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

annotate src/share/vm/gc_implementation/parallelScavenge/psParallelCompact.cpp @ 14309:63a4eb8bcd23

8025856: Fix typos in the GC code Summary: Fix about 440 typos in comments in the VM code Reviewed-by: mgerdin, tschatzl, coleenp, kmo, jcoomes

author	jwilhelm
date	Thu, 23 Jan 2014 14:47:23 +0100
parents	397385cc2c83
children	e9ca52f59632 4ca6dc0799b6

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/parallelScavengeHeap.inline.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1836 diff changeset	31 #include "gc_implementation/parallelScavenge/pcTasks.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1836 diff changeset	32 #include "gc_implementation/parallelScavenge/psAdaptiveSizePolicy.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1836 diff changeset	33 #include "gc_implementation/parallelScavenge/psCompactionManager.inline.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1836 diff changeset	34 #include "gc_implementation/parallelScavenge/psMarkSweep.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1836 diff changeset	35 #include "gc_implementation/parallelScavenge/psMarkSweepDecorator.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1836 diff changeset	36 #include "gc_implementation/parallelScavenge/psOldGen.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1836 diff changeset	37 #include "gc_implementation/parallelScavenge/psParallelCompact.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1836 diff changeset	38 #include "gc_implementation/parallelScavenge/psPromotionManager.inline.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1836 diff changeset	39 #include "gc_implementation/parallelScavenge/psScavenge.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1836 diff changeset	40 #include "gc_implementation/parallelScavenge/psYoungGen.hpp"
10405 f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10369 diff changeset	41 #include "gc_implementation/shared/gcHeapSummary.hpp"
f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10369 diff changeset	42 #include "gc_implementation/shared/gcTimer.hpp"
f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10369 diff changeset	43 #include "gc_implementation/shared/gcTrace.hpp"
f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10369 diff changeset	44 #include "gc_implementation/shared/gcTraceTime.hpp"
1972 f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1836 diff changeset	45 #include "gc_implementation/shared/isGCActiveMark.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1836 diff changeset	46 #include "gc_interface/gcCause.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1836 diff changeset	47 #include "memory/gcLocker.inline.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1836 diff changeset	48 #include "memory/referencePolicy.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1836 diff changeset	49 #include "memory/referenceProcessor.hpp"
6725 da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	50 #include "oops/methodData.hpp"
1972 f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1836 diff changeset	51 #include "oops/oop.inline.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1836 diff changeset	52 #include "oops/oop.pcgc.inline.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1836 diff changeset	53 #include "runtime/fprofiler.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1836 diff changeset	54 #include "runtime/safepoint.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1836 diff changeset	55 #include "runtime/vmThread.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1836 diff changeset	56 #include "services/management.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1836 diff changeset	57 #include "services/memoryService.hpp"
6197 d2a62e0f25eb 6995781: Native Memory Tracking (Phase 1) zgu parents: 6064 diff changeset	58 #include "services/memTracker.hpp"
1972 f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1836 diff changeset	59 #include "utilities/events.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1836 diff changeset	60 #include "utilities/stack.inline.hpp"
0 a61af66fc99e Initial load duke parents: diff changeset	61
a61af66fc99e Initial load duke parents: diff changeset	62 #include <math.h>
a61af66fc99e Initial load duke parents: diff changeset	63
a61af66fc99e Initial load duke parents: diff changeset	64 // All sizes are in HeapWords.
10369 5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	65 const size_t ParallelCompactData::Log2RegionSize = 16; // 64K words
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	66 const size_t ParallelCompactData::RegionSize = (size_t)1 << Log2RegionSize;
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	67 const size_t ParallelCompactData::RegionSizeBytes =
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	68 RegionSize << LogHeapWordSize;
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	69 const size_t ParallelCompactData::RegionSizeOffsetMask = RegionSize - 1;
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	70 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	71 const size_t ParallelCompactData::RegionAddrMask = ~RegionAddrOffsetMask;
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	72
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	73 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	74 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	75 const size_t ParallelCompactData::BlockSizeBytes =
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	76 BlockSize << LogHeapWordSize;
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	77 const size_t ParallelCompactData::BlockSizeOffsetMask = BlockSize - 1;
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	78 const size_t ParallelCompactData::BlockAddrOffsetMask = BlockSizeBytes - 1;
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	79 const size_t ParallelCompactData::BlockAddrMask = ~BlockAddrOffsetMask;
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	80
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	81 const size_t ParallelCompactData::BlocksPerRegion = RegionSize / BlockSize;
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	82 const size_t ParallelCompactData::Log2BlocksPerRegion =
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	83 Log2RegionSize - Log2BlockSize;
0 a61af66fc99e Initial load duke parents: diff changeset	84
375 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_shift = 27;
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_mask = ~0U << 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::dc_one = 0x1U << dc_shift;
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::los_mask = ~dc_mask;
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_claimed = 0x8U << dc_shift;
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	99
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	100 const ParallelCompactData::RegionData::region_sz_t
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	101 ParallelCompactData::RegionData::dc_completed = 0xcU << dc_shift;
0 a61af66fc99e Initial load duke parents: diff changeset	102
a61af66fc99e Initial load duke parents: diff changeset	103 SpaceInfo PSParallelCompact::_space_info[PSParallelCompact::last_space_id];
a61af66fc99e Initial load duke parents: diff changeset	104 bool PSParallelCompact::_print_phases = false;
a61af66fc99e Initial load duke parents: diff changeset	105
a61af66fc99e Initial load duke parents: diff changeset	106 ReferenceProcessor* PSParallelCompact::_ref_processor = NULL;
6725 da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	107 Klass* PSParallelCompact::_updated_int_array_klass_obj = NULL;
0 a61af66fc99e Initial load duke parents: diff changeset	108
a61af66fc99e Initial load duke parents: diff changeset	109 double PSParallelCompact::_dwl_mean;
a61af66fc99e Initial load duke parents: diff changeset	110 double PSParallelCompact::_dwl_std_dev;
a61af66fc99e Initial load duke parents: diff changeset	111 double PSParallelCompact::_dwl_first_term;
a61af66fc99e Initial load duke parents: diff changeset	112 double PSParallelCompact::_dwl_adjustment;
a61af66fc99e Initial load duke parents: diff changeset	113 #ifdef ASSERT
a61af66fc99e Initial load duke parents: diff changeset	114 bool PSParallelCompact::_dwl_initialized = false;
a61af66fc99e Initial load duke parents: diff changeset	115 #endif // #ifdef ASSERT
a61af66fc99e Initial load duke parents: diff changeset	116
482 7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	117 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	118 HeapWord* destination)
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	119 {
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	120 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	121 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	122 assert(destination != NULL, "invalid destination argument");
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	123
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	124 _src_region_idx = src_region_idx;
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	125 _partial_obj_size = partial_obj_size;
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	126 _destination = destination;
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	127
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	128 // 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	129 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	130 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	131
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	132 // 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	133 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	134 const ParallelCompactData& sd = PSParallelCompact::summary_data();
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	135 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	136 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	137
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	138 if (beg_region_addr == end_region_addr) {
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	139 // One destination region.
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	140 _destination_count = 1;
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	141 if (end_region_addr == destination) {
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	142 // 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	143 // 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	144 _dest_region_addr = end_region_addr;
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	145 _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	146 }
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	147 } else {
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	148 // 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	149 // 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	150 // 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	151 _destination_count = 2;
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	152 _dest_region_addr = end_region_addr;
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	153 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	154 assert(ofs < _partial_obj_size, "sanity");
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	155 _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	156 }
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
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	159 void SplitInfo::clear()
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	160 {
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	161 _src_region_idx = 0;
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	162 _partial_obj_size = 0;
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	163 _destination = NULL;
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	164 _destination_count = 0;
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	165 _dest_region_addr = NULL;
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	166 _first_src_addr = NULL;
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	167 assert(!is_valid(), "sanity");
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	168 }
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 #ifdef ASSERT
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	171 void SplitInfo::verify_clear()
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	172 {
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	173 assert(_src_region_idx == 0, "not clear");
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	174 assert(_partial_obj_size == 0, "not clear");
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	175 assert(_destination == NULL, "not clear");
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	176 assert(_destination_count == 0, "not clear");
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	177 assert(_dest_region_addr == NULL, "not clear");
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	178 assert(_first_src_addr == NULL, "not clear");
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	179 }
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	180 #endif // #ifdef ASSERT
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	181
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	182
9076 7b835924c31c 8011872: Include Bit Map addresses in the hs_err files stefank parents: 7448 diff changeset	183 void PSParallelCompact::print_on_error(outputStream* st) {
7b835924c31c 8011872: Include Bit Map addresses in the hs_err files stefank parents: 7448 diff changeset	184 _mark_bitmap.print_on_error(st);
7b835924c31c 8011872: Include Bit Map addresses in the hs_err files stefank parents: 7448 diff changeset	185 }
7b835924c31c 8011872: Include Bit Map addresses in the hs_err files stefank parents: 7448 diff changeset	186
0 a61af66fc99e Initial load duke parents: diff changeset	187 #ifndef PRODUCT
a61af66fc99e Initial load duke parents: diff changeset	188 const char* PSParallelCompact::space_names[] = {
6725 da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	189 "old ", "eden", "from", "to "
0 a61af66fc99e Initial load duke parents: diff changeset	190 };
a61af66fc99e Initial load duke parents: diff changeset	191
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	192 void PSParallelCompact::print_region_ranges()
0 a61af66fc99e Initial load duke parents: diff changeset	193 {
a61af66fc99e Initial load duke parents: diff changeset	194 tty->print_cr("space bottom top end new_top");
a61af66fc99e Initial load duke parents: diff changeset	195 tty->print_cr("------ ---------- ---------- ---------- ----------");
a61af66fc99e Initial load duke parents: diff changeset	196
a61af66fc99e Initial load duke parents: diff changeset	197 for (unsigned int id = 0; id < last_space_id; ++id) {
a61af66fc99e Initial load duke parents: diff changeset	198 const MutableSpace* space = _space_info[id].space();
a61af66fc99e Initial load duke parents: diff changeset	199 tty->print_cr("%u %s "
264 15dd2594d08e 6718283: existing uses of _FORMAT_W() were broken by 6521491 jcoomes* parents: 263 diff changeset	200 SIZE_FORMAT_W(10) " " SIZE_FORMAT_W(10) " "
15dd2594d08e 6718283: existing uses of _FORMAT_W() were broken by 6521491 jcoomes* parents: 263 diff changeset	201 SIZE_FORMAT_W(10) " " SIZE_FORMAT_W(10) " ",
0 a61af66fc99e Initial load duke parents: diff changeset	202 id, space_names[id],
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	203 summary_data().addr_to_region_idx(space->bottom()),
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	204 summary_data().addr_to_region_idx(space->top()),
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	205 summary_data().addr_to_region_idx(space->end()),
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	206 summary_data().addr_to_region_idx(_space_info[id].new_top()));
0 a61af66fc99e Initial load duke parents: diff changeset	207 }
a61af66fc99e Initial load duke parents: diff changeset	208 }
a61af66fc99e Initial load duke parents: diff changeset	209
a61af66fc99e Initial load duke parents: diff changeset	210 void
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	211 print_generic_summary_region(size_t i, const ParallelCompactData::RegionData* c)
0 a61af66fc99e Initial load duke parents: diff changeset	212 {
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	213 #define REGION_IDX_FORMAT SIZE_FORMAT_W(7)
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	214 #define REGION_DATA_FORMAT SIZE_FORMAT_W(5)
0 a61af66fc99e Initial load duke parents: diff changeset	215
a61af66fc99e Initial load duke parents: diff changeset	216 ParallelCompactData& sd = PSParallelCompact::summary_data();
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	217 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	218 tty->print_cr(REGION_IDX_FORMAT " " PTR_FORMAT " "
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	219 REGION_IDX_FORMAT " " PTR_FORMAT " "
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	220 REGION_DATA_FORMAT " " REGION_DATA_FORMAT " "
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	221 REGION_DATA_FORMAT " " REGION_IDX_FORMAT " %d",
0 a61af66fc99e Initial load duke parents: diff changeset	222 i, c->data_location(), dci, c->destination(),
a61af66fc99e Initial load duke parents: diff changeset	223 c->partial_obj_size(), c->live_obj_size(),
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	224 c->data_size(), c->source_region(), c->destination_count());
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	225
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	226 #undef REGION_IDX_FORMAT
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	227 #undef REGION_DATA_FORMAT
0 a61af66fc99e Initial load duke parents: diff changeset	228 }
a61af66fc99e Initial load duke parents: diff changeset	229
a61af66fc99e Initial load duke parents: diff changeset	230 void
a61af66fc99e Initial load duke parents: diff changeset	231 print_generic_summary_data(ParallelCompactData& summary_data,
a61af66fc99e Initial load duke parents: diff changeset	232 HeapWord* const beg_addr,
a61af66fc99e Initial load duke parents: diff changeset	233 HeapWord* const end_addr)
a61af66fc99e Initial load duke parents: diff changeset	234 {
a61af66fc99e Initial load duke parents: diff changeset	235 size_t total_words = 0;
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	236 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	237 const size_t last = summary_data.addr_to_region_idx(end_addr);
0 a61af66fc99e Initial load duke parents: diff changeset	238 HeapWord* pdest = 0;
a61af66fc99e Initial load duke parents: diff changeset	239
a61af66fc99e Initial load duke parents: diff changeset	240 while (i <= last) {
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	241 ParallelCompactData::RegionData* c = summary_data.region(i);
0 a61af66fc99e Initial load duke parents: diff changeset	242 if (c->data_size() != 0 \|\| c->destination() != pdest) {
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	243 print_generic_summary_region(i, c);
0 a61af66fc99e Initial load duke parents: diff changeset	244 total_words += c->data_size();
a61af66fc99e Initial load duke parents: diff changeset	245 pdest = c->destination();
a61af66fc99e Initial load duke parents: diff changeset	246 }
a61af66fc99e Initial load duke parents: diff changeset	247 ++i;
a61af66fc99e Initial load duke parents: diff changeset	248 }
a61af66fc99e Initial load duke parents: diff changeset	249
a61af66fc99e Initial load duke parents: diff changeset	250 tty->print_cr("summary_data_bytes=" SIZE_FORMAT, total_words * HeapWordSize);
a61af66fc99e Initial load duke parents: diff changeset	251 }
a61af66fc99e Initial load duke parents: diff changeset	252
a61af66fc99e Initial load duke parents: diff changeset	253 void
a61af66fc99e Initial load duke parents: diff changeset	254 print_generic_summary_data(ParallelCompactData& summary_data,
a61af66fc99e Initial load duke parents: diff changeset	255 SpaceInfo* space_info)
a61af66fc99e Initial load duke parents: diff changeset	256 {
a61af66fc99e Initial load duke parents: diff changeset	257 for (unsigned int id = 0; id < PSParallelCompact::last_space_id; ++id) {
a61af66fc99e Initial load duke parents: diff changeset	258 const MutableSpace* space = space_info[id].space();
a61af66fc99e Initial load duke parents: diff changeset	259 print_generic_summary_data(summary_data, space->bottom(),
a61af66fc99e Initial load duke parents: diff changeset	260 MAX2(space->top(), space_info[id].new_top()));
a61af66fc99e Initial load duke parents: diff changeset	261 }
a61af66fc99e Initial load duke parents: diff changeset	262 }
a61af66fc99e Initial load duke parents: diff changeset	263
a61af66fc99e Initial load duke parents: diff changeset	264 void
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	265 print_initial_summary_region(size_t i,
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	266 const ParallelCompactData::RegionData* c,
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	267 bool newline = true)
0 a61af66fc99e Initial load duke parents: diff changeset	268 {
264 15dd2594d08e 6718283: existing uses of _FORMAT_W() were broken by 6521491 jcoomes* parents: 263 diff changeset	269 tty->print(SIZE_FORMAT_W(5) " " PTR_FORMAT " "
15dd2594d08e 6718283: existing uses of _FORMAT_W() were broken by 6521491 jcoomes* parents: 263 diff changeset	270 SIZE_FORMAT_W(5) " " SIZE_FORMAT_W(5) " "
15dd2594d08e 6718283: existing uses of _FORMAT_W() were broken by 6521491 jcoomes* parents: 263 diff changeset	271 SIZE_FORMAT_W(5) " " SIZE_FORMAT_W(5) " %d",
0 a61af66fc99e Initial load duke parents: diff changeset	272 i, c->destination(),
a61af66fc99e Initial load duke parents: diff changeset	273 c->partial_obj_size(), c->live_obj_size(),
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	274 c->data_size(), c->source_region(), c->destination_count());
0 a61af66fc99e Initial load duke parents: diff changeset	275 if (newline) tty->cr();
a61af66fc99e Initial load duke parents: diff changeset	276 }
a61af66fc99e Initial load duke parents: diff changeset	277
a61af66fc99e Initial load duke parents: diff changeset	278 void
a61af66fc99e Initial load duke parents: diff changeset	279 print_initial_summary_data(ParallelCompactData& summary_data,
a61af66fc99e Initial load duke parents: diff changeset	280 const MutableSpace* space) {
a61af66fc99e Initial load duke parents: diff changeset	281 if (space->top() == space->bottom()) {
a61af66fc99e Initial load duke parents: diff changeset	282 return;
a61af66fc99e Initial load duke parents: diff changeset	283 }
a61af66fc99e Initial load duke parents: diff changeset	284
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	285 const size_t region_size = ParallelCompactData::RegionSize;
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	286 typedef ParallelCompactData::RegionData RegionData;
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	287 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	288 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	289 const RegionData* c = summary_data.region(end_region - 1);
0 a61af66fc99e Initial load duke parents: diff changeset	290 HeapWord* end_addr = c->destination() + c->data_size();
a61af66fc99e Initial load duke parents: diff changeset	291 const size_t live_in_space = pointer_delta(end_addr, space->bottom());
a61af66fc99e Initial load duke parents: diff changeset	292
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	293 // 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	294 size_t full_region_count = 0;
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	295 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	296 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	297 print_initial_summary_region(i, summary_data.region(i));
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	298 ++full_region_count;
0 a61af66fc99e Initial load duke parents: diff changeset	299 ++i;
a61af66fc99e Initial load duke parents: diff changeset	300 }
a61af66fc99e Initial load duke parents: diff changeset	301
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	302 size_t live_to_right = live_in_space - full_region_count * region_size;
0 a61af66fc99e Initial load duke parents: diff changeset	303
a61af66fc99e Initial load duke parents: diff changeset	304 double max_reclaimed_ratio = 0.0;
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	305 size_t max_reclaimed_ratio_region = 0;
0 a61af66fc99e Initial load duke parents: diff changeset	306 size_t max_dead_to_right = 0;
a61af66fc99e Initial load duke parents: diff changeset	307 size_t max_live_to_right = 0;
a61af66fc99e Initial load duke parents: diff changeset	308
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	309 // 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	310 // the region or to the right of it. The remaining regions are empty (and
0 a61af66fc99e Initial load duke parents: diff changeset	311 // 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	312 while (i < end_region && live_to_right > 0) {
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	313 c = summary_data.region(i);
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	314 HeapWord* const region_addr = summary_data.region_to_addr(i);
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	315 const size_t used_to_right = pointer_delta(space->top(), region_addr);
0 a61af66fc99e Initial load duke parents: diff changeset	316 const size_t dead_to_right = used_to_right - live_to_right;
a61af66fc99e Initial load duke parents: diff changeset	317 const double reclaimed_ratio = double(dead_to_right) / live_to_right;
a61af66fc99e Initial load duke parents: diff changeset	318
a61af66fc99e Initial load duke parents: diff changeset	319 if (reclaimed_ratio > max_reclaimed_ratio) {
a61af66fc99e Initial load duke parents: diff changeset	320 max_reclaimed_ratio = reclaimed_ratio;
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	321 max_reclaimed_ratio_region = i;
0 a61af66fc99e Initial load duke parents: diff changeset	322 max_dead_to_right = dead_to_right;
a61af66fc99e Initial load duke parents: diff changeset	323 max_live_to_right = live_to_right;
a61af66fc99e Initial load duke parents: diff changeset	324 }
a61af66fc99e Initial load duke parents: diff changeset	325
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	326 print_initial_summary_region(i, c, false);
264 15dd2594d08e 6718283: existing uses of _FORMAT_W() were broken by 6521491 jcoomes* parents: 263 diff changeset	327 tty->print_cr(" %12.10f " SIZE_FORMAT_W(10) " " SIZE_FORMAT_W(10),
0 a61af66fc99e Initial load duke parents: diff changeset	328 reclaimed_ratio, dead_to_right, live_to_right);
a61af66fc99e Initial load duke parents: diff changeset	329
a61af66fc99e Initial load duke parents: diff changeset	330 live_to_right -= c->data_size();
a61af66fc99e Initial load duke parents: diff changeset	331 ++i;
a61af66fc99e Initial load duke parents: diff changeset	332 }
a61af66fc99e Initial load duke parents: diff changeset	333
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	334 // 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	335 if (i < end_region) {
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	336 print_initial_summary_region(i, summary_data.region(i));
0 a61af66fc99e Initial load duke parents: diff changeset	337 }
a61af66fc99e Initial load duke parents: diff changeset	338
264 15dd2594d08e 6718283: existing uses of _FORMAT_W() were broken by 6521491 jcoomes* parents: 263 diff changeset	339 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	340 "l2r=" SIZE_FORMAT_W(10) " max_ratio=%14.12f",
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	341 max_reclaimed_ratio_region, max_dead_to_right,
0 a61af66fc99e Initial load duke parents: diff changeset	342 max_live_to_right, max_reclaimed_ratio);
a61af66fc99e Initial load duke parents: diff changeset	343 }
a61af66fc99e Initial load duke parents: diff changeset	344
a61af66fc99e Initial load duke parents: diff changeset	345 void
a61af66fc99e Initial load duke parents: diff changeset	346 print_initial_summary_data(ParallelCompactData& summary_data,
a61af66fc99e Initial load duke parents: diff changeset	347 SpaceInfo* space_info) {
6725 da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	348 unsigned int id = PSParallelCompact::old_space_id;
0 a61af66fc99e Initial load duke parents: diff changeset	349 const MutableSpace* space;
a61af66fc99e Initial load duke parents: diff changeset	350 do {
a61af66fc99e Initial load duke parents: diff changeset	351 space = space_info[id].space();
a61af66fc99e Initial load duke parents: diff changeset	352 print_initial_summary_data(summary_data, space);
a61af66fc99e Initial load duke parents: diff changeset	353 } while (++id < PSParallelCompact::eden_space_id);
a61af66fc99e Initial load duke parents: diff changeset	354
a61af66fc99e Initial load duke parents: diff changeset	355 do {
a61af66fc99e Initial load duke parents: diff changeset	356 space = space_info[id].space();
a61af66fc99e Initial load duke parents: diff changeset	357 print_generic_summary_data(summary_data, space->bottom(), space->top());
a61af66fc99e Initial load duke parents: diff changeset	358 } while (++id < PSParallelCompact::last_space_id);
a61af66fc99e Initial load duke parents: diff changeset	359 }
a61af66fc99e Initial load duke parents: diff changeset	360 #endif // #ifndef PRODUCT
a61af66fc99e Initial load duke parents: diff changeset	361
a61af66fc99e Initial load duke parents: diff changeset	362 #ifdef ASSERT
a61af66fc99e Initial load duke parents: diff changeset	363 size_t add_obj_count;
a61af66fc99e Initial load duke parents: diff changeset	364 size_t add_obj_size;
a61af66fc99e Initial load duke parents: diff changeset	365 size_t mark_bitmap_count;
a61af66fc99e Initial load duke parents: diff changeset	366 size_t mark_bitmap_size;
a61af66fc99e Initial load duke parents: diff changeset	367 #endif // #ifdef ASSERT
a61af66fc99e Initial load duke parents: diff changeset	368
a61af66fc99e Initial load duke parents: diff changeset	369 ParallelCompactData::ParallelCompactData()
a61af66fc99e Initial load duke parents: diff changeset	370 {
a61af66fc99e Initial load duke parents: diff changeset	371 _region_start = 0;
a61af66fc99e Initial load duke parents: diff changeset	372
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	373 _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	374 _reserved_byte_size = 0;
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	375 _region_data = 0;
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	376 _region_count = 0;
10369 5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	377
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	378 _block_vspace = 0;
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	379 _block_data = 0;
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	380 _block_count = 0;
0 a61af66fc99e Initial load duke parents: diff changeset	381 }
a61af66fc99e Initial load duke parents: diff changeset	382
a61af66fc99e Initial load duke parents: diff changeset	383 bool ParallelCompactData::initialize(MemRegion covered_region)
a61af66fc99e Initial load duke parents: diff changeset	384 {
a61af66fc99e Initial load duke parents: diff changeset	385 _region_start = covered_region.start();
a61af66fc99e Initial load duke parents: diff changeset	386 const size_t region_size = covered_region.word_size();
a61af66fc99e Initial load duke parents: diff changeset	387 DEBUG_ONLY(_region_end = _region_start + region_size;)
a61af66fc99e Initial load duke parents: diff changeset	388
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	389 assert(region_align_down(_region_start) == _region_start,
0 a61af66fc99e Initial load duke parents: diff changeset	390 "region start not aligned");
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	391 assert((region_size & RegionSizeOffsetMask) == 0,
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	392 "region size not a multiple of RegionSize");
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	393
10369 5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	394 bool result = initialize_region_data(region_size) && initialize_block_data();
0 a61af66fc99e Initial load duke parents: diff changeset	395 return result;
a61af66fc99e Initial load duke parents: diff changeset	396 }
a61af66fc99e Initial load duke parents: diff changeset	397
a61af66fc99e Initial load duke parents: diff changeset	398 PSVirtualSpace*
a61af66fc99e Initial load duke parents: diff changeset	399 ParallelCompactData::create_vspace(size_t count, size_t element_size)
a61af66fc99e Initial load duke parents: diff changeset	400 {
a61af66fc99e Initial load duke parents: diff changeset	401 const size_t raw_bytes = count * element_size;
a61af66fc99e Initial load duke parents: diff changeset	402 const size_t page_sz = os::page_size_for_region(raw_bytes, raw_bytes, 10);
a61af66fc99e Initial load duke parents: diff changeset	403 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	404 _reserved_byte_size = align_size_up(raw_bytes, MAX2(page_sz, granularity));
0 a61af66fc99e Initial load duke parents: diff changeset	405
a61af66fc99e Initial load duke parents: diff changeset	406 const size_t rs_align = page_sz == (size_t) os::vm_page_size() ? 0 :
a61af66fc99e Initial load duke parents: diff changeset	407 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	408 ReservedSpace rs(_reserved_byte_size, rs_align, rs_align > 0);
0 a61af66fc99e Initial load duke parents: diff changeset	409 os::trace_page_sizes("par compact", raw_bytes, raw_bytes, page_sz, rs.base(),
a61af66fc99e Initial load duke parents: diff changeset	410 rs.size());
6197 d2a62e0f25eb 6995781: Native Memory Tracking (Phase 1) zgu parents: 6064 diff changeset	411
d2a62e0f25eb 6995781: Native Memory Tracking (Phase 1) zgu parents: 6064 diff changeset	412 MemTracker::record_virtual_memory_type((address)rs.base(), mtGC);
d2a62e0f25eb 6995781: Native Memory Tracking (Phase 1) zgu parents: 6064 diff changeset	413
0 a61af66fc99e Initial load duke parents: diff changeset	414 PSVirtualSpace* vspace = new PSVirtualSpace(rs, page_sz);
a61af66fc99e Initial load duke parents: diff changeset	415 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	416 if (vspace->expand_by(_reserved_byte_size)) {
0 a61af66fc99e Initial load duke parents: diff changeset	417 return vspace;
a61af66fc99e Initial load duke parents: diff changeset	418 }
a61af66fc99e Initial load duke parents: diff changeset	419 delete vspace;
237 1fdb98a17101 6716785: implicit null checks not triggering with CompressedOops coleenp parents: 235 diff changeset	420 // Release memory reserved in the space.
1fdb98a17101 6716785: implicit null checks not triggering with CompressedOops coleenp parents: 235 diff changeset	421 rs.release();
0 a61af66fc99e Initial load duke parents: diff changeset	422 }
a61af66fc99e Initial load duke parents: diff changeset	423
a61af66fc99e Initial load duke parents: diff changeset	424 return 0;
a61af66fc99e Initial load duke parents: diff changeset	425 }
a61af66fc99e Initial load duke parents: diff changeset	426
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	427 bool ParallelCompactData::initialize_region_data(size_t region_size)
0 a61af66fc99e Initial load duke parents: diff changeset	428 {
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	429 const size_t count = (region_size + RegionSizeOffsetMask) >> Log2RegionSize;
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	430 _region_vspace = create_vspace(count, sizeof(RegionData));
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	431 if (_region_vspace != 0) {
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	432 _region_data = (RegionData*)_region_vspace->reserved_low_addr();
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	433 _region_count = count;
0 a61af66fc99e Initial load duke parents: diff changeset	434 return true;
a61af66fc99e Initial load duke parents: diff changeset	435 }
a61af66fc99e Initial load duke parents: diff changeset	436 return false;
a61af66fc99e Initial load duke parents: diff changeset	437 }
a61af66fc99e Initial load duke parents: diff changeset	438
10369 5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	439 bool ParallelCompactData::initialize_block_data()
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	440 {
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	441 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	442 const size_t count = _region_count << Log2BlocksPerRegion;
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	443 _block_vspace = create_vspace(count, sizeof(BlockData));
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	444 if (_block_vspace != 0) {
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	445 _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	446 _block_count = count;
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	447 return true;
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	448 }
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	449 return false;
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	450 }
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	451
0 a61af66fc99e Initial load duke parents: diff changeset	452 void ParallelCompactData::clear()
a61af66fc99e Initial load duke parents: diff changeset	453 {
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	454 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	455 memset(_block_data, 0, _block_vspace->committed_size());
0 a61af66fc99e Initial load duke parents: diff changeset	456 }
a61af66fc99e Initial load duke parents: diff changeset	457
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	458 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	459 assert(beg_region <= _region_count, "beg_region out of range");
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	460 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	461 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	462
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	463 const size_t region_cnt = end_region - beg_region;
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	464 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	465
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	466 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	467 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	468 memset(_block_data + beg_block, 0, block_cnt * sizeof(BlockData));
0 a61af66fc99e Initial load duke parents: diff changeset	469 }
a61af66fc99e Initial load duke parents: diff changeset	470
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	471 HeapWord* ParallelCompactData::partial_obj_end(size_t region_idx) const
0 a61af66fc99e Initial load duke parents: diff changeset	472 {
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	473 const RegionData* cur_cp = region(region_idx);
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	474 const RegionData* const end_cp = region(region_count() - 1);
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	475
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	476 HeapWord* result = region_to_addr(region_idx);
0 a61af66fc99e Initial load duke parents: diff changeset	477 if (cur_cp < end_cp) {
a61af66fc99e Initial load duke parents: diff changeset	478 do {
a61af66fc99e Initial load duke parents: diff changeset	479 result += cur_cp->partial_obj_size();
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	480 } while (cur_cp->partial_obj_size() == RegionSize && ++cur_cp < end_cp);
0 a61af66fc99e Initial load duke parents: diff changeset	481 }
a61af66fc99e Initial load duke parents: diff changeset	482 return result;
a61af66fc99e Initial load duke parents: diff changeset	483 }
a61af66fc99e Initial load duke parents: diff changeset	484
a61af66fc99e Initial load duke parents: diff changeset	485 void ParallelCompactData::add_obj(HeapWord* addr, size_t len)
a61af66fc99e Initial load duke parents: diff changeset	486 {
a61af66fc99e Initial load duke parents: diff changeset	487 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	488 const size_t beg_region = obj_ofs >> Log2RegionSize;
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	489 const size_t end_region = (obj_ofs + len - 1) >> Log2RegionSize;
0 a61af66fc99e Initial load duke parents: diff changeset	490
a61af66fc99e Initial load duke parents: diff changeset	491 DEBUG_ONLY(Atomic::inc_ptr(&add_obj_count);)
a61af66fc99e Initial load duke parents: diff changeset	492 DEBUG_ONLY(Atomic::add_ptr(len, &add_obj_size);)
a61af66fc99e Initial load duke parents: diff changeset	493
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	494 if (beg_region == end_region) {
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	495 // All in one region.
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	496 _region_data[beg_region].add_live_obj(len);
0 a61af66fc99e Initial load duke parents: diff changeset	497 return;
a61af66fc99e Initial load duke parents: diff changeset	498 }
a61af66fc99e Initial load duke parents: diff changeset	499
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	500 // First region.
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	501 const size_t beg_ofs = region_offset(addr);
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	502 _region_data[beg_region].add_live_obj(RegionSize - beg_ofs);
0 a61af66fc99e Initial load duke parents: diff changeset	503
6725 da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	504 Klass* klass = ((oop)addr)->klass();
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	505 // Middle regions--completely spanned by this object.
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	506 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	507 _region_data[region].set_partial_obj_size(RegionSize);
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	508 _region_data[region].set_partial_obj_addr(addr);
0 a61af66fc99e Initial load duke parents: diff changeset	509 }
a61af66fc99e Initial load duke parents: diff changeset	510
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	511 // Last region.
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	512 const size_t end_ofs = region_offset(addr + len - 1);
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	513 _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	514 _region_data[end_region].set_partial_obj_addr(addr);
0 a61af66fc99e Initial load duke parents: diff changeset	515 }
a61af66fc99e Initial load duke parents: diff changeset	516
a61af66fc99e Initial load duke parents: diff changeset	517 void
a61af66fc99e Initial load duke parents: diff changeset	518 ParallelCompactData::summarize_dense_prefix(HeapWord* beg, HeapWord* end)
a61af66fc99e Initial load duke parents: diff changeset	519 {
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	520 assert(region_offset(beg) == 0, "not RegionSize aligned");
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	521 assert(region_offset(end) == 0, "not RegionSize aligned");
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	522
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	523 size_t cur_region = addr_to_region_idx(beg);
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	524 const size_t end_region = addr_to_region_idx(end);
0 a61af66fc99e Initial load duke parents: diff changeset	525 HeapWord* addr = beg;
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	526 while (cur_region < end_region) {
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	527 _region_data[cur_region].set_destination(addr);
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	528 _region_data[cur_region].set_destination_count(0);
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	529 _region_data[cur_region].set_source_region(cur_region);
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	530 _region_data[cur_region].set_data_location(addr);
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	531
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	532 // Update live_obj_size so the region appears completely full.
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	533 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	534 _region_data[cur_region].set_live_obj_size(live_size);
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	535
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	536 ++cur_region;
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	537 addr += RegionSize;
0 a61af66fc99e Initial load duke parents: diff changeset	538 }
a61af66fc99e Initial load duke parents: diff changeset	539 }
a61af66fc99e Initial load duke parents: diff changeset	540
482 7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	541 // 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	542 // split point.
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	543 //
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	544 // 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	545 // 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	546 // region (an "easy" split, no extra bookkeeping required).
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	547 //
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	548 // 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	549 // 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	550 // 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	551 // 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	552 // 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	553 // 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	554 // 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	555 // 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	556 // split).
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	557 HeapWord*
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	558 ParallelCompactData::summarize_split_space(size_t src_region,
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	559 SplitInfo& split_info,
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	560 HeapWord* destination,
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	561 HeapWord* target_end,
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	562 HeapWord** target_next)
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	563 {
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	564 assert(destination <= target_end, "sanity");
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	565 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	566 "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	567 assert(is_region_aligned(target_end), "sanity");
482 7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	568
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	569 size_t split_region = src_region;
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	570 HeapWord* split_destination = destination;
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	571 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	572
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	573 if (destination + partial_obj_size > target_end) {
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	574 // 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	575 // 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	576 // destination space.
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	577 //
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	578 // 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	579 // region containing it.
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	580 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	581 split_region = addr_to_region_idx(overflow_obj);
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	582
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	583 // 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	584 // 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	585 // implies a region must be filled).
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	586 //
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	587 // 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	588 // 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	589 // 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	590 // object as opposed to just one field.)
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 // 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	593 // 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	594 //
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	595 // max(top, max(new_top, clear_top))
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	596 //
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	597 // 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	598 // to target_end.
482 7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	599 const RegionData* const sr = region(split_region);
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	600 const size_t beg_idx =
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	601 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	602 sr->partial_obj_size()));
696 f18338cf04b0 6810474: par compact - crash in summary_phase with very full heap jcoomes parents: 628 diff changeset	603 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	604
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	605 if (TraceParallelOldGCSummaryPhase) {
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	606 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	607 SIZE_FORMAT ", " SIZE_FORMAT ")",
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	608 beg_idx, end_idx);
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 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	611 _region_data[idx].set_source_region(0);
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	612 }
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	613
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	614 // 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	615 split_destination = sr->destination();
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	616 partial_obj_size = sr->partial_obj_size();
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	617 }
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	618
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	619 // 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	620 if (partial_obj_size != 0) {
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	621 _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	622 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	623 }
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	624
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	625 // Setup the continuation addresses.
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	626 *target_next = split_destination + partial_obj_size;
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	627 HeapWord* const source_next = region_to_addr(split_region) + partial_obj_size;
0 a61af66fc99e Initial load duke parents: diff changeset	628
a61af66fc99e Initial load duke parents: diff changeset	629 if (TraceParallelOldGCSummaryPhase) {
482 7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	630 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	631 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	632 " pos=" SIZE_FORMAT,
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	633 split_type, source_next, split_region,
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	634 partial_obj_size);
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	635 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	636 " tn=" PTR_FORMAT,
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	637 split_type, split_destination,
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	638 addr_to_region_idx(split_destination),
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	639 *target_next);
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	640
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	641 if (partial_obj_size != 0) {
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	642 HeapWord* const po_beg = split_info.destination();
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	643 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	644 gclog_or_tty->print_cr("%s split: "
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	645 "po_beg=" PTR_FORMAT " " SIZE_FORMAT " "
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	646 "po_end=" PTR_FORMAT " " SIZE_FORMAT,
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	647 split_type,
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	648 po_beg, addr_to_region_idx(po_beg),
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	649 po_end, addr_to_region_idx(po_end));
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	650 }
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 return source_next;
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	654 }
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	655
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	656 bool ParallelCompactData::summarize(SplitInfo& split_info,
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	657 HeapWord* source_beg, HeapWord* source_end,
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	658 HeapWord** source_next,
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	659 HeapWord* target_beg, HeapWord* target_end,
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	660 HeapWord** target_next)
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	661 {
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	662 if (TraceParallelOldGCSummaryPhase) {
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	663 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	664 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	665 "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	666 source_beg, source_end, source_next_val,
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	667 target_beg, target_end, *target_next);
0 a61af66fc99e Initial load duke parents: diff changeset	668 }
a61af66fc99e Initial load duke parents: diff changeset	669
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	670 size_t cur_region = addr_to_region_idx(source_beg);
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	671 const size_t end_region = addr_to_region_idx(region_align_up(source_end));
0 a61af66fc99e Initial load duke parents: diff changeset	672
a61af66fc99e Initial load duke parents: diff changeset	673 HeapWord *dest_addr = target_beg;
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	674 while (cur_region < end_region) {
482 7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	675 // 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	676 _region_data[cur_region].set_destination(dest_addr);
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	677
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	678 size_t words = _region_data[cur_region].data_size();
0 a61af66fc99e Initial load duke parents: diff changeset	679 if (words > 0) {
482 7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	680 // 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	681 // 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	682 // target space and the rest is copied elsewhere.
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	683 if (dest_addr + words > target_end) {
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	684 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	685 *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	686 target_end, target_next);
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	687 return false;
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	688 }
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	689
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	690 // 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	691 // 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	692 // 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	693 // destination region.
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	694 //
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	695 // 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	696 // 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	697 // 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	698 // available and can be claimed and then filled.
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	699 uint destination_count = 0;
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	700 if (split_info.is_split(cur_region)) {
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	701 // 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	702 // 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	703 // 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	704 // 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	705 // cross a destination region boundary.
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	706 destination_count = split_info.destination_count();
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	707 if (destination_count == 2) {
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	708 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	709 _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	710 }
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	711 }
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	712
0 a61af66fc99e Initial load duke parents: diff changeset	713 HeapWord* const last_addr = dest_addr + words - 1;
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	714 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	715 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	716
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	717 // Initially assume that the destination regions will be the same and
0 a61af66fc99e Initial load duke parents: diff changeset	718 // 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	719 // 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	720 // completely into itself.
482 7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	721 destination_count += cur_region == dest_region_2 ? 0 : 1;
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	722 if (dest_region_1 != dest_region_2) {
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	723 // Destination regions differ; adjust destination_count.
0 a61af66fc99e Initial load duke parents: diff changeset	724 destination_count += 1;
375 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 dest_region_2.
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	726 _region_data[dest_region_2].set_source_region(cur_region);
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	727 } else if (region_offset(dest_addr) == 0) {
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	728 // 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	729 // region.
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	730 _region_data[dest_region_1].set_source_region(cur_region);
0 a61af66fc99e Initial load duke parents: diff changeset	731 }
a61af66fc99e Initial load duke parents: diff changeset	732
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	733 _region_data[cur_region].set_destination_count(destination_count);
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	734 _region_data[cur_region].set_data_location(region_to_addr(cur_region));
0 a61af66fc99e Initial load duke parents: diff changeset	735 dest_addr += words;
a61af66fc99e Initial load duke parents: diff changeset	736 }
a61af66fc99e Initial load duke parents: diff changeset	737
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	738 ++cur_region;
0 a61af66fc99e Initial load duke parents: diff changeset	739 }
a61af66fc99e Initial load duke parents: diff changeset	740
a61af66fc99e Initial load duke parents: diff changeset	741 *target_next = dest_addr;
a61af66fc99e Initial load duke parents: diff changeset	742 return true;
a61af66fc99e Initial load duke parents: diff changeset	743 }
a61af66fc99e Initial load duke parents: diff changeset	744
a61af66fc99e Initial load duke parents: diff changeset	745 HeapWord* ParallelCompactData::calc_new_pointer(HeapWord* addr) {
a61af66fc99e Initial load duke parents: diff changeset	746 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	747 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	748 assert(PSParallelCompact::mark_bitmap()->is_marked(addr), "not marked");
0 a61af66fc99e Initial load duke parents: diff changeset	749
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	750 // Region covering the object.
10369 5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	751 RegionData* const region_ptr = addr_to_region_ptr(addr);
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	752 HeapWord* result = region_ptr->destination();
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	753
10369 5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	754 // 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	755 // 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	756
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	757 // 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	758 // 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	759 // 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	760 // ever implemented, this should be revisited.
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	761 if (region_ptr->data_size() == RegionSize) {
10369 5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	762 result += region_offset(addr);
0 a61af66fc99e Initial load duke parents: diff changeset	763 return result;
a61af66fc99e Initial load duke parents: diff changeset	764 }
a61af66fc99e Initial load duke parents: diff changeset	765
10369 5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	766 // 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	767 // 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	768 // 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	769
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	770 // 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	771 // 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	772 // idempotent).
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	773 if (!region_ptr->blocks_filled()) {
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	774 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	775 region_ptr->set_blocks_filled();
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	776 }
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	777
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	778 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	779 const size_t block_offset = addr_to_block_ptr(addr)->offset();
0 a61af66fc99e Initial load duke parents: diff changeset	780
a61af66fc99e Initial load duke parents: diff changeset	781 const ParMarkBitMap* bitmap = PSParallelCompact::mark_bitmap();
10369 5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	782 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	783 result += block_offset + live;
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	784 DEBUG_ONLY(PSParallelCompact::check_new_location(addr, result));
0 a61af66fc99e Initial load duke parents: diff changeset	785 return result;
a61af66fc99e Initial load duke parents: diff changeset	786 }
a61af66fc99e Initial load duke parents: diff changeset	787
10369 5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	788 #ifdef ASSERT
0 a61af66fc99e Initial load duke parents: diff changeset	789 void ParallelCompactData::verify_clear(const PSVirtualSpace* vspace)
a61af66fc99e Initial load duke parents: diff changeset	790 {
a61af66fc99e Initial load duke parents: diff changeset	791 const size_t* const beg = (const size_t*)vspace->committed_low_addr();
a61af66fc99e Initial load duke parents: diff changeset	792 const size_t* const end = (const size_t*)vspace->committed_high_addr();
a61af66fc99e Initial load duke parents: diff changeset	793 for (const size_t* p = beg; p < end; ++p) {
a61af66fc99e Initial load duke parents: diff changeset	794 assert(*p == 0, "not zero");
a61af66fc99e Initial load duke parents: diff changeset	795 }
a61af66fc99e Initial load duke parents: diff changeset	796 }
a61af66fc99e Initial load duke parents: diff changeset	797
a61af66fc99e Initial load duke parents: diff changeset	798 void ParallelCompactData::verify_clear()
a61af66fc99e Initial load duke parents: diff changeset	799 {
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	800 verify_clear(_region_vspace);
10369 5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	801 verify_clear(_block_vspace);
0 a61af66fc99e Initial load duke parents: diff changeset	802 }
a61af66fc99e Initial load duke parents: diff changeset	803 #endif // #ifdef ASSERT
a61af66fc99e Initial load duke parents: diff changeset	804
10405 f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10369 diff changeset	805 STWGCTimer PSParallelCompact::_gc_timer;
f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10369 diff changeset	806 ParallelOldTracer PSParallelCompact::_gc_tracer;
0 a61af66fc99e Initial load duke parents: diff changeset	807 elapsedTimer PSParallelCompact::_accumulated_time;
a61af66fc99e Initial load duke parents: diff changeset	808 unsigned int PSParallelCompact::_total_invocations = 0;
a61af66fc99e Initial load duke parents: diff changeset	809 unsigned int PSParallelCompact::_maximum_compaction_gc_num = 0;
a61af66fc99e Initial load duke parents: diff changeset	810 jlong PSParallelCompact::_time_of_last_gc = 0;
a61af66fc99e Initial load duke parents: diff changeset	811 CollectorCounters* PSParallelCompact::_counters = NULL;
a61af66fc99e Initial load duke parents: diff changeset	812 ParMarkBitMap PSParallelCompact::_mark_bitmap;
a61af66fc99e Initial load duke parents: diff changeset	813 ParallelCompactData PSParallelCompact::_summary_data;
a61af66fc99e Initial load duke parents: diff changeset	814
a61af66fc99e Initial load duke parents: diff changeset	815 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	816
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 79 diff changeset	817 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	818
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 79 diff changeset	819 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	820 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	821
10179 a08c80e9e1e5 8012687: Remove unused is_root checks and closures stefank parents: 9076 diff changeset	822 PSParallelCompact::AdjustPointerClosure PSParallelCompact::_adjust_pointer_closure;
6725 da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	823 PSParallelCompact::AdjustKlassClosure PSParallelCompact::_adjust_klass_closure;
0 a61af66fc99e Initial load duke parents: diff changeset	824
10179 a08c80e9e1e5 8012687: Remove unused is_root checks and closures stefank parents: 9076 diff changeset	825 void PSParallelCompact::AdjustPointerClosure::do_oop(oop* p) { adjust_pointer(p); }
a08c80e9e1e5 8012687: Remove unused is_root checks and closures stefank parents: 9076 diff changeset	826 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	827
1311 2a1472c30599 4396719: Mark Sweep stack overflow on deeply nested Object arrays jcoomes parents: 997 diff changeset	828 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	829
6725 da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	830 void PSParallelCompact::MarkAndPushClosure::do_oop(oop* p) {
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	831 mark_and_push(_compaction_manager, p);
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	832 }
113 ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 79 diff changeset	833 void PSParallelCompact::MarkAndPushClosure::do_oop(narrowOop* p) { mark_and_push(_compaction_manager, p); }
0 a61af66fc99e Initial load duke parents: diff changeset	834
6725 da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	835 void PSParallelCompact::FollowKlassClosure::do_klass(Klass* klass) {
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	836 klass->oops_do(_mark_and_push_closure);
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	837 }
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	838 void PSParallelCompact::AdjustKlassClosure::do_klass(Klass* klass) {
10179 a08c80e9e1e5 8012687: Remove unused is_root checks and closures stefank parents: 9076 diff changeset	839 klass->oops_do(&PSParallelCompact::_adjust_pointer_closure);
6725 da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	840 }
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	841
0 a61af66fc99e Initial load duke parents: diff changeset	842 void PSParallelCompact::post_initialize() {
a61af66fc99e Initial load duke parents: diff changeset	843 ParallelScavengeHeap* heap = gc_heap();
a61af66fc99e Initial load duke parents: diff changeset	844 assert(heap->kind() == CollectedHeap::ParallelScavengeHeap, "Sanity");
a61af66fc99e Initial load duke parents: diff changeset	845
a61af66fc99e Initial load duke parents: diff changeset	846 MemRegion mr = heap->reserved_region();
2369 92da084fefc9 6668573: CMS: reference processing crash if ParallelCMSThreads > ParallelGCThreads ysr parents: 2177 diff changeset	847 _ref_processor =
92da084fefc9 6668573: CMS: reference processing crash if ParallelCMSThreads > ParallelGCThreads ysr parents: 2177 diff changeset	848 new ReferenceProcessor(mr, // span
92da084fefc9 6668573: CMS: reference processing crash if ParallelCMSThreads > ParallelGCThreads ysr parents: 2177 diff changeset	849 ParallelRefProcEnabled && (ParallelGCThreads > 1), // mt processing
92da084fefc9 6668573: CMS: reference processing crash if ParallelCMSThreads > ParallelGCThreads ysr parents: 2177 diff changeset	850 (int) ParallelGCThreads, // mt processing degree
92da084fefc9 6668573: CMS: reference processing crash if ParallelCMSThreads > ParallelGCThreads ysr parents: 2177 diff changeset	851 true, // mt discovery
92da084fefc9 6668573: CMS: reference processing crash if ParallelCMSThreads > ParallelGCThreads ysr parents: 2177 diff changeset	852 (int) ParallelGCThreads, // mt discovery degree
92da084fefc9 6668573: CMS: reference processing crash if ParallelCMSThreads > ParallelGCThreads ysr parents: 2177 diff changeset	853 true, // atomic_discovery
92da084fefc9 6668573: CMS: reference processing crash if ParallelCMSThreads > ParallelGCThreads ysr parents: 2177 diff changeset	854 &_is_alive_closure, // non-header is alive closure
92da084fefc9 6668573: CMS: reference processing crash if ParallelCMSThreads > ParallelGCThreads ysr parents: 2177 diff changeset	855 false); // write barrier for next field updates
0 a61af66fc99e Initial load duke parents: diff changeset	856 _counters = new CollectorCounters("PSParallelCompact", 1);
a61af66fc99e Initial load duke parents: diff changeset	857
a61af66fc99e Initial load duke parents: diff changeset	858 // Initialize static fields in ParCompactionManager.
a61af66fc99e Initial load duke parents: diff changeset	859 ParCompactionManager::initialize(mark_bitmap());
a61af66fc99e Initial load duke parents: diff changeset	860 }
a61af66fc99e Initial load duke parents: diff changeset	861
a61af66fc99e Initial load duke parents: diff changeset	862 bool PSParallelCompact::initialize() {
a61af66fc99e Initial load duke parents: diff changeset	863 ParallelScavengeHeap* heap = gc_heap();
a61af66fc99e Initial load duke parents: diff changeset	864 assert(heap->kind() == CollectedHeap::ParallelScavengeHeap, "Sanity");
a61af66fc99e Initial load duke parents: diff changeset	865 MemRegion mr = heap->reserved_region();
a61af66fc99e Initial load duke parents: diff changeset	866
a61af66fc99e Initial load duke parents: diff changeset	867 // Was the old gen get allocated successfully?
a61af66fc99e Initial load duke parents: diff changeset	868 if (!heap->old_gen()->is_allocated()) {
a61af66fc99e Initial load duke parents: diff changeset	869 return false;
a61af66fc99e Initial load duke parents: diff changeset	870 }
a61af66fc99e Initial load duke parents: diff changeset	871
a61af66fc99e Initial load duke parents: diff changeset	872 initialize_space_info();
a61af66fc99e Initial load duke parents: diff changeset	873 initialize_dead_wood_limiter();
a61af66fc99e Initial load duke parents: diff changeset	874
a61af66fc99e Initial load duke parents: diff changeset	875 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	876 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	877 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	878 "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	879 _mark_bitmap.reserved_byte_size()/K, mr.byte_size()/K));
0 a61af66fc99e Initial load duke parents: diff changeset	880 return false;
a61af66fc99e Initial load duke parents: diff changeset	881 }
a61af66fc99e Initial load duke parents: diff changeset	882
a61af66fc99e Initial load duke parents: diff changeset	883 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	884 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	885 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	886 "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	887 _summary_data.reserved_byte_size()/K, mr.byte_size()/K));
0 a61af66fc99e Initial load duke parents: diff changeset	888 return false;
a61af66fc99e Initial load duke parents: diff changeset	889 }
a61af66fc99e Initial load duke parents: diff changeset	890
a61af66fc99e Initial load duke parents: diff changeset	891 return true;
a61af66fc99e Initial load duke parents: diff changeset	892 }
a61af66fc99e Initial load duke parents: diff changeset	893
a61af66fc99e Initial load duke parents: diff changeset	894 void PSParallelCompact::initialize_space_info()
a61af66fc99e Initial load duke parents: diff changeset	895 {
a61af66fc99e Initial load duke parents: diff changeset	896 memset(&_space_info, 0, sizeof(_space_info));
a61af66fc99e Initial load duke parents: diff changeset	897
a61af66fc99e Initial load duke parents: diff changeset	898 ParallelScavengeHeap* heap = gc_heap();
a61af66fc99e Initial load duke parents: diff changeset	899 PSYoungGen* young_gen = heap->young_gen();
6725 da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	900
0 a61af66fc99e Initial load duke parents: diff changeset	901 _space_info[old_space_id].set_space(heap->old_gen()->object_space());
a61af66fc99e Initial load duke parents: diff changeset	902 _space_info[eden_space_id].set_space(young_gen->eden_space());
a61af66fc99e Initial load duke parents: diff changeset	903 _space_info[from_space_id].set_space(young_gen->from_space());
a61af66fc99e Initial load duke parents: diff changeset	904 _space_info[to_space_id].set_space(young_gen->to_space());
a61af66fc99e Initial load duke parents: diff changeset	905
a61af66fc99e Initial load duke parents: diff changeset	906 _space_info[old_space_id].set_start_array(heap->old_gen()->start_array());
a61af66fc99e Initial load duke parents: diff changeset	907 }
a61af66fc99e Initial load duke parents: diff changeset	908
a61af66fc99e Initial load duke parents: diff changeset	909 void PSParallelCompact::initialize_dead_wood_limiter()
a61af66fc99e Initial load duke parents: diff changeset	910 {
a61af66fc99e Initial load duke parents: diff changeset	911 const size_t max = 100;
a61af66fc99e Initial load duke parents: diff changeset	912 _dwl_mean = double(MIN2(ParallelOldDeadWoodLimiterMean, max)) / 100.0;
a61af66fc99e Initial load duke parents: diff changeset	913 _dwl_std_dev = double(MIN2(ParallelOldDeadWoodLimiterStdDev, max)) / 100.0;
a61af66fc99e Initial load duke parents: diff changeset	914 _dwl_first_term = 1.0 / (sqrt(2.0 * M_PI) * _dwl_std_dev);
a61af66fc99e Initial load duke parents: diff changeset	915 DEBUG_ONLY(_dwl_initialized = true;)
a61af66fc99e Initial load duke parents: diff changeset	916 _dwl_adjustment = normal_distribution(1.0);
a61af66fc99e Initial load duke parents: diff changeset	917 }
a61af66fc99e Initial load duke parents: diff changeset	918
a61af66fc99e Initial load duke parents: diff changeset	919 // Simple class for storing info about the heap at the start of GC, to be used
a61af66fc99e Initial load duke parents: diff changeset	920 // after GC for comparison/printing.
a61af66fc99e Initial load duke parents: diff changeset	921 class PreGCValues {
a61af66fc99e Initial load duke parents: diff changeset	922 public:
a61af66fc99e Initial load duke parents: diff changeset	923 PreGCValues() { }
a61af66fc99e Initial load duke parents: diff changeset	924 PreGCValues(ParallelScavengeHeap* heap) { fill(heap); }
a61af66fc99e Initial load duke parents: diff changeset	925
a61af66fc99e Initial load duke parents: diff changeset	926 void fill(ParallelScavengeHeap* heap) {
a61af66fc99e Initial load duke parents: diff changeset	927 _heap_used = heap->used();
a61af66fc99e Initial load duke parents: diff changeset	928 _young_gen_used = heap->young_gen()->used_in_bytes();
a61af66fc99e Initial load duke parents: diff changeset	929 _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	930 _metadata_used = MetaspaceAux::allocated_used_bytes();
0 a61af66fc99e Initial load duke parents: diff changeset	931 };
a61af66fc99e Initial load duke parents: diff changeset	932
a61af66fc99e Initial load duke parents: diff changeset	933 size_t heap_used() const { return _heap_used; }
a61af66fc99e Initial load duke parents: diff changeset	934 size_t young_gen_used() const { return _young_gen_used; }
a61af66fc99e Initial load duke parents: diff changeset	935 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	936 size_t metadata_used() const { return _metadata_used; }
0 a61af66fc99e Initial load duke parents: diff changeset	937
a61af66fc99e Initial load duke parents: diff changeset	938 private:
a61af66fc99e Initial load duke parents: diff changeset	939 size_t _heap_used;
a61af66fc99e Initial load duke parents: diff changeset	940 size_t _young_gen_used;
a61af66fc99e Initial load duke parents: diff changeset	941 size_t _old_gen_used;
6725 da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	942 size_t _metadata_used;
0 a61af66fc99e Initial load duke parents: diff changeset	943 };
a61af66fc99e Initial load duke parents: diff changeset	944
a61af66fc99e Initial load duke parents: diff changeset	945 void
a61af66fc99e Initial load duke parents: diff changeset	946 PSParallelCompact::clear_data_covering_space(SpaceId id)
a61af66fc99e Initial load duke parents: diff changeset	947 {
a61af66fc99e Initial load duke parents: diff changeset	948 // At this point, top is the value before GC, new_top() is the value that will
a61af66fc99e Initial load duke parents: diff changeset	949 // be set at the end of GC. The marking bitmap is cleared to top; nothing
a61af66fc99e Initial load duke parents: diff changeset	950 // should be marked above top. The summary data is cleared to the larger of
a61af66fc99e Initial load duke parents: diff changeset	951 // top & new_top.
a61af66fc99e Initial load duke parents: diff changeset	952 MutableSpace* const space = _space_info[id].space();
a61af66fc99e Initial load duke parents: diff changeset	953 HeapWord* const bot = space->bottom();
a61af66fc99e Initial load duke parents: diff changeset	954 HeapWord* const top = space->top();
a61af66fc99e Initial load duke parents: diff changeset	955 HeapWord* const max_top = MAX2(top, _space_info[id].new_top());
a61af66fc99e Initial load duke parents: diff changeset	956
a61af66fc99e Initial load duke parents: diff changeset	957 const idx_t beg_bit = _mark_bitmap.addr_to_bit(bot);
a61af66fc99e Initial load duke parents: diff changeset	958 const idx_t end_bit = BitMap::word_align_up(_mark_bitmap.addr_to_bit(top));
a61af66fc99e Initial load duke parents: diff changeset	959 _mark_bitmap.clear_range(beg_bit, end_bit);
a61af66fc99e Initial load duke parents: diff changeset	960
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	961 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	962 const size_t end_region =
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	963 _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	964 _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	965
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	966 // Clear the data used to 'split' regions.
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	967 SplitInfo& split_info = _space_info[id].split_info();
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	968 if (split_info.is_valid()) {
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	969 split_info.clear();
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	970 }
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	971 DEBUG_ONLY(split_info.verify_clear();)
0 a61af66fc99e Initial load duke parents: diff changeset	972 }
a61af66fc99e Initial load duke parents: diff changeset	973
a61af66fc99e Initial load duke parents: diff changeset	974 void PSParallelCompact::pre_compact(PreGCValues* pre_gc_values)
a61af66fc99e Initial load duke parents: diff changeset	975 {
a61af66fc99e Initial load duke parents: diff changeset	976 // Update the from & to space pointers in space_info, since they are swapped
a61af66fc99e Initial load duke parents: diff changeset	977 // at each young gen gc. Do the update unconditionally (even though a
a61af66fc99e Initial load duke parents: diff changeset	978 // promotion failure does not swap spaces) because an unknown number of minor
a61af66fc99e Initial load duke parents: diff changeset	979 // collections will have swapped the spaces an unknown number of times.
10405 f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10369 diff changeset	980 GCTraceTime tm("pre compact", print_phases(), true, &_gc_timer);
0 a61af66fc99e Initial load duke parents: diff changeset	981 ParallelScavengeHeap* heap = gc_heap();
a61af66fc99e Initial load duke parents: diff changeset	982 _space_info[from_space_id].set_space(heap->young_gen()->from_space());
a61af66fc99e Initial load duke parents: diff changeset	983 _space_info[to_space_id].set_space(heap->young_gen()->to_space());
a61af66fc99e Initial load duke parents: diff changeset	984
a61af66fc99e Initial load duke parents: diff changeset	985 pre_gc_values->fill(heap);
a61af66fc99e Initial load duke parents: diff changeset	986
a61af66fc99e Initial load duke parents: diff changeset	987 DEBUG_ONLY(add_obj_count = add_obj_size = 0;)
a61af66fc99e Initial load duke parents: diff changeset	988 DEBUG_ONLY(mark_bitmap_count = mark_bitmap_size = 0;)
a61af66fc99e Initial load duke parents: diff changeset	989
a61af66fc99e Initial load duke parents: diff changeset	990 // 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	991 heap->increment_total_collections(true);
0 a61af66fc99e Initial load duke parents: diff changeset	992
a61af66fc99e Initial load duke parents: diff changeset	993 // We need to track unique mark sweep invocations as well.
a61af66fc99e Initial load duke parents: diff changeset	994 _total_invocations++;
a61af66fc99e Initial load duke parents: diff changeset	995
4872 aa3d708d67c4 7141200: log some interesting information in ring buffers for crashes never parents: 4712 diff changeset	996 heap->print_heap_before_gc();
10405 f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10369 diff changeset	997 heap->trace_heap_before_gc(&_gc_tracer);
0 a61af66fc99e Initial load duke parents: diff changeset	998
a61af66fc99e Initial load duke parents: diff changeset	999 // Fill in TLABs
a61af66fc99e Initial load duke parents: diff changeset	1000 heap->accumulate_statistics_all_tlabs();
a61af66fc99e Initial load duke parents: diff changeset	1001 heap->ensure_parsability(true); // retire TLABs
a61af66fc99e Initial load duke parents: diff changeset	1002
a61af66fc99e Initial load duke parents: diff changeset	1003 if (VerifyBeforeGC && heap->total_collections() >= VerifyGCStartAt) {
a61af66fc99e Initial load duke parents: diff changeset	1004 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	1005 Universe::verify(" VerifyBeforeGC:");
0 a61af66fc99e Initial load duke parents: diff changeset	1006 }
a61af66fc99e Initial load duke parents: diff changeset	1007
a61af66fc99e Initial load duke parents: diff changeset	1008 // Verify object start arrays
a61af66fc99e Initial load duke parents: diff changeset	1009 if (VerifyObjectStartArray &&
a61af66fc99e Initial load duke parents: diff changeset	1010 VerifyBeforeGC) {
a61af66fc99e Initial load duke parents: diff changeset	1011 heap->old_gen()->verify_object_start_array();
a61af66fc99e Initial load duke parents: diff changeset	1012 }
a61af66fc99e Initial load duke parents: diff changeset	1013
a61af66fc99e Initial load duke parents: diff changeset	1014 DEBUG_ONLY(mark_bitmap()->verify_clear();)
a61af66fc99e Initial load duke parents: diff changeset	1015 DEBUG_ONLY(summary_data().verify_clear();)
210 05712c37c828 6676016: ParallelOldGC leaks memory jcoomes parents: 142 diff changeset	1016
05712c37c828 6676016: ParallelOldGC leaks memory jcoomes parents: 142 diff changeset	1017 // Have worker threads release resources the next time they run a task.
05712c37c828 6676016: ParallelOldGC leaks memory jcoomes parents: 142 diff changeset	1018 gc_task_manager()->release_all_resources();
0 a61af66fc99e Initial load duke parents: diff changeset	1019 }
a61af66fc99e Initial load duke parents: diff changeset	1020
a61af66fc99e Initial load duke parents: diff changeset	1021 void PSParallelCompact::post_compact()
a61af66fc99e Initial load duke parents: diff changeset	1022 {
10405 f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10369 diff changeset	1023 GCTraceTime tm("post compact", print_phases(), true, &_gc_timer);
0 a61af66fc99e Initial load duke parents: diff changeset	1024
6725 da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	1025 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	1026 // Clear the marking bitmap, summary data and split info.
0 a61af66fc99e Initial load duke parents: diff changeset	1027 clear_data_covering_space(SpaceId(id));
482 7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1028 // 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	1029 _space_info[id].publish_new_top();
0 a61af66fc99e Initial load duke parents: diff changeset	1030 }
a61af66fc99e Initial load duke parents: diff changeset	1031
a61af66fc99e Initial load duke parents: diff changeset	1032 MutableSpace* const eden_space = _space_info[eden_space_id].space();
a61af66fc99e Initial load duke parents: diff changeset	1033 MutableSpace* const from_space = _space_info[from_space_id].space();
a61af66fc99e Initial load duke parents: diff changeset	1034 MutableSpace* const to_space = _space_info[to_space_id].space();
a61af66fc99e Initial load duke parents: diff changeset	1035
a61af66fc99e Initial load duke parents: diff changeset	1036 ParallelScavengeHeap* heap = gc_heap();
a61af66fc99e Initial load duke parents: diff changeset	1037 bool eden_empty = eden_space->is_empty();
a61af66fc99e Initial load duke parents: diff changeset	1038 if (!eden_empty) {
a61af66fc99e Initial load duke parents: diff changeset	1039 eden_empty = absorb_live_data_from_eden(heap->size_policy(),
a61af66fc99e Initial load duke parents: diff changeset	1040 heap->young_gen(), heap->old_gen());
a61af66fc99e Initial load duke parents: diff changeset	1041 }
a61af66fc99e Initial load duke parents: diff changeset	1042
a61af66fc99e Initial load duke parents: diff changeset	1043 // Update heap occupancy information which is used as input to the soft ref
a61af66fc99e Initial load duke parents: diff changeset	1044 // clearing policy at the next gc.
a61af66fc99e Initial load duke parents: diff changeset	1045 Universe::update_heap_info_at_gc();
a61af66fc99e Initial load duke parents: diff changeset	1046
a61af66fc99e Initial load duke parents: diff changeset	1047 bool young_gen_empty = eden_empty && from_space->is_empty() &&
a61af66fc99e Initial load duke parents: diff changeset	1048 to_space->is_empty();
a61af66fc99e Initial load duke parents: diff changeset	1049
a61af66fc99e Initial load duke parents: diff changeset	1050 BarrierSet* bs = heap->barrier_set();
a61af66fc99e Initial load duke parents: diff changeset	1051 if (bs->is_a(BarrierSet::ModRef)) {
a61af66fc99e Initial load duke parents: diff changeset	1052 ModRefBarrierSet* modBS = (ModRefBarrierSet*)bs;
a61af66fc99e Initial load duke parents: diff changeset	1053 MemRegion old_mr = heap->old_gen()->reserved();
a61af66fc99e Initial load duke parents: diff changeset	1054
a61af66fc99e Initial load duke parents: diff changeset	1055 if (young_gen_empty) {
6725 da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	1056 modBS->clear(MemRegion(old_mr.start(), old_mr.end()));
0 a61af66fc99e Initial load duke parents: diff changeset	1057 } else {
6725 da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	1058 modBS->invalidate(MemRegion(old_mr.start(), old_mr.end()));
0 a61af66fc99e Initial load duke parents: diff changeset	1059 }
a61af66fc99e Initial load duke parents: diff changeset	1060 }
a61af66fc99e Initial load duke parents: diff changeset	1061
6725 da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	1062 // 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	1063 ClassLoaderDataGraph::purge();
10183 868d87ed63c8 8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions jmasa parents: 10179 diff changeset	1064 MetaspaceAux::verify_metrics();
6725 da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	1065
0 a61af66fc99e Initial load duke parents: diff changeset	1066 Threads::gc_epilogue();
a61af66fc99e Initial load duke parents: diff changeset	1067 CodeCache::gc_epilogue();
2147 9afee0b9fc1d 7012505: BreakpointWithFullGC.sh fails with Internal Error (src/share/vm/oops/methodOop.cpp:220) kamg parents: 1972 diff changeset	1068 JvmtiExport::gc_epilogue();
0 a61af66fc99e Initial load duke parents: diff changeset	1069
a61af66fc99e Initial load duke parents: diff changeset	1070 COMPILER2_PRESENT(DerivedPointerTable::update_pointers());
a61af66fc99e Initial load duke parents: diff changeset	1071
a61af66fc99e Initial load duke parents: diff changeset	1072 ref_processor()->enqueue_discovered_references(NULL);
a61af66fc99e Initial load duke parents: diff changeset	1073
263 12eea04c8b06 6672698: mangle_unused_area() should not remangle the entire heap at each collection. jmasa parents: 210 diff changeset	1074 if (ZapUnusedHeapArea) {
12eea04c8b06 6672698: mangle_unused_area() should not remangle the entire heap at each collection. jmasa parents: 210 diff changeset	1075 heap->gen_mangle_unused_area();
12eea04c8b06 6672698: mangle_unused_area() should not remangle the entire heap at each collection. jmasa parents: 210 diff changeset	1076 }
12eea04c8b06 6672698: mangle_unused_area() should not remangle the entire heap at each collection. jmasa parents: 210 diff changeset	1077
0 a61af66fc99e Initial load duke parents: diff changeset	1078 // Update time of last GC
a61af66fc99e Initial load duke parents: diff changeset	1079 reset_millis_since_last_gc();
a61af66fc99e Initial load duke parents: diff changeset	1080 }
a61af66fc99e Initial load duke parents: diff changeset	1081
a61af66fc99e Initial load duke parents: diff changeset	1082 HeapWord*
a61af66fc99e Initial load duke parents: diff changeset	1083 PSParallelCompact::compute_dense_prefix_via_density(const SpaceId id,
a61af66fc99e Initial load duke parents: diff changeset	1084 bool maximum_compaction)
a61af66fc99e Initial load duke parents: diff changeset	1085 {
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1086 const size_t region_size = ParallelCompactData::RegionSize;
0 a61af66fc99e Initial load duke parents: diff changeset	1087 const ParallelCompactData& sd = summary_data();
a61af66fc99e Initial load duke parents: diff changeset	1088
a61af66fc99e Initial load duke parents: diff changeset	1089 const MutableSpace* const space = _space_info[id].space();
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1090 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	1091 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	1092 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	1093
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1094 // Skip full regions at the beginning of the space--they are necessarily part
0 a61af66fc99e Initial load duke parents: diff changeset	1095 // of the dense prefix.
a61af66fc99e Initial load duke parents: diff changeset	1096 size_t full_count = 0;
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1097 const RegionData* cp;
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1098 for (cp = beg_cp; cp < end_cp && cp->data_size() == region_size; ++cp) {
0 a61af66fc99e Initial load duke parents: diff changeset	1099 ++full_count;
a61af66fc99e Initial load duke parents: diff changeset	1100 }
a61af66fc99e Initial load duke parents: diff changeset	1101
a61af66fc99e Initial load duke parents: diff changeset	1102 assert(total_invocations() >= _maximum_compaction_gc_num, "sanity");
a61af66fc99e Initial load duke parents: diff changeset	1103 const size_t gcs_since_max = total_invocations() - _maximum_compaction_gc_num;
a61af66fc99e Initial load duke parents: diff changeset	1104 const bool interval_ended = gcs_since_max > HeapMaximumCompactionInterval;
a61af66fc99e Initial load duke parents: diff changeset	1105 if (maximum_compaction \|\| cp == end_cp \|\| interval_ended) {
a61af66fc99e Initial load duke parents: diff changeset	1106 _maximum_compaction_gc_num = total_invocations();
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1107 return sd.region_to_addr(cp);
0 a61af66fc99e Initial load duke parents: diff changeset	1108 }
a61af66fc99e Initial load duke parents: diff changeset	1109
a61af66fc99e Initial load duke parents: diff changeset	1110 HeapWord* const new_top = _space_info[id].new_top();
a61af66fc99e Initial load duke parents: diff changeset	1111 const size_t space_live = pointer_delta(new_top, space->bottom());
a61af66fc99e Initial load duke parents: diff changeset	1112 const size_t space_used = space->used_in_words();
a61af66fc99e Initial load duke parents: diff changeset	1113 const size_t space_capacity = space->capacity_in_words();
a61af66fc99e Initial load duke parents: diff changeset	1114
a61af66fc99e Initial load duke parents: diff changeset	1115 const double cur_density = double(space_live) / space_capacity;
a61af66fc99e Initial load duke parents: diff changeset	1116 const double deadwood_density =
a61af66fc99e Initial load duke parents: diff changeset	1117 (1.0 - cur_density) * (1.0 - cur_density) * cur_density * cur_density;
a61af66fc99e Initial load duke parents: diff changeset	1118 const size_t deadwood_goal = size_t(space_capacity * deadwood_density);
a61af66fc99e Initial load duke parents: diff changeset	1119
a61af66fc99e Initial load duke parents: diff changeset	1120 if (TraceParallelOldGCDensePrefix) {
a61af66fc99e Initial load duke parents: diff changeset	1121 tty->print_cr("cur_dens=%5.3f dw_dens=%5.3f dw_goal=" SIZE_FORMAT,
a61af66fc99e Initial load duke parents: diff changeset	1122 cur_density, deadwood_density, deadwood_goal);
a61af66fc99e Initial load duke parents: diff changeset	1123 tty->print_cr("space_live=" SIZE_FORMAT " " "space_used=" SIZE_FORMAT " "
a61af66fc99e Initial load duke parents: diff changeset	1124 "space_cap=" SIZE_FORMAT,
a61af66fc99e Initial load duke parents: diff changeset	1125 space_live, space_used,
a61af66fc99e Initial load duke parents: diff changeset	1126 space_capacity);
a61af66fc99e Initial load duke parents: diff changeset	1127 }
a61af66fc99e Initial load duke parents: diff changeset	1128
a61af66fc99e Initial load duke parents: diff changeset	1129 // XXX - Use binary search?
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1130 HeapWord* dense_prefix = sd.region_to_addr(cp);
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1131 const RegionData* full_cp = cp;
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1132 const RegionData* const top_cp = sd.addr_to_region_ptr(space->top() - 1);
0 a61af66fc99e Initial load duke parents: diff changeset	1133 while (cp < end_cp) {
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1134 HeapWord* region_destination = cp->destination();
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1135 const size_t cur_deadwood = pointer_delta(dense_prefix, region_destination);
0 a61af66fc99e Initial load duke parents: diff changeset	1136 if (TraceParallelOldGCDensePrefix && Verbose) {
264 15dd2594d08e 6718283: existing uses of _FORMAT_W() were broken by 6521491 jcoomes* parents: 263 diff changeset	1137 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	1138 "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	1139 sd.region(cp), region_destination,
0 a61af66fc99e Initial load duke parents: diff changeset	1140 dense_prefix, cur_deadwood);
a61af66fc99e Initial load duke parents: diff changeset	1141 }
a61af66fc99e Initial load duke parents: diff changeset	1142
a61af66fc99e Initial load duke parents: diff changeset	1143 if (cur_deadwood >= deadwood_goal) {
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1144 // 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	1145 // 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	1146 // iterate backwards over those sparse regions, looking for the region
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1147 // 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	1148 size_t space_to_left = sd.region(cp) * region_size;
0 a61af66fc99e Initial load duke parents: diff changeset	1149 size_t live_to_left = space_to_left - cur_deadwood;
a61af66fc99e Initial load duke parents: diff changeset	1150 size_t space_to_right = space_capacity - space_to_left;
a61af66fc99e Initial load duke parents: diff changeset	1151 size_t live_to_right = space_live - live_to_left;
a61af66fc99e Initial load duke parents: diff changeset	1152 double density_to_right = double(live_to_right) / space_to_right;
a61af66fc99e Initial load duke parents: diff changeset	1153 while (cp > full_cp) {
a61af66fc99e Initial load duke parents: diff changeset	1154 --cp;
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1155 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	1156 cp->data_size();
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1157 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	1158 double prev_region_density_to_right =
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1159 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	1160 if (density_to_right <= prev_region_density_to_right) {
0 a61af66fc99e Initial load duke parents: diff changeset	1161 return dense_prefix;
a61af66fc99e Initial load duke parents: diff changeset	1162 }
a61af66fc99e Initial load duke parents: diff changeset	1163 if (TraceParallelOldGCDensePrefix && Verbose) {
264 15dd2594d08e 6718283: existing uses of _FORMAT_W() were broken by 6521491 jcoomes* parents: 263 diff changeset	1164 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	1165 "pc_d2r=%10.8f", sd.region(cp), density_to_right,
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1166 prev_region_density_to_right);
0 a61af66fc99e Initial load duke parents: diff changeset	1167 }
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1168 dense_prefix -= region_size;
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1169 live_to_right = prev_region_live_to_right;
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1170 space_to_right = prev_region_space_to_right;
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1171 density_to_right = prev_region_density_to_right;
0 a61af66fc99e Initial load duke parents: diff changeset	1172 }
a61af66fc99e Initial load duke parents: diff changeset	1173 return dense_prefix;
a61af66fc99e Initial load duke parents: diff changeset	1174 }
a61af66fc99e Initial load duke parents: diff changeset	1175
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1176 dense_prefix += region_size;
0 a61af66fc99e Initial load duke parents: diff changeset	1177 ++cp;
a61af66fc99e Initial load duke parents: diff changeset	1178 }
a61af66fc99e Initial load duke parents: diff changeset	1179
a61af66fc99e Initial load duke parents: diff changeset	1180 return dense_prefix;
a61af66fc99e Initial load duke parents: diff changeset	1181 }
a61af66fc99e Initial load duke parents: diff changeset	1182
a61af66fc99e Initial load duke parents: diff changeset	1183 #ifndef PRODUCT
a61af66fc99e Initial load duke parents: diff changeset	1184 void PSParallelCompact::print_dense_prefix_stats(const char* const algorithm,
a61af66fc99e Initial load duke parents: diff changeset	1185 const SpaceId id,
a61af66fc99e Initial load duke parents: diff changeset	1186 const bool maximum_compaction,
a61af66fc99e Initial load duke parents: diff changeset	1187 HeapWord* const addr)
a61af66fc99e Initial load duke parents: diff changeset	1188 {
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1189 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	1190 RegionData* const cp = summary_data().region(region_idx);
0 a61af66fc99e Initial load duke parents: diff changeset	1191 const MutableSpace* const space = _space_info[id].space();
a61af66fc99e Initial load duke parents: diff changeset	1192 HeapWord* const new_top = _space_info[id].new_top();
a61af66fc99e Initial load duke parents: diff changeset	1193
a61af66fc99e Initial load duke parents: diff changeset	1194 const size_t space_live = pointer_delta(new_top, space->bottom());
a61af66fc99e Initial load duke parents: diff changeset	1195 const size_t dead_to_left = pointer_delta(addr, cp->destination());
a61af66fc99e Initial load duke parents: diff changeset	1196 const size_t space_cap = space->capacity_in_words();
a61af66fc99e Initial load duke parents: diff changeset	1197 const double dead_to_left_pct = double(dead_to_left) / space_cap;
a61af66fc99e Initial load duke parents: diff changeset	1198 const size_t live_to_right = new_top - cp->destination();
a61af66fc99e Initial load duke parents: diff changeset	1199 const size_t dead_to_right = space->top() - addr - live_to_right;
a61af66fc99e Initial load duke parents: diff changeset	1200
264 15dd2594d08e 6718283: existing uses of _FORMAT_W() were broken by 6521491 jcoomes* parents: 263 diff changeset	1201 tty->print_cr("%s=" PTR_FORMAT " dpc=" SIZE_FORMAT_W(5) " "
0 a61af66fc99e Initial load duke parents: diff changeset	1202 "spl=" SIZE_FORMAT " "
a61af66fc99e Initial load duke parents: diff changeset	1203 "d2l=" SIZE_FORMAT " d2l%%=%6.4f "
a61af66fc99e Initial load duke parents: diff changeset	1204 "d2r=" SIZE_FORMAT " l2r=" SIZE_FORMAT
a61af66fc99e Initial load duke parents: diff changeset	1205 " ratio=%10.8f",
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1206 algorithm, addr, region_idx,
0 a61af66fc99e Initial load duke parents: diff changeset	1207 space_live,
a61af66fc99e Initial load duke parents: diff changeset	1208 dead_to_left, dead_to_left_pct,
a61af66fc99e Initial load duke parents: diff changeset	1209 dead_to_right, live_to_right,
a61af66fc99e Initial load duke parents: diff changeset	1210 double(dead_to_right) / live_to_right);
a61af66fc99e Initial load duke parents: diff changeset	1211 }
a61af66fc99e Initial load duke parents: diff changeset	1212 #endif // #ifndef PRODUCT
a61af66fc99e Initial load duke parents: diff changeset	1213
a61af66fc99e Initial load duke parents: diff changeset	1214 // Return a fraction indicating how much of the generation can be treated as
a61af66fc99e Initial load duke parents: diff changeset	1215 // "dead wood" (i.e., not reclaimed). The function uses a normal distribution
a61af66fc99e Initial load duke parents: diff changeset	1216 // based on the density of live objects in the generation to determine a limit,
a61af66fc99e Initial load duke parents: diff changeset	1217 // which is then adjusted so the return value is min_percent when the density is
a61af66fc99e Initial load duke parents: diff changeset	1218 // 1.
a61af66fc99e Initial load duke parents: diff changeset	1219 //
a61af66fc99e Initial load duke parents: diff changeset	1220 // The following table shows some return values for a different values of the
a61af66fc99e Initial load duke parents: diff changeset	1221 // standard deviation (ParallelOldDeadWoodLimiterStdDev); the mean is 0.5 and
a61af66fc99e Initial load duke parents: diff changeset	1222 // min_percent is 1.
a61af66fc99e Initial load duke parents: diff changeset	1223 //
a61af66fc99e Initial load duke parents: diff changeset	1224 // fraction allowed as dead wood
a61af66fc99e Initial load duke parents: diff changeset	1225 // -----------------------------------------------------------------
a61af66fc99e Initial load duke parents: diff changeset	1226 // 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	1227 // ------- ---------- ---------- ---------- ---------- ---------- ----------
a61af66fc99e Initial load duke parents: diff changeset	1228 // 0.00000 0.01000000 0.01000000 0.01000000 0.01000000 0.01000000 0.01000000
a61af66fc99e Initial load duke parents: diff changeset	1229 // 0.05000 0.03193096 0.02836880 0.02550828 0.02319280 0.02130337 0.01974941
a61af66fc99e Initial load duke parents: diff changeset	1230 // 0.10000 0.05247504 0.04547452 0.03988045 0.03537016 0.03170171 0.02869272
a61af66fc99e Initial load duke parents: diff changeset	1231 // 0.15000 0.07135702 0.06111390 0.05296419 0.04641639 0.04110601 0.03676066
a61af66fc99e Initial load duke parents: diff changeset	1232 // 0.20000 0.08831616 0.07509618 0.06461766 0.05622444 0.04943437 0.04388975
a61af66fc99e Initial load duke parents: diff changeset	1233 // 0.25000 0.10311208 0.08724696 0.07471205 0.06469760 0.05661313 0.05002313
a61af66fc99e Initial load duke parents: diff changeset	1234 // 0.30000 0.11553050 0.09741183 0.08313394 0.07175114 0.06257797 0.05511132
a61af66fc99e Initial load duke parents: diff changeset	1235 // 0.35000 0.12538832 0.10545958 0.08978741 0.07731366 0.06727491 0.05911289
a61af66fc99e Initial load duke parents: diff changeset	1236 // 0.40000 0.13253818 0.11128511 0.09459590 0.08132834 0.07066107 0.06199500
a61af66fc99e Initial load duke parents: diff changeset	1237 // 0.45000 0.13687208 0.11481163 0.09750361 0.08375387 0.07270534 0.06373386
a61af66fc99e Initial load duke parents: diff changeset	1238 // 0.50000 0.13832410 0.11599237 0.09847664 0.08456518 0.07338887 0.06431510
a61af66fc99e Initial load duke parents: diff changeset	1239 // 0.55000 0.13687208 0.11481163 0.09750361 0.08375387 0.07270534 0.06373386
a61af66fc99e Initial load duke parents: diff changeset	1240 // 0.60000 0.13253818 0.11128511 0.09459590 0.08132834 0.07066107 0.06199500
a61af66fc99e Initial load duke parents: diff changeset	1241 // 0.65000 0.12538832 0.10545958 0.08978741 0.07731366 0.06727491 0.05911289
a61af66fc99e Initial load duke parents: diff changeset	1242 // 0.70000 0.11553050 0.09741183 0.08313394 0.07175114 0.06257797 0.05511132
a61af66fc99e Initial load duke parents: diff changeset	1243 // 0.75000 0.10311208 0.08724696 0.07471205 0.06469760 0.05661313 0.05002313
a61af66fc99e Initial load duke parents: diff changeset	1244 // 0.80000 0.08831616 0.07509618 0.06461766 0.05622444 0.04943437 0.04388975
a61af66fc99e Initial load duke parents: diff changeset	1245 // 0.85000 0.07135702 0.06111390 0.05296419 0.04641639 0.04110601 0.03676066
a61af66fc99e Initial load duke parents: diff changeset	1246 // 0.90000 0.05247504 0.04547452 0.03988045 0.03537016 0.03170171 0.02869272
a61af66fc99e Initial load duke parents: diff changeset	1247 // 0.95000 0.03193096 0.02836880 0.02550828 0.02319280 0.02130337 0.01974941
a61af66fc99e Initial load duke parents: diff changeset	1248 // 1.00000 0.01000000 0.01000000 0.01000000 0.01000000 0.01000000 0.01000000
a61af66fc99e Initial load duke parents: diff changeset	1249
a61af66fc99e Initial load duke parents: diff changeset	1250 double PSParallelCompact::dead_wood_limiter(double density, size_t min_percent)
a61af66fc99e Initial load duke parents: diff changeset	1251 {
a61af66fc99e Initial load duke parents: diff changeset	1252 assert(_dwl_initialized, "uninitialized");
a61af66fc99e Initial load duke parents: diff changeset	1253
a61af66fc99e Initial load duke parents: diff changeset	1254 // The raw limit is the value of the normal distribution at x = density.
a61af66fc99e Initial load duke parents: diff changeset	1255 const double raw_limit = normal_distribution(density);
a61af66fc99e Initial load duke parents: diff changeset	1256
a61af66fc99e Initial load duke parents: diff changeset	1257 // Adjust the raw limit so it becomes the minimum when the density is 1.
a61af66fc99e Initial load duke parents: diff changeset	1258 //
a61af66fc99e Initial load duke parents: diff changeset	1259 // First subtract the adjustment value (which is simply the precomputed value
a61af66fc99e Initial load duke parents: diff changeset	1260 // normal_distribution(1.0)); this yields a value of 0 when the density is 1.
a61af66fc99e Initial load duke parents: diff changeset	1261 // Then add the minimum value, so the minimum is returned when the density is
a61af66fc99e Initial load duke parents: diff changeset	1262 // 1. Finally, prevent negative values, which occur when the mean is not 0.5.
a61af66fc99e Initial load duke parents: diff changeset	1263 const double min = double(min_percent) / 100.0;
a61af66fc99e Initial load duke parents: diff changeset	1264 const double limit = raw_limit - _dwl_adjustment + min;
a61af66fc99e Initial load duke parents: diff changeset	1265 return MAX2(limit, 0.0);
a61af66fc99e Initial load duke parents: diff changeset	1266 }
a61af66fc99e Initial load duke parents: diff changeset	1267
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1268 ParallelCompactData::RegionData*
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1269 PSParallelCompact::first_dead_space_region(const RegionData* beg,
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1270 const RegionData* end)
0 a61af66fc99e Initial load duke parents: diff changeset	1271 {
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1272 const size_t region_size = ParallelCompactData::RegionSize;
0 a61af66fc99e Initial load duke parents: diff changeset	1273 ParallelCompactData& sd = summary_data();
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1274 size_t left = sd.region(beg);
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1275 size_t right = end > beg ? sd.region(end) - 1 : left;
0 a61af66fc99e Initial load duke parents: diff changeset	1276
a61af66fc99e Initial load duke parents: diff changeset	1277 // Binary search.
a61af66fc99e Initial load duke parents: diff changeset	1278 while (left < right) {
a61af66fc99e Initial load duke parents: diff changeset	1279 // Equivalent to (left + right) / 2, but does not overflow.
a61af66fc99e Initial load duke parents: diff changeset	1280 const size_t middle = left + (right - left) / 2;
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1281 RegionData* const middle_ptr = sd.region(middle);
0 a61af66fc99e Initial load duke parents: diff changeset	1282 HeapWord* const dest = middle_ptr->destination();
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1283 HeapWord* const addr = sd.region_to_addr(middle);
0 a61af66fc99e Initial load duke parents: diff changeset	1284 assert(dest != NULL, "sanity");
a61af66fc99e Initial load duke parents: diff changeset	1285 assert(dest <= addr, "must move left");
a61af66fc99e Initial load duke parents: diff changeset	1286
a61af66fc99e Initial load duke parents: diff changeset	1287 if (middle > left && dest < addr) {
a61af66fc99e Initial load duke parents: diff changeset	1288 right = middle - 1;
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1289 } else if (middle < right && middle_ptr->data_size() == region_size) {
0 a61af66fc99e Initial load duke parents: diff changeset	1290 left = middle + 1;
a61af66fc99e Initial load duke parents: diff changeset	1291 } else {
a61af66fc99e Initial load duke parents: diff changeset	1292 return middle_ptr;
a61af66fc99e Initial load duke parents: diff changeset	1293 }
a61af66fc99e Initial load duke parents: diff changeset	1294 }
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1295 return sd.region(left);
0 a61af66fc99e Initial load duke parents: diff changeset	1296 }
a61af66fc99e Initial load duke parents: diff changeset	1297
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1298 ParallelCompactData::RegionData*
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1299 PSParallelCompact::dead_wood_limit_region(const RegionData* beg,
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1300 const RegionData* end,
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1301 size_t dead_words)
0 a61af66fc99e Initial load duke parents: diff changeset	1302 {
a61af66fc99e Initial load duke parents: diff changeset	1303 ParallelCompactData& sd = summary_data();
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1304 size_t left = sd.region(beg);
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1305 size_t right = end > beg ? sd.region(end) - 1 : left;
0 a61af66fc99e Initial load duke parents: diff changeset	1306
a61af66fc99e Initial load duke parents: diff changeset	1307 // Binary search.
a61af66fc99e Initial load duke parents: diff changeset	1308 while (left < right) {
a61af66fc99e Initial load duke parents: diff changeset	1309 // Equivalent to (left + right) / 2, but does not overflow.
a61af66fc99e Initial load duke parents: diff changeset	1310 const size_t middle = left + (right - left) / 2;
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1311 RegionData* const middle_ptr = sd.region(middle);
0 a61af66fc99e Initial load duke parents: diff changeset	1312 HeapWord* const dest = middle_ptr->destination();
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1313 HeapWord* const addr = sd.region_to_addr(middle);
0 a61af66fc99e Initial load duke parents: diff changeset	1314 assert(dest != NULL, "sanity");
a61af66fc99e Initial load duke parents: diff changeset	1315 assert(dest <= addr, "must move left");
a61af66fc99e Initial load duke parents: diff changeset	1316
a61af66fc99e Initial load duke parents: diff changeset	1317 const size_t dead_to_left = pointer_delta(addr, dest);
a61af66fc99e Initial load duke parents: diff changeset	1318 if (middle > left && dead_to_left > dead_words) {
a61af66fc99e Initial load duke parents: diff changeset	1319 right = middle - 1;
a61af66fc99e Initial load duke parents: diff changeset	1320 } else if (middle < right && dead_to_left < dead_words) {
a61af66fc99e Initial load duke parents: diff changeset	1321 left = middle + 1;
a61af66fc99e Initial load duke parents: diff changeset	1322 } else {
a61af66fc99e Initial load duke parents: diff changeset	1323 return middle_ptr;
a61af66fc99e Initial load duke parents: diff changeset	1324 }
a61af66fc99e Initial load duke parents: diff changeset	1325 }
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1326 return sd.region(left);
0 a61af66fc99e Initial load duke parents: diff changeset	1327 }
a61af66fc99e Initial load duke parents: diff changeset	1328
a61af66fc99e Initial load duke parents: diff changeset	1329 // The result is valid during the summary phase, after the initial summarization
a61af66fc99e Initial load duke parents: diff changeset	1330 // of each space into itself, and before final summarization.
a61af66fc99e Initial load duke parents: diff changeset	1331 inline double
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1332 PSParallelCompact::reclaimed_ratio(const RegionData* const cp,
0 a61af66fc99e Initial load duke parents: diff changeset	1333 HeapWord* const bottom,
a61af66fc99e Initial load duke parents: diff changeset	1334 HeapWord* const top,
a61af66fc99e Initial load duke parents: diff changeset	1335 HeapWord* const new_top)
a61af66fc99e Initial load duke parents: diff changeset	1336 {
a61af66fc99e Initial load duke parents: diff changeset	1337 ParallelCompactData& sd = summary_data();
a61af66fc99e Initial load duke parents: diff changeset	1338
a61af66fc99e Initial load duke parents: diff changeset	1339 assert(cp != NULL, "sanity");
a61af66fc99e Initial load duke parents: diff changeset	1340 assert(bottom != NULL, "sanity");
a61af66fc99e Initial load duke parents: diff changeset	1341 assert(top != NULL, "sanity");
a61af66fc99e Initial load duke parents: diff changeset	1342 assert(new_top != NULL, "sanity");
a61af66fc99e Initial load duke parents: diff changeset	1343 assert(top >= new_top, "summary data problem?");
a61af66fc99e Initial load duke parents: diff changeset	1344 assert(new_top > bottom, "space is empty; should not be here");
a61af66fc99e Initial load duke parents: diff changeset	1345 assert(new_top >= cp->destination(), "sanity");
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1346 assert(top >= sd.region_to_addr(cp), "sanity");
0 a61af66fc99e Initial load duke parents: diff changeset	1347
a61af66fc99e Initial load duke parents: diff changeset	1348 HeapWord* const destination = cp->destination();
a61af66fc99e Initial load duke parents: diff changeset	1349 const size_t dense_prefix_live = pointer_delta(destination, bottom);
a61af66fc99e Initial load duke parents: diff changeset	1350 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	1351 const size_t compacted_region_used = pointer_delta(top,
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1352 sd.region_to_addr(cp));
0 a61af66fc99e Initial load duke parents: diff changeset	1353 const size_t reclaimable = compacted_region_used - compacted_region_live;
a61af66fc99e Initial load duke parents: diff changeset	1354
a61af66fc99e Initial load duke parents: diff changeset	1355 const double divisor = dense_prefix_live + 1.25 * compacted_region_live;
a61af66fc99e Initial load duke parents: diff changeset	1356 return double(reclaimable) / divisor;
a61af66fc99e Initial load duke parents: diff changeset	1357 }
a61af66fc99e Initial load duke parents: diff changeset	1358
a61af66fc99e Initial load duke parents: diff changeset	1359 // 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	1360 // compacted region. The address is always on a region boundary.
0 a61af66fc99e Initial load duke parents: diff changeset	1361 //
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1362 // 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	1363 // 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	1364 // 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	1365 // 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	1366 // 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	1367 // 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	1368 // (maximum) reclaimed_ratio() is selected.
0 a61af66fc99e Initial load duke parents: diff changeset	1369 HeapWord*
a61af66fc99e Initial load duke parents: diff changeset	1370 PSParallelCompact::compute_dense_prefix(const SpaceId id,
a61af66fc99e Initial load duke parents: diff changeset	1371 bool maximum_compaction)
a61af66fc99e Initial load duke parents: diff changeset	1372 {
483 0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1373 if (ParallelOldGCSplitALot) {
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1374 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	1375 // 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	1376 return _space_info[id].dense_prefix();
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1377 }
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1378 }
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1379
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1380 const size_t region_size = ParallelCompactData::RegionSize;
0 a61af66fc99e Initial load duke parents: diff changeset	1381 const ParallelCompactData& sd = summary_data();
a61af66fc99e Initial load duke parents: diff changeset	1382
a61af66fc99e Initial load duke parents: diff changeset	1383 const MutableSpace* const space = _space_info[id].space();
a61af66fc99e Initial load duke parents: diff changeset	1384 HeapWord* const top = space->top();
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1385 HeapWord* const top_aligned_up = sd.region_align_up(top);
0 a61af66fc99e Initial load duke parents: diff changeset	1386 HeapWord* const new_top = _space_info[id].new_top();
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1387 HeapWord* const new_top_aligned_up = sd.region_align_up(new_top);
0 a61af66fc99e Initial load duke parents: diff changeset	1388 HeapWord* const bottom = space->bottom();
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1389 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	1390 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	1391 const RegionData* const new_top_cp =
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1392 sd.addr_to_region_ptr(new_top_aligned_up);
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1393
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1394 // Skip full regions at the beginning of the space--they are necessarily part
0 a61af66fc99e Initial load duke parents: diff changeset	1395 // of the dense prefix.
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1396 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	1397 assert(full_cp->destination() == sd.region_to_addr(full_cp) \|\|
0 a61af66fc99e Initial load duke parents: diff changeset	1398 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	1399 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	1400 "region must have dead space");
0 a61af66fc99e Initial load duke parents: diff changeset	1401
a61af66fc99e Initial load duke parents: diff changeset	1402 // The gc number is saved whenever a maximum compaction is done, and used to
a61af66fc99e Initial load duke parents: diff changeset	1403 // determine when the maximum compaction interval has expired. This avoids
a61af66fc99e Initial load duke parents: diff changeset	1404 // successive max compactions for different reasons.
a61af66fc99e Initial load duke parents: diff changeset	1405 assert(total_invocations() >= _maximum_compaction_gc_num, "sanity");
a61af66fc99e Initial load duke parents: diff changeset	1406 const size_t gcs_since_max = total_invocations() - _maximum_compaction_gc_num;
a61af66fc99e Initial load duke parents: diff changeset	1407 const bool interval_ended = gcs_since_max > HeapMaximumCompactionInterval \|\|
a61af66fc99e Initial load duke parents: diff changeset	1408 total_invocations() == HeapFirstMaximumCompactionCount;
a61af66fc99e Initial load duke parents: diff changeset	1409 if (maximum_compaction \|\| full_cp == top_cp \|\| interval_ended) {
a61af66fc99e Initial load duke parents: diff changeset	1410 _maximum_compaction_gc_num = total_invocations();
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1411 return sd.region_to_addr(full_cp);
0 a61af66fc99e Initial load duke parents: diff changeset	1412 }
a61af66fc99e Initial load duke parents: diff changeset	1413
a61af66fc99e Initial load duke parents: diff changeset	1414 const size_t space_live = pointer_delta(new_top, bottom);
a61af66fc99e Initial load duke parents: diff changeset	1415 const size_t space_used = space->used_in_words();
a61af66fc99e Initial load duke parents: diff changeset	1416 const size_t space_capacity = space->capacity_in_words();
a61af66fc99e Initial load duke parents: diff changeset	1417
a61af66fc99e Initial load duke parents: diff changeset	1418 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	1419 const size_t min_percent_free = MarkSweepDeadRatio;
0 a61af66fc99e Initial load duke parents: diff changeset	1420 const double limiter = dead_wood_limiter(density, min_percent_free);
a61af66fc99e Initial load duke parents: diff changeset	1421 const size_t dead_wood_max = space_used - space_live;
a61af66fc99e Initial load duke parents: diff changeset	1422 const size_t dead_wood_limit = MIN2(size_t(space_capacity * limiter),
a61af66fc99e Initial load duke parents: diff changeset	1423 dead_wood_max);
a61af66fc99e Initial load duke parents: diff changeset	1424
a61af66fc99e Initial load duke parents: diff changeset	1425 if (TraceParallelOldGCDensePrefix) {
a61af66fc99e Initial load duke parents: diff changeset	1426 tty->print_cr("space_live=" SIZE_FORMAT " " "space_used=" SIZE_FORMAT " "
a61af66fc99e Initial load duke parents: diff changeset	1427 "space_cap=" SIZE_FORMAT,
a61af66fc99e Initial load duke parents: diff changeset	1428 space_live, space_used,
a61af66fc99e Initial load duke parents: diff changeset	1429 space_capacity);
a61af66fc99e Initial load duke parents: diff changeset	1430 tty->print_cr("dead_wood_limiter(%6.4f, %d)=%6.4f "
a61af66fc99e Initial load duke parents: diff changeset	1431 "dead_wood_max=" SIZE_FORMAT " dead_wood_limit=" SIZE_FORMAT,
a61af66fc99e Initial load duke parents: diff changeset	1432 density, min_percent_free, limiter,
a61af66fc99e Initial load duke parents: diff changeset	1433 dead_wood_max, dead_wood_limit);
a61af66fc99e Initial load duke parents: diff changeset	1434 }
a61af66fc99e Initial load duke parents: diff changeset	1435
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1436 // 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	1437 const RegionData* const limit_cp =
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1438 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	1439
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1440 // Scan from the first region with dead space to the limit region and find the
0 a61af66fc99e Initial load duke parents: diff changeset	1441 // one with the best (largest) reclaimed ratio.
a61af66fc99e Initial load duke parents: diff changeset	1442 double best_ratio = 0.0;
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1443 const RegionData* best_cp = full_cp;
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1444 for (const RegionData* cp = full_cp; cp < limit_cp; ++cp) {
0 a61af66fc99e Initial load duke parents: diff changeset	1445 double tmp_ratio = reclaimed_ratio(cp, bottom, top, new_top);
a61af66fc99e Initial load duke parents: diff changeset	1446 if (tmp_ratio > best_ratio) {
a61af66fc99e Initial load duke parents: diff changeset	1447 best_cp = cp;
a61af66fc99e Initial load duke parents: diff changeset	1448 best_ratio = tmp_ratio;
a61af66fc99e Initial load duke parents: diff changeset	1449 }
a61af66fc99e Initial load duke parents: diff changeset	1450 }
a61af66fc99e Initial load duke parents: diff changeset	1451
a61af66fc99e Initial load duke parents: diff changeset	1452 #if 0
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1453 // 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	1454 // 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	1455 // ("first-free"). The first-free region is usually near the start of the
0 a61af66fc99e Initial load duke parents: diff changeset	1456 // heap, which means we are copying most of the heap already, so copy a bit
a61af66fc99e Initial load duke parents: diff changeset	1457 // more to get complete compaction.
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1458 if (pointer_delta(best_cp, full_cp, sizeof(RegionData)) < 4) {
0 a61af66fc99e Initial load duke parents: diff changeset	1459 _maximum_compaction_gc_num = total_invocations();
a61af66fc99e Initial load duke parents: diff changeset	1460 best_cp = full_cp;
a61af66fc99e Initial load duke parents: diff changeset	1461 }
a61af66fc99e Initial load duke parents: diff changeset	1462 #endif // #if 0
a61af66fc99e Initial load duke parents: diff changeset	1463
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1464 return sd.region_to_addr(best_cp);
0 a61af66fc99e Initial load duke parents: diff changeset	1465 }
a61af66fc99e Initial load duke parents: diff changeset	1466
483 0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1467 #ifndef PRODUCT
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1468 void
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1469 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	1470 size_t words)
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1471 {
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1472 if (TraceParallelOldGCSummaryPhase) {
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1473 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	1474 SIZE_FORMAT, start, start + words, words);
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1475 }
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1476
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1477 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	1478 CollectedHeap::fill_with_objects(start, words);
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1479 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	1480 _mark_bitmap.mark_obj(p, words);
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1481 _summary_data.add_obj(p, words);
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1482 start_array->allocate_block(p);
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1483 }
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1484 }
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 void
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1487 PSParallelCompact::summarize_new_objects(SpaceId id, HeapWord* start)
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1488 {
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1489 ParallelCompactData& sd = summary_data();
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1490 MutableSpace* space = _space_info[id].space();
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1491
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1492 // Find the source and destination start addresses.
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1493 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	1494 HeapWord* dst_addr;
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1495 if (src_addr < start) {
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1496 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	1497 } else if (src_addr > space->bottom()) {
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1498 // 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	1499 // 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	1500 // destination from the previous region.
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1501 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	1502 dst_addr = cp->destination() + cp->data_size();
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1503 } else {
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1504 // Filling the entire space.
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1505 dst_addr = space->bottom();
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1506 }
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1507 assert(dst_addr != NULL, "sanity");
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1508
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1509 // Update the summary data.
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1510 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	1511 src_addr, space->top(), NULL,
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1512 dst_addr, space->end(),
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1513 _space_info[id].new_top_addr());
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1514 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	1515 }
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1516
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1517 void
496 b27c885f75f9 6786188: par compact - "SplitALot" stress mode should fill to_space jcoomes parents: 495 diff changeset	1518 PSParallelCompact::provoke_split_fill_survivor(SpaceId id)
b27c885f75f9 6786188: par compact - "SplitALot" stress mode should fill to_space jcoomes parents: 495 diff changeset	1519 {
b27c885f75f9 6786188: par compact - "SplitALot" stress mode should fill to_space jcoomes parents: 495 diff changeset	1520 if (total_invocations() % (ParallelOldGCSplitInterval * 3) != 0) {
b27c885f75f9 6786188: par compact - "SplitALot" stress mode should fill to_space jcoomes parents: 495 diff changeset	1521 return;
b27c885f75f9 6786188: par compact - "SplitALot" stress mode should fill to_space jcoomes parents: 495 diff changeset	1522 }
b27c885f75f9 6786188: par compact - "SplitALot" stress mode should fill to_space jcoomes parents: 495 diff changeset	1523
b27c885f75f9 6786188: par compact - "SplitALot" stress mode should fill to_space jcoomes parents: 495 diff changeset	1524 MutableSpace* const space = _space_info[id].space();
b27c885f75f9 6786188: par compact - "SplitALot" stress mode should fill to_space jcoomes parents: 495 diff changeset	1525 if (space->is_empty()) {
b27c885f75f9 6786188: par compact - "SplitALot" stress mode should fill to_space jcoomes parents: 495 diff changeset	1526 HeapWord* b = space->bottom();
b27c885f75f9 6786188: par compact - "SplitALot" stress mode should fill to_space jcoomes parents: 495 diff changeset	1527 HeapWord* t = b + space->capacity_in_words() / 2;
b27c885f75f9 6786188: par compact - "SplitALot" stress mode should fill to_space jcoomes parents: 495 diff changeset	1528 space->set_top(t);
b27c885f75f9 6786188: par compact - "SplitALot" stress mode should fill to_space jcoomes parents: 495 diff changeset	1529 if (ZapUnusedHeapArea) {
b27c885f75f9 6786188: par compact - "SplitALot" stress mode should fill to_space jcoomes parents: 495 diff changeset	1530 space->set_top_for_allocations();
b27c885f75f9 6786188: par compact - "SplitALot" stress mode should fill to_space jcoomes parents: 495 diff changeset	1531 }
b27c885f75f9 6786188: par compact - "SplitALot" stress mode should fill to_space jcoomes parents: 495 diff changeset	1532
1571 2d127394260e 6916623: Align object to 16 bytes to use Compressed Oops with java heap up to 64Gb kvn parents: 1489 diff changeset	1533 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	1534 size_t obj_len = min_size;
496 b27c885f75f9 6786188: par compact - "SplitALot" stress mode should fill to_space jcoomes parents: 495 diff changeset	1535 while (b + obj_len <= t) {
b27c885f75f9 6786188: par compact - "SplitALot" stress mode should fill to_space jcoomes parents: 495 diff changeset	1536 CollectedHeap::fill_with_object(b, obj_len);
b27c885f75f9 6786188: par compact - "SplitALot" stress mode should fill to_space jcoomes parents: 495 diff changeset	1537 mark_bitmap()->mark_obj(b, obj_len);
b27c885f75f9 6786188: par compact - "SplitALot" stress mode should fill to_space jcoomes parents: 495 diff changeset	1538 summary_data().add_obj(b, obj_len);
b27c885f75f9 6786188: par compact - "SplitALot" stress mode should fill to_space jcoomes parents: 495 diff changeset	1539 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	1540 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	1541 }
b27c885f75f9 6786188: par compact - "SplitALot" stress mode should fill to_space jcoomes parents: 495 diff changeset	1542 if (b < t) {
b27c885f75f9 6786188: par compact - "SplitALot" stress mode should fill to_space jcoomes parents: 495 diff changeset	1543 // 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	1544 space->set_top(b);
b27c885f75f9 6786188: par compact - "SplitALot" stress mode should fill to_space jcoomes parents: 495 diff changeset	1545 if (ZapUnusedHeapArea) {
b27c885f75f9 6786188: par compact - "SplitALot" stress mode should fill to_space jcoomes parents: 495 diff changeset	1546 space->set_top_for_allocations();
b27c885f75f9 6786188: par compact - "SplitALot" stress mode should fill to_space jcoomes parents: 495 diff changeset	1547 }
b27c885f75f9 6786188: par compact - "SplitALot" stress mode should fill to_space jcoomes parents: 495 diff changeset	1548 }
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 HeapWord** nta = _space_info[id].new_top_addr();
b27c885f75f9 6786188: par compact - "SplitALot" stress mode should fill to_space jcoomes parents: 495 diff changeset	1551 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	1552 space->bottom(), space->top(), NULL,
b27c885f75f9 6786188: par compact - "SplitALot" stress mode should fill to_space jcoomes parents: 495 diff changeset	1553 space->bottom(), space->end(), nta);
b27c885f75f9 6786188: par compact - "SplitALot" stress mode should fill to_space jcoomes parents: 495 diff changeset	1554 assert(result, "space must fit into itself");
b27c885f75f9 6786188: par compact - "SplitALot" stress mode should fill to_space jcoomes parents: 495 diff changeset	1555 }
b27c885f75f9 6786188: par compact - "SplitALot" stress mode should fill to_space jcoomes parents: 495 diff changeset	1556 }
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 void
483 0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1559 PSParallelCompact::provoke_split(bool & max_compaction)
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1560 {
496 b27c885f75f9 6786188: par compact - "SplitALot" stress mode should fill to_space jcoomes parents: 495 diff changeset	1561 if (total_invocations() % ParallelOldGCSplitInterval != 0) {
b27c885f75f9 6786188: par compact - "SplitALot" stress mode should fill to_space jcoomes parents: 495 diff changeset	1562 return;
b27c885f75f9 6786188: par compact - "SplitALot" stress mode should fill to_space jcoomes parents: 495 diff changeset	1563 }
b27c885f75f9 6786188: par compact - "SplitALot" stress mode should fill to_space jcoomes parents: 495 diff changeset	1564
483 0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1565 const size_t region_size = ParallelCompactData::RegionSize;
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1566 ParallelCompactData& sd = summary_data();
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1567
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1568 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	1569 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	1570 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	1571 _space_info[eden_space_id].new_top());
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1572 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	1573 _space_info[from_space_id].new_top());
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 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	1576 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	1577 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	1578 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	1579 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	1580
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1581 // 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	1582 SpaceId id;
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1583 MutableSpace* space;
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1584 size_t live_words;
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1585 size_t fill_words;
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1586 if (eden_live + eden_fillable >= region_size * 2) {
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1587 id = eden_space_id;
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1588 space = eden_space;
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1589 live_words = eden_live;
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1590 fill_words = eden_fillable;
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1591 } 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	1592 id = from_space_id;
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1593 space = from_space;
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1594 live_words = from_live;
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1595 fill_words = from_fillable;
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1596 } else {
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1597 return; // Give up.
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1598 }
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1599 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	1600
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1601 if (live_words < region_size * 2) {
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1602 // 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	1603 HeapWord* const fill_start = space->top();
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1604 live_words += fill_words;
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1605
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1606 space->set_top(fill_start + fill_words);
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1607 if (ZapUnusedHeapArea) {
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1608 space->set_top_for_allocations();
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1609 }
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1610
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1611 HeapWord* cur_addr = fill_start;
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1612 while (fill_words > 0) {
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1613 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	1614 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	1615 if (fill_words - cur_size < min_fill_size) {
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1616 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	1617 }
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1618
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1619 CollectedHeap::fill_with_object(cur_addr, cur_size);
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1620 mark_bitmap()->mark_obj(cur_addr, cur_size);
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1621 sd.add_obj(cur_addr, cur_size);
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 cur_addr += cur_size;
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1624 fill_words -= cur_size;
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
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1627 summarize_new_objects(id, fill_start);
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1628 }
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1629
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1630 max_compaction = false;
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1631
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1632 // 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	1633 // 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	1634 id = old_space_id;
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1635 space = _space_info[id].space();
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1636 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	1637 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	1638 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	1639
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1640 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	1641 // 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	1642 HeapWord* const fill_start = space->top();
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1643 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	1644 space->set_top(space->top() + fill_size);
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1645 if (ZapUnusedHeapArea) {
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1646 space->set_top_for_allocations();
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1647 }
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1648 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	1649 summarize_new_objects(id, fill_start);
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1650 _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	1651 } else if (dead + free_at_end > free_target) {
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1652 // 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	1653 HeapWord* cur = sd.region_align_down(space->top());
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1654 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	1655 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	1656 while (dead_to_right < free_target) {
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1657 cur -= region_size;
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1658 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	1659 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	1660 }
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1661 _space_info[id].set_dense_prefix(cur);
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1662 }
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1663 }
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1664 #endif // #ifndef PRODUCT
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1665
0 a61af66fc99e Initial load duke parents: diff changeset	1666 void PSParallelCompact::summarize_spaces_quick()
a61af66fc99e Initial load duke parents: diff changeset	1667 {
a61af66fc99e Initial load duke parents: diff changeset	1668 for (unsigned int i = 0; i < last_space_id; ++i) {
a61af66fc99e Initial load duke parents: diff changeset	1669 const MutableSpace* space = _space_info[i].space();
482 7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1670 HeapWord** nta = _space_info[i].new_top_addr();
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1671 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	1672 space->bottom(), space->top(), NULL,
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1673 space->bottom(), space->end(), nta);
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1674 assert(result, "space must fit into itself");
0 a61af66fc99e Initial load duke parents: diff changeset	1675 _space_info[i].set_dense_prefix(space->bottom());
a61af66fc99e Initial load duke parents: diff changeset	1676 }
496 b27c885f75f9 6786188: par compact - "SplitALot" stress mode should fill to_space jcoomes parents: 495 diff changeset	1677
b27c885f75f9 6786188: par compact - "SplitALot" stress mode should fill to_space jcoomes parents: 495 diff changeset	1678 #ifndef PRODUCT
b27c885f75f9 6786188: par compact - "SplitALot" stress mode should fill to_space jcoomes parents: 495 diff changeset	1679 if (ParallelOldGCSplitALot) {
b27c885f75f9 6786188: par compact - "SplitALot" stress mode should fill to_space jcoomes parents: 495 diff changeset	1680 provoke_split_fill_survivor(to_space_id);
b27c885f75f9 6786188: par compact - "SplitALot" stress mode should fill to_space jcoomes parents: 495 diff changeset	1681 }
b27c885f75f9 6786188: par compact - "SplitALot" stress mode should fill to_space jcoomes parents: 495 diff changeset	1682 #endif // #ifndef PRODUCT
0 a61af66fc99e Initial load duke parents: diff changeset	1683 }
a61af66fc99e Initial load duke parents: diff changeset	1684
a61af66fc99e Initial load duke parents: diff changeset	1685 void PSParallelCompact::fill_dense_prefix_end(SpaceId id)
a61af66fc99e Initial load duke parents: diff changeset	1686 {
a61af66fc99e Initial load duke parents: diff changeset	1687 HeapWord* const dense_prefix_end = dense_prefix(id);
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1688 const RegionData* region = _summary_data.addr_to_region_ptr(dense_prefix_end);
0 a61af66fc99e Initial load duke parents: diff changeset	1689 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	1690 if (dead_space_crosses_boundary(region, dense_prefix_bit)) {
0 a61af66fc99e Initial load duke parents: diff changeset	1691 // Only enough dead space is filled so that any remaining dead space to the
a61af66fc99e Initial load duke parents: diff changeset	1692 // left is larger than the minimum filler object. (The remainder is filled
a61af66fc99e Initial load duke parents: diff changeset	1693 // during the copy/update phase.)
a61af66fc99e Initial load duke parents: diff changeset	1694 //
a61af66fc99e Initial load duke parents: diff changeset	1695 // The size of the dead space to the right of the boundary is not a
a61af66fc99e Initial load duke parents: diff changeset	1696 // concern, since compaction will be able to use whatever space is
a61af66fc99e Initial load duke parents: diff changeset	1697 // available.
a61af66fc99e Initial load duke parents: diff changeset	1698 //
a61af66fc99e Initial load duke parents: diff changeset	1699 // Here '\|\|' is the boundary, 'x' represents a don't care bit and a box
a61af66fc99e Initial load duke parents: diff changeset	1700 // surrounds the space to be filled with an object.
a61af66fc99e Initial load duke parents: diff changeset	1701 //
a61af66fc99e Initial load duke parents: diff changeset	1702 // In the 32-bit VM, each bit represents two 32-bit words:
a61af66fc99e Initial load duke parents: diff changeset	1703 // +---+
a61af66fc99e Initial load duke parents: diff changeset	1704 // a) beg_bits: ... x x x \| 0 \| \|\| 0 x x ...
a61af66fc99e Initial load duke parents: diff changeset	1705 // end_bits: ... x x x \| 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 // In the 64-bit VM, each bit represents one 64-bit word:
a61af66fc99e Initial load duke parents: diff changeset	1709 // +------------+
a61af66fc99e Initial load duke parents: diff changeset	1710 // b) beg_bits: ... x x x \| 0 \|\| 0 \| x x ...
a61af66fc99e Initial load duke parents: diff changeset	1711 // end_bits: ... x x 1 \| 0 \|\| 0 \| x x ...
a61af66fc99e Initial load duke parents: diff changeset	1712 // +------------+
a61af66fc99e Initial load duke parents: diff changeset	1713 // +-------+
a61af66fc99e Initial load duke parents: diff changeset	1714 // c) beg_bits: ... x x \| 0 0 \| \|\| 0 x x ...
a61af66fc99e Initial load duke parents: diff changeset	1715 // end_bits: ... x 1 \| 0 0 \| \|\| 0 x x ...
a61af66fc99e Initial load duke parents: diff changeset	1716 // +-------+
a61af66fc99e Initial load duke parents: diff changeset	1717 // +-----------+
a61af66fc99e Initial load duke parents: diff changeset	1718 // d) beg_bits: ... x \| 0 0 0 \| \|\| 0 x x ...
a61af66fc99e Initial load duke parents: diff changeset	1719 // end_bits: ... 1 \| 0 0 0 \| \|\| 0 x x ...
a61af66fc99e Initial load duke parents: diff changeset	1720 // +-----------+
a61af66fc99e Initial load duke parents: diff changeset	1721 // +-------+
a61af66fc99e Initial load duke parents: diff changeset	1722 // e) beg_bits: ... 0 0 \| 0 0 \| \|\| 0 x x ...
a61af66fc99e Initial load duke parents: diff changeset	1723 // end_bits: ... 0 0 \| 0 0 \| \|\| 0 x x ...
a61af66fc99e Initial load duke parents: diff changeset	1724 // +-------+
a61af66fc99e Initial load duke parents: diff changeset	1725
a61af66fc99e Initial load duke parents: diff changeset	1726 // 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	1727 size_t obj_len = CollectedHeap::min_fill_size();
0 a61af66fc99e Initial load duke parents: diff changeset	1728 HeapWord* obj_beg = dense_prefix_end - obj_len;
a61af66fc99e Initial load duke parents: diff changeset	1729
a61af66fc99e Initial load duke parents: diff changeset	1730 #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	1731 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	1732 // 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	1733 } else if (_mark_bitmap.is_obj_end(dense_prefix_bit - 2)) {
0 a61af66fc99e Initial load duke parents: diff changeset	1734 // Case b above.
a61af66fc99e Initial load duke parents: diff changeset	1735 obj_beg = dense_prefix_end - 1;
a61af66fc99e Initial load duke parents: diff changeset	1736 } else if (!_mark_bitmap.is_obj_end(dense_prefix_bit - 3) &&
a61af66fc99e Initial load duke parents: diff changeset	1737 _mark_bitmap.is_obj_end(dense_prefix_bit - 4)) {
a61af66fc99e Initial load duke parents: diff changeset	1738 // Case d above.
a61af66fc99e Initial load duke parents: diff changeset	1739 obj_beg = dense_prefix_end - 3;
a61af66fc99e Initial load duke parents: diff changeset	1740 obj_len = 3;
a61af66fc99e Initial load duke parents: diff changeset	1741 }
a61af66fc99e Initial load duke parents: diff changeset	1742 #endif // #ifdef _LP64
a61af66fc99e Initial load duke parents: diff changeset	1743
482 7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1744 CollectedHeap::fill_with_object(obj_beg, obj_len);
0 a61af66fc99e Initial load duke parents: diff changeset	1745 _mark_bitmap.mark_obj(obj_beg, obj_len);
a61af66fc99e Initial load duke parents: diff changeset	1746 _summary_data.add_obj(obj_beg, obj_len);
a61af66fc99e Initial load duke parents: diff changeset	1747 assert(start_array(id) != NULL, "sanity");
a61af66fc99e Initial load duke parents: diff changeset	1748 start_array(id)->allocate_block(obj_beg);
a61af66fc99e Initial load duke parents: diff changeset	1749 }
a61af66fc99e Initial load duke parents: diff changeset	1750 }
a61af66fc99e Initial load duke parents: diff changeset	1751
a61af66fc99e Initial load duke parents: diff changeset	1752 void
482 7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1753 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	1754 {
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1755 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	1756 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	1757 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	1758 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	1759 cur->set_source_region(0);
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1760 }
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1761 }
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1762
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1763 void
0 a61af66fc99e Initial load duke parents: diff changeset	1764 PSParallelCompact::summarize_space(SpaceId id, bool maximum_compaction)
a61af66fc99e Initial load duke parents: diff changeset	1765 {
a61af66fc99e Initial load duke parents: diff changeset	1766 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	1767 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	1768 ParallelOldGCSplitALot && id == old_space_id,
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1769 "should have been reset in summarize_spaces_quick()");
0 a61af66fc99e Initial load duke parents: diff changeset	1770
a61af66fc99e Initial load duke parents: diff changeset	1771 const MutableSpace* space = _space_info[id].space();
265 f88815ca1af1 6483129: par compact assertion failure (new_top > bottom) jcoomes parents: 264 diff changeset	1772 if (_space_info[id].new_top() != space->bottom()) {
f88815ca1af1 6483129: par compact assertion failure (new_top > bottom) jcoomes parents: 264 diff changeset	1773 HeapWord* dense_prefix_end = compute_dense_prefix(id, maximum_compaction);
f88815ca1af1 6483129: par compact assertion failure (new_top > bottom) jcoomes parents: 264 diff changeset	1774 _space_info[id].set_dense_prefix(dense_prefix_end);
0 a61af66fc99e Initial load duke parents: diff changeset	1775
a61af66fc99e Initial load duke parents: diff changeset	1776 #ifndef PRODUCT
265 f88815ca1af1 6483129: par compact assertion failure (new_top > bottom) jcoomes parents: 264 diff changeset	1777 if (TraceParallelOldGCDensePrefix) {
f88815ca1af1 6483129: par compact assertion failure (new_top > bottom) jcoomes parents: 264 diff changeset	1778 print_dense_prefix_stats("ratio", id, maximum_compaction,
f88815ca1af1 6483129: par compact assertion failure (new_top > bottom) jcoomes parents: 264 diff changeset	1779 dense_prefix_end);
f88815ca1af1 6483129: par compact assertion failure (new_top > bottom) jcoomes parents: 264 diff changeset	1780 HeapWord* addr = compute_dense_prefix_via_density(id, maximum_compaction);
f88815ca1af1 6483129: par compact assertion failure (new_top > bottom) jcoomes parents: 264 diff changeset	1781 print_dense_prefix_stats("density", id, maximum_compaction, addr);
f88815ca1af1 6483129: par compact assertion failure (new_top > bottom) jcoomes parents: 264 diff changeset	1782 }
0 a61af66fc99e Initial load duke parents: diff changeset	1783 #endif // #ifndef PRODUCT
a61af66fc99e Initial load duke parents: diff changeset	1784
483 0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1785 // 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	1786 // 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	1787 // compacts everything can be left in place.
265 f88815ca1af1 6483129: par compact assertion failure (new_top > bottom) jcoomes parents: 264 diff changeset	1788 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	1789 // 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	1790 // 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	1791 // 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	1792 // 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	1793 // 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	1794 fill_dense_prefix_end(id);
482 7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1795
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1796 // 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	1797 _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	1798 _summary_data.summarize(_space_info[id].split_info(),
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1799 dense_prefix_end, space->top(), NULL,
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1800 dense_prefix_end, space->end(),
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1801 _space_info[id].new_top_addr());
265 f88815ca1af1 6483129: par compact assertion failure (new_top > bottom) jcoomes parents: 264 diff changeset	1802 }
0 a61af66fc99e Initial load duke parents: diff changeset	1803 }
a61af66fc99e Initial load duke parents: diff changeset	1804
a61af66fc99e Initial load duke parents: diff changeset	1805 if (TraceParallelOldGCSummaryPhase) {
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1806 const size_t region_size = ParallelCompactData::RegionSize;
265 f88815ca1af1 6483129: par compact assertion failure (new_top > bottom) jcoomes parents: 264 diff changeset	1807 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	1808 const size_t dp_region = _summary_data.addr_to_region_idx(dense_prefix_end);
0 a61af66fc99e Initial load duke parents: diff changeset	1809 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	1810 HeapWord* const new_top = _space_info[id].new_top();
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1811 const HeapWord* nt_aligned_up = _summary_data.region_align_up(new_top);
0 a61af66fc99e Initial load duke parents: diff changeset	1812 const size_t cr_words = pointer_delta(nt_aligned_up, dense_prefix_end);
a61af66fc99e Initial load duke parents: diff changeset	1813 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	1814 "dp_region=" SIZE_FORMAT " " "dp_count=" SIZE_FORMAT " "
0 a61af66fc99e Initial load duke parents: diff changeset	1815 "cr_count=" SIZE_FORMAT " " "nt=" PTR_FORMAT,
a61af66fc99e Initial load duke parents: diff changeset	1816 id, space->capacity_in_words(), dense_prefix_end,
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1817 dp_region, dp_words / region_size,
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1818 cr_words / region_size, new_top);
0 a61af66fc99e Initial load duke parents: diff changeset	1819 }
a61af66fc99e Initial load duke parents: diff changeset	1820 }
a61af66fc99e Initial load duke parents: diff changeset	1821
482 7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1822 #ifndef PRODUCT
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1823 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	1824 HeapWord* dst_beg, HeapWord* dst_end,
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1825 SpaceId src_space_id,
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1826 HeapWord* src_beg, HeapWord* src_end)
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1827 {
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1828 if (TraceParallelOldGCSummaryPhase) {
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1829 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	1830 "src=" PTR_FORMAT "-" PTR_FORMAT " "
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1831 SIZE_FORMAT "-" SIZE_FORMAT " "
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1832 "dst=" PTR_FORMAT "-" PTR_FORMAT " "
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1833 SIZE_FORMAT "-" SIZE_FORMAT,
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1834 src_space_id, space_names[src_space_id],
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1835 dst_space_id, space_names[dst_space_id],
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1836 src_beg, src_end,
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1837 _summary_data.addr_to_region_idx(src_beg),
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1838 _summary_data.addr_to_region_idx(src_end),
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1839 dst_beg, dst_end,
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1840 _summary_data.addr_to_region_idx(dst_beg),
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1841 _summary_data.addr_to_region_idx(dst_end));
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1842 }
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1843 }
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1844 #endif // #ifndef PRODUCT
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1845
0 a61af66fc99e Initial load duke parents: diff changeset	1846 void PSParallelCompact::summary_phase(ParCompactionManager* cm,
a61af66fc99e Initial load duke parents: diff changeset	1847 bool maximum_compaction)
a61af66fc99e Initial load duke parents: diff changeset	1848 {
10405 f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10369 diff changeset	1849 GCTraceTime tm("summary phase", print_phases(), true, &_gc_timer);
0 a61af66fc99e Initial load duke parents: diff changeset	1850 // trace("2");
a61af66fc99e Initial load duke parents: diff changeset	1851
a61af66fc99e Initial load duke parents: diff changeset	1852 #ifdef ASSERT
a61af66fc99e Initial load duke parents: diff changeset	1853 if (TraceParallelOldGCMarkingPhase) {
a61af66fc99e Initial load duke parents: diff changeset	1854 tty->print_cr("add_obj_count=" SIZE_FORMAT " "
a61af66fc99e Initial load duke parents: diff changeset	1855 "add_obj_bytes=" SIZE_FORMAT,
a61af66fc99e Initial load duke parents: diff changeset	1856 add_obj_count, add_obj_size * HeapWordSize);
a61af66fc99e Initial load duke parents: diff changeset	1857 tty->print_cr("mark_bitmap_count=" SIZE_FORMAT " "
a61af66fc99e Initial load duke parents: diff changeset	1858 "mark_bitmap_bytes=" SIZE_FORMAT,
a61af66fc99e Initial load duke parents: diff changeset	1859 mark_bitmap_count, mark_bitmap_size * HeapWordSize);
a61af66fc99e Initial load duke parents: diff changeset	1860 }
a61af66fc99e Initial load duke parents: diff changeset	1861 #endif // #ifdef ASSERT
a61af66fc99e Initial load duke parents: diff changeset	1862
a61af66fc99e Initial load duke parents: diff changeset	1863 // Quick summarization of each space into itself, to see how much is live.
a61af66fc99e Initial load duke parents: diff changeset	1864 summarize_spaces_quick();
a61af66fc99e Initial load duke parents: diff changeset	1865
a61af66fc99e Initial load duke parents: diff changeset	1866 if (TraceParallelOldGCSummaryPhase) {
a61af66fc99e Initial load duke parents: diff changeset	1867 tty->print_cr("summary_phase: after summarizing each space to self");
a61af66fc99e Initial load duke parents: diff changeset	1868 Universe::print();
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1869 NOT_PRODUCT(print_region_ranges());
0 a61af66fc99e Initial load duke parents: diff changeset	1870 if (Verbose) {
a61af66fc99e Initial load duke parents: diff changeset	1871 NOT_PRODUCT(print_initial_summary_data(_summary_data, _space_info));
a61af66fc99e Initial load duke parents: diff changeset	1872 }
a61af66fc99e Initial load duke parents: diff changeset	1873 }
a61af66fc99e Initial load duke parents: diff changeset	1874
a61af66fc99e Initial load duke parents: diff changeset	1875 // The amount of live data that will end up in old space (assuming it fits).
a61af66fc99e Initial load duke parents: diff changeset	1876 size_t old_space_total_live = 0;
482 7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1877 for (unsigned int id = old_space_id; id < last_space_id; ++id) {
0 a61af66fc99e Initial load duke parents: diff changeset	1878 old_space_total_live += pointer_delta(_space_info[id].new_top(),
a61af66fc99e Initial load duke parents: diff changeset	1879 _space_info[id].space()->bottom());
a61af66fc99e Initial load duke parents: diff changeset	1880 }
a61af66fc99e Initial load duke parents: diff changeset	1881
482 7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1882 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	1883 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	1884 if (old_space_total_live > old_capacity) {
0 a61af66fc99e Initial load duke parents: diff changeset	1885 // XXX - should also try to expand
a61af66fc99e Initial load duke parents: diff changeset	1886 maximum_compaction = true;
a61af66fc99e Initial load duke parents: diff changeset	1887 }
483 0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1888 #ifndef PRODUCT
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1889 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	1890 provoke_split(maximum_compaction);
483 0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1891 }
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1892 #endif // #ifndef PRODUCT
0 a61af66fc99e Initial load duke parents: diff changeset	1893
6725 da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	1894 // Old generations.
0 a61af66fc99e Initial load duke parents: diff changeset	1895 summarize_space(old_space_id, maximum_compaction);
a61af66fc99e Initial load duke parents: diff changeset	1896
482 7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1897 // 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	1898 // 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	1899 // 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	1900 // target.
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1901 SpaceId dst_space_id = old_space_id;
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1902 HeapWord* dst_space_end = old_space->end();
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1903 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	1904 for (unsigned int id = eden_space_id; id < last_space_id; ++id) {
0 a61af66fc99e Initial load duke parents: diff changeset	1905 const MutableSpace* space = _space_info[id].space();
a61af66fc99e Initial load duke parents: diff changeset	1906 const size_t live = pointer_delta(_space_info[id].new_top(),
a61af66fc99e Initial load duke parents: diff changeset	1907 space->bottom());
482 7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1908 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	1909
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1910 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	1911 SpaceId(id), space->bottom(), space->top());)
266 2214b226b7f0 6724367: par compact could clear less young gen summary data jcoomes parents: 265 diff changeset	1912 if (live > 0 && live <= available) {
0 a61af66fc99e Initial load duke parents: diff changeset	1913 // All the live data will fit.
482 7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1914 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	1915 space->bottom(), space->top(),
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1916 NULL,
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1917 *new_top_addr, dst_space_end,
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1918 new_top_addr);
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1919 assert(done, "space must fit into old gen");
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1920
266 2214b226b7f0 6724367: par compact could clear less young gen summary data jcoomes parents: 265 diff changeset	1921 // Reset the new_top value for the space.
2214b226b7f0 6724367: par compact could clear less young gen summary data jcoomes parents: 265 diff changeset	1922 _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	1923 } else if (live > 0) {
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1924 // 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	1925 HeapWord* next_src_addr = NULL;
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1926 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	1927 space->bottom(), space->top(),
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1928 &next_src_addr,
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1929 *new_top_addr, dst_space_end,
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1930 new_top_addr);
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1931 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	1932 assert(next_src_addr != NULL, "sanity");
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1933
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1934 // 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	1935 // within the space itself.
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1936 dst_space_id = SpaceId(id);
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1937 dst_space_end = space->end();
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1938 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	1939 NOT_PRODUCT(summary_phase_msg(dst_space_id,
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1940 space->bottom(), dst_space_end,
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1941 SpaceId(id), next_src_addr, space->top());)
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1942 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	1943 next_src_addr, space->top(),
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1944 NULL,
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1945 space->bottom(), dst_space_end,
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1946 new_top_addr);
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1947 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	1948 assert(*new_top_addr <= space->top(), "usage should not grow");
0 a61af66fc99e Initial load duke parents: diff changeset	1949 }
a61af66fc99e Initial load duke parents: diff changeset	1950 }
a61af66fc99e Initial load duke parents: diff changeset	1951
a61af66fc99e Initial load duke parents: diff changeset	1952 if (TraceParallelOldGCSummaryPhase) {
a61af66fc99e Initial load duke parents: diff changeset	1953 tty->print_cr("summary_phase: after final summarization");
a61af66fc99e Initial load duke parents: diff changeset	1954 Universe::print();
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1955 NOT_PRODUCT(print_region_ranges());
0 a61af66fc99e Initial load duke parents: diff changeset	1956 if (Verbose) {
a61af66fc99e Initial load duke parents: diff changeset	1957 NOT_PRODUCT(print_generic_summary_data(_summary_data, _space_info));
a61af66fc99e Initial load duke parents: diff changeset	1958 }
a61af66fc99e Initial load duke parents: diff changeset	1959 }
a61af66fc99e Initial load duke parents: diff changeset	1960 }
a61af66fc99e Initial load duke parents: diff changeset	1961
a61af66fc99e Initial load duke parents: diff changeset	1962 // This method should contain all heap-specific policy for invoking a full
a61af66fc99e Initial load duke parents: diff changeset	1963 // collection. invoke_no_policy() will only attempt to compact the heap; it
a61af66fc99e Initial load duke parents: diff changeset	1964 // will do nothing further. If we need to bail out for policy reasons, scavenge
a61af66fc99e Initial load duke parents: diff changeset	1965 // before full gc, or any other specialized behavior, it needs to be added here.
a61af66fc99e Initial load duke parents: diff changeset	1966 //
a61af66fc99e Initial load duke parents: diff changeset	1967 // Note that this method should only be called from the vm_thread while at a
a61af66fc99e Initial load duke parents: diff changeset	1968 // safepoint.
1387 0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 1311 diff changeset	1969 //
0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 1311 diff changeset	1970 // 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	1971 // 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	1972 // 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	1973 // are being taken to free space.
0 a61af66fc99e Initial load duke parents: diff changeset	1974 void PSParallelCompact::invoke(bool maximum_heap_compaction) {
a61af66fc99e Initial load duke parents: diff changeset	1975 assert(SafepointSynchronize::is_at_safepoint(), "should be at safepoint");
a61af66fc99e Initial load duke parents: diff changeset	1976 assert(Thread::current() == (Thread*)VMThread::vm_thread(),
a61af66fc99e Initial load duke parents: diff changeset	1977 "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	1978
0 a61af66fc99e Initial load duke parents: diff changeset	1979 ParallelScavengeHeap* heap = gc_heap();
a61af66fc99e Initial load duke parents: diff changeset	1980 GCCause::Cause gc_cause = heap->gc_cause();
a61af66fc99e Initial load duke parents: diff changeset	1981 assert(!heap->is_gc_active(), "not reentrant");
a61af66fc99e Initial load duke parents: diff changeset	1982
a61af66fc99e Initial load duke parents: diff changeset	1983 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	1984 IsGCActiveMark mark;
0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 1311 diff changeset	1985
0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 1311 diff changeset	1986 if (ScavengeBeforeFullGC) {
0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 1311 diff changeset	1987 PSScavenge::invoke_no_policy();
0 a61af66fc99e Initial load duke parents: diff changeset	1988 }
1387 0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 1311 diff changeset	1989
0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 1311 diff changeset	1990 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	1991 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	1992
0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 1311 diff changeset	1993 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	1994 maximum_heap_compaction);
0 a61af66fc99e Initial load duke parents: diff changeset	1995 }
a61af66fc99e Initial load duke parents: diff changeset	1996
a61af66fc99e Initial load duke parents: diff changeset	1997 // This method contains no policy. You should probably
a61af66fc99e Initial load duke parents: diff changeset	1998 // be calling invoke() instead.
4913 ab4422d0ed59 7146343: PS invoke methods should indicate the type of gc done jcoomes parents: 4872 diff changeset	1999 bool PSParallelCompact::invoke_no_policy(bool maximum_heap_compaction) {
0 a61af66fc99e Initial load duke parents: diff changeset	2000 assert(SafepointSynchronize::is_at_safepoint(), "must be at a safepoint");
a61af66fc99e Initial load duke parents: diff changeset	2001 assert(ref_processor() != NULL, "Sanity");
a61af66fc99e Initial load duke parents: diff changeset	2002
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	2003 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	2004 return false;
0 a61af66fc99e Initial load duke parents: diff changeset	2005 }
a61af66fc99e Initial load duke parents: diff changeset	2006
10405 f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10369 diff changeset	2007 ParallelScavengeHeap* heap = gc_heap();
f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10369 diff changeset	2008
13400 86e6d691f2e1 8028128: Add a type safe alternative for working with counter based data mgronlun parents: 12351 diff changeset	2009 _gc_timer.register_gc_start();
10405 f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10369 diff changeset	2010 _gc_tracer.report_gc_start(heap->gc_cause(), _gc_timer.gc_start());
f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10369 diff changeset	2011
0 a61af66fc99e Initial load duke parents: diff changeset	2012 TimeStamp marking_start;
a61af66fc99e Initial load duke parents: diff changeset	2013 TimeStamp compaction_start;
a61af66fc99e Initial load duke parents: diff changeset	2014 TimeStamp collection_exit;
a61af66fc99e Initial load duke parents: diff changeset	2015
a61af66fc99e Initial load duke parents: diff changeset	2016 GCCause::Cause gc_cause = heap->gc_cause();
a61af66fc99e Initial load duke parents: diff changeset	2017 PSYoungGen* young_gen = heap->young_gen();
a61af66fc99e Initial load duke parents: diff changeset	2018 PSOldGen* old_gen = heap->old_gen();
a61af66fc99e Initial load duke parents: diff changeset	2019 PSAdaptiveSizePolicy* size_policy = heap->size_policy();
a61af66fc99e Initial load duke parents: diff changeset	2020
1387 0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 1311 diff changeset	2021 // 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	2022 // 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	2023 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	2024 heap->collector_policy());
0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 1311 diff changeset	2025
263 12eea04c8b06 6672698: mangle_unused_area() should not remangle the entire heap at each collection. jmasa parents: 210 diff changeset	2026 if (ZapUnusedHeapArea) {
12eea04c8b06 6672698: mangle_unused_area() should not remangle the entire heap at each collection. jmasa parents: 210 diff changeset	2027 // 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	2028 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	2029 }
12eea04c8b06 6672698: mangle_unused_area() should not remangle the entire heap at each collection. jmasa parents: 210 diff changeset	2030
10405 f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10369 diff changeset	2031 heap->pre_full_gc_dump(&_gc_timer);
615 c6c601a0f2d6 6797870: Add -XX:+{HeapDump,PrintClassHistogram}{Before,After}FullGC ysr parents: 546 diff changeset	2032
0 a61af66fc99e Initial load duke parents: diff changeset	2033 _print_phases = PrintGCDetails && PrintParallelOldGCPhaseTimes;
a61af66fc99e Initial load duke parents: diff changeset	2034
a61af66fc99e Initial load duke parents: diff changeset	2035 // Make sure data structures are sane, make the heap parsable, and do other
a61af66fc99e Initial load duke parents: diff changeset	2036 // miscellaneous bookkeeping.
a61af66fc99e Initial load duke parents: diff changeset	2037 PreGCValues pre_gc_values;
a61af66fc99e Initial load duke parents: diff changeset	2038 pre_compact(&pre_gc_values);
a61af66fc99e Initial load duke parents: diff changeset	2039
210 05712c37c828 6676016: ParallelOldGC leaks memory jcoomes parents: 142 diff changeset	2040 // Get the compaction manager reserved for the VM thread.
05712c37c828 6676016: ParallelOldGC leaks memory jcoomes parents: 142 diff changeset	2041 ParCompactionManager* const vmthread_cm =
05712c37c828 6676016: ParallelOldGC leaks memory jcoomes parents: 142 diff changeset	2042 ParCompactionManager::manager_array(gc_task_manager()->workers());
05712c37c828 6676016: ParallelOldGC leaks memory jcoomes parents: 142 diff changeset	2043
0 a61af66fc99e Initial load duke parents: diff changeset	2044 // Place after pre_compact() where the number of invocations is incremented.
a61af66fc99e Initial load duke parents: diff changeset	2045 AdaptiveSizePolicyOutput(size_policy, heap->total_collections());
a61af66fc99e Initial load duke parents: diff changeset	2046
a61af66fc99e Initial load duke parents: diff changeset	2047 {
a61af66fc99e Initial load duke parents: diff changeset	2048 ResourceMark rm;
a61af66fc99e Initial load duke parents: diff changeset	2049 HandleMark hm;
a61af66fc99e Initial load duke parents: diff changeset	2050
4095 bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 3979 diff changeset	2051 // 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	2052 gc_task_manager()->set_active_gang();
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 3979 diff changeset	2053 gc_task_manager()->task_idle_workers();
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 3979 diff changeset	2054 heap->set_par_threads(gc_task_manager()->active_workers());
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 3979 diff changeset	2055
0 a61af66fc99e Initial load duke parents: diff changeset	2056 gclog_or_tty->date_stamp(PrintGC && PrintGCDateStamps);
a61af66fc99e Initial load duke parents: diff changeset	2057 TraceCPUTime tcpu(PrintGCDetails, true, gclog_or_tty);
10405 f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10369 diff changeset	2058 GCTraceTime t1(GCCauseString("Full GC", gc_cause), PrintGC, !PrintGCDetails, NULL);
0 a61af66fc99e Initial load duke parents: diff changeset	2059 TraceCollectorStats tcs(counters());
3356 78542e2b5e35 7036199: Adding a notification to the implementation of GarbageCollectorMXBeans fparain parents: 3251 diff changeset	2060 TraceMemoryManagerStats tms(true /* Full GC */,gc_cause);
0 a61af66fc99e Initial load duke parents: diff changeset	2061
a61af66fc99e Initial load duke parents: diff changeset	2062 if (TraceGen1Time) accumulated_time()->start();
a61af66fc99e Initial load duke parents: diff changeset	2063
a61af66fc99e Initial load duke parents: diff changeset	2064 // Let the size policy know we're starting
a61af66fc99e Initial load duke parents: diff changeset	2065 size_policy->major_collection_begin();
a61af66fc99e Initial load duke parents: diff changeset	2066
a61af66fc99e Initial load duke parents: diff changeset	2067 CodeCache::gc_prologue();
a61af66fc99e Initial load duke parents: diff changeset	2068 Threads::gc_prologue();
a61af66fc99e Initial load duke parents: diff changeset	2069
a61af66fc99e Initial load duke parents: diff changeset	2070 COMPILER2_PRESENT(DerivedPointerTable::clear());
a61af66fc99e Initial load duke parents: diff changeset	2071
3979 4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3915 diff changeset	2072 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	2073 ref_processor()->setup_policy(maximum_heap_compaction);
0 a61af66fc99e Initial load duke parents: diff changeset	2074
a61af66fc99e Initial load duke parents: diff changeset	2075 bool marked_for_unloading = false;
a61af66fc99e Initial load duke parents: diff changeset	2076
a61af66fc99e Initial load duke parents: diff changeset	2077 marking_start.update();
10405 f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10369 diff changeset	2078 marking_phase(vmthread_cm, maximum_heap_compaction, &_gc_tracer);
0 a61af66fc99e Initial load duke parents: diff changeset	2079
6064 9d679effd28c 7166894: Add gc cause to GC logging for all collectors brutisso parents: 4913 diff changeset	2080 bool max_on_system_gc = UseMaximumCompactionOnSystemGC
9d679effd28c 7166894: Add gc cause to GC logging for all collectors brutisso parents: 4913 diff changeset	2081 && gc_cause == GCCause::_java_lang_system_gc;
210 05712c37c828 6676016: ParallelOldGC leaks memory jcoomes parents: 142 diff changeset	2082 summary_phase(vmthread_cm, maximum_heap_compaction \|\| max_on_system_gc);
0 a61af66fc99e Initial load duke parents: diff changeset	2083
a61af66fc99e Initial load duke parents: diff changeset	2084 COMPILER2_PRESENT(assert(DerivedPointerTable::is_active(), "Sanity"));
a61af66fc99e Initial load duke parents: diff changeset	2085 COMPILER2_PRESENT(DerivedPointerTable::set_active(false));
a61af66fc99e Initial load duke parents: diff changeset	2086
a61af66fc99e Initial load duke parents: diff changeset	2087 // adjust_roots() updates Universe::_intArrayKlassObj which is
a61af66fc99e Initial load duke parents: diff changeset	2088 // needed by the compaction for filling holes in the dense prefix.
a61af66fc99e Initial load duke parents: diff changeset	2089 adjust_roots();
a61af66fc99e Initial load duke parents: diff changeset	2090
a61af66fc99e Initial load duke parents: diff changeset	2091 compaction_start.update();
3251 eda9eb483d29 6841742: par compact - remove unused/unsupported options jcoomes parents: 2369 diff changeset	2092 compact();
0 a61af66fc99e Initial load duke parents: diff changeset	2093
a61af66fc99e Initial load duke parents: diff changeset	2094 // Reset the mark bitmap, summary data, and do other bookkeeping. Must be
a61af66fc99e Initial load duke parents: diff changeset	2095 // done before resizing.
a61af66fc99e Initial load duke parents: diff changeset	2096 post_compact();
a61af66fc99e Initial load duke parents: diff changeset	2097
a61af66fc99e Initial load duke parents: diff changeset	2098 // Let the size policy know we're done
a61af66fc99e Initial load duke parents: diff changeset	2099 size_policy->major_collection_end(old_gen->used_in_bytes(), gc_cause);
a61af66fc99e Initial load duke parents: diff changeset	2100
a61af66fc99e Initial load duke parents: diff changeset	2101 if (UseAdaptiveSizePolicy) {
a61af66fc99e Initial load duke parents: diff changeset	2102 if (PrintAdaptiveSizePolicy) {
a61af66fc99e Initial load duke parents: diff changeset	2103 gclog_or_tty->print("AdaptiveSizeStart: ");
a61af66fc99e Initial load duke parents: diff changeset	2104 gclog_or_tty->stamp();
a61af66fc99e Initial load duke parents: diff changeset	2105 gclog_or_tty->print_cr(" collection: %d ",
a61af66fc99e Initial load duke parents: diff changeset	2106 heap->total_collections());
a61af66fc99e Initial load duke parents: diff changeset	2107 if (Verbose) {
6725 da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	2108 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	2109 old_gen->capacity_in_bytes(), young_gen->capacity_in_bytes());
0 a61af66fc99e Initial load duke parents: diff changeset	2110 }
a61af66fc99e Initial load duke parents: diff changeset	2111 }
a61af66fc99e Initial load duke parents: diff changeset	2112
a61af66fc99e Initial load duke parents: diff changeset	2113 // Don't check if the size_policy is ready here. Let
a61af66fc99e Initial load duke parents: diff changeset	2114 // the size_policy check that internally.
a61af66fc99e Initial load duke parents: diff changeset	2115 if (UseAdaptiveGenerationSizePolicyAtMajorCollection &&
a61af66fc99e Initial load duke parents: diff changeset	2116 ((gc_cause != GCCause::_java_lang_system_gc) \|\|
a61af66fc99e Initial load duke parents: diff changeset	2117 UseAdaptiveSizePolicyWithSystemGC)) {
a61af66fc99e Initial load duke parents: diff changeset	2118 // Calculate optimal free space amounts
a61af66fc99e Initial load duke parents: diff changeset	2119 assert(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(),
a61af66fc99e Initial load duke parents: diff changeset	2122 "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	2123
eba99d16dc6f 8007763: Refactoring: split up compute_generation_free_space() into two functions for class PSAdaptiveSizePolicy tamao parents: 10285 diff changeset	2124 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	2125 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	2126 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	2127 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	2128 size_t max_old_gen_size = old_gen->max_gen_size();
0 a61af66fc99e Initial load duke parents: diff changeset	2129 size_t max_eden_size = young_gen->max_size() -
a61af66fc99e Initial load duke parents: diff changeset	2130 young_gen->from_space()->capacity_in_bytes() -
a61af66fc99e Initial load duke parents: diff changeset	2131 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	2132
eba99d16dc6f 8007763: Refactoring: split up compute_generation_free_space() into two functions for class PSAdaptiveSizePolicy tamao parents: 10285 diff changeset	2133 // Used for diagnostics
eba99d16dc6f 8007763: Refactoring: split up compute_generation_free_space() into two functions for class PSAdaptiveSizePolicy tamao parents: 10285 diff changeset	2134 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	2135
10359 14d3f71f831d 8007762: Rename a bunch of methods in size policy across collectors tamao parents: 10329 diff changeset	2136 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	2137 eden_live,
14d3f71f831d 8007762: Rename a bunch of methods in size policy across collectors tamao parents: 10329 diff changeset	2138 old_live,
14d3f71f831d 8007762: Rename a bunch of methods in size policy across collectors tamao parents: 10329 diff changeset	2139 cur_eden,
14d3f71f831d 8007762: Rename a bunch of methods in size policy across collectors tamao parents: 10329 diff changeset	2140 max_old_gen_size,
14d3f71f831d 8007762: Rename a bunch of methods in size policy across collectors tamao parents: 10329 diff changeset	2141 max_eden_size,
14d3f71f831d 8007762: Rename a bunch of methods in size policy across collectors tamao parents: 10329 diff changeset	2142 true /* full gc*/);
10288 eba99d16dc6f 8007763: Refactoring: split up compute_generation_free_space() into two functions for class PSAdaptiveSizePolicy tamao parents: 10285 diff changeset	2143
eba99d16dc6f 8007763: Refactoring: split up compute_generation_free_space() into two functions for class PSAdaptiveSizePolicy tamao parents: 10285 diff changeset	2144 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	2145 eden_live,
eba99d16dc6f 8007763: Refactoring: split up compute_generation_free_space() into two functions for class PSAdaptiveSizePolicy tamao parents: 10285 diff changeset	2146 max_old_gen_size,
eba99d16dc6f 8007763: Refactoring: split up compute_generation_free_space() into two functions for class PSAdaptiveSizePolicy tamao parents: 10285 diff changeset	2147 max_eden_size,
eba99d16dc6f 8007763: Refactoring: split up compute_generation_free_space() into two functions for class PSAdaptiveSizePolicy tamao parents: 10285 diff changeset	2148 true /* full gc*/,
eba99d16dc6f 8007763: Refactoring: split up compute_generation_free_space() into two functions for class PSAdaptiveSizePolicy tamao parents: 10285 diff changeset	2149 gc_cause,
eba99d16dc6f 8007763: Refactoring: split up compute_generation_free_space() into two functions for class PSAdaptiveSizePolicy tamao parents: 10285 diff changeset	2150 heap->collector_policy());
eba99d16dc6f 8007763: Refactoring: split up compute_generation_free_space() into two functions for class PSAdaptiveSizePolicy tamao parents: 10285 diff changeset	2151
eba99d16dc6f 8007763: Refactoring: split up compute_generation_free_space() into two functions for class PSAdaptiveSizePolicy tamao parents: 10285 diff changeset	2152 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	2153
12eea04c8b06 6672698: mangle_unused_area() should not remangle the entire heap at each collection. jmasa parents: 210 diff changeset	2154 heap->resize_old_gen(
12eea04c8b06 6672698: mangle_unused_area() should not remangle the entire heap at each collection. jmasa parents: 210 diff changeset	2155 size_policy->calculated_old_free_size_in_bytes());
0 a61af66fc99e Initial load duke parents: diff changeset	2156
a61af66fc99e Initial load duke parents: diff changeset	2157 // Don't resize the young generation at an major collection. A
a61af66fc99e Initial load duke parents: diff changeset	2158 // desired young generation size may have been calculated but
a61af66fc99e Initial load duke parents: diff changeset	2159 // resizing the young generation complicates the code because the
a61af66fc99e Initial load duke parents: diff changeset	2160 // resizing of the old generation may have moved the boundary
a61af66fc99e Initial load duke parents: diff changeset	2161 // between the young generation and the old generation. Let the
a61af66fc99e Initial load duke parents: diff changeset	2162 // young generation resizing happen at the minor collections.
a61af66fc99e Initial load duke parents: diff changeset	2163 }
a61af66fc99e Initial load duke parents: diff changeset	2164 if (PrintAdaptiveSizePolicy) {
a61af66fc99e Initial load duke parents: diff changeset	2165 gclog_or_tty->print_cr("AdaptiveSizeStop: collection: %d ",
a61af66fc99e Initial load duke parents: diff changeset	2166 heap->total_collections());
a61af66fc99e Initial load duke parents: diff changeset	2167 }
a61af66fc99e Initial load duke parents: diff changeset	2168 }
a61af66fc99e Initial load duke parents: diff changeset	2169
a61af66fc99e Initial load duke parents: diff changeset	2170 if (UsePerfData) {
a61af66fc99e Initial load duke parents: diff changeset	2171 PSGCAdaptivePolicyCounters* const counters = heap->gc_policy_counters();
a61af66fc99e Initial load duke parents: diff changeset	2172 counters->update_counters();
a61af66fc99e Initial load duke parents: diff changeset	2173 counters->update_old_capacity(old_gen->capacity_in_bytes());
a61af66fc99e Initial load duke parents: diff changeset	2174 counters->update_young_capacity(young_gen->capacity_in_bytes());
a61af66fc99e Initial load duke parents: diff changeset	2175 }
a61af66fc99e Initial load duke parents: diff changeset	2176
a61af66fc99e Initial load duke parents: diff changeset	2177 heap->resize_all_tlabs();
a61af66fc99e Initial load duke parents: diff changeset	2178
14309 63a4eb8bcd23 8025856: Fix typos in the GC code jwilhelm parents: 14210 diff changeset	2179 // Resize the metaspace capacity after a collection
6725 da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	2180 MetaspaceGC::compute_new_size();
0 a61af66fc99e Initial load duke parents: diff changeset	2181
a61af66fc99e Initial load duke parents: diff changeset	2182 if (TraceGen1Time) accumulated_time()->stop();
a61af66fc99e Initial load duke parents: diff changeset	2183
a61af66fc99e Initial load duke parents: diff changeset	2184 if (PrintGC) {
a61af66fc99e Initial load duke parents: diff changeset	2185 if (PrintGCDetails) {
a61af66fc99e Initial load duke parents: diff changeset	2186 // No GC timestamp here. This is after GC so it would be confusing.
a61af66fc99e Initial load duke parents: diff changeset	2187 young_gen->print_used_change(pre_gc_values.young_gen_used());
a61af66fc99e Initial load duke parents: diff changeset	2188 old_gen->print_used_change(pre_gc_values.old_gen_used());
a61af66fc99e Initial load duke parents: diff changeset	2189 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	2190 MetaspaceAux::print_metaspace_change(pre_gc_values.metadata_used());
0 a61af66fc99e Initial load duke parents: diff changeset	2191 } else {
a61af66fc99e Initial load duke parents: diff changeset	2192 heap->print_heap_change(pre_gc_values.heap_used());
a61af66fc99e Initial load duke parents: diff changeset	2193 }
a61af66fc99e Initial load duke parents: diff changeset	2194 }
a61af66fc99e Initial load duke parents: diff changeset	2195
a61af66fc99e Initial load duke parents: diff changeset	2196 // Track memory usage and detect low memory
a61af66fc99e Initial load duke parents: diff changeset	2197 MemoryService::track_memory_usage();
a61af66fc99e Initial load duke parents: diff changeset	2198 heap->update_counters();
4095 bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 3979 diff changeset	2199 gc_task_manager()->release_idle_workers();
0 a61af66fc99e Initial load duke parents: diff changeset	2200 }
a61af66fc99e Initial load duke parents: diff changeset	2201
1836 894b1d7c7e01 6423256: GC stacks should use a better data structure jcoomes parents: 1833 diff changeset	2202 #ifdef ASSERT
894b1d7c7e01 6423256: GC stacks should use a better data structure jcoomes parents: 1833 diff changeset	2203 for (size_t i = 0; i < ParallelGCThreads + 1; ++i) {
894b1d7c7e01 6423256: GC stacks should use a better data structure jcoomes parents: 1833 diff changeset	2204 ParCompactionManager* const cm =
894b1d7c7e01 6423256: GC stacks should use a better data structure jcoomes parents: 1833 diff changeset	2205 ParCompactionManager::manager_array(int(i));
894b1d7c7e01 6423256: GC stacks should use a better data structure jcoomes parents: 1833 diff changeset	2206 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	2207 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	2208 }
894b1d7c7e01 6423256: GC stacks should use a better data structure jcoomes parents: 1833 diff changeset	2209 #endif // ASSERT
894b1d7c7e01 6423256: GC stacks should use a better data structure jcoomes parents: 1833 diff changeset	2210
0 a61af66fc99e Initial load duke parents: diff changeset	2211 if (VerifyAfterGC && heap->total_collections() >= VerifyGCStartAt) {
a61af66fc99e Initial load duke parents: diff changeset	2212 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	2213 Universe::verify(" VerifyAfterGC:");
0 a61af66fc99e Initial load duke parents: diff changeset	2214 }
a61af66fc99e Initial load duke parents: diff changeset	2215
a61af66fc99e Initial load duke parents: diff changeset	2216 // Re-verify object start arrays
a61af66fc99e Initial load duke parents: diff changeset	2217 if (VerifyObjectStartArray &&
a61af66fc99e Initial load duke parents: diff changeset	2218 VerifyAfterGC) {
a61af66fc99e Initial load duke parents: diff changeset	2219 old_gen->verify_object_start_array();
a61af66fc99e Initial load duke parents: diff changeset	2220 }
a61af66fc99e Initial load duke parents: diff changeset	2221
263 12eea04c8b06 6672698: mangle_unused_area() should not remangle the entire heap at each collection. jmasa parents: 210 diff changeset	2222 if (ZapUnusedHeapArea) {
12eea04c8b06 6672698: mangle_unused_area() should not remangle the entire heap at each collection. jmasa parents: 210 diff changeset	2223 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	2224 }
12eea04c8b06 6672698: mangle_unused_area() should not remangle the entire heap at each collection. jmasa parents: 210 diff changeset	2225
0 a61af66fc99e Initial load duke parents: diff changeset	2226 NOT_PRODUCT(ref_processor()->verify_no_references_recorded());
a61af66fc99e Initial load duke parents: diff changeset	2227
a61af66fc99e Initial load duke parents: diff changeset	2228 collection_exit.update();
a61af66fc99e Initial load duke parents: diff changeset	2229
4872 aa3d708d67c4 7141200: log some interesting information in ring buffers for crashes never parents: 4712 diff changeset	2230 heap->print_heap_after_gc();
10405 f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10369 diff changeset	2231 heap->trace_heap_after_gc(&_gc_tracer);
f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10369 diff changeset	2232
0 a61af66fc99e Initial load duke parents: diff changeset	2233 if (PrintGCTaskTimeStamps) {
a61af66fc99e Initial load duke parents: diff changeset	2234 gclog_or_tty->print_cr("VM-Thread " INT64_FORMAT " " INT64_FORMAT " "
a61af66fc99e Initial load duke parents: diff changeset	2235 INT64_FORMAT,
a61af66fc99e Initial load duke parents: diff changeset	2236 marking_start.ticks(), compaction_start.ticks(),
a61af66fc99e Initial load duke parents: diff changeset	2237 collection_exit.ticks());
a61af66fc99e Initial load duke parents: diff changeset	2238 gc_task_manager()->print_task_time_stamps();
a61af66fc99e Initial load duke parents: diff changeset	2239 }
546 05c6d52fa7a9 6690928: Use spinning in combination with yields for workstealing termination. jmasa parents: 496 diff changeset	2240
10405 f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10369 diff changeset	2241 heap->post_full_gc_dump(&_gc_timer);
615 c6c601a0f2d6 6797870: Add -XX:+{HeapDump,PrintClassHistogram}{Before,After}FullGC ysr parents: 546 diff changeset	2242
546 05c6d52fa7a9 6690928: Use spinning in combination with yields for workstealing termination. jmasa parents: 496 diff changeset	2243 #ifdef TRACESPINNING
05c6d52fa7a9 6690928: Use spinning in combination with yields for workstealing termination. jmasa parents: 496 diff changeset	2244 ParallelTaskTerminator::print_termination_counts();
05c6d52fa7a9 6690928: Use spinning in combination with yields for workstealing termination. jmasa parents: 496 diff changeset	2245 #endif
4913 ab4422d0ed59 7146343: PS invoke methods should indicate the type of gc done jcoomes parents: 4872 diff changeset	2246
13400 86e6d691f2e1 8028128: Add a type safe alternative for working with counter based data mgronlun parents: 12351 diff changeset	2247 _gc_timer.register_gc_end();
10405 f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10369 diff changeset	2248
f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10369 diff changeset	2249 _gc_tracer.report_dense_prefix(dense_prefix(old_space_id));
f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10369 diff changeset	2250 _gc_tracer.report_gc_end(_gc_timer.gc_end(), _gc_timer.time_partitions());
f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10369 diff changeset	2251
4913 ab4422d0ed59 7146343: PS invoke methods should indicate the type of gc done jcoomes parents: 4872 diff changeset	2252 return true;
0 a61af66fc99e Initial load duke parents: diff changeset	2253 }
a61af66fc99e Initial load duke parents: diff changeset	2254
a61af66fc99e Initial load duke parents: diff changeset	2255 bool PSParallelCompact::absorb_live_data_from_eden(PSAdaptiveSizePolicy* size_policy,
a61af66fc99e Initial load duke parents: diff changeset	2256 PSYoungGen* young_gen,
a61af66fc99e Initial load duke parents: diff changeset	2257 PSOldGen* old_gen) {
a61af66fc99e Initial load duke parents: diff changeset	2258 MutableSpace* const eden_space = young_gen->eden_space();
a61af66fc99e Initial load duke parents: diff changeset	2259 assert(!eden_space->is_empty(), "eden must be non-empty");
a61af66fc99e Initial load duke parents: diff changeset	2260 assert(young_gen->virtual_space()->alignment() ==
a61af66fc99e Initial load duke parents: diff changeset	2261 old_gen->virtual_space()->alignment(), "alignments do not match");
a61af66fc99e Initial load duke parents: diff changeset	2262
a61af66fc99e Initial load duke parents: diff changeset	2263 if (!(UseAdaptiveSizePolicy && UseAdaptiveGCBoundary)) {
a61af66fc99e Initial load duke parents: diff changeset	2264 return false;
a61af66fc99e Initial load duke parents: diff changeset	2265 }
a61af66fc99e Initial load duke parents: diff changeset	2266
a61af66fc99e Initial load duke parents: diff changeset	2267 // Both generations must be completely committed.
a61af66fc99e Initial load duke parents: diff changeset	2268 if (young_gen->virtual_space()->uncommitted_size() != 0) {
a61af66fc99e Initial load duke parents: diff changeset	2269 return false;
a61af66fc99e Initial load duke parents: diff changeset	2270 }
a61af66fc99e Initial load duke parents: diff changeset	2271 if (old_gen->virtual_space()->uncommitted_size() != 0) {
a61af66fc99e Initial load duke parents: diff changeset	2272 return false;
a61af66fc99e Initial load duke parents: diff changeset	2273 }
a61af66fc99e Initial load duke parents: diff changeset	2274
a61af66fc99e Initial load duke parents: diff changeset	2275 // Figure out how much to take from eden. Include the average amount promoted
a61af66fc99e Initial load duke parents: diff changeset	2276 // in the total; otherwise the next young gen GC will simply bail out to a
a61af66fc99e Initial load duke parents: diff changeset	2277 // full GC.
a61af66fc99e Initial load duke parents: diff changeset	2278 const size_t alignment = old_gen->virtual_space()->alignment();
a61af66fc99e Initial load duke parents: diff changeset	2279 const size_t eden_used = eden_space->used_in_bytes();
a61af66fc99e Initial load duke parents: diff changeset	2280 const size_t promoted = (size_t)size_policy->avg_promoted()->padded_average();
a61af66fc99e Initial load duke parents: diff changeset	2281 const size_t absorb_size = align_size_up(eden_used + promoted, alignment);
a61af66fc99e Initial load duke parents: diff changeset	2282 const size_t eden_capacity = eden_space->capacity_in_bytes();
a61af66fc99e Initial load duke parents: diff changeset	2283
a61af66fc99e Initial load duke parents: diff changeset	2284 if (absorb_size >= eden_capacity) {
a61af66fc99e Initial load duke parents: diff changeset	2285 return false; // Must leave some space in eden.
a61af66fc99e Initial load duke parents: diff changeset	2286 }
a61af66fc99e Initial load duke parents: diff changeset	2287
a61af66fc99e Initial load duke parents: diff changeset	2288 const size_t new_young_size = young_gen->capacity_in_bytes() - absorb_size;
a61af66fc99e Initial load duke parents: diff changeset	2289 if (new_young_size < young_gen->min_gen_size()) {
a61af66fc99e Initial load duke parents: diff changeset	2290 return false; // Respect young gen minimum size.
a61af66fc99e Initial load duke parents: diff changeset	2291 }
a61af66fc99e Initial load duke parents: diff changeset	2292
a61af66fc99e Initial load duke parents: diff changeset	2293 if (TraceAdaptiveGCBoundary && Verbose) {
a61af66fc99e Initial load duke parents: diff changeset	2294 gclog_or_tty->print(" absorbing " SIZE_FORMAT "K: "
a61af66fc99e Initial load duke parents: diff changeset	2295 "eden " SIZE_FORMAT "K->" SIZE_FORMAT "K "
a61af66fc99e Initial load duke parents: diff changeset	2296 "from " SIZE_FORMAT "K, to " SIZE_FORMAT "K "
a61af66fc99e Initial load duke parents: diff changeset	2297 "young_gen " SIZE_FORMAT "K->" SIZE_FORMAT "K ",
a61af66fc99e Initial load duke parents: diff changeset	2298 absorb_size / K,
a61af66fc99e Initial load duke parents: diff changeset	2299 eden_capacity / K, (eden_capacity - absorb_size) / K,
a61af66fc99e Initial load duke parents: diff changeset	2300 young_gen->from_space()->used_in_bytes() / K,
a61af66fc99e Initial load duke parents: diff changeset	2301 young_gen->to_space()->used_in_bytes() / K,
a61af66fc99e Initial load duke parents: diff changeset	2302 young_gen->capacity_in_bytes() / K, new_young_size / K);
a61af66fc99e Initial load duke parents: diff changeset	2303 }
a61af66fc99e Initial load duke parents: diff changeset	2304
a61af66fc99e Initial load duke parents: diff changeset	2305 // Fill the unused part of the old gen.
a61af66fc99e Initial load duke parents: diff changeset	2306 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	2307 HeapWord* const unused_start = old_space->top();
7d7a7c599c17 6578152: fill_region_with_object has usability and safety issues jcoomes parents: 457 diff changeset	2308 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	2309
7d7a7c599c17 6578152: fill_region_with_object has usability and safety issues jcoomes parents: 457 diff changeset	2310 if (unused_words > 0) {
7d7a7c599c17 6578152: fill_region_with_object has usability and safety issues jcoomes parents: 457 diff changeset	2311 if (unused_words < CollectedHeap::min_fill_size()) {
7d7a7c599c17 6578152: fill_region_with_object has usability and safety issues jcoomes parents: 457 diff changeset	2312 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	2313 }
7d7a7c599c17 6578152: fill_region_with_object has usability and safety issues jcoomes parents: 457 diff changeset	2314 CollectedHeap::fill_with_objects(unused_start, unused_words);
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 // Take the live data from eden and set both top and end in the old gen to
a61af66fc99e Initial load duke parents: diff changeset	2318 // eden top. (Need to set end because reset_after_change() mangles the region
a61af66fc99e Initial load duke parents: diff changeset	2319 // from end to virtual_space->high() in debug builds).
a61af66fc99e Initial load duke parents: diff changeset	2320 HeapWord* const new_top = eden_space->top();
a61af66fc99e Initial load duke parents: diff changeset	2321 old_gen->virtual_space()->expand_into(young_gen->virtual_space(),
a61af66fc99e Initial load duke parents: diff changeset	2322 absorb_size);
a61af66fc99e Initial load duke parents: diff changeset	2323 young_gen->reset_after_change();
a61af66fc99e Initial load duke parents: diff changeset	2324 old_space->set_top(new_top);
a61af66fc99e Initial load duke parents: diff changeset	2325 old_space->set_end(new_top);
a61af66fc99e Initial load duke parents: diff changeset	2326 old_gen->reset_after_change();
a61af66fc99e Initial load duke parents: diff changeset	2327
a61af66fc99e Initial load duke parents: diff changeset	2328 // Update the object start array for the filler object and the data from eden.
a61af66fc99e Initial load duke parents: diff changeset	2329 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	2330 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	2331 start_array->allocate_block(p);
0 a61af66fc99e Initial load duke parents: diff changeset	2332 }
a61af66fc99e Initial load duke parents: diff changeset	2333
a61af66fc99e Initial load duke parents: diff changeset	2334 // Could update the promoted average here, but it is not typically updated at
a61af66fc99e Initial load duke parents: diff changeset	2335 // full GCs and the value to use is unclear. Something like
a61af66fc99e Initial load duke parents: diff changeset	2336 //
a61af66fc99e Initial load duke parents: diff changeset	2337 // cur_promoted_avg + absorb_size / number_of_scavenges_since_last_full_gc.
a61af66fc99e Initial load duke parents: diff changeset	2338
a61af66fc99e Initial load duke parents: diff changeset	2339 size_policy->set_bytes_absorbed_from_eden(absorb_size);
a61af66fc99e Initial load duke parents: diff changeset	2340 return true;
a61af66fc99e Initial load duke parents: diff changeset	2341 }
a61af66fc99e Initial load duke parents: diff changeset	2342
a61af66fc99e Initial load duke parents: diff changeset	2343 GCTaskManager* const PSParallelCompact::gc_task_manager() {
a61af66fc99e Initial load duke parents: diff changeset	2344 assert(ParallelScavengeHeap::gc_task_manager() != NULL,
a61af66fc99e Initial load duke parents: diff changeset	2345 "shouldn't return NULL");
a61af66fc99e Initial load duke parents: diff changeset	2346 return ParallelScavengeHeap::gc_task_manager();
a61af66fc99e Initial load duke parents: diff changeset	2347 }
a61af66fc99e Initial load duke parents: diff changeset	2348
a61af66fc99e Initial load duke parents: diff changeset	2349 void PSParallelCompact::marking_phase(ParCompactionManager* cm,
10405 f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10369 diff changeset	2350 bool maximum_heap_compaction,
f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10369 diff changeset	2351 ParallelOldTracer *gc_tracer) {
0 a61af66fc99e Initial load duke parents: diff changeset	2352 // Recursively traverse all live objects and mark them
10405 f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10369 diff changeset	2353 GCTraceTime tm("marking phase", print_phases(), true, &_gc_timer);
0 a61af66fc99e Initial load duke parents: diff changeset	2354
a61af66fc99e Initial load duke parents: diff changeset	2355 ParallelScavengeHeap* heap = gc_heap();
a61af66fc99e Initial load duke parents: diff changeset	2356 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	2357 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	2358 TaskQueueSetSuper* qset = ParCompactionManager::region_array();
4095 bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 3979 diff changeset	2359 ParallelTaskTerminator terminator(active_gc_threads, qset);
0 a61af66fc99e Initial load duke parents: diff changeset	2360
a61af66fc99e Initial load duke parents: diff changeset	2361 PSParallelCompact::MarkAndPushClosure mark_and_push_closure(cm);
a61af66fc99e Initial load duke parents: diff changeset	2362 PSParallelCompact::FollowStackClosure follow_stack_closure(cm);
a61af66fc99e Initial load duke parents: diff changeset	2363
6725 da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	2364 // Need new claim bits before marking starts.
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	2365 ClassLoaderDataGraph::clear_claimed_marks();
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	2366
0 a61af66fc99e Initial load duke parents: diff changeset	2367 {
10405 f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10369 diff changeset	2368 GCTraceTime tm_m("par mark", print_phases(), true, &_gc_timer);
f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10369 diff changeset	2369
989 148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 696 diff changeset	2370 ParallelScavengeHeap::ParStrongRootsScope psrs;
0 a61af66fc99e Initial load duke parents: diff changeset	2371
a61af66fc99e Initial load duke parents: diff changeset	2372 GCTaskQueue* q = GCTaskQueue::create();
a61af66fc99e Initial load duke parents: diff changeset	2373
a61af66fc99e Initial load duke parents: diff changeset	2374 q->enqueue(new MarkFromRootsTask(MarkFromRootsTask::universe));
a61af66fc99e Initial load duke parents: diff changeset	2375 q->enqueue(new MarkFromRootsTask(MarkFromRootsTask::jni_handles));
a61af66fc99e Initial load duke parents: diff changeset	2376 // We scan the thread roots in parallel
a61af66fc99e Initial load duke parents: diff changeset	2377 Threads::create_thread_roots_marking_tasks(q);
a61af66fc99e Initial load duke parents: diff changeset	2378 q->enqueue(new MarkFromRootsTask(MarkFromRootsTask::object_synchronizer));
a61af66fc99e Initial load duke parents: diff changeset	2379 q->enqueue(new MarkFromRootsTask(MarkFromRootsTask::flat_profiler));
a61af66fc99e Initial load duke parents: diff changeset	2380 q->enqueue(new MarkFromRootsTask(MarkFromRootsTask::management));
a61af66fc99e Initial load duke parents: diff changeset	2381 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	2382 q->enqueue(new MarkFromRootsTask(MarkFromRootsTask::class_loader_data));
0 a61af66fc99e Initial load duke parents: diff changeset	2383 q->enqueue(new MarkFromRootsTask(MarkFromRootsTask::jvmti));
989 148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 696 diff changeset	2384 q->enqueue(new MarkFromRootsTask(MarkFromRootsTask::code_cache));
0 a61af66fc99e Initial load duke parents: diff changeset	2385
4095 bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 3979 diff changeset	2386 if (active_gc_threads > 1) {
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 3979 diff changeset	2387 for (uint j = 0; j < active_gc_threads; j++) {
0 a61af66fc99e Initial load duke parents: diff changeset	2388 q->enqueue(new StealMarkingTask(&terminator));
a61af66fc99e Initial load duke parents: diff changeset	2389 }
a61af66fc99e Initial load duke parents: diff changeset	2390 }
a61af66fc99e Initial load duke parents: diff changeset	2391
4095 bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 3979 diff changeset	2392 gc_task_manager()->execute_and_wait(q);
0 a61af66fc99e Initial load duke parents: diff changeset	2393 }
a61af66fc99e Initial load duke parents: diff changeset	2394
a61af66fc99e Initial load duke parents: diff changeset	2395 // Process reference objects found during marking
a61af66fc99e Initial load duke parents: diff changeset	2396 {
10405 f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10369 diff changeset	2397 GCTraceTime tm_r("reference processing", print_phases(), true, &_gc_timer);
f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10369 diff changeset	2398
f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10369 diff changeset	2399 ReferenceProcessorStats stats;
0 a61af66fc99e Initial load duke parents: diff changeset	2400 if (ref_processor()->processing_is_mt()) {
a61af66fc99e Initial load duke parents: diff changeset	2401 RefProcTaskExecutor task_executor;
10405 f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10369 diff changeset	2402 stats = ref_processor()->process_discovered_references(
453 c96030fff130 6684579: SoftReference processing can be made more efficient ysr parents: 376 diff changeset	2403 is_alive_closure(), &mark_and_push_closure, &follow_stack_closure,
10405 f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10369 diff changeset	2404 &task_executor, &_gc_timer);
0 a61af66fc99e Initial load duke parents: diff changeset	2405 } else {
10405 f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10369 diff changeset	2406 stats = ref_processor()->process_discovered_references(
f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10369 diff changeset	2407 is_alive_closure(), &mark_and_push_closure, &follow_stack_closure, NULL,
f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10369 diff changeset	2408 &_gc_timer);
0 a61af66fc99e Initial load duke parents: diff changeset	2409 }
10405 f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10369 diff changeset	2410
f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10369 diff changeset	2411 gc_tracer->report_gc_reference_stats(stats);
0 a61af66fc99e Initial load duke parents: diff changeset	2412 }
a61af66fc99e Initial load duke parents: diff changeset	2413
10405 f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10369 diff changeset	2414 GCTraceTime tm_c("class unloading", print_phases(), true, &_gc_timer);
10188 2f50bc369470 8013160: NPG: Remove unnecessary mark stack draining after CodeCache::do_unloading stefank parents: 10186 diff changeset	2415
2f50bc369470 8013160: NPG: Remove unnecessary mark stack draining after CodeCache::do_unloading stefank parents: 10186 diff changeset	2416 // 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	2417 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	2418
0 a61af66fc99e Initial load duke parents: diff changeset	2419 // Follow system dictionary roots and unload classes.
a61af66fc99e Initial load duke parents: diff changeset	2420 bool purged_class = SystemDictionary::do_unloading(is_alive_closure());
a61af66fc99e Initial load duke parents: diff changeset	2421
10188 2f50bc369470 8013160: NPG: Remove unnecessary mark stack draining after CodeCache::do_unloading stefank parents: 10186 diff changeset	2422 // Unload nmethods.
6787 8966c2d65d96 7200470: KeepAliveClosure not needed in CodeCache::do_unloading brutisso parents: 6757 diff changeset	2423 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	2424
2f50bc369470 8013160: NPG: Remove unnecessary mark stack draining after CodeCache::do_unloading stefank parents: 10186 diff changeset	2425 // 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	2426 Klass::clean_weak_klass_links(is_alive_closure());
0 a61af66fc99e Initial load duke parents: diff changeset	2427
10188 2f50bc369470 8013160: NPG: Remove unnecessary mark stack draining after CodeCache::do_unloading stefank parents: 10186 diff changeset	2428 // Delete entries for dead interned strings.
0 a61af66fc99e Initial load duke parents: diff changeset	2429 StringTable::unlink(is_alive_closure());
10188 2f50bc369470 8013160: NPG: Remove unnecessary mark stack draining after CodeCache::do_unloading stefank parents: 10186 diff changeset	2430
2177 3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 2147 diff changeset	2431 // Clean up unreferenced symbols in symbol table.
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 2147 diff changeset	2432 SymbolTable::unlink();
10405 f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10369 diff changeset	2433 _gc_tracer.report_object_count_after_gc(is_alive_closure());
0 a61af66fc99e Initial load duke parents: diff changeset	2434 }
a61af66fc99e Initial load duke parents: diff changeset	2435
6725 da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	2436 void PSParallelCompact::follow_class_loader(ParCompactionManager* cm,
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	2437 ClassLoaderData* cld) {
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	2438 PSParallelCompact::MarkAndPushClosure mark_and_push_closure(cm);
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	2439 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	2440
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	2441 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	2442 }
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	2443
0 a61af66fc99e Initial load duke parents: diff changeset	2444 // This should be moved to the shared markSweep code!
a61af66fc99e Initial load duke parents: diff changeset	2445 class PSAlwaysTrueClosure: public BoolObjectClosure {
a61af66fc99e Initial load duke parents: diff changeset	2446 public:
a61af66fc99e Initial load duke parents: diff changeset	2447 bool do_object_b(oop p) { return true; }
a61af66fc99e Initial load duke parents: diff changeset	2448 };
a61af66fc99e Initial load duke parents: diff changeset	2449 static PSAlwaysTrueClosure always_true;
a61af66fc99e Initial load duke parents: diff changeset	2450
a61af66fc99e Initial load duke parents: diff changeset	2451 void PSParallelCompact::adjust_roots() {
a61af66fc99e Initial load duke parents: diff changeset	2452 // Adjust the pointers to reflect the new locations
10405 f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10369 diff changeset	2453 GCTraceTime tm("adjust roots", print_phases(), true, &_gc_timer);
0 a61af66fc99e Initial load duke parents: diff changeset	2454
6725 da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	2455 // 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	2456 ClassLoaderDataGraph::clear_claimed_marks();
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	2457
0 a61af66fc99e Initial load duke parents: diff changeset	2458 // General strong roots.
10179 a08c80e9e1e5 8012687: Remove unused is_root checks and closures stefank parents: 9076 diff changeset	2459 Universe::oops_do(adjust_pointer_closure());
a08c80e9e1e5 8012687: Remove unused is_root checks and closures stefank parents: 9076 diff changeset	2460 JNIHandles::oops_do(adjust_pointer_closure()); // Global (strong) JNI handles
a08c80e9e1e5 8012687: Remove unused is_root checks and closures stefank parents: 9076 diff changeset	2461 CLDToOopClosure adjust_from_cld(adjust_pointer_closure());
a08c80e9e1e5 8012687: Remove unused is_root checks and closures stefank parents: 9076 diff changeset	2462 Threads::oops_do(adjust_pointer_closure(), &adjust_from_cld, NULL);
a08c80e9e1e5 8012687: Remove unused is_root checks and closures stefank parents: 9076 diff changeset	2463 ObjectSynchronizer::oops_do(adjust_pointer_closure());
a08c80e9e1e5 8012687: Remove unused is_root checks and closures stefank parents: 9076 diff changeset	2464 FlatProfiler::oops_do(adjust_pointer_closure());
a08c80e9e1e5 8012687: Remove unused is_root checks and closures stefank parents: 9076 diff changeset	2465 Management::oops_do(adjust_pointer_closure());
a08c80e9e1e5 8012687: Remove unused is_root checks and closures stefank parents: 9076 diff changeset	2466 JvmtiExport::oops_do(adjust_pointer_closure());
0 a61af66fc99e Initial load duke parents: diff changeset	2467 // SO_AllClasses
10179 a08c80e9e1e5 8012687: Remove unused is_root checks and closures stefank parents: 9076 diff changeset	2468 SystemDictionary::oops_do(adjust_pointer_closure());
a08c80e9e1e5 8012687: Remove unused is_root checks and closures stefank parents: 9076 diff changeset	2469 ClassLoaderDataGraph::oops_do(adjust_pointer_closure(), adjust_klass_closure(), true);
0 a61af66fc99e Initial load duke parents: diff changeset	2470
a61af66fc99e Initial load duke parents: diff changeset	2471 // Now adjust pointers in remaining weak roots. (All of which should
a61af66fc99e Initial load duke parents: diff changeset	2472 // have been cleared if they pointed to non-surviving objects.)
a61af66fc99e Initial load duke parents: diff changeset	2473 // Global (weak) JNI handles
10179 a08c80e9e1e5 8012687: Remove unused is_root checks and closures stefank parents: 9076 diff changeset	2474 JNIHandles::weak_oops_do(&always_true, adjust_pointer_closure());
0 a61af66fc99e Initial load duke parents: diff changeset	2475
a61af66fc99e Initial load duke parents: diff changeset	2476 CodeCache::oops_do(adjust_pointer_closure());
10179 a08c80e9e1e5 8012687: Remove unused is_root checks and closures stefank parents: 9076 diff changeset	2477 StringTable::oops_do(adjust_pointer_closure());
a08c80e9e1e5 8012687: Remove unused is_root checks and closures stefank parents: 9076 diff changeset	2478 ref_processor()->weak_oops_do(adjust_pointer_closure());
0 a61af66fc99e Initial load duke parents: diff changeset	2479 // Roots were visited so references into the young gen in roots
a61af66fc99e Initial load duke parents: diff changeset	2480 // may have been scanned. Process them also.
a61af66fc99e Initial load duke parents: diff changeset	2481 // Should the reference processor have a span that excludes
a61af66fc99e Initial load duke parents: diff changeset	2482 // young gen objects?
10179 a08c80e9e1e5 8012687: Remove unused is_root checks and closures stefank parents: 9076 diff changeset	2483 PSScavenge::reference_processor()->weak_oops_do(adjust_pointer_closure());
0 a61af66fc99e Initial load duke parents: diff changeset	2484 }
a61af66fc99e Initial load duke parents: diff changeset	2485
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2486 void PSParallelCompact::enqueue_region_draining_tasks(GCTaskQueue* q,
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2487 uint parallel_gc_threads)
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2488 {
10405 f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10369 diff changeset	2489 GCTraceTime tm("drain task setup", print_phases(), true, &_gc_timer);
0 a61af66fc99e Initial load duke parents: diff changeset	2490
4095 bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 3979 diff changeset	2491 // Find the threads that are active
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 3979 diff changeset	2492 unsigned int which = 0;
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 3979 diff changeset	2493
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 3979 diff changeset	2494 const uint task_count = MAX2(parallel_gc_threads, 1U);
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 3979 diff changeset	2495 for (uint j = 0; j < task_count; j++) {
1833 8b10f48633dc 6984287: Regularize how GC parallel workers are specified. jmasa parents: 1638 diff changeset	2496 q->enqueue(new DrainStacksCompactionTask(j));
4095 bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 3979 diff changeset	2497 ParCompactionManager::verify_region_list_empty(j);
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 3979 diff changeset	2498 // 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	2499 // 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	2500 // 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	2501 // a draining stack.
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 3979 diff changeset	2502 ParCompactionManager* cm = ParCompactionManager::manager_array(j);
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 3979 diff changeset	2503 cm->set_region_stack(NULL);
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 3979 diff changeset	2504 cm->set_region_stack_index((uint)max_uintx);
0 a61af66fc99e Initial load duke parents: diff changeset	2505 }
4095 bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 3979 diff changeset	2506 ParCompactionManager::reset_recycled_stack_index();
0 a61af66fc99e Initial load duke parents: diff changeset	2507
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2508 // Find all regions that are available (can be filled immediately) and
0 a61af66fc99e Initial load duke parents: diff changeset	2509 // 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	2510 // order (high to low) so the regions will be removed in ascending order.
0 a61af66fc99e Initial load duke parents: diff changeset	2511
a61af66fc99e Initial load duke parents: diff changeset	2512 const ParallelCompactData& sd = PSParallelCompact::summary_data();
a61af66fc99e Initial load duke parents: diff changeset	2513
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2514 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	2515 // 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	2516 // "which" must be 0 <= which < task_count
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 3979 diff changeset	2517
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 3979 diff changeset	2518 which = 0;
6725 da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	2519 // 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	2520 // be used with an old_space_id == 0.
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	2521 for (unsigned int id = to_space_id; id + 1 > old_space_id; --id) {
0 a61af66fc99e Initial load duke parents: diff changeset	2522 SpaceInfo* const space_info = _space_info + id;
a61af66fc99e Initial load duke parents: diff changeset	2523 MutableSpace* const space = space_info->space();
a61af66fc99e Initial load duke parents: diff changeset	2524 HeapWord* const new_top = space_info->new_top();
a61af66fc99e Initial load duke parents: diff changeset	2525
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2526 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	2527 const size_t end_region =
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2528 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	2529
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	2530 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	2531 if (sd.region(cur)->claim_unsafe()) {
4095 bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 3979 diff changeset	2532 ParCompactionManager::region_list_push(which, cur);
0 a61af66fc99e Initial load duke parents: diff changeset	2533
a61af66fc99e Initial load duke parents: diff changeset	2534 if (TraceParallelOldGCCompactionPhase && Verbose) {
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2535 const size_t count_mod_8 = fillable_regions & 7;
0 a61af66fc99e Initial load duke parents: diff changeset	2536 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	2537 gclog_or_tty->print(" " SIZE_FORMAT_W(7), cur);
0 a61af66fc99e Initial load duke parents: diff changeset	2538 if (count_mod_8 == 7) gclog_or_tty->cr();
a61af66fc99e Initial load duke parents: diff changeset	2539 }
a61af66fc99e Initial load duke parents: diff changeset	2540
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2541 NOT_PRODUCT(++fillable_regions;)
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2542
4095 bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 3979 diff changeset	2543 // Assign regions to tasks in round-robin fashion.
0 a61af66fc99e Initial load duke parents: diff changeset	2544 if (++which == task_count) {
4095 bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 3979 diff changeset	2545 assert(which <= parallel_gc_threads,
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 3979 diff changeset	2546 "Inconsistent number of workers");
0 a61af66fc99e Initial load duke parents: diff changeset	2547 which = 0;
a61af66fc99e Initial load duke parents: diff changeset	2548 }
a61af66fc99e Initial load duke parents: diff changeset	2549 }
a61af66fc99e Initial load duke parents: diff changeset	2550 }
a61af66fc99e Initial load duke parents: diff changeset	2551 }
a61af66fc99e Initial load duke parents: diff changeset	2552
a61af66fc99e Initial load duke parents: diff changeset	2553 if (TraceParallelOldGCCompactionPhase) {
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2554 if (Verbose && (fillable_regions & 7) != 0) gclog_or_tty->cr();
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2555 gclog_or_tty->print_cr("%u initially fillable regions", fillable_regions);
0 a61af66fc99e Initial load duke parents: diff changeset	2556 }
a61af66fc99e Initial load duke parents: diff changeset	2557 }
a61af66fc99e Initial load duke parents: diff changeset	2558
a61af66fc99e Initial load duke parents: diff changeset	2559 #define PAR_OLD_DENSE_PREFIX_OVER_PARTITIONING 4
a61af66fc99e Initial load duke parents: diff changeset	2560
a61af66fc99e Initial load duke parents: diff changeset	2561 void PSParallelCompact::enqueue_dense_prefix_tasks(GCTaskQueue* q,
a61af66fc99e Initial load duke parents: diff changeset	2562 uint parallel_gc_threads) {
10405 f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10369 diff changeset	2563 GCTraceTime tm("dense prefix task setup", print_phases(), true, &_gc_timer);
0 a61af66fc99e Initial load duke parents: diff changeset	2564
a61af66fc99e Initial load duke parents: diff changeset	2565 ParallelCompactData& sd = PSParallelCompact::summary_data();
a61af66fc99e Initial load duke parents: diff changeset	2566
a61af66fc99e Initial load duke parents: diff changeset	2567 // Iterate over all the spaces adding tasks for updating
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2568 // regions in the dense prefix. Assume that 1 gc thread
0 a61af66fc99e Initial load duke parents: diff changeset	2569 // will work on opening the gaps and the remaining gc threads
a61af66fc99e Initial load duke parents: diff changeset	2570 // will work on the dense prefix.
482 7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	2571 unsigned int space_id;
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	2572 for (space_id = old_space_id; space_id < last_space_id; ++ space_id) {
0 a61af66fc99e Initial load duke parents: diff changeset	2573 HeapWord* const dense_prefix_end = _space_info[space_id].dense_prefix();
a61af66fc99e Initial load duke parents: diff changeset	2574 const MutableSpace* const space = _space_info[space_id].space();
a61af66fc99e Initial load duke parents: diff changeset	2575
a61af66fc99e Initial load duke parents: diff changeset	2576 if (dense_prefix_end == space->bottom()) {
a61af66fc99e Initial load duke parents: diff changeset	2577 // There is no dense prefix for this space.
a61af66fc99e Initial load duke parents: diff changeset	2578 continue;
a61af66fc99e Initial load duke parents: diff changeset	2579 }
a61af66fc99e Initial load duke parents: diff changeset	2580
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2581 // The dense prefix is before this region.
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2582 size_t region_index_end_dense_prefix =
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2583 sd.addr_to_region_idx(dense_prefix_end);
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2584 RegionData* const dense_prefix_cp =
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2585 sd.region(region_index_end_dense_prefix);
0 a61af66fc99e Initial load duke parents: diff changeset	2586 assert(dense_prefix_end == space->end() \|\|
a61af66fc99e Initial load duke parents: diff changeset	2587 dense_prefix_cp->available() \|\|
a61af66fc99e Initial load duke parents: diff changeset	2588 dense_prefix_cp->claimed(),
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2589 "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	2590
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2591 size_t region_index_start = sd.addr_to_region_idx(space->bottom());
0 a61af66fc99e Initial load duke parents: diff changeset	2592
a61af66fc99e Initial load duke parents: diff changeset	2593 // Is there dense prefix work?
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2594 size_t total_dense_prefix_regions =
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2595 region_index_end_dense_prefix - region_index_start;
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2596 // How many regions of the dense prefix should be given to
0 a61af66fc99e Initial load duke parents: diff changeset	2597 // each thread?
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2598 if (total_dense_prefix_regions > 0) {
0 a61af66fc99e Initial load duke parents: diff changeset	2599 uint tasks_for_dense_prefix = 1;
3251 eda9eb483d29 6841742: par compact - remove unused/unsupported options jcoomes parents: 2369 diff changeset	2600 if (total_dense_prefix_regions <=
eda9eb483d29 6841742: par compact - remove unused/unsupported options jcoomes parents: 2369 diff changeset	2601 (parallel_gc_threads * PAR_OLD_DENSE_PREFIX_OVER_PARTITIONING)) {
eda9eb483d29 6841742: par compact - remove unused/unsupported options jcoomes parents: 2369 diff changeset	2602 // Don't over partition. This assumes that
eda9eb483d29 6841742: par compact - remove unused/unsupported options jcoomes parents: 2369 diff changeset	2603 // PAR_OLD_DENSE_PREFIX_OVER_PARTITIONING is a small integer value
eda9eb483d29 6841742: par compact - remove unused/unsupported options jcoomes parents: 2369 diff changeset	2604 // so there are not many regions to process.
eda9eb483d29 6841742: par compact - remove unused/unsupported options jcoomes parents: 2369 diff changeset	2605 tasks_for_dense_prefix = parallel_gc_threads;
eda9eb483d29 6841742: par compact - remove unused/unsupported options jcoomes parents: 2369 diff changeset	2606 } else {
eda9eb483d29 6841742: par compact - remove unused/unsupported options jcoomes parents: 2369 diff changeset	2607 // Over partition
eda9eb483d29 6841742: par compact - remove unused/unsupported options jcoomes parents: 2369 diff changeset	2608 tasks_for_dense_prefix = parallel_gc_threads *
eda9eb483d29 6841742: par compact - remove unused/unsupported options jcoomes parents: 2369 diff changeset	2609 PAR_OLD_DENSE_PREFIX_OVER_PARTITIONING;
0 a61af66fc99e Initial load duke parents: diff changeset	2610 }
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2611 size_t regions_per_thread = total_dense_prefix_regions /
0 a61af66fc99e Initial load duke parents: diff changeset	2612 tasks_for_dense_prefix;
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2613 // Give each thread at least 1 region.
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2614 if (regions_per_thread == 0) {
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2615 regions_per_thread = 1;
0 a61af66fc99e Initial load duke parents: diff changeset	2616 }
a61af66fc99e Initial load duke parents: diff changeset	2617
a61af66fc99e Initial load duke parents: diff changeset	2618 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	2619 if (region_index_start >= region_index_end_dense_prefix) {
0 a61af66fc99e Initial load duke parents: diff changeset	2620 break;
a61af66fc99e Initial load duke parents: diff changeset	2621 }
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2622 // region_index_end is not processed
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2623 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	2624 region_index_end_dense_prefix);
482 7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	2625 q->enqueue(new UpdateDensePrefixTask(SpaceId(space_id),
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	2626 region_index_start,
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	2627 region_index_end));
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2628 region_index_start = region_index_end;
0 a61af66fc99e Initial load duke parents: diff changeset	2629 }
a61af66fc99e Initial load duke parents: diff changeset	2630 }
a61af66fc99e Initial load duke parents: diff changeset	2631 // This gets any part of the dense prefix that did not
a61af66fc99e Initial load duke parents: diff changeset	2632 // fit evenly.
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2633 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	2634 q->enqueue(new UpdateDensePrefixTask(SpaceId(space_id),
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	2635 region_index_start,
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	2636 region_index_end_dense_prefix));
0 a61af66fc99e Initial load duke parents: diff changeset	2637 }
482 7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	2638 }
0 a61af66fc99e Initial load duke parents: diff changeset	2639 }
a61af66fc99e Initial load duke parents: diff changeset	2640
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2641 void PSParallelCompact::enqueue_region_stealing_tasks(
0 a61af66fc99e Initial load duke parents: diff changeset	2642 GCTaskQueue* q,
a61af66fc99e Initial load duke parents: diff changeset	2643 ParallelTaskTerminator* terminator_ptr,
a61af66fc99e Initial load duke parents: diff changeset	2644 uint parallel_gc_threads) {
10405 f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10369 diff changeset	2645 GCTraceTime tm("steal task setup", print_phases(), true, &_gc_timer);
0 a61af66fc99e Initial load duke parents: diff changeset	2646
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2647 // Once a thread has drained it's stack, it should try to steal regions from
0 a61af66fc99e Initial load duke parents: diff changeset	2648 // other threads.
a61af66fc99e Initial load duke parents: diff changeset	2649 if (parallel_gc_threads > 1) {
a61af66fc99e Initial load duke parents: diff changeset	2650 for (uint j = 0; j < parallel_gc_threads; j++) {
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2651 q->enqueue(new StealRegionCompactionTask(terminator_ptr));
0 a61af66fc99e Initial load duke parents: diff changeset	2652 }
a61af66fc99e Initial load duke parents: diff changeset	2653 }
a61af66fc99e Initial load duke parents: diff changeset	2654 }
a61af66fc99e Initial load duke parents: diff changeset	2655
10369 5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	2656 #ifdef ASSERT
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	2657 // 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	2658 // region.
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	2659 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	2660 {
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	2661 if (!TraceParallelOldGCCompactionPhase) return;
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	2662
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	2663 typedef ParallelCompactData::RegionData rd_t;
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	2664 ParallelCompactData& sd = summary_data();
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	2665
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	2666 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	2667 MutableSpace* const spc = _space_info[id].space();
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	2668 if (spc->bottom() != spc->top()) {
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	2669 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	2670 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	2671 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	2672
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	2673 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	2674 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	2675 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	2676
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	2677 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	2678 ++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	2679 }
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	2680 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	2681 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	2682 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	2683 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	2684 }
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	2685 out->cr();
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	2686 }
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	2687 }
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	2688 }
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	2689 #endif // #ifdef ASSERT
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	2690
0 a61af66fc99e Initial load duke parents: diff changeset	2691 void PSParallelCompact::compact() {
a61af66fc99e Initial load duke parents: diff changeset	2692 // trace("5");
10405 f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10369 diff changeset	2693 GCTraceTime tm("compaction phase", print_phases(), true, &_gc_timer);
0 a61af66fc99e Initial load duke parents: diff changeset	2694
a61af66fc99e Initial load duke parents: diff changeset	2695 ParallelScavengeHeap* heap = (ParallelScavengeHeap*)Universe::heap();
a61af66fc99e Initial load duke parents: diff changeset	2696 assert(heap->kind() == CollectedHeap::ParallelScavengeHeap, "Sanity");
a61af66fc99e Initial load duke parents: diff changeset	2697 PSOldGen* old_gen = heap->old_gen();
a61af66fc99e Initial load duke parents: diff changeset	2698 old_gen->start_array()->reset();
a61af66fc99e Initial load duke parents: diff changeset	2699 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	2700 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	2701 TaskQueueSetSuper* qset = ParCompactionManager::region_array();
4095 bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 3979 diff changeset	2702 ParallelTaskTerminator terminator(active_gc_threads, qset);
0 a61af66fc99e Initial load duke parents: diff changeset	2703
a61af66fc99e Initial load duke parents: diff changeset	2704 GCTaskQueue* q = GCTaskQueue::create();
4095 bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 3979 diff changeset	2705 enqueue_region_draining_tasks(q, active_gc_threads);
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 3979 diff changeset	2706 enqueue_dense_prefix_tasks(q, active_gc_threads);
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 3979 diff changeset	2707 enqueue_region_stealing_tasks(q, &terminator, active_gc_threads);
0 a61af66fc99e Initial load duke parents: diff changeset	2708
a61af66fc99e Initial load duke parents: diff changeset	2709 {
10405 f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10369 diff changeset	2710 GCTraceTime tm_pc("par compact", print_phases(), true, &_gc_timer);
0 a61af66fc99e Initial load duke parents: diff changeset	2711
4095 bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 3979 diff changeset	2712 gc_task_manager()->execute_and_wait(q);
0 a61af66fc99e Initial load duke parents: diff changeset	2713
a61af66fc99e Initial load duke parents: diff changeset	2714 #ifdef ASSERT
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2715 // Verify that all regions have been processed before the deferred updates.
0 a61af66fc99e Initial load duke parents: diff changeset	2716 for (unsigned int id = old_space_id; id < last_space_id; ++id) {
a61af66fc99e Initial load duke parents: diff changeset	2717 verify_complete(SpaceId(id));
a61af66fc99e Initial load duke parents: diff changeset	2718 }
a61af66fc99e Initial load duke parents: diff changeset	2719 #endif
a61af66fc99e Initial load duke parents: diff changeset	2720 }
a61af66fc99e Initial load duke parents: diff changeset	2721
a61af66fc99e Initial load duke parents: diff changeset	2722 {
a61af66fc99e Initial load duke parents: diff changeset	2723 // Update the deferred objects, if any. Any compaction manager can be used.
10405 f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10369 diff changeset	2724 GCTraceTime tm_du("deferred updates", print_phases(), true, &_gc_timer);
0 a61af66fc99e Initial load duke parents: diff changeset	2725 ParCompactionManager* cm = ParCompactionManager::manager_array(0);
a61af66fc99e Initial load duke parents: diff changeset	2726 for (unsigned int id = old_space_id; id < last_space_id; ++id) {
a61af66fc99e Initial load duke parents: diff changeset	2727 update_deferred_objects(cm, SpaceId(id));
a61af66fc99e Initial load duke parents: diff changeset	2728 }
a61af66fc99e Initial load duke parents: diff changeset	2729 }
10369 5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	2730
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	2731 DEBUG_ONLY(write_block_fill_histogram(gclog_or_tty));
0 a61af66fc99e Initial load duke parents: diff changeset	2732 }
a61af66fc99e Initial load duke parents: diff changeset	2733
a61af66fc99e Initial load duke parents: diff changeset	2734 #ifdef ASSERT
a61af66fc99e Initial load duke parents: diff changeset	2735 void PSParallelCompact::verify_complete(SpaceId space_id) {
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2736 // 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	2737 // and all Regions between new_top() and top() should be available (i.e.,
0 a61af66fc99e Initial load duke parents: diff changeset	2738 // should have been emptied).
a61af66fc99e Initial load duke parents: diff changeset	2739 ParallelCompactData& sd = summary_data();
a61af66fc99e Initial load duke parents: diff changeset	2740 SpaceInfo si = _space_info[space_id];
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2741 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	2742 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	2743 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	2744 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	2745 const size_t old_top_region = sd.addr_to_region_idx(old_top_addr);
0 a61af66fc99e Initial load duke parents: diff changeset	2746
a61af66fc99e Initial load duke parents: diff changeset	2747 bool issued_a_warning = false;
a61af66fc99e Initial load duke parents: diff changeset	2748
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2749 size_t cur_region;
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2750 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	2751 const RegionData* const c = sd.region(cur_region);
0 a61af66fc99e Initial load duke parents: diff changeset	2752 if (!c->completed()) {
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2753 warning("region " SIZE_FORMAT " not filled: "
0 a61af66fc99e Initial load duke parents: diff changeset	2754 "destination_count=" SIZE_FORMAT,
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2755 cur_region, c->destination_count());
0 a61af66fc99e Initial load duke parents: diff changeset	2756 issued_a_warning = true;
a61af66fc99e Initial load duke parents: diff changeset	2757 }
a61af66fc99e Initial load duke parents: diff changeset	2758 }
a61af66fc99e Initial load duke parents: diff changeset	2759
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2760 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	2761 const RegionData* const c = sd.region(cur_region);
0 a61af66fc99e Initial load duke parents: diff changeset	2762 if (!c->available()) {
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2763 warning("region " SIZE_FORMAT " not empty: "
0 a61af66fc99e Initial load duke parents: diff changeset	2764 "destination_count=" SIZE_FORMAT,
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2765 cur_region, c->destination_count());
0 a61af66fc99e Initial load duke parents: diff changeset	2766 issued_a_warning = true;
a61af66fc99e Initial load duke parents: diff changeset	2767 }
a61af66fc99e Initial load duke parents: diff changeset	2768 }
a61af66fc99e Initial load duke parents: diff changeset	2769
a61af66fc99e Initial load duke parents: diff changeset	2770 if (issued_a_warning) {
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2771 print_region_ranges();
0 a61af66fc99e Initial load duke parents: diff changeset	2772 }
a61af66fc99e Initial load duke parents: diff changeset	2773 }
a61af66fc99e Initial load duke parents: diff changeset	2774 #endif // #ifdef ASSERT
a61af66fc99e Initial load duke parents: diff changeset	2775
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2776 // Update interior oops in the ranges of regions [beg_region, end_region).
0 a61af66fc99e Initial load duke parents: diff changeset	2777 void
a61af66fc99e Initial load duke parents: diff changeset	2778 PSParallelCompact::update_and_deadwood_in_dense_prefix(ParCompactionManager* cm,
a61af66fc99e Initial load duke parents: diff changeset	2779 SpaceId space_id,
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2780 size_t beg_region,
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2781 size_t end_region) {
0 a61af66fc99e Initial load duke parents: diff changeset	2782 ParallelCompactData& sd = summary_data();
a61af66fc99e Initial load duke parents: diff changeset	2783 ParMarkBitMap* const mbm = mark_bitmap();
a61af66fc99e Initial load duke parents: diff changeset	2784
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2785 HeapWord* beg_addr = sd.region_to_addr(beg_region);
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2786 HeapWord* const end_addr = sd.region_to_addr(end_region);
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2787 assert(beg_region <= end_region, "bad region range");
0 a61af66fc99e Initial load duke parents: diff changeset	2788 assert(end_addr <= dense_prefix(space_id), "not in the dense prefix");
a61af66fc99e Initial load duke parents: diff changeset	2789
a61af66fc99e Initial load duke parents: diff changeset	2790 #ifdef ASSERT
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2791 // Claim the regions to avoid triggering an assert when they are marked as
0 a61af66fc99e Initial load duke parents: diff changeset	2792 // filled.
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2793 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	2794 assert(sd.region(claim_region)->claim_unsafe(), "claim() failed");
0 a61af66fc99e Initial load duke parents: diff changeset	2795 }
a61af66fc99e Initial load duke parents: diff changeset	2796 #endif // #ifdef ASSERT
a61af66fc99e Initial load duke parents: diff changeset	2797
a61af66fc99e Initial load duke parents: diff changeset	2798 if (beg_addr != space(space_id)->bottom()) {
a61af66fc99e Initial load duke parents: diff changeset	2799 // 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	2800 // 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	2801 // 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	2802 // 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	2803 // 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	2804 // 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	2805 // space.
0 a61af66fc99e Initial load duke parents: diff changeset	2806 assert(beg_addr > space(space_id)->bottom(), "sanity");
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2807 const RegionData* const cp = sd.region(beg_region);
0 a61af66fc99e Initial load duke parents: diff changeset	2808 if (cp->partial_obj_size() != 0) {
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2809 beg_addr = sd.partial_obj_end(beg_region);
0 a61af66fc99e Initial load duke parents: diff changeset	2810 } else if (dead_space_crosses_boundary(cp, mbm->addr_to_bit(beg_addr))) {
a61af66fc99e Initial load duke parents: diff changeset	2811 beg_addr = mbm->find_obj_beg(beg_addr, end_addr);
a61af66fc99e Initial load duke parents: diff changeset	2812 }
a61af66fc99e Initial load duke parents: diff changeset	2813 }
a61af66fc99e Initial load duke parents: diff changeset	2814
a61af66fc99e Initial load duke parents: diff changeset	2815 if (beg_addr < end_addr) {
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2816 // A live object or block of dead space starts in this range of Regions.
0 a61af66fc99e Initial load duke parents: diff changeset	2817 HeapWord* const dense_prefix_end = dense_prefix(space_id);
a61af66fc99e Initial load duke parents: diff changeset	2818
a61af66fc99e Initial load duke parents: diff changeset	2819 // Create closures and iterate.
a61af66fc99e Initial load duke parents: diff changeset	2820 UpdateOnlyClosure update_closure(mbm, cm, space_id);
a61af66fc99e Initial load duke parents: diff changeset	2821 FillClosure fill_closure(cm, space_id);
a61af66fc99e Initial load duke parents: diff changeset	2822 ParMarkBitMap::IterationStatus status;
a61af66fc99e Initial load duke parents: diff changeset	2823 status = mbm->iterate(&update_closure, &fill_closure, beg_addr, end_addr,
a61af66fc99e Initial load duke parents: diff changeset	2824 dense_prefix_end);
a61af66fc99e Initial load duke parents: diff changeset	2825 if (status == ParMarkBitMap::incomplete) {
a61af66fc99e Initial load duke parents: diff changeset	2826 update_closure.do_addr(update_closure.source());
a61af66fc99e Initial load duke parents: diff changeset	2827 }
a61af66fc99e Initial load duke parents: diff changeset	2828 }
a61af66fc99e Initial load duke parents: diff changeset	2829
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2830 // Mark the regions as filled.
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2831 RegionData* const beg_cp = sd.region(beg_region);
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2832 RegionData* const end_cp = sd.region(end_region);
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2833 for (RegionData* cp = beg_cp; cp < end_cp; ++cp) {
0 a61af66fc99e Initial load duke parents: diff changeset	2834 cp->set_completed();
a61af66fc99e Initial load duke parents: diff changeset	2835 }
a61af66fc99e Initial load duke parents: diff changeset	2836 }
a61af66fc99e Initial load duke parents: diff changeset	2837
a61af66fc99e Initial load duke parents: diff changeset	2838 // Return the SpaceId for the space containing addr. If addr is not in the
a61af66fc99e Initial load duke parents: diff changeset	2839 // heap, last_space_id is returned. In debug mode it expects the address to be
a61af66fc99e Initial load duke parents: diff changeset	2840 // in the heap and asserts such.
a61af66fc99e Initial load duke parents: diff changeset	2841 PSParallelCompact::SpaceId PSParallelCompact::space_id(HeapWord* addr) {
a61af66fc99e Initial load duke parents: diff changeset	2842 assert(Universe::heap()->is_in_reserved(addr), "addr not in the heap");
a61af66fc99e Initial load duke parents: diff changeset	2843
6725 da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	2844 for (unsigned int id = old_space_id; id < last_space_id; ++id) {
0 a61af66fc99e Initial load duke parents: diff changeset	2845 if (_space_info[id].space()->contains(addr)) {
a61af66fc99e Initial load duke parents: diff changeset	2846 return SpaceId(id);
a61af66fc99e Initial load duke parents: diff changeset	2847 }
a61af66fc99e Initial load duke parents: diff changeset	2848 }
a61af66fc99e Initial load duke parents: diff changeset	2849
a61af66fc99e Initial load duke parents: diff changeset	2850 assert(false, "no space contains the addr");
a61af66fc99e Initial load duke parents: diff changeset	2851 return last_space_id;
a61af66fc99e Initial load duke parents: diff changeset	2852 }
a61af66fc99e Initial load duke parents: diff changeset	2853
a61af66fc99e Initial load duke parents: diff changeset	2854 void PSParallelCompact::update_deferred_objects(ParCompactionManager* cm,
a61af66fc99e Initial load duke parents: diff changeset	2855 SpaceId id) {
a61af66fc99e Initial load duke parents: diff changeset	2856 assert(id < last_space_id, "bad space id");
a61af66fc99e Initial load duke parents: diff changeset	2857
a61af66fc99e Initial load duke parents: diff changeset	2858 ParallelCompactData& sd = summary_data();
a61af66fc99e Initial load duke parents: diff changeset	2859 const SpaceInfo* const space_info = _space_info + id;
a61af66fc99e Initial load duke parents: diff changeset	2860 ObjectStartArray* const start_array = space_info->start_array();
a61af66fc99e Initial load duke parents: diff changeset	2861
a61af66fc99e Initial load duke parents: diff changeset	2862 const MutableSpace* const space = space_info->space();
a61af66fc99e Initial load duke parents: diff changeset	2863 assert(space_info->dense_prefix() >= space->bottom(), "dense_prefix not set");
a61af66fc99e Initial load duke parents: diff changeset	2864 HeapWord* const beg_addr = space_info->dense_prefix();
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2865 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	2866
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2867 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	2868 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	2869 const RegionData* cur_region;
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2870 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	2871 HeapWord* const addr = cur_region->deferred_obj_addr();
0 a61af66fc99e Initial load duke parents: diff changeset	2872 if (addr != NULL) {
a61af66fc99e Initial load duke parents: diff changeset	2873 if (start_array != NULL) {
a61af66fc99e Initial load duke parents: diff changeset	2874 start_array->allocate_block(addr);
a61af66fc99e Initial load duke parents: diff changeset	2875 }
a61af66fc99e Initial load duke parents: diff changeset	2876 oop(addr)->update_contents(cm);
a61af66fc99e Initial load duke parents: diff changeset	2877 assert(oop(addr)->is_oop_or_null(), "should be an oop now");
a61af66fc99e Initial load duke parents: diff changeset	2878 }
a61af66fc99e Initial load duke parents: diff changeset	2879 }
a61af66fc99e Initial load duke parents: diff changeset	2880 }
a61af66fc99e Initial load duke parents: diff changeset	2881
a61af66fc99e Initial load duke parents: diff changeset	2882 // Skip over count live words starting from beg, and return the address of the
a61af66fc99e Initial load duke parents: diff changeset	2883 // next live word. Unless marked, the word corresponding to beg is assumed to
a61af66fc99e Initial load duke parents: diff changeset	2884 // be dead. Callers must either ensure beg does not correspond to the middle of
a61af66fc99e Initial load duke parents: diff changeset	2885 // an object, or account for those live words in some other way. Callers must
a61af66fc99e Initial load duke parents: diff changeset	2886 // also ensure that there are enough live words in the range [beg, end) to skip.
a61af66fc99e Initial load duke parents: diff changeset	2887 HeapWord*
a61af66fc99e Initial load duke parents: diff changeset	2888 PSParallelCompact::skip_live_words(HeapWord* beg, HeapWord* end, size_t count)
a61af66fc99e Initial load duke parents: diff changeset	2889 {
a61af66fc99e Initial load duke parents: diff changeset	2890 assert(count > 0, "sanity");
a61af66fc99e Initial load duke parents: diff changeset	2891
a61af66fc99e Initial load duke parents: diff changeset	2892 ParMarkBitMap* m = mark_bitmap();
a61af66fc99e Initial load duke parents: diff changeset	2893 idx_t bits_to_skip = m->words_to_bits(count);
a61af66fc99e Initial load duke parents: diff changeset	2894 idx_t cur_beg = m->addr_to_bit(beg);
a61af66fc99e Initial load duke parents: diff changeset	2895 const idx_t search_end = BitMap::word_align_up(m->addr_to_bit(end));
a61af66fc99e Initial load duke parents: diff changeset	2896
a61af66fc99e Initial load duke parents: diff changeset	2897 do {
a61af66fc99e Initial load duke parents: diff changeset	2898 cur_beg = m->find_obj_beg(cur_beg, search_end);
a61af66fc99e Initial load duke parents: diff changeset	2899 idx_t cur_end = m->find_obj_end(cur_beg, search_end);
a61af66fc99e Initial load duke parents: diff changeset	2900 const size_t obj_bits = cur_end - cur_beg + 1;
a61af66fc99e Initial load duke parents: diff changeset	2901 if (obj_bits > bits_to_skip) {
a61af66fc99e Initial load duke parents: diff changeset	2902 return m->bit_to_addr(cur_beg + bits_to_skip);
a61af66fc99e Initial load duke parents: diff changeset	2903 }
a61af66fc99e Initial load duke parents: diff changeset	2904 bits_to_skip -= obj_bits;
a61af66fc99e Initial load duke parents: diff changeset	2905 cur_beg = cur_end + 1;
a61af66fc99e Initial load duke parents: diff changeset	2906 } while (bits_to_skip > 0);
a61af66fc99e Initial load duke parents: diff changeset	2907
a61af66fc99e Initial load duke parents: diff changeset	2908 // Skipping the desired number of words landed just past the end of an object.
a61af66fc99e Initial load duke parents: diff changeset	2909 // Find the start of the next object.
a61af66fc99e Initial load duke parents: diff changeset	2910 cur_beg = m->find_obj_beg(cur_beg, search_end);
a61af66fc99e Initial load duke parents: diff changeset	2911 assert(cur_beg < m->addr_to_bit(end), "not enough live words to skip");
a61af66fc99e Initial load duke parents: diff changeset	2912 return m->bit_to_addr(cur_beg);
a61af66fc99e Initial load duke parents: diff changeset	2913 }
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 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	2916 SpaceId src_space_id,
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	2917 size_t src_region_idx)
0 a61af66fc99e Initial load duke parents: diff changeset	2918 {
482 7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	2919 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	2920
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	2921 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	2922 if (split_info.dest_region_addr() == dest_addr) {
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	2923 // 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	2924 // be copied to dest_addr.
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	2925 return split_info.first_src_addr();
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	2926 }
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	2927
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	2928 const ParallelCompactData& sd = summary_data();
0 a61af66fc99e Initial load duke parents: diff changeset	2929 ParMarkBitMap* const bitmap = mark_bitmap();
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2930 const size_t RegionSize = ParallelCompactData::RegionSize;
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2931
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2932 assert(sd.is_region_aligned(dest_addr), "not aligned");
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2933 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	2934 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	2935 HeapWord* const src_region_destination = src_region_ptr->destination();
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2936
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2937 assert(dest_addr >= src_region_destination, "wrong src region");
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2938 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	2939
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2940 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	2941 HeapWord* const src_region_end = src_region_beg + RegionSize;
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2942
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2943 HeapWord* addr = src_region_beg;
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2944 if (dest_addr == src_region_destination) {
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2945 // Return the first live word in the source region.
0 a61af66fc99e Initial load duke parents: diff changeset	2946 if (partial_obj_size == 0) {
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2947 addr = bitmap->find_obj_beg(addr, src_region_end);
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2948 assert(addr < src_region_end, "no objects start in src region");
0 a61af66fc99e Initial load duke parents: diff changeset	2949 }
a61af66fc99e Initial load duke parents: diff changeset	2950 return addr;
a61af66fc99e Initial load duke parents: diff changeset	2951 }
a61af66fc99e Initial load duke parents: diff changeset	2952
a61af66fc99e Initial load duke parents: diff changeset	2953 // Must skip some live data.
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2954 size_t words_to_skip = dest_addr - src_region_destination;
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2955 assert(src_region_ptr->data_size() > words_to_skip, "wrong src region");
0 a61af66fc99e Initial load duke parents: diff changeset	2956
a61af66fc99e Initial load duke parents: diff changeset	2957 if (partial_obj_size >= words_to_skip) {
a61af66fc99e Initial load duke parents: diff changeset	2958 // All the live words to skip are part of the partial object.
a61af66fc99e Initial load duke parents: diff changeset	2959 addr += words_to_skip;
a61af66fc99e Initial load duke parents: diff changeset	2960 if (partial_obj_size == words_to_skip) {
a61af66fc99e Initial load duke parents: diff changeset	2961 // Find the first live word past the partial object.
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2962 addr = bitmap->find_obj_beg(addr, src_region_end);
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2963 assert(addr < src_region_end, "wrong src region");
0 a61af66fc99e Initial load duke parents: diff changeset	2964 }
a61af66fc99e Initial load duke parents: diff changeset	2965 return addr;
a61af66fc99e Initial load duke parents: diff changeset	2966 }
a61af66fc99e Initial load duke parents: diff changeset	2967
a61af66fc99e Initial load duke parents: diff changeset	2968 // Skip over the partial object (if any).
a61af66fc99e Initial load duke parents: diff changeset	2969 if (partial_obj_size != 0) {
a61af66fc99e Initial load duke parents: diff changeset	2970 words_to_skip -= partial_obj_size;
a61af66fc99e Initial load duke parents: diff changeset	2971 addr += partial_obj_size;
a61af66fc99e Initial load duke parents: diff changeset	2972 }
a61af66fc99e Initial load duke parents: diff changeset	2973
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2974 // 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	2975 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	2976 assert(addr < src_region_end, "wrong src region");
0 a61af66fc99e Initial load duke parents: diff changeset	2977 return addr;
a61af66fc99e Initial load duke parents: diff changeset	2978 }
a61af66fc99e Initial load duke parents: diff changeset	2979
a61af66fc99e Initial load duke parents: diff changeset	2980 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	2981 SpaceId src_space_id,
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2982 size_t beg_region,
0 a61af66fc99e Initial load duke parents: diff changeset	2983 HeapWord* end_addr)
a61af66fc99e Initial load duke parents: diff changeset	2984 {
a61af66fc99e Initial load duke parents: diff changeset	2985 ParallelCompactData& sd = summary_data();
495 234c22e54b98 6784849: par compact - can fail when to_space is non-empty jcoomes parents: 483 diff changeset	2986
234c22e54b98 6784849: par compact - can fail when to_space is non-empty jcoomes parents: 483 diff changeset	2987 #ifdef ASSERT
234c22e54b98 6784849: par compact - can fail when to_space is non-empty jcoomes parents: 483 diff changeset	2988 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	2989 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	2990 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	2991 "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	2992 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	2993 "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	2994 #endif // #ifdef ASSERT
234c22e54b98 6784849: par compact - can fail when to_space is non-empty jcoomes parents: 483 diff changeset	2995
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2996 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	2997 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	2998
234c22e54b98 6784849: par compact - can fail when to_space is non-empty jcoomes parents: 483 diff changeset	2999 // 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	3000 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	3001 RegionData* const enqueue_end =
234c22e54b98 6784849: par compact - can fail when to_space is non-empty jcoomes parents: 483 diff changeset	3002 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	3003
234c22e54b98 6784849: par compact - can fail when to_space is non-empty jcoomes parents: 483 diff changeset	3004 for (RegionData* cur = beg; cur < end; ++cur) {
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3005 assert(cur->data_size() > 0, "region must have live data");
0 a61af66fc99e Initial load duke parents: diff changeset	3006 cur->decrement_destination_count();
495 234c22e54b98 6784849: par compact - can fail when to_space is non-empty jcoomes parents: 483 diff changeset	3007 if (cur < enqueue_end && cur->available() && cur->claim()) {
1638 b2a00dd3117c 6957084: simplify TaskQueue overflow handling jcoomes parents: 1579 diff changeset	3008 cm->push_region(sd.region(cur));
0 a61af66fc99e Initial load duke parents: diff changeset	3009 }
a61af66fc99e Initial load duke parents: diff changeset	3010 }
a61af66fc99e Initial load duke parents: diff changeset	3011 }
a61af66fc99e Initial load duke parents: diff changeset	3012
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3013 size_t PSParallelCompact::next_src_region(MoveAndUpdateClosure& closure,
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3014 SpaceId& src_space_id,
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3015 HeapWord*& src_space_top,
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3016 HeapWord* end_addr)
0 a61af66fc99e Initial load duke parents: diff changeset	3017 {
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3018 typedef ParallelCompactData::RegionData RegionData;
0 a61af66fc99e Initial load duke parents: diff changeset	3019
a61af66fc99e Initial load duke parents: diff changeset	3020 ParallelCompactData& sd = PSParallelCompact::summary_data();
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3021 const size_t region_size = ParallelCompactData::RegionSize;
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3022
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3023 size_t src_region_idx = 0;
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3024
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3025 // 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	3026 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	3027 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	3028 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	3029 const RegionData* const top_region_ptr =
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3030 sd.addr_to_region_ptr(top_aligned_up);
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3031 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	3032 ++src_region_ptr;
0 a61af66fc99e Initial load duke parents: diff changeset	3033 }
a61af66fc99e Initial load duke parents: diff changeset	3034
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3035 if (src_region_ptr < top_region_ptr) {
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3036 // 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	3037 // and the source address to match src_region_ptr.
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3038 src_region_idx = sd.region(src_region_ptr);
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3039 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	3040 if (src_region_addr > closure.source()) {
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3041 closure.set_source(src_region_addr);
0 a61af66fc99e Initial load duke parents: diff changeset	3042 }
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3043 return src_region_idx;
0 a61af66fc99e Initial load duke parents: diff changeset	3044 }
a61af66fc99e Initial load duke parents: diff changeset	3045
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3046 // Switch to a new source space and find the first non-empty region.
0 a61af66fc99e Initial load duke parents: diff changeset	3047 unsigned int space_id = src_space_id + 1;
a61af66fc99e Initial load duke parents: diff changeset	3048 assert(space_id < last_space_id, "not enough spaces");
a61af66fc99e Initial load duke parents: diff changeset	3049
a61af66fc99e Initial load duke parents: diff changeset	3050 HeapWord* const destination = closure.destination();
a61af66fc99e Initial load duke parents: diff changeset	3051
a61af66fc99e Initial load duke parents: diff changeset	3052 do {
a61af66fc99e Initial load duke parents: diff changeset	3053 MutableSpace* space = _space_info[space_id].space();
a61af66fc99e Initial load duke parents: diff changeset	3054 HeapWord* const bottom = space->bottom();
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3055 const RegionData* const bottom_cp = sd.addr_to_region_ptr(bottom);
0 a61af66fc99e Initial load duke parents: diff changeset	3056
a61af66fc99e Initial load duke parents: diff changeset	3057 // Iterate over the spaces that do not compact into themselves.
a61af66fc99e Initial load duke parents: diff changeset	3058 if (bottom_cp->destination() != bottom) {
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3059 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	3060 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	3061
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3062 for (const RegionData* src_cp = bottom_cp; src_cp < top_cp; ++src_cp) {
0 a61af66fc99e Initial load duke parents: diff changeset	3063 if (src_cp->live_obj_size() > 0) {
a61af66fc99e Initial load duke parents: diff changeset	3064 // Found it.
a61af66fc99e Initial load duke parents: diff changeset	3065 assert(src_cp->destination() == destination,
a61af66fc99e Initial load duke parents: diff changeset	3066 "first live obj in the space must match the destination");
a61af66fc99e Initial load duke parents: diff changeset	3067 assert(src_cp->partial_obj_size() == 0,
a61af66fc99e Initial load duke parents: diff changeset	3068 "a space cannot begin with a partial obj");
a61af66fc99e Initial load duke parents: diff changeset	3069
a61af66fc99e Initial load duke parents: diff changeset	3070 src_space_id = SpaceId(space_id);
a61af66fc99e Initial load duke parents: diff changeset	3071 src_space_top = space->top();
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3072 const size_t src_region_idx = sd.region(src_cp);
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3073 closure.set_source(sd.region_to_addr(src_region_idx));
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3074 return src_region_idx;
0 a61af66fc99e Initial load duke parents: diff changeset	3075 } else {
a61af66fc99e Initial load duke parents: diff changeset	3076 assert(src_cp->data_size() == 0, "sanity");
a61af66fc99e Initial load duke parents: diff changeset	3077 }
a61af66fc99e Initial load duke parents: diff changeset	3078 }
a61af66fc99e Initial load duke parents: diff changeset	3079 }
a61af66fc99e Initial load duke parents: diff changeset	3080 } while (++space_id < last_space_id);
a61af66fc99e Initial load duke parents: diff changeset	3081
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3082 assert(false, "no source region was found");
0 a61af66fc99e Initial load duke parents: diff changeset	3083 return 0;
a61af66fc99e Initial load duke parents: diff changeset	3084 }
a61af66fc99e Initial load duke parents: diff changeset	3085
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3086 void PSParallelCompact::fill_region(ParCompactionManager* cm, size_t region_idx)
0 a61af66fc99e Initial load duke parents: diff changeset	3087 {
a61af66fc99e Initial load duke parents: diff changeset	3088 typedef ParMarkBitMap::IterationStatus IterationStatus;
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3089 const size_t RegionSize = ParallelCompactData::RegionSize;
0 a61af66fc99e Initial load duke parents: diff changeset	3090 ParMarkBitMap* const bitmap = mark_bitmap();
a61af66fc99e Initial load duke parents: diff changeset	3091 ParallelCompactData& sd = summary_data();
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3092 RegionData* const region_ptr = sd.region(region_idx);
0 a61af66fc99e Initial load duke parents: diff changeset	3093
a61af66fc99e Initial load duke parents: diff changeset	3094 // Get the items needed to construct the closure.
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3095 HeapWord* dest_addr = sd.region_to_addr(region_idx);
0 a61af66fc99e Initial load duke parents: diff changeset	3096 SpaceId dest_space_id = space_id(dest_addr);
a61af66fc99e Initial load duke parents: diff changeset	3097 ObjectStartArray* start_array = _space_info[dest_space_id].start_array();
a61af66fc99e Initial load duke parents: diff changeset	3098 HeapWord* new_top = _space_info[dest_space_id].new_top();
a61af66fc99e Initial load duke parents: diff changeset	3099 assert(dest_addr < new_top, "sanity");
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3100 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	3101
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3102 // Get the source region and related info.
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3103 size_t src_region_idx = region_ptr->source_region();
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3104 SpaceId src_space_id = space_id(sd.region_to_addr(src_region_idx));
0 a61af66fc99e Initial load duke parents: diff changeset	3105 HeapWord* src_space_top = _space_info[src_space_id].space()->top();
a61af66fc99e Initial load duke parents: diff changeset	3106
a61af66fc99e Initial load duke parents: diff changeset	3107 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	3108 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	3109
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3110 // 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	3111 // 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	3112 if (src_region_idx == region_idx) {
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3113 src_region_idx += 1;
0 a61af66fc99e Initial load duke parents: diff changeset	3114 }
a61af66fc99e Initial load duke parents: diff changeset	3115
a61af66fc99e Initial load duke parents: diff changeset	3116 if (bitmap->is_unmarked(closure.source())) {
a61af66fc99e Initial load duke parents: diff changeset	3117 // The first source word is in the middle of an object; copy the remainder
a61af66fc99e Initial load duke parents: diff changeset	3118 // of the object or as much as will fit. The fact that pointer updates were
a61af66fc99e Initial load duke parents: diff changeset	3119 // deferred will be noted when the object header is processed.
a61af66fc99e Initial load duke parents: diff changeset	3120 HeapWord* const old_src_addr = closure.source();
a61af66fc99e Initial load duke parents: diff changeset	3121 closure.copy_partial_obj();
a61af66fc99e Initial load duke parents: diff changeset	3122 if (closure.is_full()) {
495 234c22e54b98 6784849: par compact - can fail when to_space is non-empty jcoomes parents: 483 diff changeset	3123 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	3124 closure.source());
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3125 region_ptr->set_deferred_obj_addr(NULL);
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3126 region_ptr->set_completed();
0 a61af66fc99e Initial load duke parents: diff changeset	3127 return;
a61af66fc99e Initial load duke parents: diff changeset	3128 }
a61af66fc99e Initial load duke parents: diff changeset	3129
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3130 HeapWord* const end_addr = sd.region_align_down(closure.source());
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3131 if (sd.region_align_down(old_src_addr) != end_addr) {
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3132 // 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	3133 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	3134
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3135 // Move to the next source region, possibly switching spaces as well. All
0 a61af66fc99e Initial load duke parents: diff changeset	3136 // args except end_addr may be modified.
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3137 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	3138 end_addr);
0 a61af66fc99e Initial load duke parents: diff changeset	3139 }
a61af66fc99e Initial load duke parents: diff changeset	3140 }
a61af66fc99e Initial load duke parents: diff changeset	3141
a61af66fc99e Initial load duke parents: diff changeset	3142 do {
a61af66fc99e Initial load duke parents: diff changeset	3143 HeapWord* const cur_addr = closure.source();
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3144 HeapWord* const end_addr = MIN2(sd.region_align_up(cur_addr + 1),
0 a61af66fc99e Initial load duke parents: diff changeset	3145 src_space_top);
a61af66fc99e Initial load duke parents: diff changeset	3146 IterationStatus status = bitmap->iterate(&closure, cur_addr, end_addr);
a61af66fc99e Initial load duke parents: diff changeset	3147
a61af66fc99e Initial load duke parents: diff changeset	3148 if (status == ParMarkBitMap::incomplete) {
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3149 // 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	3150 // region.
1489 cff162798819 6888953: some calls to function-like macros are missing semicolons jcoomes parents: 1387 diff changeset	3151 assert(closure.source() < end_addr, "sanity");
0 a61af66fc99e Initial load duke parents: diff changeset	3152 HeapWord* const obj_beg = closure.source();
a61af66fc99e Initial load duke parents: diff changeset	3153 HeapWord* const range_end = MIN2(obj_beg + closure.words_remaining(),
a61af66fc99e Initial load duke parents: diff changeset	3154 src_space_top);
a61af66fc99e Initial load duke parents: diff changeset	3155 HeapWord* const obj_end = bitmap->find_obj_end(obj_beg, range_end);
a61af66fc99e Initial load duke parents: diff changeset	3156 if (obj_end < range_end) {
a61af66fc99e Initial load duke parents: diff changeset	3157 // The end was found; the entire object will fit.
a61af66fc99e Initial load duke parents: diff changeset	3158 status = closure.do_addr(obj_beg, bitmap->obj_size(obj_beg, obj_end));
a61af66fc99e Initial load duke parents: diff changeset	3159 assert(status != ParMarkBitMap::would_overflow, "sanity");
a61af66fc99e Initial load duke parents: diff changeset	3160 } else {
a61af66fc99e Initial load duke parents: diff changeset	3161 // The end was not found; the object will not fit.
a61af66fc99e Initial load duke parents: diff changeset	3162 assert(range_end < src_space_top, "obj cannot cross space boundary");
a61af66fc99e Initial load duke parents: diff changeset	3163 status = ParMarkBitMap::would_overflow;
a61af66fc99e Initial load duke parents: diff changeset	3164 }
a61af66fc99e Initial load duke parents: diff changeset	3165 }
a61af66fc99e Initial load duke parents: diff changeset	3166
a61af66fc99e Initial load duke parents: diff changeset	3167 if (status == ParMarkBitMap::would_overflow) {
a61af66fc99e Initial load duke parents: diff changeset	3168 // 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	3169 // 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	3170 region_ptr->set_deferred_obj_addr(closure.destination());
0 a61af66fc99e Initial load duke parents: diff changeset	3171 status = closure.copy_until_full(); // copies from closure.source()
a61af66fc99e Initial load duke parents: diff changeset	3172
495 234c22e54b98 6784849: par compact - can fail when to_space is non-empty jcoomes parents: 483 diff changeset	3173 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	3174 closure.source());
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3175 region_ptr->set_completed();
0 a61af66fc99e Initial load duke parents: diff changeset	3176 return;
a61af66fc99e Initial load duke parents: diff changeset	3177 }
a61af66fc99e Initial load duke parents: diff changeset	3178
a61af66fc99e Initial load duke parents: diff changeset	3179 if (status == ParMarkBitMap::full) {
495 234c22e54b98 6784849: par compact - can fail when to_space is non-empty jcoomes parents: 483 diff changeset	3180 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	3181 closure.source());
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3182 region_ptr->set_deferred_obj_addr(NULL);
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3183 region_ptr->set_completed();
0 a61af66fc99e Initial load duke parents: diff changeset	3184 return;
a61af66fc99e Initial load duke parents: diff changeset	3185 }
a61af66fc99e Initial load duke parents: diff changeset	3186
495 234c22e54b98 6784849: par compact - can fail when to_space is non-empty jcoomes parents: 483 diff changeset	3187 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	3188
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3189 // Move to the next source region, possibly switching spaces as well. All
0 a61af66fc99e Initial load duke parents: diff changeset	3190 // args except end_addr may be modified.
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3191 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	3192 end_addr);
0 a61af66fc99e Initial load duke parents: diff changeset	3193 } while (true);
a61af66fc99e Initial load duke parents: diff changeset	3194 }
a61af66fc99e Initial load duke parents: diff changeset	3195
10369 5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	3196 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	3197 {
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	3198 // 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	3199 // 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	3200 // 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	3201 // 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	3202 //
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	3203 // 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	3204 // 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	3205 // 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	3206 // 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	3207 const size_t Log2BlockSize = ParallelCompactData::Log2BlockSize;
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	3208 const size_t Log2RegionSize = ParallelCompactData::Log2RegionSize;
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	3209 const size_t RegionSize = ParallelCompactData::RegionSize;
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	3210
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	3211 ParallelCompactData& sd = summary_data();
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	3212 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	3213 if (partial_obj_size >= RegionSize) {
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	3214 return; // No objects start in this region.
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
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	3217 // 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	3218 size_t cur_block = sd.block_count();
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	3219
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	3220 const ParMarkBitMap* const bitmap = mark_bitmap();
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 const size_t Log2BitsPerBlock = Log2BlockSize - LogMinObjAlignment;
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	3223 assert((size_t)1 << Log2BitsPerBlock ==
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	3224 bitmap->words_to_bits(ParallelCompactData::BlockSize), "sanity");
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	3225
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	3226 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	3227 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	3228 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	3229 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	3230 while (beg_bit < range_end) {
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	3231 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	3232 if (new_block != cur_block) {
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	3233 cur_block = new_block;
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	3234 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	3235 }
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	3236
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	3237 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	3238 if (end_bit < range_end - 1) {
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	3239 live_bits += end_bit - beg_bit + 1;
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	3240 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	3241 } else {
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	3242 return;
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	3243 }
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	3244 }
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	3245 }
5534bd30c151 6725714: par compact - add a table to speed up bitmap searches jcoomes parents: 10361 diff changeset	3246
0 a61af66fc99e Initial load duke parents: diff changeset	3247 void
a61af66fc99e Initial load duke parents: diff changeset	3248 PSParallelCompact::move_and_update(ParCompactionManager* cm, SpaceId space_id) {
a61af66fc99e Initial load duke parents: diff changeset	3249 const MutableSpace* sp = space(space_id);
a61af66fc99e Initial load duke parents: diff changeset	3250 if (sp->is_empty()) {
a61af66fc99e Initial load duke parents: diff changeset	3251 return;
a61af66fc99e Initial load duke parents: diff changeset	3252 }
a61af66fc99e Initial load duke parents: diff changeset	3253
a61af66fc99e Initial load duke parents: diff changeset	3254 ParallelCompactData& sd = PSParallelCompact::summary_data();
a61af66fc99e Initial load duke parents: diff changeset	3255 ParMarkBitMap* const bitmap = mark_bitmap();
a61af66fc99e Initial load duke parents: diff changeset	3256 HeapWord* const dp_addr = dense_prefix(space_id);
a61af66fc99e Initial load duke parents: diff changeset	3257 HeapWord* beg_addr = sp->bottom();
a61af66fc99e Initial load duke parents: diff changeset	3258 HeapWord* end_addr = sp->top();
a61af66fc99e Initial load duke parents: diff changeset	3259
a61af66fc99e Initial load duke parents: diff changeset	3260 assert(beg_addr <= dp_addr && dp_addr <= end_addr, "bad dense prefix");
a61af66fc99e Initial load duke parents: diff changeset	3261
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3262 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	3263 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	3264 if (beg_region < dp_region) {
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3265 update_and_deadwood_in_dense_prefix(cm, space_id, beg_region, dp_region);
0 a61af66fc99e Initial load duke parents: diff changeset	3266 }
a61af66fc99e Initial load duke parents: diff changeset	3267
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3268 // 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	3269 // 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	3270 HeapWord* const dest_addr = sd.partial_obj_end(dp_region);
0 a61af66fc99e Initial load duke parents: diff changeset	3271 HeapWord* const new_top = _space_info[space_id].new_top();
a61af66fc99e Initial load duke parents: diff changeset	3272 assert(new_top >= dest_addr, "bad new_top value");
a61af66fc99e Initial load duke parents: diff changeset	3273 const size_t words = pointer_delta(new_top, dest_addr);
a61af66fc99e Initial load duke parents: diff changeset	3274
a61af66fc99e Initial load duke parents: diff changeset	3275 if (words > 0) {
a61af66fc99e Initial load duke parents: diff changeset	3276 ObjectStartArray* start_array = _space_info[space_id].start_array();
a61af66fc99e Initial load duke parents: diff changeset	3277 MoveAndUpdateClosure closure(bitmap, cm, start_array, dest_addr, words);
a61af66fc99e Initial load duke parents: diff changeset	3278
a61af66fc99e Initial load duke parents: diff changeset	3279 ParMarkBitMap::IterationStatus status;
a61af66fc99e Initial load duke parents: diff changeset	3280 status = bitmap->iterate(&closure, dest_addr, end_addr);
a61af66fc99e Initial load duke parents: diff changeset	3281 assert(status == ParMarkBitMap::full, "iteration not complete");
a61af66fc99e Initial load duke parents: diff changeset	3282 assert(bitmap->find_obj_beg(closure.source(), end_addr) == end_addr,
a61af66fc99e Initial load duke parents: diff changeset	3283 "live objects skipped because closure is full");
a61af66fc99e Initial load duke parents: diff changeset	3284 }
a61af66fc99e Initial load duke parents: diff changeset	3285 }
a61af66fc99e Initial load duke parents: diff changeset	3286
a61af66fc99e Initial load duke parents: diff changeset	3287 jlong PSParallelCompact::millis_since_last_gc() {
14309 63a4eb8bcd23 8025856: Fix typos in the GC code jwilhelm parents: 14210 diff changeset	3288 // We need a monotonically non-decreasing time in ms but
4712 e7dead7e90af 7117303: VM uses non-monotonic time source and complains that it is non-monotonic johnc parents: 4099 diff changeset	3289 // 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	3290 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	3291 jlong ret_val = now - _time_of_last_gc;
0 a61af66fc99e Initial load duke parents: diff changeset	3292 // XXX See note in genCollectedHeap::millis_since_last_gc().
a61af66fc99e Initial load duke parents: diff changeset	3293 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	3294 NOT_PRODUCT(warning("time warp: "INT64_FORMAT, ret_val);)
0 a61af66fc99e Initial load duke parents: diff changeset	3295 return 0;
a61af66fc99e Initial load duke parents: diff changeset	3296 }
a61af66fc99e Initial load duke parents: diff changeset	3297 return ret_val;
a61af66fc99e Initial load duke parents: diff changeset	3298 }
a61af66fc99e Initial load duke parents: diff changeset	3299
a61af66fc99e Initial load duke parents: diff changeset	3300 void PSParallelCompact::reset_millis_since_last_gc() {
14309 63a4eb8bcd23 8025856: Fix typos in the GC code jwilhelm parents: 14210 diff changeset	3301 // We need a monotonically non-decreasing time in ms but
4712 e7dead7e90af 7117303: VM uses non-monotonic time source and complains that it is non-monotonic johnc parents: 4099 diff changeset	3302 // 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	3303 _time_of_last_gc = os::javaTimeNanos() / NANOSECS_PER_MILLISEC;
0 a61af66fc99e Initial load duke parents: diff changeset	3304 }
a61af66fc99e Initial load duke parents: diff changeset	3305
a61af66fc99e Initial load duke parents: diff changeset	3306 ParMarkBitMap::IterationStatus MoveAndUpdateClosure::copy_until_full()
a61af66fc99e Initial load duke parents: diff changeset	3307 {
a61af66fc99e Initial load duke parents: diff changeset	3308 if (source() != destination()) {
495 234c22e54b98 6784849: par compact - can fail when to_space is non-empty jcoomes parents: 483 diff changeset	3309 DEBUG_ONLY(PSParallelCompact::check_new_location(source(), destination());)
0 a61af66fc99e Initial load duke parents: diff changeset	3310 Copy::aligned_conjoint_words(source(), destination(), words_remaining());
a61af66fc99e Initial load duke parents: diff changeset	3311 }
a61af66fc99e Initial load duke parents: diff changeset	3312 update_state(words_remaining());
a61af66fc99e Initial load duke parents: diff changeset	3313 assert(is_full(), "sanity");
a61af66fc99e Initial load duke parents: diff changeset	3314 return ParMarkBitMap::full;
a61af66fc99e Initial load duke parents: diff changeset	3315 }
a61af66fc99e Initial load duke parents: diff changeset	3316
a61af66fc99e Initial load duke parents: diff changeset	3317 void MoveAndUpdateClosure::copy_partial_obj()
a61af66fc99e Initial load duke parents: diff changeset	3318 {
a61af66fc99e Initial load duke parents: diff changeset	3319 size_t words = words_remaining();
a61af66fc99e Initial load duke parents: diff changeset	3320
a61af66fc99e Initial load duke parents: diff changeset	3321 HeapWord* const range_end = MIN2(source() + words, bitmap()->region_end());
a61af66fc99e Initial load duke parents: diff changeset	3322 HeapWord* const end_addr = bitmap()->find_obj_end(source(), range_end);
a61af66fc99e Initial load duke parents: diff changeset	3323 if (end_addr < range_end) {
a61af66fc99e Initial load duke parents: diff changeset	3324 words = bitmap()->obj_size(source(), end_addr);
a61af66fc99e Initial load duke parents: diff changeset	3325 }
a61af66fc99e Initial load duke parents: diff changeset	3326
a61af66fc99e Initial load duke parents: diff changeset	3327 // This test is necessary; if omitted, the pointer updates to a partial object
a61af66fc99e Initial load duke parents: diff changeset	3328 // that crosses the dense prefix boundary could be overwritten.
a61af66fc99e Initial load duke parents: diff changeset	3329 if (source() != destination()) {
495 234c22e54b98 6784849: par compact - can fail when to_space is non-empty jcoomes parents: 483 diff changeset	3330 DEBUG_ONLY(PSParallelCompact::check_new_location(source(), destination());)
0 a61af66fc99e Initial load duke parents: diff changeset	3331 Copy::aligned_conjoint_words(source(), destination(), words);
a61af66fc99e Initial load duke parents: diff changeset	3332 }
a61af66fc99e Initial load duke parents: diff changeset	3333 update_state(words);
a61af66fc99e Initial load duke parents: diff changeset	3334 }
a61af66fc99e Initial load duke parents: diff changeset	3335
a61af66fc99e Initial load duke parents: diff changeset	3336 ParMarkBitMapClosure::IterationStatus
a61af66fc99e Initial load duke parents: diff changeset	3337 MoveAndUpdateClosure::do_addr(HeapWord* addr, size_t words) {
a61af66fc99e Initial load duke parents: diff changeset	3338 assert(destination() != NULL, "sanity");
a61af66fc99e Initial load duke parents: diff changeset	3339 assert(bitmap()->obj_size(addr) == words, "bad size");
a61af66fc99e Initial load duke parents: diff changeset	3340
a61af66fc99e Initial load duke parents: diff changeset	3341 _source = addr;
a61af66fc99e Initial load duke parents: diff changeset	3342 assert(PSParallelCompact::summary_data().calc_new_pointer(source()) ==
a61af66fc99e Initial load duke parents: diff changeset	3343 destination(), "wrong destination");
a61af66fc99e Initial load duke parents: diff changeset	3344
a61af66fc99e Initial load duke parents: diff changeset	3345 if (words > words_remaining()) {
a61af66fc99e Initial load duke parents: diff changeset	3346 return ParMarkBitMap::would_overflow;
a61af66fc99e Initial load duke parents: diff changeset	3347 }
a61af66fc99e Initial load duke parents: diff changeset	3348
a61af66fc99e Initial load duke parents: diff changeset	3349 // The start_array must be updated even if the object is not moving.
a61af66fc99e Initial load duke parents: diff changeset	3350 if (_start_array != NULL) {
a61af66fc99e Initial load duke parents: diff changeset	3351 _start_array->allocate_block(destination());
a61af66fc99e Initial load duke parents: diff changeset	3352 }
a61af66fc99e Initial load duke parents: diff changeset	3353
a61af66fc99e Initial load duke parents: diff changeset	3354 if (destination() != source()) {
495 234c22e54b98 6784849: par compact - can fail when to_space is non-empty jcoomes parents: 483 diff changeset	3355 DEBUG_ONLY(PSParallelCompact::check_new_location(source(), destination());)
0 a61af66fc99e Initial load duke parents: diff changeset	3356 Copy::aligned_conjoint_words(source(), destination(), words);
a61af66fc99e Initial load duke parents: diff changeset	3357 }
a61af66fc99e Initial load duke parents: diff changeset	3358
a61af66fc99e Initial load duke parents: diff changeset	3359 oop moved_oop = (oop) destination();
a61af66fc99e Initial load duke parents: diff changeset	3360 moved_oop->update_contents(compaction_manager());
a61af66fc99e Initial load duke parents: diff changeset	3361 assert(moved_oop->is_oop_or_null(), "Object should be whole at this point");
a61af66fc99e Initial load duke parents: diff changeset	3362
a61af66fc99e Initial load duke parents: diff changeset	3363 update_state(words);
a61af66fc99e Initial load duke parents: diff changeset	3364 assert(destination() == (HeapWord*)moved_oop + moved_oop->size(), "sanity");
a61af66fc99e Initial load duke parents: diff changeset	3365 return is_full() ? ParMarkBitMap::full : ParMarkBitMap::incomplete;
a61af66fc99e Initial load duke parents: diff changeset	3366 }
a61af66fc99e Initial load duke parents: diff changeset	3367
a61af66fc99e Initial load duke parents: diff changeset	3368 UpdateOnlyClosure::UpdateOnlyClosure(ParMarkBitMap* mbm,
a61af66fc99e Initial load duke parents: diff changeset	3369 ParCompactionManager* cm,
a61af66fc99e Initial load duke parents: diff changeset	3370 PSParallelCompact::SpaceId space_id) :
a61af66fc99e Initial load duke parents: diff changeset	3371 ParMarkBitMapClosure(mbm, cm),
a61af66fc99e Initial load duke parents: diff changeset	3372 _space_id(space_id),
a61af66fc99e Initial load duke parents: diff changeset	3373 _start_array(PSParallelCompact::start_array(space_id))
a61af66fc99e Initial load duke parents: diff changeset	3374 {
a61af66fc99e Initial load duke parents: diff changeset	3375 }
a61af66fc99e Initial load duke parents: diff changeset	3376
a61af66fc99e Initial load duke parents: diff changeset	3377 // Updates the references in the object to their new values.
a61af66fc99e Initial load duke parents: diff changeset	3378 ParMarkBitMapClosure::IterationStatus
a61af66fc99e Initial load duke parents: diff changeset	3379 UpdateOnlyClosure::do_addr(HeapWord* addr, size_t words) {
a61af66fc99e Initial load duke parents: diff changeset	3380 do_addr(addr);
a61af66fc99e Initial load duke parents: diff changeset	3381 return ParMarkBitMap::incomplete;
a61af66fc99e Initial load duke parents: diff changeset	3382 }

Mercurial > hg > graal-compiler

annotate src/share/vm/gc_implementation/parallelScavenge/psParallelCompact.cpp @ 14309:63a4eb8bcd23