graal-compiler: src/share/vm/gc_implementation/parallelScavenge/psParallelCompact.cpp annotate

annotate src/share/vm/gc_implementation/parallelScavenge/psParallelCompact.cpp @ 10369:5534bd30c151

6725714: par compact - add a table to speed up bitmap searches Reviewed-by: jmasa, tschatzl

author	jcoomes
date	Thu, 30 May 2013 13:04:51 -0700
parents	eda078b01c65
children	f2110083203d

rev	line source
0 a61af66fc99e Initial load duke parents: diff changeset	1 /*
10288 eba99d16dc6f 8007763: Refactoring: split up compute_generation_free_space() into two functions for class PSAdaptiveSizePolicy tamao parents: 10285 diff changeset	2 * Copyright (c) 2005, 2013, Oracle and/or its affiliates. All rights reserved.
0 a61af66fc99e Initial load duke parents: diff changeset	3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
a61af66fc99e Initial load duke parents: diff changeset	4 *
a61af66fc99e Initial load duke parents: diff changeset	5 * This code is free software; you can redistribute it and/or modify it
a61af66fc99e Initial load duke parents: diff changeset	6 * under the terms of the GNU General Public License version 2 only, as
a61af66fc99e Initial load duke parents: diff changeset	7 * published by the Free Software Foundation.
a61af66fc99e Initial load duke parents: diff changeset	8 *
a61af66fc99e Initial load duke parents: diff changeset	9 * This code is distributed in the hope that it will be useful, but WITHOUT
a61af66fc99e Initial load duke parents: diff changeset	10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
a61af66fc99e Initial load duke parents: diff changeset	11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
a61af66fc99e Initial load duke parents: diff changeset	12 * version 2 for more details (a copy is included in the LICENSE file that
a61af66fc99e Initial load duke parents: diff changeset	13 * accompanied this code).
a61af66fc99e Initial load duke parents: diff changeset	14 *
a61af66fc99e Initial load duke parents: diff changeset	15 * You should have received a copy of the GNU General Public License version
a61af66fc99e Initial load duke parents: diff changeset	16 * 2 along with this work; if not, write to the Free Software Foundation,
a61af66fc99e Initial load duke parents: diff changeset	17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
a61af66fc99e Initial load duke parents: diff changeset	18 *
1552 c18cbe5936b8 6941466: Oracle rebranding changes for Hotspot repositories trims parents: 1489 diff changeset	19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
c18cbe5936b8 6941466: Oracle rebranding changes for Hotspot repositories trims parents: 1489 diff changeset	20 * or visit www.oracle.com if you need additional information or have any
c18cbe5936b8 6941466: Oracle rebranding changes for Hotspot repositories trims parents: 1489 diff changeset	21 * questions.
0 a61af66fc99e Initial load duke parents: diff changeset	22 *
a61af66fc99e Initial load duke parents: diff changeset	23 */
a61af66fc99e Initial load duke parents: diff changeset	24
1972 f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1836 diff changeset	25 #include "precompiled.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1836 diff changeset	26 #include "classfile/symbolTable.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1836 diff changeset	27 #include "classfile/systemDictionary.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1836 diff changeset	28 #include "code/codeCache.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1836 diff changeset	29 #include "gc_implementation/parallelScavenge/gcTaskManager.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1836 diff changeset	30 #include "gc_implementation/parallelScavenge/generationSizer.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1836 diff changeset	31 #include "gc_implementation/parallelScavenge/parallelScavengeHeap.inline.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1836 diff changeset	32 #include "gc_implementation/parallelScavenge/pcTasks.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1836 diff changeset	33 #include "gc_implementation/parallelScavenge/psAdaptiveSizePolicy.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1836 diff changeset	34 #include "gc_implementation/parallelScavenge/psCompactionManager.inline.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1836 diff changeset	35 #include "gc_implementation/parallelScavenge/psMarkSweep.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1836 diff changeset	36 #include "gc_implementation/parallelScavenge/psMarkSweepDecorator.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1836 diff changeset	37 #include "gc_implementation/parallelScavenge/psOldGen.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1836 diff changeset	38 #include "gc_implementation/parallelScavenge/psParallelCompact.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1836 diff changeset	39 #include "gc_implementation/parallelScavenge/psPromotionManager.inline.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1836 diff changeset	40 #include "gc_implementation/parallelScavenge/psScavenge.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1836 diff changeset	41 #include "gc_implementation/parallelScavenge/psYoungGen.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1836 diff changeset	42 #include "gc_implementation/shared/isGCActiveMark.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1836 diff changeset	43 #include "gc_interface/gcCause.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1836 diff changeset	44 #include "memory/gcLocker.inline.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1836 diff changeset	45 #include "memory/referencePolicy.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1836 diff changeset	46 #include "memory/referenceProcessor.hpp"
6725 da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	47 #include "oops/methodData.hpp"
1972 f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1836 diff changeset	48 #include "oops/oop.inline.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1836 diff changeset	49 #include "oops/oop.pcgc.inline.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1836 diff changeset	50 #include "runtime/fprofiler.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1836 diff changeset	51 #include "runtime/safepoint.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1836 diff changeset	52 #include "runtime/vmThread.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1836 diff changeset	53 #include "services/management.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1836 diff changeset	54 #include "services/memoryService.hpp"
6197 d2a62e0f25eb 6995781: Native Memory Tracking (Phase 1) zgu parents: 6064 diff changeset	55 #include "services/memTracker.hpp"
1972 f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1836 diff changeset	56 #include "utilities/events.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1836 diff changeset	57 #include "utilities/stack.inline.hpp"
0 a61af66fc99e Initial load duke parents: diff changeset	58
a61af66fc99e Initial load duke parents: diff changeset	59 #include <math.h>
a61af66fc99e Initial load duke parents: diff changeset	60
a61af66fc99e Initial load duke parents: diff changeset	61 // All sizes are in HeapWords.
10369 5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	62 const size_t ParallelCompactData::Log2RegionSize = 16; // 64K words
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	63 const size_t ParallelCompactData::RegionSize = (size_t)1 << Log2RegionSize;
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	64 const size_t ParallelCompactData::RegionSizeBytes =
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	65 RegionSize << LogHeapWordSize;
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	66 const size_t ParallelCompactData::RegionSizeOffsetMask = RegionSize - 1;
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	67 const size_t ParallelCompactData::RegionAddrOffsetMask = RegionSizeBytes - 1;
10369 5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	68 const size_t ParallelCompactData::RegionAddrMask = ~RegionAddrOffsetMask;
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	69
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	70 const size_t ParallelCompactData::Log2BlockSize = 7; // 128 words
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	71 const size_t ParallelCompactData::BlockSize = (size_t)1 << Log2BlockSize;
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	72 const size_t ParallelCompactData::BlockSizeBytes =
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	73 BlockSize << LogHeapWordSize;
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	74 const size_t ParallelCompactData::BlockSizeOffsetMask = BlockSize - 1;
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	75 const size_t ParallelCompactData::BlockAddrOffsetMask = BlockSizeBytes - 1;
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	76 const size_t ParallelCompactData::BlockAddrMask = ~BlockAddrOffsetMask;
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	77
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	78 const size_t ParallelCompactData::BlocksPerRegion = RegionSize / BlockSize;
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	79 const size_t ParallelCompactData::Log2BlocksPerRegion =
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	80 Log2RegionSize - Log2BlockSize;
0 a61af66fc99e Initial load duke parents: diff changeset	81
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	82 const ParallelCompactData::RegionData::region_sz_t
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	83 ParallelCompactData::RegionData::dc_shift = 27;
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	84
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	85 const ParallelCompactData::RegionData::region_sz_t
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	86 ParallelCompactData::RegionData::dc_mask = ~0U << dc_shift;
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	87
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	88 const ParallelCompactData::RegionData::region_sz_t
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	89 ParallelCompactData::RegionData::dc_one = 0x1U << dc_shift;
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	90
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	91 const ParallelCompactData::RegionData::region_sz_t
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	92 ParallelCompactData::RegionData::los_mask = ~dc_mask;
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	93
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	94 const ParallelCompactData::RegionData::region_sz_t
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	95 ParallelCompactData::RegionData::dc_claimed = 0x8U << dc_shift;
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	96
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	97 const ParallelCompactData::RegionData::region_sz_t
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	98 ParallelCompactData::RegionData::dc_completed = 0xcU << dc_shift;
0 a61af66fc99e Initial load duke parents: diff changeset	99
a61af66fc99e Initial load duke parents: diff changeset	100 SpaceInfo PSParallelCompact::_space_info[PSParallelCompact::last_space_id];
a61af66fc99e Initial load duke parents: diff changeset	101 bool PSParallelCompact::_print_phases = false;
a61af66fc99e Initial load duke parents: diff changeset	102
a61af66fc99e Initial load duke parents: diff changeset	103 ReferenceProcessor* PSParallelCompact::_ref_processor = NULL;
6725 da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	104 Klass* PSParallelCompact::_updated_int_array_klass_obj = NULL;
0 a61af66fc99e Initial load duke parents: diff changeset	105
a61af66fc99e Initial load duke parents: diff changeset	106 double PSParallelCompact::_dwl_mean;
a61af66fc99e Initial load duke parents: diff changeset	107 double PSParallelCompact::_dwl_std_dev;
a61af66fc99e Initial load duke parents: diff changeset	108 double PSParallelCompact::_dwl_first_term;
a61af66fc99e Initial load duke parents: diff changeset	109 double PSParallelCompact::_dwl_adjustment;
a61af66fc99e Initial load duke parents: diff changeset	110 #ifdef ASSERT
a61af66fc99e Initial load duke parents: diff changeset	111 bool PSParallelCompact::_dwl_initialized = false;
a61af66fc99e Initial load duke parents: diff changeset	112 #endif // #ifdef ASSERT
a61af66fc99e Initial load duke parents: diff changeset	113
482 7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	114 void SplitInfo::record(size_t src_region_idx, size_t partial_obj_size,
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	115 HeapWord* destination)
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	116 {
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	117 assert(src_region_idx != 0, "invalid src_region_idx");
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	118 assert(partial_obj_size != 0, "invalid partial_obj_size argument");
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	119 assert(destination != NULL, "invalid destination argument");
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	120
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	121 _src_region_idx = src_region_idx;
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	122 _partial_obj_size = partial_obj_size;
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	123 _destination = destination;
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	124
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	125 // These fields may not be updated below, so make sure they're clear.
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	126 assert(_dest_region_addr == NULL, "should have been cleared");
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	127 assert(_first_src_addr == NULL, "should have been cleared");
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	128
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	129 // Determine the number of destination regions for the partial object.
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	130 HeapWord* const last_word = destination + partial_obj_size - 1;
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	131 const ParallelCompactData& sd = PSParallelCompact::summary_data();
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	132 HeapWord* const beg_region_addr = sd.region_align_down(destination);
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	133 HeapWord* const end_region_addr = sd.region_align_down(last_word);
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	134
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	135 if (beg_region_addr == end_region_addr) {
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	136 // One destination region.
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	137 _destination_count = 1;
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	138 if (end_region_addr == destination) {
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	139 // The destination falls on a region boundary, thus the first word of the
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	140 // partial object will be the first word copied to the destination region.
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	141 _dest_region_addr = end_region_addr;
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	142 _first_src_addr = sd.region_to_addr(src_region_idx);
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	143 }
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	144 } else {
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	145 // Two destination regions. When copied, the partial object will cross a
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	146 // destination region boundary, so a word somewhere within the partial
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	147 // object will be the first word copied to the second destination region.
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	148 _destination_count = 2;
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	149 _dest_region_addr = end_region_addr;
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	150 const size_t ofs = pointer_delta(end_region_addr, destination);
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	151 assert(ofs < _partial_obj_size, "sanity");
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	152 _first_src_addr = sd.region_to_addr(src_region_idx) + ofs;
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	153 }
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	154 }
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	155
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	156 void SplitInfo::clear()
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	157 {
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	158 _src_region_idx = 0;
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	159 _partial_obj_size = 0;
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	160 _destination = NULL;
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	161 _destination_count = 0;
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	162 _dest_region_addr = NULL;
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	163 _first_src_addr = NULL;
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	164 assert(!is_valid(), "sanity");
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	165 }
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	166
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	167 #ifdef ASSERT
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	168 void SplitInfo::verify_clear()
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	169 {
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	170 assert(_src_region_idx == 0, "not clear");
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	171 assert(_partial_obj_size == 0, "not clear");
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	172 assert(_destination == NULL, "not clear");
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	173 assert(_destination_count == 0, "not clear");
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	174 assert(_dest_region_addr == NULL, "not clear");
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	175 assert(_first_src_addr == NULL, "not clear");
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	176 }
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	177 #endif // #ifdef ASSERT
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	178
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	179
9076 7b835924c31c 8011872: Include Bit Map addresses in the hs_err files stefank parents: 7448 diff changeset	180 void PSParallelCompact::print_on_error(outputStream* st) {
7b835924c31c 8011872: Include Bit Map addresses in the hs_err files stefank parents: 7448 diff changeset	181 _mark_bitmap.print_on_error(st);
7b835924c31c 8011872: Include Bit Map addresses in the hs_err files stefank parents: 7448 diff changeset	182 }
7b835924c31c 8011872: Include Bit Map addresses in the hs_err files stefank parents: 7448 diff changeset	183
0 a61af66fc99e Initial load duke parents: diff changeset	184 #ifndef PRODUCT
a61af66fc99e Initial load duke parents: diff changeset	185 const char* PSParallelCompact::space_names[] = {
6725 da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	186 "old ", "eden", "from", "to "
0 a61af66fc99e Initial load duke parents: diff changeset	187 };
a61af66fc99e Initial load duke parents: diff changeset	188
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	189 void PSParallelCompact::print_region_ranges()
0 a61af66fc99e Initial load duke parents: diff changeset	190 {
a61af66fc99e Initial load duke parents: diff changeset	191 tty->print_cr("space bottom top end new_top");
a61af66fc99e Initial load duke parents: diff changeset	192 tty->print_cr("------ ---------- ---------- ---------- ----------");
a61af66fc99e Initial load duke parents: diff changeset	193
a61af66fc99e Initial load duke parents: diff changeset	194 for (unsigned int id = 0; id < last_space_id; ++id) {
a61af66fc99e Initial load duke parents: diff changeset	195 const MutableSpace* space = _space_info[id].space();
a61af66fc99e Initial load duke parents: diff changeset	196 tty->print_cr("%u %s "
264 15dd2594d08e 6718283: existing uses of _FORMAT_W() were broken by 6521491 jcoomes* parents: 263 diff changeset	197 SIZE_FORMAT_W(10) " " SIZE_FORMAT_W(10) " "
15dd2594d08e 6718283: existing uses of _FORMAT_W() were broken by 6521491 jcoomes* parents: 263 diff changeset	198 SIZE_FORMAT_W(10) " " SIZE_FORMAT_W(10) " ",
0 a61af66fc99e Initial load duke parents: diff changeset	199 id, space_names[id],
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	200 summary_data().addr_to_region_idx(space->bottom()),
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	201 summary_data().addr_to_region_idx(space->top()),
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	202 summary_data().addr_to_region_idx(space->end()),
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	203 summary_data().addr_to_region_idx(_space_info[id].new_top()));
0 a61af66fc99e Initial load duke parents: diff changeset	204 }
a61af66fc99e Initial load duke parents: diff changeset	205 }
a61af66fc99e Initial load duke parents: diff changeset	206
a61af66fc99e Initial load duke parents: diff changeset	207 void
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	208 print_generic_summary_region(size_t i, const ParallelCompactData::RegionData* c)
0 a61af66fc99e Initial load duke parents: diff changeset	209 {
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	210 #define REGION_IDX_FORMAT SIZE_FORMAT_W(7)
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	211 #define REGION_DATA_FORMAT SIZE_FORMAT_W(5)
0 a61af66fc99e Initial load duke parents: diff changeset	212
a61af66fc99e Initial load duke parents: diff changeset	213 ParallelCompactData& sd = PSParallelCompact::summary_data();
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	214 size_t dci = c->destination() ? sd.addr_to_region_idx(c->destination()) : 0;
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	215 tty->print_cr(REGION_IDX_FORMAT " " PTR_FORMAT " "
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	216 REGION_IDX_FORMAT " " PTR_FORMAT " "
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	217 REGION_DATA_FORMAT " " REGION_DATA_FORMAT " "
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	218 REGION_DATA_FORMAT " " REGION_IDX_FORMAT " %d",
0 a61af66fc99e Initial load duke parents: diff changeset	219 i, c->data_location(), dci, c->destination(),
a61af66fc99e Initial load duke parents: diff changeset	220 c->partial_obj_size(), c->live_obj_size(),
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	221 c->data_size(), c->source_region(), c->destination_count());
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	222
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	223 #undef REGION_IDX_FORMAT
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	224 #undef REGION_DATA_FORMAT
0 a61af66fc99e Initial load duke parents: diff changeset	225 }
a61af66fc99e Initial load duke parents: diff changeset	226
a61af66fc99e Initial load duke parents: diff changeset	227 void
a61af66fc99e Initial load duke parents: diff changeset	228 print_generic_summary_data(ParallelCompactData& summary_data,
a61af66fc99e Initial load duke parents: diff changeset	229 HeapWord* const beg_addr,
a61af66fc99e Initial load duke parents: diff changeset	230 HeapWord* const end_addr)
a61af66fc99e Initial load duke parents: diff changeset	231 {
a61af66fc99e Initial load duke parents: diff changeset	232 size_t total_words = 0;
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	233 size_t i = summary_data.addr_to_region_idx(beg_addr);
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	234 const size_t last = summary_data.addr_to_region_idx(end_addr);
0 a61af66fc99e Initial load duke parents: diff changeset	235 HeapWord* pdest = 0;
a61af66fc99e Initial load duke parents: diff changeset	236
a61af66fc99e Initial load duke parents: diff changeset	237 while (i <= last) {
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	238 ParallelCompactData::RegionData* c = summary_data.region(i);
0 a61af66fc99e Initial load duke parents: diff changeset	239 if (c->data_size() != 0 \|\| c->destination() != pdest) {
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	240 print_generic_summary_region(i, c);
0 a61af66fc99e Initial load duke parents: diff changeset	241 total_words += c->data_size();
a61af66fc99e Initial load duke parents: diff changeset	242 pdest = c->destination();
a61af66fc99e Initial load duke parents: diff changeset	243 }
a61af66fc99e Initial load duke parents: diff changeset	244 ++i;
a61af66fc99e Initial load duke parents: diff changeset	245 }
a61af66fc99e Initial load duke parents: diff changeset	246
a61af66fc99e Initial load duke parents: diff changeset	247 tty->print_cr("summary_data_bytes=" SIZE_FORMAT, total_words * HeapWordSize);
a61af66fc99e Initial load duke parents: diff changeset	248 }
a61af66fc99e Initial load duke parents: diff changeset	249
a61af66fc99e Initial load duke parents: diff changeset	250 void
a61af66fc99e Initial load duke parents: diff changeset	251 print_generic_summary_data(ParallelCompactData& summary_data,
a61af66fc99e Initial load duke parents: diff changeset	252 SpaceInfo* space_info)
a61af66fc99e Initial load duke parents: diff changeset	253 {
a61af66fc99e Initial load duke parents: diff changeset	254 for (unsigned int id = 0; id < PSParallelCompact::last_space_id; ++id) {
a61af66fc99e Initial load duke parents: diff changeset	255 const MutableSpace* space = space_info[id].space();
a61af66fc99e Initial load duke parents: diff changeset	256 print_generic_summary_data(summary_data, space->bottom(),
a61af66fc99e Initial load duke parents: diff changeset	257 MAX2(space->top(), space_info[id].new_top()));
a61af66fc99e Initial load duke parents: diff changeset	258 }
a61af66fc99e Initial load duke parents: diff changeset	259 }
a61af66fc99e Initial load duke parents: diff changeset	260
a61af66fc99e Initial load duke parents: diff changeset	261 void
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	262 print_initial_summary_region(size_t i,
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	263 const ParallelCompactData::RegionData* c,
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	264 bool newline = true)
0 a61af66fc99e Initial load duke parents: diff changeset	265 {
264 15dd2594d08e 6718283: existing uses of _FORMAT_W() were broken by 6521491 jcoomes* parents: 263 diff changeset	266 tty->print(SIZE_FORMAT_W(5) " " PTR_FORMAT " "
15dd2594d08e 6718283: existing uses of _FORMAT_W() were broken by 6521491 jcoomes* parents: 263 diff changeset	267 SIZE_FORMAT_W(5) " " SIZE_FORMAT_W(5) " "
15dd2594d08e 6718283: existing uses of _FORMAT_W() were broken by 6521491 jcoomes* parents: 263 diff changeset	268 SIZE_FORMAT_W(5) " " SIZE_FORMAT_W(5) " %d",
0 a61af66fc99e Initial load duke parents: diff changeset	269 i, c->destination(),
a61af66fc99e Initial load duke parents: diff changeset	270 c->partial_obj_size(), c->live_obj_size(),
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	271 c->data_size(), c->source_region(), c->destination_count());
0 a61af66fc99e Initial load duke parents: diff changeset	272 if (newline) tty->cr();
a61af66fc99e Initial load duke parents: diff changeset	273 }
a61af66fc99e Initial load duke parents: diff changeset	274
a61af66fc99e Initial load duke parents: diff changeset	275 void
a61af66fc99e Initial load duke parents: diff changeset	276 print_initial_summary_data(ParallelCompactData& summary_data,
a61af66fc99e Initial load duke parents: diff changeset	277 const MutableSpace* space) {
a61af66fc99e Initial load duke parents: diff changeset	278 if (space->top() == space->bottom()) {
a61af66fc99e Initial load duke parents: diff changeset	279 return;
a61af66fc99e Initial load duke parents: diff changeset	280 }
a61af66fc99e Initial load duke parents: diff changeset	281
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	282 const size_t region_size = ParallelCompactData::RegionSize;
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	283 typedef ParallelCompactData::RegionData RegionData;
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	284 HeapWord* const top_aligned_up = summary_data.region_align_up(space->top());
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	285 const size_t end_region = summary_data.addr_to_region_idx(top_aligned_up);
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	286 const RegionData* c = summary_data.region(end_region - 1);
0 a61af66fc99e Initial load duke parents: diff changeset	287 HeapWord* end_addr = c->destination() + c->data_size();
a61af66fc99e Initial load duke parents: diff changeset	288 const size_t live_in_space = pointer_delta(end_addr, space->bottom());
a61af66fc99e Initial load duke parents: diff changeset	289
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	290 // Print (and count) the full regions at the beginning of the space.
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	291 size_t full_region_count = 0;
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	292 size_t i = summary_data.addr_to_region_idx(space->bottom());
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	293 while (i < end_region && summary_data.region(i)->data_size() == region_size) {
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	294 print_initial_summary_region(i, summary_data.region(i));
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	295 ++full_region_count;
0 a61af66fc99e Initial load duke parents: diff changeset	296 ++i;
a61af66fc99e Initial load duke parents: diff changeset	297 }
a61af66fc99e Initial load duke parents: diff changeset	298
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	299 size_t live_to_right = live_in_space - full_region_count * region_size;
0 a61af66fc99e Initial load duke parents: diff changeset	300
a61af66fc99e Initial load duke parents: diff changeset	301 double max_reclaimed_ratio = 0.0;
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	302 size_t max_reclaimed_ratio_region = 0;
0 a61af66fc99e Initial load duke parents: diff changeset	303 size_t max_dead_to_right = 0;
a61af66fc99e Initial load duke parents: diff changeset	304 size_t max_live_to_right = 0;
a61af66fc99e Initial load duke parents: diff changeset	305
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	306 // Print the 'reclaimed ratio' for regions while there is something live in
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	307 // the region or to the right of it. The remaining regions are empty (and
0 a61af66fc99e Initial load duke parents: diff changeset	308 // uninteresting), and computing the ratio will result in division by 0.
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	309 while (i < end_region && live_to_right > 0) {
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	310 c = summary_data.region(i);
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	311 HeapWord* const region_addr = summary_data.region_to_addr(i);
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	312 const size_t used_to_right = pointer_delta(space->top(), region_addr);
0 a61af66fc99e Initial load duke parents: diff changeset	313 const size_t dead_to_right = used_to_right - live_to_right;
a61af66fc99e Initial load duke parents: diff changeset	314 const double reclaimed_ratio = double(dead_to_right) / live_to_right;
a61af66fc99e Initial load duke parents: diff changeset	315
a61af66fc99e Initial load duke parents: diff changeset	316 if (reclaimed_ratio > max_reclaimed_ratio) {
a61af66fc99e Initial load duke parents: diff changeset	317 max_reclaimed_ratio = reclaimed_ratio;
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	318 max_reclaimed_ratio_region = i;
0 a61af66fc99e Initial load duke parents: diff changeset	319 max_dead_to_right = dead_to_right;
a61af66fc99e Initial load duke parents: diff changeset	320 max_live_to_right = live_to_right;
a61af66fc99e Initial load duke parents: diff changeset	321 }
a61af66fc99e Initial load duke parents: diff changeset	322
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	323 print_initial_summary_region(i, c, false);
264 15dd2594d08e 6718283: existing uses of _FORMAT_W() were broken by 6521491 jcoomes* parents: 263 diff changeset	324 tty->print_cr(" %12.10f " SIZE_FORMAT_W(10) " " SIZE_FORMAT_W(10),
0 a61af66fc99e Initial load duke parents: diff changeset	325 reclaimed_ratio, dead_to_right, live_to_right);
a61af66fc99e Initial load duke parents: diff changeset	326
a61af66fc99e Initial load duke parents: diff changeset	327 live_to_right -= c->data_size();
a61af66fc99e Initial load duke parents: diff changeset	328 ++i;
a61af66fc99e Initial load duke parents: diff changeset	329 }
a61af66fc99e Initial load duke parents: diff changeset	330
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	331 // Any remaining regions are empty. Print one more if there is one.
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	332 if (i < end_region) {
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	333 print_initial_summary_region(i, summary_data.region(i));
0 a61af66fc99e Initial load duke parents: diff changeset	334 }
a61af66fc99e Initial load duke parents: diff changeset	335
264 15dd2594d08e 6718283: existing uses of _FORMAT_W() were broken by 6521491 jcoomes* parents: 263 diff changeset	336 tty->print_cr("max: " SIZE_FORMAT_W(4) " d2r=" SIZE_FORMAT_W(10) " "
15dd2594d08e 6718283: existing uses of _FORMAT_W() were broken by 6521491 jcoomes* parents: 263 diff changeset	337 "l2r=" SIZE_FORMAT_W(10) " max_ratio=%14.12f",
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	338 max_reclaimed_ratio_region, max_dead_to_right,
0 a61af66fc99e Initial load duke parents: diff changeset	339 max_live_to_right, max_reclaimed_ratio);
a61af66fc99e Initial load duke parents: diff changeset	340 }
a61af66fc99e Initial load duke parents: diff changeset	341
a61af66fc99e Initial load duke parents: diff changeset	342 void
a61af66fc99e Initial load duke parents: diff changeset	343 print_initial_summary_data(ParallelCompactData& summary_data,
a61af66fc99e Initial load duke parents: diff changeset	344 SpaceInfo* space_info) {
6725 da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	345 unsigned int id = PSParallelCompact::old_space_id;
0 a61af66fc99e Initial load duke parents: diff changeset	346 const MutableSpace* space;
a61af66fc99e Initial load duke parents: diff changeset	347 do {
a61af66fc99e Initial load duke parents: diff changeset	348 space = space_info[id].space();
a61af66fc99e Initial load duke parents: diff changeset	349 print_initial_summary_data(summary_data, space);
a61af66fc99e Initial load duke parents: diff changeset	350 } while (++id < PSParallelCompact::eden_space_id);
a61af66fc99e Initial load duke parents: diff changeset	351
a61af66fc99e Initial load duke parents: diff changeset	352 do {
a61af66fc99e Initial load duke parents: diff changeset	353 space = space_info[id].space();
a61af66fc99e Initial load duke parents: diff changeset	354 print_generic_summary_data(summary_data, space->bottom(), space->top());
a61af66fc99e Initial load duke parents: diff changeset	355 } while (++id < PSParallelCompact::last_space_id);
a61af66fc99e Initial load duke parents: diff changeset	356 }
a61af66fc99e Initial load duke parents: diff changeset	357 #endif // #ifndef PRODUCT
a61af66fc99e Initial load duke parents: diff changeset	358
a61af66fc99e Initial load duke parents: diff changeset	359 #ifdef ASSERT
a61af66fc99e Initial load duke parents: diff changeset	360 size_t add_obj_count;
a61af66fc99e Initial load duke parents: diff changeset	361 size_t add_obj_size;
a61af66fc99e Initial load duke parents: diff changeset	362 size_t mark_bitmap_count;
a61af66fc99e Initial load duke parents: diff changeset	363 size_t mark_bitmap_size;
a61af66fc99e Initial load duke parents: diff changeset	364 #endif // #ifdef ASSERT
a61af66fc99e Initial load duke parents: diff changeset	365
a61af66fc99e Initial load duke parents: diff changeset	366 ParallelCompactData::ParallelCompactData()
a61af66fc99e Initial load duke parents: diff changeset	367 {
a61af66fc99e Initial load duke parents: diff changeset	368 _region_start = 0;
a61af66fc99e Initial load duke parents: diff changeset	369
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	370 _region_vspace = 0;
10329 10f759898d40 7186737: Unable to allocate bit maps or card tables for parallel gc for the requested heap tamao parents: 10327 diff changeset	371 _reserved_byte_size = 0;
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	372 _region_data = 0;
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	373 _region_count = 0;
10369 5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	374
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	375 _block_vspace = 0;
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	376 _block_data = 0;
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	377 _block_count = 0;
0 a61af66fc99e Initial load duke parents: diff changeset	378 }
a61af66fc99e Initial load duke parents: diff changeset	379
a61af66fc99e Initial load duke parents: diff changeset	380 bool ParallelCompactData::initialize(MemRegion covered_region)
a61af66fc99e Initial load duke parents: diff changeset	381 {
a61af66fc99e Initial load duke parents: diff changeset	382 _region_start = covered_region.start();
a61af66fc99e Initial load duke parents: diff changeset	383 const size_t region_size = covered_region.word_size();
a61af66fc99e Initial load duke parents: diff changeset	384 DEBUG_ONLY(_region_end = _region_start + region_size;)
a61af66fc99e Initial load duke parents: diff changeset	385
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	386 assert(region_align_down(_region_start) == _region_start,
0 a61af66fc99e Initial load duke parents: diff changeset	387 "region start not aligned");
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	388 assert((region_size & RegionSizeOffsetMask) == 0,
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	389 "region size not a multiple of RegionSize");
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	390
10369 5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	391 bool result = initialize_region_data(region_size) && initialize_block_data();
0 a61af66fc99e Initial load duke parents: diff changeset	392 return result;
a61af66fc99e Initial load duke parents: diff changeset	393 }
a61af66fc99e Initial load duke parents: diff changeset	394
a61af66fc99e Initial load duke parents: diff changeset	395 PSVirtualSpace*
a61af66fc99e Initial load duke parents: diff changeset	396 ParallelCompactData::create_vspace(size_t count, size_t element_size)
a61af66fc99e Initial load duke parents: diff changeset	397 {
a61af66fc99e Initial load duke parents: diff changeset	398 const size_t raw_bytes = count * element_size;
a61af66fc99e Initial load duke parents: diff changeset	399 const size_t page_sz = os::page_size_for_region(raw_bytes, raw_bytes, 10);
a61af66fc99e Initial load duke parents: diff changeset	400 const size_t granularity = os::vm_allocation_granularity();
10329 10f759898d40 7186737: Unable to allocate bit maps or card tables for parallel gc for the requested heap tamao parents: 10327 diff changeset	401 _reserved_byte_size = align_size_up(raw_bytes, MAX2(page_sz, granularity));
0 a61af66fc99e Initial load duke parents: diff changeset	402
a61af66fc99e Initial load duke parents: diff changeset	403 const size_t rs_align = page_sz == (size_t) os::vm_page_size() ? 0 :
a61af66fc99e Initial load duke parents: diff changeset	404 MAX2(page_sz, granularity);
10329 10f759898d40 7186737: Unable to allocate bit maps or card tables for parallel gc for the requested heap tamao parents: 10327 diff changeset	405 ReservedSpace rs(_reserved_byte_size, rs_align, rs_align > 0);
0 a61af66fc99e Initial load duke parents: diff changeset	406 os::trace_page_sizes("par compact", raw_bytes, raw_bytes, page_sz, rs.base(),
a61af66fc99e Initial load duke parents: diff changeset	407 rs.size());
6197 d2a62e0f25eb 6995781: Native Memory Tracking (Phase 1) zgu parents: 6064 diff changeset	408
d2a62e0f25eb 6995781: Native Memory Tracking (Phase 1) zgu parents: 6064 diff changeset	409 MemTracker::record_virtual_memory_type((address)rs.base(), mtGC);
d2a62e0f25eb 6995781: Native Memory Tracking (Phase 1) zgu parents: 6064 diff changeset	410
0 a61af66fc99e Initial load duke parents: diff changeset	411 PSVirtualSpace* vspace = new PSVirtualSpace(rs, page_sz);
a61af66fc99e Initial load duke parents: diff changeset	412 if (vspace != 0) {
10329 10f759898d40 7186737: Unable to allocate bit maps or card tables for parallel gc for the requested heap tamao parents: 10327 diff changeset	413 if (vspace->expand_by(_reserved_byte_size)) {
0 a61af66fc99e Initial load duke parents: diff changeset	414 return vspace;
a61af66fc99e Initial load duke parents: diff changeset	415 }
a61af66fc99e Initial load duke parents: diff changeset	416 delete vspace;
237 1fdb98a17101 6716785: implicit null checks not triggering with CompressedOops coleenp parents: 235 diff changeset	417 // Release memory reserved in the space.
1fdb98a17101 6716785: implicit null checks not triggering with CompressedOops coleenp parents: 235 diff changeset	418 rs.release();
0 a61af66fc99e Initial load duke parents: diff changeset	419 }
a61af66fc99e Initial load duke parents: diff changeset	420
a61af66fc99e Initial load duke parents: diff changeset	421 return 0;
a61af66fc99e Initial load duke parents: diff changeset	422 }
a61af66fc99e Initial load duke parents: diff changeset	423
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	424 bool ParallelCompactData::initialize_region_data(size_t region_size)
0 a61af66fc99e Initial load duke parents: diff changeset	425 {
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	426 const size_t count = (region_size + RegionSizeOffsetMask) >> Log2RegionSize;
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	427 _region_vspace = create_vspace(count, sizeof(RegionData));
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	428 if (_region_vspace != 0) {
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	429 _region_data = (RegionData*)_region_vspace->reserved_low_addr();
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	430 _region_count = count;
0 a61af66fc99e Initial load duke parents: diff changeset	431 return true;
a61af66fc99e Initial load duke parents: diff changeset	432 }
a61af66fc99e Initial load duke parents: diff changeset	433 return false;
a61af66fc99e Initial load duke parents: diff changeset	434 }
a61af66fc99e Initial load duke parents: diff changeset	435
10369 5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	436 bool ParallelCompactData::initialize_block_data()
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	437 {
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	438 assert(_region_count != 0, "region data must be initialized first");
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	439 const size_t count = _region_count << Log2BlocksPerRegion;
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	440 _block_vspace = create_vspace(count, sizeof(BlockData));
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	441 if (_block_vspace != 0) {
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	442 _block_data = (BlockData*)_block_vspace->reserved_low_addr();
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	443 _block_count = count;
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	444 return true;
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	445 }
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	446 return false;
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	447 }
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	448
0 a61af66fc99e Initial load duke parents: diff changeset	449 void ParallelCompactData::clear()
a61af66fc99e Initial load duke parents: diff changeset	450 {
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	451 memset(_region_data, 0, _region_vspace->committed_size());
10369 5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	452 memset(_block_data, 0, _block_vspace->committed_size());
0 a61af66fc99e Initial load duke parents: diff changeset	453 }
a61af66fc99e Initial load duke parents: diff changeset	454
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	455 void ParallelCompactData::clear_range(size_t beg_region, size_t end_region) {
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	456 assert(beg_region <= _region_count, "beg_region out of range");
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	457 assert(end_region <= _region_count, "end_region out of range");
10369 5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	458 assert(RegionSize % BlockSize == 0, "RegionSize not a multiple of BlockSize");
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	459
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	460 const size_t region_cnt = end_region - beg_region;
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	461 memset(_region_data + beg_region, 0, region_cnt * sizeof(RegionData));
10369 5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	462
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	463 const size_t beg_block = beg_region * BlocksPerRegion;
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	464 const size_t block_cnt = region_cnt * BlocksPerRegion;
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	465 memset(_block_data + beg_block, 0, block_cnt * sizeof(BlockData));
0 a61af66fc99e Initial load duke parents: diff changeset	466 }
a61af66fc99e Initial load duke parents: diff changeset	467
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	468 HeapWord* ParallelCompactData::partial_obj_end(size_t region_idx) const
0 a61af66fc99e Initial load duke parents: diff changeset	469 {
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	470 const RegionData* cur_cp = region(region_idx);
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	471 const RegionData* const end_cp = region(region_count() - 1);
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	472
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	473 HeapWord* result = region_to_addr(region_idx);
0 a61af66fc99e Initial load duke parents: diff changeset	474 if (cur_cp < end_cp) {
a61af66fc99e Initial load duke parents: diff changeset	475 do {
a61af66fc99e Initial load duke parents: diff changeset	476 result += cur_cp->partial_obj_size();
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	477 } while (cur_cp->partial_obj_size() == RegionSize && ++cur_cp < end_cp);
0 a61af66fc99e Initial load duke parents: diff changeset	478 }
a61af66fc99e Initial load duke parents: diff changeset	479 return result;
a61af66fc99e Initial load duke parents: diff changeset	480 }
a61af66fc99e Initial load duke parents: diff changeset	481
a61af66fc99e Initial load duke parents: diff changeset	482 void ParallelCompactData::add_obj(HeapWord* addr, size_t len)
a61af66fc99e Initial load duke parents: diff changeset	483 {
a61af66fc99e Initial load duke parents: diff changeset	484 const size_t obj_ofs = pointer_delta(addr, _region_start);
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	485 const size_t beg_region = obj_ofs >> Log2RegionSize;
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	486 const size_t end_region = (obj_ofs + len - 1) >> Log2RegionSize;
0 a61af66fc99e Initial load duke parents: diff changeset	487
a61af66fc99e Initial load duke parents: diff changeset	488 DEBUG_ONLY(Atomic::inc_ptr(&add_obj_count);)
a61af66fc99e Initial load duke parents: diff changeset	489 DEBUG_ONLY(Atomic::add_ptr(len, &add_obj_size);)
a61af66fc99e Initial load duke parents: diff changeset	490
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	491 if (beg_region == end_region) {
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	492 // All in one region.
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	493 _region_data[beg_region].add_live_obj(len);
0 a61af66fc99e Initial load duke parents: diff changeset	494 return;
a61af66fc99e Initial load duke parents: diff changeset	495 }
a61af66fc99e Initial load duke parents: diff changeset	496
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	497 // First region.
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	498 const size_t beg_ofs = region_offset(addr);
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	499 _region_data[beg_region].add_live_obj(RegionSize - beg_ofs);
0 a61af66fc99e Initial load duke parents: diff changeset	500
6725 da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	501 Klass* klass = ((oop)addr)->klass();
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	502 // Middle regions--completely spanned by this object.
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	503 for (size_t region = beg_region + 1; region < end_region; ++region) {
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	504 _region_data[region].set_partial_obj_size(RegionSize);
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	505 _region_data[region].set_partial_obj_addr(addr);
0 a61af66fc99e Initial load duke parents: diff changeset	506 }
a61af66fc99e Initial load duke parents: diff changeset	507
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	508 // Last region.
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	509 const size_t end_ofs = region_offset(addr + len - 1);
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	510 _region_data[end_region].set_partial_obj_size(end_ofs + 1);
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	511 _region_data[end_region].set_partial_obj_addr(addr);
0 a61af66fc99e Initial load duke parents: diff changeset	512 }
a61af66fc99e Initial load duke parents: diff changeset	513
a61af66fc99e Initial load duke parents: diff changeset	514 void
a61af66fc99e Initial load duke parents: diff changeset	515 ParallelCompactData::summarize_dense_prefix(HeapWord* beg, HeapWord* end)
a61af66fc99e Initial load duke parents: diff changeset	516 {
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	517 assert(region_offset(beg) == 0, "not RegionSize aligned");
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	518 assert(region_offset(end) == 0, "not RegionSize aligned");
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	519
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	520 size_t cur_region = addr_to_region_idx(beg);
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	521 const size_t end_region = addr_to_region_idx(end);
0 a61af66fc99e Initial load duke parents: diff changeset	522 HeapWord* addr = beg;
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	523 while (cur_region < end_region) {
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	524 _region_data[cur_region].set_destination(addr);
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	525 _region_data[cur_region].set_destination_count(0);
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	526 _region_data[cur_region].set_source_region(cur_region);
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	527 _region_data[cur_region].set_data_location(addr);
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	528
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	529 // Update live_obj_size so the region appears completely full.
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	530 size_t live_size = RegionSize - _region_data[cur_region].partial_obj_size();
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	531 _region_data[cur_region].set_live_obj_size(live_size);
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	532
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	533 ++cur_region;
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	534 addr += RegionSize;
0 a61af66fc99e Initial load duke parents: diff changeset	535 }
a61af66fc99e Initial load duke parents: diff changeset	536 }
a61af66fc99e Initial load duke parents: diff changeset	537
482 7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	538 // Find the point at which a space can be split and, if necessary, record the
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	539 // split point.
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	540 //
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	541 // If the current src region (which overflowed the destination space) doesn't
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	542 // have a partial object, the split point is at the beginning of the current src
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	543 // region (an "easy" split, no extra bookkeeping required).
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	544 //
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	545 // If the current src region has a partial object, the split point is in the
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	546 // region where that partial object starts (call it the split_region). If
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	547 // split_region has a partial object, then the split point is just after that
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	548 // partial object (a "hard" split where we have to record the split data and
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	549 // zero the partial_obj_size field). With a "hard" split, we know that the
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	550 // partial_obj ends within split_region because the partial object that caused
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	551 // the overflow starts in split_region. If split_region doesn't have a partial
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	552 // obj, then the split is at the beginning of split_region (another "easy"
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	553 // split).
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	554 HeapWord*
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	555 ParallelCompactData::summarize_split_space(size_t src_region,
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	556 SplitInfo& split_info,
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	557 HeapWord* destination,
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	558 HeapWord* target_end,
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	559 HeapWord** target_next)
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	560 {
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	561 assert(destination <= target_end, "sanity");
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	562 assert(destination + _region_data[src_region].data_size() > target_end,
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	563 "region should not fit into target space");
696 f18338cf04b0 6810474: par compact - crash in summary_phase with very full heap jcoomes parents: 628 diff changeset	564 assert(is_region_aligned(target_end), "sanity");
482 7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	565
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	566 size_t split_region = src_region;
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	567 HeapWord* split_destination = destination;
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	568 size_t partial_obj_size = _region_data[src_region].partial_obj_size();
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	569
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	570 if (destination + partial_obj_size > target_end) {
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	571 // The split point is just after the partial object (if any) in the
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	572 // src_region that contains the start of the object that overflowed the
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	573 // destination space.
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	574 //
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	575 // Find the start of the "overflow" object and set split_region to the
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	576 // region containing it.
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	577 HeapWord* const overflow_obj = _region_data[src_region].partial_obj_addr();
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	578 split_region = addr_to_region_idx(overflow_obj);
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	579
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	580 // Clear the source_region field of all destination regions whose first word
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	581 // came from data after the split point (a non-null source_region field
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	582 // implies a region must be filled).
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	583 //
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	584 // An alternative to the simple loop below: clear during post_compact(),
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	585 // which uses memcpy instead of individual stores, and is easy to
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	586 // parallelize. (The downside is that it clears the entire RegionData
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	587 // object as opposed to just one field.)
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	588 //
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	589 // post_compact() would have to clear the summary data up to the highest
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	590 // address that was written during the summary phase, which would be
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	591 //
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	592 // max(top, max(new_top, clear_top))
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	593 //
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	594 // where clear_top is a new field in SpaceInfo. Would have to set clear_top
696 f18338cf04b0 6810474: par compact - crash in summary_phase with very full heap jcoomes parents: 628 diff changeset	595 // to target_end.
482 7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	596 const RegionData* const sr = region(split_region);
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	597 const size_t beg_idx =
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	598 addr_to_region_idx(region_align_up(sr->destination() +
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	599 sr->partial_obj_size()));
696 f18338cf04b0 6810474: par compact - crash in summary_phase with very full heap jcoomes parents: 628 diff changeset	600 const size_t end_idx = addr_to_region_idx(target_end);
482 7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	601
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	602 if (TraceParallelOldGCSummaryPhase) {
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	603 gclog_or_tty->print_cr("split: clearing source_region field in ["
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	604 SIZE_FORMAT ", " SIZE_FORMAT ")",
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	605 beg_idx, end_idx);
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	606 }
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	607 for (size_t idx = beg_idx; idx < end_idx; ++idx) {
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	608 _region_data[idx].set_source_region(0);
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	609 }
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	610
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	611 // Set split_destination and partial_obj_size to reflect the split region.
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	612 split_destination = sr->destination();
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	613 partial_obj_size = sr->partial_obj_size();
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	614 }
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	615
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	616 // The split is recorded only if a partial object extends onto the region.
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	617 if (partial_obj_size != 0) {
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	618 _region_data[split_region].set_partial_obj_size(0);
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	619 split_info.record(split_region, partial_obj_size, split_destination);
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	620 }
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	621
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	622 // Setup the continuation addresses.
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	623 *target_next = split_destination + partial_obj_size;
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	624 HeapWord* const source_next = region_to_addr(split_region) + partial_obj_size;
0 a61af66fc99e Initial load duke parents: diff changeset	625
a61af66fc99e Initial load duke parents: diff changeset	626 if (TraceParallelOldGCSummaryPhase) {
482 7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	627 const char * split_type = partial_obj_size == 0 ? "easy" : "hard";
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	628 gclog_or_tty->print_cr("%s split: src=" PTR_FORMAT " src_c=" SIZE_FORMAT
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	629 " pos=" SIZE_FORMAT,
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	630 split_type, source_next, split_region,
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	631 partial_obj_size);
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	632 gclog_or_tty->print_cr("%s split: dst=" PTR_FORMAT " dst_c=" SIZE_FORMAT
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	633 " tn=" PTR_FORMAT,
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	634 split_type, split_destination,
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	635 addr_to_region_idx(split_destination),
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	636 *target_next);
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	637
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	638 if (partial_obj_size != 0) {
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	639 HeapWord* const po_beg = split_info.destination();
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	640 HeapWord* const po_end = po_beg + split_info.partial_obj_size();
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	641 gclog_or_tty->print_cr("%s split: "
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	642 "po_beg=" PTR_FORMAT " " SIZE_FORMAT " "
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	643 "po_end=" PTR_FORMAT " " SIZE_FORMAT,
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	644 split_type,
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	645 po_beg, addr_to_region_idx(po_beg),
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	646 po_end, addr_to_region_idx(po_end));
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	647 }
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	648 }
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	649
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	650 return source_next;
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	651 }
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	652
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	653 bool ParallelCompactData::summarize(SplitInfo& split_info,
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	654 HeapWord* source_beg, HeapWord* source_end,
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	655 HeapWord** source_next,
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	656 HeapWord* target_beg, HeapWord* target_end,
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	657 HeapWord** target_next)
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	658 {
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	659 if (TraceParallelOldGCSummaryPhase) {
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	660 HeapWord* const source_next_val = source_next == NULL ? NULL : *source_next;
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	661 tty->print_cr("sb=" PTR_FORMAT " se=" PTR_FORMAT " sn=" PTR_FORMAT
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	662 "tb=" PTR_FORMAT " te=" PTR_FORMAT " tn=" PTR_FORMAT,
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	663 source_beg, source_end, source_next_val,
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	664 target_beg, target_end, *target_next);
0 a61af66fc99e Initial load duke parents: diff changeset	665 }
a61af66fc99e Initial load duke parents: diff changeset	666
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	667 size_t cur_region = addr_to_region_idx(source_beg);
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	668 const size_t end_region = addr_to_region_idx(region_align_up(source_end));
0 a61af66fc99e Initial load duke parents: diff changeset	669
a61af66fc99e Initial load duke parents: diff changeset	670 HeapWord *dest_addr = target_beg;
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	671 while (cur_region < end_region) {
482 7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	672 // The destination must be set even if the region has no data.
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	673 _region_data[cur_region].set_destination(dest_addr);
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	674
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	675 size_t words = _region_data[cur_region].data_size();
0 a61af66fc99e Initial load duke parents: diff changeset	676 if (words > 0) {
482 7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	677 // If cur_region does not fit entirely into the target space, find a point
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	678 // at which the source space can be 'split' so that part is copied to the
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	679 // target space and the rest is copied elsewhere.
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	680 if (dest_addr + words > target_end) {
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	681 assert(source_next != NULL, "source_next is NULL when splitting");
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	682 *source_next = summarize_split_space(cur_region, split_info, dest_addr,
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	683 target_end, target_next);
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	684 return false;
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	685 }
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	686
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	687 // Compute the destination_count for cur_region, and if necessary, update
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	688 // source_region for a destination region. The source_region field is
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	689 // updated if cur_region is the first (left-most) region to be copied to a
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	690 // destination region.
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	691 //
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	692 // The destination_count calculation is a bit subtle. A region that has
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	693 // data that compacts into itself does not count itself as a destination.
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	694 // This maintains the invariant that a zero count means the region is
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	695 // available and can be claimed and then filled.
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	696 uint destination_count = 0;
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	697 if (split_info.is_split(cur_region)) {
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	698 // The current region has been split: the partial object will be copied
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	699 // to one destination space and the remaining data will be copied to
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	700 // another destination space. Adjust the initial destination_count and,
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	701 // if necessary, set the source_region field if the partial object will
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	702 // cross a destination region boundary.
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	703 destination_count = split_info.destination_count();
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	704 if (destination_count == 2) {
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	705 size_t dest_idx = addr_to_region_idx(split_info.dest_region_addr());
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	706 _region_data[dest_idx].set_source_region(cur_region);
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	707 }
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	708 }
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	709
0 a61af66fc99e Initial load duke parents: diff changeset	710 HeapWord* const last_addr = dest_addr + words - 1;
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	711 const size_t dest_region_1 = addr_to_region_idx(dest_addr);
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	712 const size_t dest_region_2 = addr_to_region_idx(last_addr);
482 7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	713
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	714 // Initially assume that the destination regions will be the same and
0 a61af66fc99e Initial load duke parents: diff changeset	715 // adjust the value below if necessary. Under this assumption, if
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	716 // cur_region == dest_region_2, then cur_region will be compacted
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	717 // completely into itself.
482 7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	718 destination_count += cur_region == dest_region_2 ? 0 : 1;
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	719 if (dest_region_1 != dest_region_2) {
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	720 // Destination regions differ; adjust destination_count.
0 a61af66fc99e Initial load duke parents: diff changeset	721 destination_count += 1;
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	722 // Data from cur_region will be copied to the start of dest_region_2.
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	723 _region_data[dest_region_2].set_source_region(cur_region);
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	724 } else if (region_offset(dest_addr) == 0) {
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	725 // Data from cur_region will be copied to the start of the destination
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	726 // region.
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	727 _region_data[dest_region_1].set_source_region(cur_region);
0 a61af66fc99e Initial load duke parents: diff changeset	728 }
a61af66fc99e Initial load duke parents: diff changeset	729
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	730 _region_data[cur_region].set_destination_count(destination_count);
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	731 _region_data[cur_region].set_data_location(region_to_addr(cur_region));
0 a61af66fc99e Initial load duke parents: diff changeset	732 dest_addr += words;
a61af66fc99e Initial load duke parents: diff changeset	733 }
a61af66fc99e Initial load duke parents: diff changeset	734
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	735 ++cur_region;
0 a61af66fc99e Initial load duke parents: diff changeset	736 }
a61af66fc99e Initial load duke parents: diff changeset	737
a61af66fc99e Initial load duke parents: diff changeset	738 *target_next = dest_addr;
a61af66fc99e Initial load duke parents: diff changeset	739 return true;
a61af66fc99e Initial load duke parents: diff changeset	740 }
a61af66fc99e Initial load duke parents: diff changeset	741
a61af66fc99e Initial load duke parents: diff changeset	742 HeapWord* ParallelCompactData::calc_new_pointer(HeapWord* addr) {
a61af66fc99e Initial load duke parents: diff changeset	743 assert(addr != NULL, "Should detect NULL oop earlier");
10369 5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	744 assert(PSParallelCompact::gc_heap()->is_in(addr), "not in heap");
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	745 assert(PSParallelCompact::mark_bitmap()->is_marked(addr), "not marked");
0 a61af66fc99e Initial load duke parents: diff changeset	746
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	747 // Region covering the object.
10369 5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	748 RegionData* const region_ptr = addr_to_region_ptr(addr);
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	749 HeapWord* result = region_ptr->destination();
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	750
10369 5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	751 // If the entire Region is live, the new location is region->destination + the
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	752 // offset of the object within in the Region.
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	753
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	754 // Run some performance tests to determine if this special case pays off. It
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	755 // is worth it for pointers into the dense prefix. If the optimization to
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	756 // avoid pointer updates in regions that only point to the dense prefix is
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	757 // ever implemented, this should be revisited.
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	758 if (region_ptr->data_size() == RegionSize) {
10369 5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	759 result += region_offset(addr);
0 a61af66fc99e Initial load duke parents: diff changeset	760 return result;
a61af66fc99e Initial load duke parents: diff changeset	761 }
a61af66fc99e Initial load duke parents: diff changeset	762
10369 5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	763 // Otherwise, the new location is region->destination + block offset + the
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	764 // number of live words in the Block that are (a) to the left of addr and (b)
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	765 // due to objects that start in the Block.
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	766
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	767 // Fill in the block table if necessary. This is unsynchronized, so multiple
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	768 // threads may fill the block table for a region (harmless, since it is
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	769 // idempotent).
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	770 if (!region_ptr->blocks_filled()) {
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	771 PSParallelCompact::fill_blocks(addr_to_region_idx(addr));
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	772 region_ptr->set_blocks_filled();
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	773 }
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	774
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	775 HeapWord* const search_start = block_align_down(addr);
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	776 const size_t block_offset = addr_to_block_ptr(addr)->offset();
0 a61af66fc99e Initial load duke parents: diff changeset	777
a61af66fc99e Initial load duke parents: diff changeset	778 const ParMarkBitMap* bitmap = PSParallelCompact::mark_bitmap();
10369 5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	779 const size_t live = bitmap->live_words_in_range(search_start, oop(addr));
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	780 result += block_offset + live;
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	781 DEBUG_ONLY(PSParallelCompact::check_new_location(addr, result));
0 a61af66fc99e Initial load duke parents: diff changeset	782 return result;
a61af66fc99e Initial load duke parents: diff changeset	783 }
a61af66fc99e Initial load duke parents: diff changeset	784
10369 5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	785 #ifdef ASSERT
0 a61af66fc99e Initial load duke parents: diff changeset	786 void ParallelCompactData::verify_clear(const PSVirtualSpace* vspace)
a61af66fc99e Initial load duke parents: diff changeset	787 {
a61af66fc99e Initial load duke parents: diff changeset	788 const size_t* const beg = (const size_t*)vspace->committed_low_addr();
a61af66fc99e Initial load duke parents: diff changeset	789 const size_t* const end = (const size_t*)vspace->committed_high_addr();
a61af66fc99e Initial load duke parents: diff changeset	790 for (const size_t* p = beg; p < end; ++p) {
a61af66fc99e Initial load duke parents: diff changeset	791 assert(*p == 0, "not zero");
a61af66fc99e Initial load duke parents: diff changeset	792 }
a61af66fc99e Initial load duke parents: diff changeset	793 }
a61af66fc99e Initial load duke parents: diff changeset	794
a61af66fc99e Initial load duke parents: diff changeset	795 void ParallelCompactData::verify_clear()
a61af66fc99e Initial load duke parents: diff changeset	796 {
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	797 verify_clear(_region_vspace);
10369 5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	798 verify_clear(_block_vspace);
0 a61af66fc99e Initial load duke parents: diff changeset	799 }
a61af66fc99e Initial load duke parents: diff changeset	800 #endif // #ifdef ASSERT
a61af66fc99e Initial load duke parents: diff changeset	801
a61af66fc99e Initial load duke parents: diff changeset	802 elapsedTimer PSParallelCompact::_accumulated_time;
a61af66fc99e Initial load duke parents: diff changeset	803 unsigned int PSParallelCompact::_total_invocations = 0;
a61af66fc99e Initial load duke parents: diff changeset	804 unsigned int PSParallelCompact::_maximum_compaction_gc_num = 0;
a61af66fc99e Initial load duke parents: diff changeset	805 jlong PSParallelCompact::_time_of_last_gc = 0;
a61af66fc99e Initial load duke parents: diff changeset	806 CollectorCounters* PSParallelCompact::_counters = NULL;
a61af66fc99e Initial load duke parents: diff changeset	807 ParMarkBitMap PSParallelCompact::_mark_bitmap;
a61af66fc99e Initial load duke parents: diff changeset	808 ParallelCompactData PSParallelCompact::_summary_data;
a61af66fc99e Initial load duke parents: diff changeset	809
a61af66fc99e Initial load duke parents: diff changeset	810 PSParallelCompact::IsAliveClosure PSParallelCompact::_is_alive_closure;
113 ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 79 diff changeset	811
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 79 diff changeset	812 bool PSParallelCompact::IsAliveClosure::do_object_b(oop p) { return mark_bitmap()->is_marked(p); }
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 79 diff changeset	813
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 79 diff changeset	814 void PSParallelCompact::KeepAliveClosure::do_oop(oop* p) { PSParallelCompact::KeepAliveClosure::do_oop_work(p); }
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 79 diff changeset	815 void PSParallelCompact::KeepAliveClosure::do_oop(narrowOop* p) { PSParallelCompact::KeepAliveClosure::do_oop_work(p); }
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 79 diff changeset	816
10179 a08c80e9e1e5 8012687: Remove unused is_root checks and closures stefank parents: 9076 diff changeset	817 PSParallelCompact::AdjustPointerClosure PSParallelCompact::_adjust_pointer_closure;
6725 da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	818 PSParallelCompact::AdjustKlassClosure PSParallelCompact::_adjust_klass_closure;
0 a61af66fc99e Initial load duke parents: diff changeset	819
10179 a08c80e9e1e5 8012687: Remove unused is_root checks and closures stefank parents: 9076 diff changeset	820 void PSParallelCompact::AdjustPointerClosure::do_oop(oop* p) { adjust_pointer(p); }
a08c80e9e1e5 8012687: Remove unused is_root checks and closures stefank parents: 9076 diff changeset	821 void PSParallelCompact::AdjustPointerClosure::do_oop(narrowOop* p) { adjust_pointer(p); }
113 ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 79 diff changeset	822
1311 2a1472c30599 4396719: Mark Sweep stack overflow on deeply nested Object arrays jcoomes parents: 997 diff changeset	823 void PSParallelCompact::FollowStackClosure::do_void() { _compaction_manager->follow_marking_stacks(); }
113 ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 79 diff changeset	824
6725 da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	825 void PSParallelCompact::MarkAndPushClosure::do_oop(oop* p) {
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	826 mark_and_push(_compaction_manager, p);
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	827 }
113 ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 79 diff changeset	828 void PSParallelCompact::MarkAndPushClosure::do_oop(narrowOop* p) { mark_and_push(_compaction_manager, p); }
0 a61af66fc99e Initial load duke parents: diff changeset	829
6725 da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	830 void PSParallelCompact::FollowKlassClosure::do_klass(Klass* klass) {
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	831 klass->oops_do(_mark_and_push_closure);
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	832 }
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	833 void PSParallelCompact::AdjustKlassClosure::do_klass(Klass* klass) {
10179 a08c80e9e1e5 8012687: Remove unused is_root checks and closures stefank parents: 9076 diff changeset	834 klass->oops_do(&PSParallelCompact::_adjust_pointer_closure);
6725 da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	835 }
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	836
0 a61af66fc99e Initial load duke parents: diff changeset	837 void PSParallelCompact::post_initialize() {
a61af66fc99e Initial load duke parents: diff changeset	838 ParallelScavengeHeap* heap = gc_heap();
a61af66fc99e Initial load duke parents: diff changeset	839 assert(heap->kind() == CollectedHeap::ParallelScavengeHeap, "Sanity");
a61af66fc99e Initial load duke parents: diff changeset	840
a61af66fc99e Initial load duke parents: diff changeset	841 MemRegion mr = heap->reserved_region();
2369 92da084fefc9 6668573: CMS: reference processing crash if ParallelCMSThreads > ParallelGCThreads ysr parents: 2177 diff changeset	842 _ref_processor =
92da084fefc9 6668573: CMS: reference processing crash if ParallelCMSThreads > ParallelGCThreads ysr parents: 2177 diff changeset	843 new ReferenceProcessor(mr, // span
92da084fefc9 6668573: CMS: reference processing crash if ParallelCMSThreads > ParallelGCThreads ysr parents: 2177 diff changeset	844 ParallelRefProcEnabled && (ParallelGCThreads > 1), // mt processing
92da084fefc9 6668573: CMS: reference processing crash if ParallelCMSThreads > ParallelGCThreads ysr parents: 2177 diff changeset	845 (int) ParallelGCThreads, // mt processing degree
92da084fefc9 6668573: CMS: reference processing crash if ParallelCMSThreads > ParallelGCThreads ysr parents: 2177 diff changeset	846 true, // mt discovery
92da084fefc9 6668573: CMS: reference processing crash if ParallelCMSThreads > ParallelGCThreads ysr parents: 2177 diff changeset	847 (int) ParallelGCThreads, // mt discovery degree
92da084fefc9 6668573: CMS: reference processing crash if ParallelCMSThreads > ParallelGCThreads ysr parents: 2177 diff changeset	848 true, // atomic_discovery
92da084fefc9 6668573: CMS: reference processing crash if ParallelCMSThreads > ParallelGCThreads ysr parents: 2177 diff changeset	849 &_is_alive_closure, // non-header is alive closure
92da084fefc9 6668573: CMS: reference processing crash if ParallelCMSThreads > ParallelGCThreads ysr parents: 2177 diff changeset	850 false); // write barrier for next field updates
0 a61af66fc99e Initial load duke parents: diff changeset	851 _counters = new CollectorCounters("PSParallelCompact", 1);
a61af66fc99e Initial load duke parents: diff changeset	852
a61af66fc99e Initial load duke parents: diff changeset	853 // Initialize static fields in ParCompactionManager.
a61af66fc99e Initial load duke parents: diff changeset	854 ParCompactionManager::initialize(mark_bitmap());
a61af66fc99e Initial load duke parents: diff changeset	855 }
a61af66fc99e Initial load duke parents: diff changeset	856
a61af66fc99e Initial load duke parents: diff changeset	857 bool PSParallelCompact::initialize() {
a61af66fc99e Initial load duke parents: diff changeset	858 ParallelScavengeHeap* heap = gc_heap();
a61af66fc99e Initial load duke parents: diff changeset	859 assert(heap->kind() == CollectedHeap::ParallelScavengeHeap, "Sanity");
a61af66fc99e Initial load duke parents: diff changeset	860 MemRegion mr = heap->reserved_region();
a61af66fc99e Initial load duke parents: diff changeset	861
a61af66fc99e Initial load duke parents: diff changeset	862 // Was the old gen get allocated successfully?
a61af66fc99e Initial load duke parents: diff changeset	863 if (!heap->old_gen()->is_allocated()) {
a61af66fc99e Initial load duke parents: diff changeset	864 return false;
a61af66fc99e Initial load duke parents: diff changeset	865 }
a61af66fc99e Initial load duke parents: diff changeset	866
a61af66fc99e Initial load duke parents: diff changeset	867 initialize_space_info();
a61af66fc99e Initial load duke parents: diff changeset	868 initialize_dead_wood_limiter();
a61af66fc99e Initial load duke parents: diff changeset	869
a61af66fc99e Initial load duke parents: diff changeset	870 if (!_mark_bitmap.initialize(mr)) {
10329 10f759898d40 7186737: Unable to allocate bit maps or card tables for parallel gc for the requested heap tamao parents: 10327 diff changeset	871 vm_shutdown_during_initialization(
10f759898d40 7186737: Unable to allocate bit maps or card tables for parallel gc for the requested heap tamao parents: 10327 diff changeset	872 err_msg("Unable to allocate " SIZE_FORMAT "KB bitmaps for parallel "
10f759898d40 7186737: Unable to allocate bit maps or card tables for parallel gc for the requested heap tamao parents: 10327 diff changeset	873 "garbage collection for the requested " SIZE_FORMAT "KB heap.",
10f759898d40 7186737: Unable to allocate bit maps or card tables for parallel gc for the requested heap tamao parents: 10327 diff changeset	874 _mark_bitmap.reserved_byte_size()/K, mr.byte_size()/K));
0 a61af66fc99e Initial load duke parents: diff changeset	875 return false;
a61af66fc99e Initial load duke parents: diff changeset	876 }
a61af66fc99e Initial load duke parents: diff changeset	877
a61af66fc99e Initial load duke parents: diff changeset	878 if (!_summary_data.initialize(mr)) {
10329 10f759898d40 7186737: Unable to allocate bit maps or card tables for parallel gc for the requested heap tamao parents: 10327 diff changeset	879 vm_shutdown_during_initialization(
10f759898d40 7186737: Unable to allocate bit maps or card tables for parallel gc for the requested heap tamao parents: 10327 diff changeset	880 err_msg("Unable to allocate " SIZE_FORMAT "KB card tables for parallel "
10f759898d40 7186737: Unable to allocate bit maps or card tables for parallel gc for the requested heap tamao parents: 10327 diff changeset	881 "garbage collection for the requested " SIZE_FORMAT "KB heap.",
10f759898d40 7186737: Unable to allocate bit maps or card tables for parallel gc for the requested heap tamao parents: 10327 diff changeset	882 _summary_data.reserved_byte_size()/K, mr.byte_size()/K));
0 a61af66fc99e Initial load duke parents: diff changeset	883 return false;
a61af66fc99e Initial load duke parents: diff changeset	884 }
a61af66fc99e Initial load duke parents: diff changeset	885
a61af66fc99e Initial load duke parents: diff changeset	886 return true;
a61af66fc99e Initial load duke parents: diff changeset	887 }
a61af66fc99e Initial load duke parents: diff changeset	888
a61af66fc99e Initial load duke parents: diff changeset	889 void PSParallelCompact::initialize_space_info()
a61af66fc99e Initial load duke parents: diff changeset	890 {
a61af66fc99e Initial load duke parents: diff changeset	891 memset(&_space_info, 0, sizeof(_space_info));
a61af66fc99e Initial load duke parents: diff changeset	892
a61af66fc99e Initial load duke parents: diff changeset	893 ParallelScavengeHeap* heap = gc_heap();
a61af66fc99e Initial load duke parents: diff changeset	894 PSYoungGen* young_gen = heap->young_gen();
6725 da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	895
0 a61af66fc99e Initial load duke parents: diff changeset	896 _space_info[old_space_id].set_space(heap->old_gen()->object_space());
a61af66fc99e Initial load duke parents: diff changeset	897 _space_info[eden_space_id].set_space(young_gen->eden_space());
a61af66fc99e Initial load duke parents: diff changeset	898 _space_info[from_space_id].set_space(young_gen->from_space());
a61af66fc99e Initial load duke parents: diff changeset	899 _space_info[to_space_id].set_space(young_gen->to_space());
a61af66fc99e Initial load duke parents: diff changeset	900
a61af66fc99e Initial load duke parents: diff changeset	901 _space_info[old_space_id].set_start_array(heap->old_gen()->start_array());
a61af66fc99e Initial load duke parents: diff changeset	902 }
a61af66fc99e Initial load duke parents: diff changeset	903
a61af66fc99e Initial load duke parents: diff changeset	904 void PSParallelCompact::initialize_dead_wood_limiter()
a61af66fc99e Initial load duke parents: diff changeset	905 {
a61af66fc99e Initial load duke parents: diff changeset	906 const size_t max = 100;
a61af66fc99e Initial load duke parents: diff changeset	907 _dwl_mean = double(MIN2(ParallelOldDeadWoodLimiterMean, max)) / 100.0;
a61af66fc99e Initial load duke parents: diff changeset	908 _dwl_std_dev = double(MIN2(ParallelOldDeadWoodLimiterStdDev, max)) / 100.0;
a61af66fc99e Initial load duke parents: diff changeset	909 _dwl_first_term = 1.0 / (sqrt(2.0 * M_PI) * _dwl_std_dev);
a61af66fc99e Initial load duke parents: diff changeset	910 DEBUG_ONLY(_dwl_initialized = true;)
a61af66fc99e Initial load duke parents: diff changeset	911 _dwl_adjustment = normal_distribution(1.0);
a61af66fc99e Initial load duke parents: diff changeset	912 }
a61af66fc99e Initial load duke parents: diff changeset	913
a61af66fc99e Initial load duke parents: diff changeset	914 // Simple class for storing info about the heap at the start of GC, to be used
a61af66fc99e Initial load duke parents: diff changeset	915 // after GC for comparison/printing.
a61af66fc99e Initial load duke parents: diff changeset	916 class PreGCValues {
a61af66fc99e Initial load duke parents: diff changeset	917 public:
a61af66fc99e Initial load duke parents: diff changeset	918 PreGCValues() { }
a61af66fc99e Initial load duke parents: diff changeset	919 PreGCValues(ParallelScavengeHeap* heap) { fill(heap); }
a61af66fc99e Initial load duke parents: diff changeset	920
a61af66fc99e Initial load duke parents: diff changeset	921 void fill(ParallelScavengeHeap* heap) {
a61af66fc99e Initial load duke parents: diff changeset	922 _heap_used = heap->used();
a61af66fc99e Initial load duke parents: diff changeset	923 _young_gen_used = heap->young_gen()->used_in_bytes();
a61af66fc99e Initial load duke parents: diff changeset	924 _old_gen_used = heap->old_gen()->used_in_bytes();
10183 868d87ed63c8 8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions jmasa parents: 10179 diff changeset	925 _metadata_used = MetaspaceAux::allocated_used_bytes();
0 a61af66fc99e Initial load duke parents: diff changeset	926 };
a61af66fc99e Initial load duke parents: diff changeset	927
a61af66fc99e Initial load duke parents: diff changeset	928 size_t heap_used() const { return _heap_used; }
a61af66fc99e Initial load duke parents: diff changeset	929 size_t young_gen_used() const { return _young_gen_used; }
a61af66fc99e Initial load duke parents: diff changeset	930 size_t old_gen_used() const { return _old_gen_used; }
6725 da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	931 size_t metadata_used() const { return _metadata_used; }
0 a61af66fc99e Initial load duke parents: diff changeset	932
a61af66fc99e Initial load duke parents: diff changeset	933 private:
a61af66fc99e Initial load duke parents: diff changeset	934 size_t _heap_used;
a61af66fc99e Initial load duke parents: diff changeset	935 size_t _young_gen_used;
a61af66fc99e Initial load duke parents: diff changeset	936 size_t _old_gen_used;
6725 da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	937 size_t _metadata_used;
0 a61af66fc99e Initial load duke parents: diff changeset	938 };
a61af66fc99e Initial load duke parents: diff changeset	939
a61af66fc99e Initial load duke parents: diff changeset	940 void
a61af66fc99e Initial load duke parents: diff changeset	941 PSParallelCompact::clear_data_covering_space(SpaceId id)
a61af66fc99e Initial load duke parents: diff changeset	942 {
a61af66fc99e Initial load duke parents: diff changeset	943 // At this point, top is the value before GC, new_top() is the value that will
a61af66fc99e Initial load duke parents: diff changeset	944 // be set at the end of GC. The marking bitmap is cleared to top; nothing
a61af66fc99e Initial load duke parents: diff changeset	945 // should be marked above top. The summary data is cleared to the larger of
a61af66fc99e Initial load duke parents: diff changeset	946 // top & new_top.
a61af66fc99e Initial load duke parents: diff changeset	947 MutableSpace* const space = _space_info[id].space();
a61af66fc99e Initial load duke parents: diff changeset	948 HeapWord* const bot = space->bottom();
a61af66fc99e Initial load duke parents: diff changeset	949 HeapWord* const top = space->top();
a61af66fc99e Initial load duke parents: diff changeset	950 HeapWord* const max_top = MAX2(top, _space_info[id].new_top());
a61af66fc99e Initial load duke parents: diff changeset	951
a61af66fc99e Initial load duke parents: diff changeset	952 const idx_t beg_bit = _mark_bitmap.addr_to_bit(bot);
a61af66fc99e Initial load duke parents: diff changeset	953 const idx_t end_bit = BitMap::word_align_up(_mark_bitmap.addr_to_bit(top));
a61af66fc99e Initial load duke parents: diff changeset	954 _mark_bitmap.clear_range(beg_bit, end_bit);
a61af66fc99e Initial load duke parents: diff changeset	955
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	956 const size_t beg_region = _summary_data.addr_to_region_idx(bot);
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	957 const size_t end_region =
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	958 _summary_data.addr_to_region_idx(_summary_data.region_align_up(max_top));
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	959 _summary_data.clear_range(beg_region, end_region);
482 7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	960
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	961 // Clear the data used to 'split' regions.
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	962 SplitInfo& split_info = _space_info[id].split_info();
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	963 if (split_info.is_valid()) {
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	964 split_info.clear();
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	965 }
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	966 DEBUG_ONLY(split_info.verify_clear();)
0 a61af66fc99e Initial load duke parents: diff changeset	967 }
a61af66fc99e Initial load duke parents: diff changeset	968
a61af66fc99e Initial load duke parents: diff changeset	969 void PSParallelCompact::pre_compact(PreGCValues* pre_gc_values)
a61af66fc99e Initial load duke parents: diff changeset	970 {
a61af66fc99e Initial load duke parents: diff changeset	971 // Update the from & to space pointers in space_info, since they are swapped
a61af66fc99e Initial load duke parents: diff changeset	972 // at each young gen gc. Do the update unconditionally (even though a
a61af66fc99e Initial load duke parents: diff changeset	973 // promotion failure does not swap spaces) because an unknown number of minor
a61af66fc99e Initial load duke parents: diff changeset	974 // collections will have swapped the spaces an unknown number of times.
a61af66fc99e Initial load duke parents: diff changeset	975 TraceTime tm("pre compact", print_phases(), true, gclog_or_tty);
a61af66fc99e Initial load duke parents: diff changeset	976 ParallelScavengeHeap* heap = gc_heap();
a61af66fc99e Initial load duke parents: diff changeset	977 _space_info[from_space_id].set_space(heap->young_gen()->from_space());
a61af66fc99e Initial load duke parents: diff changeset	978 _space_info[to_space_id].set_space(heap->young_gen()->to_space());
a61af66fc99e Initial load duke parents: diff changeset	979
a61af66fc99e Initial load duke parents: diff changeset	980 pre_gc_values->fill(heap);
a61af66fc99e Initial load duke parents: diff changeset	981
a61af66fc99e Initial load duke parents: diff changeset	982 DEBUG_ONLY(add_obj_count = add_obj_size = 0;)
a61af66fc99e Initial load duke parents: diff changeset	983 DEBUG_ONLY(mark_bitmap_count = mark_bitmap_size = 0;)
a61af66fc99e Initial load duke parents: diff changeset	984
a61af66fc99e Initial load duke parents: diff changeset	985 // Increment the invocation count
139 c0492d52d55b 6539517: CR 6186200 should be extended to perm gen allocation to prevent spurious OOM's from perm gen apetrusenko parents: 0 diff changeset	986 heap->increment_total_collections(true);
0 a61af66fc99e Initial load duke parents: diff changeset	987
a61af66fc99e Initial load duke parents: diff changeset	988 // We need to track unique mark sweep invocations as well.
a61af66fc99e Initial load duke parents: diff changeset	989 _total_invocations++;
a61af66fc99e Initial load duke parents: diff changeset	990
4872 aa3d708d67c4 7141200: log some interesting information in ring buffers for crashes never parents: 4712 diff changeset	991 heap->print_heap_before_gc();
0 a61af66fc99e Initial load duke parents: diff changeset	992
a61af66fc99e Initial load duke parents: diff changeset	993 // Fill in TLABs
a61af66fc99e Initial load duke parents: diff changeset	994 heap->accumulate_statistics_all_tlabs();
a61af66fc99e Initial load duke parents: diff changeset	995 heap->ensure_parsability(true); // retire TLABs
a61af66fc99e Initial load duke parents: diff changeset	996
a61af66fc99e Initial load duke parents: diff changeset	997 if (VerifyBeforeGC && heap->total_collections() >= VerifyGCStartAt) {
a61af66fc99e Initial load duke parents: diff changeset	998 HandleMark hm; // Discard invalid handles created during verification
10186 b06ac540229e 8013132: Add a flag to turn off the output of the verbose verification code stefank parents: 10183 diff changeset	999 Universe::verify(" VerifyBeforeGC:");
0 a61af66fc99e Initial load duke parents: diff changeset	1000 }
a61af66fc99e Initial load duke parents: diff changeset	1001
a61af66fc99e Initial load duke parents: diff changeset	1002 // Verify object start arrays
a61af66fc99e Initial load duke parents: diff changeset	1003 if (VerifyObjectStartArray &&
a61af66fc99e Initial load duke parents: diff changeset	1004 VerifyBeforeGC) {
a61af66fc99e Initial load duke parents: diff changeset	1005 heap->old_gen()->verify_object_start_array();
a61af66fc99e Initial load duke parents: diff changeset	1006 }
a61af66fc99e Initial load duke parents: diff changeset	1007
a61af66fc99e Initial load duke parents: diff changeset	1008 DEBUG_ONLY(mark_bitmap()->verify_clear();)
a61af66fc99e Initial load duke parents: diff changeset	1009 DEBUG_ONLY(summary_data().verify_clear();)
210 05712c37c828 6676016: ParallelOldGC leaks memory jcoomes parents: 142 diff changeset	1010
05712c37c828 6676016: ParallelOldGC leaks memory jcoomes parents: 142 diff changeset	1011 // Have worker threads release resources the next time they run a task.
05712c37c828 6676016: ParallelOldGC leaks memory jcoomes parents: 142 diff changeset	1012 gc_task_manager()->release_all_resources();
0 a61af66fc99e Initial load duke parents: diff changeset	1013 }
a61af66fc99e Initial load duke parents: diff changeset	1014
a61af66fc99e Initial load duke parents: diff changeset	1015 void PSParallelCompact::post_compact()
a61af66fc99e Initial load duke parents: diff changeset	1016 {
a61af66fc99e Initial load duke parents: diff changeset	1017 TraceTime tm("post compact", print_phases(), true, gclog_or_tty);
a61af66fc99e Initial load duke parents: diff changeset	1018
6725 da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	1019 for (unsigned int id = old_space_id; id < last_space_id; ++id) {
482 7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1020 // Clear the marking bitmap, summary data and split info.
0 a61af66fc99e Initial load duke parents: diff changeset	1021 clear_data_covering_space(SpaceId(id));
482 7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1022 // Update top(). Must be done after clearing the bitmap and summary data.
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1023 _space_info[id].publish_new_top();
0 a61af66fc99e Initial load duke parents: diff changeset	1024 }
a61af66fc99e Initial load duke parents: diff changeset	1025
a61af66fc99e Initial load duke parents: diff changeset	1026 MutableSpace* const eden_space = _space_info[eden_space_id].space();
a61af66fc99e Initial load duke parents: diff changeset	1027 MutableSpace* const from_space = _space_info[from_space_id].space();
a61af66fc99e Initial load duke parents: diff changeset	1028 MutableSpace* const to_space = _space_info[to_space_id].space();
a61af66fc99e Initial load duke parents: diff changeset	1029
a61af66fc99e Initial load duke parents: diff changeset	1030 ParallelScavengeHeap* heap = gc_heap();
a61af66fc99e Initial load duke parents: diff changeset	1031 bool eden_empty = eden_space->is_empty();
a61af66fc99e Initial load duke parents: diff changeset	1032 if (!eden_empty) {
a61af66fc99e Initial load duke parents: diff changeset	1033 eden_empty = absorb_live_data_from_eden(heap->size_policy(),
a61af66fc99e Initial load duke parents: diff changeset	1034 heap->young_gen(), heap->old_gen());
a61af66fc99e Initial load duke parents: diff changeset	1035 }
a61af66fc99e Initial load duke parents: diff changeset	1036
a61af66fc99e Initial load duke parents: diff changeset	1037 // Update heap occupancy information which is used as input to the soft ref
a61af66fc99e Initial load duke parents: diff changeset	1038 // clearing policy at the next gc.
a61af66fc99e Initial load duke parents: diff changeset	1039 Universe::update_heap_info_at_gc();
a61af66fc99e Initial load duke parents: diff changeset	1040
a61af66fc99e Initial load duke parents: diff changeset	1041 bool young_gen_empty = eden_empty && from_space->is_empty() &&
a61af66fc99e Initial load duke parents: diff changeset	1042 to_space->is_empty();
a61af66fc99e Initial load duke parents: diff changeset	1043
a61af66fc99e Initial load duke parents: diff changeset	1044 BarrierSet* bs = heap->barrier_set();
a61af66fc99e Initial load duke parents: diff changeset	1045 if (bs->is_a(BarrierSet::ModRef)) {
a61af66fc99e Initial load duke parents: diff changeset	1046 ModRefBarrierSet* modBS = (ModRefBarrierSet*)bs;
a61af66fc99e Initial load duke parents: diff changeset	1047 MemRegion old_mr = heap->old_gen()->reserved();
a61af66fc99e Initial load duke parents: diff changeset	1048
a61af66fc99e Initial load duke parents: diff changeset	1049 if (young_gen_empty) {
6725 da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	1050 modBS->clear(MemRegion(old_mr.start(), old_mr.end()));
0 a61af66fc99e Initial load duke parents: diff changeset	1051 } else {
6725 da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	1052 modBS->invalidate(MemRegion(old_mr.start(), old_mr.end()));
0 a61af66fc99e Initial load duke parents: diff changeset	1053 }
a61af66fc99e Initial load duke parents: diff changeset	1054 }
a61af66fc99e Initial load duke parents: diff changeset	1055
6725 da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	1056 // Delete metaspaces for unloaded class loaders and clean up loader_data graph
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	1057 ClassLoaderDataGraph::purge();
10183 868d87ed63c8 8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions jmasa parents: 10179 diff changeset	1058 MetaspaceAux::verify_metrics();
6725 da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	1059
0 a61af66fc99e Initial load duke parents: diff changeset	1060 Threads::gc_epilogue();
a61af66fc99e Initial load duke parents: diff changeset	1061 CodeCache::gc_epilogue();
2147 9afee0b9fc1d 7012505: BreakpointWithFullGC.sh fails with Internal Error (src/share/vm/oops/methodOop.cpp:220) kamg parents: 1972 diff changeset	1062 JvmtiExport::gc_epilogue();
0 a61af66fc99e Initial load duke parents: diff changeset	1063
a61af66fc99e Initial load duke parents: diff changeset	1064 COMPILER2_PRESENT(DerivedPointerTable::update_pointers());
a61af66fc99e Initial load duke parents: diff changeset	1065
a61af66fc99e Initial load duke parents: diff changeset	1066 ref_processor()->enqueue_discovered_references(NULL);
a61af66fc99e Initial load duke parents: diff changeset	1067
263 12eea04c8b06 6672698: mangle_unused_area() should not remangle the entire heap at each collection. jmasa parents: 210 diff changeset	1068 if (ZapUnusedHeapArea) {
12eea04c8b06 6672698: mangle_unused_area() should not remangle the entire heap at each collection. jmasa parents: 210 diff changeset	1069 heap->gen_mangle_unused_area();
12eea04c8b06 6672698: mangle_unused_area() should not remangle the entire heap at each collection. jmasa parents: 210 diff changeset	1070 }
12eea04c8b06 6672698: mangle_unused_area() should not remangle the entire heap at each collection. jmasa parents: 210 diff changeset	1071
0 a61af66fc99e Initial load duke parents: diff changeset	1072 // Update time of last GC
a61af66fc99e Initial load duke parents: diff changeset	1073 reset_millis_since_last_gc();
a61af66fc99e Initial load duke parents: diff changeset	1074 }
a61af66fc99e Initial load duke parents: diff changeset	1075
a61af66fc99e Initial load duke parents: diff changeset	1076 HeapWord*
a61af66fc99e Initial load duke parents: diff changeset	1077 PSParallelCompact::compute_dense_prefix_via_density(const SpaceId id,
a61af66fc99e Initial load duke parents: diff changeset	1078 bool maximum_compaction)
a61af66fc99e Initial load duke parents: diff changeset	1079 {
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1080 const size_t region_size = ParallelCompactData::RegionSize;
0 a61af66fc99e Initial load duke parents: diff changeset	1081 const ParallelCompactData& sd = summary_data();
a61af66fc99e Initial load duke parents: diff changeset	1082
a61af66fc99e Initial load duke parents: diff changeset	1083 const MutableSpace* const space = _space_info[id].space();
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1084 HeapWord* const top_aligned_up = sd.region_align_up(space->top());
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1085 const RegionData* const beg_cp = sd.addr_to_region_ptr(space->bottom());
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1086 const RegionData* const end_cp = sd.addr_to_region_ptr(top_aligned_up);
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1087
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1088 // Skip full regions at the beginning of the space--they are necessarily part
0 a61af66fc99e Initial load duke parents: diff changeset	1089 // of the dense prefix.
a61af66fc99e Initial load duke parents: diff changeset	1090 size_t full_count = 0;
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1091 const RegionData* cp;
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1092 for (cp = beg_cp; cp < end_cp && cp->data_size() == region_size; ++cp) {
0 a61af66fc99e Initial load duke parents: diff changeset	1093 ++full_count;
a61af66fc99e Initial load duke parents: diff changeset	1094 }
a61af66fc99e Initial load duke parents: diff changeset	1095
a61af66fc99e Initial load duke parents: diff changeset	1096 assert(total_invocations() >= _maximum_compaction_gc_num, "sanity");
a61af66fc99e Initial load duke parents: diff changeset	1097 const size_t gcs_since_max = total_invocations() - _maximum_compaction_gc_num;
a61af66fc99e Initial load duke parents: diff changeset	1098 const bool interval_ended = gcs_since_max > HeapMaximumCompactionInterval;
a61af66fc99e Initial load duke parents: diff changeset	1099 if (maximum_compaction \|\| cp == end_cp \|\| interval_ended) {
a61af66fc99e Initial load duke parents: diff changeset	1100 _maximum_compaction_gc_num = total_invocations();
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1101 return sd.region_to_addr(cp);
0 a61af66fc99e Initial load duke parents: diff changeset	1102 }
a61af66fc99e Initial load duke parents: diff changeset	1103
a61af66fc99e Initial load duke parents: diff changeset	1104 HeapWord* const new_top = _space_info[id].new_top();
a61af66fc99e Initial load duke parents: diff changeset	1105 const size_t space_live = pointer_delta(new_top, space->bottom());
a61af66fc99e Initial load duke parents: diff changeset	1106 const size_t space_used = space->used_in_words();
a61af66fc99e Initial load duke parents: diff changeset	1107 const size_t space_capacity = space->capacity_in_words();
a61af66fc99e Initial load duke parents: diff changeset	1108
a61af66fc99e Initial load duke parents: diff changeset	1109 const double cur_density = double(space_live) / space_capacity;
a61af66fc99e Initial load duke parents: diff changeset	1110 const double deadwood_density =
a61af66fc99e Initial load duke parents: diff changeset	1111 (1.0 - cur_density) * (1.0 - cur_density) * cur_density * cur_density;
a61af66fc99e Initial load duke parents: diff changeset	1112 const size_t deadwood_goal = size_t(space_capacity * deadwood_density);
a61af66fc99e Initial load duke parents: diff changeset	1113
a61af66fc99e Initial load duke parents: diff changeset	1114 if (TraceParallelOldGCDensePrefix) {
a61af66fc99e Initial load duke parents: diff changeset	1115 tty->print_cr("cur_dens=%5.3f dw_dens=%5.3f dw_goal=" SIZE_FORMAT,
a61af66fc99e Initial load duke parents: diff changeset	1116 cur_density, deadwood_density, deadwood_goal);
a61af66fc99e Initial load duke parents: diff changeset	1117 tty->print_cr("space_live=" SIZE_FORMAT " " "space_used=" SIZE_FORMAT " "
a61af66fc99e Initial load duke parents: diff changeset	1118 "space_cap=" SIZE_FORMAT,
a61af66fc99e Initial load duke parents: diff changeset	1119 space_live, space_used,
a61af66fc99e Initial load duke parents: diff changeset	1120 space_capacity);
a61af66fc99e Initial load duke parents: diff changeset	1121 }
a61af66fc99e Initial load duke parents: diff changeset	1122
a61af66fc99e Initial load duke parents: diff changeset	1123 // XXX - Use binary search?
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1124 HeapWord* dense_prefix = sd.region_to_addr(cp);
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1125 const RegionData* full_cp = cp;
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1126 const RegionData* const top_cp = sd.addr_to_region_ptr(space->top() - 1);
0 a61af66fc99e Initial load duke parents: diff changeset	1127 while (cp < end_cp) {
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1128 HeapWord* region_destination = cp->destination();
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1129 const size_t cur_deadwood = pointer_delta(dense_prefix, region_destination);
0 a61af66fc99e Initial load duke parents: diff changeset	1130 if (TraceParallelOldGCDensePrefix && Verbose) {
264 15dd2594d08e 6718283: existing uses of _FORMAT_W() were broken by 6521491 jcoomes* parents: 263 diff changeset	1131 tty->print_cr("c#=" SIZE_FORMAT_W(4) " dst=" PTR_FORMAT " "
15dd2594d08e 6718283: existing uses of _FORMAT_W() were broken by 6521491 jcoomes* parents: 263 diff changeset	1132 "dp=" SIZE_FORMAT_W(8) " " "cdw=" SIZE_FORMAT_W(8),
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1133 sd.region(cp), region_destination,
0 a61af66fc99e Initial load duke parents: diff changeset	1134 dense_prefix, cur_deadwood);
a61af66fc99e Initial load duke parents: diff changeset	1135 }
a61af66fc99e Initial load duke parents: diff changeset	1136
a61af66fc99e Initial load duke parents: diff changeset	1137 if (cur_deadwood >= deadwood_goal) {
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1138 // Found the region that has the correct amount of deadwood to the left.
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1139 // This typically occurs after crossing a fairly sparse set of regions, so
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1140 // iterate backwards over those sparse regions, looking for the region
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1141 // that has the lowest density of live objects 'to the right.'
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1142 size_t space_to_left = sd.region(cp) * region_size;
0 a61af66fc99e Initial load duke parents: diff changeset	1143 size_t live_to_left = space_to_left - cur_deadwood;
a61af66fc99e Initial load duke parents: diff changeset	1144 size_t space_to_right = space_capacity - space_to_left;
a61af66fc99e Initial load duke parents: diff changeset	1145 size_t live_to_right = space_live - live_to_left;
a61af66fc99e Initial load duke parents: diff changeset	1146 double density_to_right = double(live_to_right) / space_to_right;
a61af66fc99e Initial load duke parents: diff changeset	1147 while (cp > full_cp) {
a61af66fc99e Initial load duke parents: diff changeset	1148 --cp;
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1149 const size_t prev_region_live_to_right = live_to_right -
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1150 cp->data_size();
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1151 const size_t prev_region_space_to_right = space_to_right + region_size;
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1152 double prev_region_density_to_right =
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1153 double(prev_region_live_to_right) / prev_region_space_to_right;
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1154 if (density_to_right <= prev_region_density_to_right) {
0 a61af66fc99e Initial load duke parents: diff changeset	1155 return dense_prefix;
a61af66fc99e Initial load duke parents: diff changeset	1156 }
a61af66fc99e Initial load duke parents: diff changeset	1157 if (TraceParallelOldGCDensePrefix && Verbose) {
264 15dd2594d08e 6718283: existing uses of _FORMAT_W() were broken by 6521491 jcoomes* parents: 263 diff changeset	1158 tty->print_cr("backing up from c=" SIZE_FORMAT_W(4) " d2r=%10.8f "
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1159 "pc_d2r=%10.8f", sd.region(cp), density_to_right,
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1160 prev_region_density_to_right);
0 a61af66fc99e Initial load duke parents: diff changeset	1161 }
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1162 dense_prefix -= region_size;
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1163 live_to_right = prev_region_live_to_right;
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1164 space_to_right = prev_region_space_to_right;
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1165 density_to_right = prev_region_density_to_right;
0 a61af66fc99e Initial load duke parents: diff changeset	1166 }
a61af66fc99e Initial load duke parents: diff changeset	1167 return dense_prefix;
a61af66fc99e Initial load duke parents: diff changeset	1168 }
a61af66fc99e Initial load duke parents: diff changeset	1169
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1170 dense_prefix += region_size;
0 a61af66fc99e Initial load duke parents: diff changeset	1171 ++cp;
a61af66fc99e Initial load duke parents: diff changeset	1172 }
a61af66fc99e Initial load duke parents: diff changeset	1173
a61af66fc99e Initial load duke parents: diff changeset	1174 return dense_prefix;
a61af66fc99e Initial load duke parents: diff changeset	1175 }
a61af66fc99e Initial load duke parents: diff changeset	1176
a61af66fc99e Initial load duke parents: diff changeset	1177 #ifndef PRODUCT
a61af66fc99e Initial load duke parents: diff changeset	1178 void PSParallelCompact::print_dense_prefix_stats(const char* const algorithm,
a61af66fc99e Initial load duke parents: diff changeset	1179 const SpaceId id,
a61af66fc99e Initial load duke parents: diff changeset	1180 const bool maximum_compaction,
a61af66fc99e Initial load duke parents: diff changeset	1181 HeapWord* const addr)
a61af66fc99e Initial load duke parents: diff changeset	1182 {
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1183 const size_t region_idx = summary_data().addr_to_region_idx(addr);
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1184 RegionData* const cp = summary_data().region(region_idx);
0 a61af66fc99e Initial load duke parents: diff changeset	1185 const MutableSpace* const space = _space_info[id].space();
a61af66fc99e Initial load duke parents: diff changeset	1186 HeapWord* const new_top = _space_info[id].new_top();
a61af66fc99e Initial load duke parents: diff changeset	1187
a61af66fc99e Initial load duke parents: diff changeset	1188 const size_t space_live = pointer_delta(new_top, space->bottom());
a61af66fc99e Initial load duke parents: diff changeset	1189 const size_t dead_to_left = pointer_delta(addr, cp->destination());
a61af66fc99e Initial load duke parents: diff changeset	1190 const size_t space_cap = space->capacity_in_words();
a61af66fc99e Initial load duke parents: diff changeset	1191 const double dead_to_left_pct = double(dead_to_left) / space_cap;
a61af66fc99e Initial load duke parents: diff changeset	1192 const size_t live_to_right = new_top - cp->destination();
a61af66fc99e Initial load duke parents: diff changeset	1193 const size_t dead_to_right = space->top() - addr - live_to_right;
a61af66fc99e Initial load duke parents: diff changeset	1194
264 15dd2594d08e 6718283: existing uses of _FORMAT_W() were broken by 6521491 jcoomes* parents: 263 diff changeset	1195 tty->print_cr("%s=" PTR_FORMAT " dpc=" SIZE_FORMAT_W(5) " "
0 a61af66fc99e Initial load duke parents: diff changeset	1196 "spl=" SIZE_FORMAT " "
a61af66fc99e Initial load duke parents: diff changeset	1197 "d2l=" SIZE_FORMAT " d2l%%=%6.4f "
a61af66fc99e Initial load duke parents: diff changeset	1198 "d2r=" SIZE_FORMAT " l2r=" SIZE_FORMAT
a61af66fc99e Initial load duke parents: diff changeset	1199 " ratio=%10.8f",
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1200 algorithm, addr, region_idx,
0 a61af66fc99e Initial load duke parents: diff changeset	1201 space_live,
a61af66fc99e Initial load duke parents: diff changeset	1202 dead_to_left, dead_to_left_pct,
a61af66fc99e Initial load duke parents: diff changeset	1203 dead_to_right, live_to_right,
a61af66fc99e Initial load duke parents: diff changeset	1204 double(dead_to_right) / live_to_right);
a61af66fc99e Initial load duke parents: diff changeset	1205 }
a61af66fc99e Initial load duke parents: diff changeset	1206 #endif // #ifndef PRODUCT
a61af66fc99e Initial load duke parents: diff changeset	1207
a61af66fc99e Initial load duke parents: diff changeset	1208 // Return a fraction indicating how much of the generation can be treated as
a61af66fc99e Initial load duke parents: diff changeset	1209 // "dead wood" (i.e., not reclaimed). The function uses a normal distribution
a61af66fc99e Initial load duke parents: diff changeset	1210 // based on the density of live objects in the generation to determine a limit,
a61af66fc99e Initial load duke parents: diff changeset	1211 // which is then adjusted so the return value is min_percent when the density is
a61af66fc99e Initial load duke parents: diff changeset	1212 // 1.
a61af66fc99e Initial load duke parents: diff changeset	1213 //
a61af66fc99e Initial load duke parents: diff changeset	1214 // The following table shows some return values for a different values of the
a61af66fc99e Initial load duke parents: diff changeset	1215 // standard deviation (ParallelOldDeadWoodLimiterStdDev); the mean is 0.5 and
a61af66fc99e Initial load duke parents: diff changeset	1216 // min_percent is 1.
a61af66fc99e Initial load duke parents: diff changeset	1217 //
a61af66fc99e Initial load duke parents: diff changeset	1218 // fraction allowed as dead wood
a61af66fc99e Initial load duke parents: diff changeset	1219 // -----------------------------------------------------------------
a61af66fc99e Initial load duke parents: diff changeset	1220 // density std_dev=70 std_dev=75 std_dev=80 std_dev=85 std_dev=90 std_dev=95
a61af66fc99e Initial load duke parents: diff changeset	1221 // ------- ---------- ---------- ---------- ---------- ---------- ----------
a61af66fc99e Initial load duke parents: diff changeset	1222 // 0.00000 0.01000000 0.01000000 0.01000000 0.01000000 0.01000000 0.01000000
a61af66fc99e Initial load duke parents: diff changeset	1223 // 0.05000 0.03193096 0.02836880 0.02550828 0.02319280 0.02130337 0.01974941
a61af66fc99e Initial load duke parents: diff changeset	1224 // 0.10000 0.05247504 0.04547452 0.03988045 0.03537016 0.03170171 0.02869272
a61af66fc99e Initial load duke parents: diff changeset	1225 // 0.15000 0.07135702 0.06111390 0.05296419 0.04641639 0.04110601 0.03676066
a61af66fc99e Initial load duke parents: diff changeset	1226 // 0.20000 0.08831616 0.07509618 0.06461766 0.05622444 0.04943437 0.04388975
a61af66fc99e Initial load duke parents: diff changeset	1227 // 0.25000 0.10311208 0.08724696 0.07471205 0.06469760 0.05661313 0.05002313
a61af66fc99e Initial load duke parents: diff changeset	1228 // 0.30000 0.11553050 0.09741183 0.08313394 0.07175114 0.06257797 0.05511132
a61af66fc99e Initial load duke parents: diff changeset	1229 // 0.35000 0.12538832 0.10545958 0.08978741 0.07731366 0.06727491 0.05911289
a61af66fc99e Initial load duke parents: diff changeset	1230 // 0.40000 0.13253818 0.11128511 0.09459590 0.08132834 0.07066107 0.06199500
a61af66fc99e Initial load duke parents: diff changeset	1231 // 0.45000 0.13687208 0.11481163 0.09750361 0.08375387 0.07270534 0.06373386
a61af66fc99e Initial load duke parents: diff changeset	1232 // 0.50000 0.13832410 0.11599237 0.09847664 0.08456518 0.07338887 0.06431510
a61af66fc99e Initial load duke parents: diff changeset	1233 // 0.55000 0.13687208 0.11481163 0.09750361 0.08375387 0.07270534 0.06373386
a61af66fc99e Initial load duke parents: diff changeset	1234 // 0.60000 0.13253818 0.11128511 0.09459590 0.08132834 0.07066107 0.06199500
a61af66fc99e Initial load duke parents: diff changeset	1235 // 0.65000 0.12538832 0.10545958 0.08978741 0.07731366 0.06727491 0.05911289
a61af66fc99e Initial load duke parents: diff changeset	1236 // 0.70000 0.11553050 0.09741183 0.08313394 0.07175114 0.06257797 0.05511132
a61af66fc99e Initial load duke parents: diff changeset	1237 // 0.75000 0.10311208 0.08724696 0.07471205 0.06469760 0.05661313 0.05002313
a61af66fc99e Initial load duke parents: diff changeset	1238 // 0.80000 0.08831616 0.07509618 0.06461766 0.05622444 0.04943437 0.04388975
a61af66fc99e Initial load duke parents: diff changeset	1239 // 0.85000 0.07135702 0.06111390 0.05296419 0.04641639 0.04110601 0.03676066
a61af66fc99e Initial load duke parents: diff changeset	1240 // 0.90000 0.05247504 0.04547452 0.03988045 0.03537016 0.03170171 0.02869272
a61af66fc99e Initial load duke parents: diff changeset	1241 // 0.95000 0.03193096 0.02836880 0.02550828 0.02319280 0.02130337 0.01974941
a61af66fc99e Initial load duke parents: diff changeset	1242 // 1.00000 0.01000000 0.01000000 0.01000000 0.01000000 0.01000000 0.01000000
a61af66fc99e Initial load duke parents: diff changeset	1243
a61af66fc99e Initial load duke parents: diff changeset	1244 double PSParallelCompact::dead_wood_limiter(double density, size_t min_percent)
a61af66fc99e Initial load duke parents: diff changeset	1245 {
a61af66fc99e Initial load duke parents: diff changeset	1246 assert(_dwl_initialized, "uninitialized");
a61af66fc99e Initial load duke parents: diff changeset	1247
a61af66fc99e Initial load duke parents: diff changeset	1248 // The raw limit is the value of the normal distribution at x = density.
a61af66fc99e Initial load duke parents: diff changeset	1249 const double raw_limit = normal_distribution(density);
a61af66fc99e Initial load duke parents: diff changeset	1250
a61af66fc99e Initial load duke parents: diff changeset	1251 // Adjust the raw limit so it becomes the minimum when the density is 1.
a61af66fc99e Initial load duke parents: diff changeset	1252 //
a61af66fc99e Initial load duke parents: diff changeset	1253 // First subtract the adjustment value (which is simply the precomputed value
a61af66fc99e Initial load duke parents: diff changeset	1254 // normal_distribution(1.0)); this yields a value of 0 when the density is 1.
a61af66fc99e Initial load duke parents: diff changeset	1255 // Then add the minimum value, so the minimum is returned when the density is
a61af66fc99e Initial load duke parents: diff changeset	1256 // 1. Finally, prevent negative values, which occur when the mean is not 0.5.
a61af66fc99e Initial load duke parents: diff changeset	1257 const double min = double(min_percent) / 100.0;
a61af66fc99e Initial load duke parents: diff changeset	1258 const double limit = raw_limit - _dwl_adjustment + min;
a61af66fc99e Initial load duke parents: diff changeset	1259 return MAX2(limit, 0.0);
a61af66fc99e Initial load duke parents: diff changeset	1260 }
a61af66fc99e Initial load duke parents: diff changeset	1261
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1262 ParallelCompactData::RegionData*
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1263 PSParallelCompact::first_dead_space_region(const RegionData* beg,
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1264 const RegionData* end)
0 a61af66fc99e Initial load duke parents: diff changeset	1265 {
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1266 const size_t region_size = ParallelCompactData::RegionSize;
0 a61af66fc99e Initial load duke parents: diff changeset	1267 ParallelCompactData& sd = summary_data();
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1268 size_t left = sd.region(beg);
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1269 size_t right = end > beg ? sd.region(end) - 1 : left;
0 a61af66fc99e Initial load duke parents: diff changeset	1270
a61af66fc99e Initial load duke parents: diff changeset	1271 // Binary search.
a61af66fc99e Initial load duke parents: diff changeset	1272 while (left < right) {
a61af66fc99e Initial load duke parents: diff changeset	1273 // Equivalent to (left + right) / 2, but does not overflow.
a61af66fc99e Initial load duke parents: diff changeset	1274 const size_t middle = left + (right - left) / 2;
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1275 RegionData* const middle_ptr = sd.region(middle);
0 a61af66fc99e Initial load duke parents: diff changeset	1276 HeapWord* const dest = middle_ptr->destination();
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1277 HeapWord* const addr = sd.region_to_addr(middle);
0 a61af66fc99e Initial load duke parents: diff changeset	1278 assert(dest != NULL, "sanity");
a61af66fc99e Initial load duke parents: diff changeset	1279 assert(dest <= addr, "must move left");
a61af66fc99e Initial load duke parents: diff changeset	1280
a61af66fc99e Initial load duke parents: diff changeset	1281 if (middle > left && dest < addr) {
a61af66fc99e Initial load duke parents: diff changeset	1282 right = middle - 1;
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1283 } else if (middle < right && middle_ptr->data_size() == region_size) {
0 a61af66fc99e Initial load duke parents: diff changeset	1284 left = middle + 1;
a61af66fc99e Initial load duke parents: diff changeset	1285 } else {
a61af66fc99e Initial load duke parents: diff changeset	1286 return middle_ptr;
a61af66fc99e Initial load duke parents: diff changeset	1287 }
a61af66fc99e Initial load duke parents: diff changeset	1288 }
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1289 return sd.region(left);
0 a61af66fc99e Initial load duke parents: diff changeset	1290 }
a61af66fc99e Initial load duke parents: diff changeset	1291
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1292 ParallelCompactData::RegionData*
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1293 PSParallelCompact::dead_wood_limit_region(const RegionData* beg,
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1294 const RegionData* end,
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1295 size_t dead_words)
0 a61af66fc99e Initial load duke parents: diff changeset	1296 {
a61af66fc99e Initial load duke parents: diff changeset	1297 ParallelCompactData& sd = summary_data();
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1298 size_t left = sd.region(beg);
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1299 size_t right = end > beg ? sd.region(end) - 1 : left;
0 a61af66fc99e Initial load duke parents: diff changeset	1300
a61af66fc99e Initial load duke parents: diff changeset	1301 // Binary search.
a61af66fc99e Initial load duke parents: diff changeset	1302 while (left < right) {
a61af66fc99e Initial load duke parents: diff changeset	1303 // Equivalent to (left + right) / 2, but does not overflow.
a61af66fc99e Initial load duke parents: diff changeset	1304 const size_t middle = left + (right - left) / 2;
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1305 RegionData* const middle_ptr = sd.region(middle);
0 a61af66fc99e Initial load duke parents: diff changeset	1306 HeapWord* const dest = middle_ptr->destination();
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1307 HeapWord* const addr = sd.region_to_addr(middle);
0 a61af66fc99e Initial load duke parents: diff changeset	1308 assert(dest != NULL, "sanity");
a61af66fc99e Initial load duke parents: diff changeset	1309 assert(dest <= addr, "must move left");
a61af66fc99e Initial load duke parents: diff changeset	1310
a61af66fc99e Initial load duke parents: diff changeset	1311 const size_t dead_to_left = pointer_delta(addr, dest);
a61af66fc99e Initial load duke parents: diff changeset	1312 if (middle > left && dead_to_left > dead_words) {
a61af66fc99e Initial load duke parents: diff changeset	1313 right = middle - 1;
a61af66fc99e Initial load duke parents: diff changeset	1314 } else if (middle < right && dead_to_left < dead_words) {
a61af66fc99e Initial load duke parents: diff changeset	1315 left = middle + 1;
a61af66fc99e Initial load duke parents: diff changeset	1316 } else {
a61af66fc99e Initial load duke parents: diff changeset	1317 return middle_ptr;
a61af66fc99e Initial load duke parents: diff changeset	1318 }
a61af66fc99e Initial load duke parents: diff changeset	1319 }
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1320 return sd.region(left);
0 a61af66fc99e Initial load duke parents: diff changeset	1321 }
a61af66fc99e Initial load duke parents: diff changeset	1322
a61af66fc99e Initial load duke parents: diff changeset	1323 // The result is valid during the summary phase, after the initial summarization
a61af66fc99e Initial load duke parents: diff changeset	1324 // of each space into itself, and before final summarization.
a61af66fc99e Initial load duke parents: diff changeset	1325 inline double
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1326 PSParallelCompact::reclaimed_ratio(const RegionData* const cp,
0 a61af66fc99e Initial load duke parents: diff changeset	1327 HeapWord* const bottom,
a61af66fc99e Initial load duke parents: diff changeset	1328 HeapWord* const top,
a61af66fc99e Initial load duke parents: diff changeset	1329 HeapWord* const new_top)
a61af66fc99e Initial load duke parents: diff changeset	1330 {
a61af66fc99e Initial load duke parents: diff changeset	1331 ParallelCompactData& sd = summary_data();
a61af66fc99e Initial load duke parents: diff changeset	1332
a61af66fc99e Initial load duke parents: diff changeset	1333 assert(cp != NULL, "sanity");
a61af66fc99e Initial load duke parents: diff changeset	1334 assert(bottom != NULL, "sanity");
a61af66fc99e Initial load duke parents: diff changeset	1335 assert(top != NULL, "sanity");
a61af66fc99e Initial load duke parents: diff changeset	1336 assert(new_top != NULL, "sanity");
a61af66fc99e Initial load duke parents: diff changeset	1337 assert(top >= new_top, "summary data problem?");
a61af66fc99e Initial load duke parents: diff changeset	1338 assert(new_top > bottom, "space is empty; should not be here");
a61af66fc99e Initial load duke parents: diff changeset	1339 assert(new_top >= cp->destination(), "sanity");
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1340 assert(top >= sd.region_to_addr(cp), "sanity");
0 a61af66fc99e Initial load duke parents: diff changeset	1341
a61af66fc99e Initial load duke parents: diff changeset	1342 HeapWord* const destination = cp->destination();
a61af66fc99e Initial load duke parents: diff changeset	1343 const size_t dense_prefix_live = pointer_delta(destination, bottom);
a61af66fc99e Initial load duke parents: diff changeset	1344 const size_t compacted_region_live = pointer_delta(new_top, destination);
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1345 const size_t compacted_region_used = pointer_delta(top,
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1346 sd.region_to_addr(cp));
0 a61af66fc99e Initial load duke parents: diff changeset	1347 const size_t reclaimable = compacted_region_used - compacted_region_live;
a61af66fc99e Initial load duke parents: diff changeset	1348
a61af66fc99e Initial load duke parents: diff changeset	1349 const double divisor = dense_prefix_live + 1.25 * compacted_region_live;
a61af66fc99e Initial load duke parents: diff changeset	1350 return double(reclaimable) / divisor;
a61af66fc99e Initial load duke parents: diff changeset	1351 }
a61af66fc99e Initial load duke parents: diff changeset	1352
a61af66fc99e Initial load duke parents: diff changeset	1353 // Return the address of the end of the dense prefix, a.k.a. the start of the
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1354 // compacted region. The address is always on a region boundary.
0 a61af66fc99e Initial load duke parents: diff changeset	1355 //
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1356 // Completely full regions at the left are skipped, since no compaction can
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1357 // occur in those regions. Then the maximum amount of dead wood to allow is
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1358 // computed, based on the density (amount live / capacity) of the generation;
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1359 // the region with approximately that amount of dead space to the left is
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1360 // identified as the limit region. Regions between the last completely full
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1361 // region and the limit region are scanned and the one that has the best
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1362 // (maximum) reclaimed_ratio() is selected.
0 a61af66fc99e Initial load duke parents: diff changeset	1363 HeapWord*
a61af66fc99e Initial load duke parents: diff changeset	1364 PSParallelCompact::compute_dense_prefix(const SpaceId id,
a61af66fc99e Initial load duke parents: diff changeset	1365 bool maximum_compaction)
a61af66fc99e Initial load duke parents: diff changeset	1366 {
483 0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1367 if (ParallelOldGCSplitALot) {
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1368 if (_space_info[id].dense_prefix() != _space_info[id].space()->bottom()) {
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1369 // The value was chosen to provoke splitting a young gen space; use it.
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1370 return _space_info[id].dense_prefix();
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1371 }
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1372 }
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1373
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1374 const size_t region_size = ParallelCompactData::RegionSize;
0 a61af66fc99e Initial load duke parents: diff changeset	1375 const ParallelCompactData& sd = summary_data();
a61af66fc99e Initial load duke parents: diff changeset	1376
a61af66fc99e Initial load duke parents: diff changeset	1377 const MutableSpace* const space = _space_info[id].space();
a61af66fc99e Initial load duke parents: diff changeset	1378 HeapWord* const top = space->top();
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1379 HeapWord* const top_aligned_up = sd.region_align_up(top);
0 a61af66fc99e Initial load duke parents: diff changeset	1380 HeapWord* const new_top = _space_info[id].new_top();
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1381 HeapWord* const new_top_aligned_up = sd.region_align_up(new_top);
0 a61af66fc99e Initial load duke parents: diff changeset	1382 HeapWord* const bottom = space->bottom();
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1383 const RegionData* const beg_cp = sd.addr_to_region_ptr(bottom);
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1384 const RegionData* const top_cp = sd.addr_to_region_ptr(top_aligned_up);
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1385 const RegionData* const new_top_cp =
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1386 sd.addr_to_region_ptr(new_top_aligned_up);
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1387
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1388 // Skip full regions at the beginning of the space--they are necessarily part
0 a61af66fc99e Initial load duke parents: diff changeset	1389 // of the dense prefix.
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1390 const RegionData* const full_cp = first_dead_space_region(beg_cp, new_top_cp);
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1391 assert(full_cp->destination() == sd.region_to_addr(full_cp) \|\|
0 a61af66fc99e Initial load duke parents: diff changeset	1392 space->is_empty(), "no dead space allowed to the left");
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1393 assert(full_cp->data_size() < region_size \|\| full_cp == new_top_cp - 1,
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1394 "region must have dead space");
0 a61af66fc99e Initial load duke parents: diff changeset	1395
a61af66fc99e Initial load duke parents: diff changeset	1396 // The gc number is saved whenever a maximum compaction is done, and used to
a61af66fc99e Initial load duke parents: diff changeset	1397 // determine when the maximum compaction interval has expired. This avoids
a61af66fc99e Initial load duke parents: diff changeset	1398 // successive max compactions for different reasons.
a61af66fc99e Initial load duke parents: diff changeset	1399 assert(total_invocations() >= _maximum_compaction_gc_num, "sanity");
a61af66fc99e Initial load duke parents: diff changeset	1400 const size_t gcs_since_max = total_invocations() - _maximum_compaction_gc_num;
a61af66fc99e Initial load duke parents: diff changeset	1401 const bool interval_ended = gcs_since_max > HeapMaximumCompactionInterval \|\|
a61af66fc99e Initial load duke parents: diff changeset	1402 total_invocations() == HeapFirstMaximumCompactionCount;
a61af66fc99e Initial load duke parents: diff changeset	1403 if (maximum_compaction \|\| full_cp == top_cp \|\| interval_ended) {
a61af66fc99e Initial load duke parents: diff changeset	1404 _maximum_compaction_gc_num = total_invocations();
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1405 return sd.region_to_addr(full_cp);
0 a61af66fc99e Initial load duke parents: diff changeset	1406 }
a61af66fc99e Initial load duke parents: diff changeset	1407
a61af66fc99e Initial load duke parents: diff changeset	1408 const size_t space_live = pointer_delta(new_top, bottom);
a61af66fc99e Initial load duke parents: diff changeset	1409 const size_t space_used = space->used_in_words();
a61af66fc99e Initial load duke parents: diff changeset	1410 const size_t space_capacity = space->capacity_in_words();
a61af66fc99e Initial load duke parents: diff changeset	1411
a61af66fc99e Initial load duke parents: diff changeset	1412 const double density = double(space_live) / double(space_capacity);
6725 da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	1413 const size_t min_percent_free = MarkSweepDeadRatio;
0 a61af66fc99e Initial load duke parents: diff changeset	1414 const double limiter = dead_wood_limiter(density, min_percent_free);
a61af66fc99e Initial load duke parents: diff changeset	1415 const size_t dead_wood_max = space_used - space_live;
a61af66fc99e Initial load duke parents: diff changeset	1416 const size_t dead_wood_limit = MIN2(size_t(space_capacity * limiter),
a61af66fc99e Initial load duke parents: diff changeset	1417 dead_wood_max);
a61af66fc99e Initial load duke parents: diff changeset	1418
a61af66fc99e Initial load duke parents: diff changeset	1419 if (TraceParallelOldGCDensePrefix) {
a61af66fc99e Initial load duke parents: diff changeset	1420 tty->print_cr("space_live=" SIZE_FORMAT " " "space_used=" SIZE_FORMAT " "
a61af66fc99e Initial load duke parents: diff changeset	1421 "space_cap=" SIZE_FORMAT,
a61af66fc99e Initial load duke parents: diff changeset	1422 space_live, space_used,
a61af66fc99e Initial load duke parents: diff changeset	1423 space_capacity);
a61af66fc99e Initial load duke parents: diff changeset	1424 tty->print_cr("dead_wood_limiter(%6.4f, %d)=%6.4f "
a61af66fc99e Initial load duke parents: diff changeset	1425 "dead_wood_max=" SIZE_FORMAT " dead_wood_limit=" SIZE_FORMAT,
a61af66fc99e Initial load duke parents: diff changeset	1426 density, min_percent_free, limiter,
a61af66fc99e Initial load duke parents: diff changeset	1427 dead_wood_max, dead_wood_limit);
a61af66fc99e Initial load duke parents: diff changeset	1428 }
a61af66fc99e Initial load duke parents: diff changeset	1429
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1430 // Locate the region with the desired amount of dead space to the left.
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1431 const RegionData* const limit_cp =
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1432 dead_wood_limit_region(full_cp, top_cp, dead_wood_limit);
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1433
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1434 // Scan from the first region with dead space to the limit region and find the
0 a61af66fc99e Initial load duke parents: diff changeset	1435 // one with the best (largest) reclaimed ratio.
a61af66fc99e Initial load duke parents: diff changeset	1436 double best_ratio = 0.0;
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1437 const RegionData* best_cp = full_cp;
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1438 for (const RegionData* cp = full_cp; cp < limit_cp; ++cp) {
0 a61af66fc99e Initial load duke parents: diff changeset	1439 double tmp_ratio = reclaimed_ratio(cp, bottom, top, new_top);
a61af66fc99e Initial load duke parents: diff changeset	1440 if (tmp_ratio > best_ratio) {
a61af66fc99e Initial load duke parents: diff changeset	1441 best_cp = cp;
a61af66fc99e Initial load duke parents: diff changeset	1442 best_ratio = tmp_ratio;
a61af66fc99e Initial load duke parents: diff changeset	1443 }
a61af66fc99e Initial load duke parents: diff changeset	1444 }
a61af66fc99e Initial load duke parents: diff changeset	1445
a61af66fc99e Initial load duke parents: diff changeset	1446 #if 0
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1447 // Something to consider: if the region with the best ratio is 'close to' the
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1448 // first region w/free space, choose the first region with free space
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1449 // ("first-free"). The first-free region is usually near the start of the
0 a61af66fc99e Initial load duke parents: diff changeset	1450 // heap, which means we are copying most of the heap already, so copy a bit
a61af66fc99e Initial load duke parents: diff changeset	1451 // more to get complete compaction.
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1452 if (pointer_delta(best_cp, full_cp, sizeof(RegionData)) < 4) {
0 a61af66fc99e Initial load duke parents: diff changeset	1453 _maximum_compaction_gc_num = total_invocations();
a61af66fc99e Initial load duke parents: diff changeset	1454 best_cp = full_cp;
a61af66fc99e Initial load duke parents: diff changeset	1455 }
a61af66fc99e Initial load duke parents: diff changeset	1456 #endif // #if 0
a61af66fc99e Initial load duke parents: diff changeset	1457
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1458 return sd.region_to_addr(best_cp);
0 a61af66fc99e Initial load duke parents: diff changeset	1459 }
a61af66fc99e Initial load duke parents: diff changeset	1460
483 0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1461 #ifndef PRODUCT
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1462 void
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1463 PSParallelCompact::fill_with_live_objects(SpaceId id, HeapWord* const start,
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1464 size_t words)
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1465 {
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1466 if (TraceParallelOldGCSummaryPhase) {
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1467 tty->print_cr("fill_with_live_objects [" PTR_FORMAT " " PTR_FORMAT ") "
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1468 SIZE_FORMAT, start, start + words, words);
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1469 }
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1470
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1471 ObjectStartArray* const start_array = _space_info[id].start_array();
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1472 CollectedHeap::fill_with_objects(start, words);
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1473 for (HeapWord* p = start; p < start + words; p += oop(p)->size()) {
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1474 _mark_bitmap.mark_obj(p, words);
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1475 _summary_data.add_obj(p, words);
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1476 start_array->allocate_block(p);
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1477 }
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1478 }
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1479
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1480 void
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1481 PSParallelCompact::summarize_new_objects(SpaceId id, HeapWord* start)
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1482 {
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1483 ParallelCompactData& sd = summary_data();
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1484 MutableSpace* space = _space_info[id].space();
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1485
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1486 // Find the source and destination start addresses.
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1487 HeapWord* const src_addr = sd.region_align_down(start);
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1488 HeapWord* dst_addr;
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1489 if (src_addr < start) {
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1490 dst_addr = sd.addr_to_region_ptr(src_addr)->destination();
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1491 } else if (src_addr > space->bottom()) {
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1492 // The start (the original top() value) is aligned to a region boundary so
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1493 // the associated region does not have a destination. Compute the
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1494 // destination from the previous region.
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1495 RegionData* const cp = sd.addr_to_region_ptr(src_addr) - 1;
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1496 dst_addr = cp->destination() + cp->data_size();
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1497 } else {
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1498 // Filling the entire space.
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1499 dst_addr = space->bottom();
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1500 }
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1501 assert(dst_addr != NULL, "sanity");
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1502
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1503 // Update the summary data.
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1504 bool result = _summary_data.summarize(_space_info[id].split_info(),
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1505 src_addr, space->top(), NULL,
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1506 dst_addr, space->end(),
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1507 _space_info[id].new_top_addr());
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1508 assert(result, "should not fail: bad filler object size");
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1509 }
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1510
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1511 void
496 b27c885f75f9 6786188: par compact - "SplitALot" stress mode should fill to_space jcoomes parents: 495 diff changeset	1512 PSParallelCompact::provoke_split_fill_survivor(SpaceId id)
b27c885f75f9 6786188: par compact - "SplitALot" stress mode should fill to_space jcoomes parents: 495 diff changeset	1513 {
b27c885f75f9 6786188: par compact - "SplitALot" stress mode should fill to_space jcoomes parents: 495 diff changeset	1514 if (total_invocations() % (ParallelOldGCSplitInterval * 3) != 0) {
b27c885f75f9 6786188: par compact - "SplitALot" stress mode should fill to_space jcoomes parents: 495 diff changeset	1515 return;
b27c885f75f9 6786188: par compact - "SplitALot" stress mode should fill to_space jcoomes parents: 495 diff changeset	1516 }
b27c885f75f9 6786188: par compact - "SplitALot" stress mode should fill to_space jcoomes parents: 495 diff changeset	1517
b27c885f75f9 6786188: par compact - "SplitALot" stress mode should fill to_space jcoomes parents: 495 diff changeset	1518 MutableSpace* const space = _space_info[id].space();
b27c885f75f9 6786188: par compact - "SplitALot" stress mode should fill to_space jcoomes parents: 495 diff changeset	1519 if (space->is_empty()) {
b27c885f75f9 6786188: par compact - "SplitALot" stress mode should fill to_space jcoomes parents: 495 diff changeset	1520 HeapWord* b = space->bottom();
b27c885f75f9 6786188: par compact - "SplitALot" stress mode should fill to_space jcoomes parents: 495 diff changeset	1521 HeapWord* t = b + space->capacity_in_words() / 2;
b27c885f75f9 6786188: par compact - "SplitALot" stress mode should fill to_space jcoomes parents: 495 diff changeset	1522 space->set_top(t);
b27c885f75f9 6786188: par compact - "SplitALot" stress mode should fill to_space jcoomes parents: 495 diff changeset	1523 if (ZapUnusedHeapArea) {
b27c885f75f9 6786188: par compact - "SplitALot" stress mode should fill to_space jcoomes parents: 495 diff changeset	1524 space->set_top_for_allocations();
b27c885f75f9 6786188: par compact - "SplitALot" stress mode should fill to_space jcoomes parents: 495 diff changeset	1525 }
b27c885f75f9 6786188: par compact - "SplitALot" stress mode should fill to_space jcoomes parents: 495 diff changeset	1526
1571 2d127394260e 6916623: Align object to 16 bytes to use Compressed Oops with java heap up to 64Gb kvn parents: 1489 diff changeset	1527 size_t min_size = CollectedHeap::min_fill_size();
2d127394260e 6916623: Align object to 16 bytes to use Compressed Oops with java heap up to 64Gb kvn parents: 1489 diff changeset	1528 size_t obj_len = min_size;
496 b27c885f75f9 6786188: par compact - "SplitALot" stress mode should fill to_space jcoomes parents: 495 diff changeset	1529 while (b + obj_len <= t) {
b27c885f75f9 6786188: par compact - "SplitALot" stress mode should fill to_space jcoomes parents: 495 diff changeset	1530 CollectedHeap::fill_with_object(b, obj_len);
b27c885f75f9 6786188: par compact - "SplitALot" stress mode should fill to_space jcoomes parents: 495 diff changeset	1531 mark_bitmap()->mark_obj(b, obj_len);
b27c885f75f9 6786188: par compact - "SplitALot" stress mode should fill to_space jcoomes parents: 495 diff changeset	1532 summary_data().add_obj(b, obj_len);
b27c885f75f9 6786188: par compact - "SplitALot" stress mode should fill to_space jcoomes parents: 495 diff changeset	1533 b += obj_len;
1571 2d127394260e 6916623: Align object to 16 bytes to use Compressed Oops with java heap up to 64Gb kvn parents: 1489 diff changeset	1534 obj_len = (obj_len & (min_size*3)) + min_size; // 8 16 24 32 8 16 24 32 ...
496 b27c885f75f9 6786188: par compact - "SplitALot" stress mode should fill to_space jcoomes parents: 495 diff changeset	1535 }
b27c885f75f9 6786188: par compact - "SplitALot" stress mode should fill to_space jcoomes parents: 495 diff changeset	1536 if (b < t) {
b27c885f75f9 6786188: par compact - "SplitALot" stress mode should fill to_space jcoomes parents: 495 diff changeset	1537 // The loop didn't completely fill to t (top); adjust top downward.
b27c885f75f9 6786188: par compact - "SplitALot" stress mode should fill to_space jcoomes parents: 495 diff changeset	1538 space->set_top(b);
b27c885f75f9 6786188: par compact - "SplitALot" stress mode should fill to_space jcoomes parents: 495 diff changeset	1539 if (ZapUnusedHeapArea) {
b27c885f75f9 6786188: par compact - "SplitALot" stress mode should fill to_space jcoomes parents: 495 diff changeset	1540 space->set_top_for_allocations();
b27c885f75f9 6786188: par compact - "SplitALot" stress mode should fill to_space jcoomes parents: 495 diff changeset	1541 }
b27c885f75f9 6786188: par compact - "SplitALot" stress mode should fill to_space jcoomes parents: 495 diff changeset	1542 }
b27c885f75f9 6786188: par compact - "SplitALot" stress mode should fill to_space jcoomes parents: 495 diff changeset	1543
b27c885f75f9 6786188: par compact - "SplitALot" stress mode should fill to_space jcoomes parents: 495 diff changeset	1544 HeapWord** nta = _space_info[id].new_top_addr();
b27c885f75f9 6786188: par compact - "SplitALot" stress mode should fill to_space jcoomes parents: 495 diff changeset	1545 bool result = summary_data().summarize(_space_info[id].split_info(),
b27c885f75f9 6786188: par compact - "SplitALot" stress mode should fill to_space jcoomes parents: 495 diff changeset	1546 space->bottom(), space->top(), NULL,
b27c885f75f9 6786188: par compact - "SplitALot" stress mode should fill to_space jcoomes parents: 495 diff changeset	1547 space->bottom(), space->end(), nta);
b27c885f75f9 6786188: par compact - "SplitALot" stress mode should fill to_space jcoomes parents: 495 diff changeset	1548 assert(result, "space must fit into itself");
b27c885f75f9 6786188: par compact - "SplitALot" stress mode should fill to_space jcoomes parents: 495 diff changeset	1549 }
b27c885f75f9 6786188: par compact - "SplitALot" stress mode should fill to_space jcoomes parents: 495 diff changeset	1550 }
b27c885f75f9 6786188: par compact - "SplitALot" stress mode should fill to_space jcoomes parents: 495 diff changeset	1551
b27c885f75f9 6786188: par compact - "SplitALot" stress mode should fill to_space jcoomes parents: 495 diff changeset	1552 void
483 0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1553 PSParallelCompact::provoke_split(bool & max_compaction)
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1554 {
496 b27c885f75f9 6786188: par compact - "SplitALot" stress mode should fill to_space jcoomes parents: 495 diff changeset	1555 if (total_invocations() % ParallelOldGCSplitInterval != 0) {
b27c885f75f9 6786188: par compact - "SplitALot" stress mode should fill to_space jcoomes parents: 495 diff changeset	1556 return;
b27c885f75f9 6786188: par compact - "SplitALot" stress mode should fill to_space jcoomes parents: 495 diff changeset	1557 }
b27c885f75f9 6786188: par compact - "SplitALot" stress mode should fill to_space jcoomes parents: 495 diff changeset	1558
483 0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1559 const size_t region_size = ParallelCompactData::RegionSize;
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1560 ParallelCompactData& sd = summary_data();
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1561
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1562 MutableSpace* const eden_space = _space_info[eden_space_id].space();
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1563 MutableSpace* const from_space = _space_info[from_space_id].space();
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1564 const size_t eden_live = pointer_delta(eden_space->top(),
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1565 _space_info[eden_space_id].new_top());
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1566 const size_t from_live = pointer_delta(from_space->top(),
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1567 _space_info[from_space_id].new_top());
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1568
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1569 const size_t min_fill_size = CollectedHeap::min_fill_size();
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1570 const size_t eden_free = pointer_delta(eden_space->end(), eden_space->top());
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1571 const size_t eden_fillable = eden_free >= min_fill_size ? eden_free : 0;
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1572 const size_t from_free = pointer_delta(from_space->end(), from_space->top());
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1573 const size_t from_fillable = from_free >= min_fill_size ? from_free : 0;
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1574
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1575 // Choose the space to split; need at least 2 regions live (or fillable).
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1576 SpaceId id;
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1577 MutableSpace* space;
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1578 size_t live_words;
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1579 size_t fill_words;
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1580 if (eden_live + eden_fillable >= region_size * 2) {
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1581 id = eden_space_id;
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1582 space = eden_space;
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1583 live_words = eden_live;
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1584 fill_words = eden_fillable;
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1585 } else if (from_live + from_fillable >= region_size * 2) {
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1586 id = from_space_id;
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1587 space = from_space;
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1588 live_words = from_live;
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1589 fill_words = from_fillable;
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1590 } else {
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1591 return; // Give up.
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1592 }
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1593 assert(fill_words == 0 \|\| fill_words >= min_fill_size, "sanity");
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1594
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1595 if (live_words < region_size * 2) {
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1596 // Fill from top() to end() w/live objects of mixed sizes.
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1597 HeapWord* const fill_start = space->top();
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1598 live_words += fill_words;
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1599
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1600 space->set_top(fill_start + fill_words);
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1601 if (ZapUnusedHeapArea) {
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1602 space->set_top_for_allocations();
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1603 }
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1604
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1605 HeapWord* cur_addr = fill_start;
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1606 while (fill_words > 0) {
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1607 const size_t r = (size_t)os::random() % (region_size / 2) + min_fill_size;
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1608 size_t cur_size = MIN2(align_object_size_(r), fill_words);
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1609 if (fill_words - cur_size < min_fill_size) {
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1610 cur_size = fill_words; // Avoid leaving a fragment too small to fill.
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1611 }
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1612
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1613 CollectedHeap::fill_with_object(cur_addr, cur_size);
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1614 mark_bitmap()->mark_obj(cur_addr, cur_size);
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1615 sd.add_obj(cur_addr, cur_size);
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1616
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1617 cur_addr += cur_size;
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1618 fill_words -= cur_size;
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1619 }
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1620
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1621 summarize_new_objects(id, fill_start);
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1622 }
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1623
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1624 max_compaction = false;
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1625
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1626 // Manipulate the old gen so that it has room for about half of the live data
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1627 // in the target young gen space (live_words / 2).
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1628 id = old_space_id;
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1629 space = _space_info[id].space();
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1630 const size_t free_at_end = space->free_in_words();
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1631 const size_t free_target = align_object_size(live_words / 2);
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1632 const size_t dead = pointer_delta(space->top(), _space_info[id].new_top());
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1633
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1634 if (free_at_end >= free_target + min_fill_size) {
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1635 // Fill space above top() and set the dense prefix so everything survives.
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1636 HeapWord* const fill_start = space->top();
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1637 const size_t fill_size = free_at_end - free_target;
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1638 space->set_top(space->top() + fill_size);
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1639 if (ZapUnusedHeapArea) {
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1640 space->set_top_for_allocations();
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1641 }
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1642 fill_with_live_objects(id, fill_start, fill_size);
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1643 summarize_new_objects(id, fill_start);
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1644 _space_info[id].set_dense_prefix(sd.region_align_down(space->top()));
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1645 } else if (dead + free_at_end > free_target) {
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1646 // Find a dense prefix that makes the right amount of space available.
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1647 HeapWord* cur = sd.region_align_down(space->top());
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1648 HeapWord* cur_destination = sd.addr_to_region_ptr(cur)->destination();
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1649 size_t dead_to_right = pointer_delta(space->end(), cur_destination);
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1650 while (dead_to_right < free_target) {
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1651 cur -= region_size;
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1652 cur_destination = sd.addr_to_region_ptr(cur)->destination();
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1653 dead_to_right = pointer_delta(space->end(), cur_destination);
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1654 }
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1655 _space_info[id].set_dense_prefix(cur);
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1656 }
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1657 }
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1658 #endif // #ifndef PRODUCT
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1659
0 a61af66fc99e Initial load duke parents: diff changeset	1660 void PSParallelCompact::summarize_spaces_quick()
a61af66fc99e Initial load duke parents: diff changeset	1661 {
a61af66fc99e Initial load duke parents: diff changeset	1662 for (unsigned int i = 0; i < last_space_id; ++i) {
a61af66fc99e Initial load duke parents: diff changeset	1663 const MutableSpace* space = _space_info[i].space();
482 7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1664 HeapWord** nta = _space_info[i].new_top_addr();
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1665 bool result = _summary_data.summarize(_space_info[i].split_info(),
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1666 space->bottom(), space->top(), NULL,
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1667 space->bottom(), space->end(), nta);
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1668 assert(result, "space must fit into itself");
0 a61af66fc99e Initial load duke parents: diff changeset	1669 _space_info[i].set_dense_prefix(space->bottom());
a61af66fc99e Initial load duke parents: diff changeset	1670 }
496 b27c885f75f9 6786188: par compact - "SplitALot" stress mode should fill to_space jcoomes parents: 495 diff changeset	1671
b27c885f75f9 6786188: par compact - "SplitALot" stress mode should fill to_space jcoomes parents: 495 diff changeset	1672 #ifndef PRODUCT
b27c885f75f9 6786188: par compact - "SplitALot" stress mode should fill to_space jcoomes parents: 495 diff changeset	1673 if (ParallelOldGCSplitALot) {
b27c885f75f9 6786188: par compact - "SplitALot" stress mode should fill to_space jcoomes parents: 495 diff changeset	1674 provoke_split_fill_survivor(to_space_id);
b27c885f75f9 6786188: par compact - "SplitALot" stress mode should fill to_space jcoomes parents: 495 diff changeset	1675 }
b27c885f75f9 6786188: par compact - "SplitALot" stress mode should fill to_space jcoomes parents: 495 diff changeset	1676 #endif // #ifndef PRODUCT
0 a61af66fc99e Initial load duke parents: diff changeset	1677 }
a61af66fc99e Initial load duke parents: diff changeset	1678
a61af66fc99e Initial load duke parents: diff changeset	1679 void PSParallelCompact::fill_dense_prefix_end(SpaceId id)
a61af66fc99e Initial load duke parents: diff changeset	1680 {
a61af66fc99e Initial load duke parents: diff changeset	1681 HeapWord* const dense_prefix_end = dense_prefix(id);
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1682 const RegionData* region = _summary_data.addr_to_region_ptr(dense_prefix_end);
0 a61af66fc99e Initial load duke parents: diff changeset	1683 const idx_t dense_prefix_bit = _mark_bitmap.addr_to_bit(dense_prefix_end);
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1684 if (dead_space_crosses_boundary(region, dense_prefix_bit)) {
0 a61af66fc99e Initial load duke parents: diff changeset	1685 // Only enough dead space is filled so that any remaining dead space to the
a61af66fc99e Initial load duke parents: diff changeset	1686 // left is larger than the minimum filler object. (The remainder is filled
a61af66fc99e Initial load duke parents: diff changeset	1687 // during the copy/update phase.)
a61af66fc99e Initial load duke parents: diff changeset	1688 //
a61af66fc99e Initial load duke parents: diff changeset	1689 // The size of the dead space to the right of the boundary is not a
a61af66fc99e Initial load duke parents: diff changeset	1690 // concern, since compaction will be able to use whatever space is
a61af66fc99e Initial load duke parents: diff changeset	1691 // available.
a61af66fc99e Initial load duke parents: diff changeset	1692 //
a61af66fc99e Initial load duke parents: diff changeset	1693 // Here '\|\|' is the boundary, 'x' represents a don't care bit and a box
a61af66fc99e Initial load duke parents: diff changeset	1694 // surrounds the space to be filled with an object.
a61af66fc99e Initial load duke parents: diff changeset	1695 //
a61af66fc99e Initial load duke parents: diff changeset	1696 // In the 32-bit VM, each bit represents two 32-bit words:
a61af66fc99e Initial load duke parents: diff changeset	1697 // +---+
a61af66fc99e Initial load duke parents: diff changeset	1698 // a) beg_bits: ... x x x \| 0 \| \|\| 0 x x ...
a61af66fc99e Initial load duke parents: diff changeset	1699 // end_bits: ... x x x \| 0 \| \|\| 0 x x ...
a61af66fc99e Initial load duke parents: diff changeset	1700 // +---+
a61af66fc99e Initial load duke parents: diff changeset	1701 //
a61af66fc99e Initial load duke parents: diff changeset	1702 // In the 64-bit VM, each bit represents one 64-bit word:
a61af66fc99e Initial load duke parents: diff changeset	1703 // +------------+
a61af66fc99e Initial load duke parents: diff changeset	1704 // b) beg_bits: ... x x x \| 0 \|\| 0 \| x x ...
a61af66fc99e Initial load duke parents: diff changeset	1705 // end_bits: ... x x 1 \| 0 \|\| 0 \| x x ...
a61af66fc99e Initial load duke parents: diff changeset	1706 // +------------+
a61af66fc99e Initial load duke parents: diff changeset	1707 // +-------+
a61af66fc99e Initial load duke parents: diff changeset	1708 // c) beg_bits: ... x x \| 0 0 \| \|\| 0 x x ...
a61af66fc99e Initial load duke parents: diff changeset	1709 // end_bits: ... x 1 \| 0 0 \| \|\| 0 x x ...
a61af66fc99e Initial load duke parents: diff changeset	1710 // +-------+
a61af66fc99e Initial load duke parents: diff changeset	1711 // +-----------+
a61af66fc99e Initial load duke parents: diff changeset	1712 // d) beg_bits: ... x \| 0 0 0 \| \|\| 0 x x ...
a61af66fc99e Initial load duke parents: diff changeset	1713 // end_bits: ... 1 \| 0 0 0 \| \|\| 0 x x ...
a61af66fc99e Initial load duke parents: diff changeset	1714 // +-----------+
a61af66fc99e Initial load duke parents: diff changeset	1715 // +-------+
a61af66fc99e Initial load duke parents: diff changeset	1716 // e) beg_bits: ... 0 0 \| 0 0 \| \|\| 0 x x ...
a61af66fc99e Initial load duke parents: diff changeset	1717 // end_bits: ... 0 0 \| 0 0 \| \|\| 0 x x ...
a61af66fc99e Initial load duke parents: diff changeset	1718 // +-------+
a61af66fc99e Initial load duke parents: diff changeset	1719
a61af66fc99e Initial load duke parents: diff changeset	1720 // Initially assume case a, c or e will apply.
1571 2d127394260e 6916623: Align object to 16 bytes to use Compressed Oops with java heap up to 64Gb kvn parents: 1489 diff changeset	1721 size_t obj_len = CollectedHeap::min_fill_size();
0 a61af66fc99e Initial load duke parents: diff changeset	1722 HeapWord* obj_beg = dense_prefix_end - obj_len;
a61af66fc99e Initial load duke parents: diff changeset	1723
a61af66fc99e Initial load duke parents: diff changeset	1724 #ifdef _LP64
1571 2d127394260e 6916623: Align object to 16 bytes to use Compressed Oops with java heap up to 64Gb kvn parents: 1489 diff changeset	1725 if (MinObjAlignment > 1) { // object alignment > heap word size
2d127394260e 6916623: Align object to 16 bytes to use Compressed Oops with java heap up to 64Gb kvn parents: 1489 diff changeset	1726 // Cases a, c or e.
2d127394260e 6916623: Align object to 16 bytes to use Compressed Oops with java heap up to 64Gb kvn parents: 1489 diff changeset	1727 } else if (_mark_bitmap.is_obj_end(dense_prefix_bit - 2)) {
0 a61af66fc99e Initial load duke parents: diff changeset	1728 // Case b above.
a61af66fc99e Initial load duke parents: diff changeset	1729 obj_beg = dense_prefix_end - 1;
a61af66fc99e Initial load duke parents: diff changeset	1730 } else if (!_mark_bitmap.is_obj_end(dense_prefix_bit - 3) &&
a61af66fc99e Initial load duke parents: diff changeset	1731 _mark_bitmap.is_obj_end(dense_prefix_bit - 4)) {
a61af66fc99e Initial load duke parents: diff changeset	1732 // Case d above.
a61af66fc99e Initial load duke parents: diff changeset	1733 obj_beg = dense_prefix_end - 3;
a61af66fc99e Initial load duke parents: diff changeset	1734 obj_len = 3;
a61af66fc99e Initial load duke parents: diff changeset	1735 }
a61af66fc99e Initial load duke parents: diff changeset	1736 #endif // #ifdef _LP64
a61af66fc99e Initial load duke parents: diff changeset	1737
482 7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1738 CollectedHeap::fill_with_object(obj_beg, obj_len);
0 a61af66fc99e Initial load duke parents: diff changeset	1739 _mark_bitmap.mark_obj(obj_beg, obj_len);
a61af66fc99e Initial load duke parents: diff changeset	1740 _summary_data.add_obj(obj_beg, obj_len);
a61af66fc99e Initial load duke parents: diff changeset	1741 assert(start_array(id) != NULL, "sanity");
a61af66fc99e Initial load duke parents: diff changeset	1742 start_array(id)->allocate_block(obj_beg);
a61af66fc99e Initial load duke parents: diff changeset	1743 }
a61af66fc99e Initial load duke parents: diff changeset	1744 }
a61af66fc99e Initial load duke parents: diff changeset	1745
a61af66fc99e Initial load duke parents: diff changeset	1746 void
482 7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1747 PSParallelCompact::clear_source_region(HeapWord* beg_addr, HeapWord* end_addr)
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1748 {
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1749 RegionData* const beg_ptr = _summary_data.addr_to_region_ptr(beg_addr);
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1750 HeapWord* const end_aligned_up = _summary_data.region_align_up(end_addr);
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1751 RegionData* const end_ptr = _summary_data.addr_to_region_ptr(end_aligned_up);
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1752 for (RegionData* cur = beg_ptr; cur < end_ptr; ++cur) {
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1753 cur->set_source_region(0);
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1754 }
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1755 }
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1756
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1757 void
0 a61af66fc99e Initial load duke parents: diff changeset	1758 PSParallelCompact::summarize_space(SpaceId id, bool maximum_compaction)
a61af66fc99e Initial load duke parents: diff changeset	1759 {
a61af66fc99e Initial load duke parents: diff changeset	1760 assert(id < last_space_id, "id out of range");
483 0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1761 assert(_space_info[id].dense_prefix() == _space_info[id].space()->bottom() \|\|
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1762 ParallelOldGCSplitALot && id == old_space_id,
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1763 "should have been reset in summarize_spaces_quick()");
0 a61af66fc99e Initial load duke parents: diff changeset	1764
a61af66fc99e Initial load duke parents: diff changeset	1765 const MutableSpace* space = _space_info[id].space();
265 f88815ca1af1 6483129: par compact assertion failure (new_top > bottom) jcoomes parents: 264 diff changeset	1766 if (_space_info[id].new_top() != space->bottom()) {
f88815ca1af1 6483129: par compact assertion failure (new_top > bottom) jcoomes parents: 264 diff changeset	1767 HeapWord* dense_prefix_end = compute_dense_prefix(id, maximum_compaction);
f88815ca1af1 6483129: par compact assertion failure (new_top > bottom) jcoomes parents: 264 diff changeset	1768 _space_info[id].set_dense_prefix(dense_prefix_end);
0 a61af66fc99e Initial load duke parents: diff changeset	1769
a61af66fc99e Initial load duke parents: diff changeset	1770 #ifndef PRODUCT
265 f88815ca1af1 6483129: par compact assertion failure (new_top > bottom) jcoomes parents: 264 diff changeset	1771 if (TraceParallelOldGCDensePrefix) {
f88815ca1af1 6483129: par compact assertion failure (new_top > bottom) jcoomes parents: 264 diff changeset	1772 print_dense_prefix_stats("ratio", id, maximum_compaction,
f88815ca1af1 6483129: par compact assertion failure (new_top > bottom) jcoomes parents: 264 diff changeset	1773 dense_prefix_end);
f88815ca1af1 6483129: par compact assertion failure (new_top > bottom) jcoomes parents: 264 diff changeset	1774 HeapWord* addr = compute_dense_prefix_via_density(id, maximum_compaction);
f88815ca1af1 6483129: par compact assertion failure (new_top > bottom) jcoomes parents: 264 diff changeset	1775 print_dense_prefix_stats("density", id, maximum_compaction, addr);
f88815ca1af1 6483129: par compact assertion failure (new_top > bottom) jcoomes parents: 264 diff changeset	1776 }
0 a61af66fc99e Initial load duke parents: diff changeset	1777 #endif // #ifndef PRODUCT
a61af66fc99e Initial load duke parents: diff changeset	1778
483 0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1779 // Recompute the summary data, taking into account the dense prefix. If
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1780 // every last byte will be reclaimed, then the existing summary data which
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1781 // compacts everything can be left in place.
265 f88815ca1af1 6483129: par compact assertion failure (new_top > bottom) jcoomes parents: 264 diff changeset	1782 if (!maximum_compaction && dense_prefix_end != space->bottom()) {
482 7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1783 // If dead space crosses the dense prefix boundary, it is (at least
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1784 // partially) filled with a dummy object, marked live and added to the
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1785 // summary data. This simplifies the copy/update phase and must be done
483 0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1786 // before the final locations of objects are determined, to prevent
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1787 // leaving a fragment of dead space that is too small to fill.
265 f88815ca1af1 6483129: par compact assertion failure (new_top > bottom) jcoomes parents: 264 diff changeset	1788 fill_dense_prefix_end(id);
482 7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1789
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1790 // Compute the destination of each Region, and thus each object.
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1791 _summary_data.summarize_dense_prefix(space->bottom(), dense_prefix_end);
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1792 _summary_data.summarize(_space_info[id].split_info(),
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1793 dense_prefix_end, space->top(), NULL,
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1794 dense_prefix_end, space->end(),
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1795 _space_info[id].new_top_addr());
265 f88815ca1af1 6483129: par compact assertion failure (new_top > bottom) jcoomes parents: 264 diff changeset	1796 }
0 a61af66fc99e Initial load duke parents: diff changeset	1797 }
a61af66fc99e Initial load duke parents: diff changeset	1798
a61af66fc99e Initial load duke parents: diff changeset	1799 if (TraceParallelOldGCSummaryPhase) {
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1800 const size_t region_size = ParallelCompactData::RegionSize;
265 f88815ca1af1 6483129: par compact assertion failure (new_top > bottom) jcoomes parents: 264 diff changeset	1801 HeapWord* const dense_prefix_end = _space_info[id].dense_prefix();
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1802 const size_t dp_region = _summary_data.addr_to_region_idx(dense_prefix_end);
0 a61af66fc99e Initial load duke parents: diff changeset	1803 const size_t dp_words = pointer_delta(dense_prefix_end, space->bottom());
265 f88815ca1af1 6483129: par compact assertion failure (new_top > bottom) jcoomes parents: 264 diff changeset	1804 HeapWord* const new_top = _space_info[id].new_top();
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1805 const HeapWord* nt_aligned_up = _summary_data.region_align_up(new_top);
0 a61af66fc99e Initial load duke parents: diff changeset	1806 const size_t cr_words = pointer_delta(nt_aligned_up, dense_prefix_end);
a61af66fc99e Initial load duke parents: diff changeset	1807 tty->print_cr("id=%d cap=" SIZE_FORMAT " dp=" PTR_FORMAT " "
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1808 "dp_region=" SIZE_FORMAT " " "dp_count=" SIZE_FORMAT " "
0 a61af66fc99e Initial load duke parents: diff changeset	1809 "cr_count=" SIZE_FORMAT " " "nt=" PTR_FORMAT,
a61af66fc99e Initial load duke parents: diff changeset	1810 id, space->capacity_in_words(), dense_prefix_end,
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1811 dp_region, dp_words / region_size,
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1812 cr_words / region_size, new_top);
0 a61af66fc99e Initial load duke parents: diff changeset	1813 }
a61af66fc99e Initial load duke parents: diff changeset	1814 }
a61af66fc99e Initial load duke parents: diff changeset	1815
482 7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1816 #ifndef PRODUCT
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1817 void PSParallelCompact::summary_phase_msg(SpaceId dst_space_id,
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1818 HeapWord* dst_beg, HeapWord* dst_end,
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1819 SpaceId src_space_id,
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1820 HeapWord* src_beg, HeapWord* src_end)
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1821 {
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1822 if (TraceParallelOldGCSummaryPhase) {
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1823 tty->print_cr("summarizing %d [%s] into %d [%s]: "
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1824 "src=" PTR_FORMAT "-" PTR_FORMAT " "
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1825 SIZE_FORMAT "-" SIZE_FORMAT " "
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1826 "dst=" PTR_FORMAT "-" PTR_FORMAT " "
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1827 SIZE_FORMAT "-" SIZE_FORMAT,
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1828 src_space_id, space_names[src_space_id],
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1829 dst_space_id, space_names[dst_space_id],
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1830 src_beg, src_end,
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1831 _summary_data.addr_to_region_idx(src_beg),
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1832 _summary_data.addr_to_region_idx(src_end),
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1833 dst_beg, dst_end,
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1834 _summary_data.addr_to_region_idx(dst_beg),
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1835 _summary_data.addr_to_region_idx(dst_end));
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1836 }
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1837 }
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1838 #endif // #ifndef PRODUCT
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1839
0 a61af66fc99e Initial load duke parents: diff changeset	1840 void PSParallelCompact::summary_phase(ParCompactionManager* cm,
a61af66fc99e Initial load duke parents: diff changeset	1841 bool maximum_compaction)
a61af66fc99e Initial load duke parents: diff changeset	1842 {
a61af66fc99e Initial load duke parents: diff changeset	1843 TraceTime tm("summary phase", print_phases(), true, gclog_or_tty);
a61af66fc99e Initial load duke parents: diff changeset	1844 // trace("2");
a61af66fc99e Initial load duke parents: diff changeset	1845
a61af66fc99e Initial load duke parents: diff changeset	1846 #ifdef ASSERT
a61af66fc99e Initial load duke parents: diff changeset	1847 if (TraceParallelOldGCMarkingPhase) {
a61af66fc99e Initial load duke parents: diff changeset	1848 tty->print_cr("add_obj_count=" SIZE_FORMAT " "
a61af66fc99e Initial load duke parents: diff changeset	1849 "add_obj_bytes=" SIZE_FORMAT,
a61af66fc99e Initial load duke parents: diff changeset	1850 add_obj_count, add_obj_size * HeapWordSize);
a61af66fc99e Initial load duke parents: diff changeset	1851 tty->print_cr("mark_bitmap_count=" SIZE_FORMAT " "
a61af66fc99e Initial load duke parents: diff changeset	1852 "mark_bitmap_bytes=" SIZE_FORMAT,
a61af66fc99e Initial load duke parents: diff changeset	1853 mark_bitmap_count, mark_bitmap_size * HeapWordSize);
a61af66fc99e Initial load duke parents: diff changeset	1854 }
a61af66fc99e Initial load duke parents: diff changeset	1855 #endif // #ifdef ASSERT
a61af66fc99e Initial load duke parents: diff changeset	1856
a61af66fc99e Initial load duke parents: diff changeset	1857 // Quick summarization of each space into itself, to see how much is live.
a61af66fc99e Initial load duke parents: diff changeset	1858 summarize_spaces_quick();
a61af66fc99e Initial load duke parents: diff changeset	1859
a61af66fc99e Initial load duke parents: diff changeset	1860 if (TraceParallelOldGCSummaryPhase) {
a61af66fc99e Initial load duke parents: diff changeset	1861 tty->print_cr("summary_phase: after summarizing each space to self");
a61af66fc99e Initial load duke parents: diff changeset	1862 Universe::print();
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1863 NOT_PRODUCT(print_region_ranges());
0 a61af66fc99e Initial load duke parents: diff changeset	1864 if (Verbose) {
a61af66fc99e Initial load duke parents: diff changeset	1865 NOT_PRODUCT(print_initial_summary_data(_summary_data, _space_info));
a61af66fc99e Initial load duke parents: diff changeset	1866 }
a61af66fc99e Initial load duke parents: diff changeset	1867 }
a61af66fc99e Initial load duke parents: diff changeset	1868
a61af66fc99e Initial load duke parents: diff changeset	1869 // The amount of live data that will end up in old space (assuming it fits).
a61af66fc99e Initial load duke parents: diff changeset	1870 size_t old_space_total_live = 0;
482 7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1871 for (unsigned int id = old_space_id; id < last_space_id; ++id) {
0 a61af66fc99e Initial load duke parents: diff changeset	1872 old_space_total_live += pointer_delta(_space_info[id].new_top(),
a61af66fc99e Initial load duke parents: diff changeset	1873 _space_info[id].space()->bottom());
a61af66fc99e Initial load duke parents: diff changeset	1874 }
a61af66fc99e Initial load duke parents: diff changeset	1875
482 7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1876 MutableSpace* const old_space = _space_info[old_space_id].space();
483 0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1877 const size_t old_capacity = old_space->capacity_in_words();
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1878 if (old_space_total_live > old_capacity) {
0 a61af66fc99e Initial load duke parents: diff changeset	1879 // XXX - should also try to expand
a61af66fc99e Initial load duke parents: diff changeset	1880 maximum_compaction = true;
a61af66fc99e Initial load duke parents: diff changeset	1881 }
483 0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1882 #ifndef PRODUCT
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1883 if (ParallelOldGCSplitALot && old_space_total_live < old_capacity) {
496 b27c885f75f9 6786188: par compact - "SplitALot" stress mode should fill to_space jcoomes parents: 495 diff changeset	1884 provoke_split(maximum_compaction);
483 0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1885 }
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1886 #endif // #ifndef PRODUCT
0 a61af66fc99e Initial load duke parents: diff changeset	1887
6725 da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	1888 // Old generations.
0 a61af66fc99e Initial load duke parents: diff changeset	1889 summarize_space(old_space_id, maximum_compaction);
a61af66fc99e Initial load duke parents: diff changeset	1890
482 7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1891 // Summarize the remaining spaces in the young gen. The initial target space
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1892 // is the old gen. If a space does not fit entirely into the target, then the
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1893 // remainder is compacted into the space itself and that space becomes the new
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1894 // target.
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1895 SpaceId dst_space_id = old_space_id;
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1896 HeapWord* dst_space_end = old_space->end();
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1897 HeapWord** new_top_addr = _space_info[dst_space_id].new_top_addr();
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1898 for (unsigned int id = eden_space_id; id < last_space_id; ++id) {
0 a61af66fc99e Initial load duke parents: diff changeset	1899 const MutableSpace* space = _space_info[id].space();
a61af66fc99e Initial load duke parents: diff changeset	1900 const size_t live = pointer_delta(_space_info[id].new_top(),
a61af66fc99e Initial load duke parents: diff changeset	1901 space->bottom());
482 7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1902 const size_t available = pointer_delta(dst_space_end, *new_top_addr);
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1903
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1904 NOT_PRODUCT(summary_phase_msg(dst_space_id, *new_top_addr, dst_space_end,
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1905 SpaceId(id), space->bottom(), space->top());)
266 2214b226b7f0 6724367: par compact could clear less young gen summary data jcoomes parents: 265 diff changeset	1906 if (live > 0 && live <= available) {
0 a61af66fc99e Initial load duke parents: diff changeset	1907 // All the live data will fit.
482 7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1908 bool done = _summary_data.summarize(_space_info[id].split_info(),
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1909 space->bottom(), space->top(),
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1910 NULL,
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1911 *new_top_addr, dst_space_end,
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1912 new_top_addr);
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1913 assert(done, "space must fit into old gen");
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1914
266 2214b226b7f0 6724367: par compact could clear less young gen summary data jcoomes parents: 265 diff changeset	1915 // Reset the new_top value for the space.
2214b226b7f0 6724367: par compact could clear less young gen summary data jcoomes parents: 265 diff changeset	1916 _space_info[id].set_new_top(space->bottom());
482 7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1917 } else if (live > 0) {
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1918 // Attempt to fit part of the source space into the target space.
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1919 HeapWord* next_src_addr = NULL;
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1920 bool done = _summary_data.summarize(_space_info[id].split_info(),
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1921 space->bottom(), space->top(),
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1922 &next_src_addr,
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1923 *new_top_addr, dst_space_end,
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1924 new_top_addr);
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1925 assert(!done, "space should not fit into old gen");
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1926 assert(next_src_addr != NULL, "sanity");
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1927
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1928 // The source space becomes the new target, so the remainder is compacted
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1929 // within the space itself.
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1930 dst_space_id = SpaceId(id);
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1931 dst_space_end = space->end();
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1932 new_top_addr = _space_info[id].new_top_addr();
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1933 NOT_PRODUCT(summary_phase_msg(dst_space_id,
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1934 space->bottom(), dst_space_end,
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1935 SpaceId(id), next_src_addr, space->top());)
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1936 done = _summary_data.summarize(_space_info[id].split_info(),
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1937 next_src_addr, space->top(),
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1938 NULL,
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1939 space->bottom(), dst_space_end,
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1940 new_top_addr);
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1941 assert(done, "space must fit when compacted into itself");
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1942 assert(*new_top_addr <= space->top(), "usage should not grow");
0 a61af66fc99e Initial load duke parents: diff changeset	1943 }
a61af66fc99e Initial load duke parents: diff changeset	1944 }
a61af66fc99e Initial load duke parents: diff changeset	1945
a61af66fc99e Initial load duke parents: diff changeset	1946 if (TraceParallelOldGCSummaryPhase) {
a61af66fc99e Initial load duke parents: diff changeset	1947 tty->print_cr("summary_phase: after final summarization");
a61af66fc99e Initial load duke parents: diff changeset	1948 Universe::print();
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1949 NOT_PRODUCT(print_region_ranges());
0 a61af66fc99e Initial load duke parents: diff changeset	1950 if (Verbose) {
a61af66fc99e Initial load duke parents: diff changeset	1951 NOT_PRODUCT(print_generic_summary_data(_summary_data, _space_info));
a61af66fc99e Initial load duke parents: diff changeset	1952 }
a61af66fc99e Initial load duke parents: diff changeset	1953 }
a61af66fc99e Initial load duke parents: diff changeset	1954 }
a61af66fc99e Initial load duke parents: diff changeset	1955
a61af66fc99e Initial load duke parents: diff changeset	1956 // This method should contain all heap-specific policy for invoking a full
a61af66fc99e Initial load duke parents: diff changeset	1957 // collection. invoke_no_policy() will only attempt to compact the heap; it
a61af66fc99e Initial load duke parents: diff changeset	1958 // will do nothing further. If we need to bail out for policy reasons, scavenge
a61af66fc99e Initial load duke parents: diff changeset	1959 // before full gc, or any other specialized behavior, it needs to be added here.
a61af66fc99e Initial load duke parents: diff changeset	1960 //
a61af66fc99e Initial load duke parents: diff changeset	1961 // Note that this method should only be called from the vm_thread while at a
a61af66fc99e Initial load duke parents: diff changeset	1962 // safepoint.
1387 0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 1311 diff changeset	1963 //
0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 1311 diff changeset	1964 // Note that the all_soft_refs_clear flag in the collector policy
0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 1311 diff changeset	1965 // may be true because this method can be called without intervening
0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 1311 diff changeset	1966 // activity. For example when the heap space is tight and full measure
0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 1311 diff changeset	1967 // are being taken to free space.
0 a61af66fc99e Initial load duke parents: diff changeset	1968 void PSParallelCompact::invoke(bool maximum_heap_compaction) {
a61af66fc99e Initial load duke parents: diff changeset	1969 assert(SafepointSynchronize::is_at_safepoint(), "should be at safepoint");
a61af66fc99e Initial load duke parents: diff changeset	1970 assert(Thread::current() == (Thread*)VMThread::vm_thread(),
a61af66fc99e Initial load duke parents: diff changeset	1971 "should be in vm thread");
1387 0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 1311 diff changeset	1972
0 a61af66fc99e Initial load duke parents: diff changeset	1973 ParallelScavengeHeap* heap = gc_heap();
a61af66fc99e Initial load duke parents: diff changeset	1974 GCCause::Cause gc_cause = heap->gc_cause();
a61af66fc99e Initial load duke parents: diff changeset	1975 assert(!heap->is_gc_active(), "not reentrant");
a61af66fc99e Initial load duke parents: diff changeset	1976
a61af66fc99e Initial load duke parents: diff changeset	1977 PSAdaptiveSizePolicy* policy = heap->size_policy();
1387 0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 1311 diff changeset	1978 IsGCActiveMark mark;
0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 1311 diff changeset	1979
0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 1311 diff changeset	1980 if (ScavengeBeforeFullGC) {
0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 1311 diff changeset	1981 PSScavenge::invoke_no_policy();
0 a61af66fc99e Initial load duke parents: diff changeset	1982 }
1387 0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 1311 diff changeset	1983
0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 1311 diff changeset	1984 const bool clear_all_soft_refs =
0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 1311 diff changeset	1985 heap->collector_policy()->should_clear_all_soft_refs();
0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 1311 diff changeset	1986
0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 1311 diff changeset	1987 PSParallelCompact::invoke_no_policy(clear_all_soft_refs \|\|
0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 1311 diff changeset	1988 maximum_heap_compaction);
0 a61af66fc99e Initial load duke parents: diff changeset	1989 }
a61af66fc99e Initial load duke parents: diff changeset	1990
a61af66fc99e Initial load duke parents: diff changeset	1991 // This method contains no policy. You should probably
a61af66fc99e Initial load duke parents: diff changeset	1992 // be calling invoke() instead.
4913 ab4422d0ed59 7146343: PS invoke methods should indicate the type of gc done jcoomes parents: 4872 diff changeset	1993 bool PSParallelCompact::invoke_no_policy(bool maximum_heap_compaction) {
0 a61af66fc99e Initial load duke parents: diff changeset	1994 assert(SafepointSynchronize::is_at_safepoint(), "must be at a safepoint");
a61af66fc99e Initial load duke parents: diff changeset	1995 assert(ref_processor() != NULL, "Sanity");
a61af66fc99e Initial load duke parents: diff changeset	1996
139 c0492d52d55b 6539517: CR 6186200 should be extended to perm gen allocation to prevent spurious OOM's from perm gen apetrusenko parents: 0 diff changeset	1997 if (GC_locker::check_active_before_gc()) {
4913 ab4422d0ed59 7146343: PS invoke methods should indicate the type of gc done jcoomes parents: 4872 diff changeset	1998 return false;
0 a61af66fc99e Initial load duke parents: diff changeset	1999 }
a61af66fc99e Initial load duke parents: diff changeset	2000
a61af66fc99e Initial load duke parents: diff changeset	2001 TimeStamp marking_start;
a61af66fc99e Initial load duke parents: diff changeset	2002 TimeStamp compaction_start;
a61af66fc99e Initial load duke parents: diff changeset	2003 TimeStamp collection_exit;
a61af66fc99e Initial load duke parents: diff changeset	2004
a61af66fc99e Initial load duke parents: diff changeset	2005 ParallelScavengeHeap* heap = gc_heap();
a61af66fc99e Initial load duke parents: diff changeset	2006 GCCause::Cause gc_cause = heap->gc_cause();
a61af66fc99e Initial load duke parents: diff changeset	2007 PSYoungGen* young_gen = heap->young_gen();
a61af66fc99e Initial load duke parents: diff changeset	2008 PSOldGen* old_gen = heap->old_gen();
a61af66fc99e Initial load duke parents: diff changeset	2009 PSAdaptiveSizePolicy* size_policy = heap->size_policy();
a61af66fc99e Initial load duke parents: diff changeset	2010
1387 0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 1311 diff changeset	2011 // The scope of casr should end after code that can change
0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 1311 diff changeset	2012 // CollectorPolicy::_should_clear_all_soft_refs.
0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 1311 diff changeset	2013 ClearedAllSoftRefs casr(maximum_heap_compaction,
0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 1311 diff changeset	2014 heap->collector_policy());
0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 1311 diff changeset	2015
263 12eea04c8b06 6672698: mangle_unused_area() should not remangle the entire heap at each collection. jmasa parents: 210 diff changeset	2016 if (ZapUnusedHeapArea) {
12eea04c8b06 6672698: mangle_unused_area() should not remangle the entire heap at each collection. jmasa parents: 210 diff changeset	2017 // Save information needed to minimize mangling
12eea04c8b06 6672698: mangle_unused_area() should not remangle the entire heap at each collection. jmasa parents: 210 diff changeset	2018 heap->record_gen_tops_before_GC();
12eea04c8b06 6672698: mangle_unused_area() should not remangle the entire heap at each collection. jmasa parents: 210 diff changeset	2019 }
12eea04c8b06 6672698: mangle_unused_area() should not remangle the entire heap at each collection. jmasa parents: 210 diff changeset	2020
615 c6c601a0f2d6 6797870: Add -XX:+{HeapDump,PrintClassHistogram}{Before,After}FullGC ysr parents: 546 diff changeset	2021 heap->pre_full_gc_dump();
c6c601a0f2d6 6797870: Add -XX:+{HeapDump,PrintClassHistogram}{Before,After}FullGC ysr parents: 546 diff changeset	2022
0 a61af66fc99e Initial load duke parents: diff changeset	2023 _print_phases = PrintGCDetails && PrintParallelOldGCPhaseTimes;
a61af66fc99e Initial load duke parents: diff changeset	2024
a61af66fc99e Initial load duke parents: diff changeset	2025 // Make sure data structures are sane, make the heap parsable, and do other
a61af66fc99e Initial load duke parents: diff changeset	2026 // miscellaneous bookkeeping.
a61af66fc99e Initial load duke parents: diff changeset	2027 PreGCValues pre_gc_values;
a61af66fc99e Initial load duke parents: diff changeset	2028 pre_compact(&pre_gc_values);
a61af66fc99e Initial load duke parents: diff changeset	2029
210 05712c37c828 6676016: ParallelOldGC leaks memory jcoomes parents: 142 diff changeset	2030 // Get the compaction manager reserved for the VM thread.
05712c37c828 6676016: ParallelOldGC leaks memory jcoomes parents: 142 diff changeset	2031 ParCompactionManager* const vmthread_cm =
05712c37c828 6676016: ParallelOldGC leaks memory jcoomes parents: 142 diff changeset	2032 ParCompactionManager::manager_array(gc_task_manager()->workers());
05712c37c828 6676016: ParallelOldGC leaks memory jcoomes parents: 142 diff changeset	2033
0 a61af66fc99e Initial load duke parents: diff changeset	2034 // Place after pre_compact() where the number of invocations is incremented.
a61af66fc99e Initial load duke parents: diff changeset	2035 AdaptiveSizePolicyOutput(size_policy, heap->total_collections());
a61af66fc99e Initial load duke parents: diff changeset	2036
a61af66fc99e Initial load duke parents: diff changeset	2037 {
a61af66fc99e Initial load duke parents: diff changeset	2038 ResourceMark rm;
a61af66fc99e Initial load duke parents: diff changeset	2039 HandleMark hm;
a61af66fc99e Initial load duke parents: diff changeset	2040
4095 bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 3979 diff changeset	2041 // Set the number of GC threads to be used in this collection
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 3979 diff changeset	2042 gc_task_manager()->set_active_gang();
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 3979 diff changeset	2043 gc_task_manager()->task_idle_workers();
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 3979 diff changeset	2044 heap->set_par_threads(gc_task_manager()->active_workers());
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 3979 diff changeset	2045
0 a61af66fc99e Initial load duke parents: diff changeset	2046 gclog_or_tty->date_stamp(PrintGC && PrintGCDateStamps);
a61af66fc99e Initial load duke parents: diff changeset	2047 TraceCPUTime tcpu(PrintGCDetails, true, gclog_or_tty);
6064 9d679effd28c 7166894: Add gc cause to GC logging for all collectors brutisso parents: 4913 diff changeset	2048 TraceTime t1(GCCauseString("Full GC", gc_cause), PrintGC, !PrintGCDetails, gclog_or_tty);
0 a61af66fc99e Initial load duke parents: diff changeset	2049 TraceCollectorStats tcs(counters());
3356 78542e2b5e35 7036199: Adding a notification to the implementation of GarbageCollectorMXBeans fparain parents: 3251 diff changeset	2050 TraceMemoryManagerStats tms(true /* Full GC */,gc_cause);
0 a61af66fc99e Initial load duke parents: diff changeset	2051
a61af66fc99e Initial load duke parents: diff changeset	2052 if (TraceGen1Time) accumulated_time()->start();
a61af66fc99e Initial load duke parents: diff changeset	2053
a61af66fc99e Initial load duke parents: diff changeset	2054 // Let the size policy know we're starting
a61af66fc99e Initial load duke parents: diff changeset	2055 size_policy->major_collection_begin();
a61af66fc99e Initial load duke parents: diff changeset	2056
a61af66fc99e Initial load duke parents: diff changeset	2057 CodeCache::gc_prologue();
a61af66fc99e Initial load duke parents: diff changeset	2058 Threads::gc_prologue();
a61af66fc99e Initial load duke parents: diff changeset	2059
a61af66fc99e Initial load duke parents: diff changeset	2060 COMPILER2_PRESENT(DerivedPointerTable::clear());
a61af66fc99e Initial load duke parents: diff changeset	2061
3979 4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3915 diff changeset	2062 ref_processor()->enable_discovery(true /verify_disabled/, true /verify_no_refs/);
457 27a80744a83b 6778647: snap(), snap_policy() should be renamed setup(), setup_policy() ysr parents: 453 diff changeset	2063 ref_processor()->setup_policy(maximum_heap_compaction);
0 a61af66fc99e Initial load duke parents: diff changeset	2064
a61af66fc99e Initial load duke parents: diff changeset	2065 bool marked_for_unloading = false;
a61af66fc99e Initial load duke parents: diff changeset	2066
a61af66fc99e Initial load duke parents: diff changeset	2067 marking_start.update();
210 05712c37c828 6676016: ParallelOldGC leaks memory jcoomes parents: 142 diff changeset	2068 marking_phase(vmthread_cm, maximum_heap_compaction);
0 a61af66fc99e Initial load duke parents: diff changeset	2069
6064 9d679effd28c 7166894: Add gc cause to GC logging for all collectors brutisso parents: 4913 diff changeset	2070 bool max_on_system_gc = UseMaximumCompactionOnSystemGC
9d679effd28c 7166894: Add gc cause to GC logging for all collectors brutisso parents: 4913 diff changeset	2071 && gc_cause == GCCause::_java_lang_system_gc;
210 05712c37c828 6676016: ParallelOldGC leaks memory jcoomes parents: 142 diff changeset	2072 summary_phase(vmthread_cm, maximum_heap_compaction \|\| max_on_system_gc);
0 a61af66fc99e Initial load duke parents: diff changeset	2073
a61af66fc99e Initial load duke parents: diff changeset	2074 COMPILER2_PRESENT(assert(DerivedPointerTable::is_active(), "Sanity"));
a61af66fc99e Initial load duke parents: diff changeset	2075 COMPILER2_PRESENT(DerivedPointerTable::set_active(false));
a61af66fc99e Initial load duke parents: diff changeset	2076
a61af66fc99e Initial load duke parents: diff changeset	2077 // adjust_roots() updates Universe::_intArrayKlassObj which is
a61af66fc99e Initial load duke parents: diff changeset	2078 // needed by the compaction for filling holes in the dense prefix.
a61af66fc99e Initial load duke parents: diff changeset	2079 adjust_roots();
a61af66fc99e Initial load duke parents: diff changeset	2080
a61af66fc99e Initial load duke parents: diff changeset	2081 compaction_start.update();
3251 eda9eb483d29 6841742: par compact - remove unused/unsupported options jcoomes parents: 2369 diff changeset	2082 compact();
0 a61af66fc99e Initial load duke parents: diff changeset	2083
a61af66fc99e Initial load duke parents: diff changeset	2084 // Reset the mark bitmap, summary data, and do other bookkeeping. Must be
a61af66fc99e Initial load duke parents: diff changeset	2085 // done before resizing.
a61af66fc99e Initial load duke parents: diff changeset	2086 post_compact();
a61af66fc99e Initial load duke parents: diff changeset	2087
a61af66fc99e Initial load duke parents: diff changeset	2088 // Let the size policy know we're done
a61af66fc99e Initial load duke parents: diff changeset	2089 size_policy->major_collection_end(old_gen->used_in_bytes(), gc_cause);
a61af66fc99e Initial load duke parents: diff changeset	2090
a61af66fc99e Initial load duke parents: diff changeset	2091 if (UseAdaptiveSizePolicy) {
a61af66fc99e Initial load duke parents: diff changeset	2092 if (PrintAdaptiveSizePolicy) {
a61af66fc99e Initial load duke parents: diff changeset	2093 gclog_or_tty->print("AdaptiveSizeStart: ");
a61af66fc99e Initial load duke parents: diff changeset	2094 gclog_or_tty->stamp();
a61af66fc99e Initial load duke parents: diff changeset	2095 gclog_or_tty->print_cr(" collection: %d ",
a61af66fc99e Initial load duke parents: diff changeset	2096 heap->total_collections());
a61af66fc99e Initial load duke parents: diff changeset	2097 if (Verbose) {
6725 da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	2098 gclog_or_tty->print("old_gen_capacity: %d young_gen_capacity: %d",
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	2099 old_gen->capacity_in_bytes(), young_gen->capacity_in_bytes());
0 a61af66fc99e Initial load duke parents: diff changeset	2100 }
a61af66fc99e Initial load duke parents: diff changeset	2101 }
a61af66fc99e Initial load duke parents: diff changeset	2102
a61af66fc99e Initial load duke parents: diff changeset	2103 // Don't check if the size_policy is ready here. Let
a61af66fc99e Initial load duke parents: diff changeset	2104 // the size_policy check that internally.
a61af66fc99e Initial load duke parents: diff changeset	2105 if (UseAdaptiveGenerationSizePolicyAtMajorCollection &&
a61af66fc99e Initial load duke parents: diff changeset	2106 ((gc_cause != GCCause::_java_lang_system_gc) \|\|
a61af66fc99e Initial load duke parents: diff changeset	2107 UseAdaptiveSizePolicyWithSystemGC)) {
a61af66fc99e Initial load duke parents: diff changeset	2108 // Calculate optimal free space amounts
a61af66fc99e Initial load duke parents: diff changeset	2109 assert(young_gen->max_size() >
a61af66fc99e Initial load duke parents: diff changeset	2110 young_gen->from_space()->capacity_in_bytes() +
a61af66fc99e Initial load duke parents: diff changeset	2111 young_gen->to_space()->capacity_in_bytes(),
a61af66fc99e Initial load duke parents: diff changeset	2112 "Sizes of space in young gen are out-of-bounds");
10288 eba99d16dc6f 8007763: Refactoring: split up compute_generation_free_space() into two functions for class PSAdaptiveSizePolicy tamao parents: 10285 diff changeset	2113
eba99d16dc6f 8007763: Refactoring: split up compute_generation_free_space() into two functions for class PSAdaptiveSizePolicy tamao parents: 10285 diff changeset	2114 size_t young_live = young_gen->used_in_bytes();
eba99d16dc6f 8007763: Refactoring: split up compute_generation_free_space() into two functions for class PSAdaptiveSizePolicy tamao parents: 10285 diff changeset	2115 size_t eden_live = young_gen->eden_space()->used_in_bytes();
eba99d16dc6f 8007763: Refactoring: split up compute_generation_free_space() into two functions for class PSAdaptiveSizePolicy tamao parents: 10285 diff changeset	2116 size_t old_live = old_gen->used_in_bytes();
eba99d16dc6f 8007763: Refactoring: split up compute_generation_free_space() into two functions for class PSAdaptiveSizePolicy tamao parents: 10285 diff changeset	2117 size_t cur_eden = young_gen->eden_space()->capacity_in_bytes();
eba99d16dc6f 8007763: Refactoring: split up compute_generation_free_space() into two functions for class PSAdaptiveSizePolicy tamao parents: 10285 diff changeset	2118 size_t max_old_gen_size = old_gen->max_gen_size();
0 a61af66fc99e Initial load duke parents: diff changeset	2119 size_t max_eden_size = young_gen->max_size() -
a61af66fc99e Initial load duke parents: diff changeset	2120 young_gen->from_space()->capacity_in_bytes() -
a61af66fc99e Initial load duke parents: diff changeset	2121 young_gen->to_space()->capacity_in_bytes();
10288 eba99d16dc6f 8007763: Refactoring: split up compute_generation_free_space() into two functions for class PSAdaptiveSizePolicy tamao parents: 10285 diff changeset	2122
eba99d16dc6f 8007763: Refactoring: split up compute_generation_free_space() into two functions for class PSAdaptiveSizePolicy tamao parents: 10285 diff changeset	2123 // Used for diagnostics
eba99d16dc6f 8007763: Refactoring: split up compute_generation_free_space() into two functions for class PSAdaptiveSizePolicy tamao parents: 10285 diff changeset	2124 size_policy->clear_generation_free_space_flags();
eba99d16dc6f 8007763: Refactoring: split up compute_generation_free_space() into two functions for class PSAdaptiveSizePolicy tamao parents: 10285 diff changeset	2125
10359 14d3f71f831d 8007762: Rename a bunch of methods in size policy across collectors tamao parents: 10329 diff changeset	2126 size_policy->compute_generations_free_space(young_live,
14d3f71f831d 8007762: Rename a bunch of methods in size policy across collectors tamao parents: 10329 diff changeset	2127 eden_live,
14d3f71f831d 8007762: Rename a bunch of methods in size policy across collectors tamao parents: 10329 diff changeset	2128 old_live,
14d3f71f831d 8007762: Rename a bunch of methods in size policy across collectors tamao parents: 10329 diff changeset	2129 cur_eden,
14d3f71f831d 8007762: Rename a bunch of methods in size policy across collectors tamao parents: 10329 diff changeset	2130 max_old_gen_size,
14d3f71f831d 8007762: Rename a bunch of methods in size policy across collectors tamao parents: 10329 diff changeset	2131 max_eden_size,
14d3f71f831d 8007762: Rename a bunch of methods in size policy across collectors tamao parents: 10329 diff changeset	2132 true /* full gc*/);
10288 eba99d16dc6f 8007763: Refactoring: split up compute_generation_free_space() into two functions for class PSAdaptiveSizePolicy tamao parents: 10285 diff changeset	2133
eba99d16dc6f 8007763: Refactoring: split up compute_generation_free_space() into two functions for class PSAdaptiveSizePolicy tamao parents: 10285 diff changeset	2134 size_policy->check_gc_overhead_limit(young_live,
eba99d16dc6f 8007763: Refactoring: split up compute_generation_free_space() into two functions for class PSAdaptiveSizePolicy tamao parents: 10285 diff changeset	2135 eden_live,
eba99d16dc6f 8007763: Refactoring: split up compute_generation_free_space() into two functions for class PSAdaptiveSizePolicy tamao parents: 10285 diff changeset	2136 max_old_gen_size,
eba99d16dc6f 8007763: Refactoring: split up compute_generation_free_space() into two functions for class PSAdaptiveSizePolicy tamao parents: 10285 diff changeset	2137 max_eden_size,
eba99d16dc6f 8007763: Refactoring: split up compute_generation_free_space() into two functions for class PSAdaptiveSizePolicy tamao parents: 10285 diff changeset	2138 true /* full gc*/,
eba99d16dc6f 8007763: Refactoring: split up compute_generation_free_space() into two functions for class PSAdaptiveSizePolicy tamao parents: 10285 diff changeset	2139 gc_cause,
eba99d16dc6f 8007763: Refactoring: split up compute_generation_free_space() into two functions for class PSAdaptiveSizePolicy tamao parents: 10285 diff changeset	2140 heap->collector_policy());
eba99d16dc6f 8007763: Refactoring: split up compute_generation_free_space() into two functions for class PSAdaptiveSizePolicy tamao parents: 10285 diff changeset	2141
eba99d16dc6f 8007763: Refactoring: split up compute_generation_free_space() into two functions for class PSAdaptiveSizePolicy tamao parents: 10285 diff changeset	2142 size_policy->decay_supplemental_growth(true /* full gc*/);
263 12eea04c8b06 6672698: mangle_unused_area() should not remangle the entire heap at each collection. jmasa parents: 210 diff changeset	2143
12eea04c8b06 6672698: mangle_unused_area() should not remangle the entire heap at each collection. jmasa parents: 210 diff changeset	2144 heap->resize_old_gen(
12eea04c8b06 6672698: mangle_unused_area() should not remangle the entire heap at each collection. jmasa parents: 210 diff changeset	2145 size_policy->calculated_old_free_size_in_bytes());
0 a61af66fc99e Initial load duke parents: diff changeset	2146
a61af66fc99e Initial load duke parents: diff changeset	2147 // Don't resize the young generation at an major collection. A
a61af66fc99e Initial load duke parents: diff changeset	2148 // desired young generation size may have been calculated but
a61af66fc99e Initial load duke parents: diff changeset	2149 // resizing the young generation complicates the code because the
a61af66fc99e Initial load duke parents: diff changeset	2150 // resizing of the old generation may have moved the boundary
a61af66fc99e Initial load duke parents: diff changeset	2151 // between the young generation and the old generation. Let the
a61af66fc99e Initial load duke parents: diff changeset	2152 // young generation resizing happen at the minor collections.
a61af66fc99e Initial load duke parents: diff changeset	2153 }
a61af66fc99e Initial load duke parents: diff changeset	2154 if (PrintAdaptiveSizePolicy) {
a61af66fc99e Initial load duke parents: diff changeset	2155 gclog_or_tty->print_cr("AdaptiveSizeStop: collection: %d ",
a61af66fc99e Initial load duke parents: diff changeset	2156 heap->total_collections());
a61af66fc99e Initial load duke parents: diff changeset	2157 }
a61af66fc99e Initial load duke parents: diff changeset	2158 }
a61af66fc99e Initial load duke parents: diff changeset	2159
a61af66fc99e Initial load duke parents: diff changeset	2160 if (UsePerfData) {
a61af66fc99e Initial load duke parents: diff changeset	2161 PSGCAdaptivePolicyCounters* const counters = heap->gc_policy_counters();
a61af66fc99e Initial load duke parents: diff changeset	2162 counters->update_counters();
a61af66fc99e Initial load duke parents: diff changeset	2163 counters->update_old_capacity(old_gen->capacity_in_bytes());
a61af66fc99e Initial load duke parents: diff changeset	2164 counters->update_young_capacity(young_gen->capacity_in_bytes());
a61af66fc99e Initial load duke parents: diff changeset	2165 }
a61af66fc99e Initial load duke parents: diff changeset	2166
a61af66fc99e Initial load duke parents: diff changeset	2167 heap->resize_all_tlabs();
a61af66fc99e Initial load duke parents: diff changeset	2168
6725 da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	2169 // Resize the metaspace capactiy after a collection
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	2170 MetaspaceGC::compute_new_size();
0 a61af66fc99e Initial load duke parents: diff changeset	2171
a61af66fc99e Initial load duke parents: diff changeset	2172 if (TraceGen1Time) accumulated_time()->stop();
a61af66fc99e Initial load duke parents: diff changeset	2173
a61af66fc99e Initial load duke parents: diff changeset	2174 if (PrintGC) {
a61af66fc99e Initial load duke parents: diff changeset	2175 if (PrintGCDetails) {
a61af66fc99e Initial load duke parents: diff changeset	2176 // No GC timestamp here. This is after GC so it would be confusing.
a61af66fc99e Initial load duke parents: diff changeset	2177 young_gen->print_used_change(pre_gc_values.young_gen_used());
a61af66fc99e Initial load duke parents: diff changeset	2178 old_gen->print_used_change(pre_gc_values.old_gen_used());
a61af66fc99e Initial load duke parents: diff changeset	2179 heap->print_heap_change(pre_gc_values.heap_used());
6725 da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	2180 MetaspaceAux::print_metaspace_change(pre_gc_values.metadata_used());
0 a61af66fc99e Initial load duke parents: diff changeset	2181 } else {
a61af66fc99e Initial load duke parents: diff changeset	2182 heap->print_heap_change(pre_gc_values.heap_used());
a61af66fc99e Initial load duke parents: diff changeset	2183 }
a61af66fc99e Initial load duke parents: diff changeset	2184 }
a61af66fc99e Initial load duke parents: diff changeset	2185
a61af66fc99e Initial load duke parents: diff changeset	2186 // Track memory usage and detect low memory
a61af66fc99e Initial load duke parents: diff changeset	2187 MemoryService::track_memory_usage();
a61af66fc99e Initial load duke parents: diff changeset	2188 heap->update_counters();
4095 bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 3979 diff changeset	2189 gc_task_manager()->release_idle_workers();
0 a61af66fc99e Initial load duke parents: diff changeset	2190 }
a61af66fc99e Initial load duke parents: diff changeset	2191
1836 894b1d7c7e01 6423256: GC stacks should use a better data structure jcoomes parents: 1833 diff changeset	2192 #ifdef ASSERT
894b1d7c7e01 6423256: GC stacks should use a better data structure jcoomes parents: 1833 diff changeset	2193 for (size_t i = 0; i < ParallelGCThreads + 1; ++i) {
894b1d7c7e01 6423256: GC stacks should use a better data structure jcoomes parents: 1833 diff changeset	2194 ParCompactionManager* const cm =
894b1d7c7e01 6423256: GC stacks should use a better data structure jcoomes parents: 1833 diff changeset	2195 ParCompactionManager::manager_array(int(i));
894b1d7c7e01 6423256: GC stacks should use a better data structure jcoomes parents: 1833 diff changeset	2196 assert(cm->marking_stack()->is_empty(), "should be empty");
4095 bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 3979 diff changeset	2197 assert(ParCompactionManager::region_list(int(i))->is_empty(), "should be empty");
1836 894b1d7c7e01 6423256: GC stacks should use a better data structure jcoomes parents: 1833 diff changeset	2198 }
894b1d7c7e01 6423256: GC stacks should use a better data structure jcoomes parents: 1833 diff changeset	2199 #endif // ASSERT
894b1d7c7e01 6423256: GC stacks should use a better data structure jcoomes parents: 1833 diff changeset	2200
0 a61af66fc99e Initial load duke parents: diff changeset	2201 if (VerifyAfterGC && heap->total_collections() >= VerifyGCStartAt) {
a61af66fc99e Initial load duke parents: diff changeset	2202 HandleMark hm; // Discard invalid handles created during verification
10186 b06ac540229e 8013132: Add a flag to turn off the output of the verbose verification code stefank parents: 10183 diff changeset	2203 Universe::verify(" VerifyAfterGC:");
0 a61af66fc99e Initial load duke parents: diff changeset	2204 }
a61af66fc99e Initial load duke parents: diff changeset	2205
a61af66fc99e Initial load duke parents: diff changeset	2206 // Re-verify object start arrays
a61af66fc99e Initial load duke parents: diff changeset	2207 if (VerifyObjectStartArray &&
a61af66fc99e Initial load duke parents: diff changeset	2208 VerifyAfterGC) {
a61af66fc99e Initial load duke parents: diff changeset	2209 old_gen->verify_object_start_array();
a61af66fc99e Initial load duke parents: diff changeset	2210 }
a61af66fc99e Initial load duke parents: diff changeset	2211
263 12eea04c8b06 6672698: mangle_unused_area() should not remangle the entire heap at each collection. jmasa parents: 210 diff changeset	2212 if (ZapUnusedHeapArea) {
12eea04c8b06 6672698: mangle_unused_area() should not remangle the entire heap at each collection. jmasa parents: 210 diff changeset	2213 old_gen->object_space()->check_mangled_unused_area_complete();
12eea04c8b06 6672698: mangle_unused_area() should not remangle the entire heap at each collection. jmasa parents: 210 diff changeset	2214 }
12eea04c8b06 6672698: mangle_unused_area() should not remangle the entire heap at each collection. jmasa parents: 210 diff changeset	2215
0 a61af66fc99e Initial load duke parents: diff changeset	2216 NOT_PRODUCT(ref_processor()->verify_no_references_recorded());
a61af66fc99e Initial load duke parents: diff changeset	2217
a61af66fc99e Initial load duke parents: diff changeset	2218 collection_exit.update();
a61af66fc99e Initial load duke parents: diff changeset	2219
4872 aa3d708d67c4 7141200: log some interesting information in ring buffers for crashes never parents: 4712 diff changeset	2220 heap->print_heap_after_gc();
0 a61af66fc99e Initial load duke parents: diff changeset	2221 if (PrintGCTaskTimeStamps) {
a61af66fc99e Initial load duke parents: diff changeset	2222 gclog_or_tty->print_cr("VM-Thread " INT64_FORMAT " " INT64_FORMAT " "
a61af66fc99e Initial load duke parents: diff changeset	2223 INT64_FORMAT,
a61af66fc99e Initial load duke parents: diff changeset	2224 marking_start.ticks(), compaction_start.ticks(),
a61af66fc99e Initial load duke parents: diff changeset	2225 collection_exit.ticks());
a61af66fc99e Initial load duke parents: diff changeset	2226 gc_task_manager()->print_task_time_stamps();
a61af66fc99e Initial load duke parents: diff changeset	2227 }
546 05c6d52fa7a9 6690928: Use spinning in combination with yields for workstealing termination. jmasa parents: 496 diff changeset	2228
615 c6c601a0f2d6 6797870: Add -XX:+{HeapDump,PrintClassHistogram}{Before,After}FullGC ysr parents: 546 diff changeset	2229 heap->post_full_gc_dump();
c6c601a0f2d6 6797870: Add -XX:+{HeapDump,PrintClassHistogram}{Before,After}FullGC ysr parents: 546 diff changeset	2230
546 05c6d52fa7a9 6690928: Use spinning in combination with yields for workstealing termination. jmasa parents: 496 diff changeset	2231 #ifdef TRACESPINNING
05c6d52fa7a9 6690928: Use spinning in combination with yields for workstealing termination. jmasa parents: 496 diff changeset	2232 ParallelTaskTerminator::print_termination_counts();
05c6d52fa7a9 6690928: Use spinning in combination with yields for workstealing termination. jmasa parents: 496 diff changeset	2233 #endif
4913 ab4422d0ed59 7146343: PS invoke methods should indicate the type of gc done jcoomes parents: 4872 diff changeset	2234
ab4422d0ed59 7146343: PS invoke methods should indicate the type of gc done jcoomes parents: 4872 diff changeset	2235 return true;
0 a61af66fc99e Initial load duke parents: diff changeset	2236 }
a61af66fc99e Initial load duke parents: diff changeset	2237
a61af66fc99e Initial load duke parents: diff changeset	2238 bool PSParallelCompact::absorb_live_data_from_eden(PSAdaptiveSizePolicy* size_policy,
a61af66fc99e Initial load duke parents: diff changeset	2239 PSYoungGen* young_gen,
a61af66fc99e Initial load duke parents: diff changeset	2240 PSOldGen* old_gen) {
a61af66fc99e Initial load duke parents: diff changeset	2241 MutableSpace* const eden_space = young_gen->eden_space();
a61af66fc99e Initial load duke parents: diff changeset	2242 assert(!eden_space->is_empty(), "eden must be non-empty");
a61af66fc99e Initial load duke parents: diff changeset	2243 assert(young_gen->virtual_space()->alignment() ==
a61af66fc99e Initial load duke parents: diff changeset	2244 old_gen->virtual_space()->alignment(), "alignments do not match");
a61af66fc99e Initial load duke parents: diff changeset	2245
a61af66fc99e Initial load duke parents: diff changeset	2246 if (!(UseAdaptiveSizePolicy && UseAdaptiveGCBoundary)) {
a61af66fc99e Initial load duke parents: diff changeset	2247 return false;
a61af66fc99e Initial load duke parents: diff changeset	2248 }
a61af66fc99e Initial load duke parents: diff changeset	2249
a61af66fc99e Initial load duke parents: diff changeset	2250 // Both generations must be completely committed.
a61af66fc99e Initial load duke parents: diff changeset	2251 if (young_gen->virtual_space()->uncommitted_size() != 0) {
a61af66fc99e Initial load duke parents: diff changeset	2252 return false;
a61af66fc99e Initial load duke parents: diff changeset	2253 }
a61af66fc99e Initial load duke parents: diff changeset	2254 if (old_gen->virtual_space()->uncommitted_size() != 0) {
a61af66fc99e Initial load duke parents: diff changeset	2255 return false;
a61af66fc99e Initial load duke parents: diff changeset	2256 }
a61af66fc99e Initial load duke parents: diff changeset	2257
a61af66fc99e Initial load duke parents: diff changeset	2258 // Figure out how much to take from eden. Include the average amount promoted
a61af66fc99e Initial load duke parents: diff changeset	2259 // in the total; otherwise the next young gen GC will simply bail out to a
a61af66fc99e Initial load duke parents: diff changeset	2260 // full GC.
a61af66fc99e Initial load duke parents: diff changeset	2261 const size_t alignment = old_gen->virtual_space()->alignment();
a61af66fc99e Initial load duke parents: diff changeset	2262 const size_t eden_used = eden_space->used_in_bytes();
a61af66fc99e Initial load duke parents: diff changeset	2263 const size_t promoted = (size_t)size_policy->avg_promoted()->padded_average();
a61af66fc99e Initial load duke parents: diff changeset	2264 const size_t absorb_size = align_size_up(eden_used + promoted, alignment);
a61af66fc99e Initial load duke parents: diff changeset	2265 const size_t eden_capacity = eden_space->capacity_in_bytes();
a61af66fc99e Initial load duke parents: diff changeset	2266
a61af66fc99e Initial load duke parents: diff changeset	2267 if (absorb_size >= eden_capacity) {
a61af66fc99e Initial load duke parents: diff changeset	2268 return false; // Must leave some space in eden.
a61af66fc99e Initial load duke parents: diff changeset	2269 }
a61af66fc99e Initial load duke parents: diff changeset	2270
a61af66fc99e Initial load duke parents: diff changeset	2271 const size_t new_young_size = young_gen->capacity_in_bytes() - absorb_size;
a61af66fc99e Initial load duke parents: diff changeset	2272 if (new_young_size < young_gen->min_gen_size()) {
a61af66fc99e Initial load duke parents: diff changeset	2273 return false; // Respect young gen minimum size.
a61af66fc99e Initial load duke parents: diff changeset	2274 }
a61af66fc99e Initial load duke parents: diff changeset	2275
a61af66fc99e Initial load duke parents: diff changeset	2276 if (TraceAdaptiveGCBoundary && Verbose) {
a61af66fc99e Initial load duke parents: diff changeset	2277 gclog_or_tty->print(" absorbing " SIZE_FORMAT "K: "
a61af66fc99e Initial load duke parents: diff changeset	2278 "eden " SIZE_FORMAT "K->" SIZE_FORMAT "K "
a61af66fc99e Initial load duke parents: diff changeset	2279 "from " SIZE_FORMAT "K, to " SIZE_FORMAT "K "
a61af66fc99e Initial load duke parents: diff changeset	2280 "young_gen " SIZE_FORMAT "K->" SIZE_FORMAT "K ",
a61af66fc99e Initial load duke parents: diff changeset	2281 absorb_size / K,
a61af66fc99e Initial load duke parents: diff changeset	2282 eden_capacity / K, (eden_capacity - absorb_size) / K,
a61af66fc99e Initial load duke parents: diff changeset	2283 young_gen->from_space()->used_in_bytes() / K,
a61af66fc99e Initial load duke parents: diff changeset	2284 young_gen->to_space()->used_in_bytes() / K,
a61af66fc99e Initial load duke parents: diff changeset	2285 young_gen->capacity_in_bytes() / K, new_young_size / K);
a61af66fc99e Initial load duke parents: diff changeset	2286 }
a61af66fc99e Initial load duke parents: diff changeset	2287
a61af66fc99e Initial load duke parents: diff changeset	2288 // Fill the unused part of the old gen.
a61af66fc99e Initial load duke parents: diff changeset	2289 MutableSpace* const old_space = old_gen->object_space();
481 7d7a7c599c17 6578152: fill_region_with_object has usability and safety issues jcoomes parents: 457 diff changeset	2290 HeapWord* const unused_start = old_space->top();
7d7a7c599c17 6578152: fill_region_with_object has usability and safety issues jcoomes parents: 457 diff changeset	2291 size_t const unused_words = pointer_delta(old_space->end(), unused_start);
7d7a7c599c17 6578152: fill_region_with_object has usability and safety issues jcoomes parents: 457 diff changeset	2292
7d7a7c599c17 6578152: fill_region_with_object has usability and safety issues jcoomes parents: 457 diff changeset	2293 if (unused_words > 0) {
7d7a7c599c17 6578152: fill_region_with_object has usability and safety issues jcoomes parents: 457 diff changeset	2294 if (unused_words < CollectedHeap::min_fill_size()) {
7d7a7c599c17 6578152: fill_region_with_object has usability and safety issues jcoomes parents: 457 diff changeset	2295 return false; // If the old gen cannot be filled, must give up.
7d7a7c599c17 6578152: fill_region_with_object has usability and safety issues jcoomes parents: 457 diff changeset	2296 }
7d7a7c599c17 6578152: fill_region_with_object has usability and safety issues jcoomes parents: 457 diff changeset	2297 CollectedHeap::fill_with_objects(unused_start, unused_words);
0 a61af66fc99e Initial load duke parents: diff changeset	2298 }
a61af66fc99e Initial load duke parents: diff changeset	2299
a61af66fc99e Initial load duke parents: diff changeset	2300 // Take the live data from eden and set both top and end in the old gen to
a61af66fc99e Initial load duke parents: diff changeset	2301 // eden top. (Need to set end because reset_after_change() mangles the region
a61af66fc99e Initial load duke parents: diff changeset	2302 // from end to virtual_space->high() in debug builds).
a61af66fc99e Initial load duke parents: diff changeset	2303 HeapWord* const new_top = eden_space->top();
a61af66fc99e Initial load duke parents: diff changeset	2304 old_gen->virtual_space()->expand_into(young_gen->virtual_space(),
a61af66fc99e Initial load duke parents: diff changeset	2305 absorb_size);
a61af66fc99e Initial load duke parents: diff changeset	2306 young_gen->reset_after_change();
a61af66fc99e Initial load duke parents: diff changeset	2307 old_space->set_top(new_top);
a61af66fc99e Initial load duke parents: diff changeset	2308 old_space->set_end(new_top);
a61af66fc99e Initial load duke parents: diff changeset	2309 old_gen->reset_after_change();
a61af66fc99e Initial load duke parents: diff changeset	2310
a61af66fc99e Initial load duke parents: diff changeset	2311 // Update the object start array for the filler object and the data from eden.
a61af66fc99e Initial load duke parents: diff changeset	2312 ObjectStartArray* const start_array = old_gen->start_array();
481 7d7a7c599c17 6578152: fill_region_with_object has usability and safety issues jcoomes parents: 457 diff changeset	2313 for (HeapWord* p = unused_start; p < new_top; p += oop(p)->size()) {
7d7a7c599c17 6578152: fill_region_with_object has usability and safety issues jcoomes parents: 457 diff changeset	2314 start_array->allocate_block(p);
0 a61af66fc99e Initial load duke parents: diff changeset	2315 }
a61af66fc99e Initial load duke parents: diff changeset	2316
a61af66fc99e Initial load duke parents: diff changeset	2317 // Could update the promoted average here, but it is not typically updated at
a61af66fc99e Initial load duke parents: diff changeset	2318 // full GCs and the value to use is unclear. Something like
a61af66fc99e Initial load duke parents: diff changeset	2319 //
a61af66fc99e Initial load duke parents: diff changeset	2320 // cur_promoted_avg + absorb_size / number_of_scavenges_since_last_full_gc.
a61af66fc99e Initial load duke parents: diff changeset	2321
a61af66fc99e Initial load duke parents: diff changeset	2322 size_policy->set_bytes_absorbed_from_eden(absorb_size);
a61af66fc99e Initial load duke parents: diff changeset	2323 return true;
a61af66fc99e Initial load duke parents: diff changeset	2324 }
a61af66fc99e Initial load duke parents: diff changeset	2325
a61af66fc99e Initial load duke parents: diff changeset	2326 GCTaskManager* const PSParallelCompact::gc_task_manager() {
a61af66fc99e Initial load duke parents: diff changeset	2327 assert(ParallelScavengeHeap::gc_task_manager() != NULL,
a61af66fc99e Initial load duke parents: diff changeset	2328 "shouldn't return NULL");
a61af66fc99e Initial load duke parents: diff changeset	2329 return ParallelScavengeHeap::gc_task_manager();
a61af66fc99e Initial load duke parents: diff changeset	2330 }
a61af66fc99e Initial load duke parents: diff changeset	2331
a61af66fc99e Initial load duke parents: diff changeset	2332 void PSParallelCompact::marking_phase(ParCompactionManager* cm,
a61af66fc99e Initial load duke parents: diff changeset	2333 bool maximum_heap_compaction) {
a61af66fc99e Initial load duke parents: diff changeset	2334 // Recursively traverse all live objects and mark them
a61af66fc99e Initial load duke parents: diff changeset	2335 TraceTime tm("marking phase", print_phases(), true, gclog_or_tty);
a61af66fc99e Initial load duke parents: diff changeset	2336
a61af66fc99e Initial load duke parents: diff changeset	2337 ParallelScavengeHeap* heap = gc_heap();
a61af66fc99e Initial load duke parents: diff changeset	2338 uint parallel_gc_threads = heap->gc_task_manager()->workers();
4095 bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 3979 diff changeset	2339 uint active_gc_threads = heap->gc_task_manager()->active_workers();
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2340 TaskQueueSetSuper* qset = ParCompactionManager::region_array();
4095 bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 3979 diff changeset	2341 ParallelTaskTerminator terminator(active_gc_threads, qset);
0 a61af66fc99e Initial load duke parents: diff changeset	2342
a61af66fc99e Initial load duke parents: diff changeset	2343 PSParallelCompact::MarkAndPushClosure mark_and_push_closure(cm);
a61af66fc99e Initial load duke parents: diff changeset	2344 PSParallelCompact::FollowStackClosure follow_stack_closure(cm);
a61af66fc99e Initial load duke parents: diff changeset	2345
6725 da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	2346 // Need new claim bits before marking starts.
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	2347 ClassLoaderDataGraph::clear_claimed_marks();
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	2348
0 a61af66fc99e Initial load duke parents: diff changeset	2349 {
a61af66fc99e Initial load duke parents: diff changeset	2350 TraceTime tm_m("par mark", print_phases(), true, gclog_or_tty);
989 148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 696 diff changeset	2351 ParallelScavengeHeap::ParStrongRootsScope psrs;
0 a61af66fc99e Initial load duke parents: diff changeset	2352
a61af66fc99e Initial load duke parents: diff changeset	2353 GCTaskQueue* q = GCTaskQueue::create();
a61af66fc99e Initial load duke parents: diff changeset	2354
a61af66fc99e Initial load duke parents: diff changeset	2355 q->enqueue(new MarkFromRootsTask(MarkFromRootsTask::universe));
a61af66fc99e Initial load duke parents: diff changeset	2356 q->enqueue(new MarkFromRootsTask(MarkFromRootsTask::jni_handles));
a61af66fc99e Initial load duke parents: diff changeset	2357 // We scan the thread roots in parallel
a61af66fc99e Initial load duke parents: diff changeset	2358 Threads::create_thread_roots_marking_tasks(q);
a61af66fc99e Initial load duke parents: diff changeset	2359 q->enqueue(new MarkFromRootsTask(MarkFromRootsTask::object_synchronizer));
a61af66fc99e Initial load duke parents: diff changeset	2360 q->enqueue(new MarkFromRootsTask(MarkFromRootsTask::flat_profiler));
a61af66fc99e Initial load duke parents: diff changeset	2361 q->enqueue(new MarkFromRootsTask(MarkFromRootsTask::management));
a61af66fc99e Initial load duke parents: diff changeset	2362 q->enqueue(new MarkFromRootsTask(MarkFromRootsTask::system_dictionary));
10361 eda078b01c65 8015268: NPG: 2.5% regression in young GC times on CRM Sales Opty stefank parents: 10359 diff changeset	2363 q->enqueue(new MarkFromRootsTask(MarkFromRootsTask::class_loader_data));
0 a61af66fc99e Initial load duke parents: diff changeset	2364 q->enqueue(new MarkFromRootsTask(MarkFromRootsTask::jvmti));
989 148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 696 diff changeset	2365 q->enqueue(new MarkFromRootsTask(MarkFromRootsTask::code_cache));
0 a61af66fc99e Initial load duke parents: diff changeset	2366
4095 bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 3979 diff changeset	2367 if (active_gc_threads > 1) {
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 3979 diff changeset	2368 for (uint j = 0; j < active_gc_threads; j++) {
0 a61af66fc99e Initial load duke parents: diff changeset	2369 q->enqueue(new StealMarkingTask(&terminator));
a61af66fc99e Initial load duke parents: diff changeset	2370 }
a61af66fc99e Initial load duke parents: diff changeset	2371 }
a61af66fc99e Initial load duke parents: diff changeset	2372
4095 bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 3979 diff changeset	2373 gc_task_manager()->execute_and_wait(q);
0 a61af66fc99e Initial load duke parents: diff changeset	2374 }
a61af66fc99e Initial load duke parents: diff changeset	2375
a61af66fc99e Initial load duke parents: diff changeset	2376 // Process reference objects found during marking
a61af66fc99e Initial load duke parents: diff changeset	2377 {
a61af66fc99e Initial load duke parents: diff changeset	2378 TraceTime tm_r("reference processing", print_phases(), true, gclog_or_tty);
a61af66fc99e Initial load duke parents: diff changeset	2379 if (ref_processor()->processing_is_mt()) {
a61af66fc99e Initial load duke parents: diff changeset	2380 RefProcTaskExecutor task_executor;
a61af66fc99e Initial load duke parents: diff changeset	2381 ref_processor()->process_discovered_references(
453 c96030fff130 6684579: SoftReference processing can be made more efficient ysr parents: 376 diff changeset	2382 is_alive_closure(), &mark_and_push_closure, &follow_stack_closure,
c96030fff130 6684579: SoftReference processing can be made more efficient ysr parents: 376 diff changeset	2383 &task_executor);
0 a61af66fc99e Initial load duke parents: diff changeset	2384 } else {
a61af66fc99e Initial load duke parents: diff changeset	2385 ref_processor()->process_discovered_references(
453 c96030fff130 6684579: SoftReference processing can be made more efficient ysr parents: 376 diff changeset	2386 is_alive_closure(), &mark_and_push_closure, &follow_stack_closure, NULL);
0 a61af66fc99e Initial load duke parents: diff changeset	2387 }
a61af66fc99e Initial load duke parents: diff changeset	2388 }
a61af66fc99e Initial load duke parents: diff changeset	2389
a61af66fc99e Initial load duke parents: diff changeset	2390 TraceTime tm_c("class unloading", print_phases(), true, gclog_or_tty);
10188 2f50bc369470 8013160: NPG: Remove unnecessary mark stack draining after CodeCache::do_unloading stefank parents: 10186 diff changeset	2391
2f50bc369470 8013160: NPG: Remove unnecessary mark stack draining after CodeCache::do_unloading stefank parents: 10186 diff changeset	2392 // This is the point where the entire marking should have completed.
2f50bc369470 8013160: NPG: Remove unnecessary mark stack draining after CodeCache::do_unloading stefank parents: 10186 diff changeset	2393 assert(cm->marking_stacks_empty(), "Marking should have completed");
2f50bc369470 8013160: NPG: Remove unnecessary mark stack draining after CodeCache::do_unloading stefank parents: 10186 diff changeset	2394
0 a61af66fc99e Initial load duke parents: diff changeset	2395 // Follow system dictionary roots and unload classes.
a61af66fc99e Initial load duke parents: diff changeset	2396 bool purged_class = SystemDictionary::do_unloading(is_alive_closure());
a61af66fc99e Initial load duke parents: diff changeset	2397
10188 2f50bc369470 8013160: NPG: Remove unnecessary mark stack draining after CodeCache::do_unloading stefank parents: 10186 diff changeset	2398 // Unload nmethods.
6787 8966c2d65d96 7200470: KeepAliveClosure not needed in CodeCache::do_unloading brutisso parents: 6757 diff changeset	2399 CodeCache::do_unloading(is_alive_closure(), purged_class);
10188 2f50bc369470 8013160: NPG: Remove unnecessary mark stack draining after CodeCache::do_unloading stefank parents: 10186 diff changeset	2400
2f50bc369470 8013160: NPG: Remove unnecessary mark stack draining after CodeCache::do_unloading stefank parents: 10186 diff changeset	2401 // Prune dead klasses from subklass/sibling/implementor lists.
6725 da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	2402 Klass::clean_weak_klass_links(is_alive_closure());
0 a61af66fc99e Initial load duke parents: diff changeset	2403
10188 2f50bc369470 8013160: NPG: Remove unnecessary mark stack draining after CodeCache::do_unloading stefank parents: 10186 diff changeset	2404 // Delete entries for dead interned strings.
0 a61af66fc99e Initial load duke parents: diff changeset	2405 StringTable::unlink(is_alive_closure());
10188 2f50bc369470 8013160: NPG: Remove unnecessary mark stack draining after CodeCache::do_unloading stefank parents: 10186 diff changeset	2406
2177 3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 2147 diff changeset	2407 // Clean up unreferenced symbols in symbol table.
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 2147 diff changeset	2408 SymbolTable::unlink();
0 a61af66fc99e Initial load duke parents: diff changeset	2409 }
a61af66fc99e Initial load duke parents: diff changeset	2410
6725 da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	2411 void PSParallelCompact::follow_klass(ParCompactionManager* cm, Klass* klass) {
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	2412 ClassLoaderData* cld = klass->class_loader_data();
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	2413 // The actual processing of the klass is done when we
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	2414 // traverse the list of Klasses in the class loader data.
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	2415 PSParallelCompact::follow_class_loader(cm, cld);
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	2416 }
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	2417
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	2418 void PSParallelCompact::adjust_klass(ParCompactionManager* cm, Klass* klass) {
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	2419 ClassLoaderData* cld = klass->class_loader_data();
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	2420 // The actual processing of the klass is done when we
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	2421 // traverse the list of Klasses in the class loader data.
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	2422 PSParallelCompact::adjust_class_loader(cm, cld);
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	2423 }
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	2424
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	2425 void PSParallelCompact::follow_class_loader(ParCompactionManager* cm,
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	2426 ClassLoaderData* cld) {
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	2427 PSParallelCompact::MarkAndPushClosure mark_and_push_closure(cm);
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	2428 PSParallelCompact::FollowKlassClosure follow_klass_closure(&mark_and_push_closure);
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	2429
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	2430 cld->oops_do(&mark_and_push_closure, &follow_klass_closure, true);
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	2431 }
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	2432
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	2433 void PSParallelCompact::adjust_class_loader(ParCompactionManager* cm,
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	2434 ClassLoaderData* cld) {
10179 a08c80e9e1e5 8012687: Remove unused is_root checks and closures stefank parents: 9076 diff changeset	2435 cld->oops_do(PSParallelCompact::adjust_pointer_closure(),
6725 da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	2436 PSParallelCompact::adjust_klass_closure(),
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	2437 true);
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	2438 }
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	2439
0 a61af66fc99e Initial load duke parents: diff changeset	2440 // This should be moved to the shared markSweep code!
a61af66fc99e Initial load duke parents: diff changeset	2441 class PSAlwaysTrueClosure: public BoolObjectClosure {
a61af66fc99e Initial load duke parents: diff changeset	2442 public:
a61af66fc99e Initial load duke parents: diff changeset	2443 bool do_object_b(oop p) { return true; }
a61af66fc99e Initial load duke parents: diff changeset	2444 };
a61af66fc99e Initial load duke parents: diff changeset	2445 static PSAlwaysTrueClosure always_true;
a61af66fc99e Initial load duke parents: diff changeset	2446
a61af66fc99e Initial load duke parents: diff changeset	2447 void PSParallelCompact::adjust_roots() {
a61af66fc99e Initial load duke parents: diff changeset	2448 // Adjust the pointers to reflect the new locations
a61af66fc99e Initial load duke parents: diff changeset	2449 TraceTime tm("adjust roots", print_phases(), true, gclog_or_tty);
a61af66fc99e Initial load duke parents: diff changeset	2450
6725 da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	2451 // Need new claim bits when tracing through and adjusting pointers.
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	2452 ClassLoaderDataGraph::clear_claimed_marks();
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	2453
0 a61af66fc99e Initial load duke parents: diff changeset	2454 // General strong roots.
10179 a08c80e9e1e5 8012687: Remove unused is_root checks and closures stefank parents: 9076 diff changeset	2455 Universe::oops_do(adjust_pointer_closure());
a08c80e9e1e5 8012687: Remove unused is_root checks and closures stefank parents: 9076 diff changeset	2456 JNIHandles::oops_do(adjust_pointer_closure()); // Global (strong) JNI handles
a08c80e9e1e5 8012687: Remove unused is_root checks and closures stefank parents: 9076 diff changeset	2457 CLDToOopClosure adjust_from_cld(adjust_pointer_closure());
a08c80e9e1e5 8012687: Remove unused is_root checks and closures stefank parents: 9076 diff changeset	2458 Threads::oops_do(adjust_pointer_closure(), &adjust_from_cld, NULL);
a08c80e9e1e5 8012687: Remove unused is_root checks and closures stefank parents: 9076 diff changeset	2459 ObjectSynchronizer::oops_do(adjust_pointer_closure());
a08c80e9e1e5 8012687: Remove unused is_root checks and closures stefank parents: 9076 diff changeset	2460 FlatProfiler::oops_do(adjust_pointer_closure());
a08c80e9e1e5 8012687: Remove unused is_root checks and closures stefank parents: 9076 diff changeset	2461 Management::oops_do(adjust_pointer_closure());
a08c80e9e1e5 8012687: Remove unused is_root checks and closures stefank parents: 9076 diff changeset	2462 JvmtiExport::oops_do(adjust_pointer_closure());
0 a61af66fc99e Initial load duke parents: diff changeset	2463 // SO_AllClasses
10179 a08c80e9e1e5 8012687: Remove unused is_root checks and closures stefank parents: 9076 diff changeset	2464 SystemDictionary::oops_do(adjust_pointer_closure());
a08c80e9e1e5 8012687: Remove unused is_root checks and closures stefank parents: 9076 diff changeset	2465 ClassLoaderDataGraph::oops_do(adjust_pointer_closure(), adjust_klass_closure(), true);
0 a61af66fc99e Initial load duke parents: diff changeset	2466
a61af66fc99e Initial load duke parents: diff changeset	2467 // Now adjust pointers in remaining weak roots. (All of which should
a61af66fc99e Initial load duke parents: diff changeset	2468 // have been cleared if they pointed to non-surviving objects.)
a61af66fc99e Initial load duke parents: diff changeset	2469 // Global (weak) JNI handles
10179 a08c80e9e1e5 8012687: Remove unused is_root checks and closures stefank parents: 9076 diff changeset	2470 JNIHandles::weak_oops_do(&always_true, adjust_pointer_closure());
0 a61af66fc99e Initial load duke parents: diff changeset	2471
a61af66fc99e Initial load duke parents: diff changeset	2472 CodeCache::oops_do(adjust_pointer_closure());
10179 a08c80e9e1e5 8012687: Remove unused is_root checks and closures stefank parents: 9076 diff changeset	2473 StringTable::oops_do(adjust_pointer_closure());
a08c80e9e1e5 8012687: Remove unused is_root checks and closures stefank parents: 9076 diff changeset	2474 ref_processor()->weak_oops_do(adjust_pointer_closure());
0 a61af66fc99e Initial load duke parents: diff changeset	2475 // Roots were visited so references into the young gen in roots
a61af66fc99e Initial load duke parents: diff changeset	2476 // may have been scanned. Process them also.
a61af66fc99e Initial load duke parents: diff changeset	2477 // Should the reference processor have a span that excludes
a61af66fc99e Initial load duke parents: diff changeset	2478 // young gen objects?
10179 a08c80e9e1e5 8012687: Remove unused is_root checks and closures stefank parents: 9076 diff changeset	2479 PSScavenge::reference_processor()->weak_oops_do(adjust_pointer_closure());
0 a61af66fc99e Initial load duke parents: diff changeset	2480 }
a61af66fc99e Initial load duke parents: diff changeset	2481
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2482 void PSParallelCompact::enqueue_region_draining_tasks(GCTaskQueue* q,
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2483 uint parallel_gc_threads)
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2484 {
0 a61af66fc99e Initial load duke parents: diff changeset	2485 TraceTime tm("drain task setup", print_phases(), true, gclog_or_tty);
a61af66fc99e Initial load duke parents: diff changeset	2486
4095 bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 3979 diff changeset	2487 // Find the threads that are active
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 3979 diff changeset	2488 unsigned int which = 0;
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 3979 diff changeset	2489
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 3979 diff changeset	2490 const uint task_count = MAX2(parallel_gc_threads, 1U);
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 3979 diff changeset	2491 for (uint j = 0; j < task_count; j++) {
1833 8b10f48633dc 6984287: Regularize how GC parallel workers are specified. jmasa parents: 1638 diff changeset	2492 q->enqueue(new DrainStacksCompactionTask(j));
4095 bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 3979 diff changeset	2493 ParCompactionManager::verify_region_list_empty(j);
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 3979 diff changeset	2494 // Set the region stacks variables to "no" region stack values
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 3979 diff changeset	2495 // so that they will be recognized and needing a region stack
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 3979 diff changeset	2496 // in the stealing tasks if they do not get one by executing
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 3979 diff changeset	2497 // a draining stack.
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 3979 diff changeset	2498 ParCompactionManager* cm = ParCompactionManager::manager_array(j);
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 3979 diff changeset	2499 cm->set_region_stack(NULL);
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 3979 diff changeset	2500 cm->set_region_stack_index((uint)max_uintx);
0 a61af66fc99e Initial load duke parents: diff changeset	2501 }
4095 bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 3979 diff changeset	2502 ParCompactionManager::reset_recycled_stack_index();
0 a61af66fc99e Initial load duke parents: diff changeset	2503
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2504 // Find all regions that are available (can be filled immediately) and
0 a61af66fc99e Initial load duke parents: diff changeset	2505 // distribute them to the thread stacks. The iteration is done in reverse
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2506 // order (high to low) so the regions will be removed in ascending order.
0 a61af66fc99e Initial load duke parents: diff changeset	2507
a61af66fc99e Initial load duke parents: diff changeset	2508 const ParallelCompactData& sd = PSParallelCompact::summary_data();
a61af66fc99e Initial load duke parents: diff changeset	2509
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2510 size_t fillable_regions = 0; // A count for diagnostic purposes.
4095 bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 3979 diff changeset	2511 // A region index which corresponds to the tasks created above.
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 3979 diff changeset	2512 // "which" must be 0 <= which < task_count
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 3979 diff changeset	2513
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 3979 diff changeset	2514 which = 0;
6725 da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	2515 // id + 1 is used to test termination so unsigned can
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	2516 // be used with an old_space_id == 0.
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	2517 for (unsigned int id = to_space_id; id + 1 > old_space_id; --id) {
0 a61af66fc99e Initial load duke parents: diff changeset	2518 SpaceInfo* const space_info = _space_info + id;
a61af66fc99e Initial load duke parents: diff changeset	2519 MutableSpace* const space = space_info->space();
a61af66fc99e Initial load duke parents: diff changeset	2520 HeapWord* const new_top = space_info->new_top();
a61af66fc99e Initial load duke parents: diff changeset	2521
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2522 const size_t beg_region = sd.addr_to_region_idx(space_info->dense_prefix());
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2523 const size_t end_region =
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2524 sd.addr_to_region_idx(sd.region_align_up(new_top));
6725 da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	2525
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	2526 for (size_t cur = end_region - 1; cur + 1 > beg_region; --cur) {
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2527 if (sd.region(cur)->claim_unsafe()) {
4095 bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 3979 diff changeset	2528 ParCompactionManager::region_list_push(which, cur);
0 a61af66fc99e Initial load duke parents: diff changeset	2529
a61af66fc99e Initial load duke parents: diff changeset	2530 if (TraceParallelOldGCCompactionPhase && Verbose) {
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2531 const size_t count_mod_8 = fillable_regions & 7;
0 a61af66fc99e Initial load duke parents: diff changeset	2532 if (count_mod_8 == 0) gclog_or_tty->print("fillable: ");
264 15dd2594d08e 6718283: existing uses of _FORMAT_W() were broken by 6521491 jcoomes* parents: 263 diff changeset	2533 gclog_or_tty->print(" " SIZE_FORMAT_W(7), cur);
0 a61af66fc99e Initial load duke parents: diff changeset	2534 if (count_mod_8 == 7) gclog_or_tty->cr();
a61af66fc99e Initial load duke parents: diff changeset	2535 }
a61af66fc99e Initial load duke parents: diff changeset	2536
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2537 NOT_PRODUCT(++fillable_regions;)
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2538
4095 bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 3979 diff changeset	2539 // Assign regions to tasks in round-robin fashion.
0 a61af66fc99e Initial load duke parents: diff changeset	2540 if (++which == task_count) {
4095 bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 3979 diff changeset	2541 assert(which <= parallel_gc_threads,
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 3979 diff changeset	2542 "Inconsistent number of workers");
0 a61af66fc99e Initial load duke parents: diff changeset	2543 which = 0;
a61af66fc99e Initial load duke parents: diff changeset	2544 }
a61af66fc99e Initial load duke parents: diff changeset	2545 }
a61af66fc99e Initial load duke parents: diff changeset	2546 }
a61af66fc99e Initial load duke parents: diff changeset	2547 }
a61af66fc99e Initial load duke parents: diff changeset	2548
a61af66fc99e Initial load duke parents: diff changeset	2549 if (TraceParallelOldGCCompactionPhase) {
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2550 if (Verbose && (fillable_regions & 7) != 0) gclog_or_tty->cr();
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2551 gclog_or_tty->print_cr("%u initially fillable regions", fillable_regions);
0 a61af66fc99e Initial load duke parents: diff changeset	2552 }
a61af66fc99e Initial load duke parents: diff changeset	2553 }
a61af66fc99e Initial load duke parents: diff changeset	2554
a61af66fc99e Initial load duke parents: diff changeset	2555 #define PAR_OLD_DENSE_PREFIX_OVER_PARTITIONING 4
a61af66fc99e Initial load duke parents: diff changeset	2556
a61af66fc99e Initial load duke parents: diff changeset	2557 void PSParallelCompact::enqueue_dense_prefix_tasks(GCTaskQueue* q,
a61af66fc99e Initial load duke parents: diff changeset	2558 uint parallel_gc_threads) {
a61af66fc99e Initial load duke parents: diff changeset	2559 TraceTime tm("dense prefix task setup", print_phases(), true, gclog_or_tty);
a61af66fc99e Initial load duke parents: diff changeset	2560
a61af66fc99e Initial load duke parents: diff changeset	2561 ParallelCompactData& sd = PSParallelCompact::summary_data();
a61af66fc99e Initial load duke parents: diff changeset	2562
a61af66fc99e Initial load duke parents: diff changeset	2563 // Iterate over all the spaces adding tasks for updating
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2564 // regions in the dense prefix. Assume that 1 gc thread
0 a61af66fc99e Initial load duke parents: diff changeset	2565 // will work on opening the gaps and the remaining gc threads
a61af66fc99e Initial load duke parents: diff changeset	2566 // will work on the dense prefix.
482 7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	2567 unsigned int space_id;
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	2568 for (space_id = old_space_id; space_id < last_space_id; ++ space_id) {
0 a61af66fc99e Initial load duke parents: diff changeset	2569 HeapWord* const dense_prefix_end = _space_info[space_id].dense_prefix();
a61af66fc99e Initial load duke parents: diff changeset	2570 const MutableSpace* const space = _space_info[space_id].space();
a61af66fc99e Initial load duke parents: diff changeset	2571
a61af66fc99e Initial load duke parents: diff changeset	2572 if (dense_prefix_end == space->bottom()) {
a61af66fc99e Initial load duke parents: diff changeset	2573 // There is no dense prefix for this space.
a61af66fc99e Initial load duke parents: diff changeset	2574 continue;
a61af66fc99e Initial load duke parents: diff changeset	2575 }
a61af66fc99e Initial load duke parents: diff changeset	2576
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2577 // The dense prefix is before this region.
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2578 size_t region_index_end_dense_prefix =
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2579 sd.addr_to_region_idx(dense_prefix_end);
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2580 RegionData* const dense_prefix_cp =
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2581 sd.region(region_index_end_dense_prefix);
0 a61af66fc99e Initial load duke parents: diff changeset	2582 assert(dense_prefix_end == space->end() \|\|
a61af66fc99e Initial load duke parents: diff changeset	2583 dense_prefix_cp->available() \|\|
a61af66fc99e Initial load duke parents: diff changeset	2584 dense_prefix_cp->claimed(),
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2585 "The region after the dense prefix should always be ready to fill");
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2586
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2587 size_t region_index_start = sd.addr_to_region_idx(space->bottom());
0 a61af66fc99e Initial load duke parents: diff changeset	2588
a61af66fc99e Initial load duke parents: diff changeset	2589 // Is there dense prefix work?
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2590 size_t total_dense_prefix_regions =
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2591 region_index_end_dense_prefix - region_index_start;
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2592 // How many regions of the dense prefix should be given to
0 a61af66fc99e Initial load duke parents: diff changeset	2593 // each thread?
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2594 if (total_dense_prefix_regions > 0) {
0 a61af66fc99e Initial load duke parents: diff changeset	2595 uint tasks_for_dense_prefix = 1;
3251 eda9eb483d29 6841742: par compact - remove unused/unsupported options jcoomes parents: 2369 diff changeset	2596 if (total_dense_prefix_regions <=
eda9eb483d29 6841742: par compact - remove unused/unsupported options jcoomes parents: 2369 diff changeset	2597 (parallel_gc_threads * PAR_OLD_DENSE_PREFIX_OVER_PARTITIONING)) {
eda9eb483d29 6841742: par compact - remove unused/unsupported options jcoomes parents: 2369 diff changeset	2598 // Don't over partition. This assumes that
eda9eb483d29 6841742: par compact - remove unused/unsupported options jcoomes parents: 2369 diff changeset	2599 // PAR_OLD_DENSE_PREFIX_OVER_PARTITIONING is a small integer value
eda9eb483d29 6841742: par compact - remove unused/unsupported options jcoomes parents: 2369 diff changeset	2600 // so there are not many regions to process.
eda9eb483d29 6841742: par compact - remove unused/unsupported options jcoomes parents: 2369 diff changeset	2601 tasks_for_dense_prefix = parallel_gc_threads;
eda9eb483d29 6841742: par compact - remove unused/unsupported options jcoomes parents: 2369 diff changeset	2602 } else {
eda9eb483d29 6841742: par compact - remove unused/unsupported options jcoomes parents: 2369 diff changeset	2603 // Over partition
eda9eb483d29 6841742: par compact - remove unused/unsupported options jcoomes parents: 2369 diff changeset	2604 tasks_for_dense_prefix = parallel_gc_threads *
eda9eb483d29 6841742: par compact - remove unused/unsupported options jcoomes parents: 2369 diff changeset	2605 PAR_OLD_DENSE_PREFIX_OVER_PARTITIONING;
0 a61af66fc99e Initial load duke parents: diff changeset	2606 }
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2607 size_t regions_per_thread = total_dense_prefix_regions /
0 a61af66fc99e Initial load duke parents: diff changeset	2608 tasks_for_dense_prefix;
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2609 // Give each thread at least 1 region.
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2610 if (regions_per_thread == 0) {
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2611 regions_per_thread = 1;
0 a61af66fc99e Initial load duke parents: diff changeset	2612 }
a61af66fc99e Initial load duke parents: diff changeset	2613
a61af66fc99e Initial load duke parents: diff changeset	2614 for (uint k = 0; k < tasks_for_dense_prefix; k++) {
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2615 if (region_index_start >= region_index_end_dense_prefix) {
0 a61af66fc99e Initial load duke parents: diff changeset	2616 break;
a61af66fc99e Initial load duke parents: diff changeset	2617 }
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2618 // region_index_end is not processed
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2619 size_t region_index_end = MIN2(region_index_start + regions_per_thread,
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2620 region_index_end_dense_prefix);
482 7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	2621 q->enqueue(new UpdateDensePrefixTask(SpaceId(space_id),
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	2622 region_index_start,
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	2623 region_index_end));
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2624 region_index_start = region_index_end;
0 a61af66fc99e Initial load duke parents: diff changeset	2625 }
a61af66fc99e Initial load duke parents: diff changeset	2626 }
a61af66fc99e Initial load duke parents: diff changeset	2627 // This gets any part of the dense prefix that did not
a61af66fc99e Initial load duke parents: diff changeset	2628 // fit evenly.
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2629 if (region_index_start < region_index_end_dense_prefix) {
482 7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	2630 q->enqueue(new UpdateDensePrefixTask(SpaceId(space_id),
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	2631 region_index_start,
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	2632 region_index_end_dense_prefix));
0 a61af66fc99e Initial load duke parents: diff changeset	2633 }
482 7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	2634 }
0 a61af66fc99e Initial load duke parents: diff changeset	2635 }
a61af66fc99e Initial load duke parents: diff changeset	2636
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2637 void PSParallelCompact::enqueue_region_stealing_tasks(
0 a61af66fc99e Initial load duke parents: diff changeset	2638 GCTaskQueue* q,
a61af66fc99e Initial load duke parents: diff changeset	2639 ParallelTaskTerminator* terminator_ptr,
a61af66fc99e Initial load duke parents: diff changeset	2640 uint parallel_gc_threads) {
a61af66fc99e Initial load duke parents: diff changeset	2641 TraceTime tm("steal task setup", print_phases(), true, gclog_or_tty);
a61af66fc99e Initial load duke parents: diff changeset	2642
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2643 // Once a thread has drained it's stack, it should try to steal regions from
0 a61af66fc99e Initial load duke parents: diff changeset	2644 // other threads.
a61af66fc99e Initial load duke parents: diff changeset	2645 if (parallel_gc_threads > 1) {
a61af66fc99e Initial load duke parents: diff changeset	2646 for (uint j = 0; j < parallel_gc_threads; j++) {
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2647 q->enqueue(new StealRegionCompactionTask(terminator_ptr));
0 a61af66fc99e Initial load duke parents: diff changeset	2648 }
a61af66fc99e Initial load duke parents: diff changeset	2649 }
a61af66fc99e Initial load duke parents: diff changeset	2650 }
a61af66fc99e Initial load duke parents: diff changeset	2651
10369 5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	2652 #ifdef ASSERT
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	2653 // Write a histogram of the number of times the block table was filled for a
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	2654 // region.
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	2655 void PSParallelCompact::write_block_fill_histogram(outputStream* const out)
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	2656 {
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	2657 if (!TraceParallelOldGCCompactionPhase) return;
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	2658
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	2659 typedef ParallelCompactData::RegionData rd_t;
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	2660 ParallelCompactData& sd = summary_data();
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	2661
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	2662 for (unsigned int id = old_space_id; id < last_space_id; ++id) {
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	2663 MutableSpace* const spc = _space_info[id].space();
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	2664 if (spc->bottom() != spc->top()) {
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	2665 const rd_t* const beg = sd.addr_to_region_ptr(spc->bottom());
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	2666 HeapWord* const top_aligned_up = sd.region_align_up(spc->top());
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	2667 const rd_t* const end = sd.addr_to_region_ptr(top_aligned_up);
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	2668
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	2669 size_t histo[5] = { 0, 0, 0, 0, 0 };
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	2670 const size_t histo_len = sizeof(histo) / sizeof(size_t);
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	2671 const size_t region_cnt = pointer_delta(end, beg, sizeof(rd_t));
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	2672
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	2673 for (const rd_t* cur = beg; cur < end; ++cur) {
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	2674 ++histo[MIN2(cur->blocks_filled_count(), histo_len - 1)];
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	2675 }
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	2676 out->print("%u %-4s" SIZE_FORMAT_W(5), id, space_names[id], region_cnt);
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	2677 for (size_t i = 0; i < histo_len; ++i) {
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	2678 out->print(" " SIZE_FORMAT_W(5) " %5.1f%%",
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	2679 histo[i], 100.0 * histo[i] / region_cnt);
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	2680 }
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	2681 out->cr();
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	2682 }
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	2683 }
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	2684 }
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	2685 #endif // #ifdef ASSERT
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	2686
0 a61af66fc99e Initial load duke parents: diff changeset	2687 void PSParallelCompact::compact() {
a61af66fc99e Initial load duke parents: diff changeset	2688 // trace("5");
a61af66fc99e Initial load duke parents: diff changeset	2689 TraceTime tm("compaction phase", print_phases(), true, gclog_or_tty);
a61af66fc99e Initial load duke parents: diff changeset	2690
a61af66fc99e Initial load duke parents: diff changeset	2691 ParallelScavengeHeap* heap = (ParallelScavengeHeap*)Universe::heap();
a61af66fc99e Initial load duke parents: diff changeset	2692 assert(heap->kind() == CollectedHeap::ParallelScavengeHeap, "Sanity");
a61af66fc99e Initial load duke parents: diff changeset	2693 PSOldGen* old_gen = heap->old_gen();
a61af66fc99e Initial load duke parents: diff changeset	2694 old_gen->start_array()->reset();
a61af66fc99e Initial load duke parents: diff changeset	2695 uint parallel_gc_threads = heap->gc_task_manager()->workers();
4095 bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 3979 diff changeset	2696 uint active_gc_threads = heap->gc_task_manager()->active_workers();
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2697 TaskQueueSetSuper* qset = ParCompactionManager::region_array();
4095 bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 3979 diff changeset	2698 ParallelTaskTerminator terminator(active_gc_threads, qset);
0 a61af66fc99e Initial load duke parents: diff changeset	2699
a61af66fc99e Initial load duke parents: diff changeset	2700 GCTaskQueue* q = GCTaskQueue::create();
4095 bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 3979 diff changeset	2701 enqueue_region_draining_tasks(q, active_gc_threads);
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 3979 diff changeset	2702 enqueue_dense_prefix_tasks(q, active_gc_threads);
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 3979 diff changeset	2703 enqueue_region_stealing_tasks(q, &terminator, active_gc_threads);
0 a61af66fc99e Initial load duke parents: diff changeset	2704
a61af66fc99e Initial load duke parents: diff changeset	2705 {
a61af66fc99e Initial load duke parents: diff changeset	2706 TraceTime tm_pc("par compact", print_phases(), true, gclog_or_tty);
a61af66fc99e Initial load duke parents: diff changeset	2707
4095 bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 3979 diff changeset	2708 gc_task_manager()->execute_and_wait(q);
0 a61af66fc99e Initial load duke parents: diff changeset	2709
a61af66fc99e Initial load duke parents: diff changeset	2710 #ifdef ASSERT
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2711 // Verify that all regions have been processed before the deferred updates.
0 a61af66fc99e Initial load duke parents: diff changeset	2712 for (unsigned int id = old_space_id; id < last_space_id; ++id) {
a61af66fc99e Initial load duke parents: diff changeset	2713 verify_complete(SpaceId(id));
a61af66fc99e Initial load duke parents: diff changeset	2714 }
a61af66fc99e Initial load duke parents: diff changeset	2715 #endif
a61af66fc99e Initial load duke parents: diff changeset	2716 }
a61af66fc99e Initial load duke parents: diff changeset	2717
a61af66fc99e Initial load duke parents: diff changeset	2718 {
a61af66fc99e Initial load duke parents: diff changeset	2719 // Update the deferred objects, if any. Any compaction manager can be used.
a61af66fc99e Initial load duke parents: diff changeset	2720 TraceTime tm_du("deferred updates", print_phases(), true, gclog_or_tty);
a61af66fc99e Initial load duke parents: diff changeset	2721 ParCompactionManager* cm = ParCompactionManager::manager_array(0);
a61af66fc99e Initial load duke parents: diff changeset	2722 for (unsigned int id = old_space_id; id < last_space_id; ++id) {
a61af66fc99e Initial load duke parents: diff changeset	2723 update_deferred_objects(cm, SpaceId(id));
a61af66fc99e Initial load duke parents: diff changeset	2724 }
a61af66fc99e Initial load duke parents: diff changeset	2725 }
10369 5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	2726
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	2727 DEBUG_ONLY(write_block_fill_histogram(gclog_or_tty));
0 a61af66fc99e Initial load duke parents: diff changeset	2728 }
a61af66fc99e Initial load duke parents: diff changeset	2729
a61af66fc99e Initial load duke parents: diff changeset	2730 #ifdef ASSERT
a61af66fc99e Initial load duke parents: diff changeset	2731 void PSParallelCompact::verify_complete(SpaceId space_id) {
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2732 // All Regions between space bottom() to new_top() should be marked as filled
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2733 // and all Regions between new_top() and top() should be available (i.e.,
0 a61af66fc99e Initial load duke parents: diff changeset	2734 // should have been emptied).
a61af66fc99e Initial load duke parents: diff changeset	2735 ParallelCompactData& sd = summary_data();
a61af66fc99e Initial load duke parents: diff changeset	2736 SpaceInfo si = _space_info[space_id];
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2737 HeapWord* new_top_addr = sd.region_align_up(si.new_top());
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2738 HeapWord* old_top_addr = sd.region_align_up(si.space()->top());
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2739 const size_t beg_region = sd.addr_to_region_idx(si.space()->bottom());
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2740 const size_t new_top_region = sd.addr_to_region_idx(new_top_addr);
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2741 const size_t old_top_region = sd.addr_to_region_idx(old_top_addr);
0 a61af66fc99e Initial load duke parents: diff changeset	2742
a61af66fc99e Initial load duke parents: diff changeset	2743 bool issued_a_warning = false;
a61af66fc99e Initial load duke parents: diff changeset	2744
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2745 size_t cur_region;
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2746 for (cur_region = beg_region; cur_region < new_top_region; ++cur_region) {
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2747 const RegionData* const c = sd.region(cur_region);
0 a61af66fc99e Initial load duke parents: diff changeset	2748 if (!c->completed()) {
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2749 warning("region " SIZE_FORMAT " not filled: "
0 a61af66fc99e Initial load duke parents: diff changeset	2750 "destination_count=" SIZE_FORMAT,
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2751 cur_region, c->destination_count());
0 a61af66fc99e Initial load duke parents: diff changeset	2752 issued_a_warning = true;
a61af66fc99e Initial load duke parents: diff changeset	2753 }
a61af66fc99e Initial load duke parents: diff changeset	2754 }
a61af66fc99e Initial load duke parents: diff changeset	2755
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2756 for (cur_region = new_top_region; cur_region < old_top_region; ++cur_region) {
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2757 const RegionData* const c = sd.region(cur_region);
0 a61af66fc99e Initial load duke parents: diff changeset	2758 if (!c->available()) {
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2759 warning("region " SIZE_FORMAT " not empty: "
0 a61af66fc99e Initial load duke parents: diff changeset	2760 "destination_count=" SIZE_FORMAT,
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2761 cur_region, c->destination_count());
0 a61af66fc99e Initial load duke parents: diff changeset	2762 issued_a_warning = true;
a61af66fc99e Initial load duke parents: diff changeset	2763 }
a61af66fc99e Initial load duke parents: diff changeset	2764 }
a61af66fc99e Initial load duke parents: diff changeset	2765
a61af66fc99e Initial load duke parents: diff changeset	2766 if (issued_a_warning) {
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2767 print_region_ranges();
0 a61af66fc99e Initial load duke parents: diff changeset	2768 }
a61af66fc99e Initial load duke parents: diff changeset	2769 }
a61af66fc99e Initial load duke parents: diff changeset	2770 #endif // #ifdef ASSERT
a61af66fc99e Initial load duke parents: diff changeset	2771
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2772 // Update interior oops in the ranges of regions [beg_region, end_region).
0 a61af66fc99e Initial load duke parents: diff changeset	2773 void
a61af66fc99e Initial load duke parents: diff changeset	2774 PSParallelCompact::update_and_deadwood_in_dense_prefix(ParCompactionManager* cm,
a61af66fc99e Initial load duke parents: diff changeset	2775 SpaceId space_id,
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2776 size_t beg_region,
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2777 size_t end_region) {
0 a61af66fc99e Initial load duke parents: diff changeset	2778 ParallelCompactData& sd = summary_data();
a61af66fc99e Initial load duke parents: diff changeset	2779 ParMarkBitMap* const mbm = mark_bitmap();
a61af66fc99e Initial load duke parents: diff changeset	2780
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2781 HeapWord* beg_addr = sd.region_to_addr(beg_region);
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2782 HeapWord* const end_addr = sd.region_to_addr(end_region);
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2783 assert(beg_region <= end_region, "bad region range");
0 a61af66fc99e Initial load duke parents: diff changeset	2784 assert(end_addr <= dense_prefix(space_id), "not in the dense prefix");
a61af66fc99e Initial load duke parents: diff changeset	2785
a61af66fc99e Initial load duke parents: diff changeset	2786 #ifdef ASSERT
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2787 // Claim the regions to avoid triggering an assert when they are marked as
0 a61af66fc99e Initial load duke parents: diff changeset	2788 // filled.
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2789 for (size_t claim_region = beg_region; claim_region < end_region; ++claim_region) {
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2790 assert(sd.region(claim_region)->claim_unsafe(), "claim() failed");
0 a61af66fc99e Initial load duke parents: diff changeset	2791 }
a61af66fc99e Initial load duke parents: diff changeset	2792 #endif // #ifdef ASSERT
a61af66fc99e Initial load duke parents: diff changeset	2793
a61af66fc99e Initial load duke parents: diff changeset	2794 if (beg_addr != space(space_id)->bottom()) {
a61af66fc99e Initial load duke parents: diff changeset	2795 // Find the first live object or block of dead space that starts in this
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2796 // range of regions. If a partial object crosses onto the region, skip it;
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2797 // it will be marked for 'deferred update' when the object head is
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2798 // processed. If dead space crosses onto the region, it is also skipped; it
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2799 // will be filled when the prior region is processed. If neither of those
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2800 // apply, the first word in the region is the start of a live object or dead
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2801 // space.
0 a61af66fc99e Initial load duke parents: diff changeset	2802 assert(beg_addr > space(space_id)->bottom(), "sanity");
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2803 const RegionData* const cp = sd.region(beg_region);
0 a61af66fc99e Initial load duke parents: diff changeset	2804 if (cp->partial_obj_size() != 0) {
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2805 beg_addr = sd.partial_obj_end(beg_region);
0 a61af66fc99e Initial load duke parents: diff changeset	2806 } else if (dead_space_crosses_boundary(cp, mbm->addr_to_bit(beg_addr))) {
a61af66fc99e Initial load duke parents: diff changeset	2807 beg_addr = mbm->find_obj_beg(beg_addr, end_addr);
a61af66fc99e Initial load duke parents: diff changeset	2808 }
a61af66fc99e Initial load duke parents: diff changeset	2809 }
a61af66fc99e Initial load duke parents: diff changeset	2810
a61af66fc99e Initial load duke parents: diff changeset	2811 if (beg_addr < end_addr) {
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2812 // A live object or block of dead space starts in this range of Regions.
0 a61af66fc99e Initial load duke parents: diff changeset	2813 HeapWord* const dense_prefix_end = dense_prefix(space_id);
a61af66fc99e Initial load duke parents: diff changeset	2814
a61af66fc99e Initial load duke parents: diff changeset	2815 // Create closures and iterate.
a61af66fc99e Initial load duke parents: diff changeset	2816 UpdateOnlyClosure update_closure(mbm, cm, space_id);
a61af66fc99e Initial load duke parents: diff changeset	2817 FillClosure fill_closure(cm, space_id);
a61af66fc99e Initial load duke parents: diff changeset	2818 ParMarkBitMap::IterationStatus status;
a61af66fc99e Initial load duke parents: diff changeset	2819 status = mbm->iterate(&update_closure, &fill_closure, beg_addr, end_addr,
a61af66fc99e Initial load duke parents: diff changeset	2820 dense_prefix_end);
a61af66fc99e Initial load duke parents: diff changeset	2821 if (status == ParMarkBitMap::incomplete) {
a61af66fc99e Initial load duke parents: diff changeset	2822 update_closure.do_addr(update_closure.source());
a61af66fc99e Initial load duke parents: diff changeset	2823 }
a61af66fc99e Initial load duke parents: diff changeset	2824 }
a61af66fc99e Initial load duke parents: diff changeset	2825
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2826 // Mark the regions as filled.
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2827 RegionData* const beg_cp = sd.region(beg_region);
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2828 RegionData* const end_cp = sd.region(end_region);
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2829 for (RegionData* cp = beg_cp; cp < end_cp; ++cp) {
0 a61af66fc99e Initial load duke parents: diff changeset	2830 cp->set_completed();
a61af66fc99e Initial load duke parents: diff changeset	2831 }
a61af66fc99e Initial load duke parents: diff changeset	2832 }
a61af66fc99e Initial load duke parents: diff changeset	2833
a61af66fc99e Initial load duke parents: diff changeset	2834 // Return the SpaceId for the space containing addr. If addr is not in the
a61af66fc99e Initial load duke parents: diff changeset	2835 // heap, last_space_id is returned. In debug mode it expects the address to be
a61af66fc99e Initial load duke parents: diff changeset	2836 // in the heap and asserts such.
a61af66fc99e Initial load duke parents: diff changeset	2837 PSParallelCompact::SpaceId PSParallelCompact::space_id(HeapWord* addr) {
a61af66fc99e Initial load duke parents: diff changeset	2838 assert(Universe::heap()->is_in_reserved(addr), "addr not in the heap");
a61af66fc99e Initial load duke parents: diff changeset	2839
6725 da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	2840 for (unsigned int id = old_space_id; id < last_space_id; ++id) {
0 a61af66fc99e Initial load duke parents: diff changeset	2841 if (_space_info[id].space()->contains(addr)) {
a61af66fc99e Initial load duke parents: diff changeset	2842 return SpaceId(id);
a61af66fc99e Initial load duke parents: diff changeset	2843 }
a61af66fc99e Initial load duke parents: diff changeset	2844 }
a61af66fc99e Initial load duke parents: diff changeset	2845
a61af66fc99e Initial load duke parents: diff changeset	2846 assert(false, "no space contains the addr");
a61af66fc99e Initial load duke parents: diff changeset	2847 return last_space_id;
a61af66fc99e Initial load duke parents: diff changeset	2848 }
a61af66fc99e Initial load duke parents: diff changeset	2849
a61af66fc99e Initial load duke parents: diff changeset	2850 void PSParallelCompact::update_deferred_objects(ParCompactionManager* cm,
a61af66fc99e Initial load duke parents: diff changeset	2851 SpaceId id) {
a61af66fc99e Initial load duke parents: diff changeset	2852 assert(id < last_space_id, "bad space id");
a61af66fc99e Initial load duke parents: diff changeset	2853
a61af66fc99e Initial load duke parents: diff changeset	2854 ParallelCompactData& sd = summary_data();
a61af66fc99e Initial load duke parents: diff changeset	2855 const SpaceInfo* const space_info = _space_info + id;
a61af66fc99e Initial load duke parents: diff changeset	2856 ObjectStartArray* const start_array = space_info->start_array();
a61af66fc99e Initial load duke parents: diff changeset	2857
a61af66fc99e Initial load duke parents: diff changeset	2858 const MutableSpace* const space = space_info->space();
a61af66fc99e Initial load duke parents: diff changeset	2859 assert(space_info->dense_prefix() >= space->bottom(), "dense_prefix not set");
a61af66fc99e Initial load duke parents: diff changeset	2860 HeapWord* const beg_addr = space_info->dense_prefix();
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2861 HeapWord* const end_addr = sd.region_align_up(space_info->new_top());
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2862
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2863 const RegionData* const beg_region = sd.addr_to_region_ptr(beg_addr);
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2864 const RegionData* const end_region = sd.addr_to_region_ptr(end_addr);
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2865 const RegionData* cur_region;
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2866 for (cur_region = beg_region; cur_region < end_region; ++cur_region) {
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2867 HeapWord* const addr = cur_region->deferred_obj_addr();
0 a61af66fc99e Initial load duke parents: diff changeset	2868 if (addr != NULL) {
a61af66fc99e Initial load duke parents: diff changeset	2869 if (start_array != NULL) {
a61af66fc99e Initial load duke parents: diff changeset	2870 start_array->allocate_block(addr);
a61af66fc99e Initial load duke parents: diff changeset	2871 }
a61af66fc99e Initial load duke parents: diff changeset	2872 oop(addr)->update_contents(cm);
a61af66fc99e Initial load duke parents: diff changeset	2873 assert(oop(addr)->is_oop_or_null(), "should be an oop now");
a61af66fc99e Initial load duke parents: diff changeset	2874 }
a61af66fc99e Initial load duke parents: diff changeset	2875 }
a61af66fc99e Initial load duke parents: diff changeset	2876 }
a61af66fc99e Initial load duke parents: diff changeset	2877
a61af66fc99e Initial load duke parents: diff changeset	2878 // Skip over count live words starting from beg, and return the address of the
a61af66fc99e Initial load duke parents: diff changeset	2879 // next live word. Unless marked, the word corresponding to beg is assumed to
a61af66fc99e Initial load duke parents: diff changeset	2880 // be dead. Callers must either ensure beg does not correspond to the middle of
a61af66fc99e Initial load duke parents: diff changeset	2881 // an object, or account for those live words in some other way. Callers must
a61af66fc99e Initial load duke parents: diff changeset	2882 // also ensure that there are enough live words in the range [beg, end) to skip.
a61af66fc99e Initial load duke parents: diff changeset	2883 HeapWord*
a61af66fc99e Initial load duke parents: diff changeset	2884 PSParallelCompact::skip_live_words(HeapWord* beg, HeapWord* end, size_t count)
a61af66fc99e Initial load duke parents: diff changeset	2885 {
a61af66fc99e Initial load duke parents: diff changeset	2886 assert(count > 0, "sanity");
a61af66fc99e Initial load duke parents: diff changeset	2887
a61af66fc99e Initial load duke parents: diff changeset	2888 ParMarkBitMap* m = mark_bitmap();
a61af66fc99e Initial load duke parents: diff changeset	2889 idx_t bits_to_skip = m->words_to_bits(count);
a61af66fc99e Initial load duke parents: diff changeset	2890 idx_t cur_beg = m->addr_to_bit(beg);
a61af66fc99e Initial load duke parents: diff changeset	2891 const idx_t search_end = BitMap::word_align_up(m->addr_to_bit(end));
a61af66fc99e Initial load duke parents: diff changeset	2892
a61af66fc99e Initial load duke parents: diff changeset	2893 do {
a61af66fc99e Initial load duke parents: diff changeset	2894 cur_beg = m->find_obj_beg(cur_beg, search_end);
a61af66fc99e Initial load duke parents: diff changeset	2895 idx_t cur_end = m->find_obj_end(cur_beg, search_end);
a61af66fc99e Initial load duke parents: diff changeset	2896 const size_t obj_bits = cur_end - cur_beg + 1;
a61af66fc99e Initial load duke parents: diff changeset	2897 if (obj_bits > bits_to_skip) {
a61af66fc99e Initial load duke parents: diff changeset	2898 return m->bit_to_addr(cur_beg + bits_to_skip);
a61af66fc99e Initial load duke parents: diff changeset	2899 }
a61af66fc99e Initial load duke parents: diff changeset	2900 bits_to_skip -= obj_bits;
a61af66fc99e Initial load duke parents: diff changeset	2901 cur_beg = cur_end + 1;
a61af66fc99e Initial load duke parents: diff changeset	2902 } while (bits_to_skip > 0);
a61af66fc99e Initial load duke parents: diff changeset	2903
a61af66fc99e Initial load duke parents: diff changeset	2904 // Skipping the desired number of words landed just past the end of an object.
a61af66fc99e Initial load duke parents: diff changeset	2905 // Find the start of the next object.
a61af66fc99e Initial load duke parents: diff changeset	2906 cur_beg = m->find_obj_beg(cur_beg, search_end);
a61af66fc99e Initial load duke parents: diff changeset	2907 assert(cur_beg < m->addr_to_bit(end), "not enough live words to skip");
a61af66fc99e Initial load duke parents: diff changeset	2908 return m->bit_to_addr(cur_beg);
a61af66fc99e Initial load duke parents: diff changeset	2909 }
a61af66fc99e Initial load duke parents: diff changeset	2910
482 7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	2911 HeapWord* PSParallelCompact::first_src_addr(HeapWord* const dest_addr,
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	2912 SpaceId src_space_id,
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	2913 size_t src_region_idx)
0 a61af66fc99e Initial load duke parents: diff changeset	2914 {
482 7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	2915 assert(summary_data().is_region_aligned(dest_addr), "not aligned");
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	2916
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	2917 const SplitInfo& split_info = _space_info[src_space_id].split_info();
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	2918 if (split_info.dest_region_addr() == dest_addr) {
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	2919 // The partial object ending at the split point contains the first word to
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	2920 // be copied to dest_addr.
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	2921 return split_info.first_src_addr();
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	2922 }
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	2923
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	2924 const ParallelCompactData& sd = summary_data();
0 a61af66fc99e Initial load duke parents: diff changeset	2925 ParMarkBitMap* const bitmap = mark_bitmap();
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2926 const size_t RegionSize = ParallelCompactData::RegionSize;
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2927
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2928 assert(sd.is_region_aligned(dest_addr), "not aligned");
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2929 const RegionData* const src_region_ptr = sd.region(src_region_idx);
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2930 const size_t partial_obj_size = src_region_ptr->partial_obj_size();
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2931 HeapWord* const src_region_destination = src_region_ptr->destination();
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2932
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2933 assert(dest_addr >= src_region_destination, "wrong src region");
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2934 assert(src_region_ptr->data_size() > 0, "src region cannot be empty");
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2935
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2936 HeapWord* const src_region_beg = sd.region_to_addr(src_region_idx);
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2937 HeapWord* const src_region_end = src_region_beg + RegionSize;
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2938
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2939 HeapWord* addr = src_region_beg;
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2940 if (dest_addr == src_region_destination) {
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2941 // Return the first live word in the source region.
0 a61af66fc99e Initial load duke parents: diff changeset	2942 if (partial_obj_size == 0) {
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2943 addr = bitmap->find_obj_beg(addr, src_region_end);
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2944 assert(addr < src_region_end, "no objects start in src region");
0 a61af66fc99e Initial load duke parents: diff changeset	2945 }
a61af66fc99e Initial load duke parents: diff changeset	2946 return addr;
a61af66fc99e Initial load duke parents: diff changeset	2947 }
a61af66fc99e Initial load duke parents: diff changeset	2948
a61af66fc99e Initial load duke parents: diff changeset	2949 // Must skip some live data.
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2950 size_t words_to_skip = dest_addr - src_region_destination;
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2951 assert(src_region_ptr->data_size() > words_to_skip, "wrong src region");
0 a61af66fc99e Initial load duke parents: diff changeset	2952
a61af66fc99e Initial load duke parents: diff changeset	2953 if (partial_obj_size >= words_to_skip) {
a61af66fc99e Initial load duke parents: diff changeset	2954 // All the live words to skip are part of the partial object.
a61af66fc99e Initial load duke parents: diff changeset	2955 addr += words_to_skip;
a61af66fc99e Initial load duke parents: diff changeset	2956 if (partial_obj_size == words_to_skip) {
a61af66fc99e Initial load duke parents: diff changeset	2957 // Find the first live word past the partial object.
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2958 addr = bitmap->find_obj_beg(addr, src_region_end);
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2959 assert(addr < src_region_end, "wrong src region");
0 a61af66fc99e Initial load duke parents: diff changeset	2960 }
a61af66fc99e Initial load duke parents: diff changeset	2961 return addr;
a61af66fc99e Initial load duke parents: diff changeset	2962 }
a61af66fc99e Initial load duke parents: diff changeset	2963
a61af66fc99e Initial load duke parents: diff changeset	2964 // Skip over the partial object (if any).
a61af66fc99e Initial load duke parents: diff changeset	2965 if (partial_obj_size != 0) {
a61af66fc99e Initial load duke parents: diff changeset	2966 words_to_skip -= partial_obj_size;
a61af66fc99e Initial load duke parents: diff changeset	2967 addr += partial_obj_size;
a61af66fc99e Initial load duke parents: diff changeset	2968 }
a61af66fc99e Initial load duke parents: diff changeset	2969
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2970 // Skip over live words due to objects that start in the region.
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2971 addr = skip_live_words(addr, src_region_end, words_to_skip);
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2972 assert(addr < src_region_end, "wrong src region");
0 a61af66fc99e Initial load duke parents: diff changeset	2973 return addr;
a61af66fc99e Initial load duke parents: diff changeset	2974 }
a61af66fc99e Initial load duke parents: diff changeset	2975
a61af66fc99e Initial load duke parents: diff changeset	2976 void PSParallelCompact::decrement_destination_counts(ParCompactionManager* cm,
495 234c22e54b98 6784849: par compact - can fail when to_space is non-empty jcoomes parents: 483 diff changeset	2977 SpaceId src_space_id,
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2978 size_t beg_region,
0 a61af66fc99e Initial load duke parents: diff changeset	2979 HeapWord* end_addr)
a61af66fc99e Initial load duke parents: diff changeset	2980 {
a61af66fc99e Initial load duke parents: diff changeset	2981 ParallelCompactData& sd = summary_data();
495 234c22e54b98 6784849: par compact - can fail when to_space is non-empty jcoomes parents: 483 diff changeset	2982
234c22e54b98 6784849: par compact - can fail when to_space is non-empty jcoomes parents: 483 diff changeset	2983 #ifdef ASSERT
234c22e54b98 6784849: par compact - can fail when to_space is non-empty jcoomes parents: 483 diff changeset	2984 MutableSpace* const src_space = _space_info[src_space_id].space();
234c22e54b98 6784849: par compact - can fail when to_space is non-empty jcoomes parents: 483 diff changeset	2985 HeapWord* const beg_addr = sd.region_to_addr(beg_region);
234c22e54b98 6784849: par compact - can fail when to_space is non-empty jcoomes parents: 483 diff changeset	2986 assert(src_space->contains(beg_addr) \|\| beg_addr == src_space->end(),
234c22e54b98 6784849: par compact - can fail when to_space is non-empty jcoomes parents: 483 diff changeset	2987 "src_space_id does not match beg_addr");
234c22e54b98 6784849: par compact - can fail when to_space is non-empty jcoomes parents: 483 diff changeset	2988 assert(src_space->contains(end_addr) \|\| end_addr == src_space->end(),
234c22e54b98 6784849: par compact - can fail when to_space is non-empty jcoomes parents: 483 diff changeset	2989 "src_space_id does not match end_addr");
234c22e54b98 6784849: par compact - can fail when to_space is non-empty jcoomes parents: 483 diff changeset	2990 #endif // #ifdef ASSERT
234c22e54b98 6784849: par compact - can fail when to_space is non-empty jcoomes parents: 483 diff changeset	2991
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2992 RegionData* const beg = sd.region(beg_region);
495 234c22e54b98 6784849: par compact - can fail when to_space is non-empty jcoomes parents: 483 diff changeset	2993 RegionData* const end = sd.addr_to_region_ptr(sd.region_align_up(end_addr));
234c22e54b98 6784849: par compact - can fail when to_space is non-empty jcoomes parents: 483 diff changeset	2994
234c22e54b98 6784849: par compact - can fail when to_space is non-empty jcoomes parents: 483 diff changeset	2995 // Regions up to new_top() are enqueued if they become available.
234c22e54b98 6784849: par compact - can fail when to_space is non-empty jcoomes parents: 483 diff changeset	2996 HeapWord* const new_top = _space_info[src_space_id].new_top();
234c22e54b98 6784849: par compact - can fail when to_space is non-empty jcoomes parents: 483 diff changeset	2997 RegionData* const enqueue_end =
234c22e54b98 6784849: par compact - can fail when to_space is non-empty jcoomes parents: 483 diff changeset	2998 sd.addr_to_region_ptr(sd.region_align_up(new_top));
234c22e54b98 6784849: par compact - can fail when to_space is non-empty jcoomes parents: 483 diff changeset	2999
234c22e54b98 6784849: par compact - can fail when to_space is non-empty jcoomes parents: 483 diff changeset	3000 for (RegionData* cur = beg; cur < end; ++cur) {
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3001 assert(cur->data_size() > 0, "region must have live data");
0 a61af66fc99e Initial load duke parents: diff changeset	3002 cur->decrement_destination_count();
495 234c22e54b98 6784849: par compact - can fail when to_space is non-empty jcoomes parents: 483 diff changeset	3003 if (cur < enqueue_end && cur->available() && cur->claim()) {
1638 b2a00dd3117c 6957084: simplify TaskQueue overflow handling jcoomes parents: 1579 diff changeset	3004 cm->push_region(sd.region(cur));
0 a61af66fc99e Initial load duke parents: diff changeset	3005 }
a61af66fc99e Initial load duke parents: diff changeset	3006 }
a61af66fc99e Initial load duke parents: diff changeset	3007 }
a61af66fc99e Initial load duke parents: diff changeset	3008
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3009 size_t PSParallelCompact::next_src_region(MoveAndUpdateClosure& closure,
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3010 SpaceId& src_space_id,
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3011 HeapWord*& src_space_top,
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3012 HeapWord* end_addr)
0 a61af66fc99e Initial load duke parents: diff changeset	3013 {
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3014 typedef ParallelCompactData::RegionData RegionData;
0 a61af66fc99e Initial load duke parents: diff changeset	3015
a61af66fc99e Initial load duke parents: diff changeset	3016 ParallelCompactData& sd = PSParallelCompact::summary_data();
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3017 const size_t region_size = ParallelCompactData::RegionSize;
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3018
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3019 size_t src_region_idx = 0;
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3020
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3021 // Skip empty regions (if any) up to the top of the space.
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3022 HeapWord* const src_aligned_up = sd.region_align_up(end_addr);
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3023 RegionData* src_region_ptr = sd.addr_to_region_ptr(src_aligned_up);
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3024 HeapWord* const top_aligned_up = sd.region_align_up(src_space_top);
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3025 const RegionData* const top_region_ptr =
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3026 sd.addr_to_region_ptr(top_aligned_up);
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3027 while (src_region_ptr < top_region_ptr && src_region_ptr->data_size() == 0) {
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3028 ++src_region_ptr;
0 a61af66fc99e Initial load duke parents: diff changeset	3029 }
a61af66fc99e Initial load duke parents: diff changeset	3030
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3031 if (src_region_ptr < top_region_ptr) {
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3032 // The next source region is in the current space. Update src_region_idx
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3033 // and the source address to match src_region_ptr.
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3034 src_region_idx = sd.region(src_region_ptr);
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3035 HeapWord* const src_region_addr = sd.region_to_addr(src_region_idx);
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3036 if (src_region_addr > closure.source()) {
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3037 closure.set_source(src_region_addr);
0 a61af66fc99e Initial load duke parents: diff changeset	3038 }
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3039 return src_region_idx;
0 a61af66fc99e Initial load duke parents: diff changeset	3040 }
a61af66fc99e Initial load duke parents: diff changeset	3041
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3042 // Switch to a new source space and find the first non-empty region.
0 a61af66fc99e Initial load duke parents: diff changeset	3043 unsigned int space_id = src_space_id + 1;
a61af66fc99e Initial load duke parents: diff changeset	3044 assert(space_id < last_space_id, "not enough spaces");
a61af66fc99e Initial load duke parents: diff changeset	3045
a61af66fc99e Initial load duke parents: diff changeset	3046 HeapWord* const destination = closure.destination();
a61af66fc99e Initial load duke parents: diff changeset	3047
a61af66fc99e Initial load duke parents: diff changeset	3048 do {
a61af66fc99e Initial load duke parents: diff changeset	3049 MutableSpace* space = _space_info[space_id].space();
a61af66fc99e Initial load duke parents: diff changeset	3050 HeapWord* const bottom = space->bottom();
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3051 const RegionData* const bottom_cp = sd.addr_to_region_ptr(bottom);
0 a61af66fc99e Initial load duke parents: diff changeset	3052
a61af66fc99e Initial load duke parents: diff changeset	3053 // Iterate over the spaces that do not compact into themselves.
a61af66fc99e Initial load duke parents: diff changeset	3054 if (bottom_cp->destination() != bottom) {
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3055 HeapWord* const top_aligned_up = sd.region_align_up(space->top());
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3056 const RegionData* const top_cp = sd.addr_to_region_ptr(top_aligned_up);
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3057
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3058 for (const RegionData* src_cp = bottom_cp; src_cp < top_cp; ++src_cp) {
0 a61af66fc99e Initial load duke parents: diff changeset	3059 if (src_cp->live_obj_size() > 0) {
a61af66fc99e Initial load duke parents: diff changeset	3060 // Found it.
a61af66fc99e Initial load duke parents: diff changeset	3061 assert(src_cp->destination() == destination,
a61af66fc99e Initial load duke parents: diff changeset	3062 "first live obj in the space must match the destination");
a61af66fc99e Initial load duke parents: diff changeset	3063 assert(src_cp->partial_obj_size() == 0,
a61af66fc99e Initial load duke parents: diff changeset	3064 "a space cannot begin with a partial obj");
a61af66fc99e Initial load duke parents: diff changeset	3065
a61af66fc99e Initial load duke parents: diff changeset	3066 src_space_id = SpaceId(space_id);
a61af66fc99e Initial load duke parents: diff changeset	3067 src_space_top = space->top();
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3068 const size_t src_region_idx = sd.region(src_cp);
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3069 closure.set_source(sd.region_to_addr(src_region_idx));
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3070 return src_region_idx;
0 a61af66fc99e Initial load duke parents: diff changeset	3071 } else {
a61af66fc99e Initial load duke parents: diff changeset	3072 assert(src_cp->data_size() == 0, "sanity");
a61af66fc99e Initial load duke parents: diff changeset	3073 }
a61af66fc99e Initial load duke parents: diff changeset	3074 }
a61af66fc99e Initial load duke parents: diff changeset	3075 }
a61af66fc99e Initial load duke parents: diff changeset	3076 } while (++space_id < last_space_id);
a61af66fc99e Initial load duke parents: diff changeset	3077
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3078 assert(false, "no source region was found");
0 a61af66fc99e Initial load duke parents: diff changeset	3079 return 0;
a61af66fc99e Initial load duke parents: diff changeset	3080 }
a61af66fc99e Initial load duke parents: diff changeset	3081
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3082 void PSParallelCompact::fill_region(ParCompactionManager* cm, size_t region_idx)
0 a61af66fc99e Initial load duke parents: diff changeset	3083 {
a61af66fc99e Initial load duke parents: diff changeset	3084 typedef ParMarkBitMap::IterationStatus IterationStatus;
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3085 const size_t RegionSize = ParallelCompactData::RegionSize;
0 a61af66fc99e Initial load duke parents: diff changeset	3086 ParMarkBitMap* const bitmap = mark_bitmap();
a61af66fc99e Initial load duke parents: diff changeset	3087 ParallelCompactData& sd = summary_data();
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3088 RegionData* const region_ptr = sd.region(region_idx);
0 a61af66fc99e Initial load duke parents: diff changeset	3089
a61af66fc99e Initial load duke parents: diff changeset	3090 // Get the items needed to construct the closure.
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3091 HeapWord* dest_addr = sd.region_to_addr(region_idx);
0 a61af66fc99e Initial load duke parents: diff changeset	3092 SpaceId dest_space_id = space_id(dest_addr);
a61af66fc99e Initial load duke parents: diff changeset	3093 ObjectStartArray* start_array = _space_info[dest_space_id].start_array();
a61af66fc99e Initial load duke parents: diff changeset	3094 HeapWord* new_top = _space_info[dest_space_id].new_top();
a61af66fc99e Initial load duke parents: diff changeset	3095 assert(dest_addr < new_top, "sanity");
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3096 const size_t words = MIN2(pointer_delta(new_top, dest_addr), RegionSize);
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3097
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3098 // Get the source region and related info.
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3099 size_t src_region_idx = region_ptr->source_region();
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3100 SpaceId src_space_id = space_id(sd.region_to_addr(src_region_idx));
0 a61af66fc99e Initial load duke parents: diff changeset	3101 HeapWord* src_space_top = _space_info[src_space_id].space()->top();
a61af66fc99e Initial load duke parents: diff changeset	3102
a61af66fc99e Initial load duke parents: diff changeset	3103 MoveAndUpdateClosure closure(bitmap, cm, start_array, dest_addr, words);
482 7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	3104 closure.set_source(first_src_addr(dest_addr, src_space_id, src_region_idx));
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3105
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3106 // Adjust src_region_idx to prepare for decrementing destination counts (the
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3107 // destination count is not decremented when a region is copied to itself).
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3108 if (src_region_idx == region_idx) {
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3109 src_region_idx += 1;
0 a61af66fc99e Initial load duke parents: diff changeset	3110 }
a61af66fc99e Initial load duke parents: diff changeset	3111
a61af66fc99e Initial load duke parents: diff changeset	3112 if (bitmap->is_unmarked(closure.source())) {
a61af66fc99e Initial load duke parents: diff changeset	3113 // The first source word is in the middle of an object; copy the remainder
a61af66fc99e Initial load duke parents: diff changeset	3114 // of the object or as much as will fit. The fact that pointer updates were
a61af66fc99e Initial load duke parents: diff changeset	3115 // deferred will be noted when the object header is processed.
a61af66fc99e Initial load duke parents: diff changeset	3116 HeapWord* const old_src_addr = closure.source();
a61af66fc99e Initial load duke parents: diff changeset	3117 closure.copy_partial_obj();
a61af66fc99e Initial load duke parents: diff changeset	3118 if (closure.is_full()) {
495 234c22e54b98 6784849: par compact - can fail when to_space is non-empty jcoomes parents: 483 diff changeset	3119 decrement_destination_counts(cm, src_space_id, src_region_idx,
234c22e54b98 6784849: par compact - can fail when to_space is non-empty jcoomes parents: 483 diff changeset	3120 closure.source());
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3121 region_ptr->set_deferred_obj_addr(NULL);
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3122 region_ptr->set_completed();
0 a61af66fc99e Initial load duke parents: diff changeset	3123 return;
a61af66fc99e Initial load duke parents: diff changeset	3124 }
a61af66fc99e Initial load duke parents: diff changeset	3125
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3126 HeapWord* const end_addr = sd.region_align_down(closure.source());
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3127 if (sd.region_align_down(old_src_addr) != end_addr) {
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3128 // The partial object was copied from more than one source region.
495 234c22e54b98 6784849: par compact - can fail when to_space is non-empty jcoomes parents: 483 diff changeset	3129 decrement_destination_counts(cm, src_space_id, src_region_idx, end_addr);
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3130
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3131 // Move to the next source region, possibly switching spaces as well. All
0 a61af66fc99e Initial load duke parents: diff changeset	3132 // args except end_addr may be modified.
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3133 src_region_idx = next_src_region(closure, src_space_id, src_space_top,
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3134 end_addr);
0 a61af66fc99e Initial load duke parents: diff changeset	3135 }
a61af66fc99e Initial load duke parents: diff changeset	3136 }
a61af66fc99e Initial load duke parents: diff changeset	3137
a61af66fc99e Initial load duke parents: diff changeset	3138 do {
a61af66fc99e Initial load duke parents: diff changeset	3139 HeapWord* const cur_addr = closure.source();
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3140 HeapWord* const end_addr = MIN2(sd.region_align_up(cur_addr + 1),
0 a61af66fc99e Initial load duke parents: diff changeset	3141 src_space_top);
a61af66fc99e Initial load duke parents: diff changeset	3142 IterationStatus status = bitmap->iterate(&closure, cur_addr, end_addr);
a61af66fc99e Initial load duke parents: diff changeset	3143
a61af66fc99e Initial load duke parents: diff changeset	3144 if (status == ParMarkBitMap::incomplete) {
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3145 // The last obj that starts in the source region does not end in the
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3146 // region.
1489 cff162798819 6888953: some calls to function-like macros are missing semicolons jcoomes parents: 1387 diff changeset	3147 assert(closure.source() < end_addr, "sanity");
0 a61af66fc99e Initial load duke parents: diff changeset	3148 HeapWord* const obj_beg = closure.source();
a61af66fc99e Initial load duke parents: diff changeset	3149 HeapWord* const range_end = MIN2(obj_beg + closure.words_remaining(),
a61af66fc99e Initial load duke parents: diff changeset	3150 src_space_top);
a61af66fc99e Initial load duke parents: diff changeset	3151 HeapWord* const obj_end = bitmap->find_obj_end(obj_beg, range_end);
a61af66fc99e Initial load duke parents: diff changeset	3152 if (obj_end < range_end) {
a61af66fc99e Initial load duke parents: diff changeset	3153 // The end was found; the entire object will fit.
a61af66fc99e Initial load duke parents: diff changeset	3154 status = closure.do_addr(obj_beg, bitmap->obj_size(obj_beg, obj_end));
a61af66fc99e Initial load duke parents: diff changeset	3155 assert(status != ParMarkBitMap::would_overflow, "sanity");
a61af66fc99e Initial load duke parents: diff changeset	3156 } else {
a61af66fc99e Initial load duke parents: diff changeset	3157 // The end was not found; the object will not fit.
a61af66fc99e Initial load duke parents: diff changeset	3158 assert(range_end < src_space_top, "obj cannot cross space boundary");
a61af66fc99e Initial load duke parents: diff changeset	3159 status = ParMarkBitMap::would_overflow;
a61af66fc99e Initial load duke parents: diff changeset	3160 }
a61af66fc99e Initial load duke parents: diff changeset	3161 }
a61af66fc99e Initial load duke parents: diff changeset	3162
a61af66fc99e Initial load duke parents: diff changeset	3163 if (status == ParMarkBitMap::would_overflow) {
a61af66fc99e Initial load duke parents: diff changeset	3164 // The last object did not fit. Note that interior oop updates were
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3165 // deferred, then copy enough of the object to fill the region.
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3166 region_ptr->set_deferred_obj_addr(closure.destination());
0 a61af66fc99e Initial load duke parents: diff changeset	3167 status = closure.copy_until_full(); // copies from closure.source()
a61af66fc99e Initial load duke parents: diff changeset	3168
495 234c22e54b98 6784849: par compact - can fail when to_space is non-empty jcoomes parents: 483 diff changeset	3169 decrement_destination_counts(cm, src_space_id, src_region_idx,
234c22e54b98 6784849: par compact - can fail when to_space is non-empty jcoomes parents: 483 diff changeset	3170 closure.source());
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3171 region_ptr->set_completed();
0 a61af66fc99e Initial load duke parents: diff changeset	3172 return;
a61af66fc99e Initial load duke parents: diff changeset	3173 }
a61af66fc99e Initial load duke parents: diff changeset	3174
a61af66fc99e Initial load duke parents: diff changeset	3175 if (status == ParMarkBitMap::full) {
495 234c22e54b98 6784849: par compact - can fail when to_space is non-empty jcoomes parents: 483 diff changeset	3176 decrement_destination_counts(cm, src_space_id, src_region_idx,
234c22e54b98 6784849: par compact - can fail when to_space is non-empty jcoomes parents: 483 diff changeset	3177 closure.source());
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3178 region_ptr->set_deferred_obj_addr(NULL);
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3179 region_ptr->set_completed();
0 a61af66fc99e Initial load duke parents: diff changeset	3180 return;
a61af66fc99e Initial load duke parents: diff changeset	3181 }
a61af66fc99e Initial load duke parents: diff changeset	3182
495 234c22e54b98 6784849: par compact - can fail when to_space is non-empty jcoomes parents: 483 diff changeset	3183 decrement_destination_counts(cm, src_space_id, src_region_idx, end_addr);
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3184
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3185 // Move to the next source region, possibly switching spaces as well. All
0 a61af66fc99e Initial load duke parents: diff changeset	3186 // args except end_addr may be modified.
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3187 src_region_idx = next_src_region(closure, src_space_id, src_space_top,
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3188 end_addr);
0 a61af66fc99e Initial load duke parents: diff changeset	3189 } while (true);
a61af66fc99e Initial load duke parents: diff changeset	3190 }
a61af66fc99e Initial load duke parents: diff changeset	3191
10369 5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	3192 void PSParallelCompact::fill_blocks(size_t region_idx)
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	3193 {
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	3194 // Fill in the block table elements for the specified region. Each block
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	3195 // table element holds the number of live words in the region that are to the
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	3196 // left of the first object that starts in the block. Thus only blocks in
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	3197 // which an object starts need to be filled.
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	3198 //
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	3199 // The algorithm scans the section of the bitmap that corresponds to the
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	3200 // region, keeping a running total of the live words. When an object start is
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	3201 // found, if it's the first to start in the block that contains it, the
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	3202 // current total is written to the block table element.
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	3203 const size_t Log2BlockSize = ParallelCompactData::Log2BlockSize;
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	3204 const size_t Log2RegionSize = ParallelCompactData::Log2RegionSize;
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	3205 const size_t RegionSize = ParallelCompactData::RegionSize;
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	3206
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	3207 ParallelCompactData& sd = summary_data();
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	3208 const size_t partial_obj_size = sd.region(region_idx)->partial_obj_size();
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	3209 if (partial_obj_size >= RegionSize) {
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	3210 return; // No objects start in this region.
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	3211 }
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	3212
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	3213 // Ensure the first loop iteration decides that the block has changed.
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	3214 size_t cur_block = sd.block_count();
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	3215
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	3216 const ParMarkBitMap* const bitmap = mark_bitmap();
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	3217
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	3218 const size_t Log2BitsPerBlock = Log2BlockSize - LogMinObjAlignment;
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	3219 assert((size_t)1 << Log2BitsPerBlock ==
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	3220 bitmap->words_to_bits(ParallelCompactData::BlockSize), "sanity");
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	3221
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	3222 size_t beg_bit = bitmap->words_to_bits(region_idx << Log2RegionSize);
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	3223 const size_t range_end = beg_bit + bitmap->words_to_bits(RegionSize);
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	3224 size_t live_bits = bitmap->words_to_bits(partial_obj_size);
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	3225 beg_bit = bitmap->find_obj_beg(beg_bit + live_bits, range_end);
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	3226 while (beg_bit < range_end) {
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	3227 const size_t new_block = beg_bit >> Log2BitsPerBlock;
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	3228 if (new_block != cur_block) {
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	3229 cur_block = new_block;
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	3230 sd.block(cur_block)->set_offset(bitmap->bits_to_words(live_bits));
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	3231 }
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	3232
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	3233 const size_t end_bit = bitmap->find_obj_end(beg_bit, range_end);
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	3234 if (end_bit < range_end - 1) {
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	3235 live_bits += end_bit - beg_bit + 1;
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	3236 beg_bit = bitmap->find_obj_beg(end_bit + 1, range_end);
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	3237 } else {
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	3238 return;
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	3239 }
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	3240 }
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	3241 }
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	3242
0 a61af66fc99e Initial load duke parents: diff changeset	3243 void
a61af66fc99e Initial load duke parents: diff changeset	3244 PSParallelCompact::move_and_update(ParCompactionManager* cm, SpaceId space_id) {
a61af66fc99e Initial load duke parents: diff changeset	3245 const MutableSpace* sp = space(space_id);
a61af66fc99e Initial load duke parents: diff changeset	3246 if (sp->is_empty()) {
a61af66fc99e Initial load duke parents: diff changeset	3247 return;
a61af66fc99e Initial load duke parents: diff changeset	3248 }
a61af66fc99e Initial load duke parents: diff changeset	3249
a61af66fc99e Initial load duke parents: diff changeset	3250 ParallelCompactData& sd = PSParallelCompact::summary_data();
a61af66fc99e Initial load duke parents: diff changeset	3251 ParMarkBitMap* const bitmap = mark_bitmap();
a61af66fc99e Initial load duke parents: diff changeset	3252 HeapWord* const dp_addr = dense_prefix(space_id);
a61af66fc99e Initial load duke parents: diff changeset	3253 HeapWord* beg_addr = sp->bottom();
a61af66fc99e Initial load duke parents: diff changeset	3254 HeapWord* end_addr = sp->top();
a61af66fc99e Initial load duke parents: diff changeset	3255
a61af66fc99e Initial load duke parents: diff changeset	3256 assert(beg_addr <= dp_addr && dp_addr <= end_addr, "bad dense prefix");
a61af66fc99e Initial load duke parents: diff changeset	3257
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3258 const size_t beg_region = sd.addr_to_region_idx(beg_addr);
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3259 const size_t dp_region = sd.addr_to_region_idx(dp_addr);
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3260 if (beg_region < dp_region) {
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3261 update_and_deadwood_in_dense_prefix(cm, space_id, beg_region, dp_region);
0 a61af66fc99e Initial load duke parents: diff changeset	3262 }
a61af66fc99e Initial load duke parents: diff changeset	3263
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3264 // The destination of the first live object that starts in the region is one
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3265 // past the end of the partial object entering the region (if any).
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3266 HeapWord* const dest_addr = sd.partial_obj_end(dp_region);
0 a61af66fc99e Initial load duke parents: diff changeset	3267 HeapWord* const new_top = _space_info[space_id].new_top();
a61af66fc99e Initial load duke parents: diff changeset	3268 assert(new_top >= dest_addr, "bad new_top value");
a61af66fc99e Initial load duke parents: diff changeset	3269 const size_t words = pointer_delta(new_top, dest_addr);
a61af66fc99e Initial load duke parents: diff changeset	3270
a61af66fc99e Initial load duke parents: diff changeset	3271 if (words > 0) {
a61af66fc99e Initial load duke parents: diff changeset	3272 ObjectStartArray* start_array = _space_info[space_id].start_array();
a61af66fc99e Initial load duke parents: diff changeset	3273 MoveAndUpdateClosure closure(bitmap, cm, start_array, dest_addr, words);
a61af66fc99e Initial load duke parents: diff changeset	3274
a61af66fc99e Initial load duke parents: diff changeset	3275 ParMarkBitMap::IterationStatus status;
a61af66fc99e Initial load duke parents: diff changeset	3276 status = bitmap->iterate(&closure, dest_addr, end_addr);
a61af66fc99e Initial load duke parents: diff changeset	3277 assert(status == ParMarkBitMap::full, "iteration not complete");
a61af66fc99e Initial load duke parents: diff changeset	3278 assert(bitmap->find_obj_beg(closure.source(), end_addr) == end_addr,
a61af66fc99e Initial load duke parents: diff changeset	3279 "live objects skipped because closure is full");
a61af66fc99e Initial load duke parents: diff changeset	3280 }
a61af66fc99e Initial load duke parents: diff changeset	3281 }
a61af66fc99e Initial load duke parents: diff changeset	3282
a61af66fc99e Initial load duke parents: diff changeset	3283 jlong PSParallelCompact::millis_since_last_gc() {
4712 e7dead7e90af 7117303: VM uses non-monotonic time source and complains that it is non-monotonic johnc parents: 4099 diff changeset	3284 // We need a monotonically non-deccreasing time in ms but
e7dead7e90af 7117303: VM uses non-monotonic time source and complains that it is non-monotonic johnc parents: 4099 diff changeset	3285 // os::javaTimeMillis() does not guarantee monotonicity.
e7dead7e90af 7117303: VM uses non-monotonic time source and complains that it is non-monotonic johnc parents: 4099 diff changeset	3286 jlong now = os::javaTimeNanos() / NANOSECS_PER_MILLISEC;
e7dead7e90af 7117303: VM uses non-monotonic time source and complains that it is non-monotonic johnc parents: 4099 diff changeset	3287 jlong ret_val = now - _time_of_last_gc;
0 a61af66fc99e Initial load duke parents: diff changeset	3288 // XXX See note in genCollectedHeap::millis_since_last_gc().
a61af66fc99e Initial load duke parents: diff changeset	3289 if (ret_val < 0) {
4712 e7dead7e90af 7117303: VM uses non-monotonic time source and complains that it is non-monotonic johnc parents: 4099 diff changeset	3290 NOT_PRODUCT(warning("time warp: "INT64_FORMAT, ret_val);)
0 a61af66fc99e Initial load duke parents: diff changeset	3291 return 0;
a61af66fc99e Initial load duke parents: diff changeset	3292 }
a61af66fc99e Initial load duke parents: diff changeset	3293 return ret_val;
a61af66fc99e Initial load duke parents: diff changeset	3294 }
a61af66fc99e Initial load duke parents: diff changeset	3295
a61af66fc99e Initial load duke parents: diff changeset	3296 void PSParallelCompact::reset_millis_since_last_gc() {
4712 e7dead7e90af 7117303: VM uses non-monotonic time source and complains that it is non-monotonic johnc parents: 4099 diff changeset	3297 // We need a monotonically non-deccreasing time in ms but
e7dead7e90af 7117303: VM uses non-monotonic time source and complains that it is non-monotonic johnc parents: 4099 diff changeset	3298 // os::javaTimeMillis() does not guarantee monotonicity.
e7dead7e90af 7117303: VM uses non-monotonic time source and complains that it is non-monotonic johnc parents: 4099 diff changeset	3299 _time_of_last_gc = os::javaTimeNanos() / NANOSECS_PER_MILLISEC;
0 a61af66fc99e Initial load duke parents: diff changeset	3300 }
a61af66fc99e Initial load duke parents: diff changeset	3301
a61af66fc99e Initial load duke parents: diff changeset	3302 ParMarkBitMap::IterationStatus MoveAndUpdateClosure::copy_until_full()
a61af66fc99e Initial load duke parents: diff changeset	3303 {
a61af66fc99e Initial load duke parents: diff changeset	3304 if (source() != destination()) {
495 234c22e54b98 6784849: par compact - can fail when to_space is non-empty jcoomes parents: 483 diff changeset	3305 DEBUG_ONLY(PSParallelCompact::check_new_location(source(), destination());)
0 a61af66fc99e Initial load duke parents: diff changeset	3306 Copy::aligned_conjoint_words(source(), destination(), words_remaining());
a61af66fc99e Initial load duke parents: diff changeset	3307 }
a61af66fc99e Initial load duke parents: diff changeset	3308 update_state(words_remaining());
a61af66fc99e Initial load duke parents: diff changeset	3309 assert(is_full(), "sanity");
a61af66fc99e Initial load duke parents: diff changeset	3310 return ParMarkBitMap::full;
a61af66fc99e Initial load duke parents: diff changeset	3311 }
a61af66fc99e Initial load duke parents: diff changeset	3312
a61af66fc99e Initial load duke parents: diff changeset	3313 void MoveAndUpdateClosure::copy_partial_obj()
a61af66fc99e Initial load duke parents: diff changeset	3314 {
a61af66fc99e Initial load duke parents: diff changeset	3315 size_t words = words_remaining();
a61af66fc99e Initial load duke parents: diff changeset	3316
a61af66fc99e Initial load duke parents: diff changeset	3317 HeapWord* const range_end = MIN2(source() + words, bitmap()->region_end());
a61af66fc99e Initial load duke parents: diff changeset	3318 HeapWord* const end_addr = bitmap()->find_obj_end(source(), range_end);
a61af66fc99e Initial load duke parents: diff changeset	3319 if (end_addr < range_end) {
a61af66fc99e Initial load duke parents: diff changeset	3320 words = bitmap()->obj_size(source(), end_addr);
a61af66fc99e Initial load duke parents: diff changeset	3321 }
a61af66fc99e Initial load duke parents: diff changeset	3322
a61af66fc99e Initial load duke parents: diff changeset	3323 // This test is necessary; if omitted, the pointer updates to a partial object
a61af66fc99e Initial load duke parents: diff changeset	3324 // that crosses the dense prefix boundary could be overwritten.
a61af66fc99e Initial load duke parents: diff changeset	3325 if (source() != destination()) {
495 234c22e54b98 6784849: par compact - can fail when to_space is non-empty jcoomes parents: 483 diff changeset	3326 DEBUG_ONLY(PSParallelCompact::check_new_location(source(), destination());)
0 a61af66fc99e Initial load duke parents: diff changeset	3327 Copy::aligned_conjoint_words(source(), destination(), words);
a61af66fc99e Initial load duke parents: diff changeset	3328 }
a61af66fc99e Initial load duke parents: diff changeset	3329 update_state(words);
a61af66fc99e Initial load duke parents: diff changeset	3330 }
a61af66fc99e Initial load duke parents: diff changeset	3331
a61af66fc99e Initial load duke parents: diff changeset	3332 ParMarkBitMapClosure::IterationStatus
a61af66fc99e Initial load duke parents: diff changeset	3333 MoveAndUpdateClosure::do_addr(HeapWord* addr, size_t words) {
a61af66fc99e Initial load duke parents: diff changeset	3334 assert(destination() != NULL, "sanity");
a61af66fc99e Initial load duke parents: diff changeset	3335 assert(bitmap()->obj_size(addr) == words, "bad size");
a61af66fc99e Initial load duke parents: diff changeset	3336
a61af66fc99e Initial load duke parents: diff changeset	3337 _source = addr;
a61af66fc99e Initial load duke parents: diff changeset	3338 assert(PSParallelCompact::summary_data().calc_new_pointer(source()) ==
a61af66fc99e Initial load duke parents: diff changeset	3339 destination(), "wrong destination");
a61af66fc99e Initial load duke parents: diff changeset	3340
a61af66fc99e Initial load duke parents: diff changeset	3341 if (words > words_remaining()) {
a61af66fc99e Initial load duke parents: diff changeset	3342 return ParMarkBitMap::would_overflow;
a61af66fc99e Initial load duke parents: diff changeset	3343 }
a61af66fc99e Initial load duke parents: diff changeset	3344
a61af66fc99e Initial load duke parents: diff changeset	3345 // The start_array must be updated even if the object is not moving.
a61af66fc99e Initial load duke parents: diff changeset	3346 if (_start_array != NULL) {
a61af66fc99e Initial load duke parents: diff changeset	3347 _start_array->allocate_block(destination());
a61af66fc99e Initial load duke parents: diff changeset	3348 }
a61af66fc99e Initial load duke parents: diff changeset	3349
a61af66fc99e Initial load duke parents: diff changeset	3350 if (destination() != source()) {
495 234c22e54b98 6784849: par compact - can fail when to_space is non-empty jcoomes parents: 483 diff changeset	3351 DEBUG_ONLY(PSParallelCompact::check_new_location(source(), destination());)
0 a61af66fc99e Initial load duke parents: diff changeset	3352 Copy::aligned_conjoint_words(source(), destination(), words);
a61af66fc99e Initial load duke parents: diff changeset	3353 }
a61af66fc99e Initial load duke parents: diff changeset	3354
a61af66fc99e Initial load duke parents: diff changeset	3355 oop moved_oop = (oop) destination();
a61af66fc99e Initial load duke parents: diff changeset	3356 moved_oop->update_contents(compaction_manager());
a61af66fc99e Initial load duke parents: diff changeset	3357 assert(moved_oop->is_oop_or_null(), "Object should be whole at this point");
a61af66fc99e Initial load duke parents: diff changeset	3358
a61af66fc99e Initial load duke parents: diff changeset	3359 update_state(words);
a61af66fc99e Initial load duke parents: diff changeset	3360 assert(destination() == (HeapWord*)moved_oop + moved_oop->size(), "sanity");
a61af66fc99e Initial load duke parents: diff changeset	3361 return is_full() ? ParMarkBitMap::full : ParMarkBitMap::incomplete;
a61af66fc99e Initial load duke parents: diff changeset	3362 }
a61af66fc99e Initial load duke parents: diff changeset	3363
a61af66fc99e Initial load duke parents: diff changeset	3364 UpdateOnlyClosure::UpdateOnlyClosure(ParMarkBitMap* mbm,
a61af66fc99e Initial load duke parents: diff changeset	3365 ParCompactionManager* cm,
a61af66fc99e Initial load duke parents: diff changeset	3366 PSParallelCompact::SpaceId space_id) :
a61af66fc99e Initial load duke parents: diff changeset	3367 ParMarkBitMapClosure(mbm, cm),
a61af66fc99e Initial load duke parents: diff changeset	3368 _space_id(space_id),
a61af66fc99e Initial load duke parents: diff changeset	3369 _start_array(PSParallelCompact::start_array(space_id))
a61af66fc99e Initial load duke parents: diff changeset	3370 {
a61af66fc99e Initial load duke parents: diff changeset	3371 }
a61af66fc99e Initial load duke parents: diff changeset	3372
a61af66fc99e Initial load duke parents: diff changeset	3373 // Updates the references in the object to their new values.
a61af66fc99e Initial load duke parents: diff changeset	3374 ParMarkBitMapClosure::IterationStatus
a61af66fc99e Initial load duke parents: diff changeset	3375 UpdateOnlyClosure::do_addr(HeapWord* addr, size_t words) {
a61af66fc99e Initial load duke parents: diff changeset	3376 do_addr(addr);
a61af66fc99e Initial load duke parents: diff changeset	3377 return ParMarkBitMap::incomplete;
a61af66fc99e Initial load duke parents: diff changeset	3378 }

Mercurial > hg > graal-compiler

annotate src/share/vm/gc_implementation/parallelScavenge/psParallelCompact.cpp @ 10369:5534bd30c151