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

annotate src/share/vm/gc_implementation/parallelScavenge/psParallelCompact.cpp @ 1836:894b1d7c7e01

6423256: GC stacks should use a better data structure 6942771: SEGV in ParScanThreadState::take_from_overflow_stack Reviewed-by: apetrusenko, ysr, pbk

author	jcoomes
date	Tue, 28 Sep 2010 15:56:15 -0700
parents	8b10f48633dc
children	f95d63e2154a

rev	line source
0 a61af66fc99e Initial load duke parents: diff changeset	1 /*
1552 c18cbe5936b8 6941466: Oracle rebranding changes for Hotspot repositories trims parents: 1489 diff changeset	2 * Copyright (c) 2005, 2010, 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
a61af66fc99e Initial load duke parents: diff changeset	25 #include "incls/_precompiled.incl"
a61af66fc99e Initial load duke parents: diff changeset	26 #include "incls/_psParallelCompact.cpp.incl"
a61af66fc99e Initial load duke parents: diff changeset	27
a61af66fc99e Initial load duke parents: diff changeset	28 #include <math.h>
a61af66fc99e Initial load duke parents: diff changeset	29
a61af66fc99e Initial load duke parents: diff changeset	30 // All sizes are in HeapWords.
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	31 const size_t ParallelCompactData::Log2RegionSize = 9; // 512 words
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	32 const size_t ParallelCompactData::RegionSize = (size_t)1 << Log2RegionSize;
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	33 const size_t ParallelCompactData::RegionSizeBytes =
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	34 RegionSize << LogHeapWordSize;
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	35 const size_t ParallelCompactData::RegionSizeOffsetMask = RegionSize - 1;
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	36 const size_t ParallelCompactData::RegionAddrOffsetMask = RegionSizeBytes - 1;
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	37 const size_t ParallelCompactData::RegionAddrMask = ~RegionAddrOffsetMask;
0 a61af66fc99e Initial load duke parents: diff changeset	38
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	39 const ParallelCompactData::RegionData::region_sz_t
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	40 ParallelCompactData::RegionData::dc_shift = 27;
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	41
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	42 const ParallelCompactData::RegionData::region_sz_t
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	43 ParallelCompactData::RegionData::dc_mask = ~0U << dc_shift;
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	44
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	45 const ParallelCompactData::RegionData::region_sz_t
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	46 ParallelCompactData::RegionData::dc_one = 0x1U << dc_shift;
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	47
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	48 const ParallelCompactData::RegionData::region_sz_t
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	49 ParallelCompactData::RegionData::los_mask = ~dc_mask;
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	50
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	51 const ParallelCompactData::RegionData::region_sz_t
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	52 ParallelCompactData::RegionData::dc_claimed = 0x8U << dc_shift;
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	53
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	54 const ParallelCompactData::RegionData::region_sz_t
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	55 ParallelCompactData::RegionData::dc_completed = 0xcU << dc_shift;
0 a61af66fc99e Initial load duke parents: diff changeset	56
a61af66fc99e Initial load duke parents: diff changeset	57 SpaceInfo PSParallelCompact::_space_info[PSParallelCompact::last_space_id];
a61af66fc99e Initial load duke parents: diff changeset	58 bool PSParallelCompact::_print_phases = false;
a61af66fc99e Initial load duke parents: diff changeset	59
a61af66fc99e Initial load duke parents: diff changeset	60 ReferenceProcessor* PSParallelCompact::_ref_processor = NULL;
a61af66fc99e Initial load duke parents: diff changeset	61 klassOop PSParallelCompact::_updated_int_array_klass_obj = NULL;
a61af66fc99e Initial load duke parents: diff changeset	62
a61af66fc99e Initial load duke parents: diff changeset	63 double PSParallelCompact::_dwl_mean;
a61af66fc99e Initial load duke parents: diff changeset	64 double PSParallelCompact::_dwl_std_dev;
a61af66fc99e Initial load duke parents: diff changeset	65 double PSParallelCompact::_dwl_first_term;
a61af66fc99e Initial load duke parents: diff changeset	66 double PSParallelCompact::_dwl_adjustment;
a61af66fc99e Initial load duke parents: diff changeset	67 #ifdef ASSERT
a61af66fc99e Initial load duke parents: diff changeset	68 bool PSParallelCompact::_dwl_initialized = false;
a61af66fc99e Initial load duke parents: diff changeset	69 #endif // #ifdef ASSERT
a61af66fc99e Initial load duke parents: diff changeset	70
a61af66fc99e Initial load duke parents: diff changeset	71 #ifdef VALIDATE_MARK_SWEEP
113 ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 79 diff changeset	72 GrowableArray<void> PSParallelCompact::_root_refs_stack = NULL;
0 a61af66fc99e Initial load duke parents: diff changeset	73 GrowableArray<oop> * PSParallelCompact::_live_oops = NULL;
a61af66fc99e Initial load duke parents: diff changeset	74 GrowableArray<oop> * PSParallelCompact::_live_oops_moved_to = NULL;
a61af66fc99e Initial load duke parents: diff changeset	75 GrowableArray<size_t>* PSParallelCompact::_live_oops_size = NULL;
a61af66fc99e Initial load duke parents: diff changeset	76 size_t PSParallelCompact::_live_oops_index = 0;
a61af66fc99e Initial load duke parents: diff changeset	77 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	78 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	79 GrowableArray<void> PSParallelCompact::_adjusted_pointers = NULL;
0 a61af66fc99e Initial load duke parents: diff changeset	80 bool PSParallelCompact::_pointer_tracking = false;
a61af66fc99e Initial load duke parents: diff changeset	81 bool PSParallelCompact::_root_tracking = true;
a61af66fc99e Initial load duke parents: diff changeset	82
a61af66fc99e Initial load duke parents: diff changeset	83 GrowableArray<HeapWord> PSParallelCompact::_cur_gc_live_oops = NULL;
a61af66fc99e Initial load duke parents: diff changeset	84 GrowableArray<HeapWord> PSParallelCompact::_cur_gc_live_oops_moved_to = NULL;
a61af66fc99e Initial load duke parents: diff changeset	85 GrowableArray<size_t> * PSParallelCompact::_cur_gc_live_oops_size = NULL;
a61af66fc99e Initial load duke parents: diff changeset	86 GrowableArray<HeapWord> PSParallelCompact::_last_gc_live_oops = NULL;
a61af66fc99e Initial load duke parents: diff changeset	87 GrowableArray<HeapWord> PSParallelCompact::_last_gc_live_oops_moved_to = NULL;
a61af66fc99e Initial load duke parents: diff changeset	88 GrowableArray<size_t> * PSParallelCompact::_last_gc_live_oops_size = NULL;
a61af66fc99e Initial load duke parents: diff changeset	89 #endif
a61af66fc99e Initial load duke parents: diff changeset	90
482 7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	91 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	92 HeapWord* destination)
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	93 {
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	94 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	95 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	96 assert(destination != NULL, "invalid destination argument");
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	97
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	98 _src_region_idx = src_region_idx;
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	99 _partial_obj_size = partial_obj_size;
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	100 _destination = destination;
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	101
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	102 // 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	103 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	104 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	105
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	106 // 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	107 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	108 const ParallelCompactData& sd = PSParallelCompact::summary_data();
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	109 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	110 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	111
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	112 if (beg_region_addr == end_region_addr) {
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	113 // One destination region.
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	114 _destination_count = 1;
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	115 if (end_region_addr == destination) {
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	116 // 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	117 // 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	118 _dest_region_addr = end_region_addr;
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	119 _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	120 }
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	121 } else {
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	122 // 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	123 // 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	124 // 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	125 _destination_count = 2;
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	126 _dest_region_addr = end_region_addr;
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	127 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	128 assert(ofs < _partial_obj_size, "sanity");
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	129 _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	130 }
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	131 }
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	132
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	133 void SplitInfo::clear()
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	134 {
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	135 _src_region_idx = 0;
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	136 _partial_obj_size = 0;
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	137 _destination = NULL;
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	138 _destination_count = 0;
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	139 _dest_region_addr = NULL;
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	140 _first_src_addr = NULL;
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	141 assert(!is_valid(), "sanity");
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
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	144 #ifdef ASSERT
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	145 void SplitInfo::verify_clear()
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	146 {
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	147 assert(_src_region_idx == 0, "not clear");
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	148 assert(_partial_obj_size == 0, "not clear");
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	149 assert(_destination == NULL, "not clear");
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	150 assert(_destination_count == 0, "not clear");
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	151 assert(_dest_region_addr == NULL, "not clear");
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	152 assert(_first_src_addr == NULL, "not clear");
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	153 }
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	154 #endif // #ifdef ASSERT
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	155
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	156
0 a61af66fc99e Initial load duke parents: diff changeset	157 #ifndef PRODUCT
a61af66fc99e Initial load duke parents: diff changeset	158 const char* PSParallelCompact::space_names[] = {
a61af66fc99e Initial load duke parents: diff changeset	159 "perm", "old ", "eden", "from", "to "
a61af66fc99e Initial load duke parents: diff changeset	160 };
a61af66fc99e Initial load duke parents: diff changeset	161
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	162 void PSParallelCompact::print_region_ranges()
0 a61af66fc99e Initial load duke parents: diff changeset	163 {
a61af66fc99e Initial load duke parents: diff changeset	164 tty->print_cr("space bottom top end new_top");
a61af66fc99e Initial load duke parents: diff changeset	165 tty->print_cr("------ ---------- ---------- ---------- ----------");
a61af66fc99e Initial load duke parents: diff changeset	166
a61af66fc99e Initial load duke parents: diff changeset	167 for (unsigned int id = 0; id < last_space_id; ++id) {
a61af66fc99e Initial load duke parents: diff changeset	168 const MutableSpace* space = _space_info[id].space();
a61af66fc99e Initial load duke parents: diff changeset	169 tty->print_cr("%u %s "
264 15dd2594d08e 6718283: existing uses of _FORMAT_W() were broken by 6521491 jcoomes* parents: 263 diff changeset	170 SIZE_FORMAT_W(10) " " SIZE_FORMAT_W(10) " "
15dd2594d08e 6718283: existing uses of _FORMAT_W() were broken by 6521491 jcoomes* parents: 263 diff changeset	171 SIZE_FORMAT_W(10) " " SIZE_FORMAT_W(10) " ",
0 a61af66fc99e Initial load duke parents: diff changeset	172 id, space_names[id],
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	173 summary_data().addr_to_region_idx(space->bottom()),
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	174 summary_data().addr_to_region_idx(space->top()),
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	175 summary_data().addr_to_region_idx(space->end()),
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	176 summary_data().addr_to_region_idx(_space_info[id].new_top()));
0 a61af66fc99e Initial load duke parents: diff changeset	177 }
a61af66fc99e Initial load duke parents: diff changeset	178 }
a61af66fc99e Initial load duke parents: diff changeset	179
a61af66fc99e Initial load duke parents: diff changeset	180 void
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	181 print_generic_summary_region(size_t i, const ParallelCompactData::RegionData* c)
0 a61af66fc99e Initial load duke parents: diff changeset	182 {
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	183 #define REGION_IDX_FORMAT SIZE_FORMAT_W(7)
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	184 #define REGION_DATA_FORMAT SIZE_FORMAT_W(5)
0 a61af66fc99e Initial load duke parents: diff changeset	185
a61af66fc99e Initial load duke parents: diff changeset	186 ParallelCompactData& sd = PSParallelCompact::summary_data();
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	187 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	188 tty->print_cr(REGION_IDX_FORMAT " " PTR_FORMAT " "
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	189 REGION_IDX_FORMAT " " PTR_FORMAT " "
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	190 REGION_DATA_FORMAT " " REGION_DATA_FORMAT " "
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	191 REGION_DATA_FORMAT " " REGION_IDX_FORMAT " %d",
0 a61af66fc99e Initial load duke parents: diff changeset	192 i, c->data_location(), dci, c->destination(),
a61af66fc99e Initial load duke parents: diff changeset	193 c->partial_obj_size(), c->live_obj_size(),
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	194 c->data_size(), c->source_region(), c->destination_count());
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	195
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	196 #undef REGION_IDX_FORMAT
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	197 #undef REGION_DATA_FORMAT
0 a61af66fc99e Initial load duke parents: diff changeset	198 }
a61af66fc99e Initial load duke parents: diff changeset	199
a61af66fc99e Initial load duke parents: diff changeset	200 void
a61af66fc99e Initial load duke parents: diff changeset	201 print_generic_summary_data(ParallelCompactData& summary_data,
a61af66fc99e Initial load duke parents: diff changeset	202 HeapWord* const beg_addr,
a61af66fc99e Initial load duke parents: diff changeset	203 HeapWord* const end_addr)
a61af66fc99e Initial load duke parents: diff changeset	204 {
a61af66fc99e Initial load duke parents: diff changeset	205 size_t total_words = 0;
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	206 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	207 const size_t last = summary_data.addr_to_region_idx(end_addr);
0 a61af66fc99e Initial load duke parents: diff changeset	208 HeapWord* pdest = 0;
a61af66fc99e Initial load duke parents: diff changeset	209
a61af66fc99e Initial load duke parents: diff changeset	210 while (i <= last) {
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	211 ParallelCompactData::RegionData* c = summary_data.region(i);
0 a61af66fc99e Initial load duke parents: diff changeset	212 if (c->data_size() != 0 \|\| c->destination() != pdest) {
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	213 print_generic_summary_region(i, c);
0 a61af66fc99e Initial load duke parents: diff changeset	214 total_words += c->data_size();
a61af66fc99e Initial load duke parents: diff changeset	215 pdest = c->destination();
a61af66fc99e Initial load duke parents: diff changeset	216 }
a61af66fc99e Initial load duke parents: diff changeset	217 ++i;
a61af66fc99e Initial load duke parents: diff changeset	218 }
a61af66fc99e Initial load duke parents: diff changeset	219
a61af66fc99e Initial load duke parents: diff changeset	220 tty->print_cr("summary_data_bytes=" SIZE_FORMAT, total_words * HeapWordSize);
a61af66fc99e Initial load duke parents: diff changeset	221 }
a61af66fc99e Initial load duke parents: diff changeset	222
a61af66fc99e Initial load duke parents: diff changeset	223 void
a61af66fc99e Initial load duke parents: diff changeset	224 print_generic_summary_data(ParallelCompactData& summary_data,
a61af66fc99e Initial load duke parents: diff changeset	225 SpaceInfo* space_info)
a61af66fc99e Initial load duke parents: diff changeset	226 {
a61af66fc99e Initial load duke parents: diff changeset	227 for (unsigned int id = 0; id < PSParallelCompact::last_space_id; ++id) {
a61af66fc99e Initial load duke parents: diff changeset	228 const MutableSpace* space = space_info[id].space();
a61af66fc99e Initial load duke parents: diff changeset	229 print_generic_summary_data(summary_data, space->bottom(),
a61af66fc99e Initial load duke parents: diff changeset	230 MAX2(space->top(), space_info[id].new_top()));
a61af66fc99e Initial load duke parents: diff changeset	231 }
a61af66fc99e Initial load duke parents: diff changeset	232 }
a61af66fc99e Initial load duke parents: diff changeset	233
a61af66fc99e Initial load duke parents: diff changeset	234 void
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	235 print_initial_summary_region(size_t i,
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	236 const ParallelCompactData::RegionData* c,
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	237 bool newline = true)
0 a61af66fc99e Initial load duke parents: diff changeset	238 {
264 15dd2594d08e 6718283: existing uses of _FORMAT_W() were broken by 6521491 jcoomes* parents: 263 diff changeset	239 tty->print(SIZE_FORMAT_W(5) " " PTR_FORMAT " "
15dd2594d08e 6718283: existing uses of _FORMAT_W() were broken by 6521491 jcoomes* parents: 263 diff changeset	240 SIZE_FORMAT_W(5) " " SIZE_FORMAT_W(5) " "
15dd2594d08e 6718283: existing uses of _FORMAT_W() were broken by 6521491 jcoomes* parents: 263 diff changeset	241 SIZE_FORMAT_W(5) " " SIZE_FORMAT_W(5) " %d",
0 a61af66fc99e Initial load duke parents: diff changeset	242 i, c->destination(),
a61af66fc99e Initial load duke parents: diff changeset	243 c->partial_obj_size(), c->live_obj_size(),
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	244 c->data_size(), c->source_region(), c->destination_count());
0 a61af66fc99e Initial load duke parents: diff changeset	245 if (newline) tty->cr();
a61af66fc99e Initial load duke parents: diff changeset	246 }
a61af66fc99e Initial load duke parents: diff changeset	247
a61af66fc99e Initial load duke parents: diff changeset	248 void
a61af66fc99e Initial load duke parents: diff changeset	249 print_initial_summary_data(ParallelCompactData& summary_data,
a61af66fc99e Initial load duke parents: diff changeset	250 const MutableSpace* space) {
a61af66fc99e Initial load duke parents: diff changeset	251 if (space->top() == space->bottom()) {
a61af66fc99e Initial load duke parents: diff changeset	252 return;
a61af66fc99e Initial load duke parents: diff changeset	253 }
a61af66fc99e Initial load duke parents: diff changeset	254
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	255 const size_t region_size = ParallelCompactData::RegionSize;
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	256 typedef ParallelCompactData::RegionData RegionData;
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	257 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	258 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	259 const RegionData* c = summary_data.region(end_region - 1);
0 a61af66fc99e Initial load duke parents: diff changeset	260 HeapWord* end_addr = c->destination() + c->data_size();
a61af66fc99e Initial load duke parents: diff changeset	261 const size_t live_in_space = pointer_delta(end_addr, space->bottom());
a61af66fc99e Initial load duke parents: diff changeset	262
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	263 // 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	264 size_t full_region_count = 0;
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	265 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	266 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	267 print_initial_summary_region(i, summary_data.region(i));
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	268 ++full_region_count;
0 a61af66fc99e Initial load duke parents: diff changeset	269 ++i;
a61af66fc99e Initial load duke parents: diff changeset	270 }
a61af66fc99e Initial load duke parents: diff changeset	271
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	272 size_t live_to_right = live_in_space - full_region_count * region_size;
0 a61af66fc99e Initial load duke parents: diff changeset	273
a61af66fc99e Initial load duke parents: diff changeset	274 double max_reclaimed_ratio = 0.0;
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	275 size_t max_reclaimed_ratio_region = 0;
0 a61af66fc99e Initial load duke parents: diff changeset	276 size_t max_dead_to_right = 0;
a61af66fc99e Initial load duke parents: diff changeset	277 size_t max_live_to_right = 0;
a61af66fc99e Initial load duke parents: diff changeset	278
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	279 // 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	280 // the region or to the right of it. The remaining regions are empty (and
0 a61af66fc99e Initial load duke parents: diff changeset	281 // 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	282 while (i < end_region && live_to_right > 0) {
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	283 c = summary_data.region(i);
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	284 HeapWord* const region_addr = summary_data.region_to_addr(i);
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	285 const size_t used_to_right = pointer_delta(space->top(), region_addr);
0 a61af66fc99e Initial load duke parents: diff changeset	286 const size_t dead_to_right = used_to_right - live_to_right;
a61af66fc99e Initial load duke parents: diff changeset	287 const double reclaimed_ratio = double(dead_to_right) / live_to_right;
a61af66fc99e Initial load duke parents: diff changeset	288
a61af66fc99e Initial load duke parents: diff changeset	289 if (reclaimed_ratio > max_reclaimed_ratio) {
a61af66fc99e Initial load duke parents: diff changeset	290 max_reclaimed_ratio = reclaimed_ratio;
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	291 max_reclaimed_ratio_region = i;
0 a61af66fc99e Initial load duke parents: diff changeset	292 max_dead_to_right = dead_to_right;
a61af66fc99e Initial load duke parents: diff changeset	293 max_live_to_right = live_to_right;
a61af66fc99e Initial load duke parents: diff changeset	294 }
a61af66fc99e Initial load duke parents: diff changeset	295
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	296 print_initial_summary_region(i, c, false);
264 15dd2594d08e 6718283: existing uses of _FORMAT_W() were broken by 6521491 jcoomes* parents: 263 diff changeset	297 tty->print_cr(" %12.10f " SIZE_FORMAT_W(10) " " SIZE_FORMAT_W(10),
0 a61af66fc99e Initial load duke parents: diff changeset	298 reclaimed_ratio, dead_to_right, live_to_right);
a61af66fc99e Initial load duke parents: diff changeset	299
a61af66fc99e Initial load duke parents: diff changeset	300 live_to_right -= c->data_size();
a61af66fc99e Initial load duke parents: diff changeset	301 ++i;
a61af66fc99e Initial load duke parents: diff changeset	302 }
a61af66fc99e Initial load duke parents: diff changeset	303
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	304 // 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	305 if (i < end_region) {
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	306 print_initial_summary_region(i, summary_data.region(i));
0 a61af66fc99e Initial load duke parents: diff changeset	307 }
a61af66fc99e Initial load duke parents: diff changeset	308
264 15dd2594d08e 6718283: existing uses of _FORMAT_W() were broken by 6521491 jcoomes* parents: 263 diff changeset	309 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	310 "l2r=" SIZE_FORMAT_W(10) " max_ratio=%14.12f",
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	311 max_reclaimed_ratio_region, max_dead_to_right,
0 a61af66fc99e Initial load duke parents: diff changeset	312 max_live_to_right, max_reclaimed_ratio);
a61af66fc99e Initial load duke parents: diff changeset	313 }
a61af66fc99e Initial load duke parents: diff changeset	314
a61af66fc99e Initial load duke parents: diff changeset	315 void
a61af66fc99e Initial load duke parents: diff changeset	316 print_initial_summary_data(ParallelCompactData& summary_data,
a61af66fc99e Initial load duke parents: diff changeset	317 SpaceInfo* space_info) {
a61af66fc99e Initial load duke parents: diff changeset	318 unsigned int id = PSParallelCompact::perm_space_id;
a61af66fc99e Initial load duke parents: diff changeset	319 const MutableSpace* space;
a61af66fc99e Initial load duke parents: diff changeset	320 do {
a61af66fc99e Initial load duke parents: diff changeset	321 space = space_info[id].space();
a61af66fc99e Initial load duke parents: diff changeset	322 print_initial_summary_data(summary_data, space);
a61af66fc99e Initial load duke parents: diff changeset	323 } while (++id < PSParallelCompact::eden_space_id);
a61af66fc99e Initial load duke parents: diff changeset	324
a61af66fc99e Initial load duke parents: diff changeset	325 do {
a61af66fc99e Initial load duke parents: diff changeset	326 space = space_info[id].space();
a61af66fc99e Initial load duke parents: diff changeset	327 print_generic_summary_data(summary_data, space->bottom(), space->top());
a61af66fc99e Initial load duke parents: diff changeset	328 } while (++id < PSParallelCompact::last_space_id);
a61af66fc99e Initial load duke parents: diff changeset	329 }
a61af66fc99e Initial load duke parents: diff changeset	330 #endif // #ifndef PRODUCT
a61af66fc99e Initial load duke parents: diff changeset	331
a61af66fc99e Initial load duke parents: diff changeset	332 #ifdef ASSERT
a61af66fc99e Initial load duke parents: diff changeset	333 size_t add_obj_count;
a61af66fc99e Initial load duke parents: diff changeset	334 size_t add_obj_size;
a61af66fc99e Initial load duke parents: diff changeset	335 size_t mark_bitmap_count;
a61af66fc99e Initial load duke parents: diff changeset	336 size_t mark_bitmap_size;
a61af66fc99e Initial load duke parents: diff changeset	337 #endif // #ifdef ASSERT
a61af66fc99e Initial load duke parents: diff changeset	338
a61af66fc99e Initial load duke parents: diff changeset	339 ParallelCompactData::ParallelCompactData()
a61af66fc99e Initial load duke parents: diff changeset	340 {
a61af66fc99e Initial load duke parents: diff changeset	341 _region_start = 0;
a61af66fc99e Initial load duke parents: diff changeset	342
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	343 _region_vspace = 0;
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	344 _region_data = 0;
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	345 _region_count = 0;
0 a61af66fc99e Initial load duke parents: diff changeset	346 }
a61af66fc99e Initial load duke parents: diff changeset	347
a61af66fc99e Initial load duke parents: diff changeset	348 bool ParallelCompactData::initialize(MemRegion covered_region)
a61af66fc99e Initial load duke parents: diff changeset	349 {
a61af66fc99e Initial load duke parents: diff changeset	350 _region_start = covered_region.start();
a61af66fc99e Initial load duke parents: diff changeset	351 const size_t region_size = covered_region.word_size();
a61af66fc99e Initial load duke parents: diff changeset	352 DEBUG_ONLY(_region_end = _region_start + region_size;)
a61af66fc99e Initial load duke parents: diff changeset	353
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	354 assert(region_align_down(_region_start) == _region_start,
0 a61af66fc99e Initial load duke parents: diff changeset	355 "region start not aligned");
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	356 assert((region_size & RegionSizeOffsetMask) == 0,
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	357 "region size not a multiple of RegionSize");
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	358
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	359 bool result = initialize_region_data(region_size);
0 a61af66fc99e Initial load duke parents: diff changeset	360
a61af66fc99e Initial load duke parents: diff changeset	361 return result;
a61af66fc99e Initial load duke parents: diff changeset	362 }
a61af66fc99e Initial load duke parents: diff changeset	363
a61af66fc99e Initial load duke parents: diff changeset	364 PSVirtualSpace*
a61af66fc99e Initial load duke parents: diff changeset	365 ParallelCompactData::create_vspace(size_t count, size_t element_size)
a61af66fc99e Initial load duke parents: diff changeset	366 {
a61af66fc99e Initial load duke parents: diff changeset	367 const size_t raw_bytes = count * element_size;
a61af66fc99e Initial load duke parents: diff changeset	368 const size_t page_sz = os::page_size_for_region(raw_bytes, raw_bytes, 10);
a61af66fc99e Initial load duke parents: diff changeset	369 const size_t granularity = os::vm_allocation_granularity();
a61af66fc99e Initial load duke parents: diff changeset	370 const size_t bytes = align_size_up(raw_bytes, MAX2(page_sz, granularity));
a61af66fc99e Initial load duke parents: diff changeset	371
a61af66fc99e Initial load duke parents: diff changeset	372 const size_t rs_align = page_sz == (size_t) os::vm_page_size() ? 0 :
a61af66fc99e Initial load duke parents: diff changeset	373 MAX2(page_sz, granularity);
79 82db0859acbe 6642862: Code cache allocation fails with large pages after 6588638 jcoomes parents: 0 diff changeset	374 ReservedSpace rs(bytes, rs_align, rs_align > 0);
0 a61af66fc99e Initial load duke parents: diff changeset	375 os::trace_page_sizes("par compact", raw_bytes, raw_bytes, page_sz, rs.base(),
a61af66fc99e Initial load duke parents: diff changeset	376 rs.size());
a61af66fc99e Initial load duke parents: diff changeset	377 PSVirtualSpace* vspace = new PSVirtualSpace(rs, page_sz);
a61af66fc99e Initial load duke parents: diff changeset	378 if (vspace != 0) {
a61af66fc99e Initial load duke parents: diff changeset	379 if (vspace->expand_by(bytes)) {
a61af66fc99e Initial load duke parents: diff changeset	380 return vspace;
a61af66fc99e Initial load duke parents: diff changeset	381 }
a61af66fc99e Initial load duke parents: diff changeset	382 delete vspace;
237 1fdb98a17101 6716785: implicit null checks not triggering with CompressedOops coleenp parents: 235 diff changeset	383 // Release memory reserved in the space.
1fdb98a17101 6716785: implicit null checks not triggering with CompressedOops coleenp parents: 235 diff changeset	384 rs.release();
0 a61af66fc99e Initial load duke parents: diff changeset	385 }
a61af66fc99e Initial load duke parents: diff changeset	386
a61af66fc99e Initial load duke parents: diff changeset	387 return 0;
a61af66fc99e Initial load duke parents: diff changeset	388 }
a61af66fc99e Initial load duke parents: diff changeset	389
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	390 bool ParallelCompactData::initialize_region_data(size_t region_size)
0 a61af66fc99e Initial load duke parents: diff changeset	391 {
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	392 const size_t count = (region_size + RegionSizeOffsetMask) >> Log2RegionSize;
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	393 _region_vspace = create_vspace(count, sizeof(RegionData));
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	394 if (_region_vspace != 0) {
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	395 _region_data = (RegionData*)_region_vspace->reserved_low_addr();
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	396 _region_count = count;
0 a61af66fc99e Initial load duke parents: diff changeset	397 return true;
a61af66fc99e Initial load duke parents: diff changeset	398 }
a61af66fc99e Initial load duke parents: diff changeset	399 return false;
a61af66fc99e Initial load duke parents: diff changeset	400 }
a61af66fc99e Initial load duke parents: diff changeset	401
a61af66fc99e Initial load duke parents: diff changeset	402 void ParallelCompactData::clear()
a61af66fc99e Initial load duke parents: diff changeset	403 {
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	404 memset(_region_data, 0, _region_vspace->committed_size());
0 a61af66fc99e Initial load duke parents: diff changeset	405 }
a61af66fc99e Initial load duke parents: diff changeset	406
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	407 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	408 assert(beg_region <= _region_count, "beg_region out of range");
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	409 assert(end_region <= _region_count, "end_region out of range");
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	410
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	411 const size_t region_cnt = end_region - beg_region;
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	412 memset(_region_data + beg_region, 0, region_cnt * sizeof(RegionData));
0 a61af66fc99e Initial load duke parents: diff changeset	413 }
a61af66fc99e Initial load duke parents: diff changeset	414
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	415 HeapWord* ParallelCompactData::partial_obj_end(size_t region_idx) const
0 a61af66fc99e Initial load duke parents: diff changeset	416 {
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	417 const RegionData* cur_cp = region(region_idx);
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	418 const RegionData* const end_cp = region(region_count() - 1);
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	419
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	420 HeapWord* result = region_to_addr(region_idx);
0 a61af66fc99e Initial load duke parents: diff changeset	421 if (cur_cp < end_cp) {
a61af66fc99e Initial load duke parents: diff changeset	422 do {
a61af66fc99e Initial load duke parents: diff changeset	423 result += cur_cp->partial_obj_size();
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	424 } while (cur_cp->partial_obj_size() == RegionSize && ++cur_cp < end_cp);
0 a61af66fc99e Initial load duke parents: diff changeset	425 }
a61af66fc99e Initial load duke parents: diff changeset	426 return result;
a61af66fc99e Initial load duke parents: diff changeset	427 }
a61af66fc99e Initial load duke parents: diff changeset	428
a61af66fc99e Initial load duke parents: diff changeset	429 void ParallelCompactData::add_obj(HeapWord* addr, size_t len)
a61af66fc99e Initial load duke parents: diff changeset	430 {
a61af66fc99e Initial load duke parents: diff changeset	431 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	432 const size_t beg_region = obj_ofs >> Log2RegionSize;
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	433 const size_t end_region = (obj_ofs + len - 1) >> Log2RegionSize;
0 a61af66fc99e Initial load duke parents: diff changeset	434
a61af66fc99e Initial load duke parents: diff changeset	435 DEBUG_ONLY(Atomic::inc_ptr(&add_obj_count);)
a61af66fc99e Initial load duke parents: diff changeset	436 DEBUG_ONLY(Atomic::add_ptr(len, &add_obj_size);)
a61af66fc99e Initial load duke parents: diff changeset	437
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	438 if (beg_region == end_region) {
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	439 // All in one region.
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	440 _region_data[beg_region].add_live_obj(len);
0 a61af66fc99e Initial load duke parents: diff changeset	441 return;
a61af66fc99e Initial load duke parents: diff changeset	442 }
a61af66fc99e Initial load duke parents: diff changeset	443
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	444 // First region.
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	445 const size_t beg_ofs = region_offset(addr);
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	446 _region_data[beg_region].add_live_obj(RegionSize - beg_ofs);
0 a61af66fc99e Initial load duke parents: diff changeset	447
a61af66fc99e Initial load duke parents: diff changeset	448 klassOop klass = ((oop)addr)->klass();
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	449 // Middle regions--completely spanned by this object.
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	450 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	451 _region_data[region].set_partial_obj_size(RegionSize);
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	452 _region_data[region].set_partial_obj_addr(addr);
0 a61af66fc99e Initial load duke parents: diff changeset	453 }
a61af66fc99e Initial load duke parents: diff changeset	454
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	455 // Last region.
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	456 const size_t end_ofs = region_offset(addr + len - 1);
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	457 _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	458 _region_data[end_region].set_partial_obj_addr(addr);
0 a61af66fc99e Initial load duke parents: diff changeset	459 }
a61af66fc99e Initial load duke parents: diff changeset	460
a61af66fc99e Initial load duke parents: diff changeset	461 void
a61af66fc99e Initial load duke parents: diff changeset	462 ParallelCompactData::summarize_dense_prefix(HeapWord* beg, HeapWord* end)
a61af66fc99e Initial load duke parents: diff changeset	463 {
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	464 assert(region_offset(beg) == 0, "not RegionSize aligned");
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	465 assert(region_offset(end) == 0, "not RegionSize aligned");
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	466
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	467 size_t cur_region = addr_to_region_idx(beg);
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	468 const size_t end_region = addr_to_region_idx(end);
0 a61af66fc99e Initial load duke parents: diff changeset	469 HeapWord* addr = beg;
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	470 while (cur_region < end_region) {
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	471 _region_data[cur_region].set_destination(addr);
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	472 _region_data[cur_region].set_destination_count(0);
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	473 _region_data[cur_region].set_source_region(cur_region);
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	474 _region_data[cur_region].set_data_location(addr);
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	475
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	476 // Update live_obj_size so the region appears completely full.
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	477 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	478 _region_data[cur_region].set_live_obj_size(live_size);
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	479
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	480 ++cur_region;
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	481 addr += RegionSize;
0 a61af66fc99e Initial load duke parents: diff changeset	482 }
a61af66fc99e Initial load duke parents: diff changeset	483 }
a61af66fc99e Initial load duke parents: diff changeset	484
482 7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	485 // 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	486 // split point.
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	487 //
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	488 // 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	489 // 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	490 // region (an "easy" split, no extra bookkeeping required).
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	491 //
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	492 // 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	493 // 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	494 // 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	495 // 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	496 // 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	497 // 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	498 // 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	499 // 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	500 // split).
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	501 HeapWord*
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	502 ParallelCompactData::summarize_split_space(size_t src_region,
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	503 SplitInfo& split_info,
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	504 HeapWord* destination,
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	505 HeapWord* target_end,
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	506 HeapWord** target_next)
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	507 {
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	508 assert(destination <= target_end, "sanity");
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	509 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	510 "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	511 assert(is_region_aligned(target_end), "sanity");
482 7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	512
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	513 size_t split_region = src_region;
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	514 HeapWord* split_destination = destination;
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	515 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	516
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	517 if (destination + partial_obj_size > target_end) {
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	518 // 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	519 // 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	520 // destination space.
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	521 //
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	522 // 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	523 // region containing it.
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	524 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	525 split_region = addr_to_region_idx(overflow_obj);
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	526
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	527 // 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	528 // 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	529 // implies a region must be filled).
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	530 //
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	531 // 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	532 // 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	533 // 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	534 // object as opposed to just one field.)
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	535 //
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	536 // 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	537 // 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	538 //
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	539 // max(top, max(new_top, clear_top))
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	540 //
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	541 // 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	542 // to target_end.
482 7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	543 const RegionData* const sr = region(split_region);
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	544 const size_t beg_idx =
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	545 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	546 sr->partial_obj_size()));
696 f18338cf04b0 6810474: par compact - crash in summary_phase with very full heap jcoomes parents: 628 diff changeset	547 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	548
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	549 if (TraceParallelOldGCSummaryPhase) {
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	550 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	551 SIZE_FORMAT ", " SIZE_FORMAT ")",
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	552 beg_idx, end_idx);
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	553 }
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	554 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	555 _region_data[idx].set_source_region(0);
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	556 }
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 // 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	559 split_destination = sr->destination();
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	560 partial_obj_size = sr->partial_obj_size();
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
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	563 // 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	564 if (partial_obj_size != 0) {
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	565 _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	566 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	567 }
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	568
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	569 // Setup the continuation addresses.
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	570 *target_next = split_destination + partial_obj_size;
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	571 HeapWord* const source_next = region_to_addr(split_region) + partial_obj_size;
0 a61af66fc99e Initial load duke parents: diff changeset	572
a61af66fc99e Initial load duke parents: diff changeset	573 if (TraceParallelOldGCSummaryPhase) {
482 7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	574 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	575 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	576 " pos=" SIZE_FORMAT,
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	577 split_type, source_next, split_region,
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	578 partial_obj_size);
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	579 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	580 " tn=" PTR_FORMAT,
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	581 split_type, split_destination,
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	582 addr_to_region_idx(split_destination),
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	583 *target_next);
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 if (partial_obj_size != 0) {
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	586 HeapWord* const po_beg = split_info.destination();
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	587 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	588 gclog_or_tty->print_cr("%s split: "
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	589 "po_beg=" PTR_FORMAT " " SIZE_FORMAT " "
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	590 "po_end=" PTR_FORMAT " " SIZE_FORMAT,
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	591 split_type,
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	592 po_beg, addr_to_region_idx(po_beg),
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	593 po_end, addr_to_region_idx(po_end));
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	594 }
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	595 }
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	596
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	597 return source_next;
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 bool ParallelCompactData::summarize(SplitInfo& split_info,
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	601 HeapWord* source_beg, HeapWord* source_end,
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	602 HeapWord** source_next,
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	603 HeapWord* target_beg, HeapWord* target_end,
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	604 HeapWord** target_next)
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	605 {
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	606 if (TraceParallelOldGCSummaryPhase) {
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	607 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	608 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	609 "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	610 source_beg, source_end, source_next_val,
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	611 target_beg, target_end, *target_next);
0 a61af66fc99e Initial load duke parents: diff changeset	612 }
a61af66fc99e Initial load duke parents: diff changeset	613
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	614 size_t cur_region = addr_to_region_idx(source_beg);
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	615 const size_t end_region = addr_to_region_idx(region_align_up(source_end));
0 a61af66fc99e Initial load duke parents: diff changeset	616
a61af66fc99e Initial load duke parents: diff changeset	617 HeapWord *dest_addr = target_beg;
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	618 while (cur_region < end_region) {
482 7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	619 // 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	620 _region_data[cur_region].set_destination(dest_addr);
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	621
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	622 size_t words = _region_data[cur_region].data_size();
0 a61af66fc99e Initial load duke parents: diff changeset	623 if (words > 0) {
482 7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	624 // 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	625 // 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	626 // target space and the rest is copied elsewhere.
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	627 if (dest_addr + words > target_end) {
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	628 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	629 *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	630 target_end, target_next);
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	631 return false;
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	632 }
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	633
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	634 // 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	635 // 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	636 // 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	637 // destination region.
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	638 //
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	639 // 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	640 // 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	641 // 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	642 // available and can be claimed and then filled.
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	643 uint destination_count = 0;
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	644 if (split_info.is_split(cur_region)) {
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	645 // 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	646 // 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	647 // 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	648 // 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	649 // cross a destination region boundary.
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	650 destination_count = split_info.destination_count();
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	651 if (destination_count == 2) {
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	652 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	653 _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	654 }
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	655 }
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	656
0 a61af66fc99e Initial load duke parents: diff changeset	657 HeapWord* const last_addr = dest_addr + words - 1;
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	658 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	659 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	660
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	661 // Initially assume that the destination regions will be the same and
0 a61af66fc99e Initial load duke parents: diff changeset	662 // 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	663 // 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	664 // completely into itself.
482 7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	665 destination_count += cur_region == dest_region_2 ? 0 : 1;
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	666 if (dest_region_1 != dest_region_2) {
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	667 // Destination regions differ; adjust destination_count.
0 a61af66fc99e Initial load duke parents: diff changeset	668 destination_count += 1;
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	669 // 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	670 _region_data[dest_region_2].set_source_region(cur_region);
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	671 } else if (region_offset(dest_addr) == 0) {
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	672 // 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	673 // region.
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	674 _region_data[dest_region_1].set_source_region(cur_region);
0 a61af66fc99e Initial load duke parents: diff changeset	675 }
a61af66fc99e Initial load duke parents: diff changeset	676
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	677 _region_data[cur_region].set_destination_count(destination_count);
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	678 _region_data[cur_region].set_data_location(region_to_addr(cur_region));
0 a61af66fc99e Initial load duke parents: diff changeset	679 dest_addr += words;
a61af66fc99e Initial load duke parents: diff changeset	680 }
a61af66fc99e Initial load duke parents: diff changeset	681
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	682 ++cur_region;
0 a61af66fc99e Initial load duke parents: diff changeset	683 }
a61af66fc99e Initial load duke parents: diff changeset	684
a61af66fc99e Initial load duke parents: diff changeset	685 *target_next = dest_addr;
a61af66fc99e Initial load duke parents: diff changeset	686 return true;
a61af66fc99e Initial load duke parents: diff changeset	687 }
a61af66fc99e Initial load duke parents: diff changeset	688
a61af66fc99e Initial load duke parents: diff changeset	689 HeapWord* ParallelCompactData::calc_new_pointer(HeapWord* addr) {
a61af66fc99e Initial load duke parents: diff changeset	690 assert(addr != NULL, "Should detect NULL oop earlier");
a61af66fc99e Initial load duke parents: diff changeset	691 assert(PSParallelCompact::gc_heap()->is_in(addr), "addr not in heap");
a61af66fc99e Initial load duke parents: diff changeset	692 #ifdef ASSERT
a61af66fc99e Initial load duke parents: diff changeset	693 if (PSParallelCompact::mark_bitmap()->is_unmarked(addr)) {
a61af66fc99e Initial load duke parents: diff changeset	694 gclog_or_tty->print_cr("calc_new_pointer:: addr " PTR_FORMAT, addr);
a61af66fc99e Initial load duke parents: diff changeset	695 }
a61af66fc99e Initial load duke parents: diff changeset	696 #endif
a61af66fc99e Initial load duke parents: diff changeset	697 assert(PSParallelCompact::mark_bitmap()->is_marked(addr), "obj not marked");
a61af66fc99e Initial load duke parents: diff changeset	698
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	699 // Region covering the object.
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	700 size_t region_index = addr_to_region_idx(addr);
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	701 const RegionData* const region_ptr = region(region_index);
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	702 HeapWord* const region_addr = region_align_down(addr);
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	703
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	704 assert(addr < region_addr + RegionSize, "Region does not cover object");
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	705 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	706
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	707 HeapWord* result = region_ptr->destination();
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	708
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	709 // 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	710 // 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	711 // object in the region.
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	712 if (region_ptr->data_size() == RegionSize) {
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	713 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	714 DEBUG_ONLY(PSParallelCompact::check_new_location(addr, result);)
0 a61af66fc99e Initial load duke parents: diff changeset	715 return result;
a61af66fc99e Initial load duke parents: diff changeset	716 }
a61af66fc99e Initial load duke parents: diff changeset	717
a61af66fc99e Initial load duke parents: diff changeset	718 // The new location of the object is
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	719 // region destination +
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	720 // size of the partial object extending onto the region +
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	721 // 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	722 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	723 HeapWord* const search_start = region_addr + partial_obj_size;
0 a61af66fc99e Initial load duke parents: diff changeset	724
a61af66fc99e Initial load duke parents: diff changeset	725 const ParMarkBitMap* bitmap = PSParallelCompact::mark_bitmap();
a61af66fc99e Initial load duke parents: diff changeset	726 size_t live_to_left = bitmap->live_words_in_range(search_start, oop(addr));
a61af66fc99e Initial load duke parents: diff changeset	727
a61af66fc99e Initial load duke parents: diff changeset	728 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	729 DEBUG_ONLY(PSParallelCompact::check_new_location(addr, result);)
0 a61af66fc99e Initial load duke parents: diff changeset	730 return result;
a61af66fc99e Initial load duke parents: diff changeset	731 }
a61af66fc99e Initial load duke parents: diff changeset	732
a61af66fc99e Initial load duke parents: diff changeset	733 klassOop ParallelCompactData::calc_new_klass(klassOop old_klass) {
a61af66fc99e Initial load duke parents: diff changeset	734 klassOop updated_klass;
a61af66fc99e Initial load duke parents: diff changeset	735 if (PSParallelCompact::should_update_klass(old_klass)) {
a61af66fc99e Initial load duke parents: diff changeset	736 updated_klass = (klassOop) calc_new_pointer(old_klass);
a61af66fc99e Initial load duke parents: diff changeset	737 } else {
a61af66fc99e Initial load duke parents: diff changeset	738 updated_klass = old_klass;
a61af66fc99e Initial load duke parents: diff changeset	739 }
a61af66fc99e Initial load duke parents: diff changeset	740
a61af66fc99e Initial load duke parents: diff changeset	741 return updated_klass;
a61af66fc99e Initial load duke parents: diff changeset	742 }
a61af66fc99e Initial load duke parents: diff changeset	743
a61af66fc99e Initial load duke parents: diff changeset	744 #ifdef ASSERT
a61af66fc99e Initial load duke parents: diff changeset	745 void ParallelCompactData::verify_clear(const PSVirtualSpace* vspace)
a61af66fc99e Initial load duke parents: diff changeset	746 {
a61af66fc99e Initial load duke parents: diff changeset	747 const size_t* const beg = (const size_t*)vspace->committed_low_addr();
a61af66fc99e Initial load duke parents: diff changeset	748 const size_t* const end = (const size_t*)vspace->committed_high_addr();
a61af66fc99e Initial load duke parents: diff changeset	749 for (const size_t* p = beg; p < end; ++p) {
a61af66fc99e Initial load duke parents: diff changeset	750 assert(*p == 0, "not zero");
a61af66fc99e Initial load duke parents: diff changeset	751 }
a61af66fc99e Initial load duke parents: diff changeset	752 }
a61af66fc99e Initial load duke parents: diff changeset	753
a61af66fc99e Initial load duke parents: diff changeset	754 void ParallelCompactData::verify_clear()
a61af66fc99e Initial load duke parents: diff changeset	755 {
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	756 verify_clear(_region_vspace);
0 a61af66fc99e Initial load duke parents: diff changeset	757 }
a61af66fc99e Initial load duke parents: diff changeset	758 #endif // #ifdef ASSERT
a61af66fc99e Initial load duke parents: diff changeset	759
a61af66fc99e Initial load duke parents: diff changeset	760 #ifdef NOT_PRODUCT
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	761 ParallelCompactData::RegionData* debug_region(size_t region_index) {
0 a61af66fc99e Initial load duke parents: diff changeset	762 ParallelCompactData& sd = PSParallelCompact::summary_data();
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	763 return sd.region(region_index);
0 a61af66fc99e Initial load duke parents: diff changeset	764 }
a61af66fc99e Initial load duke parents: diff changeset	765 #endif
a61af66fc99e Initial load duke parents: diff changeset	766
a61af66fc99e Initial load duke parents: diff changeset	767 elapsedTimer PSParallelCompact::_accumulated_time;
a61af66fc99e Initial load duke parents: diff changeset	768 unsigned int PSParallelCompact::_total_invocations = 0;
a61af66fc99e Initial load duke parents: diff changeset	769 unsigned int PSParallelCompact::_maximum_compaction_gc_num = 0;
a61af66fc99e Initial load duke parents: diff changeset	770 jlong PSParallelCompact::_time_of_last_gc = 0;
a61af66fc99e Initial load duke parents: diff changeset	771 CollectorCounters* PSParallelCompact::_counters = NULL;
a61af66fc99e Initial load duke parents: diff changeset	772 ParMarkBitMap PSParallelCompact::_mark_bitmap;
a61af66fc99e Initial load duke parents: diff changeset	773 ParallelCompactData PSParallelCompact::_summary_data;
a61af66fc99e Initial load duke parents: diff changeset	774
a61af66fc99e Initial load duke parents: diff changeset	775 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	776
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 79 diff changeset	777 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	778 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	779
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 79 diff changeset	780 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	781 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	782
0 a61af66fc99e Initial load duke parents: diff changeset	783 PSParallelCompact::AdjustPointerClosure PSParallelCompact::_adjust_root_pointer_closure(true);
a61af66fc99e Initial load duke parents: diff changeset	784 PSParallelCompact::AdjustPointerClosure PSParallelCompact::_adjust_pointer_closure(false);
a61af66fc99e Initial load duke parents: diff changeset	785
113 ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 79 diff changeset	786 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	787 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	788
1311 2a1472c30599 4396719: Mark Sweep stack overflow on deeply nested Object arrays jcoomes parents: 997 diff changeset	789 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	790
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 79 diff changeset	791 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	792 void PSParallelCompact::MarkAndPushClosure::do_oop(narrowOop* p) { mark_and_push(_compaction_manager, p); }
0 a61af66fc99e Initial load duke parents: diff changeset	793
a61af66fc99e Initial load duke parents: diff changeset	794 void PSParallelCompact::post_initialize() {
a61af66fc99e Initial load duke parents: diff changeset	795 ParallelScavengeHeap* heap = gc_heap();
a61af66fc99e Initial load duke parents: diff changeset	796 assert(heap->kind() == CollectedHeap::ParallelScavengeHeap, "Sanity");
a61af66fc99e Initial load duke parents: diff changeset	797
a61af66fc99e Initial load duke parents: diff changeset	798 MemRegion mr = heap->reserved_region();
a61af66fc99e Initial load duke parents: diff changeset	799 _ref_processor = ReferenceProcessor::create_ref_processor(
a61af66fc99e Initial load duke parents: diff changeset	800 mr, // span
a61af66fc99e Initial load duke parents: diff changeset	801 true, // atomic_discovery
a61af66fc99e Initial load duke parents: diff changeset	802 true, // mt_discovery
a61af66fc99e Initial load duke parents: diff changeset	803 &_is_alive_closure,
a61af66fc99e Initial load duke parents: diff changeset	804 ParallelGCThreads,
a61af66fc99e Initial load duke parents: diff changeset	805 ParallelRefProcEnabled);
a61af66fc99e Initial load duke parents: diff changeset	806 _counters = new CollectorCounters("PSParallelCompact", 1);
a61af66fc99e Initial load duke parents: diff changeset	807
a61af66fc99e Initial load duke parents: diff changeset	808 // Initialize static fields in ParCompactionManager.
a61af66fc99e Initial load duke parents: diff changeset	809 ParCompactionManager::initialize(mark_bitmap());
a61af66fc99e Initial load duke parents: diff changeset	810 }
a61af66fc99e Initial load duke parents: diff changeset	811
a61af66fc99e Initial load duke parents: diff changeset	812 bool PSParallelCompact::initialize() {
a61af66fc99e Initial load duke parents: diff changeset	813 ParallelScavengeHeap* heap = gc_heap();
a61af66fc99e Initial load duke parents: diff changeset	814 assert(heap->kind() == CollectedHeap::ParallelScavengeHeap, "Sanity");
a61af66fc99e Initial load duke parents: diff changeset	815 MemRegion mr = heap->reserved_region();
a61af66fc99e Initial load duke parents: diff changeset	816
a61af66fc99e Initial load duke parents: diff changeset	817 // Was the old gen get allocated successfully?
a61af66fc99e Initial load duke parents: diff changeset	818 if (!heap->old_gen()->is_allocated()) {
a61af66fc99e Initial load duke parents: diff changeset	819 return false;
a61af66fc99e Initial load duke parents: diff changeset	820 }
a61af66fc99e Initial load duke parents: diff changeset	821
a61af66fc99e Initial load duke parents: diff changeset	822 initialize_space_info();
a61af66fc99e Initial load duke parents: diff changeset	823 initialize_dead_wood_limiter();
a61af66fc99e Initial load duke parents: diff changeset	824
a61af66fc99e Initial load duke parents: diff changeset	825 if (!_mark_bitmap.initialize(mr)) {
a61af66fc99e Initial load duke parents: diff changeset	826 vm_shutdown_during_initialization("Unable to allocate bit map for "
a61af66fc99e Initial load duke parents: diff changeset	827 "parallel garbage collection for the requested heap size.");
a61af66fc99e Initial load duke parents: diff changeset	828 return false;
a61af66fc99e Initial load duke parents: diff changeset	829 }
a61af66fc99e Initial load duke parents: diff changeset	830
a61af66fc99e Initial load duke parents: diff changeset	831 if (!_summary_data.initialize(mr)) {
a61af66fc99e Initial load duke parents: diff changeset	832 vm_shutdown_during_initialization("Unable to allocate tables for "
a61af66fc99e Initial load duke parents: diff changeset	833 "parallel garbage collection for the requested heap size.");
a61af66fc99e Initial load duke parents: diff changeset	834 return false;
a61af66fc99e Initial load duke parents: diff changeset	835 }
a61af66fc99e Initial load duke parents: diff changeset	836
a61af66fc99e Initial load duke parents: diff changeset	837 return true;
a61af66fc99e Initial load duke parents: diff changeset	838 }
a61af66fc99e Initial load duke parents: diff changeset	839
a61af66fc99e Initial load duke parents: diff changeset	840 void PSParallelCompact::initialize_space_info()
a61af66fc99e Initial load duke parents: diff changeset	841 {
a61af66fc99e Initial load duke parents: diff changeset	842 memset(&_space_info, 0, sizeof(_space_info));
a61af66fc99e Initial load duke parents: diff changeset	843
a61af66fc99e Initial load duke parents: diff changeset	844 ParallelScavengeHeap* heap = gc_heap();
a61af66fc99e Initial load duke parents: diff changeset	845 PSYoungGen* young_gen = heap->young_gen();
a61af66fc99e Initial load duke parents: diff changeset	846 MutableSpace* perm_space = heap->perm_gen()->object_space();
a61af66fc99e Initial load duke parents: diff changeset	847
a61af66fc99e Initial load duke parents: diff changeset	848 _space_info[perm_space_id].set_space(perm_space);
a61af66fc99e Initial load duke parents: diff changeset	849 _space_info[old_space_id].set_space(heap->old_gen()->object_space());
a61af66fc99e Initial load duke parents: diff changeset	850 _space_info[eden_space_id].set_space(young_gen->eden_space());
a61af66fc99e Initial load duke parents: diff changeset	851 _space_info[from_space_id].set_space(young_gen->from_space());
a61af66fc99e Initial load duke parents: diff changeset	852 _space_info[to_space_id].set_space(young_gen->to_space());
a61af66fc99e Initial load duke parents: diff changeset	853
a61af66fc99e Initial load duke parents: diff changeset	854 _space_info[perm_space_id].set_start_array(heap->perm_gen()->start_array());
a61af66fc99e Initial load duke parents: diff changeset	855 _space_info[old_space_id].set_start_array(heap->old_gen()->start_array());
a61af66fc99e Initial load duke parents: diff changeset	856
a61af66fc99e Initial load duke parents: diff changeset	857 _space_info[perm_space_id].set_min_dense_prefix(perm_space->top());
a61af66fc99e Initial load duke parents: diff changeset	858 if (TraceParallelOldGCDensePrefix) {
a61af66fc99e Initial load duke parents: diff changeset	859 tty->print_cr("perm min_dense_prefix=" PTR_FORMAT,
a61af66fc99e Initial load duke parents: diff changeset	860 _space_info[perm_space_id].min_dense_prefix());
a61af66fc99e Initial load duke parents: diff changeset	861 }
a61af66fc99e Initial load duke parents: diff changeset	862 }
a61af66fc99e Initial load duke parents: diff changeset	863
a61af66fc99e Initial load duke parents: diff changeset	864 void PSParallelCompact::initialize_dead_wood_limiter()
a61af66fc99e Initial load duke parents: diff changeset	865 {
a61af66fc99e Initial load duke parents: diff changeset	866 const size_t max = 100;
a61af66fc99e Initial load duke parents: diff changeset	867 _dwl_mean = double(MIN2(ParallelOldDeadWoodLimiterMean, max)) / 100.0;
a61af66fc99e Initial load duke parents: diff changeset	868 _dwl_std_dev = double(MIN2(ParallelOldDeadWoodLimiterStdDev, max)) / 100.0;
a61af66fc99e Initial load duke parents: diff changeset	869 _dwl_first_term = 1.0 / (sqrt(2.0 * M_PI) * _dwl_std_dev);
a61af66fc99e Initial load duke parents: diff changeset	870 DEBUG_ONLY(_dwl_initialized = true;)
a61af66fc99e Initial load duke parents: diff changeset	871 _dwl_adjustment = normal_distribution(1.0);
a61af66fc99e Initial load duke parents: diff changeset	872 }
a61af66fc99e Initial load duke parents: diff changeset	873
a61af66fc99e Initial load duke parents: diff changeset	874 // Simple class for storing info about the heap at the start of GC, to be used
a61af66fc99e Initial load duke parents: diff changeset	875 // after GC for comparison/printing.
a61af66fc99e Initial load duke parents: diff changeset	876 class PreGCValues {
a61af66fc99e Initial load duke parents: diff changeset	877 public:
a61af66fc99e Initial load duke parents: diff changeset	878 PreGCValues() { }
a61af66fc99e Initial load duke parents: diff changeset	879 PreGCValues(ParallelScavengeHeap* heap) { fill(heap); }
a61af66fc99e Initial load duke parents: diff changeset	880
a61af66fc99e Initial load duke parents: diff changeset	881 void fill(ParallelScavengeHeap* heap) {
a61af66fc99e Initial load duke parents: diff changeset	882 _heap_used = heap->used();
a61af66fc99e Initial load duke parents: diff changeset	883 _young_gen_used = heap->young_gen()->used_in_bytes();
a61af66fc99e Initial load duke parents: diff changeset	884 _old_gen_used = heap->old_gen()->used_in_bytes();
a61af66fc99e Initial load duke parents: diff changeset	885 _perm_gen_used = heap->perm_gen()->used_in_bytes();
a61af66fc99e Initial load duke parents: diff changeset	886 };
a61af66fc99e Initial load duke parents: diff changeset	887
a61af66fc99e Initial load duke parents: diff changeset	888 size_t heap_used() const { return _heap_used; }
a61af66fc99e Initial load duke parents: diff changeset	889 size_t young_gen_used() const { return _young_gen_used; }
a61af66fc99e Initial load duke parents: diff changeset	890 size_t old_gen_used() const { return _old_gen_used; }
a61af66fc99e Initial load duke parents: diff changeset	891 size_t perm_gen_used() const { return _perm_gen_used; }
a61af66fc99e Initial load duke parents: diff changeset	892
a61af66fc99e Initial load duke parents: diff changeset	893 private:
a61af66fc99e Initial load duke parents: diff changeset	894 size_t _heap_used;
a61af66fc99e Initial load duke parents: diff changeset	895 size_t _young_gen_used;
a61af66fc99e Initial load duke parents: diff changeset	896 size_t _old_gen_used;
a61af66fc99e Initial load duke parents: diff changeset	897 size_t _perm_gen_used;
a61af66fc99e Initial load duke parents: diff changeset	898 };
a61af66fc99e Initial load duke parents: diff changeset	899
a61af66fc99e Initial load duke parents: diff changeset	900 void
a61af66fc99e Initial load duke parents: diff changeset	901 PSParallelCompact::clear_data_covering_space(SpaceId id)
a61af66fc99e Initial load duke parents: diff changeset	902 {
a61af66fc99e Initial load duke parents: diff changeset	903 // At this point, top is the value before GC, new_top() is the value that will
a61af66fc99e Initial load duke parents: diff changeset	904 // be set at the end of GC. The marking bitmap is cleared to top; nothing
a61af66fc99e Initial load duke parents: diff changeset	905 // should be marked above top. The summary data is cleared to the larger of
a61af66fc99e Initial load duke parents: diff changeset	906 // top & new_top.
a61af66fc99e Initial load duke parents: diff changeset	907 MutableSpace* const space = _space_info[id].space();
a61af66fc99e Initial load duke parents: diff changeset	908 HeapWord* const bot = space->bottom();
a61af66fc99e Initial load duke parents: diff changeset	909 HeapWord* const top = space->top();
a61af66fc99e Initial load duke parents: diff changeset	910 HeapWord* const max_top = MAX2(top, _space_info[id].new_top());
a61af66fc99e Initial load duke parents: diff changeset	911
a61af66fc99e Initial load duke parents: diff changeset	912 const idx_t beg_bit = _mark_bitmap.addr_to_bit(bot);
a61af66fc99e Initial load duke parents: diff changeset	913 const idx_t end_bit = BitMap::word_align_up(_mark_bitmap.addr_to_bit(top));
a61af66fc99e Initial load duke parents: diff changeset	914 _mark_bitmap.clear_range(beg_bit, end_bit);
a61af66fc99e Initial load duke parents: diff changeset	915
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	916 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	917 const size_t end_region =
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	918 _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	919 _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	920
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	921 // Clear the data used to 'split' regions.
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	922 SplitInfo& split_info = _space_info[id].split_info();
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	923 if (split_info.is_valid()) {
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	924 split_info.clear();
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	925 }
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	926 DEBUG_ONLY(split_info.verify_clear();)
0 a61af66fc99e Initial load duke parents: diff changeset	927 }
a61af66fc99e Initial load duke parents: diff changeset	928
a61af66fc99e Initial load duke parents: diff changeset	929 void PSParallelCompact::pre_compact(PreGCValues* pre_gc_values)
a61af66fc99e Initial load duke parents: diff changeset	930 {
a61af66fc99e Initial load duke parents: diff changeset	931 // Update the from & to space pointers in space_info, since they are swapped
a61af66fc99e Initial load duke parents: diff changeset	932 // at each young gen gc. Do the update unconditionally (even though a
a61af66fc99e Initial load duke parents: diff changeset	933 // promotion failure does not swap spaces) because an unknown number of minor
a61af66fc99e Initial load duke parents: diff changeset	934 // collections will have swapped the spaces an unknown number of times.
a61af66fc99e Initial load duke parents: diff changeset	935 TraceTime tm("pre compact", print_phases(), true, gclog_or_tty);
a61af66fc99e Initial load duke parents: diff changeset	936 ParallelScavengeHeap* heap = gc_heap();
a61af66fc99e Initial load duke parents: diff changeset	937 _space_info[from_space_id].set_space(heap->young_gen()->from_space());
a61af66fc99e Initial load duke parents: diff changeset	938 _space_info[to_space_id].set_space(heap->young_gen()->to_space());
a61af66fc99e Initial load duke parents: diff changeset	939
a61af66fc99e Initial load duke parents: diff changeset	940 pre_gc_values->fill(heap);
a61af66fc99e Initial load duke parents: diff changeset	941
a61af66fc99e Initial load duke parents: diff changeset	942 ParCompactionManager::reset();
a61af66fc99e Initial load duke parents: diff changeset	943 NOT_PRODUCT(_mark_bitmap.reset_counters());
a61af66fc99e Initial load duke parents: diff changeset	944 DEBUG_ONLY(add_obj_count = add_obj_size = 0;)
a61af66fc99e Initial load duke parents: diff changeset	945 DEBUG_ONLY(mark_bitmap_count = mark_bitmap_size = 0;)
a61af66fc99e Initial load duke parents: diff changeset	946
a61af66fc99e Initial load duke parents: diff changeset	947 // 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	948 heap->increment_total_collections(true);
0 a61af66fc99e Initial load duke parents: diff changeset	949
a61af66fc99e Initial load duke parents: diff changeset	950 // We need to track unique mark sweep invocations as well.
a61af66fc99e Initial load duke parents: diff changeset	951 _total_invocations++;
a61af66fc99e Initial load duke parents: diff changeset	952
a61af66fc99e Initial load duke parents: diff changeset	953 if (PrintHeapAtGC) {
a61af66fc99e Initial load duke parents: diff changeset	954 Universe::print_heap_before_gc();
a61af66fc99e Initial load duke parents: diff changeset	955 }
a61af66fc99e Initial load duke parents: diff changeset	956
a61af66fc99e Initial load duke parents: diff changeset	957 // Fill in TLABs
a61af66fc99e Initial load duke parents: diff changeset	958 heap->accumulate_statistics_all_tlabs();
a61af66fc99e Initial load duke parents: diff changeset	959 heap->ensure_parsability(true); // retire TLABs
a61af66fc99e Initial load duke parents: diff changeset	960
a61af66fc99e Initial load duke parents: diff changeset	961 if (VerifyBeforeGC && heap->total_collections() >= VerifyGCStartAt) {
a61af66fc99e Initial load duke parents: diff changeset	962 HandleMark hm; // Discard invalid handles created during verification
a61af66fc99e Initial load duke parents: diff changeset	963 gclog_or_tty->print(" VerifyBeforeGC:");
a61af66fc99e Initial load duke parents: diff changeset	964 Universe::verify(true);
a61af66fc99e Initial load duke parents: diff changeset	965 }
a61af66fc99e Initial load duke parents: diff changeset	966
a61af66fc99e Initial load duke parents: diff changeset	967 // Verify object start arrays
a61af66fc99e Initial load duke parents: diff changeset	968 if (VerifyObjectStartArray &&
a61af66fc99e Initial load duke parents: diff changeset	969 VerifyBeforeGC) {
a61af66fc99e Initial load duke parents: diff changeset	970 heap->old_gen()->verify_object_start_array();
a61af66fc99e Initial load duke parents: diff changeset	971 heap->perm_gen()->verify_object_start_array();
a61af66fc99e Initial load duke parents: diff changeset	972 }
a61af66fc99e Initial load duke parents: diff changeset	973
a61af66fc99e Initial load duke parents: diff changeset	974 DEBUG_ONLY(mark_bitmap()->verify_clear();)
a61af66fc99e Initial load duke parents: diff changeset	975 DEBUG_ONLY(summary_data().verify_clear();)
210 05712c37c828 6676016: ParallelOldGC leaks memory jcoomes parents: 142 diff changeset	976
05712c37c828 6676016: ParallelOldGC leaks memory jcoomes parents: 142 diff changeset	977 // Have worker threads release resources the next time they run a task.
05712c37c828 6676016: ParallelOldGC leaks memory jcoomes parents: 142 diff changeset	978 gc_task_manager()->release_all_resources();
0 a61af66fc99e Initial load duke parents: diff changeset	979 }
a61af66fc99e Initial load duke parents: diff changeset	980
a61af66fc99e Initial load duke parents: diff changeset	981 void PSParallelCompact::post_compact()
a61af66fc99e Initial load duke parents: diff changeset	982 {
a61af66fc99e Initial load duke parents: diff changeset	983 TraceTime tm("post compact", print_phases(), true, gclog_or_tty);
a61af66fc99e Initial load duke parents: diff changeset	984
a61af66fc99e Initial load duke parents: diff changeset	985 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	986 // Clear the marking bitmap, summary data and split info.
0 a61af66fc99e Initial load duke parents: diff changeset	987 clear_data_covering_space(SpaceId(id));
482 7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	988 // 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	989 _space_info[id].publish_new_top();
0 a61af66fc99e Initial load duke parents: diff changeset	990 }
a61af66fc99e Initial load duke parents: diff changeset	991
a61af66fc99e Initial load duke parents: diff changeset	992 MutableSpace* const eden_space = _space_info[eden_space_id].space();
a61af66fc99e Initial load duke parents: diff changeset	993 MutableSpace* const from_space = _space_info[from_space_id].space();
a61af66fc99e Initial load duke parents: diff changeset	994 MutableSpace* const to_space = _space_info[to_space_id].space();
a61af66fc99e Initial load duke parents: diff changeset	995
a61af66fc99e Initial load duke parents: diff changeset	996 ParallelScavengeHeap* heap = gc_heap();
a61af66fc99e Initial load duke parents: diff changeset	997 bool eden_empty = eden_space->is_empty();
a61af66fc99e Initial load duke parents: diff changeset	998 if (!eden_empty) {
a61af66fc99e Initial load duke parents: diff changeset	999 eden_empty = absorb_live_data_from_eden(heap->size_policy(),
a61af66fc99e Initial load duke parents: diff changeset	1000 heap->young_gen(), heap->old_gen());
a61af66fc99e Initial load duke parents: diff changeset	1001 }
a61af66fc99e Initial load duke parents: diff changeset	1002
a61af66fc99e Initial load duke parents: diff changeset	1003 // Update heap occupancy information which is used as input to the soft ref
a61af66fc99e Initial load duke parents: diff changeset	1004 // clearing policy at the next gc.
a61af66fc99e Initial load duke parents: diff changeset	1005 Universe::update_heap_info_at_gc();
a61af66fc99e Initial load duke parents: diff changeset	1006
a61af66fc99e Initial load duke parents: diff changeset	1007 bool young_gen_empty = eden_empty && from_space->is_empty() &&
a61af66fc99e Initial load duke parents: diff changeset	1008 to_space->is_empty();
a61af66fc99e Initial load duke parents: diff changeset	1009
a61af66fc99e Initial load duke parents: diff changeset	1010 BarrierSet* bs = heap->barrier_set();
a61af66fc99e Initial load duke parents: diff changeset	1011 if (bs->is_a(BarrierSet::ModRef)) {
a61af66fc99e Initial load duke parents: diff changeset	1012 ModRefBarrierSet* modBS = (ModRefBarrierSet*)bs;
a61af66fc99e Initial load duke parents: diff changeset	1013 MemRegion old_mr = heap->old_gen()->reserved();
a61af66fc99e Initial load duke parents: diff changeset	1014 MemRegion perm_mr = heap->perm_gen()->reserved();
a61af66fc99e Initial load duke parents: diff changeset	1015 assert(perm_mr.end() <= old_mr.start(), "Generations out of order");
a61af66fc99e Initial load duke parents: diff changeset	1016
a61af66fc99e Initial load duke parents: diff changeset	1017 if (young_gen_empty) {
a61af66fc99e Initial load duke parents: diff changeset	1018 modBS->clear(MemRegion(perm_mr.start(), old_mr.end()));
a61af66fc99e Initial load duke parents: diff changeset	1019 } else {
a61af66fc99e Initial load duke parents: diff changeset	1020 modBS->invalidate(MemRegion(perm_mr.start(), old_mr.end()));
a61af66fc99e Initial load duke parents: diff changeset	1021 }
a61af66fc99e Initial load duke parents: diff changeset	1022 }
a61af66fc99e Initial load duke parents: diff changeset	1023
a61af66fc99e Initial load duke parents: diff changeset	1024 Threads::gc_epilogue();
a61af66fc99e Initial load duke parents: diff changeset	1025 CodeCache::gc_epilogue();
a61af66fc99e Initial load duke parents: diff changeset	1026
a61af66fc99e Initial load duke parents: diff changeset	1027 COMPILER2_PRESENT(DerivedPointerTable::update_pointers());
a61af66fc99e Initial load duke parents: diff changeset	1028
a61af66fc99e Initial load duke parents: diff changeset	1029 ref_processor()->enqueue_discovered_references(NULL);
a61af66fc99e Initial load duke parents: diff changeset	1030
263 12eea04c8b06 6672698: mangle_unused_area() should not remangle the entire heap at each collection. jmasa parents: 210 diff changeset	1031 if (ZapUnusedHeapArea) {
12eea04c8b06 6672698: mangle_unused_area() should not remangle the entire heap at each collection. jmasa parents: 210 diff changeset	1032 heap->gen_mangle_unused_area();
12eea04c8b06 6672698: mangle_unused_area() should not remangle the entire heap at each collection. jmasa parents: 210 diff changeset	1033 }
12eea04c8b06 6672698: mangle_unused_area() should not remangle the entire heap at each collection. jmasa parents: 210 diff changeset	1034
0 a61af66fc99e Initial load duke parents: diff changeset	1035 // Update time of last GC
a61af66fc99e Initial load duke parents: diff changeset	1036 reset_millis_since_last_gc();
a61af66fc99e Initial load duke parents: diff changeset	1037 }
a61af66fc99e Initial load duke parents: diff changeset	1038
a61af66fc99e Initial load duke parents: diff changeset	1039 HeapWord*
a61af66fc99e Initial load duke parents: diff changeset	1040 PSParallelCompact::compute_dense_prefix_via_density(const SpaceId id,
a61af66fc99e Initial load duke parents: diff changeset	1041 bool maximum_compaction)
a61af66fc99e Initial load duke parents: diff changeset	1042 {
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1043 const size_t region_size = ParallelCompactData::RegionSize;
0 a61af66fc99e Initial load duke parents: diff changeset	1044 const ParallelCompactData& sd = summary_data();
a61af66fc99e Initial load duke parents: diff changeset	1045
a61af66fc99e Initial load duke parents: diff changeset	1046 const MutableSpace* const space = _space_info[id].space();
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1047 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	1048 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	1049 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	1050
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1051 // Skip full regions at the beginning of the space--they are necessarily part
0 a61af66fc99e Initial load duke parents: diff changeset	1052 // of the dense prefix.
a61af66fc99e Initial load duke parents: diff changeset	1053 size_t full_count = 0;
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1054 const RegionData* cp;
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1055 for (cp = beg_cp; cp < end_cp && cp->data_size() == region_size; ++cp) {
0 a61af66fc99e Initial load duke parents: diff changeset	1056 ++full_count;
a61af66fc99e Initial load duke parents: diff changeset	1057 }
a61af66fc99e Initial load duke parents: diff changeset	1058
a61af66fc99e Initial load duke parents: diff changeset	1059 assert(total_invocations() >= _maximum_compaction_gc_num, "sanity");
a61af66fc99e Initial load duke parents: diff changeset	1060 const size_t gcs_since_max = total_invocations() - _maximum_compaction_gc_num;
a61af66fc99e Initial load duke parents: diff changeset	1061 const bool interval_ended = gcs_since_max > HeapMaximumCompactionInterval;
a61af66fc99e Initial load duke parents: diff changeset	1062 if (maximum_compaction \|\| cp == end_cp \|\| interval_ended) {
a61af66fc99e Initial load duke parents: diff changeset	1063 _maximum_compaction_gc_num = total_invocations();
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1064 return sd.region_to_addr(cp);
0 a61af66fc99e Initial load duke parents: diff changeset	1065 }
a61af66fc99e Initial load duke parents: diff changeset	1066
a61af66fc99e Initial load duke parents: diff changeset	1067 HeapWord* const new_top = _space_info[id].new_top();
a61af66fc99e Initial load duke parents: diff changeset	1068 const size_t space_live = pointer_delta(new_top, space->bottom());
a61af66fc99e Initial load duke parents: diff changeset	1069 const size_t space_used = space->used_in_words();
a61af66fc99e Initial load duke parents: diff changeset	1070 const size_t space_capacity = space->capacity_in_words();
a61af66fc99e Initial load duke parents: diff changeset	1071
a61af66fc99e Initial load duke parents: diff changeset	1072 const double cur_density = double(space_live) / space_capacity;
a61af66fc99e Initial load duke parents: diff changeset	1073 const double deadwood_density =
a61af66fc99e Initial load duke parents: diff changeset	1074 (1.0 - cur_density) * (1.0 - cur_density) * cur_density * cur_density;
a61af66fc99e Initial load duke parents: diff changeset	1075 const size_t deadwood_goal = size_t(space_capacity * deadwood_density);
a61af66fc99e Initial load duke parents: diff changeset	1076
a61af66fc99e Initial load duke parents: diff changeset	1077 if (TraceParallelOldGCDensePrefix) {
a61af66fc99e Initial load duke parents: diff changeset	1078 tty->print_cr("cur_dens=%5.3f dw_dens=%5.3f dw_goal=" SIZE_FORMAT,
a61af66fc99e Initial load duke parents: diff changeset	1079 cur_density, deadwood_density, deadwood_goal);
a61af66fc99e Initial load duke parents: diff changeset	1080 tty->print_cr("space_live=" SIZE_FORMAT " " "space_used=" SIZE_FORMAT " "
a61af66fc99e Initial load duke parents: diff changeset	1081 "space_cap=" SIZE_FORMAT,
a61af66fc99e Initial load duke parents: diff changeset	1082 space_live, space_used,
a61af66fc99e Initial load duke parents: diff changeset	1083 space_capacity);
a61af66fc99e Initial load duke parents: diff changeset	1084 }
a61af66fc99e Initial load duke parents: diff changeset	1085
a61af66fc99e Initial load duke parents: diff changeset	1086 // XXX - Use binary search?
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1087 HeapWord* dense_prefix = sd.region_to_addr(cp);
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1088 const RegionData* full_cp = cp;
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1089 const RegionData* const top_cp = sd.addr_to_region_ptr(space->top() - 1);
0 a61af66fc99e Initial load duke parents: diff changeset	1090 while (cp < end_cp) {
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1091 HeapWord* region_destination = cp->destination();
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1092 const size_t cur_deadwood = pointer_delta(dense_prefix, region_destination);
0 a61af66fc99e Initial load duke parents: diff changeset	1093 if (TraceParallelOldGCDensePrefix && Verbose) {
264 15dd2594d08e 6718283: existing uses of _FORMAT_W() were broken by 6521491 jcoomes* parents: 263 diff changeset	1094 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	1095 "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	1096 sd.region(cp), region_destination,
0 a61af66fc99e Initial load duke parents: diff changeset	1097 dense_prefix, cur_deadwood);
a61af66fc99e Initial load duke parents: diff changeset	1098 }
a61af66fc99e Initial load duke parents: diff changeset	1099
a61af66fc99e Initial load duke parents: diff changeset	1100 if (cur_deadwood >= deadwood_goal) {
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1101 // 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	1102 // 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	1103 // iterate backwards over those sparse regions, looking for the region
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1104 // 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	1105 size_t space_to_left = sd.region(cp) * region_size;
0 a61af66fc99e Initial load duke parents: diff changeset	1106 size_t live_to_left = space_to_left - cur_deadwood;
a61af66fc99e Initial load duke parents: diff changeset	1107 size_t space_to_right = space_capacity - space_to_left;
a61af66fc99e Initial load duke parents: diff changeset	1108 size_t live_to_right = space_live - live_to_left;
a61af66fc99e Initial load duke parents: diff changeset	1109 double density_to_right = double(live_to_right) / space_to_right;
a61af66fc99e Initial load duke parents: diff changeset	1110 while (cp > full_cp) {
a61af66fc99e Initial load duke parents: diff changeset	1111 --cp;
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1112 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	1113 cp->data_size();
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1114 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	1115 double prev_region_density_to_right =
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1116 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	1117 if (density_to_right <= prev_region_density_to_right) {
0 a61af66fc99e Initial load duke parents: diff changeset	1118 return dense_prefix;
a61af66fc99e Initial load duke parents: diff changeset	1119 }
a61af66fc99e Initial load duke parents: diff changeset	1120 if (TraceParallelOldGCDensePrefix && Verbose) {
264 15dd2594d08e 6718283: existing uses of _FORMAT_W() were broken by 6521491 jcoomes* parents: 263 diff changeset	1121 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	1122 "pc_d2r=%10.8f", sd.region(cp), density_to_right,
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1123 prev_region_density_to_right);
0 a61af66fc99e Initial load duke parents: diff changeset	1124 }
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1125 dense_prefix -= region_size;
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1126 live_to_right = prev_region_live_to_right;
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1127 space_to_right = prev_region_space_to_right;
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1128 density_to_right = prev_region_density_to_right;
0 a61af66fc99e Initial load duke parents: diff changeset	1129 }
a61af66fc99e Initial load duke parents: diff changeset	1130 return dense_prefix;
a61af66fc99e Initial load duke parents: diff changeset	1131 }
a61af66fc99e Initial load duke parents: diff changeset	1132
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1133 dense_prefix += region_size;
0 a61af66fc99e Initial load duke parents: diff changeset	1134 ++cp;
a61af66fc99e Initial load duke parents: diff changeset	1135 }
a61af66fc99e Initial load duke parents: diff changeset	1136
a61af66fc99e Initial load duke parents: diff changeset	1137 return dense_prefix;
a61af66fc99e Initial load duke parents: diff changeset	1138 }
a61af66fc99e Initial load duke parents: diff changeset	1139
a61af66fc99e Initial load duke parents: diff changeset	1140 #ifndef PRODUCT
a61af66fc99e Initial load duke parents: diff changeset	1141 void PSParallelCompact::print_dense_prefix_stats(const char* const algorithm,
a61af66fc99e Initial load duke parents: diff changeset	1142 const SpaceId id,
a61af66fc99e Initial load duke parents: diff changeset	1143 const bool maximum_compaction,
a61af66fc99e Initial load duke parents: diff changeset	1144 HeapWord* const addr)
a61af66fc99e Initial load duke parents: diff changeset	1145 {
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1146 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	1147 RegionData* const cp = summary_data().region(region_idx);
0 a61af66fc99e Initial load duke parents: diff changeset	1148 const MutableSpace* const space = _space_info[id].space();
a61af66fc99e Initial load duke parents: diff changeset	1149 HeapWord* const new_top = _space_info[id].new_top();
a61af66fc99e Initial load duke parents: diff changeset	1150
a61af66fc99e Initial load duke parents: diff changeset	1151 const size_t space_live = pointer_delta(new_top, space->bottom());
a61af66fc99e Initial load duke parents: diff changeset	1152 const size_t dead_to_left = pointer_delta(addr, cp->destination());
a61af66fc99e Initial load duke parents: diff changeset	1153 const size_t space_cap = space->capacity_in_words();
a61af66fc99e Initial load duke parents: diff changeset	1154 const double dead_to_left_pct = double(dead_to_left) / space_cap;
a61af66fc99e Initial load duke parents: diff changeset	1155 const size_t live_to_right = new_top - cp->destination();
a61af66fc99e Initial load duke parents: diff changeset	1156 const size_t dead_to_right = space->top() - addr - live_to_right;
a61af66fc99e Initial load duke parents: diff changeset	1157
264 15dd2594d08e 6718283: existing uses of _FORMAT_W() were broken by 6521491 jcoomes* parents: 263 diff changeset	1158 tty->print_cr("%s=" PTR_FORMAT " dpc=" SIZE_FORMAT_W(5) " "
0 a61af66fc99e Initial load duke parents: diff changeset	1159 "spl=" SIZE_FORMAT " "
a61af66fc99e Initial load duke parents: diff changeset	1160 "d2l=" SIZE_FORMAT " d2l%%=%6.4f "
a61af66fc99e Initial load duke parents: diff changeset	1161 "d2r=" SIZE_FORMAT " l2r=" SIZE_FORMAT
a61af66fc99e Initial load duke parents: diff changeset	1162 " ratio=%10.8f",
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1163 algorithm, addr, region_idx,
0 a61af66fc99e Initial load duke parents: diff changeset	1164 space_live,
a61af66fc99e Initial load duke parents: diff changeset	1165 dead_to_left, dead_to_left_pct,
a61af66fc99e Initial load duke parents: diff changeset	1166 dead_to_right, live_to_right,
a61af66fc99e Initial load duke parents: diff changeset	1167 double(dead_to_right) / live_to_right);
a61af66fc99e Initial load duke parents: diff changeset	1168 }
a61af66fc99e Initial load duke parents: diff changeset	1169 #endif // #ifndef PRODUCT
a61af66fc99e Initial load duke parents: diff changeset	1170
a61af66fc99e Initial load duke parents: diff changeset	1171 // Return a fraction indicating how much of the generation can be treated as
a61af66fc99e Initial load duke parents: diff changeset	1172 // "dead wood" (i.e., not reclaimed). The function uses a normal distribution
a61af66fc99e Initial load duke parents: diff changeset	1173 // based on the density of live objects in the generation to determine a limit,
a61af66fc99e Initial load duke parents: diff changeset	1174 // which is then adjusted so the return value is min_percent when the density is
a61af66fc99e Initial load duke parents: diff changeset	1175 // 1.
a61af66fc99e Initial load duke parents: diff changeset	1176 //
a61af66fc99e Initial load duke parents: diff changeset	1177 // The following table shows some return values for a different values of the
a61af66fc99e Initial load duke parents: diff changeset	1178 // standard deviation (ParallelOldDeadWoodLimiterStdDev); the mean is 0.5 and
a61af66fc99e Initial load duke parents: diff changeset	1179 // min_percent is 1.
a61af66fc99e Initial load duke parents: diff changeset	1180 //
a61af66fc99e Initial load duke parents: diff changeset	1181 // fraction allowed as dead wood
a61af66fc99e Initial load duke parents: diff changeset	1182 // -----------------------------------------------------------------
a61af66fc99e Initial load duke parents: diff changeset	1183 // 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	1184 // ------- ---------- ---------- ---------- ---------- ---------- ----------
a61af66fc99e Initial load duke parents: diff changeset	1185 // 0.00000 0.01000000 0.01000000 0.01000000 0.01000000 0.01000000 0.01000000
a61af66fc99e Initial load duke parents: diff changeset	1186 // 0.05000 0.03193096 0.02836880 0.02550828 0.02319280 0.02130337 0.01974941
a61af66fc99e Initial load duke parents: diff changeset	1187 // 0.10000 0.05247504 0.04547452 0.03988045 0.03537016 0.03170171 0.02869272
a61af66fc99e Initial load duke parents: diff changeset	1188 // 0.15000 0.07135702 0.06111390 0.05296419 0.04641639 0.04110601 0.03676066
a61af66fc99e Initial load duke parents: diff changeset	1189 // 0.20000 0.08831616 0.07509618 0.06461766 0.05622444 0.04943437 0.04388975
a61af66fc99e Initial load duke parents: diff changeset	1190 // 0.25000 0.10311208 0.08724696 0.07471205 0.06469760 0.05661313 0.05002313
a61af66fc99e Initial load duke parents: diff changeset	1191 // 0.30000 0.11553050 0.09741183 0.08313394 0.07175114 0.06257797 0.05511132
a61af66fc99e Initial load duke parents: diff changeset	1192 // 0.35000 0.12538832 0.10545958 0.08978741 0.07731366 0.06727491 0.05911289
a61af66fc99e Initial load duke parents: diff changeset	1193 // 0.40000 0.13253818 0.11128511 0.09459590 0.08132834 0.07066107 0.06199500
a61af66fc99e Initial load duke parents: diff changeset	1194 // 0.45000 0.13687208 0.11481163 0.09750361 0.08375387 0.07270534 0.06373386
a61af66fc99e Initial load duke parents: diff changeset	1195 // 0.50000 0.13832410 0.11599237 0.09847664 0.08456518 0.07338887 0.06431510
a61af66fc99e Initial load duke parents: diff changeset	1196 // 0.55000 0.13687208 0.11481163 0.09750361 0.08375387 0.07270534 0.06373386
a61af66fc99e Initial load duke parents: diff changeset	1197 // 0.60000 0.13253818 0.11128511 0.09459590 0.08132834 0.07066107 0.06199500
a61af66fc99e Initial load duke parents: diff changeset	1198 // 0.65000 0.12538832 0.10545958 0.08978741 0.07731366 0.06727491 0.05911289
a61af66fc99e Initial load duke parents: diff changeset	1199 // 0.70000 0.11553050 0.09741183 0.08313394 0.07175114 0.06257797 0.05511132
a61af66fc99e Initial load duke parents: diff changeset	1200 // 0.75000 0.10311208 0.08724696 0.07471205 0.06469760 0.05661313 0.05002313
a61af66fc99e Initial load duke parents: diff changeset	1201 // 0.80000 0.08831616 0.07509618 0.06461766 0.05622444 0.04943437 0.04388975
a61af66fc99e Initial load duke parents: diff changeset	1202 // 0.85000 0.07135702 0.06111390 0.05296419 0.04641639 0.04110601 0.03676066
a61af66fc99e Initial load duke parents: diff changeset	1203 // 0.90000 0.05247504 0.04547452 0.03988045 0.03537016 0.03170171 0.02869272
a61af66fc99e Initial load duke parents: diff changeset	1204 // 0.95000 0.03193096 0.02836880 0.02550828 0.02319280 0.02130337 0.01974941
a61af66fc99e Initial load duke parents: diff changeset	1205 // 1.00000 0.01000000 0.01000000 0.01000000 0.01000000 0.01000000 0.01000000
a61af66fc99e Initial load duke parents: diff changeset	1206
a61af66fc99e Initial load duke parents: diff changeset	1207 double PSParallelCompact::dead_wood_limiter(double density, size_t min_percent)
a61af66fc99e Initial load duke parents: diff changeset	1208 {
a61af66fc99e Initial load duke parents: diff changeset	1209 assert(_dwl_initialized, "uninitialized");
a61af66fc99e Initial load duke parents: diff changeset	1210
a61af66fc99e Initial load duke parents: diff changeset	1211 // The raw limit is the value of the normal distribution at x = density.
a61af66fc99e Initial load duke parents: diff changeset	1212 const double raw_limit = normal_distribution(density);
a61af66fc99e Initial load duke parents: diff changeset	1213
a61af66fc99e Initial load duke parents: diff changeset	1214 // Adjust the raw limit so it becomes the minimum when the density is 1.
a61af66fc99e Initial load duke parents: diff changeset	1215 //
a61af66fc99e Initial load duke parents: diff changeset	1216 // First subtract the adjustment value (which is simply the precomputed value
a61af66fc99e Initial load duke parents: diff changeset	1217 // normal_distribution(1.0)); this yields a value of 0 when the density is 1.
a61af66fc99e Initial load duke parents: diff changeset	1218 // Then add the minimum value, so the minimum is returned when the density is
a61af66fc99e Initial load duke parents: diff changeset	1219 // 1. Finally, prevent negative values, which occur when the mean is not 0.5.
a61af66fc99e Initial load duke parents: diff changeset	1220 const double min = double(min_percent) / 100.0;
a61af66fc99e Initial load duke parents: diff changeset	1221 const double limit = raw_limit - _dwl_adjustment + min;
a61af66fc99e Initial load duke parents: diff changeset	1222 return MAX2(limit, 0.0);
a61af66fc99e Initial load duke parents: diff changeset	1223 }
a61af66fc99e Initial load duke parents: diff changeset	1224
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1225 ParallelCompactData::RegionData*
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1226 PSParallelCompact::first_dead_space_region(const RegionData* beg,
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1227 const RegionData* end)
0 a61af66fc99e Initial load duke parents: diff changeset	1228 {
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1229 const size_t region_size = ParallelCompactData::RegionSize;
0 a61af66fc99e Initial load duke parents: diff changeset	1230 ParallelCompactData& sd = summary_data();
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1231 size_t left = sd.region(beg);
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1232 size_t right = end > beg ? sd.region(end) - 1 : left;
0 a61af66fc99e Initial load duke parents: diff changeset	1233
a61af66fc99e Initial load duke parents: diff changeset	1234 // Binary search.
a61af66fc99e Initial load duke parents: diff changeset	1235 while (left < right) {
a61af66fc99e Initial load duke parents: diff changeset	1236 // Equivalent to (left + right) / 2, but does not overflow.
a61af66fc99e Initial load duke parents: diff changeset	1237 const size_t middle = left + (right - left) / 2;
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1238 RegionData* const middle_ptr = sd.region(middle);
0 a61af66fc99e Initial load duke parents: diff changeset	1239 HeapWord* const dest = middle_ptr->destination();
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1240 HeapWord* const addr = sd.region_to_addr(middle);
0 a61af66fc99e Initial load duke parents: diff changeset	1241 assert(dest != NULL, "sanity");
a61af66fc99e Initial load duke parents: diff changeset	1242 assert(dest <= addr, "must move left");
a61af66fc99e Initial load duke parents: diff changeset	1243
a61af66fc99e Initial load duke parents: diff changeset	1244 if (middle > left && dest < addr) {
a61af66fc99e Initial load duke parents: diff changeset	1245 right = middle - 1;
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1246 } else if (middle < right && middle_ptr->data_size() == region_size) {
0 a61af66fc99e Initial load duke parents: diff changeset	1247 left = middle + 1;
a61af66fc99e Initial load duke parents: diff changeset	1248 } else {
a61af66fc99e Initial load duke parents: diff changeset	1249 return middle_ptr;
a61af66fc99e Initial load duke parents: diff changeset	1250 }
a61af66fc99e Initial load duke parents: diff changeset	1251 }
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1252 return sd.region(left);
0 a61af66fc99e Initial load duke parents: diff changeset	1253 }
a61af66fc99e Initial load duke parents: diff changeset	1254
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1255 ParallelCompactData::RegionData*
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1256 PSParallelCompact::dead_wood_limit_region(const RegionData* beg,
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1257 const RegionData* end,
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1258 size_t dead_words)
0 a61af66fc99e Initial load duke parents: diff changeset	1259 {
a61af66fc99e Initial load duke parents: diff changeset	1260 ParallelCompactData& sd = summary_data();
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1261 size_t left = sd.region(beg);
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1262 size_t right = end > beg ? sd.region(end) - 1 : left;
0 a61af66fc99e Initial load duke parents: diff changeset	1263
a61af66fc99e Initial load duke parents: diff changeset	1264 // Binary search.
a61af66fc99e Initial load duke parents: diff changeset	1265 while (left < right) {
a61af66fc99e Initial load duke parents: diff changeset	1266 // Equivalent to (left + right) / 2, but does not overflow.
a61af66fc99e Initial load duke parents: diff changeset	1267 const size_t middle = left + (right - left) / 2;
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1268 RegionData* const middle_ptr = sd.region(middle);
0 a61af66fc99e Initial load duke parents: diff changeset	1269 HeapWord* const dest = middle_ptr->destination();
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1270 HeapWord* const addr = sd.region_to_addr(middle);
0 a61af66fc99e Initial load duke parents: diff changeset	1271 assert(dest != NULL, "sanity");
a61af66fc99e Initial load duke parents: diff changeset	1272 assert(dest <= addr, "must move left");
a61af66fc99e Initial load duke parents: diff changeset	1273
a61af66fc99e Initial load duke parents: diff changeset	1274 const size_t dead_to_left = pointer_delta(addr, dest);
a61af66fc99e Initial load duke parents: diff changeset	1275 if (middle > left && dead_to_left > dead_words) {
a61af66fc99e Initial load duke parents: diff changeset	1276 right = middle - 1;
a61af66fc99e Initial load duke parents: diff changeset	1277 } else if (middle < right && dead_to_left < dead_words) {
a61af66fc99e Initial load duke parents: diff changeset	1278 left = middle + 1;
a61af66fc99e Initial load duke parents: diff changeset	1279 } else {
a61af66fc99e Initial load duke parents: diff changeset	1280 return middle_ptr;
a61af66fc99e Initial load duke parents: diff changeset	1281 }
a61af66fc99e Initial load duke parents: diff changeset	1282 }
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1283 return sd.region(left);
0 a61af66fc99e Initial load duke parents: diff changeset	1284 }
a61af66fc99e Initial load duke parents: diff changeset	1285
a61af66fc99e Initial load duke parents: diff changeset	1286 // The result is valid during the summary phase, after the initial summarization
a61af66fc99e Initial load duke parents: diff changeset	1287 // of each space into itself, and before final summarization.
a61af66fc99e Initial load duke parents: diff changeset	1288 inline double
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1289 PSParallelCompact::reclaimed_ratio(const RegionData* const cp,
0 a61af66fc99e Initial load duke parents: diff changeset	1290 HeapWord* const bottom,
a61af66fc99e Initial load duke parents: diff changeset	1291 HeapWord* const top,
a61af66fc99e Initial load duke parents: diff changeset	1292 HeapWord* const new_top)
a61af66fc99e Initial load duke parents: diff changeset	1293 {
a61af66fc99e Initial load duke parents: diff changeset	1294 ParallelCompactData& sd = summary_data();
a61af66fc99e Initial load duke parents: diff changeset	1295
a61af66fc99e Initial load duke parents: diff changeset	1296 assert(cp != NULL, "sanity");
a61af66fc99e Initial load duke parents: diff changeset	1297 assert(bottom != NULL, "sanity");
a61af66fc99e Initial load duke parents: diff changeset	1298 assert(top != NULL, "sanity");
a61af66fc99e Initial load duke parents: diff changeset	1299 assert(new_top != NULL, "sanity");
a61af66fc99e Initial load duke parents: diff changeset	1300 assert(top >= new_top, "summary data problem?");
a61af66fc99e Initial load duke parents: diff changeset	1301 assert(new_top > bottom, "space is empty; should not be here");
a61af66fc99e Initial load duke parents: diff changeset	1302 assert(new_top >= cp->destination(), "sanity");
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1303 assert(top >= sd.region_to_addr(cp), "sanity");
0 a61af66fc99e Initial load duke parents: diff changeset	1304
a61af66fc99e Initial load duke parents: diff changeset	1305 HeapWord* const destination = cp->destination();
a61af66fc99e Initial load duke parents: diff changeset	1306 const size_t dense_prefix_live = pointer_delta(destination, bottom);
a61af66fc99e Initial load duke parents: diff changeset	1307 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	1308 const size_t compacted_region_used = pointer_delta(top,
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1309 sd.region_to_addr(cp));
0 a61af66fc99e Initial load duke parents: diff changeset	1310 const size_t reclaimable = compacted_region_used - compacted_region_live;
a61af66fc99e Initial load duke parents: diff changeset	1311
a61af66fc99e Initial load duke parents: diff changeset	1312 const double divisor = dense_prefix_live + 1.25 * compacted_region_live;
a61af66fc99e Initial load duke parents: diff changeset	1313 return double(reclaimable) / divisor;
a61af66fc99e Initial load duke parents: diff changeset	1314 }
a61af66fc99e Initial load duke parents: diff changeset	1315
a61af66fc99e Initial load duke parents: diff changeset	1316 // 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	1317 // compacted region. The address is always on a region boundary.
0 a61af66fc99e Initial load duke parents: diff changeset	1318 //
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1319 // 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	1320 // 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	1321 // 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	1322 // 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	1323 // 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	1324 // 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	1325 // (maximum) reclaimed_ratio() is selected.
0 a61af66fc99e Initial load duke parents: diff changeset	1326 HeapWord*
a61af66fc99e Initial load duke parents: diff changeset	1327 PSParallelCompact::compute_dense_prefix(const SpaceId id,
a61af66fc99e Initial load duke parents: diff changeset	1328 bool maximum_compaction)
a61af66fc99e Initial load duke parents: diff changeset	1329 {
483 0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1330 if (ParallelOldGCSplitALot) {
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1331 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	1332 // 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	1333 return _space_info[id].dense_prefix();
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1334 }
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1335 }
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1336
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1337 const size_t region_size = ParallelCompactData::RegionSize;
0 a61af66fc99e Initial load duke parents: diff changeset	1338 const ParallelCompactData& sd = summary_data();
a61af66fc99e Initial load duke parents: diff changeset	1339
a61af66fc99e Initial load duke parents: diff changeset	1340 const MutableSpace* const space = _space_info[id].space();
a61af66fc99e Initial load duke parents: diff changeset	1341 HeapWord* const top = space->top();
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1342 HeapWord* const top_aligned_up = sd.region_align_up(top);
0 a61af66fc99e Initial load duke parents: diff changeset	1343 HeapWord* const new_top = _space_info[id].new_top();
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1344 HeapWord* const new_top_aligned_up = sd.region_align_up(new_top);
0 a61af66fc99e Initial load duke parents: diff changeset	1345 HeapWord* const bottom = space->bottom();
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1346 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	1347 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	1348 const RegionData* const new_top_cp =
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1349 sd.addr_to_region_ptr(new_top_aligned_up);
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1350
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1351 // Skip full regions at the beginning of the space--they are necessarily part
0 a61af66fc99e Initial load duke parents: diff changeset	1352 // of the dense prefix.
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1353 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	1354 assert(full_cp->destination() == sd.region_to_addr(full_cp) \|\|
0 a61af66fc99e Initial load duke parents: diff changeset	1355 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	1356 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	1357 "region must have dead space");
0 a61af66fc99e Initial load duke parents: diff changeset	1358
a61af66fc99e Initial load duke parents: diff changeset	1359 // The gc number is saved whenever a maximum compaction is done, and used to
a61af66fc99e Initial load duke parents: diff changeset	1360 // determine when the maximum compaction interval has expired. This avoids
a61af66fc99e Initial load duke parents: diff changeset	1361 // successive max compactions for different reasons.
a61af66fc99e Initial load duke parents: diff changeset	1362 assert(total_invocations() >= _maximum_compaction_gc_num, "sanity");
a61af66fc99e Initial load duke parents: diff changeset	1363 const size_t gcs_since_max = total_invocations() - _maximum_compaction_gc_num;
a61af66fc99e Initial load duke parents: diff changeset	1364 const bool interval_ended = gcs_since_max > HeapMaximumCompactionInterval \|\|
a61af66fc99e Initial load duke parents: diff changeset	1365 total_invocations() == HeapFirstMaximumCompactionCount;
a61af66fc99e Initial load duke parents: diff changeset	1366 if (maximum_compaction \|\| full_cp == top_cp \|\| interval_ended) {
a61af66fc99e Initial load duke parents: diff changeset	1367 _maximum_compaction_gc_num = total_invocations();
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1368 return sd.region_to_addr(full_cp);
0 a61af66fc99e Initial load duke parents: diff changeset	1369 }
a61af66fc99e Initial load duke parents: diff changeset	1370
a61af66fc99e Initial load duke parents: diff changeset	1371 const size_t space_live = pointer_delta(new_top, bottom);
a61af66fc99e Initial load duke parents: diff changeset	1372 const size_t space_used = space->used_in_words();
a61af66fc99e Initial load duke parents: diff changeset	1373 const size_t space_capacity = space->capacity_in_words();
a61af66fc99e Initial load duke parents: diff changeset	1374
a61af66fc99e Initial load duke parents: diff changeset	1375 const double density = double(space_live) / double(space_capacity);
a61af66fc99e Initial load duke parents: diff changeset	1376 const size_t min_percent_free =
a61af66fc99e Initial load duke parents: diff changeset	1377 id == perm_space_id ? PermMarkSweepDeadRatio : MarkSweepDeadRatio;
a61af66fc99e Initial load duke parents: diff changeset	1378 const double limiter = dead_wood_limiter(density, min_percent_free);
a61af66fc99e Initial load duke parents: diff changeset	1379 const size_t dead_wood_max = space_used - space_live;
a61af66fc99e Initial load duke parents: diff changeset	1380 const size_t dead_wood_limit = MIN2(size_t(space_capacity * limiter),
a61af66fc99e Initial load duke parents: diff changeset	1381 dead_wood_max);
a61af66fc99e Initial load duke parents: diff changeset	1382
a61af66fc99e Initial load duke parents: diff changeset	1383 if (TraceParallelOldGCDensePrefix) {
a61af66fc99e Initial load duke parents: diff changeset	1384 tty->print_cr("space_live=" SIZE_FORMAT " " "space_used=" SIZE_FORMAT " "
a61af66fc99e Initial load duke parents: diff changeset	1385 "space_cap=" SIZE_FORMAT,
a61af66fc99e Initial load duke parents: diff changeset	1386 space_live, space_used,
a61af66fc99e Initial load duke parents: diff changeset	1387 space_capacity);
a61af66fc99e Initial load duke parents: diff changeset	1388 tty->print_cr("dead_wood_limiter(%6.4f, %d)=%6.4f "
a61af66fc99e Initial load duke parents: diff changeset	1389 "dead_wood_max=" SIZE_FORMAT " dead_wood_limit=" SIZE_FORMAT,
a61af66fc99e Initial load duke parents: diff changeset	1390 density, min_percent_free, limiter,
a61af66fc99e Initial load duke parents: diff changeset	1391 dead_wood_max, dead_wood_limit);
a61af66fc99e Initial load duke parents: diff changeset	1392 }
a61af66fc99e Initial load duke parents: diff changeset	1393
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1394 // 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	1395 const RegionData* const limit_cp =
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1396 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	1397
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1398 // Scan from the first region with dead space to the limit region and find the
0 a61af66fc99e Initial load duke parents: diff changeset	1399 // one with the best (largest) reclaimed ratio.
a61af66fc99e Initial load duke parents: diff changeset	1400 double best_ratio = 0.0;
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1401 const RegionData* best_cp = full_cp;
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1402 for (const RegionData* cp = full_cp; cp < limit_cp; ++cp) {
0 a61af66fc99e Initial load duke parents: diff changeset	1403 double tmp_ratio = reclaimed_ratio(cp, bottom, top, new_top);
a61af66fc99e Initial load duke parents: diff changeset	1404 if (tmp_ratio > best_ratio) {
a61af66fc99e Initial load duke parents: diff changeset	1405 best_cp = cp;
a61af66fc99e Initial load duke parents: diff changeset	1406 best_ratio = tmp_ratio;
a61af66fc99e Initial load duke parents: diff changeset	1407 }
a61af66fc99e Initial load duke parents: diff changeset	1408 }
a61af66fc99e Initial load duke parents: diff changeset	1409
a61af66fc99e Initial load duke parents: diff changeset	1410 #if 0
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1411 // 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	1412 // 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	1413 // ("first-free"). The first-free region is usually near the start of the
0 a61af66fc99e Initial load duke parents: diff changeset	1414 // heap, which means we are copying most of the heap already, so copy a bit
a61af66fc99e Initial load duke parents: diff changeset	1415 // more to get complete compaction.
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1416 if (pointer_delta(best_cp, full_cp, sizeof(RegionData)) < 4) {
0 a61af66fc99e Initial load duke parents: diff changeset	1417 _maximum_compaction_gc_num = total_invocations();
a61af66fc99e Initial load duke parents: diff changeset	1418 best_cp = full_cp;
a61af66fc99e Initial load duke parents: diff changeset	1419 }
a61af66fc99e Initial load duke parents: diff changeset	1420 #endif // #if 0
a61af66fc99e Initial load duke parents: diff changeset	1421
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1422 return sd.region_to_addr(best_cp);
0 a61af66fc99e Initial load duke parents: diff changeset	1423 }
a61af66fc99e Initial load duke parents: diff changeset	1424
483 0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1425 #ifndef PRODUCT
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1426 void
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1427 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	1428 size_t words)
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1429 {
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1430 if (TraceParallelOldGCSummaryPhase) {
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1431 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	1432 SIZE_FORMAT, start, start + words, words);
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1433 }
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1434
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1435 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	1436 CollectedHeap::fill_with_objects(start, words);
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1437 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	1438 _mark_bitmap.mark_obj(p, words);
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1439 _summary_data.add_obj(p, words);
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1440 start_array->allocate_block(p);
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1441 }
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1442 }
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1443
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1444 void
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1445 PSParallelCompact::summarize_new_objects(SpaceId id, HeapWord* start)
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1446 {
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1447 ParallelCompactData& sd = summary_data();
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1448 MutableSpace* space = _space_info[id].space();
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1449
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1450 // Find the source and destination start addresses.
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1451 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	1452 HeapWord* dst_addr;
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1453 if (src_addr < start) {
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1454 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	1455 } else if (src_addr > space->bottom()) {
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1456 // 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	1457 // 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	1458 // destination from the previous region.
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1459 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	1460 dst_addr = cp->destination() + cp->data_size();
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1461 } else {
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1462 // Filling the entire space.
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1463 dst_addr = space->bottom();
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1464 }
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1465 assert(dst_addr != NULL, "sanity");
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1466
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1467 // Update the summary data.
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1468 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	1469 src_addr, space->top(), NULL,
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1470 dst_addr, space->end(),
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1471 _space_info[id].new_top_addr());
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1472 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	1473 }
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1474
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1475 void
496 b27c885f75f9 6786188: par compact - "SplitALot" stress mode should fill to_space jcoomes parents: 495 diff changeset	1476 PSParallelCompact::provoke_split_fill_survivor(SpaceId id)
b27c885f75f9 6786188: par compact - "SplitALot" stress mode should fill to_space jcoomes parents: 495 diff changeset	1477 {
b27c885f75f9 6786188: par compact - "SplitALot" stress mode should fill to_space jcoomes parents: 495 diff changeset	1478 if (total_invocations() % (ParallelOldGCSplitInterval * 3) != 0) {
b27c885f75f9 6786188: par compact - "SplitALot" stress mode should fill to_space jcoomes parents: 495 diff changeset	1479 return;
b27c885f75f9 6786188: par compact - "SplitALot" stress mode should fill to_space jcoomes parents: 495 diff changeset	1480 }
b27c885f75f9 6786188: par compact - "SplitALot" stress mode should fill to_space jcoomes parents: 495 diff changeset	1481
b27c885f75f9 6786188: par compact - "SplitALot" stress mode should fill to_space jcoomes parents: 495 diff changeset	1482 MutableSpace* const space = _space_info[id].space();
b27c885f75f9 6786188: par compact - "SplitALot" stress mode should fill to_space jcoomes parents: 495 diff changeset	1483 if (space->is_empty()) {
b27c885f75f9 6786188: par compact - "SplitALot" stress mode should fill to_space jcoomes parents: 495 diff changeset	1484 HeapWord* b = space->bottom();
b27c885f75f9 6786188: par compact - "SplitALot" stress mode should fill to_space jcoomes parents: 495 diff changeset	1485 HeapWord* t = b + space->capacity_in_words() / 2;
b27c885f75f9 6786188: par compact - "SplitALot" stress mode should fill to_space jcoomes parents: 495 diff changeset	1486 space->set_top(t);
b27c885f75f9 6786188: par compact - "SplitALot" stress mode should fill to_space jcoomes parents: 495 diff changeset	1487 if (ZapUnusedHeapArea) {
b27c885f75f9 6786188: par compact - "SplitALot" stress mode should fill to_space jcoomes parents: 495 diff changeset	1488 space->set_top_for_allocations();
b27c885f75f9 6786188: par compact - "SplitALot" stress mode should fill to_space jcoomes parents: 495 diff changeset	1489 }
b27c885f75f9 6786188: par compact - "SplitALot" stress mode should fill to_space jcoomes parents: 495 diff changeset	1490
1571 2d127394260e 6916623: Align object to 16 bytes to use Compressed Oops with java heap up to 64Gb kvn parents: 1489 diff changeset	1491 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	1492 size_t obj_len = min_size;
496 b27c885f75f9 6786188: par compact - "SplitALot" stress mode should fill to_space jcoomes parents: 495 diff changeset	1493 while (b + obj_len <= t) {
b27c885f75f9 6786188: par compact - "SplitALot" stress mode should fill to_space jcoomes parents: 495 diff changeset	1494 CollectedHeap::fill_with_object(b, obj_len);
b27c885f75f9 6786188: par compact - "SplitALot" stress mode should fill to_space jcoomes parents: 495 diff changeset	1495 mark_bitmap()->mark_obj(b, obj_len);
b27c885f75f9 6786188: par compact - "SplitALot" stress mode should fill to_space jcoomes parents: 495 diff changeset	1496 summary_data().add_obj(b, obj_len);
b27c885f75f9 6786188: par compact - "SplitALot" stress mode should fill to_space jcoomes parents: 495 diff changeset	1497 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	1498 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	1499 }
b27c885f75f9 6786188: par compact - "SplitALot" stress mode should fill to_space jcoomes parents: 495 diff changeset	1500 if (b < t) {
b27c885f75f9 6786188: par compact - "SplitALot" stress mode should fill to_space jcoomes parents: 495 diff changeset	1501 // 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	1502 space->set_top(b);
b27c885f75f9 6786188: par compact - "SplitALot" stress mode should fill to_space jcoomes parents: 495 diff changeset	1503 if (ZapUnusedHeapArea) {
b27c885f75f9 6786188: par compact - "SplitALot" stress mode should fill to_space jcoomes parents: 495 diff changeset	1504 space->set_top_for_allocations();
b27c885f75f9 6786188: par compact - "SplitALot" stress mode should fill to_space jcoomes parents: 495 diff changeset	1505 }
b27c885f75f9 6786188: par compact - "SplitALot" stress mode should fill to_space jcoomes parents: 495 diff changeset	1506 }
b27c885f75f9 6786188: par compact - "SplitALot" stress mode should fill to_space jcoomes parents: 495 diff changeset	1507
b27c885f75f9 6786188: par compact - "SplitALot" stress mode should fill to_space jcoomes parents: 495 diff changeset	1508 HeapWord** nta = _space_info[id].new_top_addr();
b27c885f75f9 6786188: par compact - "SplitALot" stress mode should fill to_space jcoomes parents: 495 diff changeset	1509 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	1510 space->bottom(), space->top(), NULL,
b27c885f75f9 6786188: par compact - "SplitALot" stress mode should fill to_space jcoomes parents: 495 diff changeset	1511 space->bottom(), space->end(), nta);
b27c885f75f9 6786188: par compact - "SplitALot" stress mode should fill to_space jcoomes parents: 495 diff changeset	1512 assert(result, "space must fit into itself");
b27c885f75f9 6786188: par compact - "SplitALot" stress mode should fill to_space jcoomes parents: 495 diff changeset	1513 }
b27c885f75f9 6786188: par compact - "SplitALot" stress mode should fill to_space jcoomes parents: 495 diff changeset	1514 }
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 void
483 0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1517 PSParallelCompact::provoke_split(bool & max_compaction)
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1518 {
496 b27c885f75f9 6786188: par compact - "SplitALot" stress mode should fill to_space jcoomes parents: 495 diff changeset	1519 if (total_invocations() % ParallelOldGCSplitInterval != 0) {
b27c885f75f9 6786188: par compact - "SplitALot" stress mode should fill to_space jcoomes parents: 495 diff changeset	1520 return;
b27c885f75f9 6786188: par compact - "SplitALot" stress mode should fill to_space jcoomes parents: 495 diff changeset	1521 }
b27c885f75f9 6786188: par compact - "SplitALot" stress mode should fill to_space jcoomes parents: 495 diff changeset	1522
483 0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1523 const size_t region_size = ParallelCompactData::RegionSize;
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1524 ParallelCompactData& sd = summary_data();
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1525
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1526 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	1527 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	1528 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	1529 _space_info[eden_space_id].new_top());
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1530 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	1531 _space_info[from_space_id].new_top());
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1532
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1533 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	1534 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	1535 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	1536 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	1537 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	1538
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1539 // 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	1540 SpaceId id;
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1541 MutableSpace* space;
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1542 size_t live_words;
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1543 size_t fill_words;
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1544 if (eden_live + eden_fillable >= region_size * 2) {
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1545 id = eden_space_id;
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1546 space = eden_space;
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1547 live_words = eden_live;
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1548 fill_words = eden_fillable;
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1549 } 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	1550 id = from_space_id;
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1551 space = from_space;
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1552 live_words = from_live;
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1553 fill_words = from_fillable;
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1554 } else {
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1555 return; // Give up.
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1556 }
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1557 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	1558
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1559 if (live_words < region_size * 2) {
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1560 // 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	1561 HeapWord* const fill_start = space->top();
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1562 live_words += fill_words;
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1563
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1564 space->set_top(fill_start + fill_words);
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1565 if (ZapUnusedHeapArea) {
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1566 space->set_top_for_allocations();
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1567 }
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1568
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1569 HeapWord* cur_addr = fill_start;
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1570 while (fill_words > 0) {
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1571 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	1572 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	1573 if (fill_words - cur_size < min_fill_size) {
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1574 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	1575 }
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1576
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1577 CollectedHeap::fill_with_object(cur_addr, cur_size);
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1578 mark_bitmap()->mark_obj(cur_addr, cur_size);
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1579 sd.add_obj(cur_addr, cur_size);
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1580
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1581 cur_addr += cur_size;
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1582 fill_words -= cur_size;
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1583 }
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1584
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1585 summarize_new_objects(id, fill_start);
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1586 }
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1587
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1588 max_compaction = false;
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1589
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1590 // 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	1591 // 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	1592 id = old_space_id;
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1593 space = _space_info[id].space();
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1594 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	1595 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	1596 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	1597
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1598 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	1599 // 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	1600 HeapWord* const fill_start = space->top();
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1601 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	1602 space->set_top(space->top() + fill_size);
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1603 if (ZapUnusedHeapArea) {
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1604 space->set_top_for_allocations();
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1605 }
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1606 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	1607 summarize_new_objects(id, fill_start);
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1608 _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	1609 } else if (dead + free_at_end > free_target) {
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1610 // 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	1611 HeapWord* cur = sd.region_align_down(space->top());
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1612 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	1613 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	1614 while (dead_to_right < free_target) {
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1615 cur -= region_size;
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1616 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	1617 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	1618 }
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1619 _space_info[id].set_dense_prefix(cur);
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 #endif // #ifndef PRODUCT
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1623
0 a61af66fc99e Initial load duke parents: diff changeset	1624 void PSParallelCompact::summarize_spaces_quick()
a61af66fc99e Initial load duke parents: diff changeset	1625 {
a61af66fc99e Initial load duke parents: diff changeset	1626 for (unsigned int i = 0; i < last_space_id; ++i) {
a61af66fc99e Initial load duke parents: diff changeset	1627 const MutableSpace* space = _space_info[i].space();
482 7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1628 HeapWord** nta = _space_info[i].new_top_addr();
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1629 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	1630 space->bottom(), space->top(), NULL,
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1631 space->bottom(), space->end(), nta);
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1632 assert(result, "space must fit into itself");
0 a61af66fc99e Initial load duke parents: diff changeset	1633 _space_info[i].set_dense_prefix(space->bottom());
a61af66fc99e Initial load duke parents: diff changeset	1634 }
496 b27c885f75f9 6786188: par compact - "SplitALot" stress mode should fill to_space jcoomes parents: 495 diff changeset	1635
b27c885f75f9 6786188: par compact - "SplitALot" stress mode should fill to_space jcoomes parents: 495 diff changeset	1636 #ifndef PRODUCT
b27c885f75f9 6786188: par compact - "SplitALot" stress mode should fill to_space jcoomes parents: 495 diff changeset	1637 if (ParallelOldGCSplitALot) {
b27c885f75f9 6786188: par compact - "SplitALot" stress mode should fill to_space jcoomes parents: 495 diff changeset	1638 provoke_split_fill_survivor(to_space_id);
b27c885f75f9 6786188: par compact - "SplitALot" stress mode should fill to_space jcoomes parents: 495 diff changeset	1639 }
b27c885f75f9 6786188: par compact - "SplitALot" stress mode should fill to_space jcoomes parents: 495 diff changeset	1640 #endif // #ifndef PRODUCT
0 a61af66fc99e Initial load duke parents: diff changeset	1641 }
a61af66fc99e Initial load duke parents: diff changeset	1642
a61af66fc99e Initial load duke parents: diff changeset	1643 void PSParallelCompact::fill_dense_prefix_end(SpaceId id)
a61af66fc99e Initial load duke parents: diff changeset	1644 {
a61af66fc99e Initial load duke parents: diff changeset	1645 HeapWord* const dense_prefix_end = dense_prefix(id);
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1646 const RegionData* region = _summary_data.addr_to_region_ptr(dense_prefix_end);
0 a61af66fc99e Initial load duke parents: diff changeset	1647 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	1648 if (dead_space_crosses_boundary(region, dense_prefix_bit)) {
0 a61af66fc99e Initial load duke parents: diff changeset	1649 // Only enough dead space is filled so that any remaining dead space to the
a61af66fc99e Initial load duke parents: diff changeset	1650 // left is larger than the minimum filler object. (The remainder is filled
a61af66fc99e Initial load duke parents: diff changeset	1651 // during the copy/update phase.)
a61af66fc99e Initial load duke parents: diff changeset	1652 //
a61af66fc99e Initial load duke parents: diff changeset	1653 // The size of the dead space to the right of the boundary is not a
a61af66fc99e Initial load duke parents: diff changeset	1654 // concern, since compaction will be able to use whatever space is
a61af66fc99e Initial load duke parents: diff changeset	1655 // available.
a61af66fc99e Initial load duke parents: diff changeset	1656 //
a61af66fc99e Initial load duke parents: diff changeset	1657 // Here '\|\|' is the boundary, 'x' represents a don't care bit and a box
a61af66fc99e Initial load duke parents: diff changeset	1658 // surrounds the space to be filled with an object.
a61af66fc99e Initial load duke parents: diff changeset	1659 //
a61af66fc99e Initial load duke parents: diff changeset	1660 // In the 32-bit VM, each bit represents two 32-bit words:
a61af66fc99e Initial load duke parents: diff changeset	1661 // +---+
a61af66fc99e Initial load duke parents: diff changeset	1662 // a) beg_bits: ... x x x \| 0 \| \|\| 0 x x ...
a61af66fc99e Initial load duke parents: diff changeset	1663 // end_bits: ... x x x \| 0 \| \|\| 0 x x ...
a61af66fc99e Initial load duke parents: diff changeset	1664 // +---+
a61af66fc99e Initial load duke parents: diff changeset	1665 //
a61af66fc99e Initial load duke parents: diff changeset	1666 // In the 64-bit VM, each bit represents one 64-bit word:
a61af66fc99e Initial load duke parents: diff changeset	1667 // +------------+
a61af66fc99e Initial load duke parents: diff changeset	1668 // b) beg_bits: ... x x x \| 0 \|\| 0 \| x x ...
a61af66fc99e Initial load duke parents: diff changeset	1669 // end_bits: ... x x 1 \| 0 \|\| 0 \| x x ...
a61af66fc99e Initial load duke parents: diff changeset	1670 // +------------+
a61af66fc99e Initial load duke parents: diff changeset	1671 // +-------+
a61af66fc99e Initial load duke parents: diff changeset	1672 // c) beg_bits: ... x x \| 0 0 \| \|\| 0 x x ...
a61af66fc99e Initial load duke parents: diff changeset	1673 // end_bits: ... x 1 \| 0 0 \| \|\| 0 x x ...
a61af66fc99e Initial load duke parents: diff changeset	1674 // +-------+
a61af66fc99e Initial load duke parents: diff changeset	1675 // +-----------+
a61af66fc99e Initial load duke parents: diff changeset	1676 // d) beg_bits: ... x \| 0 0 0 \| \|\| 0 x x ...
a61af66fc99e Initial load duke parents: diff changeset	1677 // end_bits: ... 1 \| 0 0 0 \| \|\| 0 x x ...
a61af66fc99e Initial load duke parents: diff changeset	1678 // +-----------+
a61af66fc99e Initial load duke parents: diff changeset	1679 // +-------+
a61af66fc99e Initial load duke parents: diff changeset	1680 // e) beg_bits: ... 0 0 \| 0 0 \| \|\| 0 x x ...
a61af66fc99e Initial load duke parents: diff changeset	1681 // end_bits: ... 0 0 \| 0 0 \| \|\| 0 x x ...
a61af66fc99e Initial load duke parents: diff changeset	1682 // +-------+
a61af66fc99e Initial load duke parents: diff changeset	1683
a61af66fc99e Initial load duke parents: diff changeset	1684 // 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	1685 size_t obj_len = CollectedHeap::min_fill_size();
0 a61af66fc99e Initial load duke parents: diff changeset	1686 HeapWord* obj_beg = dense_prefix_end - obj_len;
a61af66fc99e Initial load duke parents: diff changeset	1687
a61af66fc99e Initial load duke parents: diff changeset	1688 #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	1689 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	1690 // 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	1691 } else if (_mark_bitmap.is_obj_end(dense_prefix_bit - 2)) {
0 a61af66fc99e Initial load duke parents: diff changeset	1692 // Case b above.
a61af66fc99e Initial load duke parents: diff changeset	1693 obj_beg = dense_prefix_end - 1;
a61af66fc99e Initial load duke parents: diff changeset	1694 } else if (!_mark_bitmap.is_obj_end(dense_prefix_bit - 3) &&
a61af66fc99e Initial load duke parents: diff changeset	1695 _mark_bitmap.is_obj_end(dense_prefix_bit - 4)) {
a61af66fc99e Initial load duke parents: diff changeset	1696 // Case d above.
a61af66fc99e Initial load duke parents: diff changeset	1697 obj_beg = dense_prefix_end - 3;
a61af66fc99e Initial load duke parents: diff changeset	1698 obj_len = 3;
a61af66fc99e Initial load duke parents: diff changeset	1699 }
a61af66fc99e Initial load duke parents: diff changeset	1700 #endif // #ifdef _LP64
a61af66fc99e Initial load duke parents: diff changeset	1701
482 7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1702 CollectedHeap::fill_with_object(obj_beg, obj_len);
0 a61af66fc99e Initial load duke parents: diff changeset	1703 _mark_bitmap.mark_obj(obj_beg, obj_len);
a61af66fc99e Initial load duke parents: diff changeset	1704 _summary_data.add_obj(obj_beg, obj_len);
a61af66fc99e Initial load duke parents: diff changeset	1705 assert(start_array(id) != NULL, "sanity");
a61af66fc99e Initial load duke parents: diff changeset	1706 start_array(id)->allocate_block(obj_beg);
a61af66fc99e Initial load duke parents: diff changeset	1707 }
a61af66fc99e Initial load duke parents: diff changeset	1708 }
a61af66fc99e Initial load duke parents: diff changeset	1709
a61af66fc99e Initial load duke parents: diff changeset	1710 void
482 7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1711 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	1712 {
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1713 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	1714 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	1715 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	1716 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	1717 cur->set_source_region(0);
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1718 }
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1719 }
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1720
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1721 void
0 a61af66fc99e Initial load duke parents: diff changeset	1722 PSParallelCompact::summarize_space(SpaceId id, bool maximum_compaction)
a61af66fc99e Initial load duke parents: diff changeset	1723 {
a61af66fc99e Initial load duke parents: diff changeset	1724 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	1725 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	1726 ParallelOldGCSplitALot && id == old_space_id,
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1727 "should have been reset in summarize_spaces_quick()");
0 a61af66fc99e Initial load duke parents: diff changeset	1728
a61af66fc99e Initial load duke parents: diff changeset	1729 const MutableSpace* space = _space_info[id].space();
265 f88815ca1af1 6483129: par compact assertion failure (new_top > bottom) jcoomes parents: 264 diff changeset	1730 if (_space_info[id].new_top() != space->bottom()) {
f88815ca1af1 6483129: par compact assertion failure (new_top > bottom) jcoomes parents: 264 diff changeset	1731 HeapWord* dense_prefix_end = compute_dense_prefix(id, maximum_compaction);
f88815ca1af1 6483129: par compact assertion failure (new_top > bottom) jcoomes parents: 264 diff changeset	1732 _space_info[id].set_dense_prefix(dense_prefix_end);
0 a61af66fc99e Initial load duke parents: diff changeset	1733
a61af66fc99e Initial load duke parents: diff changeset	1734 #ifndef PRODUCT
265 f88815ca1af1 6483129: par compact assertion failure (new_top > bottom) jcoomes parents: 264 diff changeset	1735 if (TraceParallelOldGCDensePrefix) {
f88815ca1af1 6483129: par compact assertion failure (new_top > bottom) jcoomes parents: 264 diff changeset	1736 print_dense_prefix_stats("ratio", id, maximum_compaction,
f88815ca1af1 6483129: par compact assertion failure (new_top > bottom) jcoomes parents: 264 diff changeset	1737 dense_prefix_end);
f88815ca1af1 6483129: par compact assertion failure (new_top > bottom) jcoomes parents: 264 diff changeset	1738 HeapWord* addr = compute_dense_prefix_via_density(id, maximum_compaction);
f88815ca1af1 6483129: par compact assertion failure (new_top > bottom) jcoomes parents: 264 diff changeset	1739 print_dense_prefix_stats("density", id, maximum_compaction, addr);
f88815ca1af1 6483129: par compact assertion failure (new_top > bottom) jcoomes parents: 264 diff changeset	1740 }
0 a61af66fc99e Initial load duke parents: diff changeset	1741 #endif // #ifndef PRODUCT
a61af66fc99e Initial load duke parents: diff changeset	1742
483 0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1743 // 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	1744 // 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	1745 // compacts everything can be left in place.
265 f88815ca1af1 6483129: par compact assertion failure (new_top > bottom) jcoomes parents: 264 diff changeset	1746 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	1747 // 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	1748 // 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	1749 // 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	1750 // 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	1751 // 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	1752 fill_dense_prefix_end(id);
482 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 // 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	1755 _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	1756 _summary_data.summarize(_space_info[id].split_info(),
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1757 dense_prefix_end, space->top(), NULL,
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1758 dense_prefix_end, space->end(),
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1759 _space_info[id].new_top_addr());
265 f88815ca1af1 6483129: par compact assertion failure (new_top > bottom) jcoomes parents: 264 diff changeset	1760 }
0 a61af66fc99e Initial load duke parents: diff changeset	1761 }
a61af66fc99e Initial load duke parents: diff changeset	1762
a61af66fc99e Initial load duke parents: diff changeset	1763 if (TraceParallelOldGCSummaryPhase) {
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1764 const size_t region_size = ParallelCompactData::RegionSize;
265 f88815ca1af1 6483129: par compact assertion failure (new_top > bottom) jcoomes parents: 264 diff changeset	1765 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	1766 const size_t dp_region = _summary_data.addr_to_region_idx(dense_prefix_end);
0 a61af66fc99e Initial load duke parents: diff changeset	1767 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	1768 HeapWord* const new_top = _space_info[id].new_top();
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1769 const HeapWord* nt_aligned_up = _summary_data.region_align_up(new_top);
0 a61af66fc99e Initial load duke parents: diff changeset	1770 const size_t cr_words = pointer_delta(nt_aligned_up, dense_prefix_end);
a61af66fc99e Initial load duke parents: diff changeset	1771 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	1772 "dp_region=" SIZE_FORMAT " " "dp_count=" SIZE_FORMAT " "
0 a61af66fc99e Initial load duke parents: diff changeset	1773 "cr_count=" SIZE_FORMAT " " "nt=" PTR_FORMAT,
a61af66fc99e Initial load duke parents: diff changeset	1774 id, space->capacity_in_words(), dense_prefix_end,
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1775 dp_region, dp_words / region_size,
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1776 cr_words / region_size, new_top);
0 a61af66fc99e Initial load duke parents: diff changeset	1777 }
a61af66fc99e Initial load duke parents: diff changeset	1778 }
a61af66fc99e Initial load duke parents: diff changeset	1779
482 7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1780 #ifndef PRODUCT
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1781 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	1782 HeapWord* dst_beg, HeapWord* dst_end,
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1783 SpaceId src_space_id,
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1784 HeapWord* src_beg, HeapWord* src_end)
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1785 {
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1786 if (TraceParallelOldGCSummaryPhase) {
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1787 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	1788 "src=" PTR_FORMAT "-" PTR_FORMAT " "
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1789 SIZE_FORMAT "-" SIZE_FORMAT " "
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1790 "dst=" PTR_FORMAT "-" PTR_FORMAT " "
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1791 SIZE_FORMAT "-" SIZE_FORMAT,
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1792 src_space_id, space_names[src_space_id],
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1793 dst_space_id, space_names[dst_space_id],
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1794 src_beg, src_end,
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1795 _summary_data.addr_to_region_idx(src_beg),
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1796 _summary_data.addr_to_region_idx(src_end),
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1797 dst_beg, dst_end,
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1798 _summary_data.addr_to_region_idx(dst_beg),
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1799 _summary_data.addr_to_region_idx(dst_end));
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1800 }
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1801 }
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1802 #endif // #ifndef PRODUCT
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1803
0 a61af66fc99e Initial load duke parents: diff changeset	1804 void PSParallelCompact::summary_phase(ParCompactionManager* cm,
a61af66fc99e Initial load duke parents: diff changeset	1805 bool maximum_compaction)
a61af66fc99e Initial load duke parents: diff changeset	1806 {
a61af66fc99e Initial load duke parents: diff changeset	1807 EventMark m("2 summarize");
a61af66fc99e Initial load duke parents: diff changeset	1808 TraceTime tm("summary phase", print_phases(), true, gclog_or_tty);
a61af66fc99e Initial load duke parents: diff changeset	1809 // trace("2");
a61af66fc99e Initial load duke parents: diff changeset	1810
a61af66fc99e Initial load duke parents: diff changeset	1811 #ifdef ASSERT
a61af66fc99e Initial load duke parents: diff changeset	1812 if (TraceParallelOldGCMarkingPhase) {
a61af66fc99e Initial load duke parents: diff changeset	1813 tty->print_cr("add_obj_count=" SIZE_FORMAT " "
a61af66fc99e Initial load duke parents: diff changeset	1814 "add_obj_bytes=" SIZE_FORMAT,
a61af66fc99e Initial load duke parents: diff changeset	1815 add_obj_count, add_obj_size * HeapWordSize);
a61af66fc99e Initial load duke parents: diff changeset	1816 tty->print_cr("mark_bitmap_count=" SIZE_FORMAT " "
a61af66fc99e Initial load duke parents: diff changeset	1817 "mark_bitmap_bytes=" SIZE_FORMAT,
a61af66fc99e Initial load duke parents: diff changeset	1818 mark_bitmap_count, mark_bitmap_size * HeapWordSize);
a61af66fc99e Initial load duke parents: diff changeset	1819 }
a61af66fc99e Initial load duke parents: diff changeset	1820 #endif // #ifdef ASSERT
a61af66fc99e Initial load duke parents: diff changeset	1821
a61af66fc99e Initial load duke parents: diff changeset	1822 // Quick summarization of each space into itself, to see how much is live.
a61af66fc99e Initial load duke parents: diff changeset	1823 summarize_spaces_quick();
a61af66fc99e Initial load duke parents: diff changeset	1824
a61af66fc99e Initial load duke parents: diff changeset	1825 if (TraceParallelOldGCSummaryPhase) {
a61af66fc99e Initial load duke parents: diff changeset	1826 tty->print_cr("summary_phase: after summarizing each space to self");
a61af66fc99e Initial load duke parents: diff changeset	1827 Universe::print();
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1828 NOT_PRODUCT(print_region_ranges());
0 a61af66fc99e Initial load duke parents: diff changeset	1829 if (Verbose) {
a61af66fc99e Initial load duke parents: diff changeset	1830 NOT_PRODUCT(print_initial_summary_data(_summary_data, _space_info));
a61af66fc99e Initial load duke parents: diff changeset	1831 }
a61af66fc99e Initial load duke parents: diff changeset	1832 }
a61af66fc99e Initial load duke parents: diff changeset	1833
a61af66fc99e Initial load duke parents: diff changeset	1834 // The amount of live data that will end up in old space (assuming it fits).
a61af66fc99e Initial load duke parents: diff changeset	1835 size_t old_space_total_live = 0;
482 7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1836 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	1837 for (unsigned int id = old_space_id; id < last_space_id; ++id) {
0 a61af66fc99e Initial load duke parents: diff changeset	1838 old_space_total_live += pointer_delta(_space_info[id].new_top(),
a61af66fc99e Initial load duke parents: diff changeset	1839 _space_info[id].space()->bottom());
a61af66fc99e Initial load duke parents: diff changeset	1840 }
a61af66fc99e Initial load duke parents: diff changeset	1841
482 7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1842 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	1843 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	1844 if (old_space_total_live > old_capacity) {
0 a61af66fc99e Initial load duke parents: diff changeset	1845 // XXX - should also try to expand
a61af66fc99e Initial load duke parents: diff changeset	1846 maximum_compaction = true;
a61af66fc99e Initial load duke parents: diff changeset	1847 }
483 0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1848 #ifndef PRODUCT
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1849 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	1850 provoke_split(maximum_compaction);
483 0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1851 }
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	1852 #endif // #ifndef PRODUCT
0 a61af66fc99e Initial load duke parents: diff changeset	1853
a61af66fc99e Initial load duke parents: diff changeset	1854 // Permanent and Old generations.
a61af66fc99e Initial load duke parents: diff changeset	1855 summarize_space(perm_space_id, maximum_compaction);
a61af66fc99e Initial load duke parents: diff changeset	1856 summarize_space(old_space_id, maximum_compaction);
a61af66fc99e Initial load duke parents: diff changeset	1857
482 7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1858 // 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	1859 // 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	1860 // 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	1861 // target.
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1862 SpaceId dst_space_id = old_space_id;
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1863 HeapWord* dst_space_end = old_space->end();
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1864 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	1865 for (unsigned int id = eden_space_id; id < last_space_id; ++id) {
0 a61af66fc99e Initial load duke parents: diff changeset	1866 const MutableSpace* space = _space_info[id].space();
a61af66fc99e Initial load duke parents: diff changeset	1867 const size_t live = pointer_delta(_space_info[id].new_top(),
a61af66fc99e Initial load duke parents: diff changeset	1868 space->bottom());
482 7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1869 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	1870
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1871 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	1872 SpaceId(id), space->bottom(), space->top());)
266 2214b226b7f0 6724367: par compact could clear less young gen summary data jcoomes parents: 265 diff changeset	1873 if (live > 0 && live <= available) {
0 a61af66fc99e Initial load duke parents: diff changeset	1874 // All the live data will fit.
482 7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1875 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	1876 space->bottom(), space->top(),
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1877 NULL,
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1878 *new_top_addr, dst_space_end,
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1879 new_top_addr);
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1880 assert(done, "space must fit into old gen");
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1881
266 2214b226b7f0 6724367: par compact could clear less young gen summary data jcoomes parents: 265 diff changeset	1882 // Reset the new_top value for the space.
2214b226b7f0 6724367: par compact could clear less young gen summary data jcoomes parents: 265 diff changeset	1883 _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	1884 } else if (live > 0) {
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1885 // 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	1886 HeapWord* next_src_addr = NULL;
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1887 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	1888 space->bottom(), space->top(),
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1889 &next_src_addr,
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1890 *new_top_addr, dst_space_end,
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1891 new_top_addr);
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1892 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	1893 assert(next_src_addr != NULL, "sanity");
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1894
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1895 // 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	1896 // within the space itself.
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1897 dst_space_id = SpaceId(id);
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1898 dst_space_end = space->end();
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1899 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	1900 NOT_PRODUCT(summary_phase_msg(dst_space_id,
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1901 space->bottom(), dst_space_end,
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1902 SpaceId(id), next_src_addr, space->top());)
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1903 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	1904 next_src_addr, space->top(),
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1905 NULL,
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1906 space->bottom(), dst_space_end,
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1907 new_top_addr);
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1908 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	1909 assert(*new_top_addr <= space->top(), "usage should not grow");
0 a61af66fc99e Initial load duke parents: diff changeset	1910 }
a61af66fc99e Initial load duke parents: diff changeset	1911 }
a61af66fc99e Initial load duke parents: diff changeset	1912
a61af66fc99e Initial load duke parents: diff changeset	1913 if (TraceParallelOldGCSummaryPhase) {
a61af66fc99e Initial load duke parents: diff changeset	1914 tty->print_cr("summary_phase: after final summarization");
a61af66fc99e Initial load duke parents: diff changeset	1915 Universe::print();
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1916 NOT_PRODUCT(print_region_ranges());
0 a61af66fc99e Initial load duke parents: diff changeset	1917 if (Verbose) {
a61af66fc99e Initial load duke parents: diff changeset	1918 NOT_PRODUCT(print_generic_summary_data(_summary_data, _space_info));
a61af66fc99e Initial load duke parents: diff changeset	1919 }
a61af66fc99e Initial load duke parents: diff changeset	1920 }
a61af66fc99e Initial load duke parents: diff changeset	1921 }
a61af66fc99e Initial load duke parents: diff changeset	1922
a61af66fc99e Initial load duke parents: diff changeset	1923 // This method should contain all heap-specific policy for invoking a full
a61af66fc99e Initial load duke parents: diff changeset	1924 // collection. invoke_no_policy() will only attempt to compact the heap; it
a61af66fc99e Initial load duke parents: diff changeset	1925 // will do nothing further. If we need to bail out for policy reasons, scavenge
a61af66fc99e Initial load duke parents: diff changeset	1926 // before full gc, or any other specialized behavior, it needs to be added here.
a61af66fc99e Initial load duke parents: diff changeset	1927 //
a61af66fc99e Initial load duke parents: diff changeset	1928 // Note that this method should only be called from the vm_thread while at a
a61af66fc99e Initial load duke parents: diff changeset	1929 // safepoint.
1387 0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 1311 diff changeset	1930 //
0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 1311 diff changeset	1931 // 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	1932 // 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	1933 // 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	1934 // are being taken to free space.
0 a61af66fc99e Initial load duke parents: diff changeset	1935 void PSParallelCompact::invoke(bool maximum_heap_compaction) {
a61af66fc99e Initial load duke parents: diff changeset	1936 assert(SafepointSynchronize::is_at_safepoint(), "should be at safepoint");
a61af66fc99e Initial load duke parents: diff changeset	1937 assert(Thread::current() == (Thread*)VMThread::vm_thread(),
a61af66fc99e Initial load duke parents: diff changeset	1938 "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	1939
0 a61af66fc99e Initial load duke parents: diff changeset	1940 ParallelScavengeHeap* heap = gc_heap();
a61af66fc99e Initial load duke parents: diff changeset	1941 GCCause::Cause gc_cause = heap->gc_cause();
a61af66fc99e Initial load duke parents: diff changeset	1942 assert(!heap->is_gc_active(), "not reentrant");
a61af66fc99e Initial load duke parents: diff changeset	1943
a61af66fc99e Initial load duke parents: diff changeset	1944 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	1945 IsGCActiveMark mark;
0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 1311 diff changeset	1946
0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 1311 diff changeset	1947 if (ScavengeBeforeFullGC) {
0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 1311 diff changeset	1948 PSScavenge::invoke_no_policy();
0 a61af66fc99e Initial load duke parents: diff changeset	1949 }
1387 0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 1311 diff changeset	1950
0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 1311 diff changeset	1951 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	1952 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	1953
0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 1311 diff changeset	1954 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	1955 maximum_heap_compaction);
0 a61af66fc99e Initial load duke parents: diff changeset	1956 }
a61af66fc99e Initial load duke parents: diff changeset	1957
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1958 bool ParallelCompactData::region_contains(size_t region_index, HeapWord* addr) {
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1959 size_t addr_region_index = addr_to_region_idx(addr);
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	1960 return region_index == addr_region_index;
0 a61af66fc99e Initial load duke parents: diff changeset	1961 }
a61af66fc99e Initial load duke parents: diff changeset	1962
a61af66fc99e Initial load duke parents: diff changeset	1963 // This method contains no policy. You should probably
a61af66fc99e Initial load duke parents: diff changeset	1964 // be calling invoke() instead.
a61af66fc99e Initial load duke parents: diff changeset	1965 void PSParallelCompact::invoke_no_policy(bool maximum_heap_compaction) {
a61af66fc99e Initial load duke parents: diff changeset	1966 assert(SafepointSynchronize::is_at_safepoint(), "must be at a safepoint");
a61af66fc99e Initial load duke parents: diff changeset	1967 assert(ref_processor() != NULL, "Sanity");
a61af66fc99e Initial load duke parents: diff changeset	1968
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	1969 if (GC_locker::check_active_before_gc()) {
0 a61af66fc99e Initial load duke parents: diff changeset	1970 return;
a61af66fc99e Initial load duke parents: diff changeset	1971 }
a61af66fc99e Initial load duke parents: diff changeset	1972
a61af66fc99e Initial load duke parents: diff changeset	1973 TimeStamp marking_start;
a61af66fc99e Initial load duke parents: diff changeset	1974 TimeStamp compaction_start;
a61af66fc99e Initial load duke parents: diff changeset	1975 TimeStamp collection_exit;
a61af66fc99e Initial load duke parents: diff changeset	1976
a61af66fc99e Initial load duke parents: diff changeset	1977 ParallelScavengeHeap* heap = gc_heap();
a61af66fc99e Initial load duke parents: diff changeset	1978 GCCause::Cause gc_cause = heap->gc_cause();
a61af66fc99e Initial load duke parents: diff changeset	1979 PSYoungGen* young_gen = heap->young_gen();
a61af66fc99e Initial load duke parents: diff changeset	1980 PSOldGen* old_gen = heap->old_gen();
a61af66fc99e Initial load duke parents: diff changeset	1981 PSPermGen* perm_gen = heap->perm_gen();
a61af66fc99e Initial load duke parents: diff changeset	1982 PSAdaptiveSizePolicy* size_policy = heap->size_policy();
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 // 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	1985 // 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	1986 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	1987 heap->collector_policy());
0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 1311 diff changeset	1988
263 12eea04c8b06 6672698: mangle_unused_area() should not remangle the entire heap at each collection. jmasa parents: 210 diff changeset	1989 if (ZapUnusedHeapArea) {
12eea04c8b06 6672698: mangle_unused_area() should not remangle the entire heap at each collection. jmasa parents: 210 diff changeset	1990 // 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	1991 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	1992 }
12eea04c8b06 6672698: mangle_unused_area() should not remangle the entire heap at each collection. jmasa parents: 210 diff changeset	1993
615 c6c601a0f2d6 6797870: Add -XX:+{HeapDump,PrintClassHistogram}{Before,After}FullGC ysr parents: 546 diff changeset	1994 heap->pre_full_gc_dump();
c6c601a0f2d6 6797870: Add -XX:+{HeapDump,PrintClassHistogram}{Before,After}FullGC ysr parents: 546 diff changeset	1995
0 a61af66fc99e Initial load duke parents: diff changeset	1996 _print_phases = PrintGCDetails && PrintParallelOldGCPhaseTimes;
a61af66fc99e Initial load duke parents: diff changeset	1997
a61af66fc99e Initial load duke parents: diff changeset	1998 // Make sure data structures are sane, make the heap parsable, and do other
a61af66fc99e Initial load duke parents: diff changeset	1999 // miscellaneous bookkeeping.
a61af66fc99e Initial load duke parents: diff changeset	2000 PreGCValues pre_gc_values;
a61af66fc99e Initial load duke parents: diff changeset	2001 pre_compact(&pre_gc_values);
a61af66fc99e Initial load duke parents: diff changeset	2002
210 05712c37c828 6676016: ParallelOldGC leaks memory jcoomes parents: 142 diff changeset	2003 // Get the compaction manager reserved for the VM thread.
05712c37c828 6676016: ParallelOldGC leaks memory jcoomes parents: 142 diff changeset	2004 ParCompactionManager* const vmthread_cm =
05712c37c828 6676016: ParallelOldGC leaks memory jcoomes parents: 142 diff changeset	2005 ParCompactionManager::manager_array(gc_task_manager()->workers());
05712c37c828 6676016: ParallelOldGC leaks memory jcoomes parents: 142 diff changeset	2006
0 a61af66fc99e Initial load duke parents: diff changeset	2007 // Place after pre_compact() where the number of invocations is incremented.
a61af66fc99e Initial load duke parents: diff changeset	2008 AdaptiveSizePolicyOutput(size_policy, heap->total_collections());
a61af66fc99e Initial load duke parents: diff changeset	2009
a61af66fc99e Initial load duke parents: diff changeset	2010 {
a61af66fc99e Initial load duke parents: diff changeset	2011 ResourceMark rm;
a61af66fc99e Initial load duke parents: diff changeset	2012 HandleMark hm;
a61af66fc99e Initial load duke parents: diff changeset	2013
a61af66fc99e Initial load duke parents: diff changeset	2014 const bool is_system_gc = gc_cause == GCCause::_java_lang_system_gc;
a61af66fc99e Initial load duke parents: diff changeset	2015
a61af66fc99e Initial load duke parents: diff changeset	2016 // This is useful for debugging but don't change the output the
a61af66fc99e Initial load duke parents: diff changeset	2017 // the customer sees.
a61af66fc99e Initial load duke parents: diff changeset	2018 const char* gc_cause_str = "Full GC";
a61af66fc99e Initial load duke parents: diff changeset	2019 if (is_system_gc && PrintGCDetails) {
a61af66fc99e Initial load duke parents: diff changeset	2020 gc_cause_str = "Full GC (System)";
a61af66fc99e Initial load duke parents: diff changeset	2021 }
a61af66fc99e Initial load duke parents: diff changeset	2022 gclog_or_tty->date_stamp(PrintGC && PrintGCDateStamps);
a61af66fc99e Initial load duke parents: diff changeset	2023 TraceCPUTime tcpu(PrintGCDetails, true, gclog_or_tty);
a61af66fc99e Initial load duke parents: diff changeset	2024 TraceTime t1(gc_cause_str, PrintGC, !PrintGCDetails, gclog_or_tty);
a61af66fc99e Initial load duke parents: diff changeset	2025 TraceCollectorStats tcs(counters());
a61af66fc99e Initial load duke parents: diff changeset	2026 TraceMemoryManagerStats tms(true /* Full GC */);
a61af66fc99e Initial load duke parents: diff changeset	2027
a61af66fc99e Initial load duke parents: diff changeset	2028 if (TraceGen1Time) accumulated_time()->start();
a61af66fc99e Initial load duke parents: diff changeset	2029
a61af66fc99e Initial load duke parents: diff changeset	2030 // Let the size policy know we're starting
a61af66fc99e Initial load duke parents: diff changeset	2031 size_policy->major_collection_begin();
a61af66fc99e Initial load duke parents: diff changeset	2032
a61af66fc99e Initial load duke parents: diff changeset	2033 // When collecting the permanent generation methodOops may be moving,
a61af66fc99e Initial load duke parents: diff changeset	2034 // so we either have to flush all bcp data or convert it into bci.
a61af66fc99e Initial load duke parents: diff changeset	2035 CodeCache::gc_prologue();
a61af66fc99e Initial load duke parents: diff changeset	2036 Threads::gc_prologue();
a61af66fc99e Initial load duke parents: diff changeset	2037
a61af66fc99e Initial load duke parents: diff changeset	2038 NOT_PRODUCT(ref_processor()->verify_no_references_recorded());
a61af66fc99e Initial load duke parents: diff changeset	2039 COMPILER2_PRESENT(DerivedPointerTable::clear());
a61af66fc99e Initial load duke parents: diff changeset	2040
a61af66fc99e Initial load duke parents: diff changeset	2041 ref_processor()->enable_discovery();
457 27a80744a83b 6778647: snap(), snap_policy() should be renamed setup(), setup_policy() ysr parents: 453 diff changeset	2042 ref_processor()->setup_policy(maximum_heap_compaction);
0 a61af66fc99e Initial load duke parents: diff changeset	2043
a61af66fc99e Initial load duke parents: diff changeset	2044 bool marked_for_unloading = false;
a61af66fc99e Initial load duke parents: diff changeset	2045
a61af66fc99e Initial load duke parents: diff changeset	2046 marking_start.update();
210 05712c37c828 6676016: ParallelOldGC leaks memory jcoomes parents: 142 diff changeset	2047 marking_phase(vmthread_cm, maximum_heap_compaction);
0 a61af66fc99e Initial load duke parents: diff changeset	2048
a61af66fc99e Initial load duke parents: diff changeset	2049 #ifndef PRODUCT
a61af66fc99e Initial load duke parents: diff changeset	2050 if (TraceParallelOldGCMarkingPhase) {
a61af66fc99e Initial load duke parents: diff changeset	2051 gclog_or_tty->print_cr("marking_phase: cas_tries %d cas_retries %d "
a61af66fc99e Initial load duke parents: diff changeset	2052 "cas_by_another %d",
a61af66fc99e Initial load duke parents: diff changeset	2053 mark_bitmap()->cas_tries(), mark_bitmap()->cas_retries(),
a61af66fc99e Initial load duke parents: diff changeset	2054 mark_bitmap()->cas_by_another());
a61af66fc99e Initial load duke parents: diff changeset	2055 }
a61af66fc99e Initial load duke parents: diff changeset	2056 #endif // #ifndef PRODUCT
a61af66fc99e Initial load duke parents: diff changeset	2057
a61af66fc99e Initial load duke parents: diff changeset	2058 bool max_on_system_gc = UseMaximumCompactionOnSystemGC && is_system_gc;
210 05712c37c828 6676016: ParallelOldGC leaks memory jcoomes parents: 142 diff changeset	2059 summary_phase(vmthread_cm, maximum_heap_compaction \|\| max_on_system_gc);
0 a61af66fc99e Initial load duke parents: diff changeset	2060
a61af66fc99e Initial load duke parents: diff changeset	2061 COMPILER2_PRESENT(assert(DerivedPointerTable::is_active(), "Sanity"));
a61af66fc99e Initial load duke parents: diff changeset	2062 COMPILER2_PRESENT(DerivedPointerTable::set_active(false));
a61af66fc99e Initial load duke parents: diff changeset	2063
a61af66fc99e Initial load duke parents: diff changeset	2064 // adjust_roots() updates Universe::_intArrayKlassObj which is
a61af66fc99e Initial load duke parents: diff changeset	2065 // needed by the compaction for filling holes in the dense prefix.
a61af66fc99e Initial load duke parents: diff changeset	2066 adjust_roots();
a61af66fc99e Initial load duke parents: diff changeset	2067
a61af66fc99e Initial load duke parents: diff changeset	2068 compaction_start.update();
a61af66fc99e Initial load duke parents: diff changeset	2069 // Does the perm gen always have to be done serially because
a61af66fc99e Initial load duke parents: diff changeset	2070 // klasses are used in the update of an object?
210 05712c37c828 6676016: ParallelOldGC leaks memory jcoomes parents: 142 diff changeset	2071 compact_perm(vmthread_cm);
0 a61af66fc99e Initial load duke parents: diff changeset	2072
a61af66fc99e Initial load duke parents: diff changeset	2073 if (UseParallelOldGCCompacting) {
a61af66fc99e Initial load duke parents: diff changeset	2074 compact();
a61af66fc99e Initial load duke parents: diff changeset	2075 } else {
210 05712c37c828 6676016: ParallelOldGC leaks memory jcoomes parents: 142 diff changeset	2076 compact_serial(vmthread_cm);
0 a61af66fc99e Initial load duke parents: diff changeset	2077 }
a61af66fc99e Initial load duke parents: diff changeset	2078
a61af66fc99e Initial load duke parents: diff changeset	2079 // Reset the mark bitmap, summary data, and do other bookkeeping. Must be
a61af66fc99e Initial load duke parents: diff changeset	2080 // done before resizing.
a61af66fc99e Initial load duke parents: diff changeset	2081 post_compact();
a61af66fc99e Initial load duke parents: diff changeset	2082
a61af66fc99e Initial load duke parents: diff changeset	2083 // Let the size policy know we're done
a61af66fc99e Initial load duke parents: diff changeset	2084 size_policy->major_collection_end(old_gen->used_in_bytes(), gc_cause);
a61af66fc99e Initial load duke parents: diff changeset	2085
a61af66fc99e Initial load duke parents: diff changeset	2086 if (UseAdaptiveSizePolicy) {
a61af66fc99e Initial load duke parents: diff changeset	2087 if (PrintAdaptiveSizePolicy) {
a61af66fc99e Initial load duke parents: diff changeset	2088 gclog_or_tty->print("AdaptiveSizeStart: ");
a61af66fc99e Initial load duke parents: diff changeset	2089 gclog_or_tty->stamp();
a61af66fc99e Initial load duke parents: diff changeset	2090 gclog_or_tty->print_cr(" collection: %d ",
a61af66fc99e Initial load duke parents: diff changeset	2091 heap->total_collections());
a61af66fc99e Initial load duke parents: diff changeset	2092 if (Verbose) {
a61af66fc99e Initial load duke parents: diff changeset	2093 gclog_or_tty->print("old_gen_capacity: %d young_gen_capacity: %d"
a61af66fc99e Initial load duke parents: diff changeset	2094 " perm_gen_capacity: %d ",
a61af66fc99e Initial load duke parents: diff changeset	2095 old_gen->capacity_in_bytes(), young_gen->capacity_in_bytes(),
a61af66fc99e Initial load duke parents: diff changeset	2096 perm_gen->capacity_in_bytes());
a61af66fc99e Initial load duke parents: diff changeset	2097 }
a61af66fc99e Initial load duke parents: diff changeset	2098 }
a61af66fc99e Initial load duke parents: diff changeset	2099
a61af66fc99e Initial load duke parents: diff changeset	2100 // Don't check if the size_policy is ready here. Let
a61af66fc99e Initial load duke parents: diff changeset	2101 // the size_policy check that internally.
a61af66fc99e Initial load duke parents: diff changeset	2102 if (UseAdaptiveGenerationSizePolicyAtMajorCollection &&
a61af66fc99e Initial load duke parents: diff changeset	2103 ((gc_cause != GCCause::_java_lang_system_gc) \|\|
a61af66fc99e Initial load duke parents: diff changeset	2104 UseAdaptiveSizePolicyWithSystemGC)) {
a61af66fc99e Initial load duke parents: diff changeset	2105 // Calculate optimal free space amounts
a61af66fc99e Initial load duke parents: diff changeset	2106 assert(young_gen->max_size() >
a61af66fc99e Initial load duke parents: diff changeset	2107 young_gen->from_space()->capacity_in_bytes() +
a61af66fc99e Initial load duke parents: diff changeset	2108 young_gen->to_space()->capacity_in_bytes(),
a61af66fc99e Initial load duke parents: diff changeset	2109 "Sizes of space in young gen are out-of-bounds");
a61af66fc99e Initial load duke parents: diff changeset	2110 size_t max_eden_size = young_gen->max_size() -
a61af66fc99e Initial load duke parents: diff changeset	2111 young_gen->from_space()->capacity_in_bytes() -
a61af66fc99e Initial load duke parents: diff changeset	2112 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	2113 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	2114 young_gen->used_in_bytes(),
12eea04c8b06 6672698: mangle_unused_area() should not remangle the entire heap at each collection. jmasa parents: 210 diff changeset	2115 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	2116 old_gen->used_in_bytes(),
12eea04c8b06 6672698: mangle_unused_area() should not remangle the entire heap at each collection. jmasa parents: 210 diff changeset	2117 perm_gen->used_in_bytes(),
12eea04c8b06 6672698: mangle_unused_area() should not remangle the entire heap at each collection. jmasa parents: 210 diff changeset	2118 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	2119 old_gen->max_gen_size(),
12eea04c8b06 6672698: mangle_unused_area() should not remangle the entire heap at each collection. jmasa parents: 210 diff changeset	2120 max_eden_size,
12eea04c8b06 6672698: mangle_unused_area() should not remangle the entire heap at each collection. jmasa parents: 210 diff changeset	2121 true /* full gc*/,
1387 0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 1311 diff changeset	2122 gc_cause,
0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 1311 diff changeset	2123 heap->collector_policy());
263 12eea04c8b06 6672698: mangle_unused_area() should not remangle the entire heap at each collection. jmasa parents: 210 diff changeset	2124
12eea04c8b06 6672698: mangle_unused_area() should not remangle the entire heap at each collection. jmasa parents: 210 diff changeset	2125 heap->resize_old_gen(
12eea04c8b06 6672698: mangle_unused_area() should not remangle the entire heap at each collection. jmasa parents: 210 diff changeset	2126 size_policy->calculated_old_free_size_in_bytes());
0 a61af66fc99e Initial load duke parents: diff changeset	2127
a61af66fc99e Initial load duke parents: diff changeset	2128 // Don't resize the young generation at an major collection. A
a61af66fc99e Initial load duke parents: diff changeset	2129 // desired young generation size may have been calculated but
a61af66fc99e Initial load duke parents: diff changeset	2130 // resizing the young generation complicates the code because the
a61af66fc99e Initial load duke parents: diff changeset	2131 // resizing of the old generation may have moved the boundary
a61af66fc99e Initial load duke parents: diff changeset	2132 // between the young generation and the old generation. Let the
a61af66fc99e Initial load duke parents: diff changeset	2133 // young generation resizing happen at the minor collections.
a61af66fc99e Initial load duke parents: diff changeset	2134 }
a61af66fc99e Initial load duke parents: diff changeset	2135 if (PrintAdaptiveSizePolicy) {
a61af66fc99e Initial load duke parents: diff changeset	2136 gclog_or_tty->print_cr("AdaptiveSizeStop: collection: %d ",
a61af66fc99e Initial load duke parents: diff changeset	2137 heap->total_collections());
a61af66fc99e Initial load duke parents: diff changeset	2138 }
a61af66fc99e Initial load duke parents: diff changeset	2139 }
a61af66fc99e Initial load duke parents: diff changeset	2140
a61af66fc99e Initial load duke parents: diff changeset	2141 if (UsePerfData) {
a61af66fc99e Initial load duke parents: diff changeset	2142 PSGCAdaptivePolicyCounters* const counters = heap->gc_policy_counters();
a61af66fc99e Initial load duke parents: diff changeset	2143 counters->update_counters();
a61af66fc99e Initial load duke parents: diff changeset	2144 counters->update_old_capacity(old_gen->capacity_in_bytes());
a61af66fc99e Initial load duke parents: diff changeset	2145 counters->update_young_capacity(young_gen->capacity_in_bytes());
a61af66fc99e Initial load duke parents: diff changeset	2146 }
a61af66fc99e Initial load duke parents: diff changeset	2147
a61af66fc99e Initial load duke parents: diff changeset	2148 heap->resize_all_tlabs();
a61af66fc99e Initial load duke parents: diff changeset	2149
a61af66fc99e Initial load duke parents: diff changeset	2150 // We collected the perm gen, so we'll resize it here.
a61af66fc99e Initial load duke parents: diff changeset	2151 perm_gen->compute_new_size(pre_gc_values.perm_gen_used());
a61af66fc99e Initial load duke parents: diff changeset	2152
a61af66fc99e Initial load duke parents: diff changeset	2153 if (TraceGen1Time) accumulated_time()->stop();
a61af66fc99e Initial load duke parents: diff changeset	2154
a61af66fc99e Initial load duke parents: diff changeset	2155 if (PrintGC) {
a61af66fc99e Initial load duke parents: diff changeset	2156 if (PrintGCDetails) {
a61af66fc99e Initial load duke parents: diff changeset	2157 // No GC timestamp here. This is after GC so it would be confusing.
a61af66fc99e Initial load duke parents: diff changeset	2158 young_gen->print_used_change(pre_gc_values.young_gen_used());
a61af66fc99e Initial load duke parents: diff changeset	2159 old_gen->print_used_change(pre_gc_values.old_gen_used());
a61af66fc99e Initial load duke parents: diff changeset	2160 heap->print_heap_change(pre_gc_values.heap_used());
a61af66fc99e Initial load duke parents: diff changeset	2161 // Print perm gen last (print_heap_change() excludes the perm gen).
a61af66fc99e Initial load duke parents: diff changeset	2162 perm_gen->print_used_change(pre_gc_values.perm_gen_used());
a61af66fc99e Initial load duke parents: diff changeset	2163 } else {
a61af66fc99e Initial load duke parents: diff changeset	2164 heap->print_heap_change(pre_gc_values.heap_used());
a61af66fc99e Initial load duke parents: diff changeset	2165 }
a61af66fc99e Initial load duke parents: diff changeset	2166 }
a61af66fc99e Initial load duke parents: diff changeset	2167
a61af66fc99e Initial load duke parents: diff changeset	2168 // Track memory usage and detect low memory
a61af66fc99e Initial load duke parents: diff changeset	2169 MemoryService::track_memory_usage();
a61af66fc99e Initial load duke parents: diff changeset	2170 heap->update_counters();
a61af66fc99e Initial load duke parents: diff changeset	2171 }
a61af66fc99e Initial load duke parents: diff changeset	2172
1836 894b1d7c7e01 6423256: GC stacks should use a better data structure jcoomes parents: 1833 diff changeset	2173 #ifdef ASSERT
894b1d7c7e01 6423256: GC stacks should use a better data structure jcoomes parents: 1833 diff changeset	2174 for (size_t i = 0; i < ParallelGCThreads + 1; ++i) {
894b1d7c7e01 6423256: GC stacks should use a better data structure jcoomes parents: 1833 diff changeset	2175 ParCompactionManager* const cm =
894b1d7c7e01 6423256: GC stacks should use a better data structure jcoomes parents: 1833 diff changeset	2176 ParCompactionManager::manager_array(int(i));
894b1d7c7e01 6423256: GC stacks should use a better data structure jcoomes parents: 1833 diff changeset	2177 assert(cm->marking_stack()->is_empty(), "should be empty");
894b1d7c7e01 6423256: GC stacks should use a better data structure jcoomes parents: 1833 diff changeset	2178 assert(cm->region_stack()->is_empty(), "should be empty");
894b1d7c7e01 6423256: GC stacks should use a better data structure jcoomes parents: 1833 diff changeset	2179 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	2180 }
894b1d7c7e01 6423256: GC stacks should use a better data structure jcoomes parents: 1833 diff changeset	2181 #endif // ASSERT
894b1d7c7e01 6423256: GC stacks should use a better data structure jcoomes parents: 1833 diff changeset	2182
0 a61af66fc99e Initial load duke parents: diff changeset	2183 if (VerifyAfterGC && heap->total_collections() >= VerifyGCStartAt) {
a61af66fc99e Initial load duke parents: diff changeset	2184 HandleMark hm; // Discard invalid handles created during verification
a61af66fc99e Initial load duke parents: diff changeset	2185 gclog_or_tty->print(" VerifyAfterGC:");
a61af66fc99e Initial load duke parents: diff changeset	2186 Universe::verify(false);
a61af66fc99e Initial load duke parents: diff changeset	2187 }
a61af66fc99e Initial load duke parents: diff changeset	2188
a61af66fc99e Initial load duke parents: diff changeset	2189 // Re-verify object start arrays
a61af66fc99e Initial load duke parents: diff changeset	2190 if (VerifyObjectStartArray &&
a61af66fc99e Initial load duke parents: diff changeset	2191 VerifyAfterGC) {
a61af66fc99e Initial load duke parents: diff changeset	2192 old_gen->verify_object_start_array();
a61af66fc99e Initial load duke parents: diff changeset	2193 perm_gen->verify_object_start_array();
a61af66fc99e Initial load duke parents: diff changeset	2194 }
a61af66fc99e Initial load duke parents: diff changeset	2195
263 12eea04c8b06 6672698: mangle_unused_area() should not remangle the entire heap at each collection. jmasa parents: 210 diff changeset	2196 if (ZapUnusedHeapArea) {
12eea04c8b06 6672698: mangle_unused_area() should not remangle the entire heap at each collection. jmasa parents: 210 diff changeset	2197 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	2198 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	2199 }
12eea04c8b06 6672698: mangle_unused_area() should not remangle the entire heap at each collection. jmasa parents: 210 diff changeset	2200
0 a61af66fc99e Initial load duke parents: diff changeset	2201 NOT_PRODUCT(ref_processor()->verify_no_references_recorded());
a61af66fc99e Initial load duke parents: diff changeset	2202
a61af66fc99e Initial load duke parents: diff changeset	2203 collection_exit.update();
a61af66fc99e Initial load duke parents: diff changeset	2204
a61af66fc99e Initial load duke parents: diff changeset	2205 if (PrintHeapAtGC) {
a61af66fc99e Initial load duke parents: diff changeset	2206 Universe::print_heap_after_gc();
a61af66fc99e Initial load duke parents: diff changeset	2207 }
a61af66fc99e Initial load duke parents: diff changeset	2208 if (PrintGCTaskTimeStamps) {
a61af66fc99e Initial load duke parents: diff changeset	2209 gclog_or_tty->print_cr("VM-Thread " INT64_FORMAT " " INT64_FORMAT " "
a61af66fc99e Initial load duke parents: diff changeset	2210 INT64_FORMAT,
a61af66fc99e Initial load duke parents: diff changeset	2211 marking_start.ticks(), compaction_start.ticks(),
a61af66fc99e Initial load duke parents: diff changeset	2212 collection_exit.ticks());
a61af66fc99e Initial load duke parents: diff changeset	2213 gc_task_manager()->print_task_time_stamps();
a61af66fc99e Initial load duke parents: diff changeset	2214 }
546 05c6d52fa7a9 6690928: Use spinning in combination with yields for workstealing termination. jmasa parents: 496 diff changeset	2215
615 c6c601a0f2d6 6797870: Add -XX:+{HeapDump,PrintClassHistogram}{Before,After}FullGC ysr parents: 546 diff changeset	2216 heap->post_full_gc_dump();
c6c601a0f2d6 6797870: Add -XX:+{HeapDump,PrintClassHistogram}{Before,After}FullGC ysr parents: 546 diff changeset	2217
546 05c6d52fa7a9 6690928: Use spinning in combination with yields for workstealing termination. jmasa parents: 496 diff changeset	2218 #ifdef TRACESPINNING
05c6d52fa7a9 6690928: Use spinning in combination with yields for workstealing termination. jmasa parents: 496 diff changeset	2219 ParallelTaskTerminator::print_termination_counts();
05c6d52fa7a9 6690928: Use spinning in combination with yields for workstealing termination. jmasa parents: 496 diff changeset	2220 #endif
0 a61af66fc99e Initial load duke parents: diff changeset	2221 }
a61af66fc99e Initial load duke parents: diff changeset	2222
a61af66fc99e Initial load duke parents: diff changeset	2223 bool PSParallelCompact::absorb_live_data_from_eden(PSAdaptiveSizePolicy* size_policy,
a61af66fc99e Initial load duke parents: diff changeset	2224 PSYoungGen* young_gen,
a61af66fc99e Initial load duke parents: diff changeset	2225 PSOldGen* old_gen) {
a61af66fc99e Initial load duke parents: diff changeset	2226 MutableSpace* const eden_space = young_gen->eden_space();
a61af66fc99e Initial load duke parents: diff changeset	2227 assert(!eden_space->is_empty(), "eden must be non-empty");
a61af66fc99e Initial load duke parents: diff changeset	2228 assert(young_gen->virtual_space()->alignment() ==
a61af66fc99e Initial load duke parents: diff changeset	2229 old_gen->virtual_space()->alignment(), "alignments do not match");
a61af66fc99e Initial load duke parents: diff changeset	2230
a61af66fc99e Initial load duke parents: diff changeset	2231 if (!(UseAdaptiveSizePolicy && UseAdaptiveGCBoundary)) {
a61af66fc99e Initial load duke parents: diff changeset	2232 return false;
a61af66fc99e Initial load duke parents: diff changeset	2233 }
a61af66fc99e Initial load duke parents: diff changeset	2234
a61af66fc99e Initial load duke parents: diff changeset	2235 // Both generations must be completely committed.
a61af66fc99e Initial load duke parents: diff changeset	2236 if (young_gen->virtual_space()->uncommitted_size() != 0) {
a61af66fc99e Initial load duke parents: diff changeset	2237 return false;
a61af66fc99e Initial load duke parents: diff changeset	2238 }
a61af66fc99e Initial load duke parents: diff changeset	2239 if (old_gen->virtual_space()->uncommitted_size() != 0) {
a61af66fc99e Initial load duke parents: diff changeset	2240 return false;
a61af66fc99e Initial load duke parents: diff changeset	2241 }
a61af66fc99e Initial load duke parents: diff changeset	2242
a61af66fc99e Initial load duke parents: diff changeset	2243 // Figure out how much to take from eden. Include the average amount promoted
a61af66fc99e Initial load duke parents: diff changeset	2244 // in the total; otherwise the next young gen GC will simply bail out to a
a61af66fc99e Initial load duke parents: diff changeset	2245 // full GC.
a61af66fc99e Initial load duke parents: diff changeset	2246 const size_t alignment = old_gen->virtual_space()->alignment();
a61af66fc99e Initial load duke parents: diff changeset	2247 const size_t eden_used = eden_space->used_in_bytes();
a61af66fc99e Initial load duke parents: diff changeset	2248 const size_t promoted = (size_t)size_policy->avg_promoted()->padded_average();
a61af66fc99e Initial load duke parents: diff changeset	2249 const size_t absorb_size = align_size_up(eden_used + promoted, alignment);
a61af66fc99e Initial load duke parents: diff changeset	2250 const size_t eden_capacity = eden_space->capacity_in_bytes();
a61af66fc99e Initial load duke parents: diff changeset	2251
a61af66fc99e Initial load duke parents: diff changeset	2252 if (absorb_size >= eden_capacity) {
a61af66fc99e Initial load duke parents: diff changeset	2253 return false; // Must leave some space in eden.
a61af66fc99e Initial load duke parents: diff changeset	2254 }
a61af66fc99e Initial load duke parents: diff changeset	2255
a61af66fc99e Initial load duke parents: diff changeset	2256 const size_t new_young_size = young_gen->capacity_in_bytes() - absorb_size;
a61af66fc99e Initial load duke parents: diff changeset	2257 if (new_young_size < young_gen->min_gen_size()) {
a61af66fc99e Initial load duke parents: diff changeset	2258 return false; // Respect young gen minimum size.
a61af66fc99e Initial load duke parents: diff changeset	2259 }
a61af66fc99e Initial load duke parents: diff changeset	2260
a61af66fc99e Initial load duke parents: diff changeset	2261 if (TraceAdaptiveGCBoundary && Verbose) {
a61af66fc99e Initial load duke parents: diff changeset	2262 gclog_or_tty->print(" absorbing " SIZE_FORMAT "K: "
a61af66fc99e Initial load duke parents: diff changeset	2263 "eden " SIZE_FORMAT "K->" SIZE_FORMAT "K "
a61af66fc99e Initial load duke parents: diff changeset	2264 "from " SIZE_FORMAT "K, to " SIZE_FORMAT "K "
a61af66fc99e Initial load duke parents: diff changeset	2265 "young_gen " SIZE_FORMAT "K->" SIZE_FORMAT "K ",
a61af66fc99e Initial load duke parents: diff changeset	2266 absorb_size / K,
a61af66fc99e Initial load duke parents: diff changeset	2267 eden_capacity / K, (eden_capacity - absorb_size) / K,
a61af66fc99e Initial load duke parents: diff changeset	2268 young_gen->from_space()->used_in_bytes() / K,
a61af66fc99e Initial load duke parents: diff changeset	2269 young_gen->to_space()->used_in_bytes() / K,
a61af66fc99e Initial load duke parents: diff changeset	2270 young_gen->capacity_in_bytes() / K, new_young_size / K);
a61af66fc99e Initial load duke parents: diff changeset	2271 }
a61af66fc99e Initial load duke parents: diff changeset	2272
a61af66fc99e Initial load duke parents: diff changeset	2273 // Fill the unused part of the old gen.
a61af66fc99e Initial load duke parents: diff changeset	2274 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	2275 HeapWord* const unused_start = old_space->top();
7d7a7c599c17 6578152: fill_region_with_object has usability and safety issues jcoomes parents: 457 diff changeset	2276 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	2277
7d7a7c599c17 6578152: fill_region_with_object has usability and safety issues jcoomes parents: 457 diff changeset	2278 if (unused_words > 0) {
7d7a7c599c17 6578152: fill_region_with_object has usability and safety issues jcoomes parents: 457 diff changeset	2279 if (unused_words < CollectedHeap::min_fill_size()) {
7d7a7c599c17 6578152: fill_region_with_object has usability and safety issues jcoomes parents: 457 diff changeset	2280 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	2281 }
7d7a7c599c17 6578152: fill_region_with_object has usability and safety issues jcoomes parents: 457 diff changeset	2282 CollectedHeap::fill_with_objects(unused_start, unused_words);
0 a61af66fc99e Initial load duke parents: diff changeset	2283 }
a61af66fc99e Initial load duke parents: diff changeset	2284
a61af66fc99e Initial load duke parents: diff changeset	2285 // Take the live data from eden and set both top and end in the old gen to
a61af66fc99e Initial load duke parents: diff changeset	2286 // eden top. (Need to set end because reset_after_change() mangles the region
a61af66fc99e Initial load duke parents: diff changeset	2287 // from end to virtual_space->high() in debug builds).
a61af66fc99e Initial load duke parents: diff changeset	2288 HeapWord* const new_top = eden_space->top();
a61af66fc99e Initial load duke parents: diff changeset	2289 old_gen->virtual_space()->expand_into(young_gen->virtual_space(),
a61af66fc99e Initial load duke parents: diff changeset	2290 absorb_size);
a61af66fc99e Initial load duke parents: diff changeset	2291 young_gen->reset_after_change();
a61af66fc99e Initial load duke parents: diff changeset	2292 old_space->set_top(new_top);
a61af66fc99e Initial load duke parents: diff changeset	2293 old_space->set_end(new_top);
a61af66fc99e Initial load duke parents: diff changeset	2294 old_gen->reset_after_change();
a61af66fc99e Initial load duke parents: diff changeset	2295
a61af66fc99e Initial load duke parents: diff changeset	2296 // Update the object start array for the filler object and the data from eden.
a61af66fc99e Initial load duke parents: diff changeset	2297 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	2298 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	2299 start_array->allocate_block(p);
0 a61af66fc99e Initial load duke parents: diff changeset	2300 }
a61af66fc99e Initial load duke parents: diff changeset	2301
a61af66fc99e Initial load duke parents: diff changeset	2302 // Could update the promoted average here, but it is not typically updated at
a61af66fc99e Initial load duke parents: diff changeset	2303 // full GCs and the value to use is unclear. Something like
a61af66fc99e Initial load duke parents: diff changeset	2304 //
a61af66fc99e Initial load duke parents: diff changeset	2305 // cur_promoted_avg + absorb_size / number_of_scavenges_since_last_full_gc.
a61af66fc99e Initial load duke parents: diff changeset	2306
a61af66fc99e Initial load duke parents: diff changeset	2307 size_policy->set_bytes_absorbed_from_eden(absorb_size);
a61af66fc99e Initial load duke parents: diff changeset	2308 return true;
a61af66fc99e Initial load duke parents: diff changeset	2309 }
a61af66fc99e Initial load duke parents: diff changeset	2310
a61af66fc99e Initial load duke parents: diff changeset	2311 GCTaskManager* const PSParallelCompact::gc_task_manager() {
a61af66fc99e Initial load duke parents: diff changeset	2312 assert(ParallelScavengeHeap::gc_task_manager() != NULL,
a61af66fc99e Initial load duke parents: diff changeset	2313 "shouldn't return NULL");
a61af66fc99e Initial load duke parents: diff changeset	2314 return ParallelScavengeHeap::gc_task_manager();
a61af66fc99e Initial load duke parents: diff changeset	2315 }
a61af66fc99e Initial load duke parents: diff changeset	2316
a61af66fc99e Initial load duke parents: diff changeset	2317 void PSParallelCompact::marking_phase(ParCompactionManager* cm,
a61af66fc99e Initial load duke parents: diff changeset	2318 bool maximum_heap_compaction) {
a61af66fc99e Initial load duke parents: diff changeset	2319 // Recursively traverse all live objects and mark them
a61af66fc99e Initial load duke parents: diff changeset	2320 EventMark m("1 mark object");
a61af66fc99e Initial load duke parents: diff changeset	2321 TraceTime tm("marking phase", print_phases(), true, gclog_or_tty);
a61af66fc99e Initial load duke parents: diff changeset	2322
a61af66fc99e Initial load duke parents: diff changeset	2323 ParallelScavengeHeap* heap = gc_heap();
a61af66fc99e Initial load duke parents: diff changeset	2324 uint parallel_gc_threads = heap->gc_task_manager()->workers();
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2325 TaskQueueSetSuper* qset = ParCompactionManager::region_array();
0 a61af66fc99e Initial load duke parents: diff changeset	2326 ParallelTaskTerminator terminator(parallel_gc_threads, qset);
a61af66fc99e Initial load duke parents: diff changeset	2327
a61af66fc99e Initial load duke parents: diff changeset	2328 PSParallelCompact::MarkAndPushClosure mark_and_push_closure(cm);
a61af66fc99e Initial load duke parents: diff changeset	2329 PSParallelCompact::FollowStackClosure follow_stack_closure(cm);
a61af66fc99e Initial load duke parents: diff changeset	2330
a61af66fc99e Initial load duke parents: diff changeset	2331 {
a61af66fc99e Initial load duke parents: diff changeset	2332 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	2333 ParallelScavengeHeap::ParStrongRootsScope psrs;
0 a61af66fc99e Initial load duke parents: diff changeset	2334
a61af66fc99e Initial load duke parents: diff changeset	2335 GCTaskQueue* q = GCTaskQueue::create();
a61af66fc99e Initial load duke parents: diff changeset	2336
a61af66fc99e Initial load duke parents: diff changeset	2337 q->enqueue(new MarkFromRootsTask(MarkFromRootsTask::universe));
a61af66fc99e Initial load duke parents: diff changeset	2338 q->enqueue(new MarkFromRootsTask(MarkFromRootsTask::jni_handles));
a61af66fc99e Initial load duke parents: diff changeset	2339 // We scan the thread roots in parallel
a61af66fc99e Initial load duke parents: diff changeset	2340 Threads::create_thread_roots_marking_tasks(q);
a61af66fc99e Initial load duke parents: diff changeset	2341 q->enqueue(new MarkFromRootsTask(MarkFromRootsTask::object_synchronizer));
a61af66fc99e Initial load duke parents: diff changeset	2342 q->enqueue(new MarkFromRootsTask(MarkFromRootsTask::flat_profiler));
a61af66fc99e Initial load duke parents: diff changeset	2343 q->enqueue(new MarkFromRootsTask(MarkFromRootsTask::management));
a61af66fc99e Initial load duke parents: diff changeset	2344 q->enqueue(new MarkFromRootsTask(MarkFromRootsTask::system_dictionary));
a61af66fc99e Initial load duke parents: diff changeset	2345 q->enqueue(new MarkFromRootsTask(MarkFromRootsTask::jvmti));
a61af66fc99e Initial load duke parents: diff changeset	2346 q->enqueue(new MarkFromRootsTask(MarkFromRootsTask::vm_symbols));
989 148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 696 diff changeset	2347 q->enqueue(new MarkFromRootsTask(MarkFromRootsTask::code_cache));
0 a61af66fc99e Initial load duke parents: diff changeset	2348
a61af66fc99e Initial load duke parents: diff changeset	2349 if (parallel_gc_threads > 1) {
a61af66fc99e Initial load duke parents: diff changeset	2350 for (uint j = 0; j < parallel_gc_threads; j++) {
a61af66fc99e Initial load duke parents: diff changeset	2351 q->enqueue(new StealMarkingTask(&terminator));
a61af66fc99e Initial load duke parents: diff changeset	2352 }
a61af66fc99e Initial load duke parents: diff changeset	2353 }
a61af66fc99e Initial load duke parents: diff changeset	2354
a61af66fc99e Initial load duke parents: diff changeset	2355 WaitForBarrierGCTask* fin = WaitForBarrierGCTask::create();
a61af66fc99e Initial load duke parents: diff changeset	2356 q->enqueue(fin);
a61af66fc99e Initial load duke parents: diff changeset	2357
a61af66fc99e Initial load duke parents: diff changeset	2358 gc_task_manager()->add_list(q);
a61af66fc99e Initial load duke parents: diff changeset	2359
a61af66fc99e Initial load duke parents: diff changeset	2360 fin->wait_for();
a61af66fc99e Initial load duke parents: diff changeset	2361
a61af66fc99e Initial load duke parents: diff changeset	2362 // We have to release the barrier tasks!
a61af66fc99e Initial load duke parents: diff changeset	2363 WaitForBarrierGCTask::destroy(fin);
a61af66fc99e Initial load duke parents: diff changeset	2364 }
a61af66fc99e Initial load duke parents: diff changeset	2365
a61af66fc99e Initial load duke parents: diff changeset	2366 // Process reference objects found during marking
a61af66fc99e Initial load duke parents: diff changeset	2367 {
a61af66fc99e Initial load duke parents: diff changeset	2368 TraceTime tm_r("reference processing", print_phases(), true, gclog_or_tty);
a61af66fc99e Initial load duke parents: diff changeset	2369 if (ref_processor()->processing_is_mt()) {
a61af66fc99e Initial load duke parents: diff changeset	2370 RefProcTaskExecutor task_executor;
a61af66fc99e Initial load duke parents: diff changeset	2371 ref_processor()->process_discovered_references(
453 c96030fff130 6684579: SoftReference processing can be made more efficient ysr parents: 376 diff changeset	2372 is_alive_closure(), &mark_and_push_closure, &follow_stack_closure,
c96030fff130 6684579: SoftReference processing can be made more efficient ysr parents: 376 diff changeset	2373 &task_executor);
0 a61af66fc99e Initial load duke parents: diff changeset	2374 } else {
a61af66fc99e Initial load duke parents: diff changeset	2375 ref_processor()->process_discovered_references(
453 c96030fff130 6684579: SoftReference processing can be made more efficient ysr parents: 376 diff changeset	2376 is_alive_closure(), &mark_and_push_closure, &follow_stack_closure, NULL);
0 a61af66fc99e Initial load duke parents: diff changeset	2377 }
a61af66fc99e Initial load duke parents: diff changeset	2378 }
a61af66fc99e Initial load duke parents: diff changeset	2379
a61af66fc99e Initial load duke parents: diff changeset	2380 TraceTime tm_c("class unloading", print_phases(), true, gclog_or_tty);
a61af66fc99e Initial load duke parents: diff changeset	2381 // Follow system dictionary roots and unload classes.
a61af66fc99e Initial load duke parents: diff changeset	2382 bool purged_class = SystemDictionary::do_unloading(is_alive_closure());
a61af66fc99e Initial load duke parents: diff changeset	2383
a61af66fc99e Initial load duke parents: diff changeset	2384 // Follow code cache roots.
a61af66fc99e Initial load duke parents: diff changeset	2385 CodeCache::do_unloading(is_alive_closure(), &mark_and_push_closure,
a61af66fc99e Initial load duke parents: diff changeset	2386 purged_class);
1311 2a1472c30599 4396719: Mark Sweep stack overflow on deeply nested Object arrays jcoomes parents: 997 diff changeset	2387 cm->follow_marking_stacks(); // Flush marking stack.
0 a61af66fc99e Initial load duke parents: diff changeset	2388
a61af66fc99e Initial load duke parents: diff changeset	2389 // Update subklass/sibling/implementor links of live klasses
a61af66fc99e Initial load duke parents: diff changeset	2390 // revisit_klass_stack is used in follow_weak_klass_links().
941 8b46c4d82093 4957990: Perm heap bloat in JVM ysr parents: 696 diff changeset	2391 follow_weak_klass_links();
8b46c4d82093 4957990: Perm heap bloat in JVM ysr parents: 696 diff changeset	2392
8b46c4d82093 4957990: Perm heap bloat in JVM ysr parents: 696 diff changeset	2393 // Revisit memoized MDO's and clear any unmarked weak refs
8b46c4d82093 4957990: Perm heap bloat in JVM ysr parents: 696 diff changeset	2394 follow_mdo_weak_refs();
0 a61af66fc99e Initial load duke parents: diff changeset	2395
a61af66fc99e Initial load duke parents: diff changeset	2396 // Visit symbol and interned string tables and delete unmarked oops
a61af66fc99e Initial load duke parents: diff changeset	2397 SymbolTable::unlink(is_alive_closure());
a61af66fc99e Initial load duke parents: diff changeset	2398 StringTable::unlink(is_alive_closure());
a61af66fc99e Initial load duke parents: diff changeset	2399
1311 2a1472c30599 4396719: Mark Sweep stack overflow on deeply nested Object arrays jcoomes parents: 997 diff changeset	2400 assert(cm->marking_stacks_empty(), "marking stacks should be empty");
0 a61af66fc99e Initial load duke parents: diff changeset	2401 }
a61af66fc99e Initial load duke parents: diff changeset	2402
a61af66fc99e Initial load duke parents: diff changeset	2403 // This should be moved to the shared markSweep code!
a61af66fc99e Initial load duke parents: diff changeset	2404 class PSAlwaysTrueClosure: public BoolObjectClosure {
a61af66fc99e Initial load duke parents: diff changeset	2405 public:
a61af66fc99e Initial load duke parents: diff changeset	2406 void do_object(oop p) { ShouldNotReachHere(); }
a61af66fc99e Initial load duke parents: diff changeset	2407 bool do_object_b(oop p) { return true; }
a61af66fc99e Initial load duke parents: diff changeset	2408 };
a61af66fc99e Initial load duke parents: diff changeset	2409 static PSAlwaysTrueClosure always_true;
a61af66fc99e Initial load duke parents: diff changeset	2410
a61af66fc99e Initial load duke parents: diff changeset	2411 void PSParallelCompact::adjust_roots() {
a61af66fc99e Initial load duke parents: diff changeset	2412 // Adjust the pointers to reflect the new locations
a61af66fc99e Initial load duke parents: diff changeset	2413 EventMark m("3 adjust roots");
a61af66fc99e Initial load duke parents: diff changeset	2414 TraceTime tm("adjust roots", print_phases(), true, gclog_or_tty);
a61af66fc99e Initial load duke parents: diff changeset	2415
a61af66fc99e Initial load duke parents: diff changeset	2416 // General strong roots.
a61af66fc99e Initial load duke parents: diff changeset	2417 Universe::oops_do(adjust_root_pointer_closure());
a61af66fc99e Initial load duke parents: diff changeset	2418 ReferenceProcessor::oops_do(adjust_root_pointer_closure());
a61af66fc99e Initial load duke parents: diff changeset	2419 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	2420 Threads::oops_do(adjust_root_pointer_closure(), NULL);
0 a61af66fc99e Initial load duke parents: diff changeset	2421 ObjectSynchronizer::oops_do(adjust_root_pointer_closure());
a61af66fc99e Initial load duke parents: diff changeset	2422 FlatProfiler::oops_do(adjust_root_pointer_closure());
a61af66fc99e Initial load duke parents: diff changeset	2423 Management::oops_do(adjust_root_pointer_closure());
a61af66fc99e Initial load duke parents: diff changeset	2424 JvmtiExport::oops_do(adjust_root_pointer_closure());
a61af66fc99e Initial load duke parents: diff changeset	2425 // SO_AllClasses
a61af66fc99e Initial load duke parents: diff changeset	2426 SystemDictionary::oops_do(adjust_root_pointer_closure());
a61af66fc99e Initial load duke parents: diff changeset	2427 vmSymbols::oops_do(adjust_root_pointer_closure());
a61af66fc99e Initial load duke parents: diff changeset	2428
a61af66fc99e Initial load duke parents: diff changeset	2429 // Now adjust pointers in remaining weak roots. (All of which should
a61af66fc99e Initial load duke parents: diff changeset	2430 // have been cleared if they pointed to non-surviving objects.)
a61af66fc99e Initial load duke parents: diff changeset	2431 // Global (weak) JNI handles
a61af66fc99e Initial load duke parents: diff changeset	2432 JNIHandles::weak_oops_do(&always_true, adjust_root_pointer_closure());
a61af66fc99e Initial load duke parents: diff changeset	2433
a61af66fc99e Initial load duke parents: diff changeset	2434 CodeCache::oops_do(adjust_pointer_closure());
a61af66fc99e Initial load duke parents: diff changeset	2435 SymbolTable::oops_do(adjust_root_pointer_closure());
a61af66fc99e Initial load duke parents: diff changeset	2436 StringTable::oops_do(adjust_root_pointer_closure());
a61af66fc99e Initial load duke parents: diff changeset	2437 ref_processor()->weak_oops_do(adjust_root_pointer_closure());
a61af66fc99e Initial load duke parents: diff changeset	2438 // Roots were visited so references into the young gen in roots
a61af66fc99e Initial load duke parents: diff changeset	2439 // may have been scanned. Process them also.
a61af66fc99e Initial load duke parents: diff changeset	2440 // Should the reference processor have a span that excludes
a61af66fc99e Initial load duke parents: diff changeset	2441 // young gen objects?
a61af66fc99e Initial load duke parents: diff changeset	2442 PSScavenge::reference_processor()->weak_oops_do(
a61af66fc99e Initial load duke parents: diff changeset	2443 adjust_root_pointer_closure());
a61af66fc99e Initial load duke parents: diff changeset	2444 }
a61af66fc99e Initial load duke parents: diff changeset	2445
a61af66fc99e Initial load duke parents: diff changeset	2446 void PSParallelCompact::compact_perm(ParCompactionManager* cm) {
a61af66fc99e Initial load duke parents: diff changeset	2447 EventMark m("4 compact perm");
a61af66fc99e Initial load duke parents: diff changeset	2448 TraceTime tm("compact perm gen", print_phases(), true, gclog_or_tty);
a61af66fc99e Initial load duke parents: diff changeset	2449 // trace("4");
a61af66fc99e Initial load duke parents: diff changeset	2450
a61af66fc99e Initial load duke parents: diff changeset	2451 gc_heap()->perm_gen()->start_array()->reset();
a61af66fc99e Initial load duke parents: diff changeset	2452 move_and_update(cm, perm_space_id);
a61af66fc99e Initial load duke parents: diff changeset	2453 }
a61af66fc99e Initial load duke parents: diff changeset	2454
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2455 void PSParallelCompact::enqueue_region_draining_tasks(GCTaskQueue* q,
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2456 uint parallel_gc_threads)
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2457 {
0 a61af66fc99e Initial load duke parents: diff changeset	2458 TraceTime tm("drain task setup", print_phases(), true, gclog_or_tty);
a61af66fc99e Initial load duke parents: diff changeset	2459
a61af66fc99e Initial load duke parents: diff changeset	2460 const unsigned int task_count = MAX2(parallel_gc_threads, 1U);
a61af66fc99e Initial load duke parents: diff changeset	2461 for (unsigned int j = 0; j < task_count; j++) {
1833 8b10f48633dc 6984287: Regularize how GC parallel workers are specified. jmasa parents: 1638 diff changeset	2462 q->enqueue(new DrainStacksCompactionTask(j));
0 a61af66fc99e Initial load duke parents: diff changeset	2463 }
a61af66fc99e Initial load duke parents: diff changeset	2464
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2465 // Find all regions that are available (can be filled immediately) and
0 a61af66fc99e Initial load duke parents: diff changeset	2466 // 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	2467 // order (high to low) so the regions will be removed in ascending order.
0 a61af66fc99e Initial load duke parents: diff changeset	2468
a61af66fc99e Initial load duke parents: diff changeset	2469 const ParallelCompactData& sd = PSParallelCompact::summary_data();
a61af66fc99e Initial load duke parents: diff changeset	2470
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2471 size_t fillable_regions = 0; // A count for diagnostic purposes.
0 a61af66fc99e Initial load duke parents: diff changeset	2472 unsigned int which = 0; // The worker thread number.
a61af66fc99e Initial load duke parents: diff changeset	2473
a61af66fc99e Initial load duke parents: diff changeset	2474 for (unsigned int id = to_space_id; id > perm_space_id; --id) {
a61af66fc99e Initial load duke parents: diff changeset	2475 SpaceInfo* const space_info = _space_info + id;
a61af66fc99e Initial load duke parents: diff changeset	2476 MutableSpace* const space = space_info->space();
a61af66fc99e Initial load duke parents: diff changeset	2477 HeapWord* const new_top = space_info->new_top();
a61af66fc99e Initial load duke parents: diff changeset	2478
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2479 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	2480 const size_t end_region =
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2481 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	2482 assert(end_region > 0, "perm gen cannot be empty");
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2483
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2484 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	2485 if (sd.region(cur)->claim_unsafe()) {
0 a61af66fc99e Initial load duke parents: diff changeset	2486 ParCompactionManager* cm = ParCompactionManager::manager_array(which);
1638 b2a00dd3117c 6957084: simplify TaskQueue overflow handling jcoomes parents: 1579 diff changeset	2487 cm->push_region(cur);
0 a61af66fc99e Initial load duke parents: diff changeset	2488
a61af66fc99e Initial load duke parents: diff changeset	2489 if (TraceParallelOldGCCompactionPhase && Verbose) {
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2490 const size_t count_mod_8 = fillable_regions & 7;
0 a61af66fc99e Initial load duke parents: diff changeset	2491 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	2492 gclog_or_tty->print(" " SIZE_FORMAT_W(7), cur);
0 a61af66fc99e Initial load duke parents: diff changeset	2493 if (count_mod_8 == 7) gclog_or_tty->cr();
a61af66fc99e Initial load duke parents: diff changeset	2494 }
a61af66fc99e Initial load duke parents: diff changeset	2495
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2496 NOT_PRODUCT(++fillable_regions;)
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2497
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2498 // Assign regions to threads in round-robin fashion.
0 a61af66fc99e Initial load duke parents: diff changeset	2499 if (++which == task_count) {
a61af66fc99e Initial load duke parents: diff changeset	2500 which = 0;
a61af66fc99e Initial load duke parents: diff changeset	2501 }
a61af66fc99e Initial load duke parents: diff changeset	2502 }
a61af66fc99e Initial load duke parents: diff changeset	2503 }
a61af66fc99e Initial load duke parents: diff changeset	2504 }
a61af66fc99e Initial load duke parents: diff changeset	2505
a61af66fc99e Initial load duke parents: diff changeset	2506 if (TraceParallelOldGCCompactionPhase) {
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2507 if (Verbose && (fillable_regions & 7) != 0) gclog_or_tty->cr();
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2508 gclog_or_tty->print_cr("%u initially fillable regions", fillable_regions);
0 a61af66fc99e Initial load duke parents: diff changeset	2509 }
a61af66fc99e Initial load duke parents: diff changeset	2510 }
a61af66fc99e Initial load duke parents: diff changeset	2511
a61af66fc99e Initial load duke parents: diff changeset	2512 #define PAR_OLD_DENSE_PREFIX_OVER_PARTITIONING 4
a61af66fc99e Initial load duke parents: diff changeset	2513
a61af66fc99e Initial load duke parents: diff changeset	2514 void PSParallelCompact::enqueue_dense_prefix_tasks(GCTaskQueue* q,
a61af66fc99e Initial load duke parents: diff changeset	2515 uint parallel_gc_threads) {
a61af66fc99e Initial load duke parents: diff changeset	2516 TraceTime tm("dense prefix task setup", print_phases(), true, gclog_or_tty);
a61af66fc99e Initial load duke parents: diff changeset	2517
a61af66fc99e Initial load duke parents: diff changeset	2518 ParallelCompactData& sd = PSParallelCompact::summary_data();
a61af66fc99e Initial load duke parents: diff changeset	2519
a61af66fc99e Initial load duke parents: diff changeset	2520 // Iterate over all the spaces adding tasks for updating
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2521 // regions in the dense prefix. Assume that 1 gc thread
0 a61af66fc99e Initial load duke parents: diff changeset	2522 // will work on opening the gaps and the remaining gc threads
a61af66fc99e Initial load duke parents: diff changeset	2523 // will work on the dense prefix.
482 7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	2524 unsigned int space_id;
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	2525 for (space_id = old_space_id; space_id < last_space_id; ++ space_id) {
0 a61af66fc99e Initial load duke parents: diff changeset	2526 HeapWord* const dense_prefix_end = _space_info[space_id].dense_prefix();
a61af66fc99e Initial load duke parents: diff changeset	2527 const MutableSpace* const space = _space_info[space_id].space();
a61af66fc99e Initial load duke parents: diff changeset	2528
a61af66fc99e Initial load duke parents: diff changeset	2529 if (dense_prefix_end == space->bottom()) {
a61af66fc99e Initial load duke parents: diff changeset	2530 // There is no dense prefix for this space.
a61af66fc99e Initial load duke parents: diff changeset	2531 continue;
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 // The dense prefix is before this region.
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2535 size_t region_index_end_dense_prefix =
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2536 sd.addr_to_region_idx(dense_prefix_end);
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2537 RegionData* const dense_prefix_cp =
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2538 sd.region(region_index_end_dense_prefix);
0 a61af66fc99e Initial load duke parents: diff changeset	2539 assert(dense_prefix_end == space->end() \|\|
a61af66fc99e Initial load duke parents: diff changeset	2540 dense_prefix_cp->available() \|\|
a61af66fc99e Initial load duke parents: diff changeset	2541 dense_prefix_cp->claimed(),
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2542 "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	2543
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2544 size_t region_index_start = sd.addr_to_region_idx(space->bottom());
0 a61af66fc99e Initial load duke parents: diff changeset	2545
a61af66fc99e Initial load duke parents: diff changeset	2546 // Is there dense prefix work?
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2547 size_t total_dense_prefix_regions =
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2548 region_index_end_dense_prefix - region_index_start;
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2549 // How many regions of the dense prefix should be given to
0 a61af66fc99e Initial load duke parents: diff changeset	2550 // each thread?
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2551 if (total_dense_prefix_regions > 0) {
0 a61af66fc99e Initial load duke parents: diff changeset	2552 uint tasks_for_dense_prefix = 1;
a61af66fc99e Initial load duke parents: diff changeset	2553 if (UseParallelDensePrefixUpdate) {
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2554 if (total_dense_prefix_regions <=
0 a61af66fc99e Initial load duke parents: diff changeset	2555 (parallel_gc_threads * PAR_OLD_DENSE_PREFIX_OVER_PARTITIONING)) {
a61af66fc99e Initial load duke parents: diff changeset	2556 // Don't over partition. This assumes that
a61af66fc99e Initial load duke parents: diff changeset	2557 // PAR_OLD_DENSE_PREFIX_OVER_PARTITIONING is a small integer value
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2558 // so there are not many regions to process.
0 a61af66fc99e Initial load duke parents: diff changeset	2559 tasks_for_dense_prefix = parallel_gc_threads;
a61af66fc99e Initial load duke parents: diff changeset	2560 } else {
a61af66fc99e Initial load duke parents: diff changeset	2561 // Over partition
a61af66fc99e Initial load duke parents: diff changeset	2562 tasks_for_dense_prefix = parallel_gc_threads *
a61af66fc99e Initial load duke parents: diff changeset	2563 PAR_OLD_DENSE_PREFIX_OVER_PARTITIONING;
a61af66fc99e Initial load duke parents: diff changeset	2564 }
a61af66fc99e Initial load duke parents: diff changeset	2565 }
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2566 size_t regions_per_thread = total_dense_prefix_regions /
0 a61af66fc99e Initial load duke parents: diff changeset	2567 tasks_for_dense_prefix;
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2568 // Give each thread at least 1 region.
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2569 if (regions_per_thread == 0) {
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2570 regions_per_thread = 1;
0 a61af66fc99e Initial load duke parents: diff changeset	2571 }
a61af66fc99e Initial load duke parents: diff changeset	2572
a61af66fc99e Initial load duke parents: diff changeset	2573 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	2574 if (region_index_start >= region_index_end_dense_prefix) {
0 a61af66fc99e Initial load duke parents: diff changeset	2575 break;
a61af66fc99e Initial load duke parents: diff changeset	2576 }
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2577 // region_index_end is not processed
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2578 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	2579 region_index_end_dense_prefix);
482 7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	2580 q->enqueue(new UpdateDensePrefixTask(SpaceId(space_id),
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	2581 region_index_start,
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	2582 region_index_end));
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2583 region_index_start = region_index_end;
0 a61af66fc99e Initial load duke parents: diff changeset	2584 }
a61af66fc99e Initial load duke parents: diff changeset	2585 }
a61af66fc99e Initial load duke parents: diff changeset	2586 // This gets any part of the dense prefix that did not
a61af66fc99e Initial load duke parents: diff changeset	2587 // fit evenly.
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2588 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	2589 q->enqueue(new UpdateDensePrefixTask(SpaceId(space_id),
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	2590 region_index_start,
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	2591 region_index_end_dense_prefix));
0 a61af66fc99e Initial load duke parents: diff changeset	2592 }
482 7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	2593 }
0 a61af66fc99e Initial load duke parents: diff changeset	2594 }
a61af66fc99e Initial load duke parents: diff changeset	2595
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2596 void PSParallelCompact::enqueue_region_stealing_tasks(
0 a61af66fc99e Initial load duke parents: diff changeset	2597 GCTaskQueue* q,
a61af66fc99e Initial load duke parents: diff changeset	2598 ParallelTaskTerminator* terminator_ptr,
a61af66fc99e Initial load duke parents: diff changeset	2599 uint parallel_gc_threads) {
a61af66fc99e Initial load duke parents: diff changeset	2600 TraceTime tm("steal task setup", print_phases(), true, gclog_or_tty);
a61af66fc99e Initial load duke parents: diff changeset	2601
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2602 // Once a thread has drained it's stack, it should try to steal regions from
0 a61af66fc99e Initial load duke parents: diff changeset	2603 // other threads.
a61af66fc99e Initial load duke parents: diff changeset	2604 if (parallel_gc_threads > 1) {
a61af66fc99e Initial load duke parents: diff changeset	2605 for (uint j = 0; j < parallel_gc_threads; j++) {
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2606 q->enqueue(new StealRegionCompactionTask(terminator_ptr));
0 a61af66fc99e Initial load duke parents: diff changeset	2607 }
a61af66fc99e Initial load duke parents: diff changeset	2608 }
a61af66fc99e Initial load duke parents: diff changeset	2609 }
a61af66fc99e Initial load duke parents: diff changeset	2610
a61af66fc99e Initial load duke parents: diff changeset	2611 void PSParallelCompact::compact() {
a61af66fc99e Initial load duke parents: diff changeset	2612 EventMark m("5 compact");
a61af66fc99e Initial load duke parents: diff changeset	2613 // trace("5");
a61af66fc99e Initial load duke parents: diff changeset	2614 TraceTime tm("compaction phase", print_phases(), true, gclog_or_tty);
a61af66fc99e Initial load duke parents: diff changeset	2615
a61af66fc99e Initial load duke parents: diff changeset	2616 ParallelScavengeHeap* heap = (ParallelScavengeHeap*)Universe::heap();
a61af66fc99e Initial load duke parents: diff changeset	2617 assert(heap->kind() == CollectedHeap::ParallelScavengeHeap, "Sanity");
a61af66fc99e Initial load duke parents: diff changeset	2618 PSOldGen* old_gen = heap->old_gen();
a61af66fc99e Initial load duke parents: diff changeset	2619 old_gen->start_array()->reset();
a61af66fc99e Initial load duke parents: diff changeset	2620 uint parallel_gc_threads = heap->gc_task_manager()->workers();
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2621 TaskQueueSetSuper* qset = ParCompactionManager::region_array();
0 a61af66fc99e Initial load duke parents: diff changeset	2622 ParallelTaskTerminator terminator(parallel_gc_threads, qset);
a61af66fc99e Initial load duke parents: diff changeset	2623
a61af66fc99e Initial load duke parents: diff changeset	2624 GCTaskQueue* q = GCTaskQueue::create();
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2625 enqueue_region_draining_tasks(q, parallel_gc_threads);
0 a61af66fc99e Initial load duke parents: diff changeset	2626 enqueue_dense_prefix_tasks(q, parallel_gc_threads);
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2627 enqueue_region_stealing_tasks(q, &terminator, parallel_gc_threads);
0 a61af66fc99e Initial load duke parents: diff changeset	2628
a61af66fc99e Initial load duke parents: diff changeset	2629 {
a61af66fc99e Initial load duke parents: diff changeset	2630 TraceTime tm_pc("par compact", print_phases(), true, gclog_or_tty);
a61af66fc99e Initial load duke parents: diff changeset	2631
a61af66fc99e Initial load duke parents: diff changeset	2632 WaitForBarrierGCTask* fin = WaitForBarrierGCTask::create();
a61af66fc99e Initial load duke parents: diff changeset	2633 q->enqueue(fin);
a61af66fc99e Initial load duke parents: diff changeset	2634
a61af66fc99e Initial load duke parents: diff changeset	2635 gc_task_manager()->add_list(q);
a61af66fc99e Initial load duke parents: diff changeset	2636
a61af66fc99e Initial load duke parents: diff changeset	2637 fin->wait_for();
a61af66fc99e Initial load duke parents: diff changeset	2638
a61af66fc99e Initial load duke parents: diff changeset	2639 // We have to release the barrier tasks!
a61af66fc99e Initial load duke parents: diff changeset	2640 WaitForBarrierGCTask::destroy(fin);
a61af66fc99e Initial load duke parents: diff changeset	2641
a61af66fc99e Initial load duke parents: diff changeset	2642 #ifdef ASSERT
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2643 // Verify that all regions have been processed before the deferred updates.
0 a61af66fc99e Initial load duke parents: diff changeset	2644 // 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	2645 // valid until the perm gen is compacted by regions.
0 a61af66fc99e Initial load duke parents: diff changeset	2646 for (unsigned int id = old_space_id; id < last_space_id; ++id) {
a61af66fc99e Initial load duke parents: diff changeset	2647 verify_complete(SpaceId(id));
a61af66fc99e Initial load duke parents: diff changeset	2648 }
a61af66fc99e Initial load duke parents: diff changeset	2649 #endif
a61af66fc99e Initial load duke parents: diff changeset	2650 }
a61af66fc99e Initial load duke parents: diff changeset	2651
a61af66fc99e Initial load duke parents: diff changeset	2652 {
a61af66fc99e Initial load duke parents: diff changeset	2653 // Update the deferred objects, if any. Any compaction manager can be used.
a61af66fc99e Initial load duke parents: diff changeset	2654 TraceTime tm_du("deferred updates", print_phases(), true, gclog_or_tty);
a61af66fc99e Initial load duke parents: diff changeset	2655 ParCompactionManager* cm = ParCompactionManager::manager_array(0);
a61af66fc99e Initial load duke parents: diff changeset	2656 for (unsigned int id = old_space_id; id < last_space_id; ++id) {
a61af66fc99e Initial load duke parents: diff changeset	2657 update_deferred_objects(cm, SpaceId(id));
a61af66fc99e Initial load duke parents: diff changeset	2658 }
a61af66fc99e Initial load duke parents: diff changeset	2659 }
a61af66fc99e Initial load duke parents: diff changeset	2660 }
a61af66fc99e Initial load duke parents: diff changeset	2661
a61af66fc99e Initial load duke parents: diff changeset	2662 #ifdef ASSERT
a61af66fc99e Initial load duke parents: diff changeset	2663 void PSParallelCompact::verify_complete(SpaceId space_id) {
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2664 // 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	2665 // and all Regions between new_top() and top() should be available (i.e.,
0 a61af66fc99e Initial load duke parents: diff changeset	2666 // should have been emptied).
a61af66fc99e Initial load duke parents: diff changeset	2667 ParallelCompactData& sd = summary_data();
a61af66fc99e Initial load duke parents: diff changeset	2668 SpaceInfo si = _space_info[space_id];
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2669 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	2670 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	2671 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	2672 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	2673 const size_t old_top_region = sd.addr_to_region_idx(old_top_addr);
0 a61af66fc99e Initial load duke parents: diff changeset	2674
a61af66fc99e Initial load duke parents: diff changeset	2675 bool issued_a_warning = false;
a61af66fc99e Initial load duke parents: diff changeset	2676
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2677 size_t cur_region;
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2678 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	2679 const RegionData* const c = sd.region(cur_region);
0 a61af66fc99e Initial load duke parents: diff changeset	2680 if (!c->completed()) {
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2681 warning("region " SIZE_FORMAT " not filled: "
0 a61af66fc99e Initial load duke parents: diff changeset	2682 "destination_count=" SIZE_FORMAT,
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2683 cur_region, c->destination_count());
0 a61af66fc99e Initial load duke parents: diff changeset	2684 issued_a_warning = true;
a61af66fc99e Initial load duke parents: diff changeset	2685 }
a61af66fc99e Initial load duke parents: diff changeset	2686 }
a61af66fc99e Initial load duke parents: diff changeset	2687
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2688 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	2689 const RegionData* const c = sd.region(cur_region);
0 a61af66fc99e Initial load duke parents: diff changeset	2690 if (!c->available()) {
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2691 warning("region " SIZE_FORMAT " not empty: "
0 a61af66fc99e Initial load duke parents: diff changeset	2692 "destination_count=" SIZE_FORMAT,
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2693 cur_region, c->destination_count());
0 a61af66fc99e Initial load duke parents: diff changeset	2694 issued_a_warning = true;
a61af66fc99e Initial load duke parents: diff changeset	2695 }
a61af66fc99e Initial load duke parents: diff changeset	2696 }
a61af66fc99e Initial load duke parents: diff changeset	2697
a61af66fc99e Initial load duke parents: diff changeset	2698 if (issued_a_warning) {
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2699 print_region_ranges();
0 a61af66fc99e Initial load duke parents: diff changeset	2700 }
a61af66fc99e Initial load duke parents: diff changeset	2701 }
a61af66fc99e Initial load duke parents: diff changeset	2702 #endif // #ifdef ASSERT
a61af66fc99e Initial load duke parents: diff changeset	2703
a61af66fc99e Initial load duke parents: diff changeset	2704 void PSParallelCompact::compact_serial(ParCompactionManager* cm) {
a61af66fc99e Initial load duke parents: diff changeset	2705 EventMark m("5 compact serial");
a61af66fc99e Initial load duke parents: diff changeset	2706 TraceTime tm("compact serial", print_phases(), true, gclog_or_tty);
a61af66fc99e Initial load duke parents: diff changeset	2707
a61af66fc99e Initial load duke parents: diff changeset	2708 ParallelScavengeHeap* heap = (ParallelScavengeHeap*)Universe::heap();
a61af66fc99e Initial load duke parents: diff changeset	2709 assert(heap->kind() == CollectedHeap::ParallelScavengeHeap, "Sanity");
a61af66fc99e Initial load duke parents: diff changeset	2710
a61af66fc99e Initial load duke parents: diff changeset	2711 PSYoungGen* young_gen = heap->young_gen();
a61af66fc99e Initial load duke parents: diff changeset	2712 PSOldGen* old_gen = heap->old_gen();
a61af66fc99e Initial load duke parents: diff changeset	2713
a61af66fc99e Initial load duke parents: diff changeset	2714 old_gen->start_array()->reset();
a61af66fc99e Initial load duke parents: diff changeset	2715 old_gen->move_and_update(cm);
a61af66fc99e Initial load duke parents: diff changeset	2716 young_gen->move_and_update(cm);
a61af66fc99e Initial load duke parents: diff changeset	2717 }
a61af66fc99e Initial load duke parents: diff changeset	2718
a61af66fc99e Initial load duke parents: diff changeset	2719 void
941 8b46c4d82093 4957990: Perm heap bloat in JVM ysr parents: 696 diff changeset	2720 PSParallelCompact::follow_weak_klass_links() {
0 a61af66fc99e Initial load duke parents: diff changeset	2721 // All klasses on the revisit stack are marked at this point.
a61af66fc99e Initial load duke parents: diff changeset	2722 // Update and follow all subklass, sibling and implementor links.
941 8b46c4d82093 4957990: Perm heap bloat in JVM ysr parents: 696 diff changeset	2723 if (PrintRevisitStats) {
1836 894b1d7c7e01 6423256: GC stacks should use a better data structure jcoomes parents: 1833 diff changeset	2724 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	2725 SystemDictionary::number_of_classes());
941 8b46c4d82093 4957990: Perm heap bloat in JVM ysr parents: 696 diff changeset	2726 }
8b46c4d82093 4957990: Perm heap bloat in JVM ysr parents: 696 diff changeset	2727 for (uint i = 0; i < ParallelGCThreads + 1; i++) {
0 a61af66fc99e Initial load duke parents: diff changeset	2728 ParCompactionManager* cm = ParCompactionManager::manager_array(i);
a61af66fc99e Initial load duke parents: diff changeset	2729 KeepAliveClosure keep_alive_closure(cm);
1836 894b1d7c7e01 6423256: GC stacks should use a better data structure jcoomes parents: 1833 diff changeset	2730 Stack<Klass> const rks = cm->revisit_klass_stack();
941 8b46c4d82093 4957990: Perm heap bloat in JVM ysr parents: 696 diff changeset	2731 if (PrintRevisitStats) {
1836 894b1d7c7e01 6423256: GC stacks should use a better data structure jcoomes parents: 1833 diff changeset	2732 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	2733 i, rks->size());
941 8b46c4d82093 4957990: Perm heap bloat in JVM ysr parents: 696 diff changeset	2734 }
1836 894b1d7c7e01 6423256: GC stacks should use a better data structure jcoomes parents: 1833 diff changeset	2735 while (!rks->is_empty()) {
894b1d7c7e01 6423256: GC stacks should use a better data structure jcoomes parents: 1833 diff changeset	2736 Klass* const k = rks->pop();
894b1d7c7e01 6423256: GC stacks should use a better data structure jcoomes parents: 1833 diff changeset	2737 k->follow_weak_klass_links(is_alive_closure(), &keep_alive_closure);
0 a61af66fc99e Initial load duke parents: diff changeset	2738 }
1836 894b1d7c7e01 6423256: GC stacks should use a better data structure jcoomes parents: 1833 diff changeset	2739
1311 2a1472c30599 4396719: Mark Sweep stack overflow on deeply nested Object arrays jcoomes parents: 997 diff changeset	2740 cm->follow_marking_stacks();
0 a61af66fc99e Initial load duke parents: diff changeset	2741 }
a61af66fc99e Initial load duke parents: diff changeset	2742 }
a61af66fc99e Initial load duke parents: diff changeset	2743
a61af66fc99e Initial load duke parents: diff changeset	2744 void
a61af66fc99e Initial load duke parents: diff changeset	2745 PSParallelCompact::revisit_weak_klass_link(ParCompactionManager* cm, Klass* k) {
a61af66fc99e Initial load duke parents: diff changeset	2746 cm->revisit_klass_stack()->push(k);
a61af66fc99e Initial load duke parents: diff changeset	2747 }
a61af66fc99e Initial load duke parents: diff changeset	2748
941 8b46c4d82093 4957990: Perm heap bloat in JVM ysr parents: 696 diff changeset	2749 void PSParallelCompact::revisit_mdo(ParCompactionManager* cm, DataLayout* p) {
8b46c4d82093 4957990: Perm heap bloat in JVM ysr parents: 696 diff changeset	2750 cm->revisit_mdo_stack()->push(p);
8b46c4d82093 4957990: Perm heap bloat in JVM ysr parents: 696 diff changeset	2751 }
8b46c4d82093 4957990: Perm heap bloat in JVM ysr parents: 696 diff changeset	2752
8b46c4d82093 4957990: Perm heap bloat in JVM ysr parents: 696 diff changeset	2753 void PSParallelCompact::follow_mdo_weak_refs() {
8b46c4d82093 4957990: Perm heap bloat in JVM ysr parents: 696 diff changeset	2754 // All strongly reachable oops have been marked at this point;
8b46c4d82093 4957990: Perm heap bloat in JVM ysr parents: 696 diff changeset	2755 // we can visit and clear any weak references from MDO's which
8b46c4d82093 4957990: Perm heap bloat in JVM ysr parents: 696 diff changeset	2756 // we memoized during the strong marking phase.
8b46c4d82093 4957990: Perm heap bloat in JVM ysr parents: 696 diff changeset	2757 if (PrintRevisitStats) {
1836 894b1d7c7e01 6423256: GC stacks should use a better data structure jcoomes parents: 1833 diff changeset	2758 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	2759 SystemDictionary::number_of_classes());
941 8b46c4d82093 4957990: Perm heap bloat in JVM ysr parents: 696 diff changeset	2760 }
8b46c4d82093 4957990: Perm heap bloat in JVM ysr parents: 696 diff changeset	2761 for (uint i = 0; i < ParallelGCThreads + 1; i++) {
8b46c4d82093 4957990: Perm heap bloat in JVM ysr parents: 696 diff changeset	2762 ParCompactionManager* cm = ParCompactionManager::manager_array(i);
1836 894b1d7c7e01 6423256: GC stacks should use a better data structure jcoomes parents: 1833 diff changeset	2763 Stack<DataLayout> rms = cm->revisit_mdo_stack();
941 8b46c4d82093 4957990: Perm heap bloat in JVM ysr parents: 696 diff changeset	2764 if (PrintRevisitStats) {
1836 894b1d7c7e01 6423256: GC stacks should use a better data structure jcoomes parents: 1833 diff changeset	2765 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	2766 i, rms->size());
941 8b46c4d82093 4957990: Perm heap bloat in JVM ysr parents: 696 diff changeset	2767 }
1836 894b1d7c7e01 6423256: GC stacks should use a better data structure jcoomes parents: 1833 diff changeset	2768 while (!rms->is_empty()) {
894b1d7c7e01 6423256: GC stacks should use a better data structure jcoomes parents: 1833 diff changeset	2769 rms->pop()->follow_weak_refs(is_alive_closure());
941 8b46c4d82093 4957990: Perm heap bloat in JVM ysr parents: 696 diff changeset	2770 }
1836 894b1d7c7e01 6423256: GC stacks should use a better data structure jcoomes parents: 1833 diff changeset	2771
1311 2a1472c30599 4396719: Mark Sweep stack overflow on deeply nested Object arrays jcoomes parents: 997 diff changeset	2772 cm->follow_marking_stacks();
941 8b46c4d82093 4957990: Perm heap bloat in JVM ysr parents: 696 diff changeset	2773 }
8b46c4d82093 4957990: Perm heap bloat in JVM ysr parents: 696 diff changeset	2774 }
8b46c4d82093 4957990: Perm heap bloat in JVM ysr parents: 696 diff changeset	2775
8b46c4d82093 4957990: Perm heap bloat in JVM ysr parents: 696 diff changeset	2776
0 a61af66fc99e Initial load duke parents: diff changeset	2777 #ifdef VALIDATE_MARK_SWEEP
a61af66fc99e Initial load duke parents: diff changeset	2778
113 ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 79 diff changeset	2779 void PSParallelCompact::track_adjusted_pointer(void* p, bool isroot) {
0 a61af66fc99e Initial load duke parents: diff changeset	2780 if (!ValidateMarkSweep)
a61af66fc99e Initial load duke parents: diff changeset	2781 return;
a61af66fc99e Initial load duke parents: diff changeset	2782
a61af66fc99e Initial load duke parents: diff changeset	2783 if (!isroot) {
a61af66fc99e Initial load duke parents: diff changeset	2784 if (_pointer_tracking) {
a61af66fc99e Initial load duke parents: diff changeset	2785 guarantee(_adjusted_pointers->contains(p), "should have seen this pointer");
a61af66fc99e Initial load duke parents: diff changeset	2786 _adjusted_pointers->remove(p);
a61af66fc99e Initial load duke parents: diff changeset	2787 }
a61af66fc99e Initial load duke parents: diff changeset	2788 } else {
a61af66fc99e Initial load duke parents: diff changeset	2789 ptrdiff_t index = _root_refs_stack->find(p);
a61af66fc99e Initial load duke parents: diff changeset	2790 if (index != -1) {
a61af66fc99e Initial load duke parents: diff changeset	2791 int l = _root_refs_stack->length();
a61af66fc99e Initial load duke parents: diff changeset	2792 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	2793 void* last = _root_refs_stack->pop();
0 a61af66fc99e Initial load duke parents: diff changeset	2794 assert(last != p, "should be different");
a61af66fc99e Initial load duke parents: diff changeset	2795 _root_refs_stack->at_put(index, last);
a61af66fc99e Initial load duke parents: diff changeset	2796 } else {
a61af66fc99e Initial load duke parents: diff changeset	2797 _root_refs_stack->remove(p);
a61af66fc99e Initial load duke parents: diff changeset	2798 }
a61af66fc99e Initial load duke parents: diff changeset	2799 }
a61af66fc99e Initial load duke parents: diff changeset	2800 }
a61af66fc99e Initial load duke parents: diff changeset	2801 }
a61af66fc99e Initial load duke parents: diff changeset	2802
a61af66fc99e Initial load duke parents: diff changeset	2803
113 ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 79 diff changeset	2804 void PSParallelCompact::check_adjust_pointer(void* p) {
0 a61af66fc99e Initial load duke parents: diff changeset	2805 _adjusted_pointers->push(p);
a61af66fc99e Initial load duke parents: diff changeset	2806 }
a61af66fc99e Initial load duke parents: diff changeset	2807
a61af66fc99e Initial load duke parents: diff changeset	2808
a61af66fc99e Initial load duke parents: diff changeset	2809 class AdjusterTracker: public OopClosure {
a61af66fc99e Initial load duke parents: diff changeset	2810 public:
a61af66fc99e Initial load duke parents: diff changeset	2811 AdjusterTracker() {};
113 ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 79 diff changeset	2812 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	2813 void do_oop(narrowOop* o) { PSParallelCompact::check_adjust_pointer(o); }
0 a61af66fc99e Initial load duke parents: diff changeset	2814 };
a61af66fc99e Initial load duke parents: diff changeset	2815
a61af66fc99e Initial load duke parents: diff changeset	2816
a61af66fc99e Initial load duke parents: diff changeset	2817 void PSParallelCompact::track_interior_pointers(oop obj) {
a61af66fc99e Initial load duke parents: diff changeset	2818 if (ValidateMarkSweep) {
a61af66fc99e Initial load duke parents: diff changeset	2819 _adjusted_pointers->clear();
a61af66fc99e Initial load duke parents: diff changeset	2820 _pointer_tracking = true;
a61af66fc99e Initial load duke parents: diff changeset	2821
a61af66fc99e Initial load duke parents: diff changeset	2822 AdjusterTracker checker;
a61af66fc99e Initial load duke parents: diff changeset	2823 obj->oop_iterate(&checker);
a61af66fc99e Initial load duke parents: diff changeset	2824 }
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 void PSParallelCompact::check_interior_pointers() {
a61af66fc99e Initial load duke parents: diff changeset	2829 if (ValidateMarkSweep) {
a61af66fc99e Initial load duke parents: diff changeset	2830 _pointer_tracking = false;
a61af66fc99e Initial load duke parents: diff changeset	2831 guarantee(_adjusted_pointers->length() == 0, "should have processed the same pointers");
a61af66fc99e Initial load duke parents: diff changeset	2832 }
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::reset_live_oop_tracking(bool at_perm) {
a61af66fc99e Initial load duke parents: diff changeset	2837 if (ValidateMarkSweep) {
a61af66fc99e Initial load duke parents: diff changeset	2838 guarantee((size_t)_live_oops->length() == _live_oops_index, "should be at end of live oops");
a61af66fc99e Initial load duke parents: diff changeset	2839 _live_oops_index = at_perm ? _live_oops_index_at_perm : 0;
a61af66fc99e Initial load duke parents: diff changeset	2840 }
a61af66fc99e Initial load duke parents: diff changeset	2841 }
a61af66fc99e Initial load duke parents: diff changeset	2842
a61af66fc99e Initial load duke parents: diff changeset	2843
a61af66fc99e Initial load duke parents: diff changeset	2844 void PSParallelCompact::register_live_oop(oop p, size_t size) {
a61af66fc99e Initial load duke parents: diff changeset	2845 if (ValidateMarkSweep) {
a61af66fc99e Initial load duke parents: diff changeset	2846 _live_oops->push(p);
a61af66fc99e Initial load duke parents: diff changeset	2847 _live_oops_size->push(size);
a61af66fc99e Initial load duke parents: diff changeset	2848 _live_oops_index++;
a61af66fc99e Initial load duke parents: diff changeset	2849 }
a61af66fc99e Initial load duke parents: diff changeset	2850 }
a61af66fc99e Initial load duke parents: diff changeset	2851
a61af66fc99e Initial load duke parents: diff changeset	2852 void PSParallelCompact::validate_live_oop(oop p, size_t size) {
a61af66fc99e Initial load duke parents: diff changeset	2853 if (ValidateMarkSweep) {
a61af66fc99e Initial load duke parents: diff changeset	2854 oop obj = _live_oops->at((int)_live_oops_index);
a61af66fc99e Initial load duke parents: diff changeset	2855 guarantee(obj == p, "should be the same object");
a61af66fc99e Initial load duke parents: diff changeset	2856 guarantee(_live_oops_size->at((int)_live_oops_index) == size, "should be the same size");
a61af66fc99e Initial load duke parents: diff changeset	2857 _live_oops_index++;
a61af66fc99e Initial load duke parents: diff changeset	2858 }
a61af66fc99e Initial load duke parents: diff changeset	2859 }
a61af66fc99e Initial load duke parents: diff changeset	2860
a61af66fc99e Initial load duke parents: diff changeset	2861 void PSParallelCompact::live_oop_moved_to(HeapWord* q, size_t size,
a61af66fc99e Initial load duke parents: diff changeset	2862 HeapWord* compaction_top) {
a61af66fc99e Initial load duke parents: diff changeset	2863 assert(oop(q)->forwardee() == NULL \|\| oop(q)->forwardee() == oop(compaction_top),
a61af66fc99e Initial load duke parents: diff changeset	2864 "should be moved to forwarded location");
a61af66fc99e Initial load duke parents: diff changeset	2865 if (ValidateMarkSweep) {
a61af66fc99e Initial load duke parents: diff changeset	2866 PSParallelCompact::validate_live_oop(oop(q), size);
a61af66fc99e Initial load duke parents: diff changeset	2867 _live_oops_moved_to->push(oop(compaction_top));
a61af66fc99e Initial load duke parents: diff changeset	2868 }
a61af66fc99e Initial load duke parents: diff changeset	2869 if (RecordMarkSweepCompaction) {
a61af66fc99e Initial load duke parents: diff changeset	2870 _cur_gc_live_oops->push(q);
a61af66fc99e Initial load duke parents: diff changeset	2871 _cur_gc_live_oops_moved_to->push(compaction_top);
a61af66fc99e Initial load duke parents: diff changeset	2872 _cur_gc_live_oops_size->push(size);
a61af66fc99e Initial load duke parents: diff changeset	2873 }
a61af66fc99e Initial load duke parents: diff changeset	2874 }
a61af66fc99e Initial load duke parents: diff changeset	2875
a61af66fc99e Initial load duke parents: diff changeset	2876
a61af66fc99e Initial load duke parents: diff changeset	2877 void PSParallelCompact::compaction_complete() {
a61af66fc99e Initial load duke parents: diff changeset	2878 if (RecordMarkSweepCompaction) {
a61af66fc99e Initial load duke parents: diff changeset	2879 GrowableArray<HeapWord> _tmp_live_oops = _cur_gc_live_oops;
a61af66fc99e Initial load duke parents: diff changeset	2880 GrowableArray<HeapWord> _tmp_live_oops_moved_to = _cur_gc_live_oops_moved_to;
a61af66fc99e Initial load duke parents: diff changeset	2881 GrowableArray<size_t> * _tmp_live_oops_size = _cur_gc_live_oops_size;
a61af66fc99e Initial load duke parents: diff changeset	2882
a61af66fc99e Initial load duke parents: diff changeset	2883 _cur_gc_live_oops = _last_gc_live_oops;
a61af66fc99e Initial load duke parents: diff changeset	2884 _cur_gc_live_oops_moved_to = _last_gc_live_oops_moved_to;
a61af66fc99e Initial load duke parents: diff changeset	2885 _cur_gc_live_oops_size = _last_gc_live_oops_size;
a61af66fc99e Initial load duke parents: diff changeset	2886 _last_gc_live_oops = _tmp_live_oops;
a61af66fc99e Initial load duke parents: diff changeset	2887 _last_gc_live_oops_moved_to = _tmp_live_oops_moved_to;
a61af66fc99e Initial load duke parents: diff changeset	2888 _last_gc_live_oops_size = _tmp_live_oops_size;
a61af66fc99e Initial load duke parents: diff changeset	2889 }
a61af66fc99e Initial load duke parents: diff changeset	2890 }
a61af66fc99e Initial load duke parents: diff changeset	2891
a61af66fc99e Initial load duke parents: diff changeset	2892
a61af66fc99e Initial load duke parents: diff changeset	2893 void PSParallelCompact::print_new_location_of_heap_address(HeapWord* q) {
a61af66fc99e Initial load duke parents: diff changeset	2894 if (!RecordMarkSweepCompaction) {
a61af66fc99e Initial load duke parents: diff changeset	2895 tty->print_cr("Requires RecordMarkSweepCompaction to be enabled");
a61af66fc99e Initial load duke parents: diff changeset	2896 return;
a61af66fc99e Initial load duke parents: diff changeset	2897 }
a61af66fc99e Initial load duke parents: diff changeset	2898
a61af66fc99e Initial load duke parents: diff changeset	2899 if (_last_gc_live_oops == NULL) {
a61af66fc99e Initial load duke parents: diff changeset	2900 tty->print_cr("No compaction information gathered yet");
a61af66fc99e Initial load duke parents: diff changeset	2901 return;
a61af66fc99e Initial load duke parents: diff changeset	2902 }
a61af66fc99e Initial load duke parents: diff changeset	2903
a61af66fc99e Initial load duke parents: diff changeset	2904 for (int i = 0; i < _last_gc_live_oops->length(); i++) {
a61af66fc99e Initial load duke parents: diff changeset	2905 HeapWord* old_oop = _last_gc_live_oops->at(i);
a61af66fc99e Initial load duke parents: diff changeset	2906 size_t sz = _last_gc_live_oops_size->at(i);
a61af66fc99e Initial load duke parents: diff changeset	2907 if (old_oop <= q && q < (old_oop + sz)) {
a61af66fc99e Initial load duke parents: diff changeset	2908 HeapWord* new_oop = _last_gc_live_oops_moved_to->at(i);
a61af66fc99e Initial load duke parents: diff changeset	2909 size_t offset = (q - old_oop);
a61af66fc99e Initial load duke parents: diff changeset	2910 tty->print_cr("Address " PTR_FORMAT, q);
a61af66fc99e Initial load duke parents: diff changeset	2911 tty->print_cr(" Was in oop " PTR_FORMAT ", size %d, at offset %d", old_oop, sz, offset);
a61af66fc99e Initial load duke parents: diff changeset	2912 tty->print_cr(" Now in oop " PTR_FORMAT ", actual address " PTR_FORMAT, new_oop, new_oop + offset);
a61af66fc99e Initial load duke parents: diff changeset	2913 return;
a61af66fc99e Initial load duke parents: diff changeset	2914 }
a61af66fc99e Initial load duke parents: diff changeset	2915 }
a61af66fc99e Initial load duke parents: diff changeset	2916
a61af66fc99e Initial load duke parents: diff changeset	2917 tty->print_cr("Address " PTR_FORMAT " not found in live oop information from last GC", q);
a61af66fc99e Initial load duke parents: diff changeset	2918 }
a61af66fc99e Initial load duke parents: diff changeset	2919 #endif //VALIDATE_MARK_SWEEP
a61af66fc99e Initial load duke parents: diff changeset	2920
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2921 // Update interior oops in the ranges of regions [beg_region, end_region).
0 a61af66fc99e Initial load duke parents: diff changeset	2922 void
a61af66fc99e Initial load duke parents: diff changeset	2923 PSParallelCompact::update_and_deadwood_in_dense_prefix(ParCompactionManager* cm,
a61af66fc99e Initial load duke parents: diff changeset	2924 SpaceId space_id,
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2925 size_t beg_region,
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2926 size_t end_region) {
0 a61af66fc99e Initial load duke parents: diff changeset	2927 ParallelCompactData& sd = summary_data();
a61af66fc99e Initial load duke parents: diff changeset	2928 ParMarkBitMap* const mbm = mark_bitmap();
a61af66fc99e Initial load duke parents: diff changeset	2929
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2930 HeapWord* beg_addr = sd.region_to_addr(beg_region);
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2931 HeapWord* const end_addr = sd.region_to_addr(end_region);
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2932 assert(beg_region <= end_region, "bad region range");
0 a61af66fc99e Initial load duke parents: diff changeset	2933 assert(end_addr <= dense_prefix(space_id), "not in the dense prefix");
a61af66fc99e Initial load duke parents: diff changeset	2934
a61af66fc99e Initial load duke parents: diff changeset	2935 #ifdef ASSERT
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2936 // Claim the regions to avoid triggering an assert when they are marked as
0 a61af66fc99e Initial load duke parents: diff changeset	2937 // filled.
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2938 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	2939 assert(sd.region(claim_region)->claim_unsafe(), "claim() failed");
0 a61af66fc99e Initial load duke parents: diff changeset	2940 }
a61af66fc99e Initial load duke parents: diff changeset	2941 #endif // #ifdef ASSERT
a61af66fc99e Initial load duke parents: diff changeset	2942
a61af66fc99e Initial load duke parents: diff changeset	2943 if (beg_addr != space(space_id)->bottom()) {
a61af66fc99e Initial load duke parents: diff changeset	2944 // 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	2945 // 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	2946 // 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	2947 // 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	2948 // 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	2949 // 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	2950 // space.
0 a61af66fc99e Initial load duke parents: diff changeset	2951 assert(beg_addr > space(space_id)->bottom(), "sanity");
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2952 const RegionData* const cp = sd.region(beg_region);
0 a61af66fc99e Initial load duke parents: diff changeset	2953 if (cp->partial_obj_size() != 0) {
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2954 beg_addr = sd.partial_obj_end(beg_region);
0 a61af66fc99e Initial load duke parents: diff changeset	2955 } else if (dead_space_crosses_boundary(cp, mbm->addr_to_bit(beg_addr))) {
a61af66fc99e Initial load duke parents: diff changeset	2956 beg_addr = mbm->find_obj_beg(beg_addr, end_addr);
a61af66fc99e Initial load duke parents: diff changeset	2957 }
a61af66fc99e Initial load duke parents: diff changeset	2958 }
a61af66fc99e Initial load duke parents: diff changeset	2959
a61af66fc99e Initial load duke parents: diff changeset	2960 if (beg_addr < end_addr) {
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2961 // A live object or block of dead space starts in this range of Regions.
0 a61af66fc99e Initial load duke parents: diff changeset	2962 HeapWord* const dense_prefix_end = dense_prefix(space_id);
a61af66fc99e Initial load duke parents: diff changeset	2963
a61af66fc99e Initial load duke parents: diff changeset	2964 // Create closures and iterate.
a61af66fc99e Initial load duke parents: diff changeset	2965 UpdateOnlyClosure update_closure(mbm, cm, space_id);
a61af66fc99e Initial load duke parents: diff changeset	2966 FillClosure fill_closure(cm, space_id);
a61af66fc99e Initial load duke parents: diff changeset	2967 ParMarkBitMap::IterationStatus status;
a61af66fc99e Initial load duke parents: diff changeset	2968 status = mbm->iterate(&update_closure, &fill_closure, beg_addr, end_addr,
a61af66fc99e Initial load duke parents: diff changeset	2969 dense_prefix_end);
a61af66fc99e Initial load duke parents: diff changeset	2970 if (status == ParMarkBitMap::incomplete) {
a61af66fc99e Initial load duke parents: diff changeset	2971 update_closure.do_addr(update_closure.source());
a61af66fc99e Initial load duke parents: diff changeset	2972 }
a61af66fc99e Initial load duke parents: diff changeset	2973 }
a61af66fc99e Initial load duke parents: diff changeset	2974
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2975 // Mark the regions as filled.
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2976 RegionData* const beg_cp = sd.region(beg_region);
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2977 RegionData* const end_cp = sd.region(end_region);
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	2978 for (RegionData* cp = beg_cp; cp < end_cp; ++cp) {
0 a61af66fc99e Initial load duke parents: diff changeset	2979 cp->set_completed();
a61af66fc99e Initial load duke parents: diff changeset	2980 }
a61af66fc99e Initial load duke parents: diff changeset	2981 }
a61af66fc99e Initial load duke parents: diff changeset	2982
a61af66fc99e Initial load duke parents: diff changeset	2983 // Return the SpaceId for the space containing addr. If addr is not in the
a61af66fc99e Initial load duke parents: diff changeset	2984 // heap, last_space_id is returned. In debug mode it expects the address to be
a61af66fc99e Initial load duke parents: diff changeset	2985 // in the heap and asserts such.
a61af66fc99e Initial load duke parents: diff changeset	2986 PSParallelCompact::SpaceId PSParallelCompact::space_id(HeapWord* addr) {
a61af66fc99e Initial load duke parents: diff changeset	2987 assert(Universe::heap()->is_in_reserved(addr), "addr not in the heap");
a61af66fc99e Initial load duke parents: diff changeset	2988
a61af66fc99e Initial load duke parents: diff changeset	2989 for (unsigned int id = perm_space_id; id < last_space_id; ++id) {
a61af66fc99e Initial load duke parents: diff changeset	2990 if (_space_info[id].space()->contains(addr)) {
a61af66fc99e Initial load duke parents: diff changeset	2991 return SpaceId(id);
a61af66fc99e Initial load duke parents: diff changeset	2992 }
a61af66fc99e Initial load duke parents: diff changeset	2993 }
a61af66fc99e Initial load duke parents: diff changeset	2994
a61af66fc99e Initial load duke parents: diff changeset	2995 assert(false, "no space contains the addr");
a61af66fc99e Initial load duke parents: diff changeset	2996 return last_space_id;
a61af66fc99e Initial load duke parents: diff changeset	2997 }
a61af66fc99e Initial load duke parents: diff changeset	2998
a61af66fc99e Initial load duke parents: diff changeset	2999 void PSParallelCompact::update_deferred_objects(ParCompactionManager* cm,
a61af66fc99e Initial load duke parents: diff changeset	3000 SpaceId id) {
a61af66fc99e Initial load duke parents: diff changeset	3001 assert(id < last_space_id, "bad space id");
a61af66fc99e Initial load duke parents: diff changeset	3002
a61af66fc99e Initial load duke parents: diff changeset	3003 ParallelCompactData& sd = summary_data();
a61af66fc99e Initial load duke parents: diff changeset	3004 const SpaceInfo* const space_info = _space_info + id;
a61af66fc99e Initial load duke parents: diff changeset	3005 ObjectStartArray* const start_array = space_info->start_array();
a61af66fc99e Initial load duke parents: diff changeset	3006
a61af66fc99e Initial load duke parents: diff changeset	3007 const MutableSpace* const space = space_info->space();
a61af66fc99e Initial load duke parents: diff changeset	3008 assert(space_info->dense_prefix() >= space->bottom(), "dense_prefix not set");
a61af66fc99e Initial load duke parents: diff changeset	3009 HeapWord* const beg_addr = space_info->dense_prefix();
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3010 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	3011
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3012 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	3013 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	3014 const RegionData* cur_region;
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3015 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	3016 HeapWord* const addr = cur_region->deferred_obj_addr();
0 a61af66fc99e Initial load duke parents: diff changeset	3017 if (addr != NULL) {
a61af66fc99e Initial load duke parents: diff changeset	3018 if (start_array != NULL) {
a61af66fc99e Initial load duke parents: diff changeset	3019 start_array->allocate_block(addr);
a61af66fc99e Initial load duke parents: diff changeset	3020 }
a61af66fc99e Initial load duke parents: diff changeset	3021 oop(addr)->update_contents(cm);
a61af66fc99e Initial load duke parents: diff changeset	3022 assert(oop(addr)->is_oop_or_null(), "should be an oop now");
a61af66fc99e Initial load duke parents: diff changeset	3023 }
a61af66fc99e Initial load duke parents: diff changeset	3024 }
a61af66fc99e Initial load duke parents: diff changeset	3025 }
a61af66fc99e Initial load duke parents: diff changeset	3026
a61af66fc99e Initial load duke parents: diff changeset	3027 // Skip over count live words starting from beg, and return the address of the
a61af66fc99e Initial load duke parents: diff changeset	3028 // next live word. Unless marked, the word corresponding to beg is assumed to
a61af66fc99e Initial load duke parents: diff changeset	3029 // be dead. Callers must either ensure beg does not correspond to the middle of
a61af66fc99e Initial load duke parents: diff changeset	3030 // an object, or account for those live words in some other way. Callers must
a61af66fc99e Initial load duke parents: diff changeset	3031 // also ensure that there are enough live words in the range [beg, end) to skip.
a61af66fc99e Initial load duke parents: diff changeset	3032 HeapWord*
a61af66fc99e Initial load duke parents: diff changeset	3033 PSParallelCompact::skip_live_words(HeapWord* beg, HeapWord* end, size_t count)
a61af66fc99e Initial load duke parents: diff changeset	3034 {
a61af66fc99e Initial load duke parents: diff changeset	3035 assert(count > 0, "sanity");
a61af66fc99e Initial load duke parents: diff changeset	3036
a61af66fc99e Initial load duke parents: diff changeset	3037 ParMarkBitMap* m = mark_bitmap();
a61af66fc99e Initial load duke parents: diff changeset	3038 idx_t bits_to_skip = m->words_to_bits(count);
a61af66fc99e Initial load duke parents: diff changeset	3039 idx_t cur_beg = m->addr_to_bit(beg);
a61af66fc99e Initial load duke parents: diff changeset	3040 const idx_t search_end = BitMap::word_align_up(m->addr_to_bit(end));
a61af66fc99e Initial load duke parents: diff changeset	3041
a61af66fc99e Initial load duke parents: diff changeset	3042 do {
a61af66fc99e Initial load duke parents: diff changeset	3043 cur_beg = m->find_obj_beg(cur_beg, search_end);
a61af66fc99e Initial load duke parents: diff changeset	3044 idx_t cur_end = m->find_obj_end(cur_beg, search_end);
a61af66fc99e Initial load duke parents: diff changeset	3045 const size_t obj_bits = cur_end - cur_beg + 1;
a61af66fc99e Initial load duke parents: diff changeset	3046 if (obj_bits > bits_to_skip) {
a61af66fc99e Initial load duke parents: diff changeset	3047 return m->bit_to_addr(cur_beg + bits_to_skip);
a61af66fc99e Initial load duke parents: diff changeset	3048 }
a61af66fc99e Initial load duke parents: diff changeset	3049 bits_to_skip -= obj_bits;
a61af66fc99e Initial load duke parents: diff changeset	3050 cur_beg = cur_end + 1;
a61af66fc99e Initial load duke parents: diff changeset	3051 } while (bits_to_skip > 0);
a61af66fc99e Initial load duke parents: diff changeset	3052
a61af66fc99e Initial load duke parents: diff changeset	3053 // Skipping the desired number of words landed just past the end of an object.
a61af66fc99e Initial load duke parents: diff changeset	3054 // Find the start of the next object.
a61af66fc99e Initial load duke parents: diff changeset	3055 cur_beg = m->find_obj_beg(cur_beg, search_end);
a61af66fc99e Initial load duke parents: diff changeset	3056 assert(cur_beg < m->addr_to_bit(end), "not enough live words to skip");
a61af66fc99e Initial load duke parents: diff changeset	3057 return m->bit_to_addr(cur_beg);
a61af66fc99e Initial load duke parents: diff changeset	3058 }
a61af66fc99e Initial load duke parents: diff changeset	3059
482 7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	3060 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	3061 SpaceId src_space_id,
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	3062 size_t src_region_idx)
0 a61af66fc99e Initial load duke parents: diff changeset	3063 {
482 7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	3064 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	3065
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	3066 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	3067 if (split_info.dest_region_addr() == dest_addr) {
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	3068 // 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	3069 // be copied to dest_addr.
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	3070 return split_info.first_src_addr();
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	3071 }
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	3072
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	3073 const ParallelCompactData& sd = summary_data();
0 a61af66fc99e Initial load duke parents: diff changeset	3074 ParMarkBitMap* const bitmap = mark_bitmap();
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3075 const size_t RegionSize = ParallelCompactData::RegionSize;
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3076
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3077 assert(sd.is_region_aligned(dest_addr), "not aligned");
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3078 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	3079 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	3080 HeapWord* const src_region_destination = src_region_ptr->destination();
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3081
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3082 assert(dest_addr >= src_region_destination, "wrong src region");
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3083 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	3084
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3085 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	3086 HeapWord* const src_region_end = src_region_beg + RegionSize;
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3087
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3088 HeapWord* addr = src_region_beg;
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3089 if (dest_addr == src_region_destination) {
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3090 // Return the first live word in the source region.
0 a61af66fc99e Initial load duke parents: diff changeset	3091 if (partial_obj_size == 0) {
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3092 addr = bitmap->find_obj_beg(addr, src_region_end);
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3093 assert(addr < src_region_end, "no objects start in src region");
0 a61af66fc99e Initial load duke parents: diff changeset	3094 }
a61af66fc99e Initial load duke parents: diff changeset	3095 return addr;
a61af66fc99e Initial load duke parents: diff changeset	3096 }
a61af66fc99e Initial load duke parents: diff changeset	3097
a61af66fc99e Initial load duke parents: diff changeset	3098 // Must skip some live data.
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3099 size_t words_to_skip = dest_addr - src_region_destination;
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3100 assert(src_region_ptr->data_size() > words_to_skip, "wrong src region");
0 a61af66fc99e Initial load duke parents: diff changeset	3101
a61af66fc99e Initial load duke parents: diff changeset	3102 if (partial_obj_size >= words_to_skip) {
a61af66fc99e Initial load duke parents: diff changeset	3103 // All the live words to skip are part of the partial object.
a61af66fc99e Initial load duke parents: diff changeset	3104 addr += words_to_skip;
a61af66fc99e Initial load duke parents: diff changeset	3105 if (partial_obj_size == words_to_skip) {
a61af66fc99e Initial load duke parents: diff changeset	3106 // Find the first live word past the partial object.
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3107 addr = bitmap->find_obj_beg(addr, src_region_end);
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3108 assert(addr < src_region_end, "wrong src region");
0 a61af66fc99e Initial load duke parents: diff changeset	3109 }
a61af66fc99e Initial load duke parents: diff changeset	3110 return addr;
a61af66fc99e Initial load duke parents: diff changeset	3111 }
a61af66fc99e Initial load duke parents: diff changeset	3112
a61af66fc99e Initial load duke parents: diff changeset	3113 // Skip over the partial object (if any).
a61af66fc99e Initial load duke parents: diff changeset	3114 if (partial_obj_size != 0) {
a61af66fc99e Initial load duke parents: diff changeset	3115 words_to_skip -= partial_obj_size;
a61af66fc99e Initial load duke parents: diff changeset	3116 addr += partial_obj_size;
a61af66fc99e Initial load duke parents: diff changeset	3117 }
a61af66fc99e Initial load duke parents: diff changeset	3118
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3119 // 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	3120 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	3121 assert(addr < src_region_end, "wrong src region");
0 a61af66fc99e Initial load duke parents: diff changeset	3122 return addr;
a61af66fc99e Initial load duke parents: diff changeset	3123 }
a61af66fc99e Initial load duke parents: diff changeset	3124
a61af66fc99e Initial load duke parents: diff changeset	3125 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	3126 SpaceId src_space_id,
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3127 size_t beg_region,
0 a61af66fc99e Initial load duke parents: diff changeset	3128 HeapWord* end_addr)
a61af66fc99e Initial load duke parents: diff changeset	3129 {
a61af66fc99e Initial load duke parents: diff changeset	3130 ParallelCompactData& sd = summary_data();
495 234c22e54b98 6784849: par compact - can fail when to_space is non-empty jcoomes parents: 483 diff changeset	3131
234c22e54b98 6784849: par compact - can fail when to_space is non-empty jcoomes parents: 483 diff changeset	3132 #ifdef ASSERT
234c22e54b98 6784849: par compact - can fail when to_space is non-empty jcoomes parents: 483 diff changeset	3133 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	3134 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	3135 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	3136 "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	3137 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	3138 "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	3139 #endif // #ifdef ASSERT
234c22e54b98 6784849: par compact - can fail when to_space is non-empty jcoomes parents: 483 diff changeset	3140
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3141 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	3142 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	3143
234c22e54b98 6784849: par compact - can fail when to_space is non-empty jcoomes parents: 483 diff changeset	3144 // 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	3145 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	3146 RegionData* const enqueue_end =
234c22e54b98 6784849: par compact - can fail when to_space is non-empty jcoomes parents: 483 diff changeset	3147 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	3148
234c22e54b98 6784849: par compact - can fail when to_space is non-empty jcoomes parents: 483 diff changeset	3149 for (RegionData* cur = beg; cur < end; ++cur) {
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3150 assert(cur->data_size() > 0, "region must have live data");
0 a61af66fc99e Initial load duke parents: diff changeset	3151 cur->decrement_destination_count();
495 234c22e54b98 6784849: par compact - can fail when to_space is non-empty jcoomes parents: 483 diff changeset	3152 if (cur < enqueue_end && cur->available() && cur->claim()) {
1638 b2a00dd3117c 6957084: simplify TaskQueue overflow handling jcoomes parents: 1579 diff changeset	3153 cm->push_region(sd.region(cur));
0 a61af66fc99e Initial load duke parents: diff changeset	3154 }
a61af66fc99e Initial load duke parents: diff changeset	3155 }
a61af66fc99e Initial load duke parents: diff changeset	3156 }
a61af66fc99e Initial load duke parents: diff changeset	3157
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3158 size_t PSParallelCompact::next_src_region(MoveAndUpdateClosure& closure,
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3159 SpaceId& src_space_id,
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3160 HeapWord*& src_space_top,
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3161 HeapWord* end_addr)
0 a61af66fc99e Initial load duke parents: diff changeset	3162 {
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3163 typedef ParallelCompactData::RegionData RegionData;
0 a61af66fc99e Initial load duke parents: diff changeset	3164
a61af66fc99e Initial load duke parents: diff changeset	3165 ParallelCompactData& sd = PSParallelCompact::summary_data();
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3166 const size_t region_size = ParallelCompactData::RegionSize;
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3167
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3168 size_t src_region_idx = 0;
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3169
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3170 // 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	3171 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	3172 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	3173 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	3174 const RegionData* const top_region_ptr =
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3175 sd.addr_to_region_ptr(top_aligned_up);
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3176 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	3177 ++src_region_ptr;
0 a61af66fc99e Initial load duke parents: diff changeset	3178 }
a61af66fc99e Initial load duke parents: diff changeset	3179
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3180 if (src_region_ptr < top_region_ptr) {
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3181 // 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	3182 // and the source address to match src_region_ptr.
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3183 src_region_idx = sd.region(src_region_ptr);
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3184 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	3185 if (src_region_addr > closure.source()) {
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3186 closure.set_source(src_region_addr);
0 a61af66fc99e Initial load duke parents: diff changeset	3187 }
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3188 return src_region_idx;
0 a61af66fc99e Initial load duke parents: diff changeset	3189 }
a61af66fc99e Initial load duke parents: diff changeset	3190
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3191 // Switch to a new source space and find the first non-empty region.
0 a61af66fc99e Initial load duke parents: diff changeset	3192 unsigned int space_id = src_space_id + 1;
a61af66fc99e Initial load duke parents: diff changeset	3193 assert(space_id < last_space_id, "not enough spaces");
a61af66fc99e Initial load duke parents: diff changeset	3194
a61af66fc99e Initial load duke parents: diff changeset	3195 HeapWord* const destination = closure.destination();
a61af66fc99e Initial load duke parents: diff changeset	3196
a61af66fc99e Initial load duke parents: diff changeset	3197 do {
a61af66fc99e Initial load duke parents: diff changeset	3198 MutableSpace* space = _space_info[space_id].space();
a61af66fc99e Initial load duke parents: diff changeset	3199 HeapWord* const bottom = space->bottom();
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3200 const RegionData* const bottom_cp = sd.addr_to_region_ptr(bottom);
0 a61af66fc99e Initial load duke parents: diff changeset	3201
a61af66fc99e Initial load duke parents: diff changeset	3202 // Iterate over the spaces that do not compact into themselves.
a61af66fc99e Initial load duke parents: diff changeset	3203 if (bottom_cp->destination() != bottom) {
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3204 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	3205 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	3206
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3207 for (const RegionData* src_cp = bottom_cp; src_cp < top_cp; ++src_cp) {
0 a61af66fc99e Initial load duke parents: diff changeset	3208 if (src_cp->live_obj_size() > 0) {
a61af66fc99e Initial load duke parents: diff changeset	3209 // Found it.
a61af66fc99e Initial load duke parents: diff changeset	3210 assert(src_cp->destination() == destination,
a61af66fc99e Initial load duke parents: diff changeset	3211 "first live obj in the space must match the destination");
a61af66fc99e Initial load duke parents: diff changeset	3212 assert(src_cp->partial_obj_size() == 0,
a61af66fc99e Initial load duke parents: diff changeset	3213 "a space cannot begin with a partial obj");
a61af66fc99e Initial load duke parents: diff changeset	3214
a61af66fc99e Initial load duke parents: diff changeset	3215 src_space_id = SpaceId(space_id);
a61af66fc99e Initial load duke parents: diff changeset	3216 src_space_top = space->top();
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3217 const size_t src_region_idx = sd.region(src_cp);
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3218 closure.set_source(sd.region_to_addr(src_region_idx));
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3219 return src_region_idx;
0 a61af66fc99e Initial load duke parents: diff changeset	3220 } else {
a61af66fc99e Initial load duke parents: diff changeset	3221 assert(src_cp->data_size() == 0, "sanity");
a61af66fc99e Initial load duke parents: diff changeset	3222 }
a61af66fc99e Initial load duke parents: diff changeset	3223 }
a61af66fc99e Initial load duke parents: diff changeset	3224 }
a61af66fc99e Initial load duke parents: diff changeset	3225 } while (++space_id < last_space_id);
a61af66fc99e Initial load duke parents: diff changeset	3226
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3227 assert(false, "no source region was found");
0 a61af66fc99e Initial load duke parents: diff changeset	3228 return 0;
a61af66fc99e Initial load duke parents: diff changeset	3229 }
a61af66fc99e Initial load duke parents: diff changeset	3230
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3231 void PSParallelCompact::fill_region(ParCompactionManager* cm, size_t region_idx)
0 a61af66fc99e Initial load duke parents: diff changeset	3232 {
a61af66fc99e Initial load duke parents: diff changeset	3233 typedef ParMarkBitMap::IterationStatus IterationStatus;
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3234 const size_t RegionSize = ParallelCompactData::RegionSize;
0 a61af66fc99e Initial load duke parents: diff changeset	3235 ParMarkBitMap* const bitmap = mark_bitmap();
a61af66fc99e Initial load duke parents: diff changeset	3236 ParallelCompactData& sd = summary_data();
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3237 RegionData* const region_ptr = sd.region(region_idx);
0 a61af66fc99e Initial load duke parents: diff changeset	3238
a61af66fc99e Initial load duke parents: diff changeset	3239 // Get the items needed to construct the closure.
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3240 HeapWord* dest_addr = sd.region_to_addr(region_idx);
0 a61af66fc99e Initial load duke parents: diff changeset	3241 SpaceId dest_space_id = space_id(dest_addr);
a61af66fc99e Initial load duke parents: diff changeset	3242 ObjectStartArray* start_array = _space_info[dest_space_id].start_array();
a61af66fc99e Initial load duke parents: diff changeset	3243 HeapWord* new_top = _space_info[dest_space_id].new_top();
a61af66fc99e Initial load duke parents: diff changeset	3244 assert(dest_addr < new_top, "sanity");
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3245 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	3246
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3247 // Get the source region and related info.
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3248 size_t src_region_idx = region_ptr->source_region();
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3249 SpaceId src_space_id = space_id(sd.region_to_addr(src_region_idx));
0 a61af66fc99e Initial load duke parents: diff changeset	3250 HeapWord* src_space_top = _space_info[src_space_id].space()->top();
a61af66fc99e Initial load duke parents: diff changeset	3251
a61af66fc99e Initial load duke parents: diff changeset	3252 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	3253 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	3254
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3255 // 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	3256 // 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	3257 if (src_region_idx == region_idx) {
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3258 src_region_idx += 1;
0 a61af66fc99e Initial load duke parents: diff changeset	3259 }
a61af66fc99e Initial load duke parents: diff changeset	3260
a61af66fc99e Initial load duke parents: diff changeset	3261 if (bitmap->is_unmarked(closure.source())) {
a61af66fc99e Initial load duke parents: diff changeset	3262 // The first source word is in the middle of an object; copy the remainder
a61af66fc99e Initial load duke parents: diff changeset	3263 // of the object or as much as will fit. The fact that pointer updates were
a61af66fc99e Initial load duke parents: diff changeset	3264 // deferred will be noted when the object header is processed.
a61af66fc99e Initial load duke parents: diff changeset	3265 HeapWord* const old_src_addr = closure.source();
a61af66fc99e Initial load duke parents: diff changeset	3266 closure.copy_partial_obj();
a61af66fc99e Initial load duke parents: diff changeset	3267 if (closure.is_full()) {
495 234c22e54b98 6784849: par compact - can fail when to_space is non-empty jcoomes parents: 483 diff changeset	3268 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	3269 closure.source());
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3270 region_ptr->set_deferred_obj_addr(NULL);
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3271 region_ptr->set_completed();
0 a61af66fc99e Initial load duke parents: diff changeset	3272 return;
a61af66fc99e Initial load duke parents: diff changeset	3273 }
a61af66fc99e Initial load duke parents: diff changeset	3274
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3275 HeapWord* const end_addr = sd.region_align_down(closure.source());
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3276 if (sd.region_align_down(old_src_addr) != end_addr) {
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3277 // 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	3278 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	3279
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3280 // Move to the next source region, possibly switching spaces as well. All
0 a61af66fc99e Initial load duke parents: diff changeset	3281 // args except end_addr may be modified.
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3282 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	3283 end_addr);
0 a61af66fc99e Initial load duke parents: diff changeset	3284 }
a61af66fc99e Initial load duke parents: diff changeset	3285 }
a61af66fc99e Initial load duke parents: diff changeset	3286
a61af66fc99e Initial load duke parents: diff changeset	3287 do {
a61af66fc99e Initial load duke parents: diff changeset	3288 HeapWord* const cur_addr = closure.source();
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3289 HeapWord* const end_addr = MIN2(sd.region_align_up(cur_addr + 1),
0 a61af66fc99e Initial load duke parents: diff changeset	3290 src_space_top);
a61af66fc99e Initial load duke parents: diff changeset	3291 IterationStatus status = bitmap->iterate(&closure, cur_addr, end_addr);
a61af66fc99e Initial load duke parents: diff changeset	3292
a61af66fc99e Initial load duke parents: diff changeset	3293 if (status == ParMarkBitMap::incomplete) {
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3294 // 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	3295 // region.
1489 cff162798819 6888953: some calls to function-like macros are missing semicolons jcoomes parents: 1387 diff changeset	3296 assert(closure.source() < end_addr, "sanity");
0 a61af66fc99e Initial load duke parents: diff changeset	3297 HeapWord* const obj_beg = closure.source();
a61af66fc99e Initial load duke parents: diff changeset	3298 HeapWord* const range_end = MIN2(obj_beg + closure.words_remaining(),
a61af66fc99e Initial load duke parents: diff changeset	3299 src_space_top);
a61af66fc99e Initial load duke parents: diff changeset	3300 HeapWord* const obj_end = bitmap->find_obj_end(obj_beg, range_end);
a61af66fc99e Initial load duke parents: diff changeset	3301 if (obj_end < range_end) {
a61af66fc99e Initial load duke parents: diff changeset	3302 // The end was found; the entire object will fit.
a61af66fc99e Initial load duke parents: diff changeset	3303 status = closure.do_addr(obj_beg, bitmap->obj_size(obj_beg, obj_end));
a61af66fc99e Initial load duke parents: diff changeset	3304 assert(status != ParMarkBitMap::would_overflow, "sanity");
a61af66fc99e Initial load duke parents: diff changeset	3305 } else {
a61af66fc99e Initial load duke parents: diff changeset	3306 // The end was not found; the object will not fit.
a61af66fc99e Initial load duke parents: diff changeset	3307 assert(range_end < src_space_top, "obj cannot cross space boundary");
a61af66fc99e Initial load duke parents: diff changeset	3308 status = ParMarkBitMap::would_overflow;
a61af66fc99e Initial load duke parents: diff changeset	3309 }
a61af66fc99e Initial load duke parents: diff changeset	3310 }
a61af66fc99e Initial load duke parents: diff changeset	3311
a61af66fc99e Initial load duke parents: diff changeset	3312 if (status == ParMarkBitMap::would_overflow) {
a61af66fc99e Initial load duke parents: diff changeset	3313 // 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	3314 // 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	3315 region_ptr->set_deferred_obj_addr(closure.destination());
0 a61af66fc99e Initial load duke parents: diff changeset	3316 status = closure.copy_until_full(); // copies from closure.source()
a61af66fc99e Initial load duke parents: diff changeset	3317
495 234c22e54b98 6784849: par compact - can fail when to_space is non-empty jcoomes parents: 483 diff changeset	3318 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	3319 closure.source());
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3320 region_ptr->set_completed();
0 a61af66fc99e Initial load duke parents: diff changeset	3321 return;
a61af66fc99e Initial load duke parents: diff changeset	3322 }
a61af66fc99e Initial load duke parents: diff changeset	3323
a61af66fc99e Initial load duke parents: diff changeset	3324 if (status == ParMarkBitMap::full) {
495 234c22e54b98 6784849: par compact - can fail when to_space is non-empty jcoomes parents: 483 diff changeset	3325 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	3326 closure.source());
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3327 region_ptr->set_deferred_obj_addr(NULL);
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3328 region_ptr->set_completed();
0 a61af66fc99e Initial load duke parents: diff changeset	3329 return;
a61af66fc99e Initial load duke parents: diff changeset	3330 }
a61af66fc99e Initial load duke parents: diff changeset	3331
495 234c22e54b98 6784849: par compact - can fail when to_space is non-empty jcoomes parents: 483 diff changeset	3332 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	3333
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3334 // Move to the next source region, possibly switching spaces as well. All
0 a61af66fc99e Initial load duke parents: diff changeset	3335 // args except end_addr may be modified.
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3336 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	3337 end_addr);
0 a61af66fc99e Initial load duke parents: diff changeset	3338 } while (true);
a61af66fc99e Initial load duke parents: diff changeset	3339 }
a61af66fc99e Initial load duke parents: diff changeset	3340
a61af66fc99e Initial load duke parents: diff changeset	3341 void
a61af66fc99e Initial load duke parents: diff changeset	3342 PSParallelCompact::move_and_update(ParCompactionManager* cm, SpaceId space_id) {
a61af66fc99e Initial load duke parents: diff changeset	3343 const MutableSpace* sp = space(space_id);
a61af66fc99e Initial load duke parents: diff changeset	3344 if (sp->is_empty()) {
a61af66fc99e Initial load duke parents: diff changeset	3345 return;
a61af66fc99e Initial load duke parents: diff changeset	3346 }
a61af66fc99e Initial load duke parents: diff changeset	3347
a61af66fc99e Initial load duke parents: diff changeset	3348 ParallelCompactData& sd = PSParallelCompact::summary_data();
a61af66fc99e Initial load duke parents: diff changeset	3349 ParMarkBitMap* const bitmap = mark_bitmap();
a61af66fc99e Initial load duke parents: diff changeset	3350 HeapWord* const dp_addr = dense_prefix(space_id);
a61af66fc99e Initial load duke parents: diff changeset	3351 HeapWord* beg_addr = sp->bottom();
a61af66fc99e Initial load duke parents: diff changeset	3352 HeapWord* end_addr = sp->top();
a61af66fc99e Initial load duke parents: diff changeset	3353
a61af66fc99e Initial load duke parents: diff changeset	3354 #ifdef ASSERT
a61af66fc99e Initial load duke parents: diff changeset	3355 assert(beg_addr <= dp_addr && dp_addr <= end_addr, "bad dense prefix");
a61af66fc99e Initial load duke parents: diff changeset	3356 if (cm->should_verify_only()) {
a61af66fc99e Initial load duke parents: diff changeset	3357 VerifyUpdateClosure verify_update(cm, sp);
a61af66fc99e Initial load duke parents: diff changeset	3358 bitmap->iterate(&verify_update, beg_addr, end_addr);
a61af66fc99e Initial load duke parents: diff changeset	3359 return;
a61af66fc99e Initial load duke parents: diff changeset	3360 }
a61af66fc99e Initial load duke parents: diff changeset	3361
a61af66fc99e Initial load duke parents: diff changeset	3362 if (cm->should_reset_only()) {
a61af66fc99e Initial load duke parents: diff changeset	3363 ResetObjectsClosure reset_objects(cm);
a61af66fc99e Initial load duke parents: diff changeset	3364 bitmap->iterate(&reset_objects, beg_addr, end_addr);
a61af66fc99e Initial load duke parents: diff changeset	3365 return;
a61af66fc99e Initial load duke parents: diff changeset	3366 }
a61af66fc99e Initial load duke parents: diff changeset	3367 #endif
a61af66fc99e Initial load duke parents: diff changeset	3368
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3369 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	3370 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	3371 if (beg_region < dp_region) {
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3372 update_and_deadwood_in_dense_prefix(cm, space_id, beg_region, dp_region);
0 a61af66fc99e Initial load duke parents: diff changeset	3373 }
a61af66fc99e Initial load duke parents: diff changeset	3374
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 374 diff changeset	3375 // 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	3376 // 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	3377 HeapWord* const dest_addr = sd.partial_obj_end(dp_region);
0 a61af66fc99e Initial load duke parents: diff changeset	3378 HeapWord* const new_top = _space_info[space_id].new_top();
a61af66fc99e Initial load duke parents: diff changeset	3379 assert(new_top >= dest_addr, "bad new_top value");
a61af66fc99e Initial load duke parents: diff changeset	3380 const size_t words = pointer_delta(new_top, dest_addr);
a61af66fc99e Initial load duke parents: diff changeset	3381
a61af66fc99e Initial load duke parents: diff changeset	3382 if (words > 0) {
a61af66fc99e Initial load duke parents: diff changeset	3383 ObjectStartArray* start_array = _space_info[space_id].start_array();
a61af66fc99e Initial load duke parents: diff changeset	3384 MoveAndUpdateClosure closure(bitmap, cm, start_array, dest_addr, words);
a61af66fc99e Initial load duke parents: diff changeset	3385
a61af66fc99e Initial load duke parents: diff changeset	3386 ParMarkBitMap::IterationStatus status;
a61af66fc99e Initial load duke parents: diff changeset	3387 status = bitmap->iterate(&closure, dest_addr, end_addr);
a61af66fc99e Initial load duke parents: diff changeset	3388 assert(status == ParMarkBitMap::full, "iteration not complete");
a61af66fc99e Initial load duke parents: diff changeset	3389 assert(bitmap->find_obj_beg(closure.source(), end_addr) == end_addr,
a61af66fc99e Initial load duke parents: diff changeset	3390 "live objects skipped because closure is full");
a61af66fc99e Initial load duke parents: diff changeset	3391 }
a61af66fc99e Initial load duke parents: diff changeset	3392 }
a61af66fc99e Initial load duke parents: diff changeset	3393
a61af66fc99e Initial load duke parents: diff changeset	3394 jlong PSParallelCompact::millis_since_last_gc() {
a61af66fc99e Initial load duke parents: diff changeset	3395 jlong ret_val = os::javaTimeMillis() - _time_of_last_gc;
a61af66fc99e Initial load duke parents: diff changeset	3396 // XXX See note in genCollectedHeap::millis_since_last_gc().
a61af66fc99e Initial load duke parents: diff changeset	3397 if (ret_val < 0) {
a61af66fc99e Initial load duke parents: diff changeset	3398 NOT_PRODUCT(warning("time warp: %d", ret_val);)
a61af66fc99e Initial load duke parents: diff changeset	3399 return 0;
a61af66fc99e Initial load duke parents: diff changeset	3400 }
a61af66fc99e Initial load duke parents: diff changeset	3401 return ret_val;
a61af66fc99e Initial load duke parents: diff changeset	3402 }
a61af66fc99e Initial load duke parents: diff changeset	3403
a61af66fc99e Initial load duke parents: diff changeset	3404 void PSParallelCompact::reset_millis_since_last_gc() {
a61af66fc99e Initial load duke parents: diff changeset	3405 _time_of_last_gc = os::javaTimeMillis();
a61af66fc99e Initial load duke parents: diff changeset	3406 }
a61af66fc99e Initial load duke parents: diff changeset	3407
a61af66fc99e Initial load duke parents: diff changeset	3408 ParMarkBitMap::IterationStatus MoveAndUpdateClosure::copy_until_full()
a61af66fc99e Initial load duke parents: diff changeset	3409 {
a61af66fc99e Initial load duke parents: diff changeset	3410 if (source() != destination()) {
495 234c22e54b98 6784849: par compact - can fail when to_space is non-empty jcoomes parents: 483 diff changeset	3411 DEBUG_ONLY(PSParallelCompact::check_new_location(source(), destination());)
0 a61af66fc99e Initial load duke parents: diff changeset	3412 Copy::aligned_conjoint_words(source(), destination(), words_remaining());
a61af66fc99e Initial load duke parents: diff changeset	3413 }
a61af66fc99e Initial load duke parents: diff changeset	3414 update_state(words_remaining());
a61af66fc99e Initial load duke parents: diff changeset	3415 assert(is_full(), "sanity");
a61af66fc99e Initial load duke parents: diff changeset	3416 return ParMarkBitMap::full;
a61af66fc99e Initial load duke parents: diff changeset	3417 }
a61af66fc99e Initial load duke parents: diff changeset	3418
a61af66fc99e Initial load duke parents: diff changeset	3419 void MoveAndUpdateClosure::copy_partial_obj()
a61af66fc99e Initial load duke parents: diff changeset	3420 {
a61af66fc99e Initial load duke parents: diff changeset	3421 size_t words = words_remaining();
a61af66fc99e Initial load duke parents: diff changeset	3422
a61af66fc99e Initial load duke parents: diff changeset	3423 HeapWord* const range_end = MIN2(source() + words, bitmap()->region_end());
a61af66fc99e Initial load duke parents: diff changeset	3424 HeapWord* const end_addr = bitmap()->find_obj_end(source(), range_end);
a61af66fc99e Initial load duke parents: diff changeset	3425 if (end_addr < range_end) {
a61af66fc99e Initial load duke parents: diff changeset	3426 words = bitmap()->obj_size(source(), end_addr);
a61af66fc99e Initial load duke parents: diff changeset	3427 }
a61af66fc99e Initial load duke parents: diff changeset	3428
a61af66fc99e Initial load duke parents: diff changeset	3429 // This test is necessary; if omitted, the pointer updates to a partial object
a61af66fc99e Initial load duke parents: diff changeset	3430 // that crosses the dense prefix boundary could be overwritten.
a61af66fc99e Initial load duke parents: diff changeset	3431 if (source() != destination()) {
495 234c22e54b98 6784849: par compact - can fail when to_space is non-empty jcoomes parents: 483 diff changeset	3432 DEBUG_ONLY(PSParallelCompact::check_new_location(source(), destination());)
0 a61af66fc99e Initial load duke parents: diff changeset	3433 Copy::aligned_conjoint_words(source(), destination(), words);
a61af66fc99e Initial load duke parents: diff changeset	3434 }
a61af66fc99e Initial load duke parents: diff changeset	3435 update_state(words);
a61af66fc99e Initial load duke parents: diff changeset	3436 }
a61af66fc99e Initial load duke parents: diff changeset	3437
a61af66fc99e Initial load duke parents: diff changeset	3438 ParMarkBitMapClosure::IterationStatus
a61af66fc99e Initial load duke parents: diff changeset	3439 MoveAndUpdateClosure::do_addr(HeapWord* addr, size_t words) {
a61af66fc99e Initial load duke parents: diff changeset	3440 assert(destination() != NULL, "sanity");
a61af66fc99e Initial load duke parents: diff changeset	3441 assert(bitmap()->obj_size(addr) == words, "bad size");
a61af66fc99e Initial load duke parents: diff changeset	3442
a61af66fc99e Initial load duke parents: diff changeset	3443 _source = addr;
a61af66fc99e Initial load duke parents: diff changeset	3444 assert(PSParallelCompact::summary_data().calc_new_pointer(source()) ==
a61af66fc99e Initial load duke parents: diff changeset	3445 destination(), "wrong destination");
a61af66fc99e Initial load duke parents: diff changeset	3446
a61af66fc99e Initial load duke parents: diff changeset	3447 if (words > words_remaining()) {
a61af66fc99e Initial load duke parents: diff changeset	3448 return ParMarkBitMap::would_overflow;
a61af66fc99e Initial load duke parents: diff changeset	3449 }
a61af66fc99e Initial load duke parents: diff changeset	3450
a61af66fc99e Initial load duke parents: diff changeset	3451 // The start_array must be updated even if the object is not moving.
a61af66fc99e Initial load duke parents: diff changeset	3452 if (_start_array != NULL) {
a61af66fc99e Initial load duke parents: diff changeset	3453 _start_array->allocate_block(destination());
a61af66fc99e Initial load duke parents: diff changeset	3454 }
a61af66fc99e Initial load duke parents: diff changeset	3455
a61af66fc99e Initial load duke parents: diff changeset	3456 if (destination() != source()) {
495 234c22e54b98 6784849: par compact - can fail when to_space is non-empty jcoomes parents: 483 diff changeset	3457 DEBUG_ONLY(PSParallelCompact::check_new_location(source(), destination());)
0 a61af66fc99e Initial load duke parents: diff changeset	3458 Copy::aligned_conjoint_words(source(), destination(), words);
a61af66fc99e Initial load duke parents: diff changeset	3459 }
a61af66fc99e Initial load duke parents: diff changeset	3460
a61af66fc99e Initial load duke parents: diff changeset	3461 oop moved_oop = (oop) destination();
a61af66fc99e Initial load duke parents: diff changeset	3462 moved_oop->update_contents(compaction_manager());
a61af66fc99e Initial load duke parents: diff changeset	3463 assert(moved_oop->is_oop_or_null(), "Object should be whole at this point");
a61af66fc99e Initial load duke parents: diff changeset	3464
a61af66fc99e Initial load duke parents: diff changeset	3465 update_state(words);
a61af66fc99e Initial load duke parents: diff changeset	3466 assert(destination() == (HeapWord*)moved_oop + moved_oop->size(), "sanity");
a61af66fc99e Initial load duke parents: diff changeset	3467 return is_full() ? ParMarkBitMap::full : ParMarkBitMap::incomplete;
a61af66fc99e Initial load duke parents: diff changeset	3468 }
a61af66fc99e Initial load duke parents: diff changeset	3469
a61af66fc99e Initial load duke parents: diff changeset	3470 UpdateOnlyClosure::UpdateOnlyClosure(ParMarkBitMap* mbm,
a61af66fc99e Initial load duke parents: diff changeset	3471 ParCompactionManager* cm,
a61af66fc99e Initial load duke parents: diff changeset	3472 PSParallelCompact::SpaceId space_id) :
a61af66fc99e Initial load duke parents: diff changeset	3473 ParMarkBitMapClosure(mbm, cm),
a61af66fc99e Initial load duke parents: diff changeset	3474 _space_id(space_id),
a61af66fc99e Initial load duke parents: diff changeset	3475 _start_array(PSParallelCompact::start_array(space_id))
a61af66fc99e Initial load duke parents: diff changeset	3476 {
a61af66fc99e Initial load duke parents: diff changeset	3477 }
a61af66fc99e Initial load duke parents: diff changeset	3478
a61af66fc99e Initial load duke parents: diff changeset	3479 // Updates the references in the object to their new values.
a61af66fc99e Initial load duke parents: diff changeset	3480 ParMarkBitMapClosure::IterationStatus
a61af66fc99e Initial load duke parents: diff changeset	3481 UpdateOnlyClosure::do_addr(HeapWord* addr, size_t words) {
a61af66fc99e Initial load duke parents: diff changeset	3482 do_addr(addr);
a61af66fc99e Initial load duke parents: diff changeset	3483 return ParMarkBitMap::incomplete;
a61af66fc99e Initial load duke parents: diff changeset	3484 }
a61af66fc99e Initial load duke parents: diff changeset	3485
a61af66fc99e Initial load duke parents: diff changeset	3486 // Verify the new location using the forwarding pointer
a61af66fc99e Initial load duke parents: diff changeset	3487 // from MarkSweep::mark_sweep_phase2(). Set the mark_word
a61af66fc99e Initial load duke parents: diff changeset	3488 // to the initial value.
a61af66fc99e Initial load duke parents: diff changeset	3489 ParMarkBitMapClosure::IterationStatus
a61af66fc99e Initial load duke parents: diff changeset	3490 PSParallelCompact::VerifyUpdateClosure::do_addr(HeapWord* addr, size_t words) {
a61af66fc99e Initial load duke parents: diff changeset	3491 // The second arg (words) is not used.
a61af66fc99e Initial load duke parents: diff changeset	3492 oop obj = (oop) addr;
a61af66fc99e Initial load duke parents: diff changeset	3493 HeapWord* forwarding_ptr = (HeapWord*) obj->mark()->decode_pointer();
a61af66fc99e Initial load duke parents: diff changeset	3494 HeapWord* new_pointer = summary_data().calc_new_pointer(obj);
a61af66fc99e Initial load duke parents: diff changeset	3495 if (forwarding_ptr == NULL) {
a61af66fc99e Initial load duke parents: diff changeset	3496 // The object is dead or not moving.
a61af66fc99e Initial load duke parents: diff changeset	3497 assert(bitmap()->is_unmarked(obj) \|\| (new_pointer == (HeapWord*) obj),
a61af66fc99e Initial load duke parents: diff changeset	3498 "Object liveness is wrong.");
a61af66fc99e Initial load duke parents: diff changeset	3499 return ParMarkBitMap::incomplete;
a61af66fc99e Initial load duke parents: diff changeset	3500 }
a61af66fc99e Initial load duke parents: diff changeset	3501 assert(UseParallelOldGCDensePrefix \|\|
a61af66fc99e Initial load duke parents: diff changeset	3502 (HeapMaximumCompactionInterval > 1) \|\|
a61af66fc99e Initial load duke parents: diff changeset	3503 (MarkSweepAlwaysCompactCount > 1) \|\|
a61af66fc99e Initial load duke parents: diff changeset	3504 (forwarding_ptr == new_pointer),
a61af66fc99e Initial load duke parents: diff changeset	3505 "Calculation of new location is incorrect");
a61af66fc99e Initial load duke parents: diff changeset	3506 return ParMarkBitMap::incomplete;
a61af66fc99e Initial load duke parents: diff changeset	3507 }
a61af66fc99e Initial load duke parents: diff changeset	3508
a61af66fc99e Initial load duke parents: diff changeset	3509 // Reset objects modified for debug checking.
a61af66fc99e Initial load duke parents: diff changeset	3510 ParMarkBitMapClosure::IterationStatus
a61af66fc99e Initial load duke parents: diff changeset	3511 PSParallelCompact::ResetObjectsClosure::do_addr(HeapWord* addr, size_t words) {
a61af66fc99e Initial load duke parents: diff changeset	3512 // The second arg (words) is not used.
a61af66fc99e Initial load duke parents: diff changeset	3513 oop obj = (oop) addr;
a61af66fc99e Initial load duke parents: diff changeset	3514 obj->init_mark();
a61af66fc99e Initial load duke parents: diff changeset	3515 return ParMarkBitMap::incomplete;
a61af66fc99e Initial load duke parents: diff changeset	3516 }
a61af66fc99e Initial load duke parents: diff changeset	3517
a61af66fc99e Initial load duke parents: diff changeset	3518 // Prepare for compaction. This method is executed once
a61af66fc99e Initial load duke parents: diff changeset	3519 // (i.e., by a single thread) before compaction.
a61af66fc99e Initial load duke parents: diff changeset	3520 // Save the updated location of the intArrayKlassObj for
a61af66fc99e Initial load duke parents: diff changeset	3521 // filling holes in the dense prefix.
a61af66fc99e Initial load duke parents: diff changeset	3522 void PSParallelCompact::compact_prologue() {
a61af66fc99e Initial load duke parents: diff changeset	3523 _updated_int_array_klass_obj = (klassOop)
a61af66fc99e Initial load duke parents: diff changeset	3524 summary_data().calc_new_pointer(Universe::intArrayKlassObj());
a61af66fc99e Initial load duke parents: diff changeset	3525 }
a61af66fc99e Initial load duke parents: diff changeset	3526

Mercurial > hg > graal-compiler

annotate src/share/vm/gc_implementation/parallelScavenge/psParallelCompact.cpp @ 1836:894b1d7c7e01