truffle: src/share/vm/gc_implementation/parallelScavenge/psParallelCompact.cpp annotate

annotate src/share/vm/gc_implementation/parallelScavenge/psParallelCompact.cpp @ 4712:e7dead7e90af

7117303: VM uses non-monotonic time source and complains that it is non-monotonic Summary: Replaces calls to os::javaTimeMillis(), which does not (and cannot) guarantee monotonicity, in GC code to an equivalent expression that uses os::javaTimeNanos(). os::javaTimeNanos is guaranteed monotonically non-decreasing if the underlying platform provides a monotonic time source. Changes in OS files are to make use of the newly defined constants in globalDefinitions.hpp. Reviewed-by: dholmes, ysr

author	johnc
date	Mon, 19 Dec 2011 10:02:05 -0800
parents	7913e93dca52
children	aa3d708d67c4

rev	line source
0 a61af66fc99e Initial load duke parents: diff changeset	1 /*
2369 92da084fefc9 6668573: CMS: reference processing crash if ParallelCMSThreads > ParallelGCThreads ysr parents: 2177 diff changeset	2 * Copyright (c) 2005, 2011, Oracle and/or its affiliates. All rights reserved.
0 a61af66fc99e Initial load duke parents: diff changeset	3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
a61af66fc99e Initial load duke parents: diff changeset	4 *
a61af66fc99e Initial load duke parents: diff changeset	5 * This code is free software; you can redistribute it and/or modify it
a61af66fc99e Initial load duke parents: diff changeset	6 * under the terms of the GNU General Public License version 2 only, as
a61af66fc99e Initial load duke parents: diff changeset	7 * published by the Free Software Foundation.
a61af66fc99e Initial load duke parents: diff changeset	8 *
a61af66fc99e Initial load duke parents: diff changeset	9 * This code is distributed in the hope that it will be useful, but WITHOUT
a61af66fc99e Initial load duke parents: diff changeset	10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
a61af66fc99e Initial load duke parents: diff changeset	11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
a61af66fc99e Initial load duke parents: diff changeset	12 * version 2 for more details (a copy is included in the LICENSE file that
a61af66fc99e Initial load duke parents: diff changeset	13 * accompanied this code).
a61af66fc99e Initial load duke parents: diff changeset	14 *
a61af66fc99e Initial load duke parents: diff changeset	15 * You should have received a copy of the GNU General Public License version
a61af66fc99e Initial load duke parents: diff changeset	16 * 2 along with this work; if not, write to the Free Software Foundation,
a61af66fc99e Initial load duke parents: diff changeset	17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
a61af66fc99e Initial load duke parents: diff changeset	18 *
1552 c18cbe5936b8 6941466: Oracle rebranding changes for Hotspot repositories trims parents: 1489 diff changeset	19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
c18cbe5936b8 6941466: Oracle rebranding changes for Hotspot repositories trims parents: 1489 diff changeset	20 * or visit www.oracle.com if you need additional information or have any
c18cbe5936b8 6941466: Oracle rebranding changes for Hotspot repositories trims parents: 1489 diff changeset	21 * questions.
0 a61af66fc99e Initial load duke parents: diff changeset	22 *
a61af66fc99e Initial load duke parents: diff changeset	23 */
a61af66fc99e Initial load duke parents: diff changeset	24
1972 f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1836 diff changeset	25 #include "precompiled.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1836 diff changeset	26 #include "classfile/symbolTable.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1836 diff changeset	27 #include "classfile/systemDictionary.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1836 diff changeset	28 #include "code/codeCache.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1836 diff changeset	29 #include "gc_implementation/parallelScavenge/gcTaskManager.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1836 diff changeset	30 #include "gc_implementation/parallelScavenge/generationSizer.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1836 diff changeset	31 #include "gc_implementation/parallelScavenge/parallelScavengeHeap.inline.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1836 diff changeset	32 #include "gc_implementation/parallelScavenge/pcTasks.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1836 diff changeset	33 #include "gc_implementation/parallelScavenge/psAdaptiveSizePolicy.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1836 diff changeset	34 #include "gc_implementation/parallelScavenge/psCompactionManager.inline.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1836 diff changeset	35 #include "gc_implementation/parallelScavenge/psMarkSweep.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1836 diff changeset	36 #include "gc_implementation/parallelScavenge/psMarkSweepDecorator.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1836 diff changeset	37 #include "gc_implementation/parallelScavenge/psOldGen.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1836 diff changeset	38 #include "gc_implementation/parallelScavenge/psParallelCompact.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1836 diff changeset	39 #include "gc_implementation/parallelScavenge/psPermGen.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1836 diff changeset	40 #include "gc_implementation/parallelScavenge/psPromotionManager.inline.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1836 diff changeset	41 #include "gc_implementation/parallelScavenge/psScavenge.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1836 diff changeset	42 #include "gc_implementation/parallelScavenge/psYoungGen.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1836 diff changeset	43 #include "gc_implementation/shared/isGCActiveMark.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1836 diff changeset	44 #include "gc_interface/gcCause.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1836 diff changeset	45 #include "memory/gcLocker.inline.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1836 diff changeset	46 #include "memory/referencePolicy.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1836 diff changeset	47 #include "memory/referenceProcessor.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1836 diff changeset	48 #include "oops/methodDataOop.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1836 diff changeset	49 #include "oops/oop.inline.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1836 diff changeset	50 #include "oops/oop.pcgc.inline.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1836 diff changeset	51 #include "runtime/fprofiler.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1836 diff changeset	52 #include "runtime/safepoint.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1836 diff changeset	53 #include "runtime/vmThread.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1836 diff changeset	54 #include "services/management.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1836 diff changeset	55 #include "services/memoryService.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1836 diff changeset	56 #include "utilities/events.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1836 diff changeset	57 #include "utilities/stack.inline.hpp"
0 a61af66fc99e Initial load duke parents: diff changeset	58
a61af66fc99e Initial load duke parents: diff changeset	59 #include <math.h>
a61af66fc99e Initial load duke parents: diff changeset	60
a61af66fc99e Initial load duke parents: diff changeset	61 // All sizes are in HeapWords.
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	62 const size_t ParallelCompactData::Log2RegionSize = 9; // 512 words
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	63 const size_t ParallelCompactData::RegionSize = (size_t)1 << Log2RegionSize;
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	64 const size_t ParallelCompactData::RegionSizeBytes =
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	65 RegionSize << LogHeapWordSize;
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	66 const size_t ParallelCompactData::RegionSizeOffsetMask = RegionSize - 1;
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	67 const size_t ParallelCompactData::RegionAddrOffsetMask = RegionSizeBytes - 1;
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	68 const size_t ParallelCompactData::RegionAddrMask = ~RegionAddrOffsetMask;
0 a61af66fc99e Initial load duke parents: diff changeset	69
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	70 const ParallelCompactData::RegionData::region_sz_t
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	71 ParallelCompactData::RegionData::dc_shift = 27;
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	72
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	73 const ParallelCompactData::RegionData::region_sz_t
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	74 ParallelCompactData::RegionData::dc_mask = ~0U << dc_shift;
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	75
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	76 const ParallelCompactData::RegionData::region_sz_t
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	77 ParallelCompactData::RegionData::dc_one = 0x1U << dc_shift;
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	78
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	79 const ParallelCompactData::RegionData::region_sz_t
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	80 ParallelCompactData::RegionData::los_mask = ~dc_mask;
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	81
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	82 const ParallelCompactData::RegionData::region_sz_t
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	83 ParallelCompactData::RegionData::dc_claimed = 0x8U << dc_shift;
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	84
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	85 const ParallelCompactData::RegionData::region_sz_t
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	86 ParallelCompactData::RegionData::dc_completed = 0xcU << dc_shift;
0 a61af66fc99e Initial load duke parents: diff changeset	87
a61af66fc99e Initial load duke parents: diff changeset	88 SpaceInfo PSParallelCompact::_space_info[PSParallelCompact::last_space_id];
a61af66fc99e Initial load duke parents: diff changeset	89 bool PSParallelCompact::_print_phases = false;
a61af66fc99e Initial load duke parents: diff changeset	90
a61af66fc99e Initial load duke parents: diff changeset	91 ReferenceProcessor* PSParallelCompact::_ref_processor = NULL;
a61af66fc99e Initial load duke parents: diff changeset	92 klassOop PSParallelCompact::_updated_int_array_klass_obj = NULL;
a61af66fc99e Initial load duke parents: diff changeset	93
a61af66fc99e Initial load duke parents: diff changeset	94 double PSParallelCompact::_dwl_mean;
a61af66fc99e Initial load duke parents: diff changeset	95 double PSParallelCompact::_dwl_std_dev;
a61af66fc99e Initial load duke parents: diff changeset	96 double PSParallelCompact::_dwl_first_term;
a61af66fc99e Initial load duke parents: diff changeset	97 double PSParallelCompact::_dwl_adjustment;
a61af66fc99e Initial load duke parents: diff changeset	98 #ifdef ASSERT
a61af66fc99e Initial load duke parents: diff changeset	99 bool PSParallelCompact::_dwl_initialized = false;
a61af66fc99e Initial load duke parents: diff changeset	100 #endif // #ifdef ASSERT
a61af66fc99e Initial load duke parents: diff changeset	101
a61af66fc99e Initial load duke parents: diff changeset	102 #ifdef VALIDATE_MARK_SWEEP
113 ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 79 diff changeset	103 GrowableArray<void> PSParallelCompact::_root_refs_stack = NULL;
0 a61af66fc99e Initial load duke parents: diff changeset	104 GrowableArray<oop> * PSParallelCompact::_live_oops = NULL;
a61af66fc99e Initial load duke parents: diff changeset	105 GrowableArray<oop> * PSParallelCompact::_live_oops_moved_to = NULL;
a61af66fc99e Initial load duke parents: diff changeset	106 GrowableArray<size_t>* PSParallelCompact::_live_oops_size = NULL;
a61af66fc99e Initial load duke parents: diff changeset	107 size_t PSParallelCompact::_live_oops_index = 0;
a61af66fc99e Initial load duke parents: diff changeset	108 size_t PSParallelCompact::_live_oops_index_at_perm = 0;
113 ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 79 diff changeset	109 GrowableArray<void> PSParallelCompact::_other_refs_stack = NULL;
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 79 diff changeset	110 GrowableArray<void> PSParallelCompact::_adjusted_pointers = NULL;
0 a61af66fc99e Initial load duke parents: diff changeset	111 bool PSParallelCompact::_pointer_tracking = false;
a61af66fc99e Initial load duke parents: diff changeset	112 bool PSParallelCompact::_root_tracking = true;
a61af66fc99e Initial load duke parents: diff changeset	113
a61af66fc99e Initial load duke parents: diff changeset	114 GrowableArray<HeapWord> PSParallelCompact::_cur_gc_live_oops = NULL;
a61af66fc99e Initial load duke parents: diff changeset	115 GrowableArray<HeapWord> PSParallelCompact::_cur_gc_live_oops_moved_to = NULL;
a61af66fc99e Initial load duke parents: diff changeset	116 GrowableArray<size_t> * PSParallelCompact::_cur_gc_live_oops_size = NULL;
a61af66fc99e Initial load duke parents: diff changeset	117 GrowableArray<HeapWord> PSParallelCompact::_last_gc_live_oops = NULL;
a61af66fc99e Initial load duke parents: diff changeset	118 GrowableArray<HeapWord> PSParallelCompact::_last_gc_live_oops_moved_to = NULL;
a61af66fc99e Initial load duke parents: diff changeset	119 GrowableArray<size_t> * PSParallelCompact::_last_gc_live_oops_size = NULL;
a61af66fc99e Initial load duke parents: diff changeset	120 #endif
a61af66fc99e Initial load duke parents: diff changeset	121
482 7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	122 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	123 HeapWord* destination)
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	124 {
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	125 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	126 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	127 assert(destination != NULL, "invalid destination argument");
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	128
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	129 _src_region_idx = src_region_idx;
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	130 _partial_obj_size = partial_obj_size;
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	131 _destination = destination;
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	132
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	133 // 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	134 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	135 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	136
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	137 // 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	138 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	139 const ParallelCompactData& sd = PSParallelCompact::summary_data();
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	140 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	141 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	142
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	143 if (beg_region_addr == end_region_addr) {
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	144 // One destination region.
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	145 _destination_count = 1;
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	146 if (end_region_addr == destination) {
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	147 // 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	148 // 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	149 _dest_region_addr = end_region_addr;
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	150 _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	151 }
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	152 } else {
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	153 // 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	154 // 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	155 // 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	156 _destination_count = 2;
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	157 _dest_region_addr = end_region_addr;
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	158 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	159 assert(ofs < _partial_obj_size, "sanity");
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	160 _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	161 }
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	162 }
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	163
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	164 void SplitInfo::clear()
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	165 {
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	166 _src_region_idx = 0;
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	167 _partial_obj_size = 0;
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	168 _destination = NULL;
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	169 _destination_count = 0;
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	170 _dest_region_addr = NULL;
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	171 _first_src_addr = NULL;
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	172 assert(!is_valid(), "sanity");
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	173 }
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	174
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	175 #ifdef ASSERT
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	176 void SplitInfo::verify_clear()
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	177 {
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	178 assert(_src_region_idx == 0, "not clear");
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	179 assert(_partial_obj_size == 0, "not clear");
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	180 assert(_destination == NULL, "not clear");
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	181 assert(_destination_count == 0, "not clear");
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	182 assert(_dest_region_addr == NULL, "not clear");
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	183 assert(_first_src_addr == NULL, "not clear");
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	184 }
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	185 #endif // #ifdef ASSERT
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	186
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	187
0 a61af66fc99e Initial load duke parents: diff changeset	188 #ifndef PRODUCT
a61af66fc99e Initial load duke parents: diff changeset	189 const char* PSParallelCompact::space_names[] = {
a61af66fc99e Initial load duke parents: diff changeset	190 "perm", "old ", "eden", "from", "to "
a61af66fc99e Initial load duke parents: diff changeset	191 };
a61af66fc99e Initial load duke parents: diff changeset	192
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	193 void PSParallelCompact::print_region_ranges()
0 a61af66fc99e Initial load duke parents: diff changeset	194 {
a61af66fc99e Initial load duke parents: diff changeset	195 tty->print_cr("space bottom top end new_top");
a61af66fc99e Initial load duke parents: diff changeset	196 tty->print_cr("------ ---------- ---------- ---------- ----------");
a61af66fc99e Initial load duke parents: diff changeset	197
a61af66fc99e Initial load duke parents: diff changeset	198 for (unsigned int id = 0; id < last_space_id; ++id) {
a61af66fc99e Initial load duke parents: diff changeset	199 const MutableSpace* space = _space_info[id].space();
a61af66fc99e Initial load duke parents: diff changeset	200 tty->print_cr("%u %s "
264 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) " "
15dd2594d08e 6718283: existing uses of _FORMAT_W() were broken by 6521491 jcoomes* parents: 263 diff changeset	202 SIZE_FORMAT_W(10) " " SIZE_FORMAT_W(10) " ",
0 a61af66fc99e Initial load duke parents: diff changeset	203 id, space_names[id],
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	204 summary_data().addr_to_region_idx(space->bottom()),
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	205 summary_data().addr_to_region_idx(space->top()),
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	206 summary_data().addr_to_region_idx(space->end()),
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	207 summary_data().addr_to_region_idx(_space_info[id].new_top()));
0 a61af66fc99e Initial load duke parents: diff changeset	208 }
a61af66fc99e Initial load duke parents: diff changeset	209 }
a61af66fc99e Initial load duke parents: diff changeset	210
a61af66fc99e Initial load duke parents: diff changeset	211 void
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	212 print_generic_summary_region(size_t i, const ParallelCompactData::RegionData* c)
0 a61af66fc99e Initial load duke parents: diff changeset	213 {
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	214 #define REGION_IDX_FORMAT SIZE_FORMAT_W(7)
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	215 #define REGION_DATA_FORMAT SIZE_FORMAT_W(5)
0 a61af66fc99e Initial load duke parents: diff changeset	216
a61af66fc99e Initial load duke parents: diff changeset	217 ParallelCompactData& sd = PSParallelCompact::summary_data();
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	218 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	219 tty->print_cr(REGION_IDX_FORMAT " " PTR_FORMAT " "
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	220 REGION_IDX_FORMAT " " PTR_FORMAT " "
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	221 REGION_DATA_FORMAT " " REGION_DATA_FORMAT " "
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	222 REGION_DATA_FORMAT " " REGION_IDX_FORMAT " %d",
0 a61af66fc99e Initial load duke parents: diff changeset	223 i, c->data_location(), dci, c->destination(),
a61af66fc99e Initial load duke parents: diff changeset	224 c->partial_obj_size(), c->live_obj_size(),
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	225 c->data_size(), c->source_region(), c->destination_count());
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	226
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	227 #undef REGION_IDX_FORMAT
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	228 #undef REGION_DATA_FORMAT
0 a61af66fc99e Initial load duke parents: diff changeset	229 }
a61af66fc99e Initial load duke parents: diff changeset	230
a61af66fc99e Initial load duke parents: diff changeset	231 void
a61af66fc99e Initial load duke parents: diff changeset	232 print_generic_summary_data(ParallelCompactData& summary_data,
a61af66fc99e Initial load duke parents: diff changeset	233 HeapWord* const beg_addr,
a61af66fc99e Initial load duke parents: diff changeset	234 HeapWord* const end_addr)
a61af66fc99e Initial load duke parents: diff changeset	235 {
a61af66fc99e Initial load duke parents: diff changeset	236 size_t total_words = 0;
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	237 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	238 const size_t last = summary_data.addr_to_region_idx(end_addr);
0 a61af66fc99e Initial load duke parents: diff changeset	239 HeapWord* pdest = 0;
a61af66fc99e Initial load duke parents: diff changeset	240
a61af66fc99e Initial load duke parents: diff changeset	241 while (i <= last) {
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	242 ParallelCompactData::RegionData* c = summary_data.region(i);
0 a61af66fc99e Initial load duke parents: diff changeset	243 if (c->data_size() != 0 \|\| c->destination() != pdest) {
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	244 print_generic_summary_region(i, c);
0 a61af66fc99e Initial load duke parents: diff changeset	245 total_words += c->data_size();
a61af66fc99e Initial load duke parents: diff changeset	246 pdest = c->destination();
a61af66fc99e Initial load duke parents: diff changeset	247 }
a61af66fc99e Initial load duke parents: diff changeset	248 ++i;
a61af66fc99e Initial load duke parents: diff changeset	249 }
a61af66fc99e Initial load duke parents: diff changeset	250
a61af66fc99e Initial load duke parents: diff changeset	251 tty->print_cr("summary_data_bytes=" SIZE_FORMAT, total_words * HeapWordSize);
a61af66fc99e Initial load duke parents: diff changeset	252 }
a61af66fc99e Initial load duke parents: diff changeset	253
a61af66fc99e Initial load duke parents: diff changeset	254 void
a61af66fc99e Initial load duke parents: diff changeset	255 print_generic_summary_data(ParallelCompactData& summary_data,
a61af66fc99e Initial load duke parents: diff changeset	256 SpaceInfo* space_info)
a61af66fc99e Initial load duke parents: diff changeset	257 {
a61af66fc99e Initial load duke parents: diff changeset	258 for (unsigned int id = 0; id < PSParallelCompact::last_space_id; ++id) {
a61af66fc99e Initial load duke parents: diff changeset	259 const MutableSpace* space = space_info[id].space();
a61af66fc99e Initial load duke parents: diff changeset	260 print_generic_summary_data(summary_data, space->bottom(),
a61af66fc99e Initial load duke parents: diff changeset	261 MAX2(space->top(), space_info[id].new_top()));
a61af66fc99e Initial load duke parents: diff changeset	262 }
a61af66fc99e Initial load duke parents: diff changeset	263 }
a61af66fc99e Initial load duke parents: diff changeset	264
a61af66fc99e Initial load duke parents: diff changeset	265 void
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	266 print_initial_summary_region(size_t i,
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	267 const ParallelCompactData::RegionData* c,
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	268 bool newline = true)
0 a61af66fc99e Initial load duke parents: diff changeset	269 {
264 15dd2594d08e 6718283: existing uses of _FORMAT_W() were broken by 6521491 jcoomes* parents: 263 diff changeset	270 tty->print(SIZE_FORMAT_W(5) " " PTR_FORMAT " "
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) " "
15dd2594d08e 6718283: existing uses of _FORMAT_W() were broken by 6521491 jcoomes* parents: 263 diff changeset	272 SIZE_FORMAT_W(5) " " SIZE_FORMAT_W(5) " %d",
0 a61af66fc99e Initial load duke parents: diff changeset	273 i, c->destination(),
a61af66fc99e Initial load duke parents: diff changeset	274 c->partial_obj_size(), c->live_obj_size(),
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	275 c->data_size(), c->source_region(), c->destination_count());
0 a61af66fc99e Initial load duke parents: diff changeset	276 if (newline) tty->cr();
a61af66fc99e Initial load duke parents: diff changeset	277 }
a61af66fc99e Initial load duke parents: diff changeset	278
a61af66fc99e Initial load duke parents: diff changeset	279 void
a61af66fc99e Initial load duke parents: diff changeset	280 print_initial_summary_data(ParallelCompactData& summary_data,
a61af66fc99e Initial load duke parents: diff changeset	281 const MutableSpace* space) {
a61af66fc99e Initial load duke parents: diff changeset	282 if (space->top() == space->bottom()) {
a61af66fc99e Initial load duke parents: diff changeset	283 return;
a61af66fc99e Initial load duke parents: diff changeset	284 }
a61af66fc99e Initial load duke parents: diff changeset	285
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	286 const size_t region_size = ParallelCompactData::RegionSize;
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	287 typedef ParallelCompactData::RegionData RegionData;
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	288 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	289 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	290 const RegionData* c = summary_data.region(end_region - 1);
0 a61af66fc99e Initial load duke parents: diff changeset	291 HeapWord* end_addr = c->destination() + c->data_size();
a61af66fc99e Initial load duke parents: diff changeset	292 const size_t live_in_space = pointer_delta(end_addr, space->bottom());
a61af66fc99e Initial load duke parents: diff changeset	293
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	294 // 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	295 size_t full_region_count = 0;
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	296 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	297 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	298 print_initial_summary_region(i, summary_data.region(i));
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	299 ++full_region_count;
0 a61af66fc99e Initial load duke parents: diff changeset	300 ++i;
a61af66fc99e Initial load duke parents: diff changeset	301 }
a61af66fc99e Initial load duke parents: diff changeset	302
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	303 size_t live_to_right = live_in_space - full_region_count * region_size;
0 a61af66fc99e Initial load duke parents: diff changeset	304
a61af66fc99e Initial load duke parents: diff changeset	305 double max_reclaimed_ratio = 0.0;
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	306 size_t max_reclaimed_ratio_region = 0;
0 a61af66fc99e Initial load duke parents: diff changeset	307 size_t max_dead_to_right = 0;
a61af66fc99e Initial load duke parents: diff changeset	308 size_t max_live_to_right = 0;
a61af66fc99e Initial load duke parents: diff changeset	309
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	310 // 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	311 // the region or to the right of it. The remaining regions are empty (and
0 a61af66fc99e Initial load duke parents: diff changeset	312 // 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	313 while (i < end_region && live_to_right > 0) {
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	314 c = summary_data.region(i);
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	315 HeapWord* const region_addr = summary_data.region_to_addr(i);
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	316 const size_t used_to_right = pointer_delta(space->top(), region_addr);
0 a61af66fc99e Initial load duke parents: diff changeset	317 const size_t dead_to_right = used_to_right - live_to_right;
a61af66fc99e Initial load duke parents: diff changeset	318 const double reclaimed_ratio = double(dead_to_right) / live_to_right;
a61af66fc99e Initial load duke parents: diff changeset	319
a61af66fc99e Initial load duke parents: diff changeset	320 if (reclaimed_ratio > max_reclaimed_ratio) {
a61af66fc99e Initial load duke parents: diff changeset	321 max_reclaimed_ratio = reclaimed_ratio;
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	322 max_reclaimed_ratio_region = i;
0 a61af66fc99e Initial load duke parents: diff changeset	323 max_dead_to_right = dead_to_right;
a61af66fc99e Initial load duke parents: diff changeset	324 max_live_to_right = live_to_right;
a61af66fc99e Initial load duke parents: diff changeset	325 }
a61af66fc99e Initial load duke parents: diff changeset	326
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	327 print_initial_summary_region(i, c, false);
264 15dd2594d08e 6718283: existing uses of _FORMAT_W() were broken by 6521491 jcoomes* parents: 263 diff changeset	328 tty->print_cr(" %12.10f " SIZE_FORMAT_W(10) " " SIZE_FORMAT_W(10),
0 a61af66fc99e Initial load duke parents: diff changeset	329 reclaimed_ratio, dead_to_right, live_to_right);
a61af66fc99e Initial load duke parents: diff changeset	330
a61af66fc99e Initial load duke parents: diff changeset	331 live_to_right -= c->data_size();
a61af66fc99e Initial load duke parents: diff changeset	332 ++i;
a61af66fc99e Initial load duke parents: diff changeset	333 }
a61af66fc99e Initial load duke parents: diff changeset	334
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	335 // 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	336 if (i < end_region) {
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	337 print_initial_summary_region(i, summary_data.region(i));
0 a61af66fc99e Initial load duke parents: diff changeset	338 }
a61af66fc99e Initial load duke parents: diff changeset	339
264 15dd2594d08e 6718283: existing uses of _FORMAT_W() were broken by 6521491 jcoomes* parents: 263 diff changeset	340 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	341 "l2r=" SIZE_FORMAT_W(10) " max_ratio=%14.12f",
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	342 max_reclaimed_ratio_region, max_dead_to_right,
0 a61af66fc99e Initial load duke parents: diff changeset	343 max_live_to_right, max_reclaimed_ratio);
a61af66fc99e Initial load duke parents: diff changeset	344 }
a61af66fc99e Initial load duke parents: diff changeset	345
a61af66fc99e Initial load duke parents: diff changeset	346 void
a61af66fc99e Initial load duke parents: diff changeset	347 print_initial_summary_data(ParallelCompactData& summary_data,
a61af66fc99e Initial load duke parents: diff changeset	348 SpaceInfo* space_info) {
a61af66fc99e Initial load duke parents: diff changeset	349 unsigned int id = PSParallelCompact::perm_space_id;
a61af66fc99e Initial load duke parents: diff changeset	350 const MutableSpace* space;
a61af66fc99e Initial load duke parents: diff changeset	351 do {
a61af66fc99e Initial load duke parents: diff changeset	352 space = space_info[id].space();
a61af66fc99e Initial load duke parents: diff changeset	353 print_initial_summary_data(summary_data, space);
a61af66fc99e Initial load duke parents: diff changeset	354 } while (++id < PSParallelCompact::eden_space_id);
a61af66fc99e Initial load duke parents: diff changeset	355
a61af66fc99e Initial load duke parents: diff changeset	356 do {
a61af66fc99e Initial load duke parents: diff changeset	357 space = space_info[id].space();
a61af66fc99e Initial load duke parents: diff changeset	358 print_generic_summary_data(summary_data, space->bottom(), space->top());
a61af66fc99e Initial load duke parents: diff changeset	359 } while (++id < PSParallelCompact::last_space_id);
a61af66fc99e Initial load duke parents: diff changeset	360 }
a61af66fc99e Initial load duke parents: diff changeset	361 #endif // #ifndef PRODUCT
a61af66fc99e Initial load duke parents: diff changeset	362
a61af66fc99e Initial load duke parents: diff changeset	363 #ifdef ASSERT
a61af66fc99e Initial load duke parents: diff changeset	364 size_t add_obj_count;
a61af66fc99e Initial load duke parents: diff changeset	365 size_t add_obj_size;
a61af66fc99e Initial load duke parents: diff changeset	366 size_t mark_bitmap_count;
a61af66fc99e Initial load duke parents: diff changeset	367 size_t mark_bitmap_size;
a61af66fc99e Initial load duke parents: diff changeset	368 #endif // #ifdef ASSERT
a61af66fc99e Initial load duke parents: diff changeset	369
a61af66fc99e Initial load duke parents: diff changeset	370 ParallelCompactData::ParallelCompactData()
a61af66fc99e Initial load duke parents: diff changeset	371 {
a61af66fc99e Initial load duke parents: diff changeset	372 _region_start = 0;
a61af66fc99e Initial load duke parents: diff changeset	373
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	374 _region_vspace = 0;
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;
0 a61af66fc99e Initial load duke parents: diff changeset	377 }
a61af66fc99e Initial load duke parents: diff changeset	378
a61af66fc99e Initial load duke parents: diff changeset	379 bool ParallelCompactData::initialize(MemRegion covered_region)
a61af66fc99e Initial load duke parents: diff changeset	380 {
a61af66fc99e Initial load duke parents: diff changeset	381 _region_start = covered_region.start();
a61af66fc99e Initial load duke parents: diff changeset	382 const size_t region_size = covered_region.word_size();
a61af66fc99e Initial load duke parents: diff changeset	383 DEBUG_ONLY(_region_end = _region_start + region_size;)
a61af66fc99e Initial load duke parents: diff changeset	384
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	385 assert(region_align_down(_region_start) == _region_start,
0 a61af66fc99e Initial load duke parents: diff changeset	386 "region start not aligned");
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	387 assert((region_size & RegionSizeOffsetMask) == 0,
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	388 "region size not a multiple of RegionSize");
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	389
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	390 bool result = initialize_region_data(region_size);
0 a61af66fc99e Initial load duke parents: diff changeset	391
a61af66fc99e Initial load duke parents: diff changeset	392 return result;
a61af66fc99e Initial load duke parents: diff changeset	393 }
a61af66fc99e Initial load duke parents: diff changeset	394
a61af66fc99e Initial load duke parents: diff changeset	395 PSVirtualSpace*
a61af66fc99e Initial load duke parents: diff changeset	396 ParallelCompactData::create_vspace(size_t count, size_t element_size)
a61af66fc99e Initial load duke parents: diff changeset	397 {
a61af66fc99e Initial load duke parents: diff changeset	398 const size_t raw_bytes = count * element_size;
a61af66fc99e Initial load duke parents: diff changeset	399 const size_t page_sz = os::page_size_for_region(raw_bytes, raw_bytes, 10);
a61af66fc99e Initial load duke parents: diff changeset	400 const size_t granularity = os::vm_allocation_granularity();
a61af66fc99e Initial load duke parents: diff changeset	401 const size_t bytes = align_size_up(raw_bytes, MAX2(page_sz, granularity));
a61af66fc99e Initial load duke parents: diff changeset	402
a61af66fc99e Initial load duke parents: diff changeset	403 const size_t rs_align = page_sz == (size_t) os::vm_page_size() ? 0 :
a61af66fc99e Initial load duke parents: diff changeset	404 MAX2(page_sz, granularity);
79 82db0859acbe 6642862: Code cache allocation fails with large pages after 6588638 jcoomes parents: 0 diff changeset	405 ReservedSpace rs(bytes, rs_align, rs_align > 0);
0 a61af66fc99e Initial load duke parents: diff changeset	406 os::trace_page_sizes("par compact", raw_bytes, raw_bytes, page_sz, rs.base(),
a61af66fc99e Initial load duke parents: diff changeset	407 rs.size());
a61af66fc99e Initial load duke parents: diff changeset	408 PSVirtualSpace* vspace = new PSVirtualSpace(rs, page_sz);
a61af66fc99e Initial load duke parents: diff changeset	409 if (vspace != 0) {
a61af66fc99e Initial load duke parents: diff changeset	410 if (vspace->expand_by(bytes)) {
a61af66fc99e Initial load duke parents: diff changeset	411 return vspace;
a61af66fc99e Initial load duke parents: diff changeset	412 }
a61af66fc99e Initial load duke parents: diff changeset	413 delete vspace;
237 1fdb98a17101 6716785: implicit null checks not triggering with CompressedOops coleenp parents: 235 diff changeset	414 // Release memory reserved in the space.
1fdb98a17101 6716785: implicit null checks not triggering with CompressedOops coleenp parents: 235 diff changeset	415 rs.release();
0 a61af66fc99e Initial load duke parents: diff changeset	416 }
a61af66fc99e Initial load duke parents: diff changeset	417
a61af66fc99e Initial load duke parents: diff changeset	418 return 0;
a61af66fc99e Initial load duke parents: diff changeset	419 }
a61af66fc99e Initial load duke parents: diff changeset	420
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	421 bool ParallelCompactData::initialize_region_data(size_t region_size)
0 a61af66fc99e Initial load duke parents: diff changeset	422 {
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	423 const size_t count = (region_size + RegionSizeOffsetMask) >> Log2RegionSize;
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	424 _region_vspace = create_vspace(count, sizeof(RegionData));
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	425 if (_region_vspace != 0) {
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	426 _region_data = (RegionData*)_region_vspace->reserved_low_addr();
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	427 _region_count = count;
0 a61af66fc99e Initial load duke parents: diff changeset	428 return true;
a61af66fc99e Initial load duke parents: diff changeset	429 }
a61af66fc99e Initial load duke parents: diff changeset	430 return false;
a61af66fc99e Initial load duke parents: diff changeset	431 }
a61af66fc99e Initial load duke parents: diff changeset	432
a61af66fc99e Initial load duke parents: diff changeset	433 void ParallelCompactData::clear()
a61af66fc99e Initial load duke parents: diff changeset	434 {
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	435 memset(_region_data, 0, _region_vspace->committed_size());
0 a61af66fc99e Initial load duke parents: diff changeset	436 }
a61af66fc99e Initial load duke parents: diff changeset	437
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	438 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	439 assert(beg_region <= _region_count, "beg_region out of range");
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	440 assert(end_region <= _region_count, "end_region out of range");
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	441
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	442 const size_t region_cnt = end_region - beg_region;
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	443 memset(_region_data + beg_region, 0, region_cnt * sizeof(RegionData));
0 a61af66fc99e Initial load duke parents: diff changeset	444 }
a61af66fc99e Initial load duke parents: diff changeset	445
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	446 HeapWord* ParallelCompactData::partial_obj_end(size_t region_idx) const
0 a61af66fc99e Initial load duke parents: diff changeset	447 {
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	448 const RegionData* cur_cp = region(region_idx);
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	449 const RegionData* const end_cp = region(region_count() - 1);
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	450
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	451 HeapWord* result = region_to_addr(region_idx);
0 a61af66fc99e Initial load duke parents: diff changeset	452 if (cur_cp < end_cp) {
a61af66fc99e Initial load duke parents: diff changeset	453 do {
a61af66fc99e Initial load duke parents: diff changeset	454 result += cur_cp->partial_obj_size();
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	455 } while (cur_cp->partial_obj_size() == RegionSize && ++cur_cp < end_cp);
0 a61af66fc99e Initial load duke parents: diff changeset	456 }
a61af66fc99e Initial load duke parents: diff changeset	457 return result;
a61af66fc99e Initial load duke parents: diff changeset	458 }
a61af66fc99e Initial load duke parents: diff changeset	459
a61af66fc99e Initial load duke parents: diff changeset	460 void ParallelCompactData::add_obj(HeapWord* addr, size_t len)
a61af66fc99e Initial load duke parents: diff changeset	461 {
a61af66fc99e Initial load duke parents: diff changeset	462 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	463 const size_t beg_region = obj_ofs >> Log2RegionSize;
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	464 const size_t end_region = (obj_ofs + len - 1) >> Log2RegionSize;
0 a61af66fc99e Initial load duke parents: diff changeset	465
a61af66fc99e Initial load duke parents: diff changeset	466 DEBUG_ONLY(Atomic::inc_ptr(&add_obj_count);)
a61af66fc99e Initial load duke parents: diff changeset	467 DEBUG_ONLY(Atomic::add_ptr(len, &add_obj_size);)
a61af66fc99e Initial load duke parents: diff changeset	468
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	469 if (beg_region == end_region) {
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	470 // All in one region.
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	471 _region_data[beg_region].add_live_obj(len);
0 a61af66fc99e Initial load duke parents: diff changeset	472 return;
a61af66fc99e Initial load duke parents: diff changeset	473 }
a61af66fc99e Initial load duke parents: diff changeset	474
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	475 // First region.
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	476 const size_t beg_ofs = region_offset(addr);
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	477 _region_data[beg_region].add_live_obj(RegionSize - beg_ofs);
0 a61af66fc99e Initial load duke parents: diff changeset	478
a61af66fc99e Initial load duke parents: diff changeset	479 klassOop klass = ((oop)addr)->klass();
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	480 // Middle regions--completely spanned by this object.
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	481 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	482 _region_data[region].set_partial_obj_size(RegionSize);
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	483 _region_data[region].set_partial_obj_addr(addr);
0 a61af66fc99e Initial load duke parents: diff changeset	484 }
a61af66fc99e Initial load duke parents: diff changeset	485
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	486 // Last region.
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	487 const size_t end_ofs = region_offset(addr + len - 1);
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	488 _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	489 _region_data[end_region].set_partial_obj_addr(addr);
0 a61af66fc99e Initial load duke parents: diff changeset	490 }
a61af66fc99e Initial load duke parents: diff changeset	491
a61af66fc99e Initial load duke parents: diff changeset	492 void
a61af66fc99e Initial load duke parents: diff changeset	493 ParallelCompactData::summarize_dense_prefix(HeapWord* beg, HeapWord* end)
a61af66fc99e Initial load duke parents: diff changeset	494 {
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	495 assert(region_offset(beg) == 0, "not RegionSize aligned");
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	496 assert(region_offset(end) == 0, "not RegionSize aligned");
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	497
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	498 size_t cur_region = addr_to_region_idx(beg);
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	499 const size_t end_region = addr_to_region_idx(end);
0 a61af66fc99e Initial load duke parents: diff changeset	500 HeapWord* addr = beg;
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	501 while (cur_region < end_region) {
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	502 _region_data[cur_region].set_destination(addr);
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	503 _region_data[cur_region].set_destination_count(0);
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	504 _region_data[cur_region].set_source_region(cur_region);
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	505 _region_data[cur_region].set_data_location(addr);
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	506
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	507 // Update live_obj_size so the region appears completely full.
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	508 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	509 _region_data[cur_region].set_live_obj_size(live_size);
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	510
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	511 ++cur_region;
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	512 addr += RegionSize;
0 a61af66fc99e Initial load duke parents: diff changeset	513 }
a61af66fc99e Initial load duke parents: diff changeset	514 }
a61af66fc99e Initial load duke parents: diff changeset	515
482 7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	516 // 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	517 // split point.
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	518 //
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	519 // 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	520 // 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	521 // region (an "easy" split, no extra bookkeeping required).
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	522 //
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	523 // 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	524 // 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	525 // 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	526 // 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	527 // 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	528 // 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	529 // 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	530 // 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	531 // split).
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	532 HeapWord*
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	533 ParallelCompactData::summarize_split_space(size_t src_region,
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	534 SplitInfo& split_info,
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	535 HeapWord* destination,
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	536 HeapWord* target_end,
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	537 HeapWord** target_next)
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	538 {
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	539 assert(destination <= target_end, "sanity");
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	540 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	541 "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	542 assert(is_region_aligned(target_end), "sanity");
482 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 size_t split_region = src_region;
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	545 HeapWord* split_destination = destination;
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	546 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	547
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	548 if (destination + partial_obj_size > target_end) {
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	549 // 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	550 // 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	551 // destination space.
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	552 //
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	553 // 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	554 // region containing it.
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	555 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	556 split_region = addr_to_region_idx(overflow_obj);
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	557
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	558 // 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	559 // 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	560 // implies a region must be filled).
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	561 //
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	562 // 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	563 // 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	564 // 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	565 // object as opposed to just one field.)
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	566 //
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	567 // 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	568 // 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	569 //
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	570 // max(top, max(new_top, clear_top))
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	571 //
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	572 // 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	573 // to target_end.
482 7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	574 const RegionData* const sr = region(split_region);
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	575 const size_t beg_idx =
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	576 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	577 sr->partial_obj_size()));
696 f18338cf04b0 6810474: par compact - crash in summary_phase with very full heap jcoomes parents: 628 diff changeset	578 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	579
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	580 if (TraceParallelOldGCSummaryPhase) {
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	581 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	582 SIZE_FORMAT ", " SIZE_FORMAT ")",
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	583 beg_idx, end_idx);
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	584 }
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	585 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	586 _region_data[idx].set_source_region(0);
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	587 }
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	588
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	589 // 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	590 split_destination = sr->destination();
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	591 partial_obj_size = sr->partial_obj_size();
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	592 }
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	593
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	594 // 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	595 if (partial_obj_size != 0) {
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	596 _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	597 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	598 }
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	599
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	600 // Setup the continuation addresses.
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	601 *target_next = split_destination + partial_obj_size;
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	602 HeapWord* const source_next = region_to_addr(split_region) + partial_obj_size;
0 a61af66fc99e Initial load duke parents: diff changeset	603
a61af66fc99e Initial load duke parents: diff changeset	604 if (TraceParallelOldGCSummaryPhase) {
482 7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	605 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	606 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	607 " pos=" SIZE_FORMAT,
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	608 split_type, source_next, split_region,
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	609 partial_obj_size);
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	610 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	611 " tn=" PTR_FORMAT,
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	612 split_type, split_destination,
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	613 addr_to_region_idx(split_destination),
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	614 *target_next);
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	615
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	616 if (partial_obj_size != 0) {
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	617 HeapWord* const po_beg = split_info.destination();
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	618 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	619 gclog_or_tty->print_cr("%s split: "
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	620 "po_beg=" PTR_FORMAT " " SIZE_FORMAT " "
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	621 "po_end=" PTR_FORMAT " " SIZE_FORMAT,
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	622 split_type,
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	623 po_beg, addr_to_region_idx(po_beg),
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	624 po_end, addr_to_region_idx(po_end));
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	625 }
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	626 }
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	627
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	628 return source_next;
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	629 }
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	630
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	631 bool ParallelCompactData::summarize(SplitInfo& split_info,
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	632 HeapWord* source_beg, HeapWord* source_end,
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	633 HeapWord** source_next,
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	634 HeapWord* target_beg, HeapWord* target_end,
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	635 HeapWord** target_next)
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	636 {
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	637 if (TraceParallelOldGCSummaryPhase) {
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	638 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	639 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	640 "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	641 source_beg, source_end, source_next_val,
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	642 target_beg, target_end, *target_next);
0 a61af66fc99e Initial load duke parents: diff changeset	643 }
a61af66fc99e Initial load duke parents: diff changeset	644
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	645 size_t cur_region = addr_to_region_idx(source_beg);
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	646 const size_t end_region = addr_to_region_idx(region_align_up(source_end));
0 a61af66fc99e Initial load duke parents: diff changeset	647
a61af66fc99e Initial load duke parents: diff changeset	648 HeapWord *dest_addr = target_beg;
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	649 while (cur_region < end_region) {
482 7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	650 // 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	651 _region_data[cur_region].set_destination(dest_addr);
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	652
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	653 size_t words = _region_data[cur_region].data_size();
0 a61af66fc99e Initial load duke parents: diff changeset	654 if (words > 0) {
482 7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	655 // 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	656 // 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	657 // target space and the rest is copied elsewhere.
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	658 if (dest_addr + words > target_end) {
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	659 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	660 *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	661 target_end, target_next);
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	662 return false;
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	663 }
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	664
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	665 // 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	666 // 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	667 // 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	668 // destination region.
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	669 //
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	670 // 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	671 // 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	672 // 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	673 // available and can be claimed and then filled.
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	674 uint destination_count = 0;
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	675 if (split_info.is_split(cur_region)) {
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	676 // 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	677 // 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	678 // 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	679 // 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	680 // cross a destination region boundary.
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	681 destination_count = split_info.destination_count();
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	682 if (destination_count == 2) {
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	683 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	684 _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	685 }
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	686 }
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	687
0 a61af66fc99e Initial load duke parents: diff changeset	688 HeapWord* const last_addr = dest_addr + words - 1;
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	689 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	690 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	691
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	692 // Initially assume that the destination regions will be the same and
0 a61af66fc99e Initial load duke parents: diff changeset	693 // 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	694 // 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	695 // completely into itself.
482 7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	696 destination_count += cur_region == dest_region_2 ? 0 : 1;
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	697 if (dest_region_1 != dest_region_2) {
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	698 // Destination regions differ; adjust destination_count.
0 a61af66fc99e Initial load duke parents: diff changeset	699 destination_count += 1;
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	700 // 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	701 _region_data[dest_region_2].set_source_region(cur_region);
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	702 } else if (region_offset(dest_addr) == 0) {
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	703 // 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	704 // region.
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	705 _region_data[dest_region_1].set_source_region(cur_region);
0 a61af66fc99e Initial load duke parents: diff changeset	706 }
a61af66fc99e Initial load duke parents: diff changeset	707
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	708 _region_data[cur_region].set_destination_count(destination_count);
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	709 _region_data[cur_region].set_data_location(region_to_addr(cur_region));
0 a61af66fc99e Initial load duke parents: diff changeset	710 dest_addr += words;
a61af66fc99e Initial load duke parents: diff changeset	711 }
a61af66fc99e Initial load duke parents: diff changeset	712
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	713 ++cur_region;
0 a61af66fc99e Initial load duke parents: diff changeset	714 }
a61af66fc99e Initial load duke parents: diff changeset	715
a61af66fc99e Initial load duke parents: diff changeset	716 *target_next = dest_addr;
a61af66fc99e Initial load duke parents: diff changeset	717 return true;
a61af66fc99e Initial load duke parents: diff changeset	718 }
a61af66fc99e Initial load duke parents: diff changeset	719
a61af66fc99e Initial load duke parents: diff changeset	720 HeapWord* ParallelCompactData::calc_new_pointer(HeapWord* addr) {
a61af66fc99e Initial load duke parents: diff changeset	721 assert(addr != NULL, "Should detect NULL oop earlier");
a61af66fc99e Initial load duke parents: diff changeset	722 assert(PSParallelCompact::gc_heap()->is_in(addr), "addr not in heap");
a61af66fc99e Initial load duke parents: diff changeset	723 #ifdef ASSERT
a61af66fc99e Initial load duke parents: diff changeset	724 if (PSParallelCompact::mark_bitmap()->is_unmarked(addr)) {
a61af66fc99e Initial load duke parents: diff changeset	725 gclog_or_tty->print_cr("calc_new_pointer:: addr " PTR_FORMAT, addr);
a61af66fc99e Initial load duke parents: diff changeset	726 }
a61af66fc99e Initial load duke parents: diff changeset	727 #endif
a61af66fc99e Initial load duke parents: diff changeset	728 assert(PSParallelCompact::mark_bitmap()->is_marked(addr), "obj not marked");
a61af66fc99e Initial load duke parents: diff changeset	729
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	730 // Region covering the object.
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	731 size_t region_index = addr_to_region_idx(addr);
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	732 const RegionData* const region_ptr = region(region_index);
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	733 HeapWord* const region_addr = region_align_down(addr);
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	734
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	735 assert(addr < region_addr + RegionSize, "Region does not cover object");
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	736 assert(addr_to_region_ptr(region_addr) == region_ptr, "sanity check");
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	737
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	738 HeapWord* result = region_ptr->destination();
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	739
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	740 // If all the data in the region is live, then the new location of the object
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	741 // can be calculated from the destination of the region plus the offset of the
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	742 // object in the region.
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	743 if (region_ptr->data_size() == RegionSize) {
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	744 result += pointer_delta(addr, region_addr);
1571 2d127394260e 6916623: Align object to 16 bytes to use Compressed Oops with java heap up to 64Gb kvn parents: 1489 diff changeset	745 DEBUG_ONLY(PSParallelCompact::check_new_location(addr, result);)
0 a61af66fc99e Initial load duke parents: diff changeset	746 return result;
a61af66fc99e Initial load duke parents: diff changeset	747 }
a61af66fc99e Initial load duke parents: diff changeset	748
a61af66fc99e Initial load duke parents: diff changeset	749 // The new location of the object is
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	750 // region destination +
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	751 // size of the partial object extending onto the region +
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	752 // sizes of the live objects in the Region that are to the left of addr
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	753 const size_t partial_obj_size = region_ptr->partial_obj_size();
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	754 HeapWord* const search_start = region_addr + partial_obj_size;
0 a61af66fc99e Initial load duke parents: diff changeset	755
a61af66fc99e Initial load duke parents: diff changeset	756 const ParMarkBitMap* bitmap = PSParallelCompact::mark_bitmap();
a61af66fc99e Initial load duke parents: diff changeset	757 size_t live_to_left = bitmap->live_words_in_range(search_start, oop(addr));
a61af66fc99e Initial load duke parents: diff changeset	758
a61af66fc99e Initial load duke parents: diff changeset	759 result += partial_obj_size + live_to_left;
495 234c22e54b98 6784849: par compact - can fail when to_space is non-empty jcoomes parents: 483 diff changeset	760 DEBUG_ONLY(PSParallelCompact::check_new_location(addr, result);)
0 a61af66fc99e Initial load duke parents: diff changeset	761 return result;
a61af66fc99e Initial load duke parents: diff changeset	762 }
a61af66fc99e Initial load duke parents: diff changeset	763
a61af66fc99e Initial load duke parents: diff changeset	764 klassOop ParallelCompactData::calc_new_klass(klassOop old_klass) {
a61af66fc99e Initial load duke parents: diff changeset	765 klassOop updated_klass;
a61af66fc99e Initial load duke parents: diff changeset	766 if (PSParallelCompact::should_update_klass(old_klass)) {
a61af66fc99e Initial load duke parents: diff changeset	767 updated_klass = (klassOop) calc_new_pointer(old_klass);
a61af66fc99e Initial load duke parents: diff changeset	768 } else {
a61af66fc99e Initial load duke parents: diff changeset	769 updated_klass = old_klass;
a61af66fc99e Initial load duke parents: diff changeset	770 }
a61af66fc99e Initial load duke parents: diff changeset	771
a61af66fc99e Initial load duke parents: diff changeset	772 return updated_klass;
a61af66fc99e Initial load duke parents: diff changeset	773 }
a61af66fc99e Initial load duke parents: diff changeset	774
a61af66fc99e Initial load duke parents: diff changeset	775 #ifdef ASSERT
a61af66fc99e Initial load duke parents: diff changeset	776 void ParallelCompactData::verify_clear(const PSVirtualSpace* vspace)
a61af66fc99e Initial load duke parents: diff changeset	777 {
a61af66fc99e Initial load duke parents: diff changeset	778 const size_t* const beg = (const size_t*)vspace->committed_low_addr();
a61af66fc99e Initial load duke parents: diff changeset	779 const size_t* const end = (const size_t*)vspace->committed_high_addr();
a61af66fc99e Initial load duke parents: diff changeset	780 for (const size_t* p = beg; p < end; ++p) {
a61af66fc99e Initial load duke parents: diff changeset	781 assert(*p == 0, "not zero");
a61af66fc99e Initial load duke parents: diff changeset	782 }
a61af66fc99e Initial load duke parents: diff changeset	783 }
a61af66fc99e Initial load duke parents: diff changeset	784
a61af66fc99e Initial load duke parents: diff changeset	785 void ParallelCompactData::verify_clear()
a61af66fc99e Initial load duke parents: diff changeset	786 {
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	787 verify_clear(_region_vspace);
0 a61af66fc99e Initial load duke parents: diff changeset	788 }
a61af66fc99e Initial load duke parents: diff changeset	789 #endif // #ifdef ASSERT
a61af66fc99e Initial load duke parents: diff changeset	790
a61af66fc99e Initial load duke parents: diff changeset	791 #ifdef NOT_PRODUCT
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	792 ParallelCompactData::RegionData* debug_region(size_t region_index) {
0 a61af66fc99e Initial load duke parents: diff changeset	793 ParallelCompactData& sd = PSParallelCompact::summary_data();
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	794 return sd.region(region_index);
0 a61af66fc99e Initial load duke parents: diff changeset	795 }
a61af66fc99e Initial load duke parents: diff changeset	796 #endif
a61af66fc99e Initial load duke parents: diff changeset	797
a61af66fc99e Initial load duke parents: diff changeset	798 elapsedTimer PSParallelCompact::_accumulated_time;
a61af66fc99e Initial load duke parents: diff changeset	799 unsigned int PSParallelCompact::_total_invocations = 0;
a61af66fc99e Initial load duke parents: diff changeset	800 unsigned int PSParallelCompact::_maximum_compaction_gc_num = 0;
a61af66fc99e Initial load duke parents: diff changeset	801 jlong PSParallelCompact::_time_of_last_gc = 0;
a61af66fc99e Initial load duke parents: diff changeset	802 CollectorCounters* PSParallelCompact::_counters = NULL;
a61af66fc99e Initial load duke parents: diff changeset	803 ParMarkBitMap PSParallelCompact::_mark_bitmap;
a61af66fc99e Initial load duke parents: diff changeset	804 ParallelCompactData PSParallelCompact::_summary_data;
a61af66fc99e Initial load duke parents: diff changeset	805
a61af66fc99e Initial load duke parents: diff changeset	806 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	807
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 79 diff changeset	808 void PSParallelCompact::IsAliveClosure::do_object(oop p) { ShouldNotReachHere(); }
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 79 diff changeset	809 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	810
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 79 diff changeset	811 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	812 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	813
0 a61af66fc99e Initial load duke parents: diff changeset	814 PSParallelCompact::AdjustPointerClosure PSParallelCompact::_adjust_root_pointer_closure(true);
a61af66fc99e Initial load duke parents: diff changeset	815 PSParallelCompact::AdjustPointerClosure PSParallelCompact::_adjust_pointer_closure(false);
a61af66fc99e Initial load duke parents: diff changeset	816
113 ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 79 diff changeset	817 void PSParallelCompact::AdjustPointerClosure::do_oop(oop* p) { adjust_pointer(p, _is_root); }
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 79 diff changeset	818 void PSParallelCompact::AdjustPointerClosure::do_oop(narrowOop* p) { adjust_pointer(p, _is_root); }
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 79 diff changeset	819
1311 2a1472c30599 4396719: Mark Sweep stack overflow on deeply nested Object arrays jcoomes parents: 997 diff changeset	820 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	821
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 79 diff changeset	822 void PSParallelCompact::MarkAndPushClosure::do_oop(oop* p) { mark_and_push(_compaction_manager, p); }
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 79 diff changeset	823 void PSParallelCompact::MarkAndPushClosure::do_oop(narrowOop* p) { mark_and_push(_compaction_manager, p); }
0 a61af66fc99e Initial load duke parents: diff changeset	824
a61af66fc99e Initial load duke parents: diff changeset	825 void PSParallelCompact::post_initialize() {
a61af66fc99e Initial load duke parents: diff changeset	826 ParallelScavengeHeap* heap = gc_heap();
a61af66fc99e Initial load duke parents: diff changeset	827 assert(heap->kind() == CollectedHeap::ParallelScavengeHeap, "Sanity");
a61af66fc99e Initial load duke parents: diff changeset	828
a61af66fc99e Initial load duke parents: diff changeset	829 MemRegion mr = heap->reserved_region();
2369 92da084fefc9 6668573: CMS: reference processing crash if ParallelCMSThreads > ParallelGCThreads ysr parents: 2177 diff changeset	830 _ref_processor =
92da084fefc9 6668573: CMS: reference processing crash if ParallelCMSThreads > ParallelGCThreads ysr parents: 2177 diff changeset	831 new ReferenceProcessor(mr, // span
92da084fefc9 6668573: CMS: reference processing crash if ParallelCMSThreads > ParallelGCThreads ysr parents: 2177 diff changeset	832 ParallelRefProcEnabled && (ParallelGCThreads > 1), // mt processing
92da084fefc9 6668573: CMS: reference processing crash if ParallelCMSThreads > ParallelGCThreads ysr parents: 2177 diff changeset	833 (int) ParallelGCThreads, // mt processing degree
92da084fefc9 6668573: CMS: reference processing crash if ParallelCMSThreads > ParallelGCThreads ysr parents: 2177 diff changeset	834 true, // mt discovery
92da084fefc9 6668573: CMS: reference processing crash if ParallelCMSThreads > ParallelGCThreads ysr parents: 2177 diff changeset	835 (int) ParallelGCThreads, // mt discovery degree
92da084fefc9 6668573: CMS: reference processing crash if ParallelCMSThreads > ParallelGCThreads ysr parents: 2177 diff changeset	836 true, // atomic_discovery
92da084fefc9 6668573: CMS: reference processing crash if ParallelCMSThreads > ParallelGCThreads ysr parents: 2177 diff changeset	837 &_is_alive_closure, // non-header is alive closure
92da084fefc9 6668573: CMS: reference processing crash if ParallelCMSThreads > ParallelGCThreads ysr parents: 2177 diff changeset	838 false); // write barrier for next field updates
0 a61af66fc99e Initial load duke parents: diff changeset	839 _counters = new CollectorCounters("PSParallelCompact", 1);
a61af66fc99e Initial load duke parents: diff changeset	840
a61af66fc99e Initial load duke parents: diff changeset	841 // Initialize static fields in ParCompactionManager.
a61af66fc99e Initial load duke parents: diff changeset	842 ParCompactionManager::initialize(mark_bitmap());
a61af66fc99e Initial load duke parents: diff changeset	843 }
a61af66fc99e Initial load duke parents: diff changeset	844
a61af66fc99e Initial load duke parents: diff changeset	845 bool PSParallelCompact::initialize() {
a61af66fc99e Initial load duke parents: diff changeset	846 ParallelScavengeHeap* heap = gc_heap();
a61af66fc99e Initial load duke parents: diff changeset	847 assert(heap->kind() == CollectedHeap::ParallelScavengeHeap, "Sanity");
a61af66fc99e Initial load duke parents: diff changeset	848 MemRegion mr = heap->reserved_region();
a61af66fc99e Initial load duke parents: diff changeset	849
a61af66fc99e Initial load duke parents: diff changeset	850 // Was the old gen get allocated successfully?
a61af66fc99e Initial load duke parents: diff changeset	851 if (!heap->old_gen()->is_allocated()) {
a61af66fc99e Initial load duke parents: diff changeset	852 return false;
a61af66fc99e Initial load duke parents: diff changeset	853 }
a61af66fc99e Initial load duke parents: diff changeset	854
a61af66fc99e Initial load duke parents: diff changeset	855 initialize_space_info();
a61af66fc99e Initial load duke parents: diff changeset	856 initialize_dead_wood_limiter();
a61af66fc99e Initial load duke parents: diff changeset	857
a61af66fc99e Initial load duke parents: diff changeset	858 if (!_mark_bitmap.initialize(mr)) {
a61af66fc99e Initial load duke parents: diff changeset	859 vm_shutdown_during_initialization("Unable to allocate bit map for "
a61af66fc99e Initial load duke parents: diff changeset	860 "parallel garbage collection for the requested heap size.");
a61af66fc99e Initial load duke parents: diff changeset	861 return false;
a61af66fc99e Initial load duke parents: diff changeset	862 }
a61af66fc99e Initial load duke parents: diff changeset	863
a61af66fc99e Initial load duke parents: diff changeset	864 if (!_summary_data.initialize(mr)) {
a61af66fc99e Initial load duke parents: diff changeset	865 vm_shutdown_during_initialization("Unable to allocate tables for "
a61af66fc99e Initial load duke parents: diff changeset	866 "parallel garbage collection for the requested heap size.");
a61af66fc99e Initial load duke parents: diff changeset	867 return false;
a61af66fc99e Initial load duke parents: diff changeset	868 }
a61af66fc99e Initial load duke parents: diff changeset	869
a61af66fc99e Initial load duke parents: diff changeset	870 return true;
a61af66fc99e Initial load duke parents: diff changeset	871 }
a61af66fc99e Initial load duke parents: diff changeset	872
a61af66fc99e Initial load duke parents: diff changeset	873 void PSParallelCompact::initialize_space_info()
a61af66fc99e Initial load duke parents: diff changeset	874 {
a61af66fc99e Initial load duke parents: diff changeset	875 memset(&_space_info, 0, sizeof(_space_info));
a61af66fc99e Initial load duke parents: diff changeset	876
a61af66fc99e Initial load duke parents: diff changeset	877 ParallelScavengeHeap* heap = gc_heap();
a61af66fc99e Initial load duke parents: diff changeset	878 PSYoungGen* young_gen = heap->young_gen();
a61af66fc99e Initial load duke parents: diff changeset	879 MutableSpace* perm_space = heap->perm_gen()->object_space();
a61af66fc99e Initial load duke parents: diff changeset	880
a61af66fc99e Initial load duke parents: diff changeset	881 _space_info[perm_space_id].set_space(perm_space);
a61af66fc99e Initial load duke parents: diff changeset	882 _space_info[old_space_id].set_space(heap->old_gen()->object_space());
a61af66fc99e Initial load duke parents: diff changeset	883 _space_info[eden_space_id].set_space(young_gen->eden_space());
a61af66fc99e Initial load duke parents: diff changeset	884 _space_info[from_space_id].set_space(young_gen->from_space());
a61af66fc99e Initial load duke parents: diff changeset	885 _space_info[to_space_id].set_space(young_gen->to_space());
a61af66fc99e Initial load duke parents: diff changeset	886
a61af66fc99e Initial load duke parents: diff changeset	887 _space_info[perm_space_id].set_start_array(heap->perm_gen()->start_array());
a61af66fc99e Initial load duke parents: diff changeset	888 _space_info[old_space_id].set_start_array(heap->old_gen()->start_array());
a61af66fc99e Initial load duke parents: diff changeset	889
a61af66fc99e Initial load duke parents: diff changeset	890 _space_info[perm_space_id].set_min_dense_prefix(perm_space->top());
a61af66fc99e Initial load duke parents: diff changeset	891 if (TraceParallelOldGCDensePrefix) {
a61af66fc99e Initial load duke parents: diff changeset	892 tty->print_cr("perm min_dense_prefix=" PTR_FORMAT,
a61af66fc99e Initial load duke parents: diff changeset	893 _space_info[perm_space_id].min_dense_prefix());
a61af66fc99e Initial load duke parents: diff changeset	894 }
a61af66fc99e Initial load duke parents: diff changeset	895 }
a61af66fc99e Initial load duke parents: diff changeset	896
a61af66fc99e Initial load duke parents: diff changeset	897 void PSParallelCompact::initialize_dead_wood_limiter()
a61af66fc99e Initial load duke parents: diff changeset	898 {
a61af66fc99e Initial load duke parents: diff changeset	899 const size_t max = 100;
a61af66fc99e Initial load duke parents: diff changeset	900 _dwl_mean = double(MIN2(ParallelOldDeadWoodLimiterMean, max)) / 100.0;
a61af66fc99e Initial load duke parents: diff changeset	901 _dwl_std_dev = double(MIN2(ParallelOldDeadWoodLimiterStdDev, max)) / 100.0;
a61af66fc99e Initial load duke parents: diff changeset	902 _dwl_first_term = 1.0 / (sqrt(2.0 * M_PI) * _dwl_std_dev);
a61af66fc99e Initial load duke parents: diff changeset	903 DEBUG_ONLY(_dwl_initialized = true;)
a61af66fc99e Initial load duke parents: diff changeset	904 _dwl_adjustment = normal_distribution(1.0);
a61af66fc99e Initial load duke parents: diff changeset	905 }
a61af66fc99e Initial load duke parents: diff changeset	906
a61af66fc99e Initial load duke parents: diff changeset	907 // Simple class for storing info about the heap at the start of GC, to be used
a61af66fc99e Initial load duke parents: diff changeset	908 // after GC for comparison/printing.
a61af66fc99e Initial load duke parents: diff changeset	909 class PreGCValues {
a61af66fc99e Initial load duke parents: diff changeset	910 public:
a61af66fc99e Initial load duke parents: diff changeset	911 PreGCValues() { }
a61af66fc99e Initial load duke parents: diff changeset	912 PreGCValues(ParallelScavengeHeap* heap) { fill(heap); }
a61af66fc99e Initial load duke parents: diff changeset	913
a61af66fc99e Initial load duke parents: diff changeset	914 void fill(ParallelScavengeHeap* heap) {
a61af66fc99e Initial load duke parents: diff changeset	915 _heap_used = heap->used();
a61af66fc99e Initial load duke parents: diff changeset	916 _young_gen_used = heap->young_gen()->used_in_bytes();
a61af66fc99e Initial load duke parents: diff changeset	917 _old_gen_used = heap->old_gen()->used_in_bytes();
a61af66fc99e Initial load duke parents: diff changeset	918 _perm_gen_used = heap->perm_gen()->used_in_bytes();
a61af66fc99e Initial load duke parents: diff changeset	919 };
a61af66fc99e Initial load duke parents: diff changeset	920
a61af66fc99e Initial load duke parents: diff changeset	921 size_t heap_used() const { return _heap_used; }
a61af66fc99e Initial load duke parents: diff changeset	922 size_t young_gen_used() const { return _young_gen_used; }
a61af66fc99e Initial load duke parents: diff changeset	923 size_t old_gen_used() const { return _old_gen_used; }
a61af66fc99e Initial load duke parents: diff changeset	924 size_t perm_gen_used() const { return _perm_gen_used; }
a61af66fc99e Initial load duke parents: diff changeset	925
a61af66fc99e Initial load duke parents: diff changeset	926 private:
a61af66fc99e Initial load duke parents: diff changeset	927 size_t _heap_used;
a61af66fc99e Initial load duke parents: diff changeset	928 size_t _young_gen_used;
a61af66fc99e Initial load duke parents: diff changeset	929 size_t _old_gen_used;
a61af66fc99e Initial load duke parents: diff changeset	930 size_t _perm_gen_used;
a61af66fc99e Initial load duke parents: diff changeset	931 };
a61af66fc99e Initial load duke parents: diff changeset	932
a61af66fc99e Initial load duke parents: diff changeset	933 void
a61af66fc99e Initial load duke parents: diff changeset	934 PSParallelCompact::clear_data_covering_space(SpaceId id)
a61af66fc99e Initial load duke parents: diff changeset	935 {
a61af66fc99e Initial load duke parents: diff changeset	936 // At this point, top is the value before GC, new_top() is the value that will
a61af66fc99e Initial load duke parents: diff changeset	937 // be set at the end of GC. The marking bitmap is cleared to top; nothing
a61af66fc99e Initial load duke parents: diff changeset	938 // should be marked above top. The summary data is cleared to the larger of
a61af66fc99e Initial load duke parents: diff changeset	939 // top & new_top.
a61af66fc99e Initial load duke parents: diff changeset	940 MutableSpace* const space = _space_info[id].space();
a61af66fc99e Initial load duke parents: diff changeset	941 HeapWord* const bot = space->bottom();
a61af66fc99e Initial load duke parents: diff changeset	942 HeapWord* const top = space->top();
a61af66fc99e Initial load duke parents: diff changeset	943 HeapWord* const max_top = MAX2(top, _space_info[id].new_top());
a61af66fc99e Initial load duke parents: diff changeset	944
a61af66fc99e Initial load duke parents: diff changeset	945 const idx_t beg_bit = _mark_bitmap.addr_to_bit(bot);
a61af66fc99e Initial load duke parents: diff changeset	946 const idx_t end_bit = BitMap::word_align_up(_mark_bitmap.addr_to_bit(top));
a61af66fc99e Initial load duke parents: diff changeset	947 _mark_bitmap.clear_range(beg_bit, end_bit);
a61af66fc99e Initial load duke parents: diff changeset	948
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	949 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	950 const size_t end_region =
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	951 _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	952 _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	953
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	954 // Clear the data used to 'split' regions.
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	955 SplitInfo& split_info = _space_info[id].split_info();
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	956 if (split_info.is_valid()) {
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	957 split_info.clear();
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	958 }
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	959 DEBUG_ONLY(split_info.verify_clear();)
0 a61af66fc99e Initial load duke parents: diff changeset	960 }
a61af66fc99e Initial load duke parents: diff changeset	961
a61af66fc99e Initial load duke parents: diff changeset	962 void PSParallelCompact::pre_compact(PreGCValues* pre_gc_values)
a61af66fc99e Initial load duke parents: diff changeset	963 {
a61af66fc99e Initial load duke parents: diff changeset	964 // Update the from & to space pointers in space_info, since they are swapped
a61af66fc99e Initial load duke parents: diff changeset	965 // at each young gen gc. Do the update unconditionally (even though a
a61af66fc99e Initial load duke parents: diff changeset	966 // promotion failure does not swap spaces) because an unknown number of minor
a61af66fc99e Initial load duke parents: diff changeset	967 // collections will have swapped the spaces an unknown number of times.
a61af66fc99e Initial load duke parents: diff changeset	968 TraceTime tm("pre compact", print_phases(), true, gclog_or_tty);
a61af66fc99e Initial load duke parents: diff changeset	969 ParallelScavengeHeap* heap = gc_heap();
a61af66fc99e Initial load duke parents: diff changeset	970 _space_info[from_space_id].set_space(heap->young_gen()->from_space());
a61af66fc99e Initial load duke parents: diff changeset	971 _space_info[to_space_id].set_space(heap->young_gen()->to_space());
a61af66fc99e Initial load duke parents: diff changeset	972
a61af66fc99e Initial load duke parents: diff changeset	973 pre_gc_values->fill(heap);
a61af66fc99e Initial load duke parents: diff changeset	974
a61af66fc99e Initial load duke parents: diff changeset	975 ParCompactionManager::reset();
a61af66fc99e Initial load duke parents: diff changeset	976 NOT_PRODUCT(_mark_bitmap.reset_counters());
a61af66fc99e Initial load duke parents: diff changeset	977 DEBUG_ONLY(add_obj_count = add_obj_size = 0;)
a61af66fc99e Initial load duke parents: diff changeset	978 DEBUG_ONLY(mark_bitmap_count = mark_bitmap_size = 0;)
a61af66fc99e Initial load duke parents: diff changeset	979
a61af66fc99e Initial load duke parents: diff changeset	980 // 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	981 heap->increment_total_collections(true);
0 a61af66fc99e Initial load duke parents: diff changeset	982
a61af66fc99e Initial load duke parents: diff changeset	983 // We need to track unique mark sweep invocations as well.
a61af66fc99e Initial load duke parents: diff changeset	984 _total_invocations++;
a61af66fc99e Initial load duke parents: diff changeset	985
a61af66fc99e Initial load duke parents: diff changeset	986 if (PrintHeapAtGC) {
a61af66fc99e Initial load duke parents: diff changeset	987 Universe::print_heap_before_gc();
a61af66fc99e Initial load duke parents: diff changeset	988 }
a61af66fc99e Initial load duke parents: diff changeset	989
a61af66fc99e Initial load duke parents: diff changeset	990 // Fill in TLABs
a61af66fc99e Initial load duke parents: diff changeset	991 heap->accumulate_statistics_all_tlabs();
a61af66fc99e Initial load duke parents: diff changeset	992 heap->ensure_parsability(true); // retire TLABs
a61af66fc99e Initial load duke parents: diff changeset	993
a61af66fc99e Initial load duke parents: diff changeset	994 if (VerifyBeforeGC && heap->total_collections() >= VerifyGCStartAt) {
a61af66fc99e Initial load duke parents: diff changeset	995 HandleMark hm; // Discard invalid handles created during verification
a61af66fc99e Initial load duke parents: diff changeset	996 gclog_or_tty->print(" VerifyBeforeGC:");
a61af66fc99e Initial load duke parents: diff changeset	997 Universe::verify(true);
a61af66fc99e Initial load duke parents: diff changeset	998 }
a61af66fc99e Initial load duke parents: diff changeset	999
a61af66fc99e Initial load duke parents: diff changeset	1000 // Verify object start arrays
a61af66fc99e Initial load duke parents: diff changeset	1001 if (VerifyObjectStartArray &&
a61af66fc99e Initial load duke parents: diff changeset	1002 VerifyBeforeGC) {
a61af66fc99e Initial load duke parents: diff changeset	1003 heap->old_gen()->verify_object_start_array();
a61af66fc99e Initial load duke parents: diff changeset	1004 heap->perm_gen()->verify_object_start_array();
a61af66fc99e Initial load duke parents: diff changeset	1005 }
a61af66fc99e Initial load duke parents: diff changeset	1006
a61af66fc99e Initial load duke parents: diff changeset	1007 DEBUG_ONLY(mark_bitmap()->verify_clear();)
a61af66fc99e Initial load duke parents: diff changeset	1008 DEBUG_ONLY(summary_data().verify_clear();)
210 05712c37c828 6676016: ParallelOldGC leaks memory jcoomes parents: 142 diff changeset	1009
05712c37c828 6676016: ParallelOldGC leaks memory jcoomes parents: 142 diff changeset	1010 // Have worker threads release resources the next time they run a task.
05712c37c828 6676016: ParallelOldGC leaks memory jcoomes parents: 142 diff changeset	1011 gc_task_manager()->release_all_resources();
0 a61af66fc99e Initial load duke parents: diff changeset	1012 }
a61af66fc99e Initial load duke parents: diff changeset	1013
a61af66fc99e Initial load duke parents: diff changeset	1014 void PSParallelCompact::post_compact()
a61af66fc99e Initial load duke parents: diff changeset	1015 {
a61af66fc99e Initial load duke parents: diff changeset	1016 TraceTime tm("post compact", print_phases(), true, gclog_or_tty);
a61af66fc99e Initial load duke parents: diff changeset	1017
a61af66fc99e Initial load duke parents: diff changeset	1018 for (unsigned int id = perm_space_id; id < last_space_id; ++id) {
482 7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1019 // Clear the marking bitmap, summary data and split info.
0 a61af66fc99e Initial load duke parents: diff changeset	1020 clear_data_covering_space(SpaceId(id));
482 7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1021 // 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	1022 _space_info[id].publish_new_top();
0 a61af66fc99e Initial load duke parents: diff changeset	1023 }
a61af66fc99e Initial load duke parents: diff changeset	1024
a61af66fc99e Initial load duke parents: diff changeset	1025 MutableSpace* const eden_space = _space_info[eden_space_id].space();
a61af66fc99e Initial load duke parents: diff changeset	1026 MutableSpace* const from_space = _space_info[from_space_id].space();
a61af66fc99e Initial load duke parents: diff changeset	1027 MutableSpace* const to_space = _space_info[to_space_id].space();
a61af66fc99e Initial load duke parents: diff changeset	1028
a61af66fc99e Initial load duke parents: diff changeset	1029 ParallelScavengeHeap* heap = gc_heap();
a61af66fc99e Initial load duke parents: diff changeset	1030 bool eden_empty = eden_space->is_empty();
a61af66fc99e Initial load duke parents: diff changeset	1031 if (!eden_empty) {
a61af66fc99e Initial load duke parents: diff changeset	1032 eden_empty = absorb_live_data_from_eden(heap->size_policy(),
a61af66fc99e Initial load duke parents: diff changeset	1033 heap->young_gen(), heap->old_gen());
a61af66fc99e Initial load duke parents: diff changeset	1034 }
a61af66fc99e Initial load duke parents: diff changeset	1035
a61af66fc99e Initial load duke parents: diff changeset	1036 // Update heap occupancy information which is used as input to the soft ref
a61af66fc99e Initial load duke parents: diff changeset	1037 // clearing policy at the next gc.
a61af66fc99e Initial load duke parents: diff changeset	1038 Universe::update_heap_info_at_gc();
a61af66fc99e Initial load duke parents: diff changeset	1039
a61af66fc99e Initial load duke parents: diff changeset	1040 bool young_gen_empty = eden_empty && from_space->is_empty() &&
a61af66fc99e Initial load duke parents: diff changeset	1041 to_space->is_empty();
a61af66fc99e Initial load duke parents: diff changeset	1042
a61af66fc99e Initial load duke parents: diff changeset	1043 BarrierSet* bs = heap->barrier_set();
a61af66fc99e Initial load duke parents: diff changeset	1044 if (bs->is_a(BarrierSet::ModRef)) {
a61af66fc99e Initial load duke parents: diff changeset	1045 ModRefBarrierSet* modBS = (ModRefBarrierSet*)bs;
a61af66fc99e Initial load duke parents: diff changeset	1046 MemRegion old_mr = heap->old_gen()->reserved();
a61af66fc99e Initial load duke parents: diff changeset	1047 MemRegion perm_mr = heap->perm_gen()->reserved();
a61af66fc99e Initial load duke parents: diff changeset	1048 assert(perm_mr.end() <= old_mr.start(), "Generations out of order");
a61af66fc99e Initial load duke parents: diff changeset	1049
a61af66fc99e Initial load duke parents: diff changeset	1050 if (young_gen_empty) {
a61af66fc99e Initial load duke parents: diff changeset	1051 modBS->clear(MemRegion(perm_mr.start(), old_mr.end()));
a61af66fc99e Initial load duke parents: diff changeset	1052 } else {
a61af66fc99e Initial load duke parents: diff changeset	1053 modBS->invalidate(MemRegion(perm_mr.start(), old_mr.end()));
a61af66fc99e Initial load duke parents: diff changeset	1054 }
a61af66fc99e Initial load duke parents: diff changeset	1055 }
a61af66fc99e Initial load duke parents: diff changeset	1056
a61af66fc99e Initial load duke parents: diff changeset	1057 Threads::gc_epilogue();
a61af66fc99e Initial load duke parents: diff changeset	1058 CodeCache::gc_epilogue();
2147 9afee0b9fc1d 7012505: BreakpointWithFullGC.sh fails with Internal Error (src/share/vm/oops/methodOop.cpp:220) kamg parents: 1972 diff changeset	1059 JvmtiExport::gc_epilogue();
0 a61af66fc99e Initial load duke parents: diff changeset	1060
a61af66fc99e Initial load duke parents: diff changeset	1061 COMPILER2_PRESENT(DerivedPointerTable::update_pointers());
a61af66fc99e Initial load duke parents: diff changeset	1062
a61af66fc99e Initial load duke parents: diff changeset	1063 ref_processor()->enqueue_discovered_references(NULL);
a61af66fc99e Initial load duke parents: diff changeset	1064
263 12eea04c8b06 6672698: mangle_unused_area() should not remangle the entire heap at each collection. jmasa parents: 210 diff changeset	1065 if (ZapUnusedHeapArea) {
12eea04c8b06 6672698: mangle_unused_area() should not remangle the entire heap at each collection. jmasa parents: 210 diff changeset	1066 heap->gen_mangle_unused_area();
12eea04c8b06 6672698: mangle_unused_area() should not remangle the entire heap at each collection. jmasa parents: 210 diff changeset	1067 }
12eea04c8b06 6672698: mangle_unused_area() should not remangle the entire heap at each collection. jmasa parents: 210 diff changeset	1068
0 a61af66fc99e Initial load duke parents: diff changeset	1069 // Update time of last GC
a61af66fc99e Initial load duke parents: diff changeset	1070 reset_millis_since_last_gc();
a61af66fc99e Initial load duke parents: diff changeset	1071 }
a61af66fc99e Initial load duke parents: diff changeset	1072
a61af66fc99e Initial load duke parents: diff changeset	1073 HeapWord*
a61af66fc99e Initial load duke parents: diff changeset	1074 PSParallelCompact::compute_dense_prefix_via_density(const SpaceId id,
a61af66fc99e Initial load duke parents: diff changeset	1075 bool maximum_compaction)
a61af66fc99e Initial load duke parents: diff changeset	1076 {
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1077 const size_t region_size = ParallelCompactData::RegionSize;
0 a61af66fc99e Initial load duke parents: diff changeset	1078 const ParallelCompactData& sd = summary_data();
a61af66fc99e Initial load duke parents: diff changeset	1079
a61af66fc99e Initial load duke parents: diff changeset	1080 const MutableSpace* const space = _space_info[id].space();
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1081 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	1082 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	1083 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	1084
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1085 // Skip full regions at the beginning of the space--they are necessarily part
0 a61af66fc99e Initial load duke parents: diff changeset	1086 // of the dense prefix.
a61af66fc99e Initial load duke parents: diff changeset	1087 size_t full_count = 0;
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1088 const RegionData* cp;
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1089 for (cp = beg_cp; cp < end_cp && cp->data_size() == region_size; ++cp) {
0 a61af66fc99e Initial load duke parents: diff changeset	1090 ++full_count;
a61af66fc99e Initial load duke parents: diff changeset	1091 }
a61af66fc99e Initial load duke parents: diff changeset	1092
a61af66fc99e Initial load duke parents: diff changeset	1093 assert(total_invocations() >= _maximum_compaction_gc_num, "sanity");
a61af66fc99e Initial load duke parents: diff changeset	1094 const size_t gcs_since_max = total_invocations() - _maximum_compaction_gc_num;
a61af66fc99e Initial load duke parents: diff changeset	1095 const bool interval_ended = gcs_since_max > HeapMaximumCompactionInterval;
a61af66fc99e Initial load duke parents: diff changeset	1096 if (maximum_compaction \|\| cp == end_cp \|\| interval_ended) {
a61af66fc99e Initial load duke parents: diff changeset	1097 _maximum_compaction_gc_num = total_invocations();
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1098 return sd.region_to_addr(cp);
0 a61af66fc99e Initial load duke parents: diff changeset	1099 }
a61af66fc99e Initial load duke parents: diff changeset	1100
a61af66fc99e Initial load duke parents: diff changeset	1101 HeapWord* const new_top = _space_info[id].new_top();
a61af66fc99e Initial load duke parents: diff changeset	1102 const size_t space_live = pointer_delta(new_top, space->bottom());
a61af66fc99e Initial load duke parents: diff changeset	1103 const size_t space_used = space->used_in_words();
a61af66fc99e Initial load duke parents: diff changeset	1104 const size_t space_capacity = space->capacity_in_words();
a61af66fc99e Initial load duke parents: diff changeset	1105
a61af66fc99e Initial load duke parents: diff changeset	1106 const double cur_density = double(space_live) / space_capacity;
a61af66fc99e Initial load duke parents: diff changeset	1107 const double deadwood_density =
a61af66fc99e Initial load duke parents: diff changeset	1108 (1.0 - cur_density) * (1.0 - cur_density) * cur_density * cur_density;
a61af66fc99e Initial load duke parents: diff changeset	1109 const size_t deadwood_goal = size_t(space_capacity * deadwood_density);
a61af66fc99e Initial load duke parents: diff changeset	1110
a61af66fc99e Initial load duke parents: diff changeset	1111 if (TraceParallelOldGCDensePrefix) {
a61af66fc99e Initial load duke parents: diff changeset	1112 tty->print_cr("cur_dens=%5.3f dw_dens=%5.3f dw_goal=" SIZE_FORMAT,
a61af66fc99e Initial load duke parents: diff changeset	1113 cur_density, deadwood_density, deadwood_goal);
a61af66fc99e Initial load duke parents: diff changeset	1114 tty->print_cr("space_live=" SIZE_FORMAT " " "space_used=" SIZE_FORMAT " "
a61af66fc99e Initial load duke parents: diff changeset	1115 "space_cap=" SIZE_FORMAT,
a61af66fc99e Initial load duke parents: diff changeset	1116 space_live, space_used,
a61af66fc99e Initial load duke parents: diff changeset	1117 space_capacity);
a61af66fc99e Initial load duke parents: diff changeset	1118 }
a61af66fc99e Initial load duke parents: diff changeset	1119
a61af66fc99e Initial load duke parents: diff changeset	1120 // XXX - Use binary search?
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1121 HeapWord* dense_prefix = sd.region_to_addr(cp);
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1122 const RegionData* full_cp = cp;
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1123 const RegionData* const top_cp = sd.addr_to_region_ptr(space->top() - 1);
0 a61af66fc99e Initial load duke parents: diff changeset	1124 while (cp < end_cp) {
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1125 HeapWord* region_destination = cp->destination();
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1126 const size_t cur_deadwood = pointer_delta(dense_prefix, region_destination);
0 a61af66fc99e Initial load duke parents: diff changeset	1127 if (TraceParallelOldGCDensePrefix && Verbose) {
264 15dd2594d08e 6718283: existing uses of _FORMAT_W() were broken by 6521491 jcoomes* parents: 263 diff changeset	1128 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	1129 "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	1130 sd.region(cp), region_destination,
0 a61af66fc99e Initial load duke parents: diff changeset	1131 dense_prefix, cur_deadwood);
a61af66fc99e Initial load duke parents: diff changeset	1132 }
a61af66fc99e Initial load duke parents: diff changeset	1133
a61af66fc99e Initial load duke parents: diff changeset	1134 if (cur_deadwood >= deadwood_goal) {
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1135 // 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	1136 // 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	1137 // iterate backwards over those sparse regions, looking for the region
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1138 // 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	1139 size_t space_to_left = sd.region(cp) * region_size;
0 a61af66fc99e Initial load duke parents: diff changeset	1140 size_t live_to_left = space_to_left - cur_deadwood;
a61af66fc99e Initial load duke parents: diff changeset	1141 size_t space_to_right = space_capacity - space_to_left;
a61af66fc99e Initial load duke parents: diff changeset	1142 size_t live_to_right = space_live - live_to_left;
a61af66fc99e Initial load duke parents: diff changeset	1143 double density_to_right = double(live_to_right) / space_to_right;
a61af66fc99e Initial load duke parents: diff changeset	1144 while (cp > full_cp) {
a61af66fc99e Initial load duke parents: diff changeset	1145 --cp;
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1146 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	1147 cp->data_size();
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1148 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	1149 double prev_region_density_to_right =
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1150 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	1151 if (density_to_right <= prev_region_density_to_right) {
0 a61af66fc99e Initial load duke parents: diff changeset	1152 return dense_prefix;
a61af66fc99e Initial load duke parents: diff changeset	1153 }
a61af66fc99e Initial load duke parents: diff changeset	1154 if (TraceParallelOldGCDensePrefix && Verbose) {
264 15dd2594d08e 6718283: existing uses of _FORMAT_W() were broken by 6521491 jcoomes* parents: 263 diff changeset	1155 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	1156 "pc_d2r=%10.8f", sd.region(cp), density_to_right,
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1157 prev_region_density_to_right);
0 a61af66fc99e Initial load duke parents: diff changeset	1158 }
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1159 dense_prefix -= region_size;
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1160 live_to_right = prev_region_live_to_right;
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1161 space_to_right = prev_region_space_to_right;
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1162 density_to_right = prev_region_density_to_right;
0 a61af66fc99e Initial load duke parents: diff changeset	1163 }
a61af66fc99e Initial load duke parents: diff changeset	1164 return dense_prefix;
a61af66fc99e Initial load duke parents: diff changeset	1165 }
a61af66fc99e Initial load duke parents: diff changeset	1166
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1167 dense_prefix += region_size;
0 a61af66fc99e Initial load duke parents: diff changeset	1168 ++cp;
a61af66fc99e Initial load duke parents: diff changeset	1169 }
a61af66fc99e Initial load duke parents: diff changeset	1170
a61af66fc99e Initial load duke parents: diff changeset	1171 return dense_prefix;
a61af66fc99e Initial load duke parents: diff changeset	1172 }
a61af66fc99e Initial load duke parents: diff changeset	1173
a61af66fc99e Initial load duke parents: diff changeset	1174 #ifndef PRODUCT
a61af66fc99e Initial load duke parents: diff changeset	1175 void PSParallelCompact::print_dense_prefix_stats(const char* const algorithm,
a61af66fc99e Initial load duke parents: diff changeset	1176 const SpaceId id,
a61af66fc99e Initial load duke parents: diff changeset	1177 const bool maximum_compaction,
a61af66fc99e Initial load duke parents: diff changeset	1178 HeapWord* const addr)
a61af66fc99e Initial load duke parents: diff changeset	1179 {
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1180 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	1181 RegionData* const cp = summary_data().region(region_idx);
0 a61af66fc99e Initial load duke parents: diff changeset	1182 const MutableSpace* const space = _space_info[id].space();
a61af66fc99e Initial load duke parents: diff changeset	1183 HeapWord* const new_top = _space_info[id].new_top();
a61af66fc99e Initial load duke parents: diff changeset	1184
a61af66fc99e Initial load duke parents: diff changeset	1185 const size_t space_live = pointer_delta(new_top, space->bottom());
a61af66fc99e Initial load duke parents: diff changeset	1186 const size_t dead_to_left = pointer_delta(addr, cp->destination());
a61af66fc99e Initial load duke parents: diff changeset	1187 const size_t space_cap = space->capacity_in_words();
a61af66fc99e Initial load duke parents: diff changeset	1188 const double dead_to_left_pct = double(dead_to_left) / space_cap;
a61af66fc99e Initial load duke parents: diff changeset	1189 const size_t live_to_right = new_top - cp->destination();
a61af66fc99e Initial load duke parents: diff changeset	1190 const size_t dead_to_right = space->top() - addr - live_to_right;
a61af66fc99e Initial load duke parents: diff changeset	1191
264 15dd2594d08e 6718283: existing uses of _FORMAT_W() were broken by 6521491 jcoomes* parents: 263 diff changeset	1192 tty->print_cr("%s=" PTR_FORMAT " dpc=" SIZE_FORMAT_W(5) " "
0 a61af66fc99e Initial load duke parents: diff changeset	1193 "spl=" SIZE_FORMAT " "
a61af66fc99e Initial load duke parents: diff changeset	1194 "d2l=" SIZE_FORMAT " d2l%%=%6.4f "
a61af66fc99e Initial load duke parents: diff changeset	1195 "d2r=" SIZE_FORMAT " l2r=" SIZE_FORMAT
a61af66fc99e Initial load duke parents: diff changeset	1196 " ratio=%10.8f",
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1197 algorithm, addr, region_idx,
0 a61af66fc99e Initial load duke parents: diff changeset	1198 space_live,
a61af66fc99e Initial load duke parents: diff changeset	1199 dead_to_left, dead_to_left_pct,
a61af66fc99e Initial load duke parents: diff changeset	1200 dead_to_right, live_to_right,
a61af66fc99e Initial load duke parents: diff changeset	1201 double(dead_to_right) / live_to_right);
a61af66fc99e Initial load duke parents: diff changeset	1202 }
a61af66fc99e Initial load duke parents: diff changeset	1203 #endif // #ifndef PRODUCT
a61af66fc99e Initial load duke parents: diff changeset	1204
a61af66fc99e Initial load duke parents: diff changeset	1205 // Return a fraction indicating how much of the generation can be treated as
a61af66fc99e Initial load duke parents: diff changeset	1206 // "dead wood" (i.e., not reclaimed). The function uses a normal distribution
a61af66fc99e Initial load duke parents: diff changeset	1207 // based on the density of live objects in the generation to determine a limit,
a61af66fc99e Initial load duke parents: diff changeset	1208 // which is then adjusted so the return value is min_percent when the density is
a61af66fc99e Initial load duke parents: diff changeset	1209 // 1.
a61af66fc99e Initial load duke parents: diff changeset	1210 //
a61af66fc99e Initial load duke parents: diff changeset	1211 // The following table shows some return values for a different values of the
a61af66fc99e Initial load duke parents: diff changeset	1212 // standard deviation (ParallelOldDeadWoodLimiterStdDev); the mean is 0.5 and
a61af66fc99e Initial load duke parents: diff changeset	1213 // min_percent is 1.
a61af66fc99e Initial load duke parents: diff changeset	1214 //
a61af66fc99e Initial load duke parents: diff changeset	1215 // fraction allowed as dead wood
a61af66fc99e Initial load duke parents: diff changeset	1216 // -----------------------------------------------------------------
a61af66fc99e Initial load duke parents: diff changeset	1217 // 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	1218 // ------- ---------- ---------- ---------- ---------- ---------- ----------
a61af66fc99e Initial load duke parents: diff changeset	1219 // 0.00000 0.01000000 0.01000000 0.01000000 0.01000000 0.01000000 0.01000000
a61af66fc99e Initial load duke parents: diff changeset	1220 // 0.05000 0.03193096 0.02836880 0.02550828 0.02319280 0.02130337 0.01974941
a61af66fc99e Initial load duke parents: diff changeset	1221 // 0.10000 0.05247504 0.04547452 0.03988045 0.03537016 0.03170171 0.02869272
a61af66fc99e Initial load duke parents: diff changeset	1222 // 0.15000 0.07135702 0.06111390 0.05296419 0.04641639 0.04110601 0.03676066
a61af66fc99e Initial load duke parents: diff changeset	1223 // 0.20000 0.08831616 0.07509618 0.06461766 0.05622444 0.04943437 0.04388975
a61af66fc99e Initial load duke parents: diff changeset	1224 // 0.25000 0.10311208 0.08724696 0.07471205 0.06469760 0.05661313 0.05002313
a61af66fc99e Initial load duke parents: diff changeset	1225 // 0.30000 0.11553050 0.09741183 0.08313394 0.07175114 0.06257797 0.05511132
a61af66fc99e Initial load duke parents: diff changeset	1226 // 0.35000 0.12538832 0.10545958 0.08978741 0.07731366 0.06727491 0.05911289
a61af66fc99e Initial load duke parents: diff changeset	1227 // 0.40000 0.13253818 0.11128511 0.09459590 0.08132834 0.07066107 0.06199500
a61af66fc99e Initial load duke parents: diff changeset	1228 // 0.45000 0.13687208 0.11481163 0.09750361 0.08375387 0.07270534 0.06373386
a61af66fc99e Initial load duke parents: diff changeset	1229 // 0.50000 0.13832410 0.11599237 0.09847664 0.08456518 0.07338887 0.06431510
a61af66fc99e Initial load duke parents: diff changeset	1230 // 0.55000 0.13687208 0.11481163 0.09750361 0.08375387 0.07270534 0.06373386
a61af66fc99e Initial load duke parents: diff changeset	1231 // 0.60000 0.13253818 0.11128511 0.09459590 0.08132834 0.07066107 0.06199500
a61af66fc99e Initial load duke parents: diff changeset	1232 // 0.65000 0.12538832 0.10545958 0.08978741 0.07731366 0.06727491 0.05911289
a61af66fc99e Initial load duke parents: diff changeset	1233 // 0.70000 0.11553050 0.09741183 0.08313394 0.07175114 0.06257797 0.05511132
a61af66fc99e Initial load duke parents: diff changeset	1234 // 0.75000 0.10311208 0.08724696 0.07471205 0.06469760 0.05661313 0.05002313
a61af66fc99e Initial load duke parents: diff changeset	1235 // 0.80000 0.08831616 0.07509618 0.06461766 0.05622444 0.04943437 0.04388975
a61af66fc99e Initial load duke parents: diff changeset	1236 // 0.85000 0.07135702 0.06111390 0.05296419 0.04641639 0.04110601 0.03676066
a61af66fc99e Initial load duke parents: diff changeset	1237 // 0.90000 0.05247504 0.04547452 0.03988045 0.03537016 0.03170171 0.02869272
a61af66fc99e Initial load duke parents: diff changeset	1238 // 0.95000 0.03193096 0.02836880 0.02550828 0.02319280 0.02130337 0.01974941
a61af66fc99e Initial load duke parents: diff changeset	1239 // 1.00000 0.01000000 0.01000000 0.01000000 0.01000000 0.01000000 0.01000000
a61af66fc99e Initial load duke parents: diff changeset	1240
a61af66fc99e Initial load duke parents: diff changeset	1241 double PSParallelCompact::dead_wood_limiter(double density, size_t min_percent)
a61af66fc99e Initial load duke parents: diff changeset	1242 {
a61af66fc99e Initial load duke parents: diff changeset	1243 assert(_dwl_initialized, "uninitialized");
a61af66fc99e Initial load duke parents: diff changeset	1244
a61af66fc99e Initial load duke parents: diff changeset	1245 // The raw limit is the value of the normal distribution at x = density.
a61af66fc99e Initial load duke parents: diff changeset	1246 const double raw_limit = normal_distribution(density);
a61af66fc99e Initial load duke parents: diff changeset	1247
a61af66fc99e Initial load duke parents: diff changeset	1248 // Adjust the raw limit so it becomes the minimum when the density is 1.
a61af66fc99e Initial load duke parents: diff changeset	1249 //
a61af66fc99e Initial load duke parents: diff changeset	1250 // First subtract the adjustment value (which is simply the precomputed value
a61af66fc99e Initial load duke parents: diff changeset	1251 // normal_distribution(1.0)); this yields a value of 0 when the density is 1.
a61af66fc99e Initial load duke parents: diff changeset	1252 // Then add the minimum value, so the minimum is returned when the density is
a61af66fc99e Initial load duke parents: diff changeset	1253 // 1. Finally, prevent negative values, which occur when the mean is not 0.5.
a61af66fc99e Initial load duke parents: diff changeset	1254 const double min = double(min_percent) / 100.0;
a61af66fc99e Initial load duke parents: diff changeset	1255 const double limit = raw_limit - _dwl_adjustment + min;
a61af66fc99e Initial load duke parents: diff changeset	1256 return MAX2(limit, 0.0);
a61af66fc99e Initial load duke parents: diff changeset	1257 }
a61af66fc99e Initial load duke parents: diff changeset	1258
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1259 ParallelCompactData::RegionData*
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1260 PSParallelCompact::first_dead_space_region(const RegionData* beg,
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1261 const RegionData* end)
0 a61af66fc99e Initial load duke parents: diff changeset	1262 {
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1263 const size_t region_size = ParallelCompactData::RegionSize;
0 a61af66fc99e Initial load duke parents: diff changeset	1264 ParallelCompactData& sd = summary_data();
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1265 size_t left = sd.region(beg);
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1266 size_t right = end > beg ? sd.region(end) - 1 : left;
0 a61af66fc99e Initial load duke parents: diff changeset	1267
a61af66fc99e Initial load duke parents: diff changeset	1268 // Binary search.
a61af66fc99e Initial load duke parents: diff changeset	1269 while (left < right) {
a61af66fc99e Initial load duke parents: diff changeset	1270 // Equivalent to (left + right) / 2, but does not overflow.
a61af66fc99e Initial load duke parents: diff changeset	1271 const size_t middle = left + (right - left) / 2;
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1272 RegionData* const middle_ptr = sd.region(middle);
0 a61af66fc99e Initial load duke parents: diff changeset	1273 HeapWord* const dest = middle_ptr->destination();
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1274 HeapWord* const addr = sd.region_to_addr(middle);
0 a61af66fc99e Initial load duke parents: diff changeset	1275 assert(dest != NULL, "sanity");
a61af66fc99e Initial load duke parents: diff changeset	1276 assert(dest <= addr, "must move left");
a61af66fc99e Initial load duke parents: diff changeset	1277
a61af66fc99e Initial load duke parents: diff changeset	1278 if (middle > left && dest < addr) {
a61af66fc99e Initial load duke parents: diff changeset	1279 right = middle - 1;
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1280 } else if (middle < right && middle_ptr->data_size() == region_size) {
0 a61af66fc99e Initial load duke parents: diff changeset	1281 left = middle + 1;
a61af66fc99e Initial load duke parents: diff changeset	1282 } else {
a61af66fc99e Initial load duke parents: diff changeset	1283 return middle_ptr;
a61af66fc99e Initial load duke parents: diff changeset	1284 }
a61af66fc99e Initial load duke parents: diff changeset	1285 }
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1286 return sd.region(left);
0 a61af66fc99e Initial load duke parents: diff changeset	1287 }
a61af66fc99e Initial load duke parents: diff changeset	1288
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1289 ParallelCompactData::RegionData*
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1290 PSParallelCompact::dead_wood_limit_region(const RegionData* beg,
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1291 const RegionData* end,
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1292 size_t dead_words)
0 a61af66fc99e Initial load duke parents: diff changeset	1293 {
a61af66fc99e Initial load duke parents: diff changeset	1294 ParallelCompactData& sd = summary_data();
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1295 size_t left = sd.region(beg);
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1296 size_t right = end > beg ? sd.region(end) - 1 : left;
0 a61af66fc99e Initial load duke parents: diff changeset	1297
a61af66fc99e Initial load duke parents: diff changeset	1298 // Binary search.
a61af66fc99e Initial load duke parents: diff changeset	1299 while (left < right) {
a61af66fc99e Initial load duke parents: diff changeset	1300 // Equivalent to (left + right) / 2, but does not overflow.
a61af66fc99e Initial load duke parents: diff changeset	1301 const size_t middle = left + (right - left) / 2;
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1302 RegionData* const middle_ptr = sd.region(middle);
0 a61af66fc99e Initial load duke parents: diff changeset	1303 HeapWord* const dest = middle_ptr->destination();
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1304 HeapWord* const addr = sd.region_to_addr(middle);
0 a61af66fc99e Initial load duke parents: diff changeset	1305 assert(dest != NULL, "sanity");
a61af66fc99e Initial load duke parents: diff changeset	1306 assert(dest <= addr, "must move left");
a61af66fc99e Initial load duke parents: diff changeset	1307
a61af66fc99e Initial load duke parents: diff changeset	1308 const size_t dead_to_left = pointer_delta(addr, dest);
a61af66fc99e Initial load duke parents: diff changeset	1309 if (middle > left && dead_to_left > dead_words) {
a61af66fc99e Initial load duke parents: diff changeset	1310 right = middle - 1;
a61af66fc99e Initial load duke parents: diff changeset	1311 } else if (middle < right && dead_to_left < dead_words) {
a61af66fc99e Initial load duke parents: diff changeset	1312 left = middle + 1;
a61af66fc99e Initial load duke parents: diff changeset	1313 } else {
a61af66fc99e Initial load duke parents: diff changeset	1314 return middle_ptr;
a61af66fc99e Initial load duke parents: diff changeset	1315 }
a61af66fc99e Initial load duke parents: diff changeset	1316 }
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1317 return sd.region(left);
0 a61af66fc99e Initial load duke parents: diff changeset	1318 }
a61af66fc99e Initial load duke parents: diff changeset	1319
a61af66fc99e Initial load duke parents: diff changeset	1320 // The result is valid during the summary phase, after the initial summarization
a61af66fc99e Initial load duke parents: diff changeset	1321 // of each space into itself, and before final summarization.
a61af66fc99e Initial load duke parents: diff changeset	1322 inline double
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1323 PSParallelCompact::reclaimed_ratio(const RegionData* const cp,
0 a61af66fc99e Initial load duke parents: diff changeset	1324 HeapWord* const bottom,
a61af66fc99e Initial load duke parents: diff changeset	1325 HeapWord* const top,
a61af66fc99e Initial load duke parents: diff changeset	1326 HeapWord* const new_top)
a61af66fc99e Initial load duke parents: diff changeset	1327 {
a61af66fc99e Initial load duke parents: diff changeset	1328 ParallelCompactData& sd = summary_data();
a61af66fc99e Initial load duke parents: diff changeset	1329
a61af66fc99e Initial load duke parents: diff changeset	1330 assert(cp != NULL, "sanity");
a61af66fc99e Initial load duke parents: diff changeset	1331 assert(bottom != NULL, "sanity");
a61af66fc99e Initial load duke parents: diff changeset	1332 assert(top != NULL, "sanity");
a61af66fc99e Initial load duke parents: diff changeset	1333 assert(new_top != NULL, "sanity");
a61af66fc99e Initial load duke parents: diff changeset	1334 assert(top >= new_top, "summary data problem?");
a61af66fc99e Initial load duke parents: diff changeset	1335 assert(new_top > bottom, "space is empty; should not be here");
a61af66fc99e Initial load duke parents: diff changeset	1336 assert(new_top >= cp->destination(), "sanity");
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1337 assert(top >= sd.region_to_addr(cp), "sanity");
0 a61af66fc99e Initial load duke parents: diff changeset	1338
a61af66fc99e Initial load duke parents: diff changeset	1339 HeapWord* const destination = cp->destination();
a61af66fc99e Initial load duke parents: diff changeset	1340 const size_t dense_prefix_live = pointer_delta(destination, bottom);
a61af66fc99e Initial load duke parents: diff changeset	1341 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	1342 const size_t compacted_region_used = pointer_delta(top,
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1343 sd.region_to_addr(cp));
0 a61af66fc99e Initial load duke parents: diff changeset	1344 const size_t reclaimable = compacted_region_used - compacted_region_live;
a61af66fc99e Initial load duke parents: diff changeset	1345
a61af66fc99e Initial load duke parents: diff changeset	1346 const double divisor = dense_prefix_live + 1.25 * compacted_region_live;
a61af66fc99e Initial load duke parents: diff changeset	1347 return double(reclaimable) / divisor;
a61af66fc99e Initial load duke parents: diff changeset	1348 }
a61af66fc99e Initial load duke parents: diff changeset	1349
a61af66fc99e Initial load duke parents: diff changeset	1350 // 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	1351 // compacted region. The address is always on a region boundary.
0 a61af66fc99e Initial load duke parents: diff changeset	1352 //
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1353 // 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	1354 // 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	1355 // 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	1356 // 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	1357 // 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	1358 // 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	1359 // (maximum) reclaimed_ratio() is selected.
0 a61af66fc99e Initial load duke parents: diff changeset	1360 HeapWord*
a61af66fc99e Initial load duke parents: diff changeset	1361 PSParallelCompact::compute_dense_prefix(const SpaceId id,
a61af66fc99e Initial load duke parents: diff changeset	1362 bool maximum_compaction)
a61af66fc99e Initial load duke parents: diff changeset	1363 {
483 0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1364 if (ParallelOldGCSplitALot) {
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1365 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	1366 // 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	1367 return _space_info[id].dense_prefix();
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1368 }
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1369 }
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1370
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1371 const size_t region_size = ParallelCompactData::RegionSize;
0 a61af66fc99e Initial load duke parents: diff changeset	1372 const ParallelCompactData& sd = summary_data();
a61af66fc99e Initial load duke parents: diff changeset	1373
a61af66fc99e Initial load duke parents: diff changeset	1374 const MutableSpace* const space = _space_info[id].space();
a61af66fc99e Initial load duke parents: diff changeset	1375 HeapWord* const top = space->top();
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1376 HeapWord* const top_aligned_up = sd.region_align_up(top);
0 a61af66fc99e Initial load duke parents: diff changeset	1377 HeapWord* const new_top = _space_info[id].new_top();
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1378 HeapWord* const new_top_aligned_up = sd.region_align_up(new_top);
0 a61af66fc99e Initial load duke parents: diff changeset	1379 HeapWord* const bottom = space->bottom();
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1380 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	1381 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	1382 const RegionData* const new_top_cp =
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1383 sd.addr_to_region_ptr(new_top_aligned_up);
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1384
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1385 // Skip full regions at the beginning of the space--they are necessarily part
0 a61af66fc99e Initial load duke parents: diff changeset	1386 // of the dense prefix.
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1387 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	1388 assert(full_cp->destination() == sd.region_to_addr(full_cp) \|\|
0 a61af66fc99e Initial load duke parents: diff changeset	1389 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	1390 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	1391 "region must have dead space");
0 a61af66fc99e Initial load duke parents: diff changeset	1392
a61af66fc99e Initial load duke parents: diff changeset	1393 // The gc number is saved whenever a maximum compaction is done, and used to
a61af66fc99e Initial load duke parents: diff changeset	1394 // determine when the maximum compaction interval has expired. This avoids
a61af66fc99e Initial load duke parents: diff changeset	1395 // successive max compactions for different reasons.
a61af66fc99e Initial load duke parents: diff changeset	1396 assert(total_invocations() >= _maximum_compaction_gc_num, "sanity");
a61af66fc99e Initial load duke parents: diff changeset	1397 const size_t gcs_since_max = total_invocations() - _maximum_compaction_gc_num;
a61af66fc99e Initial load duke parents: diff changeset	1398 const bool interval_ended = gcs_since_max > HeapMaximumCompactionInterval \|\|
a61af66fc99e Initial load duke parents: diff changeset	1399 total_invocations() == HeapFirstMaximumCompactionCount;
a61af66fc99e Initial load duke parents: diff changeset	1400 if (maximum_compaction \|\| full_cp == top_cp \|\| interval_ended) {
a61af66fc99e Initial load duke parents: diff changeset	1401 _maximum_compaction_gc_num = total_invocations();
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1402 return sd.region_to_addr(full_cp);
0 a61af66fc99e Initial load duke parents: diff changeset	1403 }
a61af66fc99e Initial load duke parents: diff changeset	1404
a61af66fc99e Initial load duke parents: diff changeset	1405 const size_t space_live = pointer_delta(new_top, bottom);
a61af66fc99e Initial load duke parents: diff changeset	1406 const size_t space_used = space->used_in_words();
a61af66fc99e Initial load duke parents: diff changeset	1407 const size_t space_capacity = space->capacity_in_words();
a61af66fc99e Initial load duke parents: diff changeset	1408
a61af66fc99e Initial load duke parents: diff changeset	1409 const double density = double(space_live) / double(space_capacity);
a61af66fc99e Initial load duke parents: diff changeset	1410 const size_t min_percent_free =
a61af66fc99e Initial load duke parents: diff changeset	1411 id == perm_space_id ? PermMarkSweepDeadRatio : MarkSweepDeadRatio;
a61af66fc99e Initial load duke parents: diff changeset	1412 const double limiter = dead_wood_limiter(density, min_percent_free);
a61af66fc99e Initial load duke parents: diff changeset	1413 const size_t dead_wood_max = space_used - space_live;
a61af66fc99e Initial load duke parents: diff changeset	1414 const size_t dead_wood_limit = MIN2(size_t(space_capacity * limiter),
a61af66fc99e Initial load duke parents: diff changeset	1415 dead_wood_max);
a61af66fc99e Initial load duke parents: diff changeset	1416
a61af66fc99e Initial load duke parents: diff changeset	1417 if (TraceParallelOldGCDensePrefix) {
a61af66fc99e Initial load duke parents: diff changeset	1418 tty->print_cr("space_live=" SIZE_FORMAT " " "space_used=" SIZE_FORMAT " "
a61af66fc99e Initial load duke parents: diff changeset	1419 "space_cap=" SIZE_FORMAT,
a61af66fc99e Initial load duke parents: diff changeset	1420 space_live, space_used,
a61af66fc99e Initial load duke parents: diff changeset	1421 space_capacity);
a61af66fc99e Initial load duke parents: diff changeset	1422 tty->print_cr("dead_wood_limiter(%6.4f, %d)=%6.4f "
a61af66fc99e Initial load duke parents: diff changeset	1423 "dead_wood_max=" SIZE_FORMAT " dead_wood_limit=" SIZE_FORMAT,
a61af66fc99e Initial load duke parents: diff changeset	1424 density, min_percent_free, limiter,
a61af66fc99e Initial load duke parents: diff changeset	1425 dead_wood_max, dead_wood_limit);
a61af66fc99e Initial load duke parents: diff changeset	1426 }
a61af66fc99e Initial load duke parents: diff changeset	1427
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1428 // 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	1429 const RegionData* const limit_cp =
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1430 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	1431
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1432 // Scan from the first region with dead space to the limit region and find the
0 a61af66fc99e Initial load duke parents: diff changeset	1433 // one with the best (largest) reclaimed ratio.
a61af66fc99e Initial load duke parents: diff changeset	1434 double best_ratio = 0.0;
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1435 const RegionData* best_cp = full_cp;
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1436 for (const RegionData* cp = full_cp; cp < limit_cp; ++cp) {
0 a61af66fc99e Initial load duke parents: diff changeset	1437 double tmp_ratio = reclaimed_ratio(cp, bottom, top, new_top);
a61af66fc99e Initial load duke parents: diff changeset	1438 if (tmp_ratio > best_ratio) {
a61af66fc99e Initial load duke parents: diff changeset	1439 best_cp = cp;
a61af66fc99e Initial load duke parents: diff changeset	1440 best_ratio = tmp_ratio;
a61af66fc99e Initial load duke parents: diff changeset	1441 }
a61af66fc99e Initial load duke parents: diff changeset	1442 }
a61af66fc99e Initial load duke parents: diff changeset	1443
a61af66fc99e Initial load duke parents: diff changeset	1444 #if 0
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1445 // 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	1446 // 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	1447 // ("first-free"). The first-free region is usually near the start of the
0 a61af66fc99e Initial load duke parents: diff changeset	1448 // heap, which means we are copying most of the heap already, so copy a bit
a61af66fc99e Initial load duke parents: diff changeset	1449 // more to get complete compaction.
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1450 if (pointer_delta(best_cp, full_cp, sizeof(RegionData)) < 4) {
0 a61af66fc99e Initial load duke parents: diff changeset	1451 _maximum_compaction_gc_num = total_invocations();
a61af66fc99e Initial load duke parents: diff changeset	1452 best_cp = full_cp;
a61af66fc99e Initial load duke parents: diff changeset	1453 }
a61af66fc99e Initial load duke parents: diff changeset	1454 #endif // #if 0
a61af66fc99e Initial load duke parents: diff changeset	1455
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1456 return sd.region_to_addr(best_cp);
0 a61af66fc99e Initial load duke parents: diff changeset	1457 }
a61af66fc99e Initial load duke parents: diff changeset	1458
483 0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1459 #ifndef PRODUCT
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1460 void
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1461 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	1462 size_t words)
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1463 {
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1464 if (TraceParallelOldGCSummaryPhase) {
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1465 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	1466 SIZE_FORMAT, start, start + words, words);
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1467 }
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1468
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1469 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	1470 CollectedHeap::fill_with_objects(start, words);
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1471 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	1472 _mark_bitmap.mark_obj(p, words);
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1473 _summary_data.add_obj(p, words);
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1474 start_array->allocate_block(p);
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
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1478 void
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1479 PSParallelCompact::summarize_new_objects(SpaceId id, HeapWord* start)
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1480 {
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1481 ParallelCompactData& sd = summary_data();
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1482 MutableSpace* space = _space_info[id].space();
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 // Find the source and destination start addresses.
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1485 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	1486 HeapWord* dst_addr;
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1487 if (src_addr < start) {
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1488 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	1489 } else if (src_addr > space->bottom()) {
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1490 // 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	1491 // 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	1492 // destination from the previous region.
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1493 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	1494 dst_addr = cp->destination() + cp->data_size();
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1495 } else {
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1496 // Filling the entire space.
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1497 dst_addr = space->bottom();
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1498 }
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1499 assert(dst_addr != NULL, "sanity");
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1500
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1501 // Update the summary data.
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1502 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	1503 src_addr, space->top(), NULL,
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1504 dst_addr, space->end(),
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1505 _space_info[id].new_top_addr());
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1506 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	1507 }
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 void
496 b27c885f75f9 6786188: par compact - "SplitALot" stress mode should fill to_space jcoomes parents: 495 diff changeset	1510 PSParallelCompact::provoke_split_fill_survivor(SpaceId id)
b27c885f75f9 6786188: par compact - "SplitALot" stress mode should fill to_space jcoomes parents: 495 diff changeset	1511 {
b27c885f75f9 6786188: par compact - "SplitALot" stress mode should fill to_space jcoomes parents: 495 diff changeset	1512 if (total_invocations() % (ParallelOldGCSplitInterval * 3) != 0) {
b27c885f75f9 6786188: par compact - "SplitALot" stress mode should fill to_space jcoomes parents: 495 diff changeset	1513 return;
b27c885f75f9 6786188: par compact - "SplitALot" stress mode should fill to_space jcoomes parents: 495 diff changeset	1514 }
b27c885f75f9 6786188: par compact - "SplitALot" stress mode should fill to_space jcoomes parents: 495 diff changeset	1515
b27c885f75f9 6786188: par compact - "SplitALot" stress mode should fill to_space jcoomes parents: 495 diff changeset	1516 MutableSpace* const space = _space_info[id].space();
b27c885f75f9 6786188: par compact - "SplitALot" stress mode should fill to_space jcoomes parents: 495 diff changeset	1517 if (space->is_empty()) {
b27c885f75f9 6786188: par compact - "SplitALot" stress mode should fill to_space jcoomes parents: 495 diff changeset	1518 HeapWord* b = space->bottom();
b27c885f75f9 6786188: par compact - "SplitALot" stress mode should fill to_space jcoomes parents: 495 diff changeset	1519 HeapWord* t = b + space->capacity_in_words() / 2;
b27c885f75f9 6786188: par compact - "SplitALot" stress mode should fill to_space jcoomes parents: 495 diff changeset	1520 space->set_top(t);
b27c885f75f9 6786188: par compact - "SplitALot" stress mode should fill to_space jcoomes parents: 495 diff changeset	1521 if (ZapUnusedHeapArea) {
b27c885f75f9 6786188: par compact - "SplitALot" stress mode should fill to_space jcoomes parents: 495 diff changeset	1522 space->set_top_for_allocations();
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
1571 2d127394260e 6916623: Align object to 16 bytes to use Compressed Oops with java heap up to 64Gb kvn parents: 1489 diff changeset	1525 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	1526 size_t obj_len = min_size;
496 b27c885f75f9 6786188: par compact - "SplitALot" stress mode should fill to_space jcoomes parents: 495 diff changeset	1527 while (b + obj_len <= t) {
b27c885f75f9 6786188: par compact - "SplitALot" stress mode should fill to_space jcoomes parents: 495 diff changeset	1528 CollectedHeap::fill_with_object(b, obj_len);
b27c885f75f9 6786188: par compact - "SplitALot" stress mode should fill to_space jcoomes parents: 495 diff changeset	1529 mark_bitmap()->mark_obj(b, obj_len);
b27c885f75f9 6786188: par compact - "SplitALot" stress mode should fill to_space jcoomes parents: 495 diff changeset	1530 summary_data().add_obj(b, obj_len);
b27c885f75f9 6786188: par compact - "SplitALot" stress mode should fill to_space jcoomes parents: 495 diff changeset	1531 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	1532 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	1533 }
b27c885f75f9 6786188: par compact - "SplitALot" stress mode should fill to_space jcoomes parents: 495 diff changeset	1534 if (b < t) {
b27c885f75f9 6786188: par compact - "SplitALot" stress mode should fill to_space jcoomes parents: 495 diff changeset	1535 // 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	1536 space->set_top(b);
b27c885f75f9 6786188: par compact - "SplitALot" stress mode should fill to_space jcoomes parents: 495 diff changeset	1537 if (ZapUnusedHeapArea) {
b27c885f75f9 6786188: par compact - "SplitALot" stress mode should fill to_space jcoomes parents: 495 diff changeset	1538 space->set_top_for_allocations();
b27c885f75f9 6786188: par compact - "SplitALot" stress mode should fill to_space jcoomes parents: 495 diff changeset	1539 }
b27c885f75f9 6786188: par compact - "SplitALot" stress mode should fill to_space jcoomes parents: 495 diff changeset	1540 }
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 HeapWord** nta = _space_info[id].new_top_addr();
b27c885f75f9 6786188: par compact - "SplitALot" stress mode should fill to_space jcoomes parents: 495 diff changeset	1543 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	1544 space->bottom(), space->top(), NULL,
b27c885f75f9 6786188: par compact - "SplitALot" stress mode should fill to_space jcoomes parents: 495 diff changeset	1545 space->bottom(), space->end(), nta);
b27c885f75f9 6786188: par compact - "SplitALot" stress mode should fill to_space jcoomes parents: 495 diff changeset	1546 assert(result, "space must fit into itself");
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 void
483 0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1551 PSParallelCompact::provoke_split(bool & max_compaction)
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1552 {
496 b27c885f75f9 6786188: par compact - "SplitALot" stress mode should fill to_space jcoomes parents: 495 diff changeset	1553 if (total_invocations() % ParallelOldGCSplitInterval != 0) {
b27c885f75f9 6786188: par compact - "SplitALot" stress mode should fill to_space jcoomes parents: 495 diff changeset	1554 return;
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
483 0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1557 const size_t region_size = ParallelCompactData::RegionSize;
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1558 ParallelCompactData& sd = summary_data();
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1559
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1560 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	1561 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	1562 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	1563 _space_info[eden_space_id].new_top());
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1564 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	1565 _space_info[from_space_id].new_top());
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1566
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1567 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	1568 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	1569 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	1570 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	1571 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	1572
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1573 // 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	1574 SpaceId id;
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1575 MutableSpace* space;
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1576 size_t live_words;
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1577 size_t fill_words;
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1578 if (eden_live + eden_fillable >= region_size * 2) {
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1579 id = eden_space_id;
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1580 space = eden_space;
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1581 live_words = eden_live;
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1582 fill_words = eden_fillable;
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1583 } 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	1584 id = from_space_id;
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1585 space = from_space;
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1586 live_words = from_live;
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1587 fill_words = from_fillable;
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1588 } else {
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1589 return; // Give up.
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1590 }
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1591 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	1592
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1593 if (live_words < region_size * 2) {
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1594 // 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	1595 HeapWord* const fill_start = space->top();
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1596 live_words += fill_words;
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1597
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1598 space->set_top(fill_start + fill_words);
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1599 if (ZapUnusedHeapArea) {
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1600 space->set_top_for_allocations();
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1601 }
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1602
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1603 HeapWord* cur_addr = fill_start;
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1604 while (fill_words > 0) {
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1605 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	1606 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	1607 if (fill_words - cur_size < min_fill_size) {
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1608 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	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 CollectedHeap::fill_with_object(cur_addr, cur_size);
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1612 mark_bitmap()->mark_obj(cur_addr, cur_size);
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1613 sd.add_obj(cur_addr, cur_size);
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1614
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1615 cur_addr += cur_size;
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1616 fill_words -= cur_size;
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 summarize_new_objects(id, fill_start);
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1620 }
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1621
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1622 max_compaction = false;
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1623
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1624 // 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	1625 // 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	1626 id = old_space_id;
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1627 space = _space_info[id].space();
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1628 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	1629 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	1630 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	1631
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1632 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	1633 // 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	1634 HeapWord* const fill_start = space->top();
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1635 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	1636 space->set_top(space->top() + fill_size);
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1637 if (ZapUnusedHeapArea) {
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1638 space->set_top_for_allocations();
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 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	1641 summarize_new_objects(id, fill_start);
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1642 _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	1643 } else if (dead + free_at_end > free_target) {
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1644 // 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	1645 HeapWord* cur = sd.region_align_down(space->top());
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1646 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	1647 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	1648 while (dead_to_right < free_target) {
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1649 cur -= region_size;
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1650 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	1651 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	1652 }
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1653 _space_info[id].set_dense_prefix(cur);
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1654 }
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1655 }
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1656 #endif // #ifndef PRODUCT
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1657
0 a61af66fc99e Initial load duke parents: diff changeset	1658 void PSParallelCompact::summarize_spaces_quick()
a61af66fc99e Initial load duke parents: diff changeset	1659 {
a61af66fc99e Initial load duke parents: diff changeset	1660 for (unsigned int i = 0; i < last_space_id; ++i) {
a61af66fc99e Initial load duke parents: diff changeset	1661 const MutableSpace* space = _space_info[i].space();
482 7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1662 HeapWord** nta = _space_info[i].new_top_addr();
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1663 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	1664 space->bottom(), space->top(), NULL,
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1665 space->bottom(), space->end(), nta);
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1666 assert(result, "space must fit into itself");
0 a61af66fc99e Initial load duke parents: diff changeset	1667 _space_info[i].set_dense_prefix(space->bottom());
a61af66fc99e Initial load duke parents: diff changeset	1668 }
496 b27c885f75f9 6786188: par compact - "SplitALot" stress mode should fill to_space jcoomes parents: 495 diff changeset	1669
b27c885f75f9 6786188: par compact - "SplitALot" stress mode should fill to_space jcoomes parents: 495 diff changeset	1670 #ifndef PRODUCT
b27c885f75f9 6786188: par compact - "SplitALot" stress mode should fill to_space jcoomes parents: 495 diff changeset	1671 if (ParallelOldGCSplitALot) {
b27c885f75f9 6786188: par compact - "SplitALot" stress mode should fill to_space jcoomes parents: 495 diff changeset	1672 provoke_split_fill_survivor(to_space_id);
b27c885f75f9 6786188: par compact - "SplitALot" stress mode should fill to_space jcoomes parents: 495 diff changeset	1673 }
b27c885f75f9 6786188: par compact - "SplitALot" stress mode should fill to_space jcoomes parents: 495 diff changeset	1674 #endif // #ifndef PRODUCT
0 a61af66fc99e Initial load duke parents: diff changeset	1675 }
a61af66fc99e Initial load duke parents: diff changeset	1676
a61af66fc99e Initial load duke parents: diff changeset	1677 void PSParallelCompact::fill_dense_prefix_end(SpaceId id)
a61af66fc99e Initial load duke parents: diff changeset	1678 {
a61af66fc99e Initial load duke parents: diff changeset	1679 HeapWord* const dense_prefix_end = dense_prefix(id);
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1680 const RegionData* region = _summary_data.addr_to_region_ptr(dense_prefix_end);
0 a61af66fc99e Initial load duke parents: diff changeset	1681 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	1682 if (dead_space_crosses_boundary(region, dense_prefix_bit)) {
0 a61af66fc99e Initial load duke parents: diff changeset	1683 // Only enough dead space is filled so that any remaining dead space to the
a61af66fc99e Initial load duke parents: diff changeset	1684 // left is larger than the minimum filler object. (The remainder is filled
a61af66fc99e Initial load duke parents: diff changeset	1685 // during the copy/update phase.)
a61af66fc99e Initial load duke parents: diff changeset	1686 //
a61af66fc99e Initial load duke parents: diff changeset	1687 // The size of the dead space to the right of the boundary is not a
a61af66fc99e Initial load duke parents: diff changeset	1688 // concern, since compaction will be able to use whatever space is
a61af66fc99e Initial load duke parents: diff changeset	1689 // available.
a61af66fc99e Initial load duke parents: diff changeset	1690 //
a61af66fc99e Initial load duke parents: diff changeset	1691 // Here '\|\|' is the boundary, 'x' represents a don't care bit and a box
a61af66fc99e Initial load duke parents: diff changeset	1692 // surrounds the space to be filled with an object.
a61af66fc99e Initial load duke parents: diff changeset	1693 //
a61af66fc99e Initial load duke parents: diff changeset	1694 // In the 32-bit VM, each bit represents two 32-bit words:
a61af66fc99e Initial load duke parents: diff changeset	1695 // +---+
a61af66fc99e Initial load duke parents: diff changeset	1696 // a) beg_bits: ... x x x \| 0 \| \|\| 0 x x ...
a61af66fc99e Initial load duke parents: diff changeset	1697 // end_bits: ... x x x \| 0 \| \|\| 0 x x ...
a61af66fc99e Initial load duke parents: diff changeset	1698 // +---+
a61af66fc99e Initial load duke parents: diff changeset	1699 //
a61af66fc99e Initial load duke parents: diff changeset	1700 // In the 64-bit VM, each bit represents one 64-bit word:
a61af66fc99e Initial load duke parents: diff changeset	1701 // +------------+
a61af66fc99e Initial load duke parents: diff changeset	1702 // b) beg_bits: ... x x x \| 0 \|\| 0 \| x x ...
a61af66fc99e Initial load duke parents: diff changeset	1703 // end_bits: ... x x 1 \| 0 \|\| 0 \| x x ...
a61af66fc99e Initial load duke parents: diff changeset	1704 // +------------+
a61af66fc99e Initial load duke parents: diff changeset	1705 // +-------+
a61af66fc99e Initial load duke parents: diff changeset	1706 // c) beg_bits: ... x x \| 0 0 \| \|\| 0 x x ...
a61af66fc99e Initial load duke parents: diff changeset	1707 // end_bits: ... x 1 \| 0 0 \| \|\| 0 x x ...
a61af66fc99e Initial load duke parents: diff changeset	1708 // +-------+
a61af66fc99e Initial load duke parents: diff changeset	1709 // +-----------+
a61af66fc99e Initial load duke parents: diff changeset	1710 // d) beg_bits: ... x \| 0 0 0 \| \|\| 0 x x ...
a61af66fc99e Initial load duke parents: diff changeset	1711 // end_bits: ... 1 \| 0 0 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 // e) beg_bits: ... 0 0 \| 0 0 \| \|\| 0 x x ...
a61af66fc99e Initial load duke parents: diff changeset	1715 // end_bits: ... 0 0 \| 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 // 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	1719 size_t obj_len = CollectedHeap::min_fill_size();
0 a61af66fc99e Initial load duke parents: diff changeset	1720 HeapWord* obj_beg = dense_prefix_end - obj_len;
a61af66fc99e Initial load duke parents: diff changeset	1721
a61af66fc99e Initial load duke parents: diff changeset	1722 #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	1723 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	1724 // 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	1725 } else if (_mark_bitmap.is_obj_end(dense_prefix_bit - 2)) {
0 a61af66fc99e Initial load duke parents: diff changeset	1726 // Case b above.
a61af66fc99e Initial load duke parents: diff changeset	1727 obj_beg = dense_prefix_end - 1;
a61af66fc99e Initial load duke parents: diff changeset	1728 } else if (!_mark_bitmap.is_obj_end(dense_prefix_bit - 3) &&
a61af66fc99e Initial load duke parents: diff changeset	1729 _mark_bitmap.is_obj_end(dense_prefix_bit - 4)) {
a61af66fc99e Initial load duke parents: diff changeset	1730 // Case d above.
a61af66fc99e Initial load duke parents: diff changeset	1731 obj_beg = dense_prefix_end - 3;
a61af66fc99e Initial load duke parents: diff changeset	1732 obj_len = 3;
a61af66fc99e Initial load duke parents: diff changeset	1733 }
a61af66fc99e Initial load duke parents: diff changeset	1734 #endif // #ifdef _LP64
a61af66fc99e Initial load duke parents: diff changeset	1735
482 7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1736 CollectedHeap::fill_with_object(obj_beg, obj_len);
0 a61af66fc99e Initial load duke parents: diff changeset	1737 _mark_bitmap.mark_obj(obj_beg, obj_len);
a61af66fc99e Initial load duke parents: diff changeset	1738 _summary_data.add_obj(obj_beg, obj_len);
a61af66fc99e Initial load duke parents: diff changeset	1739 assert(start_array(id) != NULL, "sanity");
a61af66fc99e Initial load duke parents: diff changeset	1740 start_array(id)->allocate_block(obj_beg);
a61af66fc99e Initial load duke parents: diff changeset	1741 }
a61af66fc99e Initial load duke parents: diff changeset	1742 }
a61af66fc99e Initial load duke parents: diff changeset	1743
a61af66fc99e Initial load duke parents: diff changeset	1744 void
482 7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1745 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	1746 {
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1747 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	1748 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	1749 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	1750 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	1751 cur->set_source_region(0);
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1752 }
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1753 }
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 void
0 a61af66fc99e Initial load duke parents: diff changeset	1756 PSParallelCompact::summarize_space(SpaceId id, bool maximum_compaction)
a61af66fc99e Initial load duke parents: diff changeset	1757 {
a61af66fc99e Initial load duke parents: diff changeset	1758 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	1759 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	1760 ParallelOldGCSplitALot && id == old_space_id,
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1761 "should have been reset in summarize_spaces_quick()");
0 a61af66fc99e Initial load duke parents: diff changeset	1762
a61af66fc99e Initial load duke parents: diff changeset	1763 const MutableSpace* space = _space_info[id].space();
265 f88815ca1af1 6483129: par compact assertion failure (new_top > bottom) jcoomes parents: 264 diff changeset	1764 if (_space_info[id].new_top() != space->bottom()) {
f88815ca1af1 6483129: par compact assertion failure (new_top > bottom) jcoomes parents: 264 diff changeset	1765 HeapWord* dense_prefix_end = compute_dense_prefix(id, maximum_compaction);
f88815ca1af1 6483129: par compact assertion failure (new_top > bottom) jcoomes parents: 264 diff changeset	1766 _space_info[id].set_dense_prefix(dense_prefix_end);
0 a61af66fc99e Initial load duke parents: diff changeset	1767
a61af66fc99e Initial load duke parents: diff changeset	1768 #ifndef PRODUCT
265 f88815ca1af1 6483129: par compact assertion failure (new_top > bottom) jcoomes parents: 264 diff changeset	1769 if (TraceParallelOldGCDensePrefix) {
f88815ca1af1 6483129: par compact assertion failure (new_top > bottom) jcoomes parents: 264 diff changeset	1770 print_dense_prefix_stats("ratio", id, maximum_compaction,
f88815ca1af1 6483129: par compact assertion failure (new_top > bottom) jcoomes parents: 264 diff changeset	1771 dense_prefix_end);
f88815ca1af1 6483129: par compact assertion failure (new_top > bottom) jcoomes parents: 264 diff changeset	1772 HeapWord* addr = compute_dense_prefix_via_density(id, maximum_compaction);
f88815ca1af1 6483129: par compact assertion failure (new_top > bottom) jcoomes parents: 264 diff changeset	1773 print_dense_prefix_stats("density", id, maximum_compaction, addr);
f88815ca1af1 6483129: par compact assertion failure (new_top > bottom) jcoomes parents: 264 diff changeset	1774 }
0 a61af66fc99e Initial load duke parents: diff changeset	1775 #endif // #ifndef PRODUCT
a61af66fc99e Initial load duke parents: diff changeset	1776
483 0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1777 // 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	1778 // 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	1779 // compacts everything can be left in place.
265 f88815ca1af1 6483129: par compact assertion failure (new_top > bottom) jcoomes parents: 264 diff changeset	1780 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	1781 // 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	1782 // 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	1783 // 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	1784 // 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	1785 // 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	1786 fill_dense_prefix_end(id);
482 7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1787
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1788 // 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	1789 _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	1790 _summary_data.summarize(_space_info[id].split_info(),
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1791 dense_prefix_end, space->top(), NULL,
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1792 dense_prefix_end, space->end(),
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1793 _space_info[id].new_top_addr());
265 f88815ca1af1 6483129: par compact assertion failure (new_top > bottom) jcoomes parents: 264 diff changeset	1794 }
0 a61af66fc99e Initial load duke parents: diff changeset	1795 }
a61af66fc99e Initial load duke parents: diff changeset	1796
a61af66fc99e Initial load duke parents: diff changeset	1797 if (TraceParallelOldGCSummaryPhase) {
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1798 const size_t region_size = ParallelCompactData::RegionSize;
265 f88815ca1af1 6483129: par compact assertion failure (new_top > bottom) jcoomes parents: 264 diff changeset	1799 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	1800 const size_t dp_region = _summary_data.addr_to_region_idx(dense_prefix_end);
0 a61af66fc99e Initial load duke parents: diff changeset	1801 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	1802 HeapWord* const new_top = _space_info[id].new_top();
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1803 const HeapWord* nt_aligned_up = _summary_data.region_align_up(new_top);
0 a61af66fc99e Initial load duke parents: diff changeset	1804 const size_t cr_words = pointer_delta(nt_aligned_up, dense_prefix_end);
a61af66fc99e Initial load duke parents: diff changeset	1805 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	1806 "dp_region=" SIZE_FORMAT " " "dp_count=" SIZE_FORMAT " "
0 a61af66fc99e Initial load duke parents: diff changeset	1807 "cr_count=" SIZE_FORMAT " " "nt=" PTR_FORMAT,
a61af66fc99e Initial load duke parents: diff changeset	1808 id, space->capacity_in_words(), dense_prefix_end,
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1809 dp_region, dp_words / region_size,
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1810 cr_words / region_size, new_top);
0 a61af66fc99e Initial load duke parents: diff changeset	1811 }
a61af66fc99e Initial load duke parents: diff changeset	1812 }
a61af66fc99e Initial load duke parents: diff changeset	1813
482 7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1814 #ifndef PRODUCT
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1815 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	1816 HeapWord* dst_beg, HeapWord* dst_end,
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1817 SpaceId src_space_id,
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1818 HeapWord* src_beg, HeapWord* src_end)
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1819 {
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1820 if (TraceParallelOldGCSummaryPhase) {
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1821 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	1822 "src=" PTR_FORMAT "-" PTR_FORMAT " "
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1823 SIZE_FORMAT "-" SIZE_FORMAT " "
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1824 "dst=" PTR_FORMAT "-" PTR_FORMAT " "
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1825 SIZE_FORMAT "-" SIZE_FORMAT,
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1826 src_space_id, space_names[src_space_id],
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1827 dst_space_id, space_names[dst_space_id],
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1828 src_beg, src_end,
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1829 _summary_data.addr_to_region_idx(src_beg),
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1830 _summary_data.addr_to_region_idx(src_end),
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1831 dst_beg, dst_end,
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1832 _summary_data.addr_to_region_idx(dst_beg),
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1833 _summary_data.addr_to_region_idx(dst_end));
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1834 }
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1835 }
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1836 #endif // #ifndef PRODUCT
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1837
0 a61af66fc99e Initial load duke parents: diff changeset	1838 void PSParallelCompact::summary_phase(ParCompactionManager* cm,
a61af66fc99e Initial load duke parents: diff changeset	1839 bool maximum_compaction)
a61af66fc99e Initial load duke parents: diff changeset	1840 {
a61af66fc99e Initial load duke parents: diff changeset	1841 EventMark m("2 summarize");
a61af66fc99e Initial load duke parents: diff changeset	1842 TraceTime tm("summary phase", print_phases(), true, gclog_or_tty);
a61af66fc99e Initial load duke parents: diff changeset	1843 // trace("2");
a61af66fc99e Initial load duke parents: diff changeset	1844
a61af66fc99e Initial load duke parents: diff changeset	1845 #ifdef ASSERT
a61af66fc99e Initial load duke parents: diff changeset	1846 if (TraceParallelOldGCMarkingPhase) {
a61af66fc99e Initial load duke parents: diff changeset	1847 tty->print_cr("add_obj_count=" SIZE_FORMAT " "
a61af66fc99e Initial load duke parents: diff changeset	1848 "add_obj_bytes=" SIZE_FORMAT,
a61af66fc99e Initial load duke parents: diff changeset	1849 add_obj_count, add_obj_size * HeapWordSize);
a61af66fc99e Initial load duke parents: diff changeset	1850 tty->print_cr("mark_bitmap_count=" SIZE_FORMAT " "
a61af66fc99e Initial load duke parents: diff changeset	1851 "mark_bitmap_bytes=" SIZE_FORMAT,
a61af66fc99e Initial load duke parents: diff changeset	1852 mark_bitmap_count, mark_bitmap_size * HeapWordSize);
a61af66fc99e Initial load duke parents: diff changeset	1853 }
a61af66fc99e Initial load duke parents: diff changeset	1854 #endif // #ifdef ASSERT
a61af66fc99e Initial load duke parents: diff changeset	1855
a61af66fc99e Initial load duke parents: diff changeset	1856 // Quick summarization of each space into itself, to see how much is live.
a61af66fc99e Initial load duke parents: diff changeset	1857 summarize_spaces_quick();
a61af66fc99e Initial load duke parents: diff changeset	1858
a61af66fc99e Initial load duke parents: diff changeset	1859 if (TraceParallelOldGCSummaryPhase) {
a61af66fc99e Initial load duke parents: diff changeset	1860 tty->print_cr("summary_phase: after summarizing each space to self");
a61af66fc99e Initial load duke parents: diff changeset	1861 Universe::print();
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1862 NOT_PRODUCT(print_region_ranges());
0 a61af66fc99e Initial load duke parents: diff changeset	1863 if (Verbose) {
a61af66fc99e Initial load duke parents: diff changeset	1864 NOT_PRODUCT(print_initial_summary_data(_summary_data, _space_info));
a61af66fc99e Initial load duke parents: diff changeset	1865 }
a61af66fc99e Initial load duke parents: diff changeset	1866 }
a61af66fc99e Initial load duke parents: diff changeset	1867
a61af66fc99e Initial load duke parents: diff changeset	1868 // The amount of live data that will end up in old space (assuming it fits).
a61af66fc99e Initial load duke parents: diff changeset	1869 size_t old_space_total_live = 0;
482 7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1870 assert(perm_space_id < old_space_id, "should not count perm data here");
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1871 for (unsigned int id = old_space_id; id < last_space_id; ++id) {
0 a61af66fc99e Initial load duke parents: diff changeset	1872 old_space_total_live += pointer_delta(_space_info[id].new_top(),
a61af66fc99e Initial load duke parents: diff changeset	1873 _space_info[id].space()->bottom());
a61af66fc99e Initial load duke parents: diff changeset	1874 }
a61af66fc99e Initial load duke parents: diff changeset	1875
482 7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1876 MutableSpace* const old_space = _space_info[old_space_id].space();
483 0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1877 const size_t old_capacity = old_space->capacity_in_words();
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1878 if (old_space_total_live > old_capacity) {
0 a61af66fc99e Initial load duke parents: diff changeset	1879 // XXX - should also try to expand
a61af66fc99e Initial load duke parents: diff changeset	1880 maximum_compaction = true;
a61af66fc99e Initial load duke parents: diff changeset	1881 }
483 0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1882 #ifndef PRODUCT
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1883 if (ParallelOldGCSplitALot && old_space_total_live < old_capacity) {
496 b27c885f75f9 6786188: par compact - "SplitALot" stress mode should fill to_space jcoomes parents: 495 diff changeset	1884 provoke_split(maximum_compaction);
483 0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1885 }
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1886 #endif // #ifndef PRODUCT
0 a61af66fc99e Initial load duke parents: diff changeset	1887
a61af66fc99e Initial load duke parents: diff changeset	1888 // Permanent and Old generations.
a61af66fc99e Initial load duke parents: diff changeset	1889 summarize_space(perm_space_id, maximum_compaction);
a61af66fc99e Initial load duke parents: diff changeset	1890 summarize_space(old_space_id, maximum_compaction);
a61af66fc99e Initial load duke parents: diff changeset	1891
482 7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1892 // 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	1893 // 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	1894 // 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	1895 // target.
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1896 SpaceId dst_space_id = old_space_id;
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1897 HeapWord* dst_space_end = old_space->end();
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1898 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	1899 for (unsigned int id = eden_space_id; id < last_space_id; ++id) {
0 a61af66fc99e Initial load duke parents: diff changeset	1900 const MutableSpace* space = _space_info[id].space();
a61af66fc99e Initial load duke parents: diff changeset	1901 const size_t live = pointer_delta(_space_info[id].new_top(),
a61af66fc99e Initial load duke parents: diff changeset	1902 space->bottom());
482 7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1903 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	1904
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1905 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	1906 SpaceId(id), space->bottom(), space->top());)
266 2214b226b7f0 6724367: par compact could clear less young gen summary data jcoomes parents: 265 diff changeset	1907 if (live > 0 && live <= available) {
0 a61af66fc99e Initial load duke parents: diff changeset	1908 // All the live data will fit.
482 7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1909 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	1910 space->bottom(), space->top(),
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1911 NULL,
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1912 *new_top_addr, dst_space_end,
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1913 new_top_addr);
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1914 assert(done, "space must fit into old gen");
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1915
266 2214b226b7f0 6724367: par compact could clear less young gen summary data jcoomes parents: 265 diff changeset	1916 // Reset the new_top value for the space.
2214b226b7f0 6724367: par compact could clear less young gen summary data jcoomes parents: 265 diff changeset	1917 _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	1918 } else if (live > 0) {
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1919 // 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	1920 HeapWord* next_src_addr = NULL;
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1921 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	1922 space->bottom(), space->top(),
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1923 &next_src_addr,
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1924 *new_top_addr, dst_space_end,
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1925 new_top_addr);
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1926 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	1927 assert(next_src_addr != NULL, "sanity");
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1928
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1929 // 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	1930 // within the space itself.
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1931 dst_space_id = SpaceId(id);
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1932 dst_space_end = space->end();
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1933 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	1934 NOT_PRODUCT(summary_phase_msg(dst_space_id,
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1935 space->bottom(), dst_space_end,
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1936 SpaceId(id), next_src_addr, space->top());)
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1937 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	1938 next_src_addr, space->top(),
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1939 NULL,
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 new_top_addr);
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1942 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	1943 assert(*new_top_addr <= space->top(), "usage should not grow");
0 a61af66fc99e Initial load duke parents: diff changeset	1944 }
a61af66fc99e Initial load duke parents: diff changeset	1945 }
a61af66fc99e Initial load duke parents: diff changeset	1946
a61af66fc99e Initial load duke parents: diff changeset	1947 if (TraceParallelOldGCSummaryPhase) {
a61af66fc99e Initial load duke parents: diff changeset	1948 tty->print_cr("summary_phase: after final summarization");
a61af66fc99e Initial load duke parents: diff changeset	1949 Universe::print();
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1950 NOT_PRODUCT(print_region_ranges());
0 a61af66fc99e Initial load duke parents: diff changeset	1951 if (Verbose) {
a61af66fc99e Initial load duke parents: diff changeset	1952 NOT_PRODUCT(print_generic_summary_data(_summary_data, _space_info));
a61af66fc99e Initial load duke parents: diff changeset	1953 }
a61af66fc99e Initial load duke parents: diff changeset	1954 }
a61af66fc99e Initial load duke parents: diff changeset	1955 }
a61af66fc99e Initial load duke parents: diff changeset	1956
a61af66fc99e Initial load duke parents: diff changeset	1957 // This method should contain all heap-specific policy for invoking a full
a61af66fc99e Initial load duke parents: diff changeset	1958 // collection. invoke_no_policy() will only attempt to compact the heap; it
a61af66fc99e Initial load duke parents: diff changeset	1959 // will do nothing further. If we need to bail out for policy reasons, scavenge
a61af66fc99e Initial load duke parents: diff changeset	1960 // before full gc, or any other specialized behavior, it needs to be added here.
a61af66fc99e Initial load duke parents: diff changeset	1961 //
a61af66fc99e Initial load duke parents: diff changeset	1962 // Note that this method should only be called from the vm_thread while at a
a61af66fc99e Initial load duke parents: diff changeset	1963 // safepoint.
1387 0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 1311 diff changeset	1964 //
0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 1311 diff changeset	1965 // 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	1966 // 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	1967 // 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	1968 // are being taken to free space.
0 a61af66fc99e Initial load duke parents: diff changeset	1969 void PSParallelCompact::invoke(bool maximum_heap_compaction) {
a61af66fc99e Initial load duke parents: diff changeset	1970 assert(SafepointSynchronize::is_at_safepoint(), "should be at safepoint");
a61af66fc99e Initial load duke parents: diff changeset	1971 assert(Thread::current() == (Thread*)VMThread::vm_thread(),
a61af66fc99e Initial load duke parents: diff changeset	1972 "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	1973
0 a61af66fc99e Initial load duke parents: diff changeset	1974 ParallelScavengeHeap* heap = gc_heap();
a61af66fc99e Initial load duke parents: diff changeset	1975 GCCause::Cause gc_cause = heap->gc_cause();
a61af66fc99e Initial load duke parents: diff changeset	1976 assert(!heap->is_gc_active(), "not reentrant");
a61af66fc99e Initial load duke parents: diff changeset	1977
a61af66fc99e Initial load duke parents: diff changeset	1978 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	1979 IsGCActiveMark mark;
0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 1311 diff changeset	1980
0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 1311 diff changeset	1981 if (ScavengeBeforeFullGC) {
0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 1311 diff changeset	1982 PSScavenge::invoke_no_policy();
0 a61af66fc99e Initial load duke parents: diff changeset	1983 }
1387 0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 1311 diff changeset	1984
0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 1311 diff changeset	1985 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	1986 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	1987
0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 1311 diff changeset	1988 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	1989 maximum_heap_compaction);
0 a61af66fc99e Initial load duke parents: diff changeset	1990 }
a61af66fc99e Initial load duke parents: diff changeset	1991
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1992 bool ParallelCompactData::region_contains(size_t region_index, HeapWord* addr) {
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1993 size_t addr_region_index = addr_to_region_idx(addr);
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1994 return region_index == addr_region_index;
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.
a61af66fc99e Initial load duke parents: diff changeset	1999 void PSParallelCompact::invoke_no_policy(bool maximum_heap_compaction) {
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()) {
0 a61af66fc99e Initial load duke parents: diff changeset	2004 return;
a61af66fc99e Initial load duke parents: diff changeset	2005 }
a61af66fc99e Initial load duke parents: diff changeset	2006
a61af66fc99e Initial load duke parents: diff changeset	2007 TimeStamp marking_start;
a61af66fc99e Initial load duke parents: diff changeset	2008 TimeStamp compaction_start;
a61af66fc99e Initial load duke parents: diff changeset	2009 TimeStamp collection_exit;
a61af66fc99e Initial load duke parents: diff changeset	2010
a61af66fc99e Initial load duke parents: diff changeset	2011 ParallelScavengeHeap* heap = gc_heap();
a61af66fc99e Initial load duke parents: diff changeset	2012 GCCause::Cause gc_cause = heap->gc_cause();
a61af66fc99e Initial load duke parents: diff changeset	2013 PSYoungGen* young_gen = heap->young_gen();
a61af66fc99e Initial load duke parents: diff changeset	2014 PSOldGen* old_gen = heap->old_gen();
a61af66fc99e Initial load duke parents: diff changeset	2015 PSPermGen* perm_gen = heap->perm_gen();
a61af66fc99e Initial load duke parents: diff changeset	2016 PSAdaptiveSizePolicy* size_policy = heap->size_policy();
a61af66fc99e Initial load duke parents: diff changeset	2017
1387 0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 1311 diff changeset	2018 // 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	2019 // 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	2020 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	2021 heap->collector_policy());
0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 1311 diff changeset	2022
263 12eea04c8b06 6672698: mangle_unused_area() should not remangle the entire heap at each collection. jmasa parents: 210 diff changeset	2023 if (ZapUnusedHeapArea) {
12eea04c8b06 6672698: mangle_unused_area() should not remangle the entire heap at each collection. jmasa parents: 210 diff changeset	2024 // 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	2025 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	2026 }
12eea04c8b06 6672698: mangle_unused_area() should not remangle the entire heap at each collection. jmasa parents: 210 diff changeset	2027
615 c6c601a0f2d6 6797870: Add -XX:+{HeapDump,PrintClassHistogram}{Before,After}FullGC ysr parents: 546 diff changeset	2028 heap->pre_full_gc_dump();
c6c601a0f2d6 6797870: Add -XX:+{HeapDump,PrintClassHistogram}{Before,After}FullGC ysr parents: 546 diff changeset	2029
0 a61af66fc99e Initial load duke parents: diff changeset	2030 _print_phases = PrintGCDetails && PrintParallelOldGCPhaseTimes;
a61af66fc99e Initial load duke parents: diff changeset	2031
a61af66fc99e Initial load duke parents: diff changeset	2032 // Make sure data structures are sane, make the heap parsable, and do other
a61af66fc99e Initial load duke parents: diff changeset	2033 // miscellaneous bookkeeping.
a61af66fc99e Initial load duke parents: diff changeset	2034 PreGCValues pre_gc_values;
a61af66fc99e Initial load duke parents: diff changeset	2035 pre_compact(&pre_gc_values);
a61af66fc99e Initial load duke parents: diff changeset	2036
210 05712c37c828 6676016: ParallelOldGC leaks memory jcoomes parents: 142 diff changeset	2037 // Get the compaction manager reserved for the VM thread.
05712c37c828 6676016: ParallelOldGC leaks memory jcoomes parents: 142 diff changeset	2038 ParCompactionManager* const vmthread_cm =
05712c37c828 6676016: ParallelOldGC leaks memory jcoomes parents: 142 diff changeset	2039 ParCompactionManager::manager_array(gc_task_manager()->workers());
05712c37c828 6676016: ParallelOldGC leaks memory jcoomes parents: 142 diff changeset	2040
0 a61af66fc99e Initial load duke parents: diff changeset	2041 // Place after pre_compact() where the number of invocations is incremented.
a61af66fc99e Initial load duke parents: diff changeset	2042 AdaptiveSizePolicyOutput(size_policy, heap->total_collections());
a61af66fc99e Initial load duke parents: diff changeset	2043
a61af66fc99e Initial load duke parents: diff changeset	2044 {
a61af66fc99e Initial load duke parents: diff changeset	2045 ResourceMark rm;
a61af66fc99e Initial load duke parents: diff changeset	2046 HandleMark hm;
a61af66fc99e Initial load duke parents: diff changeset	2047
4095 bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 3979 diff changeset	2048 // 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	2049 gc_task_manager()->set_active_gang();
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 3979 diff changeset	2050 gc_task_manager()->task_idle_workers();
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 3979 diff changeset	2051 heap->set_par_threads(gc_task_manager()->active_workers());
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 3979 diff changeset	2052
0 a61af66fc99e Initial load duke parents: diff changeset	2053 const bool is_system_gc = gc_cause == GCCause::_java_lang_system_gc;
a61af66fc99e Initial load duke parents: diff changeset	2054
a61af66fc99e Initial load duke parents: diff changeset	2055 // This is useful for debugging but don't change the output the
a61af66fc99e Initial load duke parents: diff changeset	2056 // the customer sees.
a61af66fc99e Initial load duke parents: diff changeset	2057 const char* gc_cause_str = "Full GC";
a61af66fc99e Initial load duke parents: diff changeset	2058 if (is_system_gc && PrintGCDetails) {
a61af66fc99e Initial load duke parents: diff changeset	2059 gc_cause_str = "Full GC (System)";
a61af66fc99e Initial load duke parents: diff changeset	2060 }
a61af66fc99e Initial load duke parents: diff changeset	2061 gclog_or_tty->date_stamp(PrintGC && PrintGCDateStamps);
a61af66fc99e Initial load duke parents: diff changeset	2062 TraceCPUTime tcpu(PrintGCDetails, true, gclog_or_tty);
a61af66fc99e Initial load duke parents: diff changeset	2063 TraceTime t1(gc_cause_str, PrintGC, !PrintGCDetails, gclog_or_tty);
a61af66fc99e Initial load duke parents: diff changeset	2064 TraceCollectorStats tcs(counters());
3356 78542e2b5e35 7036199: Adding a notification to the implementation of GarbageCollectorMXBeans fparain parents: 3251 diff changeset	2065 TraceMemoryManagerStats tms(true /* Full GC */,gc_cause);
0 a61af66fc99e Initial load duke parents: diff changeset	2066
a61af66fc99e Initial load duke parents: diff changeset	2067 if (TraceGen1Time) accumulated_time()->start();
a61af66fc99e Initial load duke parents: diff changeset	2068
a61af66fc99e Initial load duke parents: diff changeset	2069 // Let the size policy know we're starting
a61af66fc99e Initial load duke parents: diff changeset	2070 size_policy->major_collection_begin();
a61af66fc99e Initial load duke parents: diff changeset	2071
a61af66fc99e Initial load duke parents: diff changeset	2072 // When collecting the permanent generation methodOops may be moving,
a61af66fc99e Initial load duke parents: diff changeset	2073 // so we either have to flush all bcp data or convert it into bci.
a61af66fc99e Initial load duke parents: diff changeset	2074 CodeCache::gc_prologue();
a61af66fc99e Initial load duke parents: diff changeset	2075 Threads::gc_prologue();
a61af66fc99e Initial load duke parents: diff changeset	2076
a61af66fc99e Initial load duke parents: diff changeset	2077 COMPILER2_PRESENT(DerivedPointerTable::clear());
a61af66fc99e Initial load duke parents: diff changeset	2078
3979 4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3915 diff changeset	2079 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	2080 ref_processor()->setup_policy(maximum_heap_compaction);
0 a61af66fc99e Initial load duke parents: diff changeset	2081
a61af66fc99e Initial load duke parents: diff changeset	2082 bool marked_for_unloading = false;
a61af66fc99e Initial load duke parents: diff changeset	2083
a61af66fc99e Initial load duke parents: diff changeset	2084 marking_start.update();
210 05712c37c828 6676016: ParallelOldGC leaks memory jcoomes parents: 142 diff changeset	2085 marking_phase(vmthread_cm, maximum_heap_compaction);
0 a61af66fc99e Initial load duke parents: diff changeset	2086
a61af66fc99e Initial load duke parents: diff changeset	2087 #ifndef PRODUCT
a61af66fc99e Initial load duke parents: diff changeset	2088 if (TraceParallelOldGCMarkingPhase) {
a61af66fc99e Initial load duke parents: diff changeset	2089 gclog_or_tty->print_cr("marking_phase: cas_tries %d cas_retries %d "
a61af66fc99e Initial load duke parents: diff changeset	2090 "cas_by_another %d",
a61af66fc99e Initial load duke parents: diff changeset	2091 mark_bitmap()->cas_tries(), mark_bitmap()->cas_retries(),
a61af66fc99e Initial load duke parents: diff changeset	2092 mark_bitmap()->cas_by_another());
a61af66fc99e Initial load duke parents: diff changeset	2093 }
a61af66fc99e Initial load duke parents: diff changeset	2094 #endif // #ifndef PRODUCT
a61af66fc99e Initial load duke parents: diff changeset	2095
a61af66fc99e Initial load duke parents: diff changeset	2096 bool max_on_system_gc = UseMaximumCompactionOnSystemGC && is_system_gc;
210 05712c37c828 6676016: ParallelOldGC leaks memory jcoomes parents: 142 diff changeset	2097 summary_phase(vmthread_cm, maximum_heap_compaction \|\| max_on_system_gc);
0 a61af66fc99e Initial load duke parents: diff changeset	2098
a61af66fc99e Initial load duke parents: diff changeset	2099 COMPILER2_PRESENT(assert(DerivedPointerTable::is_active(), "Sanity"));
a61af66fc99e Initial load duke parents: diff changeset	2100 COMPILER2_PRESENT(DerivedPointerTable::set_active(false));
a61af66fc99e Initial load duke parents: diff changeset	2101
a61af66fc99e Initial load duke parents: diff changeset	2102 // adjust_roots() updates Universe::_intArrayKlassObj which is
a61af66fc99e Initial load duke parents: diff changeset	2103 // needed by the compaction for filling holes in the dense prefix.
a61af66fc99e Initial load duke parents: diff changeset	2104 adjust_roots();
a61af66fc99e Initial load duke parents: diff changeset	2105
a61af66fc99e Initial load duke parents: diff changeset	2106 compaction_start.update();
a61af66fc99e Initial load duke parents: diff changeset	2107 // Does the perm gen always have to be done serially because
a61af66fc99e Initial load duke parents: diff changeset	2108 // klasses are used in the update of an object?
210 05712c37c828 6676016: ParallelOldGC leaks memory jcoomes parents: 142 diff changeset	2109 compact_perm(vmthread_cm);
0 a61af66fc99e Initial load duke parents: diff changeset	2110
3251 eda9eb483d29 6841742: par compact - remove unused/unsupported options jcoomes parents: 2369 diff changeset	2111 compact();
0 a61af66fc99e Initial load duke parents: diff changeset	2112
a61af66fc99e Initial load duke parents: diff changeset	2113 // Reset the mark bitmap, summary data, and do other bookkeeping. Must be
a61af66fc99e Initial load duke parents: diff changeset	2114 // done before resizing.
a61af66fc99e Initial load duke parents: diff changeset	2115 post_compact();
a61af66fc99e Initial load duke parents: diff changeset	2116
a61af66fc99e Initial load duke parents: diff changeset	2117 // Let the size policy know we're done
a61af66fc99e Initial load duke parents: diff changeset	2118 size_policy->major_collection_end(old_gen->used_in_bytes(), gc_cause);
a61af66fc99e Initial load duke parents: diff changeset	2119
a61af66fc99e Initial load duke parents: diff changeset	2120 if (UseAdaptiveSizePolicy) {
a61af66fc99e Initial load duke parents: diff changeset	2121 if (PrintAdaptiveSizePolicy) {
a61af66fc99e Initial load duke parents: diff changeset	2122 gclog_or_tty->print("AdaptiveSizeStart: ");
a61af66fc99e Initial load duke parents: diff changeset	2123 gclog_or_tty->stamp();
a61af66fc99e Initial load duke parents: diff changeset	2124 gclog_or_tty->print_cr(" collection: %d ",
a61af66fc99e Initial load duke parents: diff changeset	2125 heap->total_collections());
a61af66fc99e Initial load duke parents: diff changeset	2126 if (Verbose) {
a61af66fc99e Initial load duke parents: diff changeset	2127 gclog_or_tty->print("old_gen_capacity: %d young_gen_capacity: %d"
a61af66fc99e Initial load duke parents: diff changeset	2128 " perm_gen_capacity: %d ",
a61af66fc99e Initial load duke parents: diff changeset	2129 old_gen->capacity_in_bytes(), young_gen->capacity_in_bytes(),
a61af66fc99e Initial load duke parents: diff changeset	2130 perm_gen->capacity_in_bytes());
a61af66fc99e Initial load duke parents: diff changeset	2131 }
a61af66fc99e Initial load duke parents: diff changeset	2132 }
a61af66fc99e Initial load duke parents: diff changeset	2133
a61af66fc99e Initial load duke parents: diff changeset	2134 // Don't check if the size_policy is ready here. Let
a61af66fc99e Initial load duke parents: diff changeset	2135 // the size_policy check that internally.
a61af66fc99e Initial load duke parents: diff changeset	2136 if (UseAdaptiveGenerationSizePolicyAtMajorCollection &&
a61af66fc99e Initial load duke parents: diff changeset	2137 ((gc_cause != GCCause::_java_lang_system_gc) \|\|
a61af66fc99e Initial load duke parents: diff changeset	2138 UseAdaptiveSizePolicyWithSystemGC)) {
a61af66fc99e Initial load duke parents: diff changeset	2139 // Calculate optimal free space amounts
a61af66fc99e Initial load duke parents: diff changeset	2140 assert(young_gen->max_size() >
a61af66fc99e Initial load duke parents: diff changeset	2141 young_gen->from_space()->capacity_in_bytes() +
a61af66fc99e Initial load duke parents: diff changeset	2142 young_gen->to_space()->capacity_in_bytes(),
a61af66fc99e Initial load duke parents: diff changeset	2143 "Sizes of space in young gen are out-of-bounds");
a61af66fc99e Initial load duke parents: diff changeset	2144 size_t max_eden_size = young_gen->max_size() -
a61af66fc99e Initial load duke parents: diff changeset	2145 young_gen->from_space()->capacity_in_bytes() -
a61af66fc99e Initial load duke parents: diff changeset	2146 young_gen->to_space()->capacity_in_bytes();
263 12eea04c8b06 6672698: mangle_unused_area() should not remangle the entire heap at each collection. jmasa parents: 210 diff changeset	2147 size_policy->compute_generation_free_space(
12eea04c8b06 6672698: mangle_unused_area() should not remangle the entire heap at each collection. jmasa parents: 210 diff changeset	2148 young_gen->used_in_bytes(),
12eea04c8b06 6672698: mangle_unused_area() should not remangle the entire heap at each collection. jmasa parents: 210 diff changeset	2149 young_gen->eden_space()->used_in_bytes(),
12eea04c8b06 6672698: mangle_unused_area() should not remangle the entire heap at each collection. jmasa parents: 210 diff changeset	2150 old_gen->used_in_bytes(),
12eea04c8b06 6672698: mangle_unused_area() should not remangle the entire heap at each collection. jmasa parents: 210 diff changeset	2151 perm_gen->used_in_bytes(),
12eea04c8b06 6672698: mangle_unused_area() should not remangle the entire heap at each collection. jmasa parents: 210 diff changeset	2152 young_gen->eden_space()->capacity_in_bytes(),
12eea04c8b06 6672698: mangle_unused_area() should not remangle the entire heap at each collection. jmasa parents: 210 diff changeset	2153 old_gen->max_gen_size(),
12eea04c8b06 6672698: mangle_unused_area() should not remangle the entire heap at each collection. jmasa parents: 210 diff changeset	2154 max_eden_size,
12eea04c8b06 6672698: mangle_unused_area() should not remangle the entire heap at each collection. jmasa parents: 210 diff changeset	2155 true /* full gc*/,
1387 0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 1311 diff changeset	2156 gc_cause,
0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 1311 diff changeset	2157 heap->collector_policy());
263 12eea04c8b06 6672698: mangle_unused_area() should not remangle the entire heap at each collection. jmasa parents: 210 diff changeset	2158
12eea04c8b06 6672698: mangle_unused_area() should not remangle the entire heap at each collection. jmasa parents: 210 diff changeset	2159 heap->resize_old_gen(
12eea04c8b06 6672698: mangle_unused_area() should not remangle the entire heap at each collection. jmasa parents: 210 diff changeset	2160 size_policy->calculated_old_free_size_in_bytes());
0 a61af66fc99e Initial load duke parents: diff changeset	2161
a61af66fc99e Initial load duke parents: diff changeset	2162 // Don't resize the young generation at an major collection. A
a61af66fc99e Initial load duke parents: diff changeset	2163 // desired young generation size may have been calculated but
a61af66fc99e Initial load duke parents: diff changeset	2164 // resizing the young generation complicates the code because the
a61af66fc99e Initial load duke parents: diff changeset	2165 // resizing of the old generation may have moved the boundary
a61af66fc99e Initial load duke parents: diff changeset	2166 // between the young generation and the old generation. Let the
a61af66fc99e Initial load duke parents: diff changeset	2167 // young generation resizing happen at the minor collections.
a61af66fc99e Initial load duke parents: diff changeset	2168 }
a61af66fc99e Initial load duke parents: diff changeset	2169 if (PrintAdaptiveSizePolicy) {
a61af66fc99e Initial load duke parents: diff changeset	2170 gclog_or_tty->print_cr("AdaptiveSizeStop: collection: %d ",
a61af66fc99e Initial load duke parents: diff changeset	2171 heap->total_collections());
a61af66fc99e Initial load duke parents: diff changeset	2172 }
a61af66fc99e Initial load duke parents: diff changeset	2173 }
a61af66fc99e Initial load duke parents: diff changeset	2174
a61af66fc99e Initial load duke parents: diff changeset	2175 if (UsePerfData) {
a61af66fc99e Initial load duke parents: diff changeset	2176 PSGCAdaptivePolicyCounters* const counters = heap->gc_policy_counters();
a61af66fc99e Initial load duke parents: diff changeset	2177 counters->update_counters();
a61af66fc99e Initial load duke parents: diff changeset	2178 counters->update_old_capacity(old_gen->capacity_in_bytes());
a61af66fc99e Initial load duke parents: diff changeset	2179 counters->update_young_capacity(young_gen->capacity_in_bytes());
a61af66fc99e Initial load duke parents: diff changeset	2180 }
a61af66fc99e Initial load duke parents: diff changeset	2181
a61af66fc99e Initial load duke parents: diff changeset	2182 heap->resize_all_tlabs();
a61af66fc99e Initial load duke parents: diff changeset	2183
a61af66fc99e Initial load duke parents: diff changeset	2184 // We collected the perm gen, so we'll resize it here.
a61af66fc99e Initial load duke parents: diff changeset	2185 perm_gen->compute_new_size(pre_gc_values.perm_gen_used());
a61af66fc99e Initial load duke parents: diff changeset	2186
a61af66fc99e Initial load duke parents: diff changeset	2187 if (TraceGen1Time) accumulated_time()->stop();
a61af66fc99e Initial load duke parents: diff changeset	2188
a61af66fc99e Initial load duke parents: diff changeset	2189 if (PrintGC) {
a61af66fc99e Initial load duke parents: diff changeset	2190 if (PrintGCDetails) {
a61af66fc99e Initial load duke parents: diff changeset	2191 // No GC timestamp here. This is after GC so it would be confusing.
a61af66fc99e Initial load duke parents: diff changeset	2192 young_gen->print_used_change(pre_gc_values.young_gen_used());
a61af66fc99e Initial load duke parents: diff changeset	2193 old_gen->print_used_change(pre_gc_values.old_gen_used());
a61af66fc99e Initial load duke parents: diff changeset	2194 heap->print_heap_change(pre_gc_values.heap_used());
a61af66fc99e Initial load duke parents: diff changeset	2195 // Print perm gen last (print_heap_change() excludes the perm gen).
a61af66fc99e Initial load duke parents: diff changeset	2196 perm_gen->print_used_change(pre_gc_values.perm_gen_used());
a61af66fc99e Initial load duke parents: diff changeset	2197 } else {
a61af66fc99e Initial load duke parents: diff changeset	2198 heap->print_heap_change(pre_gc_values.heap_used());
a61af66fc99e Initial load duke parents: diff changeset	2199 }
a61af66fc99e Initial load duke parents: diff changeset	2200 }
a61af66fc99e Initial load duke parents: diff changeset	2201
a61af66fc99e Initial load duke parents: diff changeset	2202 // Track memory usage and detect low memory
a61af66fc99e Initial load duke parents: diff changeset	2203 MemoryService::track_memory_usage();
a61af66fc99e Initial load duke parents: diff changeset	2204 heap->update_counters();
4095 bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 3979 diff changeset	2205 gc_task_manager()->release_idle_workers();
0 a61af66fc99e Initial load duke parents: diff changeset	2206 }
a61af66fc99e Initial load duke parents: diff changeset	2207
1836 894b1d7c7e01 6423256: GC stacks should use a better data structure jcoomes parents: 1833 diff changeset	2208 #ifdef ASSERT
894b1d7c7e01 6423256: GC stacks should use a better data structure jcoomes parents: 1833 diff changeset	2209 for (size_t i = 0; i < ParallelGCThreads + 1; ++i) {
894b1d7c7e01 6423256: GC stacks should use a better data structure jcoomes parents: 1833 diff changeset	2210 ParCompactionManager* const cm =
894b1d7c7e01 6423256: GC stacks should use a better data structure jcoomes parents: 1833 diff changeset	2211 ParCompactionManager::manager_array(int(i));
894b1d7c7e01 6423256: GC stacks should use a better data structure jcoomes parents: 1833 diff changeset	2212 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	2213 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	2214 assert(cm->revisit_klass_stack()->is_empty(), "should be empty");
894b1d7c7e01 6423256: GC stacks should use a better data structure jcoomes parents: 1833 diff changeset	2215 }
894b1d7c7e01 6423256: GC stacks should use a better data structure jcoomes parents: 1833 diff changeset	2216 #endif // ASSERT
894b1d7c7e01 6423256: GC stacks should use a better data structure jcoomes parents: 1833 diff changeset	2217
0 a61af66fc99e Initial load duke parents: diff changeset	2218 if (VerifyAfterGC && heap->total_collections() >= VerifyGCStartAt) {
a61af66fc99e Initial load duke parents: diff changeset	2219 HandleMark hm; // Discard invalid handles created during verification
a61af66fc99e Initial load duke parents: diff changeset	2220 gclog_or_tty->print(" VerifyAfterGC:");
a61af66fc99e Initial load duke parents: diff changeset	2221 Universe::verify(false);
a61af66fc99e Initial load duke parents: diff changeset	2222 }
a61af66fc99e Initial load duke parents: diff changeset	2223
a61af66fc99e Initial load duke parents: diff changeset	2224 // Re-verify object start arrays
a61af66fc99e Initial load duke parents: diff changeset	2225 if (VerifyObjectStartArray &&
a61af66fc99e Initial load duke parents: diff changeset	2226 VerifyAfterGC) {
a61af66fc99e Initial load duke parents: diff changeset	2227 old_gen->verify_object_start_array();
a61af66fc99e Initial load duke parents: diff changeset	2228 perm_gen->verify_object_start_array();
a61af66fc99e Initial load duke parents: diff changeset	2229 }
a61af66fc99e Initial load duke parents: diff changeset	2230
263 12eea04c8b06 6672698: mangle_unused_area() should not remangle the entire heap at each collection. jmasa parents: 210 diff changeset	2231 if (ZapUnusedHeapArea) {
12eea04c8b06 6672698: mangle_unused_area() should not remangle the entire heap at each collection. jmasa parents: 210 diff changeset	2232 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	2233 perm_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	2234 }
12eea04c8b06 6672698: mangle_unused_area() should not remangle the entire heap at each collection. jmasa parents: 210 diff changeset	2235
0 a61af66fc99e Initial load duke parents: diff changeset	2236 NOT_PRODUCT(ref_processor()->verify_no_references_recorded());
a61af66fc99e Initial load duke parents: diff changeset	2237
a61af66fc99e Initial load duke parents: diff changeset	2238 collection_exit.update();
a61af66fc99e Initial load duke parents: diff changeset	2239
a61af66fc99e Initial load duke parents: diff changeset	2240 if (PrintHeapAtGC) {
a61af66fc99e Initial load duke parents: diff changeset	2241 Universe::print_heap_after_gc();
a61af66fc99e Initial load duke parents: diff changeset	2242 }
a61af66fc99e Initial load duke parents: diff changeset	2243 if (PrintGCTaskTimeStamps) {
a61af66fc99e Initial load duke parents: diff changeset	2244 gclog_or_tty->print_cr("VM-Thread " INT64_FORMAT " " INT64_FORMAT " "
a61af66fc99e Initial load duke parents: diff changeset	2245 INT64_FORMAT,
a61af66fc99e Initial load duke parents: diff changeset	2246 marking_start.ticks(), compaction_start.ticks(),
a61af66fc99e Initial load duke parents: diff changeset	2247 collection_exit.ticks());
a61af66fc99e Initial load duke parents: diff changeset	2248 gc_task_manager()->print_task_time_stamps();
a61af66fc99e Initial load duke parents: diff changeset	2249 }
546 05c6d52fa7a9 6690928: Use spinning in combination with yields for workstealing termination. jmasa parents: 496 diff changeset	2250
615 c6c601a0f2d6 6797870: Add -XX:+{HeapDump,PrintClassHistogram}{Before,After}FullGC ysr parents: 546 diff changeset	2251 heap->post_full_gc_dump();
c6c601a0f2d6 6797870: Add -XX:+{HeapDump,PrintClassHistogram}{Before,After}FullGC ysr parents: 546 diff changeset	2252
546 05c6d52fa7a9 6690928: Use spinning in combination with yields for workstealing termination. jmasa parents: 496 diff changeset	2253 #ifdef TRACESPINNING
05c6d52fa7a9 6690928: Use spinning in combination with yields for workstealing termination. jmasa parents: 496 diff changeset	2254 ParallelTaskTerminator::print_termination_counts();
05c6d52fa7a9 6690928: Use spinning in combination with yields for workstealing termination. jmasa parents: 496 diff changeset	2255 #endif
0 a61af66fc99e Initial load duke parents: diff changeset	2256 }
a61af66fc99e Initial load duke parents: diff changeset	2257
a61af66fc99e Initial load duke parents: diff changeset	2258 bool PSParallelCompact::absorb_live_data_from_eden(PSAdaptiveSizePolicy* size_policy,
a61af66fc99e Initial load duke parents: diff changeset	2259 PSYoungGen* young_gen,
a61af66fc99e Initial load duke parents: diff changeset	2260 PSOldGen* old_gen) {
a61af66fc99e Initial load duke parents: diff changeset	2261 MutableSpace* const eden_space = young_gen->eden_space();
a61af66fc99e Initial load duke parents: diff changeset	2262 assert(!eden_space->is_empty(), "eden must be non-empty");
a61af66fc99e Initial load duke parents: diff changeset	2263 assert(young_gen->virtual_space()->alignment() ==
a61af66fc99e Initial load duke parents: diff changeset	2264 old_gen->virtual_space()->alignment(), "alignments do not match");
a61af66fc99e Initial load duke parents: diff changeset	2265
a61af66fc99e Initial load duke parents: diff changeset	2266 if (!(UseAdaptiveSizePolicy && UseAdaptiveGCBoundary)) {
a61af66fc99e Initial load duke parents: diff changeset	2267 return false;
a61af66fc99e Initial load duke parents: diff changeset	2268 }
a61af66fc99e Initial load duke parents: diff changeset	2269
a61af66fc99e Initial load duke parents: diff changeset	2270 // Both generations must be completely committed.
a61af66fc99e Initial load duke parents: diff changeset	2271 if (young_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 if (old_gen->virtual_space()->uncommitted_size() != 0) {
a61af66fc99e Initial load duke parents: diff changeset	2275 return false;
a61af66fc99e Initial load duke parents: diff changeset	2276 }
a61af66fc99e Initial load duke parents: diff changeset	2277
a61af66fc99e Initial load duke parents: diff changeset	2278 // Figure out how much to take from eden. Include the average amount promoted
a61af66fc99e Initial load duke parents: diff changeset	2279 // in the total; otherwise the next young gen GC will simply bail out to a
a61af66fc99e Initial load duke parents: diff changeset	2280 // full GC.
a61af66fc99e Initial load duke parents: diff changeset	2281 const size_t alignment = old_gen->virtual_space()->alignment();
a61af66fc99e Initial load duke parents: diff changeset	2282 const size_t eden_used = eden_space->used_in_bytes();
a61af66fc99e Initial load duke parents: diff changeset	2283 const size_t promoted = (size_t)size_policy->avg_promoted()->padded_average();
a61af66fc99e Initial load duke parents: diff changeset	2284 const size_t absorb_size = align_size_up(eden_used + promoted, alignment);
a61af66fc99e Initial load duke parents: diff changeset	2285 const size_t eden_capacity = eden_space->capacity_in_bytes();
a61af66fc99e Initial load duke parents: diff changeset	2286
a61af66fc99e Initial load duke parents: diff changeset	2287 if (absorb_size >= eden_capacity) {
a61af66fc99e Initial load duke parents: diff changeset	2288 return false; // Must leave some space in eden.
a61af66fc99e Initial load duke parents: diff changeset	2289 }
a61af66fc99e Initial load duke parents: diff changeset	2290
a61af66fc99e Initial load duke parents: diff changeset	2291 const size_t new_young_size = young_gen->capacity_in_bytes() - absorb_size;
a61af66fc99e Initial load duke parents: diff changeset	2292 if (new_young_size < young_gen->min_gen_size()) {
a61af66fc99e Initial load duke parents: diff changeset	2293 return false; // Respect young gen minimum size.
a61af66fc99e Initial load duke parents: diff changeset	2294 }
a61af66fc99e Initial load duke parents: diff changeset	2295
a61af66fc99e Initial load duke parents: diff changeset	2296 if (TraceAdaptiveGCBoundary && Verbose) {
a61af66fc99e Initial load duke parents: diff changeset	2297 gclog_or_tty->print(" absorbing " SIZE_FORMAT "K: "
a61af66fc99e Initial load duke parents: diff changeset	2298 "eden " SIZE_FORMAT "K->" SIZE_FORMAT "K "
a61af66fc99e Initial load duke parents: diff changeset	2299 "from " SIZE_FORMAT "K, to " SIZE_FORMAT "K "
a61af66fc99e Initial load duke parents: diff changeset	2300 "young_gen " SIZE_FORMAT "K->" SIZE_FORMAT "K ",
a61af66fc99e Initial load duke parents: diff changeset	2301 absorb_size / K,
a61af66fc99e Initial load duke parents: diff changeset	2302 eden_capacity / K, (eden_capacity - absorb_size) / K,
a61af66fc99e Initial load duke parents: diff changeset	2303 young_gen->from_space()->used_in_bytes() / K,
a61af66fc99e Initial load duke parents: diff changeset	2304 young_gen->to_space()->used_in_bytes() / K,
a61af66fc99e Initial load duke parents: diff changeset	2305 young_gen->capacity_in_bytes() / K, new_young_size / K);
a61af66fc99e Initial load duke parents: diff changeset	2306 }
a61af66fc99e Initial load duke parents: diff changeset	2307
a61af66fc99e Initial load duke parents: diff changeset	2308 // Fill the unused part of the old gen.
a61af66fc99e Initial load duke parents: diff changeset	2309 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	2310 HeapWord* const unused_start = old_space->top();
7d7a7c599c17 6578152: fill_region_with_object has usability and safety issues jcoomes parents: 457 diff changeset	2311 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	2312
7d7a7c599c17 6578152: fill_region_with_object has usability and safety issues jcoomes parents: 457 diff changeset	2313 if (unused_words > 0) {
7d7a7c599c17 6578152: fill_region_with_object has usability and safety issues jcoomes parents: 457 diff changeset	2314 if (unused_words < CollectedHeap::min_fill_size()) {
7d7a7c599c17 6578152: fill_region_with_object has usability and safety issues jcoomes parents: 457 diff changeset	2315 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	2316 }
7d7a7c599c17 6578152: fill_region_with_object has usability and safety issues jcoomes parents: 457 diff changeset	2317 CollectedHeap::fill_with_objects(unused_start, unused_words);
0 a61af66fc99e Initial load duke parents: diff changeset	2318 }
a61af66fc99e Initial load duke parents: diff changeset	2319
a61af66fc99e Initial load duke parents: diff changeset	2320 // Take the live data from eden and set both top and end in the old gen to
a61af66fc99e Initial load duke parents: diff changeset	2321 // eden top. (Need to set end because reset_after_change() mangles the region
a61af66fc99e Initial load duke parents: diff changeset	2322 // from end to virtual_space->high() in debug builds).
a61af66fc99e Initial load duke parents: diff changeset	2323 HeapWord* const new_top = eden_space->top();
a61af66fc99e Initial load duke parents: diff changeset	2324 old_gen->virtual_space()->expand_into(young_gen->virtual_space(),
a61af66fc99e Initial load duke parents: diff changeset	2325 absorb_size);
a61af66fc99e Initial load duke parents: diff changeset	2326 young_gen->reset_after_change();
a61af66fc99e Initial load duke parents: diff changeset	2327 old_space->set_top(new_top);
a61af66fc99e Initial load duke parents: diff changeset	2328 old_space->set_end(new_top);
a61af66fc99e Initial load duke parents: diff changeset	2329 old_gen->reset_after_change();
a61af66fc99e Initial load duke parents: diff changeset	2330
a61af66fc99e Initial load duke parents: diff changeset	2331 // Update the object start array for the filler object and the data from eden.
a61af66fc99e Initial load duke parents: diff changeset	2332 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	2333 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	2334 start_array->allocate_block(p);
0 a61af66fc99e Initial load duke parents: diff changeset	2335 }
a61af66fc99e Initial load duke parents: diff changeset	2336
a61af66fc99e Initial load duke parents: diff changeset	2337 // Could update the promoted average here, but it is not typically updated at
a61af66fc99e Initial load duke parents: diff changeset	2338 // full GCs and the value to use is unclear. Something like
a61af66fc99e Initial load duke parents: diff changeset	2339 //
a61af66fc99e Initial load duke parents: diff changeset	2340 // cur_promoted_avg + absorb_size / number_of_scavenges_since_last_full_gc.
a61af66fc99e Initial load duke parents: diff changeset	2341
a61af66fc99e Initial load duke parents: diff changeset	2342 size_policy->set_bytes_absorbed_from_eden(absorb_size);
a61af66fc99e Initial load duke parents: diff changeset	2343 return true;
a61af66fc99e Initial load duke parents: diff changeset	2344 }
a61af66fc99e Initial load duke parents: diff changeset	2345
a61af66fc99e Initial load duke parents: diff changeset	2346 GCTaskManager* const PSParallelCompact::gc_task_manager() {
a61af66fc99e Initial load duke parents: diff changeset	2347 assert(ParallelScavengeHeap::gc_task_manager() != NULL,
a61af66fc99e Initial load duke parents: diff changeset	2348 "shouldn't return NULL");
a61af66fc99e Initial load duke parents: diff changeset	2349 return ParallelScavengeHeap::gc_task_manager();
a61af66fc99e Initial load duke parents: diff changeset	2350 }
a61af66fc99e Initial load duke parents: diff changeset	2351
a61af66fc99e Initial load duke parents: diff changeset	2352 void PSParallelCompact::marking_phase(ParCompactionManager* cm,
a61af66fc99e Initial load duke parents: diff changeset	2353 bool maximum_heap_compaction) {
a61af66fc99e Initial load duke parents: diff changeset	2354 // Recursively traverse all live objects and mark them
a61af66fc99e Initial load duke parents: diff changeset	2355 EventMark m("1 mark object");
a61af66fc99e Initial load duke parents: diff changeset	2356 TraceTime tm("marking phase", print_phases(), true, gclog_or_tty);
a61af66fc99e Initial load duke parents: diff changeset	2357
a61af66fc99e Initial load duke parents: diff changeset	2358 ParallelScavengeHeap* heap = gc_heap();
a61af66fc99e Initial load duke parents: diff changeset	2359 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	2360 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	2361 TaskQueueSetSuper* qset = ParCompactionManager::region_array();
4095 bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 3979 diff changeset	2362 ParallelTaskTerminator terminator(active_gc_threads, qset);
0 a61af66fc99e Initial load duke parents: diff changeset	2363
a61af66fc99e Initial load duke parents: diff changeset	2364 PSParallelCompact::MarkAndPushClosure mark_and_push_closure(cm);
a61af66fc99e Initial load duke parents: diff changeset	2365 PSParallelCompact::FollowStackClosure follow_stack_closure(cm);
a61af66fc99e Initial load duke parents: diff changeset	2366
a61af66fc99e Initial load duke parents: diff changeset	2367 {
a61af66fc99e Initial load duke parents: diff changeset	2368 TraceTime tm_m("par mark", print_phases(), true, gclog_or_tty);
989 148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 696 diff changeset	2369 ParallelScavengeHeap::ParStrongRootsScope psrs;
0 a61af66fc99e Initial load duke parents: diff changeset	2370
a61af66fc99e Initial load duke parents: diff changeset	2371 GCTaskQueue* q = GCTaskQueue::create();
a61af66fc99e Initial load duke parents: diff changeset	2372
a61af66fc99e Initial load duke parents: diff changeset	2373 q->enqueue(new MarkFromRootsTask(MarkFromRootsTask::universe));
a61af66fc99e Initial load duke parents: diff changeset	2374 q->enqueue(new MarkFromRootsTask(MarkFromRootsTask::jni_handles));
a61af66fc99e Initial load duke parents: diff changeset	2375 // We scan the thread roots in parallel
a61af66fc99e Initial load duke parents: diff changeset	2376 Threads::create_thread_roots_marking_tasks(q);
a61af66fc99e Initial load duke parents: diff changeset	2377 q->enqueue(new MarkFromRootsTask(MarkFromRootsTask::object_synchronizer));
a61af66fc99e Initial load duke parents: diff changeset	2378 q->enqueue(new MarkFromRootsTask(MarkFromRootsTask::flat_profiler));
a61af66fc99e Initial load duke parents: diff changeset	2379 q->enqueue(new MarkFromRootsTask(MarkFromRootsTask::management));
a61af66fc99e Initial load duke parents: diff changeset	2380 q->enqueue(new MarkFromRootsTask(MarkFromRootsTask::system_dictionary));
a61af66fc99e Initial load duke parents: diff changeset	2381 q->enqueue(new MarkFromRootsTask(MarkFromRootsTask::jvmti));
989 148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 696 diff changeset	2382 q->enqueue(new MarkFromRootsTask(MarkFromRootsTask::code_cache));
0 a61af66fc99e Initial load duke parents: diff changeset	2383
4095 bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 3979 diff changeset	2384 if (active_gc_threads > 1) {
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 3979 diff changeset	2385 for (uint j = 0; j < active_gc_threads; j++) {
0 a61af66fc99e Initial load duke parents: diff changeset	2386 q->enqueue(new StealMarkingTask(&terminator));
a61af66fc99e Initial load duke parents: diff changeset	2387 }
a61af66fc99e Initial load duke parents: diff changeset	2388 }
a61af66fc99e Initial load duke parents: diff changeset	2389
4095 bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 3979 diff changeset	2390 gc_task_manager()->execute_and_wait(q);
0 a61af66fc99e Initial load duke parents: diff changeset	2391 }
a61af66fc99e Initial load duke parents: diff changeset	2392
a61af66fc99e Initial load duke parents: diff changeset	2393 // Process reference objects found during marking
a61af66fc99e Initial load duke parents: diff changeset	2394 {
a61af66fc99e Initial load duke parents: diff changeset	2395 TraceTime tm_r("reference processing", print_phases(), true, gclog_or_tty);
a61af66fc99e Initial load duke parents: diff changeset	2396 if (ref_processor()->processing_is_mt()) {
a61af66fc99e Initial load duke parents: diff changeset	2397 RefProcTaskExecutor task_executor;
a61af66fc99e Initial load duke parents: diff changeset	2398 ref_processor()->process_discovered_references(
453 c96030fff130 6684579: SoftReference processing can be made more efficient ysr parents: 376 diff changeset	2399 is_alive_closure(), &mark_and_push_closure, &follow_stack_closure,
c96030fff130 6684579: SoftReference processing can be made more efficient ysr parents: 376 diff changeset	2400 &task_executor);
0 a61af66fc99e Initial load duke parents: diff changeset	2401 } else {
a61af66fc99e Initial load duke parents: diff changeset	2402 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, NULL);
0 a61af66fc99e Initial load duke parents: diff changeset	2404 }
a61af66fc99e Initial load duke parents: diff changeset	2405 }
a61af66fc99e Initial load duke parents: diff changeset	2406
a61af66fc99e Initial load duke parents: diff changeset	2407 TraceTime tm_c("class unloading", print_phases(), true, gclog_or_tty);
a61af66fc99e Initial load duke parents: diff changeset	2408 // Follow system dictionary roots and unload classes.
a61af66fc99e Initial load duke parents: diff changeset	2409 bool purged_class = SystemDictionary::do_unloading(is_alive_closure());
a61af66fc99e Initial load duke parents: diff changeset	2410
a61af66fc99e Initial load duke parents: diff changeset	2411 // Follow code cache roots.
a61af66fc99e Initial load duke parents: diff changeset	2412 CodeCache::do_unloading(is_alive_closure(), &mark_and_push_closure,
a61af66fc99e Initial load duke parents: diff changeset	2413 purged_class);
1311 2a1472c30599 4396719: Mark Sweep stack overflow on deeply nested Object arrays jcoomes parents: 997 diff changeset	2414 cm->follow_marking_stacks(); // Flush marking stack.
0 a61af66fc99e Initial load duke parents: diff changeset	2415
a61af66fc99e Initial load duke parents: diff changeset	2416 // Update subklass/sibling/implementor links of live klasses
a61af66fc99e Initial load duke parents: diff changeset	2417 // revisit_klass_stack is used in follow_weak_klass_links().
941 8b46c4d82093 4957990: Perm heap bloat in JVM ysr parents: 696 diff changeset	2418 follow_weak_klass_links();
8b46c4d82093 4957990: Perm heap bloat in JVM ysr parents: 696 diff changeset	2419
8b46c4d82093 4957990: Perm heap bloat in JVM ysr parents: 696 diff changeset	2420 // Revisit memoized MDO's and clear any unmarked weak refs
8b46c4d82093 4957990: Perm heap bloat in JVM ysr parents: 696 diff changeset	2421 follow_mdo_weak_refs();
0 a61af66fc99e Initial load duke parents: diff changeset	2422
2177 3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 2147 diff changeset	2423 // Visit interned string tables and delete unmarked oops
0 a61af66fc99e Initial load duke parents: diff changeset	2424 StringTable::unlink(is_alive_closure());
2177 3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 2147 diff changeset	2425 // Clean up unreferenced symbols in symbol table.
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 2147 diff changeset	2426 SymbolTable::unlink();
0 a61af66fc99e Initial load duke parents: diff changeset	2427
1311 2a1472c30599 4396719: Mark Sweep stack overflow on deeply nested Object arrays jcoomes parents: 997 diff changeset	2428 assert(cm->marking_stacks_empty(), "marking stacks should be empty");
0 a61af66fc99e Initial load duke parents: diff changeset	2429 }
a61af66fc99e Initial load duke parents: diff changeset	2430
a61af66fc99e Initial load duke parents: diff changeset	2431 // This should be moved to the shared markSweep code!
a61af66fc99e Initial load duke parents: diff changeset	2432 class PSAlwaysTrueClosure: public BoolObjectClosure {
a61af66fc99e Initial load duke parents: diff changeset	2433 public:
a61af66fc99e Initial load duke parents: diff changeset	2434 void do_object(oop p) { ShouldNotReachHere(); }
a61af66fc99e Initial load duke parents: diff changeset	2435 bool do_object_b(oop p) { return true; }
a61af66fc99e Initial load duke parents: diff changeset	2436 };
a61af66fc99e Initial load duke parents: diff changeset	2437 static PSAlwaysTrueClosure always_true;
a61af66fc99e Initial load duke parents: diff changeset	2438
a61af66fc99e Initial load duke parents: diff changeset	2439 void PSParallelCompact::adjust_roots() {
a61af66fc99e Initial load duke parents: diff changeset	2440 // Adjust the pointers to reflect the new locations
a61af66fc99e Initial load duke parents: diff changeset	2441 EventMark m("3 adjust roots");
a61af66fc99e Initial load duke parents: diff changeset	2442 TraceTime tm("adjust roots", print_phases(), true, gclog_or_tty);
a61af66fc99e Initial load duke parents: diff changeset	2443
a61af66fc99e Initial load duke parents: diff changeset	2444 // General strong roots.
a61af66fc99e Initial load duke parents: diff changeset	2445 Universe::oops_do(adjust_root_pointer_closure());
a61af66fc99e Initial load duke parents: diff changeset	2446 JNIHandles::oops_do(adjust_root_pointer_closure()); // Global (strong) JNI handles
989 148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 696 diff changeset	2447 Threads::oops_do(adjust_root_pointer_closure(), NULL);
0 a61af66fc99e Initial load duke parents: diff changeset	2448 ObjectSynchronizer::oops_do(adjust_root_pointer_closure());
a61af66fc99e Initial load duke parents: diff changeset	2449 FlatProfiler::oops_do(adjust_root_pointer_closure());
a61af66fc99e Initial load duke parents: diff changeset	2450 Management::oops_do(adjust_root_pointer_closure());
a61af66fc99e Initial load duke parents: diff changeset	2451 JvmtiExport::oops_do(adjust_root_pointer_closure());
a61af66fc99e Initial load duke parents: diff changeset	2452 // SO_AllClasses
a61af66fc99e Initial load duke parents: diff changeset	2453 SystemDictionary::oops_do(adjust_root_pointer_closure());
a61af66fc99e Initial load duke parents: diff changeset	2454
a61af66fc99e Initial load duke parents: diff changeset	2455 // Now adjust pointers in remaining weak roots. (All of which should
a61af66fc99e Initial load duke parents: diff changeset	2456 // have been cleared if they pointed to non-surviving objects.)
a61af66fc99e Initial load duke parents: diff changeset	2457 // Global (weak) JNI handles
a61af66fc99e Initial load duke parents: diff changeset	2458 JNIHandles::weak_oops_do(&always_true, adjust_root_pointer_closure());
a61af66fc99e Initial load duke parents: diff changeset	2459
a61af66fc99e Initial load duke parents: diff changeset	2460 CodeCache::oops_do(adjust_pointer_closure());
a61af66fc99e Initial load duke parents: diff changeset	2461 StringTable::oops_do(adjust_root_pointer_closure());
a61af66fc99e Initial load duke parents: diff changeset	2462 ref_processor()->weak_oops_do(adjust_root_pointer_closure());
a61af66fc99e Initial load duke parents: diff changeset	2463 // Roots were visited so references into the young gen in roots
a61af66fc99e Initial load duke parents: diff changeset	2464 // may have been scanned. Process them also.
a61af66fc99e Initial load duke parents: diff changeset	2465 // Should the reference processor have a span that excludes
a61af66fc99e Initial load duke parents: diff changeset	2466 // young gen objects?
a61af66fc99e Initial load duke parents: diff changeset	2467 PSScavenge::reference_processor()->weak_oops_do(
a61af66fc99e Initial load duke parents: diff changeset	2468 adjust_root_pointer_closure());
a61af66fc99e Initial load duke parents: diff changeset	2469 }
a61af66fc99e Initial load duke parents: diff changeset	2470
a61af66fc99e Initial load duke parents: diff changeset	2471 void PSParallelCompact::compact_perm(ParCompactionManager* cm) {
a61af66fc99e Initial load duke parents: diff changeset	2472 EventMark m("4 compact perm");
a61af66fc99e Initial load duke parents: diff changeset	2473 TraceTime tm("compact perm gen", print_phases(), true, gclog_or_tty);
a61af66fc99e Initial load duke parents: diff changeset	2474 // trace("4");
a61af66fc99e Initial load duke parents: diff changeset	2475
a61af66fc99e Initial load duke parents: diff changeset	2476 gc_heap()->perm_gen()->start_array()->reset();
a61af66fc99e Initial load duke parents: diff changeset	2477 move_and_update(cm, perm_space_id);
a61af66fc99e Initial load duke parents: diff changeset	2478 }
a61af66fc99e Initial load duke parents: diff changeset	2479
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2480 void PSParallelCompact::enqueue_region_draining_tasks(GCTaskQueue* q,
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2481 uint parallel_gc_threads)
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2482 {
0 a61af66fc99e Initial load duke parents: diff changeset	2483 TraceTime tm("drain task setup", print_phases(), true, gclog_or_tty);
a61af66fc99e Initial load duke parents: diff changeset	2484
4095 bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 3979 diff changeset	2485 // Find the threads that are active
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 3979 diff changeset	2486 unsigned int which = 0;
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 3979 diff changeset	2487
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 3979 diff changeset	2488 const uint task_count = MAX2(parallel_gc_threads, 1U);
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 3979 diff changeset	2489 for (uint j = 0; j < task_count; j++) {
1833 8b10f48633dc 6984287: Regularize how GC parallel workers are specified. jmasa parents: 1638 diff changeset	2490 q->enqueue(new DrainStacksCompactionTask(j));
4095 bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 3979 diff changeset	2491 ParCompactionManager::verify_region_list_empty(j);
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 3979 diff changeset	2492 // 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	2493 // 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	2494 // 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	2495 // a draining stack.
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 3979 diff changeset	2496 ParCompactionManager* cm = ParCompactionManager::manager_array(j);
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 3979 diff changeset	2497 cm->set_region_stack(NULL);
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 3979 diff changeset	2498 cm->set_region_stack_index((uint)max_uintx);
0 a61af66fc99e Initial load duke parents: diff changeset	2499 }
4095 bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 3979 diff changeset	2500 ParCompactionManager::reset_recycled_stack_index();
0 a61af66fc99e Initial load duke parents: diff changeset	2501
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2502 // Find all regions that are available (can be filled immediately) and
0 a61af66fc99e Initial load duke parents: diff changeset	2503 // 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	2504 // order (high to low) so the regions will be removed in ascending order.
0 a61af66fc99e Initial load duke parents: diff changeset	2505
a61af66fc99e Initial load duke parents: diff changeset	2506 const ParallelCompactData& sd = PSParallelCompact::summary_data();
a61af66fc99e Initial load duke parents: diff changeset	2507
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2508 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	2509 // 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	2510 // "which" must be 0 <= which < task_count
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 3979 diff changeset	2511
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 3979 diff changeset	2512 which = 0;
0 a61af66fc99e Initial load duke parents: diff changeset	2513 for (unsigned int id = to_space_id; id > perm_space_id; --id) {
a61af66fc99e Initial load duke parents: diff changeset	2514 SpaceInfo* const space_info = _space_info + id;
a61af66fc99e Initial load duke parents: diff changeset	2515 MutableSpace* const space = space_info->space();
a61af66fc99e Initial load duke parents: diff changeset	2516 HeapWord* const new_top = space_info->new_top();
a61af66fc99e Initial load duke parents: diff changeset	2517
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2518 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	2519 const size_t end_region =
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2520 sd.addr_to_region_idx(sd.region_align_up(new_top));
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2521 assert(end_region > 0, "perm gen cannot be empty");
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2522
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2523 for (size_t cur = end_region - 1; cur >= beg_region; --cur) {
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2524 if (sd.region(cur)->claim_unsafe()) {
4095 bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 3979 diff changeset	2525 ParCompactionManager::region_list_push(which, cur);
0 a61af66fc99e Initial load duke parents: diff changeset	2526
a61af66fc99e Initial load duke parents: diff changeset	2527 if (TraceParallelOldGCCompactionPhase && Verbose) {
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2528 const size_t count_mod_8 = fillable_regions & 7;
0 a61af66fc99e Initial load duke parents: diff changeset	2529 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	2530 gclog_or_tty->print(" " SIZE_FORMAT_W(7), cur);
0 a61af66fc99e Initial load duke parents: diff changeset	2531 if (count_mod_8 == 7) gclog_or_tty->cr();
a61af66fc99e Initial load duke parents: diff changeset	2532 }
a61af66fc99e Initial load duke parents: diff changeset	2533
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2534 NOT_PRODUCT(++fillable_regions;)
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2535
4095 bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 3979 diff changeset	2536 // Assign regions to tasks in round-robin fashion.
0 a61af66fc99e Initial load duke parents: diff changeset	2537 if (++which == task_count) {
4095 bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 3979 diff changeset	2538 assert(which <= parallel_gc_threads,
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 3979 diff changeset	2539 "Inconsistent number of workers");
0 a61af66fc99e Initial load duke parents: diff changeset	2540 which = 0;
a61af66fc99e Initial load duke parents: diff changeset	2541 }
a61af66fc99e Initial load duke parents: diff changeset	2542 }
a61af66fc99e Initial load duke parents: diff changeset	2543 }
a61af66fc99e Initial load duke parents: diff changeset	2544 }
a61af66fc99e Initial load duke parents: diff changeset	2545
a61af66fc99e Initial load duke parents: diff changeset	2546 if (TraceParallelOldGCCompactionPhase) {
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2547 if (Verbose && (fillable_regions & 7) != 0) gclog_or_tty->cr();
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2548 gclog_or_tty->print_cr("%u initially fillable regions", fillable_regions);
0 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 #define PAR_OLD_DENSE_PREFIX_OVER_PARTITIONING 4
a61af66fc99e Initial load duke parents: diff changeset	2553
a61af66fc99e Initial load duke parents: diff changeset	2554 void PSParallelCompact::enqueue_dense_prefix_tasks(GCTaskQueue* q,
a61af66fc99e Initial load duke parents: diff changeset	2555 uint parallel_gc_threads) {
a61af66fc99e Initial load duke parents: diff changeset	2556 TraceTime tm("dense prefix task setup", print_phases(), true, gclog_or_tty);
a61af66fc99e Initial load duke parents: diff changeset	2557
a61af66fc99e Initial load duke parents: diff changeset	2558 ParallelCompactData& sd = PSParallelCompact::summary_data();
a61af66fc99e Initial load duke parents: diff changeset	2559
a61af66fc99e Initial load duke parents: diff changeset	2560 // Iterate over all the spaces adding tasks for updating
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2561 // regions in the dense prefix. Assume that 1 gc thread
0 a61af66fc99e Initial load duke parents: diff changeset	2562 // will work on opening the gaps and the remaining gc threads
a61af66fc99e Initial load duke parents: diff changeset	2563 // will work on the dense prefix.
482 7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	2564 unsigned int space_id;
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	2565 for (space_id = old_space_id; space_id < last_space_id; ++ space_id) {
0 a61af66fc99e Initial load duke parents: diff changeset	2566 HeapWord* const dense_prefix_end = _space_info[space_id].dense_prefix();
a61af66fc99e Initial load duke parents: diff changeset	2567 const MutableSpace* const space = _space_info[space_id].space();
a61af66fc99e Initial load duke parents: diff changeset	2568
a61af66fc99e Initial load duke parents: diff changeset	2569 if (dense_prefix_end == space->bottom()) {
a61af66fc99e Initial load duke parents: diff changeset	2570 // There is no dense prefix for this space.
a61af66fc99e Initial load duke parents: diff changeset	2571 continue;
a61af66fc99e Initial load duke parents: diff changeset	2572 }
a61af66fc99e Initial load duke parents: diff changeset	2573
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2574 // The dense prefix is before this region.
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2575 size_t region_index_end_dense_prefix =
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2576 sd.addr_to_region_idx(dense_prefix_end);
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2577 RegionData* const dense_prefix_cp =
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2578 sd.region(region_index_end_dense_prefix);
0 a61af66fc99e Initial load duke parents: diff changeset	2579 assert(dense_prefix_end == space->end() \|\|
a61af66fc99e Initial load duke parents: diff changeset	2580 dense_prefix_cp->available() \|\|
a61af66fc99e Initial load duke parents: diff changeset	2581 dense_prefix_cp->claimed(),
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2582 "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	2583
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2584 size_t region_index_start = sd.addr_to_region_idx(space->bottom());
0 a61af66fc99e Initial load duke parents: diff changeset	2585
a61af66fc99e Initial load duke parents: diff changeset	2586 // Is there dense prefix work?
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2587 size_t total_dense_prefix_regions =
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2588 region_index_end_dense_prefix - region_index_start;
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2589 // How many regions of the dense prefix should be given to
0 a61af66fc99e Initial load duke parents: diff changeset	2590 // each thread?
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2591 if (total_dense_prefix_regions > 0) {
0 a61af66fc99e Initial load duke parents: diff changeset	2592 uint tasks_for_dense_prefix = 1;
3251 eda9eb483d29 6841742: par compact - remove unused/unsupported options jcoomes parents: 2369 diff changeset	2593 if (total_dense_prefix_regions <=
eda9eb483d29 6841742: par compact - remove unused/unsupported options jcoomes parents: 2369 diff changeset	2594 (parallel_gc_threads * PAR_OLD_DENSE_PREFIX_OVER_PARTITIONING)) {
eda9eb483d29 6841742: par compact - remove unused/unsupported options jcoomes parents: 2369 diff changeset	2595 // Don't over partition. This assumes that
eda9eb483d29 6841742: par compact - remove unused/unsupported options jcoomes parents: 2369 diff changeset	2596 // PAR_OLD_DENSE_PREFIX_OVER_PARTITIONING is a small integer value
eda9eb483d29 6841742: par compact - remove unused/unsupported options jcoomes parents: 2369 diff changeset	2597 // so there are not many regions to process.
eda9eb483d29 6841742: par compact - remove unused/unsupported options jcoomes parents: 2369 diff changeset	2598 tasks_for_dense_prefix = parallel_gc_threads;
eda9eb483d29 6841742: par compact - remove unused/unsupported options jcoomes parents: 2369 diff changeset	2599 } else {
eda9eb483d29 6841742: par compact - remove unused/unsupported options jcoomes parents: 2369 diff changeset	2600 // Over partition
eda9eb483d29 6841742: par compact - remove unused/unsupported options jcoomes parents: 2369 diff changeset	2601 tasks_for_dense_prefix = parallel_gc_threads *
eda9eb483d29 6841742: par compact - remove unused/unsupported options jcoomes parents: 2369 diff changeset	2602 PAR_OLD_DENSE_PREFIX_OVER_PARTITIONING;
0 a61af66fc99e Initial load duke parents: diff changeset	2603 }
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2604 size_t regions_per_thread = total_dense_prefix_regions /
0 a61af66fc99e Initial load duke parents: diff changeset	2605 tasks_for_dense_prefix;
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2606 // Give each thread at least 1 region.
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2607 if (regions_per_thread == 0) {
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2608 regions_per_thread = 1;
0 a61af66fc99e Initial load duke parents: diff changeset	2609 }
a61af66fc99e Initial load duke parents: diff changeset	2610
a61af66fc99e Initial load duke parents: diff changeset	2611 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	2612 if (region_index_start >= region_index_end_dense_prefix) {
0 a61af66fc99e Initial load duke parents: diff changeset	2613 break;
a61af66fc99e Initial load duke parents: diff changeset	2614 }
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2615 // region_index_end is not processed
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2616 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	2617 region_index_end_dense_prefix);
482 7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	2618 q->enqueue(new UpdateDensePrefixTask(SpaceId(space_id),
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	2619 region_index_start,
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	2620 region_index_end));
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2621 region_index_start = region_index_end;
0 a61af66fc99e Initial load duke parents: diff changeset	2622 }
a61af66fc99e Initial load duke parents: diff changeset	2623 }
a61af66fc99e Initial load duke parents: diff changeset	2624 // This gets any part of the dense prefix that did not
a61af66fc99e Initial load duke parents: diff changeset	2625 // fit evenly.
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2626 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	2627 q->enqueue(new UpdateDensePrefixTask(SpaceId(space_id),
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	2628 region_index_start,
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	2629 region_index_end_dense_prefix));
0 a61af66fc99e Initial load duke parents: diff changeset	2630 }
482 7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	2631 }
0 a61af66fc99e Initial load duke parents: diff changeset	2632 }
a61af66fc99e Initial load duke parents: diff changeset	2633
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2634 void PSParallelCompact::enqueue_region_stealing_tasks(
0 a61af66fc99e Initial load duke parents: diff changeset	2635 GCTaskQueue* q,
a61af66fc99e Initial load duke parents: diff changeset	2636 ParallelTaskTerminator* terminator_ptr,
a61af66fc99e Initial load duke parents: diff changeset	2637 uint parallel_gc_threads) {
a61af66fc99e Initial load duke parents: diff changeset	2638 TraceTime tm("steal task setup", print_phases(), true, gclog_or_tty);
a61af66fc99e Initial load duke parents: diff changeset	2639
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2640 // Once a thread has drained it's stack, it should try to steal regions from
0 a61af66fc99e Initial load duke parents: diff changeset	2641 // other threads.
a61af66fc99e Initial load duke parents: diff changeset	2642 if (parallel_gc_threads > 1) {
a61af66fc99e Initial load duke parents: diff changeset	2643 for (uint j = 0; j < parallel_gc_threads; j++) {
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2644 q->enqueue(new StealRegionCompactionTask(terminator_ptr));
0 a61af66fc99e Initial load duke parents: diff changeset	2645 }
a61af66fc99e Initial load duke parents: diff changeset	2646 }
a61af66fc99e Initial load duke parents: diff changeset	2647 }
a61af66fc99e Initial load duke parents: diff changeset	2648
a61af66fc99e Initial load duke parents: diff changeset	2649 void PSParallelCompact::compact() {
a61af66fc99e Initial load duke parents: diff changeset	2650 EventMark m("5 compact");
a61af66fc99e Initial load duke parents: diff changeset	2651 // trace("5");
a61af66fc99e Initial load duke parents: diff changeset	2652 TraceTime tm("compaction phase", print_phases(), true, gclog_or_tty);
a61af66fc99e Initial load duke parents: diff changeset	2653
a61af66fc99e Initial load duke parents: diff changeset	2654 ParallelScavengeHeap* heap = (ParallelScavengeHeap*)Universe::heap();
a61af66fc99e Initial load duke parents: diff changeset	2655 assert(heap->kind() == CollectedHeap::ParallelScavengeHeap, "Sanity");
a61af66fc99e Initial load duke parents: diff changeset	2656 PSOldGen* old_gen = heap->old_gen();
a61af66fc99e Initial load duke parents: diff changeset	2657 old_gen->start_array()->reset();
a61af66fc99e Initial load duke parents: diff changeset	2658 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	2659 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	2660 TaskQueueSetSuper* qset = ParCompactionManager::region_array();
4095 bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 3979 diff changeset	2661 ParallelTaskTerminator terminator(active_gc_threads, qset);
0 a61af66fc99e Initial load duke parents: diff changeset	2662
a61af66fc99e Initial load duke parents: diff changeset	2663 GCTaskQueue* q = GCTaskQueue::create();
4095 bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 3979 diff changeset	2664 enqueue_region_draining_tasks(q, active_gc_threads);
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 3979 diff changeset	2665 enqueue_dense_prefix_tasks(q, active_gc_threads);
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 3979 diff changeset	2666 enqueue_region_stealing_tasks(q, &terminator, active_gc_threads);
0 a61af66fc99e Initial load duke parents: diff changeset	2667
a61af66fc99e Initial load duke parents: diff changeset	2668 {
a61af66fc99e Initial load duke parents: diff changeset	2669 TraceTime tm_pc("par compact", print_phases(), true, gclog_or_tty);
a61af66fc99e Initial load duke parents: diff changeset	2670
4095 bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 3979 diff changeset	2671 gc_task_manager()->execute_and_wait(q);
0 a61af66fc99e Initial load duke parents: diff changeset	2672
a61af66fc99e Initial load duke parents: diff changeset	2673 #ifdef ASSERT
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2674 // Verify that all regions have been processed before the deferred updates.
0 a61af66fc99e Initial load duke parents: diff changeset	2675 // Note that perm_space_id is skipped; this type of verification is not
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2676 // valid until the perm gen is compacted by regions.
0 a61af66fc99e Initial load duke parents: diff changeset	2677 for (unsigned int id = old_space_id; id < last_space_id; ++id) {
a61af66fc99e Initial load duke parents: diff changeset	2678 verify_complete(SpaceId(id));
a61af66fc99e Initial load duke parents: diff changeset	2679 }
a61af66fc99e Initial load duke parents: diff changeset	2680 #endif
a61af66fc99e Initial load duke parents: diff changeset	2681 }
a61af66fc99e Initial load duke parents: diff changeset	2682
a61af66fc99e Initial load duke parents: diff changeset	2683 {
a61af66fc99e Initial load duke parents: diff changeset	2684 // Update the deferred objects, if any. Any compaction manager can be used.
a61af66fc99e Initial load duke parents: diff changeset	2685 TraceTime tm_du("deferred updates", print_phases(), true, gclog_or_tty);
a61af66fc99e Initial load duke parents: diff changeset	2686 ParCompactionManager* cm = ParCompactionManager::manager_array(0);
a61af66fc99e Initial load duke parents: diff changeset	2687 for (unsigned int id = old_space_id; id < last_space_id; ++id) {
a61af66fc99e Initial load duke parents: diff changeset	2688 update_deferred_objects(cm, SpaceId(id));
a61af66fc99e Initial load duke parents: diff changeset	2689 }
a61af66fc99e Initial load duke parents: diff changeset	2690 }
a61af66fc99e Initial load duke parents: diff changeset	2691 }
a61af66fc99e Initial load duke parents: diff changeset	2692
a61af66fc99e Initial load duke parents: diff changeset	2693 #ifdef ASSERT
a61af66fc99e Initial load duke parents: diff changeset	2694 void PSParallelCompact::verify_complete(SpaceId space_id) {
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2695 // 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	2696 // and all Regions between new_top() and top() should be available (i.e.,
0 a61af66fc99e Initial load duke parents: diff changeset	2697 // should have been emptied).
a61af66fc99e Initial load duke parents: diff changeset	2698 ParallelCompactData& sd = summary_data();
a61af66fc99e Initial load duke parents: diff changeset	2699 SpaceInfo si = _space_info[space_id];
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2700 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	2701 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	2702 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	2703 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	2704 const size_t old_top_region = sd.addr_to_region_idx(old_top_addr);
0 a61af66fc99e Initial load duke parents: diff changeset	2705
a61af66fc99e Initial load duke parents: diff changeset	2706 bool issued_a_warning = false;
a61af66fc99e Initial load duke parents: diff changeset	2707
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2708 size_t cur_region;
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2709 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	2710 const RegionData* const c = sd.region(cur_region);
0 a61af66fc99e Initial load duke parents: diff changeset	2711 if (!c->completed()) {
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2712 warning("region " SIZE_FORMAT " not filled: "
0 a61af66fc99e Initial load duke parents: diff changeset	2713 "destination_count=" SIZE_FORMAT,
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2714 cur_region, c->destination_count());
0 a61af66fc99e Initial load duke parents: diff changeset	2715 issued_a_warning = true;
a61af66fc99e Initial load duke parents: diff changeset	2716 }
a61af66fc99e Initial load duke parents: diff changeset	2717 }
a61af66fc99e Initial load duke parents: diff changeset	2718
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2719 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	2720 const RegionData* const c = sd.region(cur_region);
0 a61af66fc99e Initial load duke parents: diff changeset	2721 if (!c->available()) {
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2722 warning("region " SIZE_FORMAT " not empty: "
0 a61af66fc99e Initial load duke parents: diff changeset	2723 "destination_count=" SIZE_FORMAT,
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2724 cur_region, c->destination_count());
0 a61af66fc99e Initial load duke parents: diff changeset	2725 issued_a_warning = true;
a61af66fc99e Initial load duke parents: diff changeset	2726 }
a61af66fc99e Initial load duke parents: diff changeset	2727 }
a61af66fc99e Initial load duke parents: diff changeset	2728
a61af66fc99e Initial load duke parents: diff changeset	2729 if (issued_a_warning) {
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2730 print_region_ranges();
0 a61af66fc99e Initial load duke parents: diff changeset	2731 }
a61af66fc99e Initial load duke parents: diff changeset	2732 }
a61af66fc99e Initial load duke parents: diff changeset	2733 #endif // #ifdef ASSERT
a61af66fc99e Initial load duke parents: diff changeset	2734
a61af66fc99e Initial load duke parents: diff changeset	2735 void
941 8b46c4d82093 4957990: Perm heap bloat in JVM ysr parents: 696 diff changeset	2736 PSParallelCompact::follow_weak_klass_links() {
0 a61af66fc99e Initial load duke parents: diff changeset	2737 // All klasses on the revisit stack are marked at this point.
a61af66fc99e Initial load duke parents: diff changeset	2738 // Update and follow all subklass, sibling and implementor links.
4095 bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 3979 diff changeset	2739 // Check all the stacks here even if not all the workers are active.
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 3979 diff changeset	2740 // There is no accounting which indicates which stacks might have
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 3979 diff changeset	2741 // contents to be followed.
941 8b46c4d82093 4957990: Perm heap bloat in JVM ysr parents: 696 diff changeset	2742 if (PrintRevisitStats) {
1836 894b1d7c7e01 6423256: GC stacks should use a better data structure jcoomes parents: 1833 diff changeset	2743 gclog_or_tty->print_cr("#classes in system dictionary = %d",
894b1d7c7e01 6423256: GC stacks should use a better data structure jcoomes parents: 1833 diff changeset	2744 SystemDictionary::number_of_classes());
941 8b46c4d82093 4957990: Perm heap bloat in JVM ysr parents: 696 diff changeset	2745 }
8b46c4d82093 4957990: Perm heap bloat in JVM ysr parents: 696 diff changeset	2746 for (uint i = 0; i < ParallelGCThreads + 1; i++) {
0 a61af66fc99e Initial load duke parents: diff changeset	2747 ParCompactionManager* cm = ParCompactionManager::manager_array(i);
a61af66fc99e Initial load duke parents: diff changeset	2748 KeepAliveClosure keep_alive_closure(cm);
1836 894b1d7c7e01 6423256: GC stacks should use a better data structure jcoomes parents: 1833 diff changeset	2749 Stack<Klass> const rks = cm->revisit_klass_stack();
941 8b46c4d82093 4957990: Perm heap bloat in JVM ysr parents: 696 diff changeset	2750 if (PrintRevisitStats) {
1836 894b1d7c7e01 6423256: GC stacks should use a better data structure jcoomes parents: 1833 diff changeset	2751 gclog_or_tty->print_cr("Revisit klass stack[%u] length = " SIZE_FORMAT,
894b1d7c7e01 6423256: GC stacks should use a better data structure jcoomes parents: 1833 diff changeset	2752 i, rks->size());
941 8b46c4d82093 4957990: Perm heap bloat in JVM ysr parents: 696 diff changeset	2753 }
1836 894b1d7c7e01 6423256: GC stacks should use a better data structure jcoomes parents: 1833 diff changeset	2754 while (!rks->is_empty()) {
894b1d7c7e01 6423256: GC stacks should use a better data structure jcoomes parents: 1833 diff changeset	2755 Klass* const k = rks->pop();
894b1d7c7e01 6423256: GC stacks should use a better data structure jcoomes parents: 1833 diff changeset	2756 k->follow_weak_klass_links(is_alive_closure(), &keep_alive_closure);
0 a61af66fc99e Initial load duke parents: diff changeset	2757 }
1836 894b1d7c7e01 6423256: GC stacks should use a better data structure jcoomes parents: 1833 diff changeset	2758
1311 2a1472c30599 4396719: Mark Sweep stack overflow on deeply nested Object arrays jcoomes parents: 997 diff changeset	2759 cm->follow_marking_stacks();
0 a61af66fc99e Initial load duke parents: diff changeset	2760 }
a61af66fc99e Initial load duke parents: diff changeset	2761 }
a61af66fc99e Initial load duke parents: diff changeset	2762
a61af66fc99e Initial load duke parents: diff changeset	2763 void
a61af66fc99e Initial load duke parents: diff changeset	2764 PSParallelCompact::revisit_weak_klass_link(ParCompactionManager* cm, Klass* k) {
a61af66fc99e Initial load duke parents: diff changeset	2765 cm->revisit_klass_stack()->push(k);
a61af66fc99e Initial load duke parents: diff changeset	2766 }
a61af66fc99e Initial load duke parents: diff changeset	2767
941 8b46c4d82093 4957990: Perm heap bloat in JVM ysr parents: 696 diff changeset	2768 void PSParallelCompact::revisit_mdo(ParCompactionManager* cm, DataLayout* p) {
8b46c4d82093 4957990: Perm heap bloat in JVM ysr parents: 696 diff changeset	2769 cm->revisit_mdo_stack()->push(p);
8b46c4d82093 4957990: Perm heap bloat in JVM ysr parents: 696 diff changeset	2770 }
8b46c4d82093 4957990: Perm heap bloat in JVM ysr parents: 696 diff changeset	2771
8b46c4d82093 4957990: Perm heap bloat in JVM ysr parents: 696 diff changeset	2772 void PSParallelCompact::follow_mdo_weak_refs() {
8b46c4d82093 4957990: Perm heap bloat in JVM ysr parents: 696 diff changeset	2773 // All strongly reachable oops have been marked at this point;
8b46c4d82093 4957990: Perm heap bloat in JVM ysr parents: 696 diff changeset	2774 // we can visit and clear any weak references from MDO's which
8b46c4d82093 4957990: Perm heap bloat in JVM ysr parents: 696 diff changeset	2775 // we memoized during the strong marking phase.
8b46c4d82093 4957990: Perm heap bloat in JVM ysr parents: 696 diff changeset	2776 if (PrintRevisitStats) {
1836 894b1d7c7e01 6423256: GC stacks should use a better data structure jcoomes parents: 1833 diff changeset	2777 gclog_or_tty->print_cr("#classes in system dictionary = %d",
894b1d7c7e01 6423256: GC stacks should use a better data structure jcoomes parents: 1833 diff changeset	2778 SystemDictionary::number_of_classes());
941 8b46c4d82093 4957990: Perm heap bloat in JVM ysr parents: 696 diff changeset	2779 }
8b46c4d82093 4957990: Perm heap bloat in JVM ysr parents: 696 diff changeset	2780 for (uint i = 0; i < ParallelGCThreads + 1; i++) {
8b46c4d82093 4957990: Perm heap bloat in JVM ysr parents: 696 diff changeset	2781 ParCompactionManager* cm = ParCompactionManager::manager_array(i);
1836 894b1d7c7e01 6423256: GC stacks should use a better data structure jcoomes parents: 1833 diff changeset	2782 Stack<DataLayout> rms = cm->revisit_mdo_stack();
941 8b46c4d82093 4957990: Perm heap bloat in JVM ysr parents: 696 diff changeset	2783 if (PrintRevisitStats) {
1836 894b1d7c7e01 6423256: GC stacks should use a better data structure jcoomes parents: 1833 diff changeset	2784 gclog_or_tty->print_cr("Revisit MDO stack[%u] size = " SIZE_FORMAT,
894b1d7c7e01 6423256: GC stacks should use a better data structure jcoomes parents: 1833 diff changeset	2785 i, rms->size());
941 8b46c4d82093 4957990: Perm heap bloat in JVM ysr parents: 696 diff changeset	2786 }
1836 894b1d7c7e01 6423256: GC stacks should use a better data structure jcoomes parents: 1833 diff changeset	2787 while (!rms->is_empty()) {
894b1d7c7e01 6423256: GC stacks should use a better data structure jcoomes parents: 1833 diff changeset	2788 rms->pop()->follow_weak_refs(is_alive_closure());
941 8b46c4d82093 4957990: Perm heap bloat in JVM ysr parents: 696 diff changeset	2789 }
1836 894b1d7c7e01 6423256: GC stacks should use a better data structure jcoomes parents: 1833 diff changeset	2790
1311 2a1472c30599 4396719: Mark Sweep stack overflow on deeply nested Object arrays jcoomes parents: 997 diff changeset	2791 cm->follow_marking_stacks();
941 8b46c4d82093 4957990: Perm heap bloat in JVM ysr parents: 696 diff changeset	2792 }
8b46c4d82093 4957990: Perm heap bloat in JVM ysr parents: 696 diff changeset	2793 }
8b46c4d82093 4957990: Perm heap bloat in JVM ysr parents: 696 diff changeset	2794
8b46c4d82093 4957990: Perm heap bloat in JVM ysr parents: 696 diff changeset	2795
0 a61af66fc99e Initial load duke parents: diff changeset	2796 #ifdef VALIDATE_MARK_SWEEP
a61af66fc99e Initial load duke parents: diff changeset	2797
113 ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 79 diff changeset	2798 void PSParallelCompact::track_adjusted_pointer(void* p, bool isroot) {
0 a61af66fc99e Initial load duke parents: diff changeset	2799 if (!ValidateMarkSweep)
a61af66fc99e Initial load duke parents: diff changeset	2800 return;
a61af66fc99e Initial load duke parents: diff changeset	2801
a61af66fc99e Initial load duke parents: diff changeset	2802 if (!isroot) {
a61af66fc99e Initial load duke parents: diff changeset	2803 if (_pointer_tracking) {
a61af66fc99e Initial load duke parents: diff changeset	2804 guarantee(_adjusted_pointers->contains(p), "should have seen this pointer");
a61af66fc99e Initial load duke parents: diff changeset	2805 _adjusted_pointers->remove(p);
a61af66fc99e Initial load duke parents: diff changeset	2806 }
a61af66fc99e Initial load duke parents: diff changeset	2807 } else {
a61af66fc99e Initial load duke parents: diff changeset	2808 ptrdiff_t index = _root_refs_stack->find(p);
a61af66fc99e Initial load duke parents: diff changeset	2809 if (index != -1) {
a61af66fc99e Initial load duke parents: diff changeset	2810 int l = _root_refs_stack->length();
a61af66fc99e Initial load duke parents: diff changeset	2811 if (l > 0 && l - 1 != index) {
113 ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 79 diff changeset	2812 void* last = _root_refs_stack->pop();
0 a61af66fc99e Initial load duke parents: diff changeset	2813 assert(last != p, "should be different");
a61af66fc99e Initial load duke parents: diff changeset	2814 _root_refs_stack->at_put(index, last);
a61af66fc99e Initial load duke parents: diff changeset	2815 } else {
a61af66fc99e Initial load duke parents: diff changeset	2816 _root_refs_stack->remove(p);
a61af66fc99e Initial load duke parents: diff changeset	2817 }
a61af66fc99e Initial load duke parents: diff changeset	2818 }
a61af66fc99e Initial load duke parents: diff changeset	2819 }
a61af66fc99e Initial load duke parents: diff changeset	2820 }
a61af66fc99e Initial load duke parents: diff changeset	2821
a61af66fc99e Initial load duke parents: diff changeset	2822
113 ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 79 diff changeset	2823 void PSParallelCompact::check_adjust_pointer(void* p) {
0 a61af66fc99e Initial load duke parents: diff changeset	2824 _adjusted_pointers->push(p);
a61af66fc99e Initial load duke parents: diff changeset	2825 }
a61af66fc99e Initial load duke parents: diff changeset	2826
a61af66fc99e Initial load duke parents: diff changeset	2827
a61af66fc99e Initial load duke parents: diff changeset	2828 class AdjusterTracker: public OopClosure {
a61af66fc99e Initial load duke parents: diff changeset	2829 public:
a61af66fc99e Initial load duke parents: diff changeset	2830 AdjusterTracker() {};
113 ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 79 diff changeset	2831 void do_oop(oop* o) { PSParallelCompact::check_adjust_pointer(o); }
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 79 diff changeset	2832 void do_oop(narrowOop* o) { PSParallelCompact::check_adjust_pointer(o); }
0 a61af66fc99e Initial load duke parents: diff changeset	2833 };
a61af66fc99e Initial load duke parents: diff changeset	2834
a61af66fc99e Initial load duke parents: diff changeset	2835
a61af66fc99e Initial load duke parents: diff changeset	2836 void PSParallelCompact::track_interior_pointers(oop obj) {
a61af66fc99e Initial load duke parents: diff changeset	2837 if (ValidateMarkSweep) {
a61af66fc99e Initial load duke parents: diff changeset	2838 _adjusted_pointers->clear();
a61af66fc99e Initial load duke parents: diff changeset	2839 _pointer_tracking = true;
a61af66fc99e Initial load duke parents: diff changeset	2840
a61af66fc99e Initial load duke parents: diff changeset	2841 AdjusterTracker checker;
a61af66fc99e Initial load duke parents: diff changeset	2842 obj->oop_iterate(&checker);
a61af66fc99e Initial load duke parents: diff changeset	2843 }
a61af66fc99e Initial load duke parents: diff changeset	2844 }
a61af66fc99e Initial load duke parents: diff changeset	2845
a61af66fc99e Initial load duke parents: diff changeset	2846
a61af66fc99e Initial load duke parents: diff changeset	2847 void PSParallelCompact::check_interior_pointers() {
a61af66fc99e Initial load duke parents: diff changeset	2848 if (ValidateMarkSweep) {
a61af66fc99e Initial load duke parents: diff changeset	2849 _pointer_tracking = false;
a61af66fc99e Initial load duke parents: diff changeset	2850 guarantee(_adjusted_pointers->length() == 0, "should have processed the same pointers");
a61af66fc99e Initial load duke parents: diff changeset	2851 }
a61af66fc99e Initial load duke parents: diff changeset	2852 }
a61af66fc99e Initial load duke parents: diff changeset	2853
a61af66fc99e Initial load duke parents: diff changeset	2854
a61af66fc99e Initial load duke parents: diff changeset	2855 void PSParallelCompact::reset_live_oop_tracking(bool at_perm) {
a61af66fc99e Initial load duke parents: diff changeset	2856 if (ValidateMarkSweep) {
a61af66fc99e Initial load duke parents: diff changeset	2857 guarantee((size_t)_live_oops->length() == _live_oops_index, "should be at end of live oops");
a61af66fc99e Initial load duke parents: diff changeset	2858 _live_oops_index = at_perm ? _live_oops_index_at_perm : 0;
a61af66fc99e Initial load duke parents: diff changeset	2859 }
a61af66fc99e Initial load duke parents: diff changeset	2860 }
a61af66fc99e Initial load duke parents: diff changeset	2861
a61af66fc99e Initial load duke parents: diff changeset	2862
a61af66fc99e Initial load duke parents: diff changeset	2863 void PSParallelCompact::register_live_oop(oop p, size_t size) {
a61af66fc99e Initial load duke parents: diff changeset	2864 if (ValidateMarkSweep) {
a61af66fc99e Initial load duke parents: diff changeset	2865 _live_oops->push(p);
a61af66fc99e Initial load duke parents: diff changeset	2866 _live_oops_size->push(size);
a61af66fc99e Initial load duke parents: diff changeset	2867 _live_oops_index++;
a61af66fc99e Initial load duke parents: diff changeset	2868 }
a61af66fc99e Initial load duke parents: diff changeset	2869 }
a61af66fc99e Initial load duke parents: diff changeset	2870
a61af66fc99e Initial load duke parents: diff changeset	2871 void PSParallelCompact::validate_live_oop(oop p, size_t size) {
a61af66fc99e Initial load duke parents: diff changeset	2872 if (ValidateMarkSweep) {
a61af66fc99e Initial load duke parents: diff changeset	2873 oop obj = _live_oops->at((int)_live_oops_index);
a61af66fc99e Initial load duke parents: diff changeset	2874 guarantee(obj == p, "should be the same object");
a61af66fc99e Initial load duke parents: diff changeset	2875 guarantee(_live_oops_size->at((int)_live_oops_index) == size, "should be the same size");
a61af66fc99e Initial load duke parents: diff changeset	2876 _live_oops_index++;
a61af66fc99e Initial load duke parents: diff changeset	2877 }
a61af66fc99e Initial load duke parents: diff changeset	2878 }
a61af66fc99e Initial load duke parents: diff changeset	2879
a61af66fc99e Initial load duke parents: diff changeset	2880 void PSParallelCompact::live_oop_moved_to(HeapWord* q, size_t size,
a61af66fc99e Initial load duke parents: diff changeset	2881 HeapWord* compaction_top) {
a61af66fc99e Initial load duke parents: diff changeset	2882 assert(oop(q)->forwardee() == NULL \|\| oop(q)->forwardee() == oop(compaction_top),
a61af66fc99e Initial load duke parents: diff changeset	2883 "should be moved to forwarded location");
a61af66fc99e Initial load duke parents: diff changeset	2884 if (ValidateMarkSweep) {
a61af66fc99e Initial load duke parents: diff changeset	2885 PSParallelCompact::validate_live_oop(oop(q), size);
a61af66fc99e Initial load duke parents: diff changeset	2886 _live_oops_moved_to->push(oop(compaction_top));
a61af66fc99e Initial load duke parents: diff changeset	2887 }
a61af66fc99e Initial load duke parents: diff changeset	2888 if (RecordMarkSweepCompaction) {
a61af66fc99e Initial load duke parents: diff changeset	2889 _cur_gc_live_oops->push(q);
a61af66fc99e Initial load duke parents: diff changeset	2890 _cur_gc_live_oops_moved_to->push(compaction_top);
a61af66fc99e Initial load duke parents: diff changeset	2891 _cur_gc_live_oops_size->push(size);
a61af66fc99e Initial load duke parents: diff changeset	2892 }
a61af66fc99e Initial load duke parents: diff changeset	2893 }
a61af66fc99e Initial load duke parents: diff changeset	2894
a61af66fc99e Initial load duke parents: diff changeset	2895
a61af66fc99e Initial load duke parents: diff changeset	2896 void PSParallelCompact::compaction_complete() {
a61af66fc99e Initial load duke parents: diff changeset	2897 if (RecordMarkSweepCompaction) {
a61af66fc99e Initial load duke parents: diff changeset	2898 GrowableArray<HeapWord> _tmp_live_oops = _cur_gc_live_oops;
a61af66fc99e Initial load duke parents: diff changeset	2899 GrowableArray<HeapWord> _tmp_live_oops_moved_to = _cur_gc_live_oops_moved_to;
a61af66fc99e Initial load duke parents: diff changeset	2900 GrowableArray<size_t> * _tmp_live_oops_size = _cur_gc_live_oops_size;
a61af66fc99e Initial load duke parents: diff changeset	2901
a61af66fc99e Initial load duke parents: diff changeset	2902 _cur_gc_live_oops = _last_gc_live_oops;
a61af66fc99e Initial load duke parents: diff changeset	2903 _cur_gc_live_oops_moved_to = _last_gc_live_oops_moved_to;
a61af66fc99e Initial load duke parents: diff changeset	2904 _cur_gc_live_oops_size = _last_gc_live_oops_size;
a61af66fc99e Initial load duke parents: diff changeset	2905 _last_gc_live_oops = _tmp_live_oops;
a61af66fc99e Initial load duke parents: diff changeset	2906 _last_gc_live_oops_moved_to = _tmp_live_oops_moved_to;
a61af66fc99e Initial load duke parents: diff changeset	2907 _last_gc_live_oops_size = _tmp_live_oops_size;
a61af66fc99e Initial load duke parents: diff changeset	2908 }
a61af66fc99e Initial load duke parents: diff changeset	2909 }
a61af66fc99e Initial load duke parents: diff changeset	2910
a61af66fc99e Initial load duke parents: diff changeset	2911
a61af66fc99e Initial load duke parents: diff changeset	2912 void PSParallelCompact::print_new_location_of_heap_address(HeapWord* q) {
a61af66fc99e Initial load duke parents: diff changeset	2913 if (!RecordMarkSweepCompaction) {
a61af66fc99e Initial load duke parents: diff changeset	2914 tty->print_cr("Requires RecordMarkSweepCompaction to be enabled");
a61af66fc99e Initial load duke parents: diff changeset	2915 return;
a61af66fc99e Initial load duke parents: diff changeset	2916 }
a61af66fc99e Initial load duke parents: diff changeset	2917
a61af66fc99e Initial load duke parents: diff changeset	2918 if (_last_gc_live_oops == NULL) {
a61af66fc99e Initial load duke parents: diff changeset	2919 tty->print_cr("No compaction information gathered yet");
a61af66fc99e Initial load duke parents: diff changeset	2920 return;
a61af66fc99e Initial load duke parents: diff changeset	2921 }
a61af66fc99e Initial load duke parents: diff changeset	2922
a61af66fc99e Initial load duke parents: diff changeset	2923 for (int i = 0; i < _last_gc_live_oops->length(); i++) {
a61af66fc99e Initial load duke parents: diff changeset	2924 HeapWord* old_oop = _last_gc_live_oops->at(i);
a61af66fc99e Initial load duke parents: diff changeset	2925 size_t sz = _last_gc_live_oops_size->at(i);
a61af66fc99e Initial load duke parents: diff changeset	2926 if (old_oop <= q && q < (old_oop + sz)) {
a61af66fc99e Initial load duke parents: diff changeset	2927 HeapWord* new_oop = _last_gc_live_oops_moved_to->at(i);
a61af66fc99e Initial load duke parents: diff changeset	2928 size_t offset = (q - old_oop);
a61af66fc99e Initial load duke parents: diff changeset	2929 tty->print_cr("Address " PTR_FORMAT, q);
a61af66fc99e Initial load duke parents: diff changeset	2930 tty->print_cr(" Was in oop " PTR_FORMAT ", size %d, at offset %d", old_oop, sz, offset);
a61af66fc99e Initial load duke parents: diff changeset	2931 tty->print_cr(" Now in oop " PTR_FORMAT ", actual address " PTR_FORMAT, new_oop, new_oop + offset);
a61af66fc99e Initial load duke parents: diff changeset	2932 return;
a61af66fc99e Initial load duke parents: diff changeset	2933 }
a61af66fc99e Initial load duke parents: diff changeset	2934 }
a61af66fc99e Initial load duke parents: diff changeset	2935
a61af66fc99e Initial load duke parents: diff changeset	2936 tty->print_cr("Address " PTR_FORMAT " not found in live oop information from last GC", q);
a61af66fc99e Initial load duke parents: diff changeset	2937 }
a61af66fc99e Initial load duke parents: diff changeset	2938 #endif //VALIDATE_MARK_SWEEP
a61af66fc99e Initial load duke parents: diff changeset	2939
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2940 // Update interior oops in the ranges of regions [beg_region, end_region).
0 a61af66fc99e Initial load duke parents: diff changeset	2941 void
a61af66fc99e Initial load duke parents: diff changeset	2942 PSParallelCompact::update_and_deadwood_in_dense_prefix(ParCompactionManager* cm,
a61af66fc99e Initial load duke parents: diff changeset	2943 SpaceId space_id,
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2944 size_t beg_region,
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2945 size_t end_region) {
0 a61af66fc99e Initial load duke parents: diff changeset	2946 ParallelCompactData& sd = summary_data();
a61af66fc99e Initial load duke parents: diff changeset	2947 ParMarkBitMap* const mbm = mark_bitmap();
a61af66fc99e Initial load duke parents: diff changeset	2948
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2949 HeapWord* beg_addr = sd.region_to_addr(beg_region);
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2950 HeapWord* const end_addr = sd.region_to_addr(end_region);
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2951 assert(beg_region <= end_region, "bad region range");
0 a61af66fc99e Initial load duke parents: diff changeset	2952 assert(end_addr <= dense_prefix(space_id), "not in the dense prefix");
a61af66fc99e Initial load duke parents: diff changeset	2953
a61af66fc99e Initial load duke parents: diff changeset	2954 #ifdef ASSERT
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2955 // Claim the regions to avoid triggering an assert when they are marked as
0 a61af66fc99e Initial load duke parents: diff changeset	2956 // filled.
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2957 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	2958 assert(sd.region(claim_region)->claim_unsafe(), "claim() failed");
0 a61af66fc99e Initial load duke parents: diff changeset	2959 }
a61af66fc99e Initial load duke parents: diff changeset	2960 #endif // #ifdef ASSERT
a61af66fc99e Initial load duke parents: diff changeset	2961
a61af66fc99e Initial load duke parents: diff changeset	2962 if (beg_addr != space(space_id)->bottom()) {
a61af66fc99e Initial load duke parents: diff changeset	2963 // 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	2964 // 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	2965 // 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	2966 // 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	2967 // 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	2968 // 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	2969 // space.
0 a61af66fc99e Initial load duke parents: diff changeset	2970 assert(beg_addr > space(space_id)->bottom(), "sanity");
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2971 const RegionData* const cp = sd.region(beg_region);
0 a61af66fc99e Initial load duke parents: diff changeset	2972 if (cp->partial_obj_size() != 0) {
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2973 beg_addr = sd.partial_obj_end(beg_region);
0 a61af66fc99e Initial load duke parents: diff changeset	2974 } else if (dead_space_crosses_boundary(cp, mbm->addr_to_bit(beg_addr))) {
a61af66fc99e Initial load duke parents: diff changeset	2975 beg_addr = mbm->find_obj_beg(beg_addr, end_addr);
a61af66fc99e Initial load duke parents: diff changeset	2976 }
a61af66fc99e Initial load duke parents: diff changeset	2977 }
a61af66fc99e Initial load duke parents: diff changeset	2978
a61af66fc99e Initial load duke parents: diff changeset	2979 if (beg_addr < end_addr) {
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2980 // A live object or block of dead space starts in this range of Regions.
0 a61af66fc99e Initial load duke parents: diff changeset	2981 HeapWord* const dense_prefix_end = dense_prefix(space_id);
a61af66fc99e Initial load duke parents: diff changeset	2982
a61af66fc99e Initial load duke parents: diff changeset	2983 // Create closures and iterate.
a61af66fc99e Initial load duke parents: diff changeset	2984 UpdateOnlyClosure update_closure(mbm, cm, space_id);
a61af66fc99e Initial load duke parents: diff changeset	2985 FillClosure fill_closure(cm, space_id);
a61af66fc99e Initial load duke parents: diff changeset	2986 ParMarkBitMap::IterationStatus status;
a61af66fc99e Initial load duke parents: diff changeset	2987 status = mbm->iterate(&update_closure, &fill_closure, beg_addr, end_addr,
a61af66fc99e Initial load duke parents: diff changeset	2988 dense_prefix_end);
a61af66fc99e Initial load duke parents: diff changeset	2989 if (status == ParMarkBitMap::incomplete) {
a61af66fc99e Initial load duke parents: diff changeset	2990 update_closure.do_addr(update_closure.source());
a61af66fc99e Initial load duke parents: diff changeset	2991 }
a61af66fc99e Initial load duke parents: diff changeset	2992 }
a61af66fc99e Initial load duke parents: diff changeset	2993
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2994 // Mark the regions as filled.
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2995 RegionData* const beg_cp = sd.region(beg_region);
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2996 RegionData* const end_cp = sd.region(end_region);
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2997 for (RegionData* cp = beg_cp; cp < end_cp; ++cp) {
0 a61af66fc99e Initial load duke parents: diff changeset	2998 cp->set_completed();
a61af66fc99e Initial load duke parents: diff changeset	2999 }
a61af66fc99e Initial load duke parents: diff changeset	3000 }
a61af66fc99e Initial load duke parents: diff changeset	3001
a61af66fc99e Initial load duke parents: diff changeset	3002 // Return the SpaceId for the space containing addr. If addr is not in the
a61af66fc99e Initial load duke parents: diff changeset	3003 // heap, last_space_id is returned. In debug mode it expects the address to be
a61af66fc99e Initial load duke parents: diff changeset	3004 // in the heap and asserts such.
a61af66fc99e Initial load duke parents: diff changeset	3005 PSParallelCompact::SpaceId PSParallelCompact::space_id(HeapWord* addr) {
a61af66fc99e Initial load duke parents: diff changeset	3006 assert(Universe::heap()->is_in_reserved(addr), "addr not in the heap");
a61af66fc99e Initial load duke parents: diff changeset	3007
a61af66fc99e Initial load duke parents: diff changeset	3008 for (unsigned int id = perm_space_id; id < last_space_id; ++id) {
a61af66fc99e Initial load duke parents: diff changeset	3009 if (_space_info[id].space()->contains(addr)) {
a61af66fc99e Initial load duke parents: diff changeset	3010 return SpaceId(id);
a61af66fc99e Initial load duke parents: diff changeset	3011 }
a61af66fc99e Initial load duke parents: diff changeset	3012 }
a61af66fc99e Initial load duke parents: diff changeset	3013
a61af66fc99e Initial load duke parents: diff changeset	3014 assert(false, "no space contains the addr");
a61af66fc99e Initial load duke parents: diff changeset	3015 return last_space_id;
a61af66fc99e Initial load duke parents: diff changeset	3016 }
a61af66fc99e Initial load duke parents: diff changeset	3017
a61af66fc99e Initial load duke parents: diff changeset	3018 void PSParallelCompact::update_deferred_objects(ParCompactionManager* cm,
a61af66fc99e Initial load duke parents: diff changeset	3019 SpaceId id) {
a61af66fc99e Initial load duke parents: diff changeset	3020 assert(id < last_space_id, "bad space id");
a61af66fc99e Initial load duke parents: diff changeset	3021
a61af66fc99e Initial load duke parents: diff changeset	3022 ParallelCompactData& sd = summary_data();
a61af66fc99e Initial load duke parents: diff changeset	3023 const SpaceInfo* const space_info = _space_info + id;
a61af66fc99e Initial load duke parents: diff changeset	3024 ObjectStartArray* const start_array = space_info->start_array();
a61af66fc99e Initial load duke parents: diff changeset	3025
a61af66fc99e Initial load duke parents: diff changeset	3026 const MutableSpace* const space = space_info->space();
a61af66fc99e Initial load duke parents: diff changeset	3027 assert(space_info->dense_prefix() >= space->bottom(), "dense_prefix not set");
a61af66fc99e Initial load duke parents: diff changeset	3028 HeapWord* const beg_addr = space_info->dense_prefix();
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3029 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	3030
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3031 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	3032 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	3033 const RegionData* cur_region;
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3034 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	3035 HeapWord* const addr = cur_region->deferred_obj_addr();
0 a61af66fc99e Initial load duke parents: diff changeset	3036 if (addr != NULL) {
a61af66fc99e Initial load duke parents: diff changeset	3037 if (start_array != NULL) {
a61af66fc99e Initial load duke parents: diff changeset	3038 start_array->allocate_block(addr);
a61af66fc99e Initial load duke parents: diff changeset	3039 }
a61af66fc99e Initial load duke parents: diff changeset	3040 oop(addr)->update_contents(cm);
a61af66fc99e Initial load duke parents: diff changeset	3041 assert(oop(addr)->is_oop_or_null(), "should be an oop now");
a61af66fc99e Initial load duke parents: diff changeset	3042 }
a61af66fc99e Initial load duke parents: diff changeset	3043 }
a61af66fc99e Initial load duke parents: diff changeset	3044 }
a61af66fc99e Initial load duke parents: diff changeset	3045
a61af66fc99e Initial load duke parents: diff changeset	3046 // Skip over count live words starting from beg, and return the address of the
a61af66fc99e Initial load duke parents: diff changeset	3047 // next live word. Unless marked, the word corresponding to beg is assumed to
a61af66fc99e Initial load duke parents: diff changeset	3048 // be dead. Callers must either ensure beg does not correspond to the middle of
a61af66fc99e Initial load duke parents: diff changeset	3049 // an object, or account for those live words in some other way. Callers must
a61af66fc99e Initial load duke parents: diff changeset	3050 // also ensure that there are enough live words in the range [beg, end) to skip.
a61af66fc99e Initial load duke parents: diff changeset	3051 HeapWord*
a61af66fc99e Initial load duke parents: diff changeset	3052 PSParallelCompact::skip_live_words(HeapWord* beg, HeapWord* end, size_t count)
a61af66fc99e Initial load duke parents: diff changeset	3053 {
a61af66fc99e Initial load duke parents: diff changeset	3054 assert(count > 0, "sanity");
a61af66fc99e Initial load duke parents: diff changeset	3055
a61af66fc99e Initial load duke parents: diff changeset	3056 ParMarkBitMap* m = mark_bitmap();
a61af66fc99e Initial load duke parents: diff changeset	3057 idx_t bits_to_skip = m->words_to_bits(count);
a61af66fc99e Initial load duke parents: diff changeset	3058 idx_t cur_beg = m->addr_to_bit(beg);
a61af66fc99e Initial load duke parents: diff changeset	3059 const idx_t search_end = BitMap::word_align_up(m->addr_to_bit(end));
a61af66fc99e Initial load duke parents: diff changeset	3060
a61af66fc99e Initial load duke parents: diff changeset	3061 do {
a61af66fc99e Initial load duke parents: diff changeset	3062 cur_beg = m->find_obj_beg(cur_beg, search_end);
a61af66fc99e Initial load duke parents: diff changeset	3063 idx_t cur_end = m->find_obj_end(cur_beg, search_end);
a61af66fc99e Initial load duke parents: diff changeset	3064 const size_t obj_bits = cur_end - cur_beg + 1;
a61af66fc99e Initial load duke parents: diff changeset	3065 if (obj_bits > bits_to_skip) {
a61af66fc99e Initial load duke parents: diff changeset	3066 return m->bit_to_addr(cur_beg + bits_to_skip);
a61af66fc99e Initial load duke parents: diff changeset	3067 }
a61af66fc99e Initial load duke parents: diff changeset	3068 bits_to_skip -= obj_bits;
a61af66fc99e Initial load duke parents: diff changeset	3069 cur_beg = cur_end + 1;
a61af66fc99e Initial load duke parents: diff changeset	3070 } while (bits_to_skip > 0);
a61af66fc99e Initial load duke parents: diff changeset	3071
a61af66fc99e Initial load duke parents: diff changeset	3072 // Skipping the desired number of words landed just past the end of an object.
a61af66fc99e Initial load duke parents: diff changeset	3073 // Find the start of the next object.
a61af66fc99e Initial load duke parents: diff changeset	3074 cur_beg = m->find_obj_beg(cur_beg, search_end);
a61af66fc99e Initial load duke parents: diff changeset	3075 assert(cur_beg < m->addr_to_bit(end), "not enough live words to skip");
a61af66fc99e Initial load duke parents: diff changeset	3076 return m->bit_to_addr(cur_beg);
a61af66fc99e Initial load duke parents: diff changeset	3077 }
a61af66fc99e Initial load duke parents: diff changeset	3078
482 7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	3079 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	3080 SpaceId src_space_id,
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	3081 size_t src_region_idx)
0 a61af66fc99e Initial load duke parents: diff changeset	3082 {
482 7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	3083 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	3084
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	3085 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	3086 if (split_info.dest_region_addr() == dest_addr) {
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	3087 // 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	3088 // be copied to dest_addr.
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	3089 return split_info.first_src_addr();
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	3090 }
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	3091
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	3092 const ParallelCompactData& sd = summary_data();
0 a61af66fc99e Initial load duke parents: diff changeset	3093 ParMarkBitMap* const bitmap = mark_bitmap();
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3094 const size_t RegionSize = ParallelCompactData::RegionSize;
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3095
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3096 assert(sd.is_region_aligned(dest_addr), "not aligned");
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3097 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	3098 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	3099 HeapWord* const src_region_destination = src_region_ptr->destination();
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3100
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3101 assert(dest_addr >= src_region_destination, "wrong src region");
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3102 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	3103
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3104 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	3105 HeapWord* const src_region_end = src_region_beg + RegionSize;
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3106
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3107 HeapWord* addr = src_region_beg;
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3108 if (dest_addr == src_region_destination) {
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3109 // Return the first live word in the source region.
0 a61af66fc99e Initial load duke parents: diff changeset	3110 if (partial_obj_size == 0) {
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3111 addr = bitmap->find_obj_beg(addr, src_region_end);
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3112 assert(addr < src_region_end, "no objects start in src region");
0 a61af66fc99e Initial load duke parents: diff changeset	3113 }
a61af66fc99e Initial load duke parents: diff changeset	3114 return addr;
a61af66fc99e Initial load duke parents: diff changeset	3115 }
a61af66fc99e Initial load duke parents: diff changeset	3116
a61af66fc99e Initial load duke parents: diff changeset	3117 // Must skip some live data.
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3118 size_t words_to_skip = dest_addr - src_region_destination;
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3119 assert(src_region_ptr->data_size() > words_to_skip, "wrong src region");
0 a61af66fc99e Initial load duke parents: diff changeset	3120
a61af66fc99e Initial load duke parents: diff changeset	3121 if (partial_obj_size >= words_to_skip) {
a61af66fc99e Initial load duke parents: diff changeset	3122 // All the live words to skip are part of the partial object.
a61af66fc99e Initial load duke parents: diff changeset	3123 addr += words_to_skip;
a61af66fc99e Initial load duke parents: diff changeset	3124 if (partial_obj_size == words_to_skip) {
a61af66fc99e Initial load duke parents: diff changeset	3125 // Find the first live word past the partial object.
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3126 addr = bitmap->find_obj_beg(addr, src_region_end);
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3127 assert(addr < src_region_end, "wrong src region");
0 a61af66fc99e Initial load duke parents: diff changeset	3128 }
a61af66fc99e Initial load duke parents: diff changeset	3129 return addr;
a61af66fc99e Initial load duke parents: diff changeset	3130 }
a61af66fc99e Initial load duke parents: diff changeset	3131
a61af66fc99e Initial load duke parents: diff changeset	3132 // Skip over the partial object (if any).
a61af66fc99e Initial load duke parents: diff changeset	3133 if (partial_obj_size != 0) {
a61af66fc99e Initial load duke parents: diff changeset	3134 words_to_skip -= partial_obj_size;
a61af66fc99e Initial load duke parents: diff changeset	3135 addr += partial_obj_size;
a61af66fc99e Initial load duke parents: diff changeset	3136 }
a61af66fc99e Initial load duke parents: diff changeset	3137
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3138 // 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	3139 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	3140 assert(addr < src_region_end, "wrong src region");
0 a61af66fc99e Initial load duke parents: diff changeset	3141 return addr;
a61af66fc99e Initial load duke parents: diff changeset	3142 }
a61af66fc99e Initial load duke parents: diff changeset	3143
a61af66fc99e Initial load duke parents: diff changeset	3144 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	3145 SpaceId src_space_id,
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3146 size_t beg_region,
0 a61af66fc99e Initial load duke parents: diff changeset	3147 HeapWord* end_addr)
a61af66fc99e Initial load duke parents: diff changeset	3148 {
a61af66fc99e Initial load duke parents: diff changeset	3149 ParallelCompactData& sd = summary_data();
495 234c22e54b98 6784849: par compact - can fail when to_space is non-empty jcoomes parents: 483 diff changeset	3150
234c22e54b98 6784849: par compact - can fail when to_space is non-empty jcoomes parents: 483 diff changeset	3151 #ifdef ASSERT
234c22e54b98 6784849: par compact - can fail when to_space is non-empty jcoomes parents: 483 diff changeset	3152 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	3153 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	3154 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	3155 "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	3156 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	3157 "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	3158 #endif // #ifdef ASSERT
234c22e54b98 6784849: par compact - can fail when to_space is non-empty jcoomes parents: 483 diff changeset	3159
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3160 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	3161 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	3162
234c22e54b98 6784849: par compact - can fail when to_space is non-empty jcoomes parents: 483 diff changeset	3163 // 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	3164 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	3165 RegionData* const enqueue_end =
234c22e54b98 6784849: par compact - can fail when to_space is non-empty jcoomes parents: 483 diff changeset	3166 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	3167
234c22e54b98 6784849: par compact - can fail when to_space is non-empty jcoomes parents: 483 diff changeset	3168 for (RegionData* cur = beg; cur < end; ++cur) {
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3169 assert(cur->data_size() > 0, "region must have live data");
0 a61af66fc99e Initial load duke parents: diff changeset	3170 cur->decrement_destination_count();
495 234c22e54b98 6784849: par compact - can fail when to_space is non-empty jcoomes parents: 483 diff changeset	3171 if (cur < enqueue_end && cur->available() && cur->claim()) {
1638 b2a00dd3117c 6957084: simplify TaskQueue overflow handling jcoomes parents: 1579 diff changeset	3172 cm->push_region(sd.region(cur));
0 a61af66fc99e Initial load duke parents: diff changeset	3173 }
a61af66fc99e Initial load duke parents: diff changeset	3174 }
a61af66fc99e Initial load duke parents: diff changeset	3175 }
a61af66fc99e Initial load duke parents: diff changeset	3176
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3177 size_t PSParallelCompact::next_src_region(MoveAndUpdateClosure& closure,
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3178 SpaceId& src_space_id,
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3179 HeapWord*& src_space_top,
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3180 HeapWord* end_addr)
0 a61af66fc99e Initial load duke parents: diff changeset	3181 {
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3182 typedef ParallelCompactData::RegionData RegionData;
0 a61af66fc99e Initial load duke parents: diff changeset	3183
a61af66fc99e Initial load duke parents: diff changeset	3184 ParallelCompactData& sd = PSParallelCompact::summary_data();
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3185 const size_t region_size = ParallelCompactData::RegionSize;
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3186
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3187 size_t src_region_idx = 0;
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 // 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	3190 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	3191 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	3192 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	3193 const RegionData* const top_region_ptr =
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3194 sd.addr_to_region_ptr(top_aligned_up);
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3195 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	3196 ++src_region_ptr;
0 a61af66fc99e Initial load duke parents: diff changeset	3197 }
a61af66fc99e Initial load duke parents: diff changeset	3198
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3199 if (src_region_ptr < top_region_ptr) {
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3200 // 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	3201 // and the source address to match src_region_ptr.
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3202 src_region_idx = sd.region(src_region_ptr);
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3203 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	3204 if (src_region_addr > closure.source()) {
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3205 closure.set_source(src_region_addr);
0 a61af66fc99e Initial load duke parents: diff changeset	3206 }
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3207 return src_region_idx;
0 a61af66fc99e Initial load duke parents: diff changeset	3208 }
a61af66fc99e Initial load duke parents: diff changeset	3209
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3210 // Switch to a new source space and find the first non-empty region.
0 a61af66fc99e Initial load duke parents: diff changeset	3211 unsigned int space_id = src_space_id + 1;
a61af66fc99e Initial load duke parents: diff changeset	3212 assert(space_id < last_space_id, "not enough spaces");
a61af66fc99e Initial load duke parents: diff changeset	3213
a61af66fc99e Initial load duke parents: diff changeset	3214 HeapWord* const destination = closure.destination();
a61af66fc99e Initial load duke parents: diff changeset	3215
a61af66fc99e Initial load duke parents: diff changeset	3216 do {
a61af66fc99e Initial load duke parents: diff changeset	3217 MutableSpace* space = _space_info[space_id].space();
a61af66fc99e Initial load duke parents: diff changeset	3218 HeapWord* const bottom = space->bottom();
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3219 const RegionData* const bottom_cp = sd.addr_to_region_ptr(bottom);
0 a61af66fc99e Initial load duke parents: diff changeset	3220
a61af66fc99e Initial load duke parents: diff changeset	3221 // Iterate over the spaces that do not compact into themselves.
a61af66fc99e Initial load duke parents: diff changeset	3222 if (bottom_cp->destination() != bottom) {
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3223 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	3224 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	3225
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3226 for (const RegionData* src_cp = bottom_cp; src_cp < top_cp; ++src_cp) {
0 a61af66fc99e Initial load duke parents: diff changeset	3227 if (src_cp->live_obj_size() > 0) {
a61af66fc99e Initial load duke parents: diff changeset	3228 // Found it.
a61af66fc99e Initial load duke parents: diff changeset	3229 assert(src_cp->destination() == destination,
a61af66fc99e Initial load duke parents: diff changeset	3230 "first live obj in the space must match the destination");
a61af66fc99e Initial load duke parents: diff changeset	3231 assert(src_cp->partial_obj_size() == 0,
a61af66fc99e Initial load duke parents: diff changeset	3232 "a space cannot begin with a partial obj");
a61af66fc99e Initial load duke parents: diff changeset	3233
a61af66fc99e Initial load duke parents: diff changeset	3234 src_space_id = SpaceId(space_id);
a61af66fc99e Initial load duke parents: diff changeset	3235 src_space_top = space->top();
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3236 const size_t src_region_idx = sd.region(src_cp);
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3237 closure.set_source(sd.region_to_addr(src_region_idx));
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3238 return src_region_idx;
0 a61af66fc99e Initial load duke parents: diff changeset	3239 } else {
a61af66fc99e Initial load duke parents: diff changeset	3240 assert(src_cp->data_size() == 0, "sanity");
a61af66fc99e Initial load duke parents: diff changeset	3241 }
a61af66fc99e Initial load duke parents: diff changeset	3242 }
a61af66fc99e Initial load duke parents: diff changeset	3243 }
a61af66fc99e Initial load duke parents: diff changeset	3244 } while (++space_id < last_space_id);
a61af66fc99e Initial load duke parents: diff changeset	3245
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3246 assert(false, "no source region was found");
0 a61af66fc99e Initial load duke parents: diff changeset	3247 return 0;
a61af66fc99e Initial load duke parents: diff changeset	3248 }
a61af66fc99e Initial load duke parents: diff changeset	3249
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3250 void PSParallelCompact::fill_region(ParCompactionManager* cm, size_t region_idx)
0 a61af66fc99e Initial load duke parents: diff changeset	3251 {
a61af66fc99e Initial load duke parents: diff changeset	3252 typedef ParMarkBitMap::IterationStatus IterationStatus;
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3253 const size_t RegionSize = ParallelCompactData::RegionSize;
0 a61af66fc99e Initial load duke parents: diff changeset	3254 ParMarkBitMap* const bitmap = mark_bitmap();
a61af66fc99e Initial load duke parents: diff changeset	3255 ParallelCompactData& sd = summary_data();
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3256 RegionData* const region_ptr = sd.region(region_idx);
0 a61af66fc99e Initial load duke parents: diff changeset	3257
a61af66fc99e Initial load duke parents: diff changeset	3258 // Get the items needed to construct the closure.
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3259 HeapWord* dest_addr = sd.region_to_addr(region_idx);
0 a61af66fc99e Initial load duke parents: diff changeset	3260 SpaceId dest_space_id = space_id(dest_addr);
a61af66fc99e Initial load duke parents: diff changeset	3261 ObjectStartArray* start_array = _space_info[dest_space_id].start_array();
a61af66fc99e Initial load duke parents: diff changeset	3262 HeapWord* new_top = _space_info[dest_space_id].new_top();
a61af66fc99e Initial load duke parents: diff changeset	3263 assert(dest_addr < new_top, "sanity");
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3264 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	3265
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3266 // Get the source region and related info.
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3267 size_t src_region_idx = region_ptr->source_region();
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3268 SpaceId src_space_id = space_id(sd.region_to_addr(src_region_idx));
0 a61af66fc99e Initial load duke parents: diff changeset	3269 HeapWord* src_space_top = _space_info[src_space_id].space()->top();
a61af66fc99e Initial load duke parents: diff changeset	3270
a61af66fc99e Initial load duke parents: diff changeset	3271 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	3272 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	3273
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3274 // 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	3275 // 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	3276 if (src_region_idx == region_idx) {
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3277 src_region_idx += 1;
0 a61af66fc99e Initial load duke parents: diff changeset	3278 }
a61af66fc99e Initial load duke parents: diff changeset	3279
a61af66fc99e Initial load duke parents: diff changeset	3280 if (bitmap->is_unmarked(closure.source())) {
a61af66fc99e Initial load duke parents: diff changeset	3281 // The first source word is in the middle of an object; copy the remainder
a61af66fc99e Initial load duke parents: diff changeset	3282 // of the object or as much as will fit. The fact that pointer updates were
a61af66fc99e Initial load duke parents: diff changeset	3283 // deferred will be noted when the object header is processed.
a61af66fc99e Initial load duke parents: diff changeset	3284 HeapWord* const old_src_addr = closure.source();
a61af66fc99e Initial load duke parents: diff changeset	3285 closure.copy_partial_obj();
a61af66fc99e Initial load duke parents: diff changeset	3286 if (closure.is_full()) {
495 234c22e54b98 6784849: par compact - can fail when to_space is non-empty jcoomes parents: 483 diff changeset	3287 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	3288 closure.source());
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3289 region_ptr->set_deferred_obj_addr(NULL);
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3290 region_ptr->set_completed();
0 a61af66fc99e Initial load duke parents: diff changeset	3291 return;
a61af66fc99e Initial load duke parents: diff changeset	3292 }
a61af66fc99e Initial load duke parents: diff changeset	3293
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3294 HeapWord* const end_addr = sd.region_align_down(closure.source());
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3295 if (sd.region_align_down(old_src_addr) != end_addr) {
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3296 // 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	3297 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	3298
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3299 // Move to the next source region, possibly switching spaces as well. All
0 a61af66fc99e Initial load duke parents: diff changeset	3300 // args except end_addr may be modified.
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3301 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	3302 end_addr);
0 a61af66fc99e Initial load duke parents: diff changeset	3303 }
a61af66fc99e Initial load duke parents: diff changeset	3304 }
a61af66fc99e Initial load duke parents: diff changeset	3305
a61af66fc99e Initial load duke parents: diff changeset	3306 do {
a61af66fc99e Initial load duke parents: diff changeset	3307 HeapWord* const cur_addr = closure.source();
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3308 HeapWord* const end_addr = MIN2(sd.region_align_up(cur_addr + 1),
0 a61af66fc99e Initial load duke parents: diff changeset	3309 src_space_top);
a61af66fc99e Initial load duke parents: diff changeset	3310 IterationStatus status = bitmap->iterate(&closure, cur_addr, end_addr);
a61af66fc99e Initial load duke parents: diff changeset	3311
a61af66fc99e Initial load duke parents: diff changeset	3312 if (status == ParMarkBitMap::incomplete) {
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3313 // 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	3314 // region.
1489 cff162798819 6888953: some calls to function-like macros are missing semicolons jcoomes parents: 1387 diff changeset	3315 assert(closure.source() < end_addr, "sanity");
0 a61af66fc99e Initial load duke parents: diff changeset	3316 HeapWord* const obj_beg = closure.source();
a61af66fc99e Initial load duke parents: diff changeset	3317 HeapWord* const range_end = MIN2(obj_beg + closure.words_remaining(),
a61af66fc99e Initial load duke parents: diff changeset	3318 src_space_top);
a61af66fc99e Initial load duke parents: diff changeset	3319 HeapWord* const obj_end = bitmap->find_obj_end(obj_beg, range_end);
a61af66fc99e Initial load duke parents: diff changeset	3320 if (obj_end < range_end) {
a61af66fc99e Initial load duke parents: diff changeset	3321 // The end was found; the entire object will fit.
a61af66fc99e Initial load duke parents: diff changeset	3322 status = closure.do_addr(obj_beg, bitmap->obj_size(obj_beg, obj_end));
a61af66fc99e Initial load duke parents: diff changeset	3323 assert(status != ParMarkBitMap::would_overflow, "sanity");
a61af66fc99e Initial load duke parents: diff changeset	3324 } else {
a61af66fc99e Initial load duke parents: diff changeset	3325 // The end was not found; the object will not fit.
a61af66fc99e Initial load duke parents: diff changeset	3326 assert(range_end < src_space_top, "obj cannot cross space boundary");
a61af66fc99e Initial load duke parents: diff changeset	3327 status = ParMarkBitMap::would_overflow;
a61af66fc99e Initial load duke parents: diff changeset	3328 }
a61af66fc99e Initial load duke parents: diff changeset	3329 }
a61af66fc99e Initial load duke parents: diff changeset	3330
a61af66fc99e Initial load duke parents: diff changeset	3331 if (status == ParMarkBitMap::would_overflow) {
a61af66fc99e Initial load duke parents: diff changeset	3332 // 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	3333 // 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	3334 region_ptr->set_deferred_obj_addr(closure.destination());
0 a61af66fc99e Initial load duke parents: diff changeset	3335 status = closure.copy_until_full(); // copies from closure.source()
a61af66fc99e Initial load duke parents: diff changeset	3336
495 234c22e54b98 6784849: par compact - can fail when to_space is non-empty jcoomes parents: 483 diff changeset	3337 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	3338 closure.source());
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3339 region_ptr->set_completed();
0 a61af66fc99e Initial load duke parents: diff changeset	3340 return;
a61af66fc99e Initial load duke parents: diff changeset	3341 }
a61af66fc99e Initial load duke parents: diff changeset	3342
a61af66fc99e Initial load duke parents: diff changeset	3343 if (status == ParMarkBitMap::full) {
495 234c22e54b98 6784849: par compact - can fail when to_space is non-empty jcoomes parents: 483 diff changeset	3344 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	3345 closure.source());
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3346 region_ptr->set_deferred_obj_addr(NULL);
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3347 region_ptr->set_completed();
0 a61af66fc99e Initial load duke parents: diff changeset	3348 return;
a61af66fc99e Initial load duke parents: diff changeset	3349 }
a61af66fc99e Initial load duke parents: diff changeset	3350
495 234c22e54b98 6784849: par compact - can fail when to_space is non-empty jcoomes parents: 483 diff changeset	3351 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	3352
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3353 // Move to the next source region, possibly switching spaces as well. All
0 a61af66fc99e Initial load duke parents: diff changeset	3354 // args except end_addr may be modified.
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3355 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	3356 end_addr);
0 a61af66fc99e Initial load duke parents: diff changeset	3357 } while (true);
a61af66fc99e Initial load duke parents: diff changeset	3358 }
a61af66fc99e Initial load duke parents: diff changeset	3359
a61af66fc99e Initial load duke parents: diff changeset	3360 void
a61af66fc99e Initial load duke parents: diff changeset	3361 PSParallelCompact::move_and_update(ParCompactionManager* cm, SpaceId space_id) {
a61af66fc99e Initial load duke parents: diff changeset	3362 const MutableSpace* sp = space(space_id);
a61af66fc99e Initial load duke parents: diff changeset	3363 if (sp->is_empty()) {
a61af66fc99e Initial load duke parents: diff changeset	3364 return;
a61af66fc99e Initial load duke parents: diff changeset	3365 }
a61af66fc99e Initial load duke parents: diff changeset	3366
a61af66fc99e Initial load duke parents: diff changeset	3367 ParallelCompactData& sd = PSParallelCompact::summary_data();
a61af66fc99e Initial load duke parents: diff changeset	3368 ParMarkBitMap* const bitmap = mark_bitmap();
a61af66fc99e Initial load duke parents: diff changeset	3369 HeapWord* const dp_addr = dense_prefix(space_id);
a61af66fc99e Initial load duke parents: diff changeset	3370 HeapWord* beg_addr = sp->bottom();
a61af66fc99e Initial load duke parents: diff changeset	3371 HeapWord* end_addr = sp->top();
a61af66fc99e Initial load duke parents: diff changeset	3372
a61af66fc99e Initial load duke parents: diff changeset	3373 assert(beg_addr <= dp_addr && dp_addr <= end_addr, "bad dense prefix");
a61af66fc99e Initial load duke parents: diff changeset	3374
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3375 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	3376 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	3377 if (beg_region < dp_region) {
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3378 update_and_deadwood_in_dense_prefix(cm, space_id, beg_region, dp_region);
0 a61af66fc99e Initial load duke parents: diff changeset	3379 }
a61af66fc99e Initial load duke parents: diff changeset	3380
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3381 // 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	3382 // 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	3383 HeapWord* const dest_addr = sd.partial_obj_end(dp_region);
0 a61af66fc99e Initial load duke parents: diff changeset	3384 HeapWord* const new_top = _space_info[space_id].new_top();
a61af66fc99e Initial load duke parents: diff changeset	3385 assert(new_top >= dest_addr, "bad new_top value");
a61af66fc99e Initial load duke parents: diff changeset	3386 const size_t words = pointer_delta(new_top, dest_addr);
a61af66fc99e Initial load duke parents: diff changeset	3387
a61af66fc99e Initial load duke parents: diff changeset	3388 if (words > 0) {
a61af66fc99e Initial load duke parents: diff changeset	3389 ObjectStartArray* start_array = _space_info[space_id].start_array();
a61af66fc99e Initial load duke parents: diff changeset	3390 MoveAndUpdateClosure closure(bitmap, cm, start_array, dest_addr, words);
a61af66fc99e Initial load duke parents: diff changeset	3391
a61af66fc99e Initial load duke parents: diff changeset	3392 ParMarkBitMap::IterationStatus status;
a61af66fc99e Initial load duke parents: diff changeset	3393 status = bitmap->iterate(&closure, dest_addr, end_addr);
a61af66fc99e Initial load duke parents: diff changeset	3394 assert(status == ParMarkBitMap::full, "iteration not complete");
a61af66fc99e Initial load duke parents: diff changeset	3395 assert(bitmap->find_obj_beg(closure.source(), end_addr) == end_addr,
a61af66fc99e Initial load duke parents: diff changeset	3396 "live objects skipped because closure is full");
a61af66fc99e Initial load duke parents: diff changeset	3397 }
a61af66fc99e Initial load duke parents: diff changeset	3398 }
a61af66fc99e Initial load duke parents: diff changeset	3399
a61af66fc99e Initial load duke parents: diff changeset	3400 jlong PSParallelCompact::millis_since_last_gc() {
4712 e7dead7e90af 7117303: VM uses non-monotonic time source and complains that it is non-monotonic johnc parents: 4099 diff changeset	3401 // We need a monotonically non-deccreasing time in ms but
e7dead7e90af 7117303: VM uses non-monotonic time source and complains that it is non-monotonic johnc parents: 4099 diff changeset	3402 // 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	3403 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	3404 jlong ret_val = now - _time_of_last_gc;
0 a61af66fc99e Initial load duke parents: diff changeset	3405 // XXX See note in genCollectedHeap::millis_since_last_gc().
a61af66fc99e Initial load duke parents: diff changeset	3406 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	3407 NOT_PRODUCT(warning("time warp: "INT64_FORMAT, ret_val);)
0 a61af66fc99e Initial load duke parents: diff changeset	3408 return 0;
a61af66fc99e Initial load duke parents: diff changeset	3409 }
a61af66fc99e Initial load duke parents: diff changeset	3410 return ret_val;
a61af66fc99e Initial load duke parents: diff changeset	3411 }
a61af66fc99e Initial load duke parents: diff changeset	3412
a61af66fc99e Initial load duke parents: diff changeset	3413 void PSParallelCompact::reset_millis_since_last_gc() {
4712 e7dead7e90af 7117303: VM uses non-monotonic time source and complains that it is non-monotonic johnc parents: 4099 diff changeset	3414 // We need a monotonically non-deccreasing time in ms but
e7dead7e90af 7117303: VM uses non-monotonic time source and complains that it is non-monotonic johnc parents: 4099 diff changeset	3415 // 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	3416 _time_of_last_gc = os::javaTimeNanos() / NANOSECS_PER_MILLISEC;
0 a61af66fc99e Initial load duke parents: diff changeset	3417 }
a61af66fc99e Initial load duke parents: diff changeset	3418
a61af66fc99e Initial load duke parents: diff changeset	3419 ParMarkBitMap::IterationStatus MoveAndUpdateClosure::copy_until_full()
a61af66fc99e Initial load duke parents: diff changeset	3420 {
a61af66fc99e Initial load duke parents: diff changeset	3421 if (source() != destination()) {
495 234c22e54b98 6784849: par compact - can fail when to_space is non-empty jcoomes parents: 483 diff changeset	3422 DEBUG_ONLY(PSParallelCompact::check_new_location(source(), destination());)
0 a61af66fc99e Initial load duke parents: diff changeset	3423 Copy::aligned_conjoint_words(source(), destination(), words_remaining());
a61af66fc99e Initial load duke parents: diff changeset	3424 }
a61af66fc99e Initial load duke parents: diff changeset	3425 update_state(words_remaining());
a61af66fc99e Initial load duke parents: diff changeset	3426 assert(is_full(), "sanity");
a61af66fc99e Initial load duke parents: diff changeset	3427 return ParMarkBitMap::full;
a61af66fc99e Initial load duke parents: diff changeset	3428 }
a61af66fc99e Initial load duke parents: diff changeset	3429
a61af66fc99e Initial load duke parents: diff changeset	3430 void MoveAndUpdateClosure::copy_partial_obj()
a61af66fc99e Initial load duke parents: diff changeset	3431 {
a61af66fc99e Initial load duke parents: diff changeset	3432 size_t words = words_remaining();
a61af66fc99e Initial load duke parents: diff changeset	3433
a61af66fc99e Initial load duke parents: diff changeset	3434 HeapWord* const range_end = MIN2(source() + words, bitmap()->region_end());
a61af66fc99e Initial load duke parents: diff changeset	3435 HeapWord* const end_addr = bitmap()->find_obj_end(source(), range_end);
a61af66fc99e Initial load duke parents: diff changeset	3436 if (end_addr < range_end) {
a61af66fc99e Initial load duke parents: diff changeset	3437 words = bitmap()->obj_size(source(), end_addr);
a61af66fc99e Initial load duke parents: diff changeset	3438 }
a61af66fc99e Initial load duke parents: diff changeset	3439
a61af66fc99e Initial load duke parents: diff changeset	3440 // This test is necessary; if omitted, the pointer updates to a partial object
a61af66fc99e Initial load duke parents: diff changeset	3441 // that crosses the dense prefix boundary could be overwritten.
a61af66fc99e Initial load duke parents: diff changeset	3442 if (source() != destination()) {
495 234c22e54b98 6784849: par compact - can fail when to_space is non-empty jcoomes parents: 483 diff changeset	3443 DEBUG_ONLY(PSParallelCompact::check_new_location(source(), destination());)
0 a61af66fc99e Initial load duke parents: diff changeset	3444 Copy::aligned_conjoint_words(source(), destination(), words);
a61af66fc99e Initial load duke parents: diff changeset	3445 }
a61af66fc99e Initial load duke parents: diff changeset	3446 update_state(words);
a61af66fc99e Initial load duke parents: diff changeset	3447 }
a61af66fc99e Initial load duke parents: diff changeset	3448
a61af66fc99e Initial load duke parents: diff changeset	3449 ParMarkBitMapClosure::IterationStatus
a61af66fc99e Initial load duke parents: diff changeset	3450 MoveAndUpdateClosure::do_addr(HeapWord* addr, size_t words) {
a61af66fc99e Initial load duke parents: diff changeset	3451 assert(destination() != NULL, "sanity");
a61af66fc99e Initial load duke parents: diff changeset	3452 assert(bitmap()->obj_size(addr) == words, "bad size");
a61af66fc99e Initial load duke parents: diff changeset	3453
a61af66fc99e Initial load duke parents: diff changeset	3454 _source = addr;
a61af66fc99e Initial load duke parents: diff changeset	3455 assert(PSParallelCompact::summary_data().calc_new_pointer(source()) ==
a61af66fc99e Initial load duke parents: diff changeset	3456 destination(), "wrong destination");
a61af66fc99e Initial load duke parents: diff changeset	3457
a61af66fc99e Initial load duke parents: diff changeset	3458 if (words > words_remaining()) {
a61af66fc99e Initial load duke parents: diff changeset	3459 return ParMarkBitMap::would_overflow;
a61af66fc99e Initial load duke parents: diff changeset	3460 }
a61af66fc99e Initial load duke parents: diff changeset	3461
a61af66fc99e Initial load duke parents: diff changeset	3462 // The start_array must be updated even if the object is not moving.
a61af66fc99e Initial load duke parents: diff changeset	3463 if (_start_array != NULL) {
a61af66fc99e Initial load duke parents: diff changeset	3464 _start_array->allocate_block(destination());
a61af66fc99e Initial load duke parents: diff changeset	3465 }
a61af66fc99e Initial load duke parents: diff changeset	3466
a61af66fc99e Initial load duke parents: diff changeset	3467 if (destination() != source()) {
495 234c22e54b98 6784849: par compact - can fail when to_space is non-empty jcoomes parents: 483 diff changeset	3468 DEBUG_ONLY(PSParallelCompact::check_new_location(source(), destination());)
0 a61af66fc99e Initial load duke parents: diff changeset	3469 Copy::aligned_conjoint_words(source(), destination(), words);
a61af66fc99e Initial load duke parents: diff changeset	3470 }
a61af66fc99e Initial load duke parents: diff changeset	3471
a61af66fc99e Initial load duke parents: diff changeset	3472 oop moved_oop = (oop) destination();
a61af66fc99e Initial load duke parents: diff changeset	3473 moved_oop->update_contents(compaction_manager());
a61af66fc99e Initial load duke parents: diff changeset	3474 assert(moved_oop->is_oop_or_null(), "Object should be whole at this point");
a61af66fc99e Initial load duke parents: diff changeset	3475
a61af66fc99e Initial load duke parents: diff changeset	3476 update_state(words);
a61af66fc99e Initial load duke parents: diff changeset	3477 assert(destination() == (HeapWord*)moved_oop + moved_oop->size(), "sanity");
a61af66fc99e Initial load duke parents: diff changeset	3478 return is_full() ? ParMarkBitMap::full : ParMarkBitMap::incomplete;
a61af66fc99e Initial load duke parents: diff changeset	3479 }
a61af66fc99e Initial load duke parents: diff changeset	3480
a61af66fc99e Initial load duke parents: diff changeset	3481 UpdateOnlyClosure::UpdateOnlyClosure(ParMarkBitMap* mbm,
a61af66fc99e Initial load duke parents: diff changeset	3482 ParCompactionManager* cm,
a61af66fc99e Initial load duke parents: diff changeset	3483 PSParallelCompact::SpaceId space_id) :
a61af66fc99e Initial load duke parents: diff changeset	3484 ParMarkBitMapClosure(mbm, cm),
a61af66fc99e Initial load duke parents: diff changeset	3485 _space_id(space_id),
a61af66fc99e Initial load duke parents: diff changeset	3486 _start_array(PSParallelCompact::start_array(space_id))
a61af66fc99e Initial load duke parents: diff changeset	3487 {
a61af66fc99e Initial load duke parents: diff changeset	3488 }
a61af66fc99e Initial load duke parents: diff changeset	3489
a61af66fc99e Initial load duke parents: diff changeset	3490 // Updates the references in the object to their new values.
a61af66fc99e Initial load duke parents: diff changeset	3491 ParMarkBitMapClosure::IterationStatus
a61af66fc99e Initial load duke parents: diff changeset	3492 UpdateOnlyClosure::do_addr(HeapWord* addr, size_t words) {
a61af66fc99e Initial load duke parents: diff changeset	3493 do_addr(addr);
a61af66fc99e Initial load duke parents: diff changeset	3494 return ParMarkBitMap::incomplete;
a61af66fc99e Initial load duke parents: diff changeset	3495 }
a61af66fc99e Initial load duke parents: diff changeset	3496
a61af66fc99e Initial load duke parents: diff changeset	3497 // Prepare for compaction. This method is executed once
a61af66fc99e Initial load duke parents: diff changeset	3498 // (i.e., by a single thread) before compaction.
a61af66fc99e Initial load duke parents: diff changeset	3499 // Save the updated location of the intArrayKlassObj for
a61af66fc99e Initial load duke parents: diff changeset	3500 // filling holes in the dense prefix.
a61af66fc99e Initial load duke parents: diff changeset	3501 void PSParallelCompact::compact_prologue() {
a61af66fc99e Initial load duke parents: diff changeset	3502 _updated_int_array_klass_obj = (klassOop)
a61af66fc99e Initial load duke parents: diff changeset	3503 summary_data().calc_new_pointer(Universe::intArrayKlassObj());
a61af66fc99e Initial load duke parents: diff changeset	3504 }
a61af66fc99e Initial load duke parents: diff changeset	3505

Mercurial > hg > truffle

annotate src/share/vm/gc_implementation/parallelScavenge/psParallelCompact.cpp @ 4712:e7dead7e90af