |
// 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
|
1809 |
adjust_roots(vmthread_cm); |
1 | 1810 |
|
1811 |
compaction_start.update(); |
|
9178
1a022d4f1bc3
6841742: par compact - remove unused/unsupported options
jcoomes
parents:
8688
diff
changeset
|
1812 |
compact(); |
1 | 1813 |
|
1814 |
// Reset the mark bitmap, summary data, and do other bookkeeping. Must be |
|
1815 |
// done before resizing. |
|
1816 |
post_compact(); |
|
1817 |
||
1818 |
// Let the size policy know we're done |
|
1819 |
size_policy->major_collection_end(old_gen->used_in_bytes(), gc_cause); |
|
1820 |
||
1821 |
if (UseAdaptiveSizePolicy) { |
|
35061 | 1822 |
log_debug(gc, ergo)("AdaptiveSizeStart: collection: %d ", heap->total_collections()); |
1823 |
log_trace(gc, ergo)("old_gen_capacity: " SIZE_FORMAT " young_gen_capacity: " SIZE_FORMAT, |
|
1824 |
old_gen->capacity_in_bytes(), young_gen->capacity_in_bytes()); |
|
1 | 1825 |
|
1826 |
// Don't check if the size_policy is ready here. Let |
|
1827 |
// the size_policy check that internally. |
|
1828 |
if (UseAdaptiveGenerationSizePolicyAtMajorCollection && |
|
31634
0aa645cd8cc3
7012980: PSOldGen is increased if there is no space in Metaspace
jmasa
parents:
31330
diff
changeset
|
1829 |
AdaptiveSizePolicy::should_update_promo_stats(gc_cause)) { |
23226
3a3de05bb757
7098155: Resize young gen at full collections for UseParallelGC
jmasa
parents:
22551
diff
changeset
|
1830 |
// 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
|
1831 |
// resize_young_gen() called below is normally used after |
3a3de05bb757
7098155: Resize young gen at full collections for UseParallelGC
jmasa
parents:
22551
diff
changeset
|
1832 |
// a successful young GC and swapping of survivor spaces; |
3a3de05bb757
7098155: Resize young gen at full collections for UseParallelGC
jmasa
parents:
22551
diff
changeset
|
1833 |
// 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
|
1834 |
// the current implementation. |
3a3de05bb757
7098155: Resize young gen at full collections for UseParallelGC
jmasa
parents:
22551
diff
changeset
|
1835 |
if (young_gen->from_space()->is_empty()) { |
3a3de05bb757
7098155: Resize young gen at full collections for UseParallelGC
jmasa
parents:
22551
diff
changeset
|
1836 |
young_gen->from_space()->clear(SpaceDecorator::Mangle); |
3a3de05bb757
7098155: Resize young gen at full collections for UseParallelGC
jmasa
parents:
22551
diff
changeset
|
1837 |
young_gen->swap_spaces(); |
3a3de05bb757
7098155: Resize young gen at full collections for UseParallelGC
jmasa
parents:
22551
diff
changeset
|
1838 |
} |
3a3de05bb757
7098155: Resize young gen at full collections for UseParallelGC
jmasa
parents:
22551
diff
changeset
|
1839 |
|
1 | 1840 |
// Calculate optimal free space amounts |
1841 |
assert(young_gen->max_size() > |
|
1842 |
young_gen->from_space()->capacity_in_bytes() + |
|
1843 |
young_gen->to_space()->capacity_in_bytes(), |
|
1844 |
"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
|
1845 |
|
7e99f263902c
8007763: Refactoring: split up compute_generation_free_space() into two functions for class PSAdaptiveSizePolicy
tamao
parents:
17390
diff
changeset
|
1846 |
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
|
1847 |
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
|
1848 |
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
|
1849 |
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
|
1850 |
size_t max_old_gen_size = old_gen->max_gen_size(); |
1 | 1851 |
size_t max_eden_size = young_gen->max_size() - |
1852 |
young_gen->from_space()->capacity_in_bytes() - |
|
1853 |
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
|
1854 |
|
7e99f263902c
8007763: Refactoring: split up compute_generation_free_space() into two functions for class PSAdaptiveSizePolicy
tamao
parents:
17390
diff
changeset
|
1855 |
// Used for diagnostics |
7e99f263902c
8007763: Refactoring: split up compute_generation_free_space() into two functions for class PSAdaptiveSizePolicy
tamao
parents:
17390
diff
changeset
|
1856 |
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
|
1857 |
|
17842
0d11fa49f81f
8007762: Rename a bunch of methods in size policy across collectors
tamao
parents:
17627
diff
changeset
|
1858 |
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
|
1859 |
eden_live, |
0d11fa49f81f
8007762: Rename a bunch of methods in size policy across collectors
tamao
parents:
17627
diff
changeset
|
1860 |
old_live, |
0d11fa49f81f
8007762: Rename a bunch of methods in size policy across collectors
tamao
parents:
17627
diff
changeset
|
1861 |
cur_eden, |
0d11fa49f81f
8007762: Rename a bunch of methods in size policy across collectors
tamao
parents:
17627
diff
changeset
|
1862 |
max_old_gen_size, |
0d11fa49f81f
8007762: Rename a bunch of methods in size policy across collectors
tamao
parents:
17627
diff
changeset
|
1863 |
max_eden_size, |
0d11fa49f81f
8007762: Rename a bunch of methods in size policy across collectors
tamao
parents:
17627
diff
changeset
|
1864 |
true /* full gc*/); |
17393
7e99f263902c
8007763: Refactoring: split up compute_generation_free_space() into two functions for class PSAdaptiveSizePolicy
tamao
parents:
17390
diff
changeset
|
1865 |
|
7e99f263902c
8007763: Refactoring: split up compute_generation_free_space() into two functions for class PSAdaptiveSizePolicy
tamao
parents:
17390
diff
changeset
|
1866 |
size_policy->check_gc_overhead_limit(young_live, |
7e99f263902c
8007763: Refactoring: split up compute_generation_free_space() into two functions for class PSAdaptiveSizePolicy
tamao
parents:
17390
diff
changeset
|
1867 |
eden_live, |
7e99f263902c
8007763: Refactoring: split up compute_generation_free_space() into two functions for class PSAdaptiveSizePolicy
tamao
parents:
17390
diff
changeset
|
1868 |
max_old_gen_size, |
7e99f263902c
8007763: Refactoring: split up compute_generation_free_space() into two functions for class PSAdaptiveSizePolicy
tamao
parents:
17390
diff
changeset
|
1869 |
max_eden_size, |
7e99f263902c
8007763: Refactoring: split up compute_generation_free_space() into two functions for class PSAdaptiveSizePolicy
tamao
parents:
17390
diff
changeset
|
1870 |
true /* full gc*/, |
7e99f263902c
8007763: Refactoring: split up compute_generation_free_space() into two functions for class PSAdaptiveSizePolicy
tamao
parents:
17390
diff
changeset
|
1871 |
gc_cause, |
49047
8f004146e407
8198515: Extract SoftReferencePolicy code out of CollectorPolicy
stefank
parents:
49041
diff
changeset
|
1872 |
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
|
1873 |
|
7e99f263902c
8007763: Refactoring: split up compute_generation_free_space() into two functions for class PSAdaptiveSizePolicy
tamao
parents:
17390
diff
changeset
|
1874 |
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
|
1875 |
|
f0b20be4165d
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
756
diff
changeset
|
1876 |
heap->resize_old_gen( |
f0b20be4165d
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
756
diff
changeset
|
1877 |
size_policy->calculated_old_free_size_in_bytes()); |
1 | 1878 |
|
23226
3a3de05bb757
7098155: Resize young gen at full collections for UseParallelGC
jmasa
parents:
22551
diff
changeset
|
1879 |
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
|
1880 |
size_policy->calculated_survivor_size_in_bytes()); |
1 | 1881 |
} |
35061 | 1882 |
|
1883 |
log_debug(gc, ergo)("AdaptiveSizeStop: collection: %d ", heap->total_collections()); |
|
1 | 1884 |
} |
1885 |
||
1886 |
if (UsePerfData) { |
|
1887 |
PSGCAdaptivePolicyCounters* const counters = heap->gc_policy_counters(); |
|
1888 |
counters->update_counters(); |
|
1889 |
counters->update_old_capacity(old_gen->capacity_in_bytes()); |
|
1890 |
counters->update_young_capacity(young_gen->capacity_in_bytes()); |
|
1891 |
} |
|
1892 |
||
1893 |
heap->resize_all_tlabs(); |
|
1894 |
||
22551 | 1895 |
// Resize the metaspace capacity after a collection |
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13195
diff
changeset
|
1896 |
MetaspaceGC::compute_new_size(); |
1 | 1897 |
|
47546
64ba55ba8516
8184286: print_tracing_info() does not use Unified Logging for output
sjohanss
parents:
47216
diff
changeset
|
1898 |
if (log_is_enabled(Debug, gc, heap, exit)) { |
35061 | 1899 |
accumulated_time()->stop(); |
1 | 1900 |
} |
1901 |
||
35061 | 1902 |
young_gen->print_used_change(pre_gc_values.young_gen_used()); |
1903 |
old_gen->print_used_change(pre_gc_values.old_gen_used()); |
|
1904 |
MetaspaceAux::print_metaspace_change(pre_gc_values.metadata_used()); |
|
1905 |
||
1 | 1906 |
// Track memory usage and detect low memory |
1907 |
MemoryService::track_memory_usage(); |
|
1908 |
heap->update_counters(); |
|
11174
fccee5238e70
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
10670
diff
changeset
|
1909 |
gc_task_manager()->release_idle_workers(); |
35939
05df7e64ecfc
8149035: Make the full_gc_dump() calls be recorded as part of the GC
brutisso
parents:
35901
diff
changeset
|
1910 |
|
05df7e64ecfc
8149035: Make the full_gc_dump() calls be recorded as part of the GC
brutisso
parents:
35901
diff
changeset
|
1911 |
heap->post_full_gc_dump(&_gc_timer); |
1 | 1912 |
} |
1913 |
||
6762
f8d1b560700e
6423256: GC stacks should use a better data structure
jcoomes
parents:
6759
diff
changeset
|
1914 |
#ifdef ASSERT |
f8d1b560700e
6423256: GC stacks should use a better data structure
jcoomes
parents:
6759
diff
changeset
|
1915 |
for (size_t i = 0; i < ParallelGCThreads + 1; ++i) { |
f8d1b560700e
6423256: GC stacks should use a better data structure
jcoomes
parents:
6759
diff
changeset
|
1916 |
ParCompactionManager* const cm = |
f8d1b560700e
6423256: GC stacks should use a better data structure
jcoomes
parents:
6759
diff
changeset
|
1917 |
ParCompactionManager::manager_array(int(i)); |
f8d1b560700e
6423256: GC stacks should use a better data structure
jcoomes
parents:
6759
diff
changeset
|
1918 |
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
|
1919 |
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
|
1920 |
} |
f8d1b560700e
6423256: GC stacks should use a better data structure
jcoomes
parents:
6759
diff
changeset
|
1921 |
#endif // ASSERT |
f8d1b560700e
6423256: GC stacks should use a better data structure
jcoomes
parents:
6759
diff
changeset
|
1922 |
|
1 | 1923 |
if (VerifyAfterGC && heap->total_collections() >= VerifyGCStartAt) { |
1924 |
HandleMark hm; // Discard invalid handles created during verification |
|
35061 | 1925 |
Universe::verify("After GC"); |
1 | 1926 |
} |
1927 |
||
1928 |
// Re-verify object start arrays |
|
1929 |
if (VerifyObjectStartArray && |
|
1930 |
VerifyAfterGC) { |
|
1931 |
old_gen->verify_object_start_array(); |
|
1932 |
} |
|
1933 |
||
971
f0b20be4165d
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
756
diff
changeset
|
1934 |
if (ZapUnusedHeapArea) { |
f0b20be4165d
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
756
diff
changeset
|
1935 |
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
|
1936 |
} |
f0b20be4165d
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
756
diff
changeset
|
1937 |
|
1 | 1938 |
NOT_PRODUCT(ref_processor()->verify_no_references_recorded()); |
1939 |
||
1940 |
collection_exit.update(); |
|
1941 |
||
11636
3c07b54482a5
7141200: log some interesting information in ring buffers for crashes
never
parents:
11251
diff
changeset
|
1942 |
heap->print_heap_after_gc(); |
18025 | 1943 |
heap->trace_heap_after_gc(&_gc_tracer); |
1944 |
||
35061 | 1945 |
log_debug(gc, task, time)("VM-Thread " JLONG_FORMAT " " JLONG_FORMAT " " JLONG_FORMAT, |
1946 |
marking_start.ticks(), compaction_start.ticks(), |
|
1947 |
collection_exit.ticks()); |
|
1948 |
gc_task_manager()->print_task_time_stamps(); |
|
2010
c13462bbad17
6690928: Use spinning in combination with yields for workstealing termination.
jmasa
parents:
1683
diff
changeset
|
1949 |
|
c13462bbad17
6690928: Use spinning in combination with yields for workstealing termination.
jmasa
parents:
1683
diff
changeset
|
1950 |
#ifdef TRACESPINNING |
c13462bbad17
6690928: Use spinning in combination with yields for workstealing termination.
jmasa
parents:
1683
diff
changeset
|
1951 |
ParallelTaskTerminator::print_termination_counts(); |
c13462bbad17
6690928: Use spinning in combination with yields for workstealing termination.
jmasa
parents:
1683
diff
changeset
|
1952 |
#endif |
11757
cdf6204b114a
7146343: PS invoke methods should indicate the type of gc done
jcoomes
parents:
11636
diff
changeset
|
1953 |
|
35061 | 1954 |
AdaptiveSizePolicyOutput::print(size_policy, heap->total_collections()); |
1955 |
||
21767
41eaa9a17059
8028128: Add a type safe alternative for working with counter based data
mgronlun
parents:
20317
diff
changeset
|
1956 |
_gc_timer.register_gc_end(); |
18025 | 1957 |
|
1958 |
_gc_tracer.report_dense_prefix(dense_prefix(old_space_id)); |
|
1959 |
_gc_tracer.report_gc_end(_gc_timer.gc_end(), _gc_timer.time_partitions()); |
|
1960 |
||
11757
cdf6204b114a
7146343: PS invoke methods should indicate the type of gc done
jcoomes
parents:
11636
diff
changeset
|
1961 |
return true; |
1 | 1962 |
} |
1963 |
||
1964 |
bool PSParallelCompact::absorb_live_data_from_eden(PSAdaptiveSizePolicy* size_policy, |
|
1965 |
PSYoungGen* young_gen, |
|
1966 |
PSOldGen* old_gen) { |
|
1967 |
MutableSpace* const eden_space = young_gen->eden_space(); |
|
1968 |
assert(!eden_space->is_empty(), "eden must be non-empty"); |
|
1969 |
assert(young_gen->virtual_space()->alignment() == |
|
1970 |
old_gen->virtual_space()->alignment(), "alignments do not match"); |
|
1971 |
||
1972 |
if (!(UseAdaptiveSizePolicy && UseAdaptiveGCBoundary)) { |
|
1973 |
return false; |
|
1974 |
} |
|
1975 |
||
1976 |
// Both generations must be completely committed. |
|
1977 |
if (young_gen->virtual_space()->uncommitted_size() != 0) { |
|
1978 |
return false; |
|
1979 |
} |
|
1980 |
if (old_gen->virtual_space()->uncommitted_size() != 0) { |
|
1981 |
return false; |
|
1982 |
} |
|
1983 |
||
1984 |
// Figure out how much to take from eden. Include the average amount promoted |
|
1985 |
// in the total; otherwise the next young gen GC will simply bail out to a |
|
1986 |
// full GC. |
|
1987 |
const size_t alignment = old_gen->virtual_space()->alignment(); |
|
1988 |
const size_t eden_used = eden_space->used_in_bytes(); |
|
1989 |
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
|
1990 |
const size_t absorb_size = align_up(eden_used + promoted, alignment); |
1 | 1991 |
const size_t eden_capacity = eden_space->capacity_in_bytes(); |
1992 |
||
1993 |
if (absorb_size >= eden_capacity) { |
|
1994 |
return false; // Must leave some space in eden. |
|
1995 |
} |
|
1996 |
||
1997 |
const size_t new_young_size = young_gen->capacity_in_bytes() - absorb_size; |
|
1998 |
if (new_young_size < young_gen->min_gen_size()) { |
|
1999 |
return false; // Respect young gen minimum size. |
|
2000 |
} |
|
2001 |
||
35061 | 2002 |
log_trace(heap, ergo)(" absorbing " SIZE_FORMAT "K: " |
1 | 2003 |
"eden " SIZE_FORMAT "K->" SIZE_FORMAT "K " |
2004 |
"from " SIZE_FORMAT "K, to " SIZE_FORMAT "K " |
|
2005 |
"young_gen " SIZE_FORMAT "K->" SIZE_FORMAT "K ", |
|
2006 |
absorb_size / K, |
|
2007 |
eden_capacity / K, (eden_capacity - absorb_size) / K, |
|
2008 |
young_gen->from_space()->used_in_bytes() / K, |
|
2009 |
young_gen->to_space()->used_in_bytes() / K, |
|
2010 |
young_gen->capacity_in_bytes() / K, new_young_size / K); |
|
2011 |
||
2012 |
// Fill the unused part of the old gen. |
|
2013 |
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
|
2014 |
HeapWord* const unused_start = old_space->top(); |
8ec481b8f514
6578152: fill_region_with_object has usability and safety issues
jcoomes
parents:
1610
diff
changeset
|
2015 |
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
|
2016 |
|
8ec481b8f514
6578152: fill_region_with_object has usability and safety issues
jcoomes
parents:
1610
diff
changeset
|
2017 |
if (unused_words > 0) { |
8ec481b8f514
6578152: fill_region_with_object has usability and safety issues
jcoomes
parents:
1610
diff
changeset
|
2018 |
if (unused_words < CollectedHeap::min_fill_size()) { |
8ec481b8f514
6578152: fill_region_with_object has usability and safety issues
jcoomes
parents:
1610
diff
changeset
|
2019 |
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
|
2020 |
} |
8ec481b8f514
6578152: fill_region_with_object has usability and safety issues
jcoomes
parents:
1610
diff
changeset
|
2021 |
CollectedHeap::fill_with_objects(unused_start, unused_words); |
1 | 2022 |
} |
2023 |
||
2024 |
// Take the live data from eden and set both top and end in the old gen to |
|
2025 |
// eden top. (Need to set end because reset_after_change() mangles the region |
|
2026 |
// from end to virtual_space->high() in debug builds). |
|
2027 |
HeapWord* const new_top = eden_space->top(); |
|
2028 |
old_gen->virtual_space()->expand_into(young_gen->virtual_space(), |
|
2029 |
absorb_size); |
|
2030 |
young_gen->reset_after_change(); |
|
2031 |
old_space->set_top(new_top); |
|
2032 |
old_space->set_end(new_top); |
|
2033 |
old_gen->reset_after_change(); |
|
2034 |
||
2035 |
// Update the object start array for the filler object and the data from eden. |
|
2036 |
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
|
2037 |
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
|
2038 |
start_array->allocate_block(p); |
1 | 2039 |
} |
2040 |
||
2041 |
// Could update the promoted average here, but it is not typically updated at |
|
2042 |
// full GCs and the value to use is unclear. Something like |
|
2043 |
// |
|
2044 |
// cur_promoted_avg + absorb_size / number_of_scavenges_since_last_full_gc. |
|
2045 |
||
2046 |
size_policy->set_bytes_absorbed_from_eden(absorb_size); |
|
2047 |
return true; |
|
2048 |
} |
|
2049 |
||
2050 |
GCTaskManager* const PSParallelCompact::gc_task_manager() { |
|
2051 |
assert(ParallelScavengeHeap::gc_task_manager() != NULL, |
|
2052 |
"shouldn't return NULL"); |
|
2053 |
return ParallelScavengeHeap::gc_task_manager(); |
|
2054 |
} |
|
2055 |
||
2056 |
void PSParallelCompact::marking_phase(ParCompactionManager* cm, |
|
18025 | 2057 |
bool maximum_heap_compaction, |
2058 |
ParallelOldTracer *gc_tracer) { |
|
1 | 2059 |
// Recursively traverse all live objects and mark them |
37146 | 2060 |
GCTraceTime(Info, gc, phases) tm("Marking Phase", &_gc_timer); |
1 | 2061 |
|
30173
13cf7580b000
8077413: Avoid use of Universe::heap() inside collectors
pliden
parents:
30150
diff
changeset
|
2062 |
ParallelScavengeHeap* heap = ParallelScavengeHeap::heap(); |
1 | 2063 |
uint parallel_gc_threads = heap->gc_task_manager()->workers(); |
11174
fccee5238e70
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
10670
diff
changeset
|
2064 |
uint active_gc_threads = heap->gc_task_manager()->active_workers(); |
37260
664b7520c44b
8153176: ParOldGC: Use correct TaskQueueSet for ParallelTaskTerminator in marking.
mgerdin
parents:
37248
diff
changeset
|
2065 |
TaskQueueSetSuper* qset = ParCompactionManager::stack_array(); |
11174
fccee5238e70
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
10670
diff
changeset
|
2066 |
ParallelTaskTerminator terminator(active_gc_threads, qset); |
1 | 2067 |
|
30556
750fee2bdb45
8078345: Move PSParallelCompact::mark_and_push to ParCompactionManager
stefank
parents:
30555
diff
changeset
|
2068 |
ParCompactionManager::MarkAndPushClosure mark_and_push_closure(cm); |
750fee2bdb45
8078345: Move PSParallelCompact::mark_and_push to ParCompactionManager
stefank
parents:
30555
diff
changeset
|
2069 |
ParCompactionManager::FollowStackClosure follow_stack_closure(cm); |
1 | 2070 |
|
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13195
diff
changeset
|
2071 |
// Need new claim bits before marking starts. |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13195
diff
changeset
|
2072 |
ClassLoaderDataGraph::clear_claimed_marks(); |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13195
diff
changeset
|
2073 |
|
1 | 2074 |
{ |
37146 | 2075 |
GCTraceTime(Debug, gc, phases) tm("Par Mark", &_gc_timer); |
18025 | 2076 |
|
3908
24b55ad4c228
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
2363
diff
changeset
|
2077 |
ParallelScavengeHeap::ParStrongRootsScope psrs; |
1 | 2078 |
|
2079 |
GCTaskQueue* q = GCTaskQueue::create(); |
|
2080 |
||
2081 |
q->enqueue(new MarkFromRootsTask(MarkFromRootsTask::universe)); |
|
2082 |
q->enqueue(new MarkFromRootsTask(MarkFromRootsTask::jni_handles)); |
|
2083 |
// We scan the thread roots in parallel |
|
2084 |
Threads::create_thread_roots_marking_tasks(q); |
|
2085 |
q->enqueue(new MarkFromRootsTask(MarkFromRootsTask::object_synchronizer)); |
|
2086 |
q->enqueue(new MarkFromRootsTask(MarkFromRootsTask::management)); |
|
2087 |
q->enqueue(new MarkFromRootsTask(MarkFromRootsTask::system_dictionary)); |
|
17844
28ca9179db98
8015268: NPG: 2.5% regression in young GC times on CRM Sales Opty
stefank
parents:
17842
diff
changeset
|
2088 |
q->enqueue(new MarkFromRootsTask(MarkFromRootsTask::class_loader_data)); |
1 | 2089 |
q->enqueue(new MarkFromRootsTask(MarkFromRootsTask::jvmti)); |
3908
24b55ad4c228
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
2363
diff
changeset
|
2090 |
q->enqueue(new MarkFromRootsTask(MarkFromRootsTask::code_cache)); |
1 | 2091 |
|
11174
fccee5238e70
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
10670
diff
changeset
|
2092 |
if (active_gc_threads > 1) { |
fccee5238e70
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
10670
diff
changeset
|
2093 |
for (uint j = 0; j < active_gc_threads; j++) { |
1 | 2094 |
q->enqueue(new StealMarkingTask(&terminator)); |
2095 |
} |
|
2096 |
} |
|
2097 |
||
11174
fccee5238e70
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
10670
diff
changeset
|
2098 |
gc_task_manager()->execute_and_wait(q); |
1 | 2099 |
} |
2100 |
||
2101 |
// Process reference objects found during marking |
|
2102 |
{ |
|
37146 | 2103 |
GCTraceTime(Debug, gc, phases) tm("Reference Processing", &_gc_timer); |
18025 | 2104 |
|
2105 |
ReferenceProcessorStats stats; |
|
46795
623a5e42deb6
8173335: Improve logging for j.l.ref.reference processing
sangheki
parents:
46701
diff
changeset
|
2106 |
ReferenceProcessorPhaseTimes pt(&_gc_timer, ref_processor()->num_q()); |
1 | 2107 |
if (ref_processor()->processing_is_mt()) { |
2108 |
RefProcTaskExecutor task_executor; |
|
18025 | 2109 |
stats = ref_processor()->process_discovered_references( |
1606
dcf9714addbe
6684579: SoftReference processing can be made more efficient
ysr
parents:
1408
diff
changeset
|
2110 |
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
|
2111 |
&task_executor, &pt); |
1 | 2112 |
} else { |
18025 | 2113 |
stats = ref_processor()->process_discovered_references( |
2114 |
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
|
2115 |
&pt); |
1 | 2116 |
} |
18025 | 2117 |
|
2118 |
gc_tracer->report_gc_reference_stats(stats); |
|
46795
623a5e42deb6
8173335: Improve logging for j.l.ref.reference processing
sangheki
parents:
46701
diff
changeset
|
2119 |
pt.print_all_references(); |
1 | 2120 |
} |
2121 |
||
47676
b1c020fc35a3
8189748: More precise closures for WeakProcessor::weak_oops_do calls
stefank
parents:
47648
diff
changeset
|
2122 |
// 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
|
2123 |
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
|
2124 |
|
47648
226b1fc611b9
8189359: Move native weak oops cleaning out of ReferenceProcessor
stefank
parents:
47634
diff
changeset
|
2125 |
{ |
226b1fc611b9
8189359: Move native weak oops cleaning out of ReferenceProcessor
stefank
parents:
47634
diff
changeset
|
2126 |
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
|
2127 |
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
|
2128 |
} |
226b1fc611b9
8189359: Move native weak oops cleaning out of ReferenceProcessor
stefank
parents:
47634
diff
changeset
|
2129 |
|
37140
b62549ead2cf
8027423: Parallel compact GC class unloading measurement includes symbol and string table time
stefank
parents:
37106
diff
changeset
|
2130 |
{ |
37146 | 2131 |
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
|
2132 |
|
b62549ead2cf
8027423: Parallel compact GC class unloading measurement includes symbol and string table time
stefank
parents:
37106
diff
changeset
|
2133 |
// Follow system dictionary roots and unload classes. |
46505
fd4bc78630b1
8174749: Use hash table/oops for MemberName table
coleenp
parents:
46502
diff
changeset
|
2134 |
bool purged_class = SystemDictionary::do_unloading(is_alive_closure(), &_gc_timer); |
37140
b62549ead2cf
8027423: Parallel compact GC class unloading measurement includes symbol and string table time
stefank
parents:
37106
diff
changeset
|
2135 |
|
b62549ead2cf
8027423: Parallel compact GC class unloading measurement includes symbol and string table time
stefank
parents:
37106
diff
changeset
|
2136 |
// Unload nmethods. |
b62549ead2cf
8027423: Parallel compact GC class unloading measurement includes symbol and string table time
stefank
parents:
37106
diff
changeset
|
2137 |
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
|
2138 |
|
b62549ead2cf
8027423: Parallel compact GC class unloading measurement includes symbol and string table time
stefank
parents:
37106
diff
changeset
|
2139 |
// Prune dead klasses from subklass/sibling/implementor lists. |
b62549ead2cf
8027423: Parallel compact GC class unloading measurement includes symbol and string table time
stefank
parents:
37106
diff
changeset
|
2140 |
Klass::clean_weak_klass_links(is_alive_closure()); |
b62549ead2cf
8027423: Parallel compact GC class unloading measurement includes symbol and string table time
stefank
parents:
37106
diff
changeset
|
2141 |
} |
b62549ead2cf
8027423: Parallel compact GC class unloading measurement includes symbol and string table time
stefank
parents:
37106
diff
changeset
|
2142 |
|
b62549ead2cf
8027423: Parallel compact GC class unloading measurement includes symbol and string table time
stefank
parents:
37106
diff
changeset
|
2143 |
{ |
37146 | 2144 |
GCTraceTime(Debug, gc, phases) t("Scrub String Table", &_gc_timer); |
37140
b62549ead2cf
8027423: Parallel compact GC class unloading measurement includes symbol and string table time
stefank
parents:
37106
diff
changeset
|
2145 |
// Delete entries for dead interned strings. |
b62549ead2cf
8027423: Parallel compact GC class unloading measurement includes symbol and string table time
stefank
parents:
37106
diff
changeset
|
2146 |
StringTable::unlink(is_alive_closure()); |
b62549ead2cf
8027423: Parallel compact GC class unloading measurement includes symbol and string table time
stefank
parents:
37106
diff
changeset
|
2147 |
} |
b62549ead2cf
8027423: Parallel compact GC class unloading measurement includes symbol and string table time
stefank
parents:
37106
diff
changeset
|
2148 |
|
b62549ead2cf
8027423: Parallel compact GC class unloading measurement includes symbol and string table time
stefank
parents:
37106
diff
changeset
|
2149 |
{ |
37146 | 2150 |
GCTraceTime(Debug, gc, phases) t("Scrub Symbol Table", &_gc_timer); |
37140
b62549ead2cf
8027423: Parallel compact GC class unloading measurement includes symbol and string table time
stefank
parents:
37106
diff
changeset
|
2151 |
// Clean up unreferenced symbols in symbol table. |
b62549ead2cf
8027423: Parallel compact GC class unloading measurement includes symbol and string table time
stefank
parents:
37106
diff
changeset
|
2152 |
SymbolTable::unlink(); |
b62549ead2cf
8027423: Parallel compact GC class unloading measurement includes symbol and string table time
stefank
parents:
37106
diff
changeset
|
2153 |
} |
b62549ead2cf
8027423: Parallel compact GC class unloading measurement includes symbol and string table time
stefank
parents:
37106
diff
changeset
|
2154 |
|
18025 | 2155 |
_gc_tracer.report_object_count_after_gc(is_alive_closure()); |
1 | 2156 |
} |
2157 |
||
35877
a2a62511d0f8
8146987: Improve Parallel GC Full GC by caching results of live_words_in_range()
tschatzl
parents:
35862
diff
changeset
|
2158 |
void PSParallelCompact::adjust_roots(ParCompactionManager* cm) { |
1 | 2159 |
// Adjust the pointers to reflect the new locations |
37146 | 2160 |
GCTraceTime(Info, gc, phases) tm("Adjust Roots", &_gc_timer); |
1 | 2161 |
|
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13195
diff
changeset
|
2162 |
// 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
|
2163 |
ClassLoaderDataGraph::clear_claimed_marks(); |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13195
diff
changeset
|
2164 |
|
35877
a2a62511d0f8
8146987: Improve Parallel GC Full GC by caching results of live_words_in_range()
tschatzl
parents:
35862
diff
changeset
|
2165 |
PSParallelCompact::AdjustPointerClosure oop_closure(cm); |
a2a62511d0f8
8146987: Improve Parallel GC Full GC by caching results of live_words_in_range()
tschatzl
parents:
35862
diff
changeset
|
2166 |
|
1 | 2167 |
// General strong roots. |
35877
a2a62511d0f8
8146987: Improve Parallel GC Full GC by caching results of live_words_in_range()
tschatzl
parents:
35862
diff
changeset
|
2168 |
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
|
2169 |
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
|
2170 |
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
|
2171 |
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
|
2172 |
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
|
2173 |
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
|
2174 |
SystemDictionary::oops_do(&oop_closure); |
47580 | 2175 |
ClassLoaderDataGraph::oops_do(&oop_closure, true); |
1 | 2176 |
|
2177 |
// Now adjust pointers in remaining weak roots. (All of which should |
|
2178 |
// 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
|
2179 |
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
|
2180 |
|
a2a62511d0f8
8146987: Improve Parallel GC Full GC by caching results of live_words_in_range()
tschatzl
parents:
35862
diff
changeset
|
2181 |
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
|
2182 |
CodeCache::blobs_do(&adjust_from_blobs); |
42650 | 2183 |
AOTLoader::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
|
2184 |
StringTable::oops_do(&oop_closure); |
a2a62511d0f8
8146987: Improve Parallel GC Full GC by caching results of live_words_in_range()
tschatzl
parents:
35862
diff
changeset
|
2185 |
ref_processor()->weak_oops_do(&oop_closure); |
1 | 2186 |
// Roots were visited so references into the young gen in roots |
2187 |
// may have been scanned. Process them also. |
|
2188 |
// Should the reference processor have a span that excludes |
|
2189 |
// young gen objects? |
|
35877
a2a62511d0f8
8146987: Improve Parallel GC Full GC by caching results of live_words_in_range()
tschatzl
parents:
35862
diff
changeset
|
2190 |
PSScavenge::reference_processor()->weak_oops_do(&oop_closure); |
1 | 2191 |
} |
2192 |
||
35061 | 2193 |
// Helper class to print 8 region numbers per line and then print the total at the end. |
2194 |
class FillableRegionLogger : public StackObj { |
|
2195 |
private: |
|
37242 | 2196 |
Log(gc, compaction) log; |
35061 | 2197 |
static const int LineLength = 8; |
2198 |
size_t _regions[LineLength]; |
|
2199 |
int _next_index; |
|
2200 |
bool _enabled; |
|
2201 |
size_t _total_regions; |
|
2202 |
public: |
|
35901
f5028c67e7cb
8147918: Rename develop_log_is_enabled() to log_develop_is_enabled()
pliden
parents:
35877
diff
changeset
|
2203 |
FillableRegionLogger() : _next_index(0), _total_regions(0), _enabled(log_develop_is_enabled(Trace, gc, compaction)) { } |
35061 | 2204 |
~FillableRegionLogger() { |
2205 |
log.trace(SIZE_FORMAT " initially fillable regions", _total_regions); |
|
2206 |
} |
|
2207 |
||
2208 |
void print_line() { |
|
2209 |
if (!_enabled || _next_index == 0) { |
|
2210 |
return; |
|
2211 |
} |
|
2212 |
FormatBuffer<> line("Fillable: "); |
|
2213 |
for (int i = 0; i < _next_index; i++) { |
|
2214 |
line.append(" " SIZE_FORMAT_W(7), _regions[i]); |
|
2215 |
} |
|
2216 |
log.trace("%s", line.buffer()); |
|
2217 |
_next_index = 0; |
|
2218 |
} |
|
2219 |
||
2220 |
void handle(size_t region) { |
|
2221 |
if (!_enabled) { |
|
2222 |
return; |
|
2223 |
} |
|
2224 |
_regions[_next_index++] = region; |
|
2225 |
if (_next_index == LineLength) { |
|
2226 |
print_line(); |
|
2227 |
} |
|
2228 |
_total_regions++; |
|
2229 |
} |
|
2230 |
}; |
|
2231 |
||
38170
ff88a25a7799
8150994: UseParallelGC fails with UseDynamicNumberOfGCThreads with specjbb2005
jmasa
parents:
38149
diff
changeset
|
2232 |
void PSParallelCompact::prepare_region_draining_tasks(GCTaskQueue* q, |
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2233 |
uint parallel_gc_threads) |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2234 |
{ |
35061 | 2235 |
GCTraceTime(Trace, gc, phases) tm("Drain Task Setup", &_gc_timer); |
1 | 2236 |
|
11174
fccee5238e70
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
10670
diff
changeset
|
2237 |
// Find the threads that are active |
fccee5238e70
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
10670
diff
changeset
|
2238 |
unsigned int which = 0; |
fccee5238e70
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
10670
diff
changeset
|
2239 |
|
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2240 |
// Find all regions that are available (can be filled immediately) and |
1 | 2241 |
// 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
|
2242 |
// order (high to low) so the regions will be removed in ascending order. |
1 | 2243 |
|
2244 |
const ParallelCompactData& sd = PSParallelCompact::summary_data(); |
|
2245 |
||
11174
fccee5238e70
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
10670
diff
changeset
|
2246 |
which = 0; |
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13195
diff
changeset
|
2247 |
// 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
|
2248 |
// be used with an old_space_id == 0. |
35061 | 2249 |
FillableRegionLogger region_logger; |
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13195
diff
changeset
|
2250 |
for (unsigned int id = to_space_id; id + 1 > old_space_id; --id) { |
1 | 2251 |
SpaceInfo* const space_info = _space_info + id; |
2252 |
MutableSpace* const space = space_info->space(); |
|
2253 |
HeapWord* const new_top = space_info->new_top(); |
|
2254 |
||
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2255 |
const size_t beg_region = sd.addr_to_region_idx(space_info->dense_prefix()); |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2256 |
const size_t end_region = |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2257 |
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
|
2258 |
|
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13195
diff
changeset
|
2259 |
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
|
2260 |
if (sd.region(cur)->claim_unsafe()) { |
38170
ff88a25a7799
8150994: UseParallelGC fails with UseDynamicNumberOfGCThreads with specjbb2005
jmasa
parents:
38149
diff
changeset
|
2261 |
ParCompactionManager* cm = ParCompactionManager::manager_array(which); |
ff88a25a7799
8150994: UseParallelGC fails with UseDynamicNumberOfGCThreads with specjbb2005
jmasa
parents:
38149
diff
changeset
|
2262 |
cm->region_stack()->push(cur); |
35061 | 2263 |
region_logger.handle(cur); |
11174
fccee5238e70
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
10670
diff
changeset
|
2264 |
// Assign regions to tasks in round-robin fashion. |
38170
ff88a25a7799
8150994: UseParallelGC fails with UseDynamicNumberOfGCThreads with specjbb2005
jmasa
parents:
38149
diff
changeset
|
2265 |
if (++which == parallel_gc_threads) { |
1 | 2266 |
which = 0; |
2267 |
} |
|
2268 |
} |
|
2269 |
} |
|
35061 | 2270 |
region_logger.print_line(); |
1 | 2271 |
} |
2272 |
} |
|
2273 |
||
2274 |
#define PAR_OLD_DENSE_PREFIX_OVER_PARTITIONING 4 |
|
2275 |
||
2276 |
void PSParallelCompact::enqueue_dense_prefix_tasks(GCTaskQueue* q, |
|
2277 |
uint parallel_gc_threads) { |
|
35061 | 2278 |
GCTraceTime(Trace, gc, phases) tm("Dense Prefix Task Setup", &_gc_timer); |
1 | 2279 |
|
2280 |
ParallelCompactData& sd = PSParallelCompact::summary_data(); |
|
2281 |
||
2282 |
// Iterate over all the spaces adding tasks for updating |
|
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2283 |
// regions in the dense prefix. Assume that 1 gc thread |
1 | 2284 |
// will work on opening the gaps and the remaining gc threads |
2285 |
// will work on the dense prefix. |
|
1669
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
2286 |
unsigned int space_id; |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
2287 |
for (space_id = old_space_id; space_id < last_space_id; ++ space_id) { |
1 | 2288 |
HeapWord* const dense_prefix_end = _space_info[space_id].dense_prefix(); |
2289 |
const MutableSpace* const space = _space_info[space_id].space(); |
|
2290 |
||
2291 |
if (dense_prefix_end == space->bottom()) { |
|
2292 |
// There is no dense prefix for this space. |
|
2293 |
continue; |
|
2294 |
} |
|
2295 |
||
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2296 |
// The dense prefix is before this region. |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2297 |
size_t region_index_end_dense_prefix = |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2298 |
sd.addr_to_region_idx(dense_prefix_end); |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2299 |
RegionData* const dense_prefix_cp = |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2300 |
sd.region(region_index_end_dense_prefix); |
1 | 2301 |
assert(dense_prefix_end == space->end() || |
2302 |
dense_prefix_cp->available() || |
|
2303 |
dense_prefix_cp->claimed(), |
|
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2304 |
"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
|
2305 |
|
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2306 |
size_t region_index_start = sd.addr_to_region_idx(space->bottom()); |
1 | 2307 |
|
2308 |
// Is there dense prefix work? |
|
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2309 |
size_t total_dense_prefix_regions = |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2310 |
region_index_end_dense_prefix - region_index_start; |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2311 |
// How many regions of the dense prefix should be given to |
1 | 2312 |
// each thread? |
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2313 |
if (total_dense_prefix_regions > 0) { |
1 | 2314 |
uint tasks_for_dense_prefix = 1; |
9178
1a022d4f1bc3
6841742: par compact - remove unused/unsupported options
jcoomes
parents:
8688
diff
changeset
|
2315 |
if (total_dense_prefix_regions <= |
1a022d4f1bc3
6841742: par compact - remove unused/unsupported options
jcoomes
parents:
8688
diff
changeset
|
2316 |
(parallel_gc_threads * PAR_OLD_DENSE_PREFIX_OVER_PARTITIONING)) { |
1a022d4f1bc3
6841742: par compact - remove unused/unsupported options
jcoomes
parents:
8688
diff
changeset
|
2317 |
// Don't over partition. This assumes that |
1a022d4f1bc3
6841742: par compact - remove unused/unsupported options
jcoomes
parents:
8688
diff
changeset
|
2318 |
// PAR_OLD_DENSE_PREFIX_OVER_PARTITIONING is a small integer value |
1a022d4f1bc3
6841742: par compact - remove unused/unsupported options
jcoomes
parents:
8688
diff
changeset
|
2319 |
// so there are not many regions to process. |
1a022d4f1bc3
6841742: par compact - remove unused/unsupported options
jcoomes
parents:
8688
diff
changeset
|
2320 |
tasks_for_dense_prefix = parallel_gc_threads; |
1a022d4f1bc3
6841742: par compact - remove unused/unsupported options
jcoomes
parents:
8688
diff
changeset
|
2321 |
} else { |
1a022d4f1bc3
6841742: par compact - remove unused/unsupported options
jcoomes
parents:
8688
diff
changeset
|
2322 |
// Over partition |
1a022d4f1bc3
6841742: par compact - remove unused/unsupported options
jcoomes
parents:
8688
diff
changeset
|
2323 |
tasks_for_dense_prefix = parallel_gc_threads * |
1a022d4f1bc3
6841742: par compact - remove unused/unsupported options
jcoomes
parents:
8688
diff
changeset
|
2324 |
PAR_OLD_DENSE_PREFIX_OVER_PARTITIONING; |
1 | 2325 |
} |
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2326 |
size_t regions_per_thread = total_dense_prefix_regions / |
1 | 2327 |
tasks_for_dense_prefix; |
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2328 |
// Give each thread at least 1 region. |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2329 |
if (regions_per_thread == 0) { |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2330 |
regions_per_thread = 1; |
1 | 2331 |
} |
2332 |
||
2333 |
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
|
2334 |
if (region_index_start >= region_index_end_dense_prefix) { |
1 | 2335 |
break; |
2336 |
} |
|
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2337 |
// region_index_end is not processed |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2338 |
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
|
2339 |
region_index_end_dense_prefix); |
1669
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
2340 |
q->enqueue(new UpdateDensePrefixTask(SpaceId(space_id), |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
2341 |
region_index_start, |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
2342 |
region_index_end)); |
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2343 |
region_index_start = region_index_end; |
1 | 2344 |
} |
2345 |
} |
|
2346 |
// This gets any part of the dense prefix that did not |
|
2347 |
// fit evenly. |
|
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2348 |
if (region_index_start < region_index_end_dense_prefix) { |
1669
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
2349 |
q->enqueue(new UpdateDensePrefixTask(SpaceId(space_id), |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
2350 |
region_index_start, |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
2351 |
region_index_end_dense_prefix)); |
1 | 2352 |
} |
1669
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
2353 |
} |
1 | 2354 |
} |
2355 |
||
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2356 |
void PSParallelCompact::enqueue_region_stealing_tasks( |
1 | 2357 |
GCTaskQueue* q, |
2358 |
ParallelTaskTerminator* terminator_ptr, |
|
2359 |
uint parallel_gc_threads) { |
|
35061 | 2360 |
GCTraceTime(Trace, gc, phases) tm("Steal Task Setup", &_gc_timer); |
1 | 2361 |
|
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2362 |
// Once a thread has drained it's stack, it should try to steal regions from |
1 | 2363 |
// other threads. |
38179
d2c90d6c5bf4
8155966: Assertion failures when -XX:+UseParallelGC -XX:ParallelGCThreads=1
jmasa
parents:
38170
diff
changeset
|
2364 |
for (uint j = 0; j < parallel_gc_threads; j++) { |
38250
37d739fb07fc
8155992: Change name of StealRegionCompactionTask to something that emphasizes the compaction task.
jmasa
parents:
38203
diff
changeset
|
2365 |
q->enqueue(new CompactionWithStealingTask(terminator_ptr)); |
1 | 2366 |
} |
2367 |
} |
|
2368 |
||
17851
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
2369 |
#ifdef ASSERT |
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
2370 |
// 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
|
2371 |
// region. |
35061 | 2372 |
void PSParallelCompact::write_block_fill_histogram() |
17851
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
2373 |
{ |
35901
f5028c67e7cb
8147918: Rename develop_log_is_enabled() to log_develop_is_enabled()
pliden
parents:
35877
diff
changeset
|
2374 |
if (!log_develop_is_enabled(Trace, gc, compaction)) { |
35061 | 2375 |
return; |
2376 |
} |
|
2377 |
||
37242 | 2378 |
Log(gc, compaction) log; |
35061 | 2379 |
ResourceMark rm; |
46701
f559541c0daa
8181917: Refactor UL LogStreams to avoid using resource area
stuefe
parents:
46625
diff
changeset
|
2380 |
LogStream ls(log.trace()); |
f559541c0daa
8181917: Refactor UL LogStreams to avoid using resource area
stuefe
parents:
46625
diff
changeset
|
2381 |
outputStream* out = &ls; |
17851
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
2382 |
|
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
2383 |
typedef ParallelCompactData::RegionData rd_t; |
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
2384 |
ParallelCompactData& sd = summary_data(); |
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
2385 |
|
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
2386 |
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
|
2387 |
MutableSpace* const spc = _space_info[id].space(); |
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
2388 |
if (spc->bottom() != spc->top()) { |
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
2389 |
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
|
2390 |
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
|
2391 |
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
|
2392 |
|
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
2393 |
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
|
2394 |
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
|
2395 |
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
|
2396 |
|
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
2397 |
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
|
2398 |
++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
|
2399 |
} |
35061 | 2400 |
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
|
2401 |
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
|
2402 |
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
|
2403 |
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
|
2404 |
} |
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
2405 |
out->cr(); |
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
2406 |
} |
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
2407 |
} |
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
2408 |
} |
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
2409 |
#endif // #ifdef ASSERT |
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
2410 |
|
1 | 2411 |
void PSParallelCompact::compact() { |
37146 | 2412 |
GCTraceTime(Info, gc, phases) tm("Compaction Phase", &_gc_timer); |
1 | 2413 |
|
30173
13cf7580b000
8077413: Avoid use of Universe::heap() inside collectors
pliden
parents:
30150
diff
changeset
|
2414 |
ParallelScavengeHeap* heap = ParallelScavengeHeap::heap(); |
1 | 2415 |
PSOldGen* old_gen = heap->old_gen(); |
2416 |
old_gen->start_array()->reset(); |
|
2417 |
uint parallel_gc_threads = heap->gc_task_manager()->workers(); |
|
11174
fccee5238e70
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
10670
diff
changeset
|
2418 |
uint active_gc_threads = heap->gc_task_manager()->active_workers(); |
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2419 |
TaskQueueSetSuper* qset = ParCompactionManager::region_array(); |
11174
fccee5238e70
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
10670
diff
changeset
|
2420 |
ParallelTaskTerminator terminator(active_gc_threads, qset); |
1 | 2421 |
|
2422 |
GCTaskQueue* q = GCTaskQueue::create(); |
|
38170
ff88a25a7799
8150994: UseParallelGC fails with UseDynamicNumberOfGCThreads with specjbb2005
jmasa
parents:
38149
diff
changeset
|
2423 |
prepare_region_draining_tasks(q, active_gc_threads); |
11174
fccee5238e70
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
10670
diff
changeset
|
2424 |
enqueue_dense_prefix_tasks(q, active_gc_threads); |
fccee5238e70
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
10670
diff
changeset
|
2425 |
enqueue_region_stealing_tasks(q, &terminator, active_gc_threads); |
1 | 2426 |
|
2427 |
{ |
|
35061 | 2428 |
GCTraceTime(Trace, gc, phases) tm("Par Compact", &_gc_timer); |
1 | 2429 |
|
11174
fccee5238e70
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
10670
diff
changeset
|
2430 |
gc_task_manager()->execute_and_wait(q); |
1 | 2431 |
|
2432 |
#ifdef ASSERT |
|
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2433 |
// Verify that all regions have been processed before the deferred updates. |
1 | 2434 |
for (unsigned int id = old_space_id; id < last_space_id; ++id) { |
2435 |
verify_complete(SpaceId(id)); |
|
2436 |
} |
|
2437 |
#endif |
|
2438 |
} |
|
2439 |
||
2440 |
{ |
|
2441 |
// Update the deferred objects, if any. Any compaction manager can be used. |
|
35061 | 2442 |
GCTraceTime(Trace, gc, phases) tm("Deferred Updates", &_gc_timer); |
1 | 2443 |
ParCompactionManager* cm = ParCompactionManager::manager_array(0); |
2444 |
for (unsigned int id = old_space_id; id < last_space_id; ++id) { |
|
2445 |
update_deferred_objects(cm, SpaceId(id)); |
|
2446 |
} |
|
2447 |
} |
|
17851
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
2448 |
|
35061 | 2449 |
DEBUG_ONLY(write_block_fill_histogram()); |
1 | 2450 |
} |
2451 |
||
2452 |
#ifdef ASSERT |
|
2453 |
void PSParallelCompact::verify_complete(SpaceId space_id) { |
|
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2454 |
// 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
|
2455 |
// and all Regions between new_top() and top() should be available (i.e., |
1 | 2456 |
// should have been emptied). |
2457 |
ParallelCompactData& sd = summary_data(); |
|
2458 |
SpaceInfo si = _space_info[space_id]; |
|
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2459 |
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
|
2460 |
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
|
2461 |
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
|
2462 |
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
|
2463 |
const size_t old_top_region = sd.addr_to_region_idx(old_top_addr); |
1 | 2464 |
|
2465 |
bool issued_a_warning = false; |
|
2466 |
||
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2467 |
size_t cur_region; |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2468 |
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
|
2469 |
const RegionData* const c = sd.region(cur_region); |
1 | 2470 |
if (!c->completed()) { |
37073
c39d0903390b
8151605: Change warning() to log_warning(gc) in the GC code
brutisso
parents:
36581
diff
changeset
|
2471 |
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
|
2472 |
cur_region, c->destination_count()); |
1 | 2473 |
issued_a_warning = true; |
2474 |
} |
|
2475 |
} |
|
2476 |
||
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2477 |
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
|
2478 |
const RegionData* const c = sd.region(cur_region); |
1 | 2479 |
if (!c->available()) { |
37073
c39d0903390b
8151605: Change warning() to log_warning(gc) in the GC code
brutisso
parents:
36581
diff
changeset
|
2480 |
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
|
2481 |
cur_region, c->destination_count()); |
1 | 2482 |
issued_a_warning = true; |
2483 |
} |
|
2484 |
} |
|
2485 |
||
2486 |
if (issued_a_warning) { |
|
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2487 |
print_region_ranges(); |
1 | 2488 |
} |
2489 |
} |
|
2490 |
#endif // #ifdef ASSERT |
|
2491 |
||
29792
8c6fa07f0869
8075957: Reduce calls to the GC specific object visitors in oopDesc
stefank
parents:
29325
diff
changeset
|
2492 |
inline void UpdateOnlyClosure::do_addr(HeapWord* addr) { |
8c6fa07f0869
8075957: Reduce calls to the GC specific object visitors in oopDesc
stefank
parents:
29325
diff
changeset
|
2493 |
_start_array->allocate_block(addr); |
8c6fa07f0869
8075957: Reduce calls to the GC specific object visitors in oopDesc
stefank
parents:
29325
diff
changeset
|
2494 |
compaction_manager()->update_contents(oop(addr)); |
8c6fa07f0869
8075957: Reduce calls to the GC specific object visitors in oopDesc
stefank
parents:
29325
diff
changeset
|
2495 |
} |
8c6fa07f0869
8075957: Reduce calls to the GC specific object visitors in oopDesc
stefank
parents:
29325
diff
changeset
|
2496 |
|
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2497 |
// Update interior oops in the ranges of regions [beg_region, end_region). |
1 | 2498 |
void |
2499 |
PSParallelCompact::update_and_deadwood_in_dense_prefix(ParCompactionManager* cm, |
|
2500 |
SpaceId space_id, |
|
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2501 |
size_t beg_region, |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2502 |
size_t end_region) { |
1 | 2503 |
ParallelCompactData& sd = summary_data(); |
2504 |
ParMarkBitMap* const mbm = mark_bitmap(); |
|
2505 |
||
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2506 |
HeapWord* beg_addr = sd.region_to_addr(beg_region); |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2507 |
HeapWord* const end_addr = sd.region_to_addr(end_region); |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2508 |
assert(beg_region <= end_region, "bad region range"); |
1 | 2509 |
assert(end_addr <= dense_prefix(space_id), "not in the dense prefix"); |
2510 |
||
2511 |
#ifdef ASSERT |
|
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2512 |
// Claim the regions to avoid triggering an assert when they are marked as |
1 | 2513 |
// filled. |
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2514 |
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
|
2515 |
assert(sd.region(claim_region)->claim_unsafe(), "claim() failed"); |
1 | 2516 |
} |
2517 |
#endif // #ifdef ASSERT |
|
2518 |
||
2519 |
if (beg_addr != space(space_id)->bottom()) { |
|
2520 |
// 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
|
2521 |
// 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
|
2522 |
// 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
|
2523 |
// 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
|
2524 |
// 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
|
2525 |
// 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
|
2526 |
// space. |
1 | 2527 |
assert(beg_addr > space(space_id)->bottom(), "sanity"); |
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2528 |
const RegionData* const cp = sd.region(beg_region); |
1 | 2529 |
if (cp->partial_obj_size() != 0) { |
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2530 |
beg_addr = sd.partial_obj_end(beg_region); |
1 | 2531 |
} else if (dead_space_crosses_boundary(cp, mbm->addr_to_bit(beg_addr))) { |
2532 |
beg_addr = mbm->find_obj_beg(beg_addr, end_addr); |
|
2533 |
} |
|
2534 |
} |
|
2535 |
||
2536 |
if (beg_addr < end_addr) { |
|
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2537 |
// A live object or block of dead space starts in this range of Regions. |
1 | 2538 |
HeapWord* const dense_prefix_end = dense_prefix(space_id); |
2539 |
||
2540 |
// Create closures and iterate. |
|
2541 |
UpdateOnlyClosure update_closure(mbm, cm, space_id); |
|
2542 |
FillClosure fill_closure(cm, space_id); |
|
2543 |
ParMarkBitMap::IterationStatus status; |
|
2544 |
status = mbm->iterate(&update_closure, &fill_closure, beg_addr, end_addr, |
|
2545 |
dense_prefix_end); |
|
2546 |
if (status == ParMarkBitMap::incomplete) { |
|
2547 |
update_closure.do_addr(update_closure.source()); |
|
2548 |
} |
|
2549 |
} |
|
2550 |
||
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2551 |
// Mark the regions as filled. |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2552 |
RegionData* const beg_cp = sd.region(beg_region); |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2553 |
RegionData* const end_cp = sd.region(end_region); |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2554 |
for (RegionData* cp = beg_cp; cp < end_cp; ++cp) { |
1 | 2555 |
cp->set_completed(); |
2556 |
} |
|
2557 |
} |
|
2558 |
||
2559 |
// Return the SpaceId for the space containing addr. If addr is not in the |
|
2560 |
// heap, last_space_id is returned. In debug mode it expects the address to be |
|
2561 |
// in the heap and asserts such. |
|
2562 |
PSParallelCompact::SpaceId PSParallelCompact::space_id(HeapWord* addr) { |
|
30173
13cf7580b000
8077413: Avoid use of Universe::heap() inside collectors
pliden
parents:
30150
diff
changeset
|
2563 |
assert(ParallelScavengeHeap::heap()->is_in_reserved(addr), "addr not in the heap"); |
1 | 2564 |
|
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13195
diff
changeset
|
2565 |
for (unsigned int id = old_space_id; id < last_space_id; ++id) { |
1 | 2566 |
if (_space_info[id].space()->contains(addr)) { |
2567 |
return SpaceId(id); |
|
2568 |
} |
|
2569 |
} |
|
2570 |
||
2571 |
assert(false, "no space contains the addr"); |
|
2572 |
return last_space_id; |
|
2573 |
} |
|
2574 |
||
2575 |
void PSParallelCompact::update_deferred_objects(ParCompactionManager* cm, |
|
2576 |
SpaceId id) { |
|
2577 |
assert(id < last_space_id, "bad space id"); |
|
2578 |
||
2579 |
ParallelCompactData& sd = summary_data(); |
|
2580 |
const SpaceInfo* const space_info = _space_info + id; |
|
2581 |
ObjectStartArray* const start_array = space_info->start_array(); |
|
2582 |
||
2583 |
const MutableSpace* const space = space_info->space(); |
|
2584 |
assert(space_info->dense_prefix() >= space->bottom(), "dense_prefix not set"); |
|
2585 |
HeapWord* const beg_addr = space_info->dense_prefix(); |
|
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2586 |
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
|
2587 |
|
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2588 |
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
|
2589 |
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
|
2590 |
const RegionData* cur_region; |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2591 |
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
|
2592 |
HeapWord* const addr = cur_region->deferred_obj_addr(); |
1 | 2593 |
if (addr != NULL) { |
2594 |
if (start_array != NULL) { |
|
2595 |
start_array->allocate_block(addr); |
|
2596 |
} |
|
29792
8c6fa07f0869
8075957: Reduce calls to the GC specific object visitors in oopDesc
stefank
parents:
29325
diff
changeset
|
2597 |
cm->update_contents(oop(addr)); |
46968
9119841280f4
8160399: is_oop_or_null involves undefined behavior
coleenp
parents:
46795
diff
changeset
|
2598 |
assert(oopDesc::is_oop_or_null(oop(addr)), "Expected an oop or NULL at " PTR_FORMAT, p2i(oop(addr))); |
1 | 2599 |
} |
2600 |
} |
|
2601 |
} |
|
2602 |
||
2603 |
// Skip over count live words starting from beg, and return the address of the |
|
2604 |
// next live word. Unless marked, the word corresponding to beg is assumed to |
|
2605 |
// be dead. Callers must either ensure beg does not correspond to the middle of |
|
2606 |
// an object, or account for those live words in some other way. Callers must |
|
2607 |
// also ensure that there are enough live words in the range [beg, end) to skip. |
|
2608 |
HeapWord* |
|
2609 |
PSParallelCompact::skip_live_words(HeapWord* beg, HeapWord* end, size_t count) |
|
2610 |
{ |
|
2611 |
assert(count > 0, "sanity"); |
|
2612 |
||
2613 |
ParMarkBitMap* m = mark_bitmap(); |
|
2614 |
idx_t bits_to_skip = m->words_to_bits(count); |
|
2615 |
idx_t cur_beg = m->addr_to_bit(beg); |
|
2616 |
const idx_t search_end = BitMap::word_align_up(m->addr_to_bit(end)); |
|
2617 |
||
2618 |
do { |
|
2619 |
cur_beg = m->find_obj_beg(cur_beg, search_end); |
|
2620 |
idx_t cur_end = m->find_obj_end(cur_beg, search_end); |
|
2621 |
const size_t obj_bits = cur_end - cur_beg + 1; |
|
2622 |
if (obj_bits > bits_to_skip) { |
|
2623 |
return m->bit_to_addr(cur_beg + bits_to_skip); |
|
2624 |
} |
|
2625 |
bits_to_skip -= obj_bits; |
|
2626 |
cur_beg = cur_end + 1; |
|
2627 |
} while (bits_to_skip > 0); |
|
2628 |
||
2629 |
// Skipping the desired number of words landed just past the end of an object. |
|
2630 |
// Find the start of the next object. |
|
2631 |
cur_beg = m->find_obj_beg(cur_beg, search_end); |
|
2632 |
assert(cur_beg < m->addr_to_bit(end), "not enough live words to skip"); |
|
2633 |
return m->bit_to_addr(cur_beg); |
|
2634 |
} |
|
2635 |
||
1669
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
2636 |
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
|
2637 |
SpaceId src_space_id, |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
2638 |
size_t src_region_idx) |
1 | 2639 |
{ |
1669
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
2640 |
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
|
2641 |
|
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
2642 |
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
|
2643 |
if (split_info.dest_region_addr() == dest_addr) { |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
2644 |
// 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
|
2645 |
// be copied to dest_addr. |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
2646 |
return split_info.first_src_addr(); |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
2647 |
} |
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
2648 |
|
c921639400dd
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
1668
diff
changeset
|
2649 |
const ParallelCompactData& sd = summary_data(); |
1 | 2650 |
ParMarkBitMap* const bitmap = mark_bitmap(); |
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2651 |
const size_t RegionSize = ParallelCompactData::RegionSize; |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2652 |
|
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2653 |
assert(sd.is_region_aligned(dest_addr), "not aligned"); |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2654 |
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
|
2655 |
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
|
2656 |
HeapWord* const src_region_destination = src_region_ptr->destination(); |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2657 |
|
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2658 |
assert(dest_addr >= src_region_destination, "wrong src region"); |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2659 |
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
|
2660 |
|
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2661 |
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
|
2662 |
HeapWord* const src_region_end = src_region_beg + RegionSize; |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2663 |
|
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2664 |
HeapWord* addr = src_region_beg; |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2665 |
if (dest_addr == src_region_destination) { |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2666 |
// Return the first live word in the source region. |
1 | 2667 |
if (partial_obj_size == 0) { |
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2668 |
addr = bitmap->find_obj_beg(addr, src_region_end); |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2669 |
assert(addr < src_region_end, "no objects start in src region"); |
1 | 2670 |
} |
2671 |
return addr; |
|
2672 |
} |
|
2673 |
||
2674 |
// Must skip some live data. |
|
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2675 |
size_t words_to_skip = dest_addr - src_region_destination; |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2676 |
assert(src_region_ptr->data_size() > words_to_skip, "wrong src region"); |
1 | 2677 |
|
2678 |
if (partial_obj_size >= words_to_skip) { |
|
2679 |
// All the live words to skip are part of the partial object. |
|
2680 |
addr += words_to_skip; |
|
2681 |
if (partial_obj_size == words_to_skip) { |
|
2682 |
// Find the first live word past the partial object. |
|
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2683 |
addr = bitmap->find_obj_beg(addr, src_region_end); |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2684 |
assert(addr < src_region_end, "wrong src region"); |
1 | 2685 |
} |
2686 |
return addr; |
|
2687 |
} |
|
2688 |
||
2689 |
// Skip over the partial object (if any). |
|
2690 |
if (partial_obj_size != 0) { |
|
2691 |
words_to_skip -= partial_obj_size; |
|
2692 |
addr += partial_obj_size; |
|
2693 |
} |
|
2694 |
||
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2695 |
// 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
|
2696 |
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
|
2697 |
assert(addr < src_region_end, "wrong src region"); |
1 | 2698 |
return addr; |
2699 |
} |
|
2700 |
||
2701 |
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
|
2702 |
SpaceId src_space_id, |
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2703 |
size_t beg_region, |
1 | 2704 |
HeapWord* end_addr) |
2705 |
{ |
|
2706 |
ParallelCompactData& sd = summary_data(); |
|
1682
94ad5692b3a7
6784849: par compact - can fail when to_space is non-empty
jcoomes
parents:
1670
diff
changeset
|
2707 |
|
94ad5692b3a7
6784849: par compact - can fail when to_space is non-empty
jcoomes
parents:
1670
diff
changeset
|
2708 |
#ifdef ASSERT |
94ad5692b3a7
6784849: par compact - can fail when to_space is non-empty
jcoomes
parents:
1670
diff
changeset
|
2709 |
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
|
2710 |
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
|
2711 |
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
|
2712 |
"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
|
2713 |
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
|
2714 |
"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
|
2715 |
#endif // #ifdef ASSERT |
94ad5692b3a7
6784849: par compact - can fail when to_space is non-empty
jcoomes
parents:
1670
diff
changeset
|
2716 |
|
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2717 |
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
|
2718 |
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
|
2719 |
|
94ad5692b3a7
6784849: par compact - can fail when to_space is non-empty
jcoomes
parents:
1670
diff
changeset
|
2720 |
// 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
|
2721 |
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
|
2722 |
RegionData* const enqueue_end = |
94ad5692b3a7
6784849: par compact - can fail when to_space is non-empty
jcoomes
parents:
1670
diff
changeset
|
2723 |
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
|
2724 |
|
94ad5692b3a7
6784849: par compact - can fail when to_space is non-empty
jcoomes
parents:
1670
diff
changeset
|
2725 |
for (RegionData* cur = beg; cur < end; ++cur) { |
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2726 |
assert(cur->data_size() > 0, "region must have live data"); |
1 | 2727 |
cur->decrement_destination_count(); |
1682
94ad5692b3a7
6784849: par compact - can fail when to_space is non-empty
jcoomes
parents:
1670
diff
changeset
|
2728 |
if (cur < enqueue_end && cur->available() && cur->claim()) { |
5918 | 2729 |
cm->push_region(sd.region(cur)); |
1 | 2730 |
} |
2731 |
} |
|
2732 |
} |
|
2733 |
||
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2734 |
size_t PSParallelCompact::next_src_region(MoveAndUpdateClosure& closure, |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2735 |
SpaceId& src_space_id, |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2736 |
HeapWord*& src_space_top, |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2737 |
HeapWord* end_addr) |
1 | 2738 |
{ |
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2739 |
typedef ParallelCompactData::RegionData RegionData; |
1 | 2740 |
|
2741 |
ParallelCompactData& sd = PSParallelCompact::summary_data(); |
|
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2742 |
const size_t region_size = ParallelCompactData::RegionSize; |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2743 |
|
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2744 |
size_t src_region_idx = 0; |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2745 |
|
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2746 |
// 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
|
2747 |
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
|
2748 |
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
|
2749 |
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
|
2750 |
const RegionData* const top_region_ptr = |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2751 |
sd.addr_to_region_ptr(top_aligned_up); |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2752 |
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
|
2753 |
++src_region_ptr; |
1 | 2754 |
} |
2755 |
||
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2756 |
if (src_region_ptr < top_region_ptr) { |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2757 |
// 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
|
2758 |
// and the source address to match src_region_ptr. |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2759 |
src_region_idx = sd.region(src_region_ptr); |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2760 |
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
|
2761 |
if (src_region_addr > closure.source()) { |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2762 |
closure.set_source(src_region_addr); |
1 | 2763 |
} |
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2764 |
return src_region_idx; |
1 | 2765 |
} |
2766 |
||
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2767 |
// Switch to a new source space and find the first non-empty region. |
1 | 2768 |
unsigned int space_id = src_space_id + 1; |
2769 |
assert(space_id < last_space_id, "not enough spaces"); |
|
2770 |
||
2771 |
HeapWord* const destination = closure.destination(); |
|
2772 |
||
2773 |
do { |
|
2774 |
MutableSpace* space = _space_info[space_id].space(); |
|
2775 |
HeapWord* const bottom = space->bottom(); |
|
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2776 |
const RegionData* const bottom_cp = sd.addr_to_region_ptr(bottom); |
1 | 2777 |
|
2778 |
// Iterate over the spaces that do not compact into themselves. |
|
2779 |
if (bottom_cp->destination() != bottom) { |
|
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2780 |
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
|
2781 |
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
|
2782 |
|
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2783 |
for (const RegionData* src_cp = bottom_cp; src_cp < top_cp; ++src_cp) { |
1 | 2784 |
if (src_cp->live_obj_size() > 0) { |
2785 |
// Found it. |
|
2786 |
assert(src_cp->destination() == destination, |
|
2787 |
"first live obj in the space must match the destination"); |
|
2788 |
assert(src_cp->partial_obj_size() == 0, |
|
2789 |
"a space cannot begin with a partial obj"); |
|
2790 |
||
2791 |
src_space_id = SpaceId(space_id); |
|
2792 |
src_space_top = space->top(); |
|
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2793 |
const size_t src_region_idx = sd.region(src_cp); |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2794 |
closure.set_source(sd.region_to_addr(src_region_idx)); |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2795 |
return src_region_idx; |
1 | 2796 |
} else { |
2797 |
assert(src_cp->data_size() == 0, "sanity"); |
|
2798 |
} |
|
2799 |
} |
|
2800 |
} |
|
2801 |
} while (++space_id < last_space_id); |
|
2802 |
||
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2803 |
assert(false, "no source region was found"); |
1 | 2804 |
return 0; |
2805 |
} |
|
2806 |
||
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2807 |
void PSParallelCompact::fill_region(ParCompactionManager* cm, size_t region_idx) |
1 | 2808 |
{ |
2809 |
typedef ParMarkBitMap::IterationStatus IterationStatus; |
|
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2810 |
const size_t RegionSize = ParallelCompactData::RegionSize; |
1 | 2811 |
ParMarkBitMap* const bitmap = mark_bitmap(); |
2812 |
ParallelCompactData& sd = summary_data(); |
|
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2813 |
RegionData* const region_ptr = sd.region(region_idx); |
1 | 2814 |
|
2815 |
// Get the items needed to construct the closure. |
|
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2816 |
HeapWord* dest_addr = sd.region_to_addr(region_idx); |
1 | 2817 |
SpaceId dest_space_id = space_id(dest_addr); |
2818 |
ObjectStartArray* start_array = _space_info[dest_space_id].start_array(); |
|
2819 |
HeapWord* new_top = _space_info[dest_space_id].new_top(); |
|
2820 |
assert(dest_addr < new_top, "sanity"); |
|
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2821 |
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
|
2822 |
|
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2823 |
// Get the source region and related info. |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2824 |
size_t src_region_idx = region_ptr->source_region(); |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2825 |
SpaceId src_space_id = space_id(sd.region_to_addr(src_region_idx)); |
1 | 2826 |
HeapWord* src_space_top = _space_info[src_space_id].space()->top(); |
2827 |
||
2828 |
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
|
2829 |
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
|
2830 |
|
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2831 |
// 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
|
2832 |
// 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
|
2833 |
if (src_region_idx == region_idx) { |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2834 |
src_region_idx += 1; |
1 | 2835 |
} |
2836 |
||
2837 |
if (bitmap->is_unmarked(closure.source())) { |
|
2838 |
// The first source word is in the middle of an object; copy the remainder |
|
2839 |
// of the object or as much as will fit. The fact that pointer updates were |
|
2840 |
// deferred will be noted when the object header is processed. |
|
2841 |
HeapWord* const old_src_addr = closure.source(); |
|
2842 |
closure.copy_partial_obj(); |
|
2843 |
if (closure.is_full()) { |
|
1682
94ad5692b3a7
6784849: par compact - can fail when to_space is non-empty
jcoomes
parents:
1670
diff
changeset
|
2844 |
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
|
2845 |
closure.source()); |
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2846 |
region_ptr->set_deferred_obj_addr(NULL); |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2847 |
region_ptr->set_completed(); |
1 | 2848 |
return; |
2849 |
} |
|
2850 |
||
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2851 |
HeapWord* const end_addr = sd.region_align_down(closure.source()); |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2852 |
if (sd.region_align_down(old_src_addr) != end_addr) { |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2853 |
// 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
|
2854 |
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
|
2855 |
|
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2856 |
// Move to the next source region, possibly switching spaces as well. All |
1 | 2857 |
// args except end_addr may be modified. |
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2858 |
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
|
2859 |
end_addr); |
1 | 2860 |
} |
2861 |
} |
|
2862 |
||
2863 |
do { |
|
2864 |
HeapWord* const cur_addr = closure.source(); |
|
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2865 |
HeapWord* const end_addr = MIN2(sd.region_align_up(cur_addr + 1), |
1 | 2866 |
src_space_top); |
2867 |
IterationStatus status = bitmap->iterate(&closure, cur_addr, end_addr); |
|
2868 |
||
2869 |
if (status == ParMarkBitMap::incomplete) { |
|
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2870 |
// 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
|
2871 |
// region. |
5402
c51fd0c1d005
6888953: some calls to function-like macros are missing semicolons
jcoomes
parents:
5343
diff
changeset
|
2872 |
assert(closure.source() < end_addr, "sanity"); |
1 | 2873 |
HeapWord* const obj_beg = closure.source(); |
2874 |
HeapWord* const range_end = MIN2(obj_beg + closure.words_remaining(), |
|
2875 |
src_space_top); |
|
2876 |
HeapWord* const obj_end = bitmap->find_obj_end(obj_beg, range_end); |
|
2877 |
if (obj_end < range_end) { |
|
2878 |
// The end was found; the entire object will fit. |
|
2879 |
status = closure.do_addr(obj_beg, bitmap->obj_size(obj_beg, obj_end)); |
|
2880 |
assert(status != ParMarkBitMap::would_overflow, "sanity"); |
|
2881 |
} else { |
|
2882 |
// The end was not found; the object will not fit. |
|
2883 |
assert(range_end < src_space_top, "obj cannot cross space boundary"); |
|
2884 |
status = ParMarkBitMap::would_overflow; |
|
2885 |
} |
|
2886 |
} |
|
2887 |
||
2888 |
if (status == ParMarkBitMap::would_overflow) { |
|
2889 |
// 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
|
2890 |
// 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
|
2891 |
region_ptr->set_deferred_obj_addr(closure.destination()); |
1 | 2892 |
status = closure.copy_until_full(); // copies from closure.source() |
2893 |
||
1682
94ad5692b3a7
6784849: par compact - can fail when to_space is non-empty
jcoomes
parents:
1670
diff
changeset
|
2894 |
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
|
2895 |
closure.source()); |
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2896 |
region_ptr->set_completed(); |
1 | 2897 |
return; |
2898 |
} |
|
2899 |
||
2900 |
if (status == ParMarkBitMap::full) { |
|
1682
94ad5692b3a7
6784849: par compact - can fail when to_space is non-empty
jcoomes
parents:
1670
diff
changeset
|
2901 |
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
|
2902 |
closure.source()); |
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2903 |
region_ptr->set_deferred_obj_addr(NULL); |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2904 |
region_ptr->set_completed(); |
1 | 2905 |
return; |
2906 |
} |
|
2907 |
||
1682
94ad5692b3a7
6784849: par compact - can fail when to_space is non-empty
jcoomes
parents:
1670
diff
changeset
|
2908 |
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
|
2909 |
|
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2910 |
// Move to the next source region, possibly switching spaces as well. All |
1 | 2911 |
// args except end_addr may be modified. |
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2912 |
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
|
2913 |
end_addr); |
1 | 2914 |
} while (true); |
2915 |
} |
|
2916 |
||
17851
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
2917 |
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
|
2918 |
{ |
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
2919 |
// 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
|
2920 |
// 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
|
2921 |
// 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
|
2922 |
// 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
|
2923 |
// |
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
2924 |
// 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
|
2925 |
// 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
|
2926 |
// 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
|
2927 |
// 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
|
2928 |
const size_t Log2BlockSize = ParallelCompactData::Log2BlockSize; |
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
2929 |
const size_t Log2RegionSize = ParallelCompactData::Log2RegionSize; |
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
2930 |
const size_t RegionSize = ParallelCompactData::RegionSize; |
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
2931 |
|
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
2932 |
ParallelCompactData& sd = summary_data(); |
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
2933 |
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
|
2934 |
if (partial_obj_size >= RegionSize) { |
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
2935 |
return; // No objects start in this region. |
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
2936 |
} |
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
2937 |
|
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
2938 |
// 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
|
2939 |
size_t cur_block = sd.block_count(); |
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
2940 |
|
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
2941 |
const ParMarkBitMap* const bitmap = mark_bitmap(); |
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
2942 |
|
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
2943 |
const size_t Log2BitsPerBlock = Log2BlockSize - LogMinObjAlignment; |
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
2944 |
assert((size_t)1 << Log2BitsPerBlock == |
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
2945 |
bitmap->words_to_bits(ParallelCompactData::BlockSize), "sanity"); |
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
2946 |
|
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
2947 |
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
|
2948 |
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
|
2949 |
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
|
2950 |
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
|
2951 |
while (beg_bit < range_end) { |
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
2952 |
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
|
2953 |
if (new_block != cur_block) { |
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
2954 |
cur_block = new_block; |
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
2955 |
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
|
2956 |
} |
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
2957 |
|
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
2958 |
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
|
2959 |
if (end_bit < range_end - 1) { |
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
2960 |
live_bits += end_bit - beg_bit + 1; |
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
2961 |
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
|
2962 |
} else { |
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
2963 |
return; |
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
2964 |
} |
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
2965 |
} |
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
2966 |
} |
04e698940f8a
6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents:
17844
diff
changeset
|
2967 |
|
1 | 2968 |
void |
2969 |
PSParallelCompact::move_and_update(ParCompactionManager* cm, SpaceId space_id) { |
|
2970 |
const MutableSpace* sp = space(space_id); |
|
2971 |
if (sp->is_empty()) { |
|
2972 |
return; |
|
2973 |
} |
|
2974 |
||
2975 |
ParallelCompactData& sd = PSParallelCompact::summary_data(); |
|
2976 |
ParMarkBitMap* const bitmap = mark_bitmap(); |
|
2977 |
HeapWord* const dp_addr = dense_prefix(space_id); |
|
2978 |
HeapWord* beg_addr = sp->bottom(); |
|
2979 |
HeapWord* end_addr = sp->top(); |
|
2980 |
||
2981 |
assert(beg_addr <= dp_addr && dp_addr <= end_addr, "bad dense prefix"); |
|
2982 |
||
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2983 |
const size_t beg_region = sd.addr_to_region_idx(beg_addr); |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2984 |
const size_t dp_region = sd.addr_to_region_idx(dp_addr); |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2985 |
if (beg_region < dp_region) { |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2986 |
update_and_deadwood_in_dense_prefix(cm, space_id, beg_region, dp_region); |
1 | 2987 |
} |
2988 |
||
1407
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2989 |
// The destination of the first live object that starts in the region is one |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2990 |
// past the end of the partial object entering the region (if any). |
9006b01ba3fd
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
1406
diff
changeset
|
2991 |
HeapWord* const dest_addr = sd.partial_obj_end(dp_region); |
1 | 2992 |
HeapWord* const new_top = _space_info[space_id].new_top(); |
2993 |
assert(new_top >= dest_addr, "bad new_top value"); |
|
2994 |
const size_t words = pointer_delta(new_top, dest_addr); |
|
2995 |
||
2996 |
if (words > 0) { |
|
2997 |
ObjectStartArray* start_array = _space_info[space_id].start_array(); |
|
2998 |
MoveAndUpdateClosure closure(bitmap, cm, start_array, dest_addr, words); |
|
2999 |
||
3000 |
ParMarkBitMap::IterationStatus status; |
|
3001 |
status = bitmap->iterate(&closure, dest_addr, end_addr); |
|
3002 |
assert(status == ParMarkBitMap::full, "iteration not complete"); |
|
3003 |
assert(bitmap->find_obj_beg(closure.source(), end_addr) == end_addr, |
|
3004 |
"live objects skipped because closure is full"); |
|
3005 |
} |
|
3006 |
} |
|
3007 |
||
3008 |
jlong PSParallelCompact::millis_since_last_gc() { |
|
22551 | 3009 |
// 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
|
3010 |
// 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
|
3011 |
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
|
3012 |
jlong ret_val = now - _time_of_last_gc; |
1 | 3013 |
// XXX See note in genCollectedHeap::millis_since_last_gc(). |
3014 |
if (ret_val < 0) { |
|
37073
c39d0903390b
8151605: Change warning() to log_warning(gc) in the GC code
brutisso
parents:
36581
diff
changeset
|
3015 |
NOT_PRODUCT(log_warning(gc)("time warp: " JLONG_FORMAT, ret_val);) |
1 | 3016 |
return 0; |
3017 |
} |
|
3018 |
return ret_val; |
|
3019 |
} |
|
3020 |
||
3021 |
void PSParallelCompact::reset_millis_since_last_gc() { |
|
22551 | 3022 |
// 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
|
3023 |
// 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
|
3024 |
_time_of_last_gc = os::javaTimeNanos() / NANOSECS_PER_MILLISEC; |
1 | 3025 |
} |
3026 |
||
3027 |
ParMarkBitMap::IterationStatus MoveAndUpdateClosure::copy_until_full() |
|
3028 |
{ |
|
3029 |
if (source() != destination()) { |
|
1682
94ad5692b3a7
6784849: par compact - can fail when to_space is non-empty
jcoomes
parents:
1670
diff
changeset
|
3030 |
DEBUG_ONLY(PSParallelCompact::check_new_location(source(), destination());) |
1 | 3031 |
Copy::aligned_conjoint_words(source(), destination(), words_remaining()); |
3032 |
} |
|
3033 |
update_state(words_remaining()); |
|
3034 |
assert(is_full(), "sanity"); |
|
3035 |
return ParMarkBitMap::full; |
|
3036 |
} |
|
3037 |
||
3038 |
void MoveAndUpdateClosure::copy_partial_obj() |
|
3039 |
{ |
|
3040 |
size_t words = words_remaining(); |
|
3041 |
||
3042 |
HeapWord* const range_end = MIN2(source() + words, bitmap()->region_end()); |
|
3043 |
HeapWord* const end_addr = bitmap()->find_obj_end(source(), range_end); |
|
3044 |
if (end_addr < range_end) { |
|
3045 |
words = bitmap()->obj_size(source(), end_addr); |
|
3046 |
} |
|
3047 |
||
3048 |
// This test is necessary; if omitted, the pointer updates to a partial object |
|
3049 |
// that crosses the dense prefix boundary could be overwritten. |
|
3050 |
if (source() != destination()) { |
|
1682
94ad5692b3a7
6784849: par compact - can fail when to_space is non-empty
jcoomes
parents:
1670
diff
changeset
|
3051 |
DEBUG_ONLY(PSParallelCompact::check_new_location(source(), destination());) |
1 | 3052 |
Copy::aligned_conjoint_words(source(), destination(), words); |
3053 |
} |
|
3054 |
update_state(words); |
|
3055 |
} |
|
3056 |
||
35877
a2a62511d0f8
8146987: Improve Parallel GC Full GC by caching results of live_words_in_range()
tschatzl
parents:
35862
diff
changeset
|
3057 |
void InstanceKlass::oop_pc_update_pointers(oop obj, ParCompactionManager* cm) { |
a2a62511d0f8
8146987: Improve Parallel GC Full GC by caching results of live_words_in_range()
tschatzl
parents:
35862
diff
changeset
|
3058 |
PSParallelCompact::AdjustPointerClosure closure(cm); |
a2a62511d0f8
8146987: Improve Parallel GC Full GC by caching results of live_words_in_range()
tschatzl
parents:
35862
diff
changeset
|
3059 |
oop_oop_iterate_oop_maps<true>(obj, &closure); |
30150
d9c940aa42ef
8075955: Replace the macro based implementation of oop_oop_iterate with a template based solution
stefank
parents:
29798
diff
changeset
|
3060 |
} |
d9c940aa42ef
8075955: Replace the macro based implementation of oop_oop_iterate with a template based solution
stefank
parents:
29798
diff
changeset
|
3061 |
|
35877
a2a62511d0f8
8146987: Improve Parallel GC Full GC by caching results of live_words_in_range()
tschatzl
parents:
35862
diff
changeset
|
3062 |
void InstanceMirrorKlass::oop_pc_update_pointers(oop obj, ParCompactionManager* cm) { |
a2a62511d0f8
8146987: Improve Parallel GC Full GC by caching results of live_words_in_range()
tschatzl
parents:
35862
diff
changeset
|
3063 |
InstanceKlass::oop_pc_update_pointers(obj, cm); |
a2a62511d0f8
8146987: Improve Parallel GC Full GC by caching results of live_words_in_range()
tschatzl
parents:
35862
diff
changeset
|
3064 |
|
a2a62511d0f8
8146987: Improve Parallel GC Full GC by caching results of live_words_in_range()
tschatzl
parents:
35862
diff
changeset
|
3065 |
PSParallelCompact::AdjustPointerClosure closure(cm); |
a2a62511d0f8
8146987: Improve Parallel GC Full GC by caching results of live_words_in_range()
tschatzl
parents:
35862
diff
changeset
|
3066 |
oop_oop_iterate_statics<true>(obj, &closure); |
30150
d9c940aa42ef
8075955: Replace the macro based implementation of oop_oop_iterate with a template based solution
stefank
parents:
29798
diff
changeset
|
3067 |
} |
d9c940aa42ef
8075955: Replace the macro based implementation of oop_oop_iterate with a template based solution
stefank
parents:
29798
diff
changeset
|
3068 |
|
35877
a2a62511d0f8
8146987: Improve Parallel GC Full GC by caching results of live_words_in_range()
tschatzl
parents:
35862
diff
changeset
|
3069 |
void InstanceClassLoaderKlass::oop_pc_update_pointers(oop obj, ParCompactionManager* cm) { |
a2a62511d0f8
8146987: Improve Parallel GC Full GC by caching results of live_words_in_range()
tschatzl
parents:
35862
diff
changeset
|
3070 |
InstanceKlass::oop_pc_update_pointers(obj, cm); |
30150
d9c940aa42ef
8075955: Replace the macro based implementation of oop_oop_iterate with a template based solution
stefank
parents:
29798
diff
changeset
|
3071 |
} |
d9c940aa42ef
8075955: Replace the macro based implementation of oop_oop_iterate with a template based solution
stefank
parents:
29798
diff
changeset
|
3072 |
|
d9c940aa42ef
8075955: Replace the macro based implementation of oop_oop_iterate with a template based solution
stefank
parents:
29798
diff
changeset
|
3073 |
#ifdef ASSERT |
d9c940aa42ef
8075955: Replace the macro based implementation of oop_oop_iterate with a template based solution
stefank
parents:
29798
diff
changeset
|
3074 |
template <class T> static void trace_reference_gc(const char *s, oop obj, |
d9c940aa42ef
8075955: Replace the macro based implementation of oop_oop_iterate with a template based solution
stefank
parents:
29798
diff
changeset
|
3075 |
T* referent_addr, |
d9c940aa42ef
8075955: Replace the macro based implementation of oop_oop_iterate with a template based solution
stefank
parents:
29798
diff
changeset
|
3076 |
T* next_addr, |
d9c940aa42ef
8075955: Replace the macro based implementation of oop_oop_iterate with a template based solution
stefank
parents:
29798
diff
changeset
|
3077 |
T* discovered_addr) { |
35061 | 3078 |
log_develop_trace(gc, ref)("%s obj " PTR_FORMAT, s, p2i(obj)); |
3079 |
log_develop_trace(gc, ref)(" referent_addr/* " PTR_FORMAT " / " PTR_FORMAT, |
|
3080 |
p2i(referent_addr), referent_addr ? p2i(oopDesc::load_decode_heap_oop(referent_addr)) : NULL); |
|
3081 |
log_develop_trace(gc, ref)(" next_addr/* " PTR_FORMAT " / " PTR_FORMAT, |
|
3082 |
p2i(next_addr), next_addr ? p2i(oopDesc::load_decode_heap_oop(next_addr)) : NULL); |
|
3083 |
log_develop_trace(gc, ref)(" discovered_addr/* " PTR_FORMAT " / " PTR_FORMAT, |
|
3084 |
p2i(discovered_addr), discovered_addr ? p2i(oopDesc::load_decode_heap_oop(discovered_addr)) : NULL); |
|
30150
d9c940aa42ef
8075955: Replace the macro based implementation of oop_oop_iterate with a template based solution
stefank
parents:
29798
diff
changeset
|
3085 |
} |
d9c940aa42ef
8075955: Replace the macro based implementation of oop_oop_iterate with a template based solution
stefank
parents:
29798
diff
changeset
|
3086 |
#endif |
d9c940aa42ef
8075955: Replace the macro based implementation of oop_oop_iterate with a template based solution
stefank
parents:
29798
diff
changeset
|
3087 |
|
d9c940aa42ef
8075955: Replace the macro based implementation of oop_oop_iterate with a template based solution
stefank
parents:
29798
diff
changeset
|
3088 |
template <class T> |
35877
a2a62511d0f8
8146987: Improve Parallel GC Full GC by caching results of live_words_in_range()
tschatzl
parents:
35862
diff
changeset
|
3089 |
static void oop_pc_update_pointers_specialized(oop obj, ParCompactionManager* cm) { |
49041
44122f767467
8198286: Direct memory accessors in typeArrayOop.hpp should use Access API
eosterlund
parents:
48168
diff
changeset
|
3090 |
T* referent_addr = (T*)java_lang_ref_Reference::referent_addr_raw(obj); |
35877
a2a62511d0f8
8146987: Improve Parallel GC Full GC by caching results of live_words_in_range()
tschatzl
parents:
35862
diff
changeset
|
3091 |
PSParallelCompact::adjust_pointer(referent_addr, cm); |
49041
44122f767467
8198286: Direct memory accessors in typeArrayOop.hpp should use Access API
eosterlund
parents:
48168
diff
changeset
|
3092 |
T* next_addr = (T*)java_lang_ref_Reference::next_addr_raw(obj); |
35877
a2a62511d0f8
8146987: Improve Parallel GC Full GC by caching results of live_words_in_range()
tschatzl
parents:
35862
diff
changeset
|
3093 |
PSParallelCompact::adjust_pointer(next_addr, cm); |
49041
44122f767467
8198286: Direct memory accessors in typeArrayOop.hpp should use Access API
eosterlund
parents:
48168
diff
changeset
|
3094 |
T* discovered_addr = (T*)java_lang_ref_Reference::discovered_addr_raw(obj); |
35877
a2a62511d0f8
8146987: Improve Parallel GC Full GC by caching results of live_words_in_range()
tschatzl
parents:
35862
diff
changeset
|
3095 |
PSParallelCompact::adjust_pointer(discovered_addr, cm); |
30150
d9c940aa42ef
8075955: Replace the macro based implementation of oop_oop_iterate with a template based solution
stefank
parents:
29798
diff
changeset
|
3096 |
debug_only(trace_reference_gc("InstanceRefKlass::oop_update_ptrs", obj, |
d9c940aa42ef
8075955: Replace the macro based implementation of oop_oop_iterate with a template based solution
stefank
parents:
29798
diff
changeset
|
3097 |
referent_addr, next_addr, discovered_addr);) |
d9c940aa42ef
8075955: Replace the macro based implementation of oop_oop_iterate with a template based solution
stefank
parents:
29798
diff
changeset
|
3098 |
} |
d9c940aa42ef
8075955: Replace the macro based implementation of oop_oop_iterate with a template based solution
stefank
parents:
29798
diff
changeset
|
3099 |
|
35877
a2a62511d0f8
8146987: Improve Parallel GC Full GC by caching results of live_words_in_range()
tschatzl
parents:
35862
diff
changeset
|
3100 |
void InstanceRefKlass::oop_pc_update_pointers(oop obj, ParCompactionManager* cm) { |
a2a62511d0f8
8146987: Improve Parallel GC Full GC by caching results of live_words_in_range()
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changeset
|
3101 |
InstanceKlass::oop_pc_update_pointers(obj, cm); |
30150
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8075955: Replace the macro based implementation of oop_oop_iterate with a template based solution
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|
3102 |
|
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8075955: Replace the macro based implementation of oop_oop_iterate with a template based solution
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|
3103 |
if (UseCompressedOops) { |
35877
a2a62511d0f8
8146987: Improve Parallel GC Full GC by caching results of live_words_in_range()
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diff
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|
3104 |
oop_pc_update_pointers_specialized<narrowOop>(obj, cm); |
30150
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8075955: Replace the macro based implementation of oop_oop_iterate with a template based solution
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|
3105 |
} else { |
35877
a2a62511d0f8
8146987: Improve Parallel GC Full GC by caching results of live_words_in_range()
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diff
changeset
|
3106 |
oop_pc_update_pointers_specialized<oop>(obj, cm); |
30150
d9c940aa42ef
8075955: Replace the macro based implementation of oop_oop_iterate with a template based solution
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|
3107 |
} |
d9c940aa42ef
8075955: Replace the macro based implementation of oop_oop_iterate with a template based solution
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diff
changeset
|
3108 |
} |
d9c940aa42ef
8075955: Replace the macro based implementation of oop_oop_iterate with a template based solution
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changeset
|
3109 |
|
35877
a2a62511d0f8
8146987: Improve Parallel GC Full GC by caching results of live_words_in_range()
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changeset
|
3110 |
void ObjArrayKlass::oop_pc_update_pointers(oop obj, ParCompactionManager* cm) { |
30150
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|
3111 |
assert(obj->is_objArray(), "obj must be obj array"); |
35877
a2a62511d0f8
8146987: Improve Parallel GC Full GC by caching results of live_words_in_range()
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diff
changeset
|
3112 |
PSParallelCompact::AdjustPointerClosure closure(cm); |
a2a62511d0f8
8146987: Improve Parallel GC Full GC by caching results of live_words_in_range()
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changeset
|
3113 |
oop_oop_iterate_elements<true>(objArrayOop(obj), &closure); |
30150
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|
3114 |
} |
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8075955: Replace the macro based implementation of oop_oop_iterate with a template based solution
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diff
changeset
|
3115 |
|
35877
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8146987: Improve Parallel GC Full GC by caching results of live_words_in_range()
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changeset
|
3116 |
void TypeArrayKlass::oop_pc_update_pointers(oop obj, ParCompactionManager* cm) { |
30150
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changeset
|
3117 |
assert(obj->is_typeArray(),"must be a type array"); |
d9c940aa42ef
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changeset
|
3118 |
} |
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|
3119 |
|
1 | 3120 |
ParMarkBitMapClosure::IterationStatus |
3121 |
MoveAndUpdateClosure::do_addr(HeapWord* addr, size_t words) { |
|
3122 |
assert(destination() != NULL, "sanity"); |
|
3123 |
assert(bitmap()->obj_size(addr) == words, "bad size"); |
|
3124 |
||
3125 |
_source = addr; |
|
35877
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diff
changeset
|
3126 |
assert(PSParallelCompact::summary_data().calc_new_pointer(source(), compaction_manager()) == |
1 | 3127 |
destination(), "wrong destination"); |
3128 |
||
3129 |
if (words > words_remaining()) { |
|
3130 |
return ParMarkBitMap::would_overflow; |
|
3131 |
} |
|
3132 |
||
3133 |
// The start_array must be updated even if the object is not moving. |
|
3134 |
if (_start_array != NULL) { |
|
3135 |
_start_array->allocate_block(destination()); |
|
3136 |
} |
|
3137 |
||
3138 |
if (destination() != source()) { |
|
1682
94ad5692b3a7
6784849: par compact - can fail when to_space is non-empty
jcoomes
parents:
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diff
changeset
|
3139 |
DEBUG_ONLY(PSParallelCompact::check_new_location(source(), destination());) |
1 | 3140 |
Copy::aligned_conjoint_words(source(), destination(), words); |
3141 |
} |
|
3142 |
||
3143 |
oop moved_oop = (oop) destination(); |
|
29792
8c6fa07f0869
8075957: Reduce calls to the GC specific object visitors in oopDesc
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diff
changeset
|
3144 |
compaction_manager()->update_contents(moved_oop); |
46968
9119841280f4
8160399: is_oop_or_null involves undefined behavior
coleenp
parents:
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diff
changeset
|
3145 |
assert(oopDesc::is_oop_or_null(moved_oop), "Expected an oop or NULL at " PTR_FORMAT, p2i(moved_oop)); |
1 | 3146 |
|
3147 |
update_state(words); |
|
3148 |
assert(destination() == (HeapWord*)moved_oop + moved_oop->size(), "sanity"); |
|
3149 |
return is_full() ? ParMarkBitMap::full : ParMarkBitMap::incomplete; |
|
3150 |
} |
|
3151 |
||
3152 |
UpdateOnlyClosure::UpdateOnlyClosure(ParMarkBitMap* mbm, |
|
3153 |
ParCompactionManager* cm, |
|
3154 |
PSParallelCompact::SpaceId space_id) : |
|
3155 |
ParMarkBitMapClosure(mbm, cm), |
|
3156 |
_space_id(space_id), |
|
3157 |
_start_array(PSParallelCompact::start_array(space_id)) |
|
3158 |
{ |
|
3159 |
} |
|
3160 |
||
3161 |
// Updates the references in the object to their new values. |
|
3162 |
ParMarkBitMapClosure::IterationStatus |
|
3163 |
UpdateOnlyClosure::do_addr(HeapWord* addr, size_t words) { |
|
3164 |
do_addr(addr); |
|
3165 |
return ParMarkBitMap::incomplete; |
|
3166 |
} |
|
35862
411842d0c882
8146395: Add inline qualifier in oop.hpp and fix inlining in gc files
goetz
parents:
35492
diff
changeset
|
3167 |
|
46502
116a09d8f142
8180755: Remove use of bitMap.inline.hpp include from instanceKlass.hpp and c1_ValueSet.hpp
tschatzl
parents:
42650
diff
changeset
|
3168 |
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:
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diff
changeset
|
3169 |
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
|
3170 |
_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:
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diff
changeset
|
3171 |
{ |
116a09d8f142
8180755: Remove use of bitMap.inline.hpp include from instanceKlass.hpp and c1_ValueSet.hpp
tschatzl
parents:
42650
diff
changeset
|
3172 |
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
|
3173 |
"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
|
3174 |
} |
116a09d8f142
8180755: Remove use of bitMap.inline.hpp include from instanceKlass.hpp and c1_ValueSet.hpp
tschatzl
parents:
42650
diff
changeset
|
3175 |
|
35862
411842d0c882
8146395: Add inline qualifier in oop.hpp and fix inlining in gc files
goetz
parents:
35492
diff
changeset
|
3176 |
ParMarkBitMapClosure::IterationStatus |
411842d0c882
8146395: Add inline qualifier in oop.hpp and fix inlining in gc files
goetz
parents:
35492
diff
changeset
|
3177 |
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
|
3178 |
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
|
3179 |
HeapWord* const end = addr + size; |
411842d0c882
8146395: Add inline qualifier in oop.hpp and fix inlining in gc files
goetz
parents:
35492
diff
changeset
|
3180 |
do { |
411842d0c882
8146395: Add inline qualifier in oop.hpp and fix inlining in gc files
goetz
parents:
35492
diff
changeset
|
3181 |
_start_array->allocate_block(addr); |
411842d0c882
8146395: Add inline qualifier in oop.hpp and fix inlining in gc files
goetz
parents:
35492
diff
changeset
|
3182 |
addr += oop(addr)->size(); |
411842d0c882
8146395: Add inline qualifier in oop.hpp and fix inlining in gc files
goetz
parents:
35492
diff
changeset
|
3183 |
} while (addr < end); |
411842d0c882
8146395: Add inline qualifier in oop.hpp and fix inlining in gc files
goetz
parents:
35492
diff
changeset
|
3184 |
return ParMarkBitMap::incomplete; |
411842d0c882
8146395: Add inline qualifier in oop.hpp and fix inlining in gc files
goetz
parents:
35492
diff
changeset
|
3185 |
} |