truffle: src/share/vm/gc_implementation/g1/concurrentMark.cpp annotate

annotate src/share/vm/gc_implementation/g1/concurrentMark.cpp @ 12229:ff218fdb30ba

8021823: G1: Concurrent marking crashes with -XX:ObjectAlignmentInBytes>=32 in 64bit VMs Summary: Correctly calculate the initialization value for the shift between object start and bitmap bit in the G1 mark bitmaps. Reviewed-by: tonyp

author	tschatzl
date	Wed, 11 Sep 2013 10:19:16 +0200
parents	5888334c9c24
children	190899198332

rev	line source
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1 /*
7450 d275c3dc73e6 8004816: G1: Kitchensink failures after marking stack changes johnc parents: 7397 diff changeset	2 * Copyright (c) 2001, 2013, Oracle and/or its affiliates. All rights reserved.
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4 *
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	5 * This code is free software; you can redistribute it and/or modify it
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	6 * under the terms of the GNU General Public License version 2 only, as
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	7 * published by the Free Software Foundation.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	8 *
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	9 * This code is distributed in the hope that it will be useful, but WITHOUT
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	12 * version 2 for more details (a copy is included in the LICENSE file that
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	13 * accompanied this code).
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	14 *
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	15 * You should have received a copy of the GNU General Public License version
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	16 * 2 along with this work; if not, write to the Free Software Foundation,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	18 *
1552 c18cbe5936b8 6941466: Oracle rebranding changes for Hotspot repositories trims parents: 1547 diff changeset	19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
c18cbe5936b8 6941466: Oracle rebranding changes for Hotspot repositories trims parents: 1547 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: 1547 diff changeset	21 * questions.
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	22 *
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	23 */
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	24
1972 f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1885 diff changeset	25 #include "precompiled.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1885 diff changeset	26 #include "classfile/symbolTable.hpp"
3771 842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	27 #include "gc_implementation/g1/concurrentMark.inline.hpp"
1972 f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1885 diff changeset	28 #include "gc_implementation/g1/concurrentMarkThread.inline.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1885 diff changeset	29 #include "gc_implementation/g1/g1CollectedHeap.inline.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1885 diff changeset	30 #include "gc_implementation/g1/g1CollectorPolicy.hpp"
3914 20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3867 diff changeset	31 #include "gc_implementation/g1/g1ErgoVerbose.hpp"
6007 5c86f8211d1e 7160728: Introduce an extra logging level for G1 logging brutisso parents: 5988 diff changeset	32 #include "gc_implementation/g1/g1Log.hpp"
3771 842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	33 #include "gc_implementation/g1/g1OopClosures.inline.hpp"
1972 f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1885 diff changeset	34 #include "gc_implementation/g1/g1RemSet.hpp"
4787 2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	35 #include "gc_implementation/g1/heapRegion.inline.hpp"
1972 f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1885 diff changeset	36 #include "gc_implementation/g1/heapRegionRemSet.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1885 diff changeset	37 #include "gc_implementation/g1/heapRegionSeq.inline.hpp"
2125 7246a374a9f2 6458402: 3 jvmti tests fail with CMS and +ExplicitGCInvokesConcurrent kamg parents: 2037 diff changeset	38 #include "gc_implementation/shared/vmGCOperations.hpp"
10405 f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10290 diff changeset	39 #include "gc_implementation/shared/gcTimer.hpp"
f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10290 diff changeset	40 #include "gc_implementation/shared/gcTrace.hpp"
f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10290 diff changeset	41 #include "gc_implementation/shared/gcTraceTime.hpp"
1972 f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1885 diff changeset	42 #include "memory/genOopClosures.inline.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1885 diff changeset	43 #include "memory/referencePolicy.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1885 diff changeset	44 #include "memory/resourceArea.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1885 diff changeset	45 #include "oops/oop.inline.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1885 diff changeset	46 #include "runtime/handles.inline.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1885 diff changeset	47 #include "runtime/java.hpp"
6197 d2a62e0f25eb 6995781: Native Memory Tracking (Phase 1) zgu parents: 6027 diff changeset	48 #include "services/memTracker.hpp"
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	49
4828 851b58c26def 7130334: G1: Change comments and error messages that refer to CMS in g1/concurrentMark.cpp/hpp brutisso parents: 4827 diff changeset	50 // Concurrent marking bit map wrapper
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	51
7397 442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	52 CMBitMapRO::CMBitMapRO(int shifter) :
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	53 _bm(),
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	54 _shifter(shifter) {
7397 442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	55 _bmStartWord = 0;
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	56 _bmWordSize = 0;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	57 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	58
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	59 HeapWord* CMBitMapRO::getNextMarkedWordAddress(HeapWord* addr,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	60 HeapWord* limit) const {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	61 // First we must round addr up to a possible object boundary.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	62 addr = (HeapWord*)align_size_up((intptr_t)addr,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	63 HeapWordSize << _shifter);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	64 size_t addrOffset = heapWordToOffset(addr);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	65 if (limit == NULL) {
23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	66 limit = _bmStartWord + _bmWordSize;
23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	67 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	68 size_t limitOffset = heapWordToOffset(limit);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	69 size_t nextOffset = _bm.get_next_one_offset(addrOffset, limitOffset);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	70 HeapWord* nextAddr = offsetToHeapWord(nextOffset);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	71 assert(nextAddr >= addr, "get_next_one postcondition");
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	72 assert(nextAddr == limit \|\| isMarked(nextAddr),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	73 "get_next_one postcondition");
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	74 return nextAddr;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	75 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	76
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	77 HeapWord* CMBitMapRO::getNextUnmarkedWordAddress(HeapWord* addr,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	78 HeapWord* limit) const {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	79 size_t addrOffset = heapWordToOffset(addr);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	80 if (limit == NULL) {
23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	81 limit = _bmStartWord + _bmWordSize;
23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	82 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	83 size_t limitOffset = heapWordToOffset(limit);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	84 size_t nextOffset = _bm.get_next_zero_offset(addrOffset, limitOffset);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	85 HeapWord* nextAddr = offsetToHeapWord(nextOffset);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	86 assert(nextAddr >= addr, "get_next_one postcondition");
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	87 assert(nextAddr == limit \|\| !isMarked(nextAddr),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	88 "get_next_one postcondition");
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	89 return nextAddr;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	90 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	91
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	92 int CMBitMapRO::heapWordDiffToOffsetDiff(size_t diff) const {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	93 assert((diff & ((1 << _shifter) - 1)) == 0, "argument check");
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	94 return (int) (diff >> _shifter);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	95 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	96
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	97 #ifndef PRODUCT
7397 442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	98 bool CMBitMapRO::covers(ReservedSpace heap_rs) const {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	99 // assert(_bm.map() == _virtual_space.low(), "map inconsistency");
6750 859cd1a76f8a 7197906: BlockOffsetArray::power_to_cards_back() needs to handle > 32 bit shifts brutisso parents: 6725 diff changeset	100 assert(((size_t)_bm.size() * ((size_t)1 << _shifter)) == _bmWordSize,
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	101 "size inconsistency");
7397 442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	102 return _bmStartWord == (HeapWord*)(heap_rs.base()) &&
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	103 _bmWordSize == heap_rs.size()>>LogHeapWordSize;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	104 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	105 #endif
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	106
9076 7b835924c31c 8011872: Include Bit Map addresses in the hs_err files stefank parents: 8789 diff changeset	107 void CMBitMapRO::print_on_error(outputStream* st, const char* prefix) const {
7b835924c31c 8011872: Include Bit Map addresses in the hs_err files stefank parents: 8789 diff changeset	108 _bm.print_on_error(st, prefix);
7b835924c31c 8011872: Include Bit Map addresses in the hs_err files stefank parents: 8789 diff changeset	109 }
7b835924c31c 8011872: Include Bit Map addresses in the hs_err files stefank parents: 8789 diff changeset	110
7397 442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	111 bool CMBitMap::allocate(ReservedSpace heap_rs) {
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	112 _bmStartWord = (HeapWord*)(heap_rs.base());
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	113 _bmWordSize = heap_rs.size()/HeapWordSize; // heap_rs.size() is in bytes
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	114 ReservedSpace brs(ReservedSpace::allocation_align_size_up(
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	115 (_bmWordSize >> (_shifter + LogBitsPerByte)) + 1));
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	116 if (!brs.is_reserved()) {
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	117 warning("ConcurrentMark marking bit map allocation failure");
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	118 return false;
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	119 }
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	120 MemTracker::record_virtual_memory_type((address)brs.base(), mtGC);
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	121 // For now we'll just commit all of the bit map up front.
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	122 // Later on we'll try to be more parsimonious with swap.
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	123 if (!_virtual_space.initialize(brs, brs.size())) {
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	124 warning("ConcurrentMark marking bit map backing store failure");
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	125 return false;
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	126 }
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	127 assert(_virtual_space.committed_size() == brs.size(),
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	128 "didn't reserve backing store for all of concurrent marking bit map?");
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	129 _bm.set_map((uintptr_t*)_virtual_space.low());
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	130 assert(_virtual_space.committed_size() << (_shifter + LogBitsPerByte) >=
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	131 _bmWordSize, "inconsistency in bit map sizing");
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	132 _bm.set_size(_bmWordSize >> _shifter);
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	133 return true;
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	134 }
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	135
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	136 void CMBitMap::clearAll() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	137 _bm.clear();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	138 return;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	139 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	140
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	141 void CMBitMap::markRange(MemRegion mr) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	142 mr.intersection(MemRegion(_bmStartWord, _bmWordSize));
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	143 assert(!mr.is_empty(), "unexpected empty region");
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	144 assert((offsetToHeapWord(heapWordToOffset(mr.end())) ==
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	145 ((HeapWord *) mr.end())),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	146 "markRange memory region end is not card aligned");
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	147 // convert address range into offset range
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	148 _bm.at_put_range(heapWordToOffset(mr.start()),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	149 heapWordToOffset(mr.end()), true);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	150 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	151
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	152 void CMBitMap::clearRange(MemRegion mr) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	153 mr.intersection(MemRegion(_bmStartWord, _bmWordSize));
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	154 assert(!mr.is_empty(), "unexpected empty region");
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	155 // convert address range into offset range
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	156 _bm.at_put_range(heapWordToOffset(mr.start()),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	157 heapWordToOffset(mr.end()), false);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	158 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	159
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	160 MemRegion CMBitMap::getAndClearMarkedRegion(HeapWord* addr,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	161 HeapWord* end_addr) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	162 HeapWord* start = getNextMarkedWordAddress(addr);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	163 start = MIN2(start, end_addr);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	164 HeapWord* end = getNextUnmarkedWordAddress(start);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	165 end = MIN2(end, end_addr);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	166 assert(start <= end, "Consistency check");
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	167 MemRegion mr(start, end);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	168 if (!mr.is_empty()) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	169 clearRange(mr);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	170 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	171 return mr;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	172 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	173
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	174 CMMarkStack::CMMarkStack(ConcurrentMark* cm) :
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	175 _base(NULL), _cm(cm)
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	176 #ifdef ASSERT
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	177 , _drain_in_progress(false)
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	178 , _drain_in_progress_yields(false)
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	179 #endif
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	180 {}
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	181
7397 442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	182 bool CMMarkStack::allocate(size_t capacity) {
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	183 // allocate a stack of the requisite depth
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	184 ReservedSpace rs(ReservedSpace::allocation_align_size_up(capacity * sizeof(oop)));
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	185 if (!rs.is_reserved()) {
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	186 warning("ConcurrentMark MarkStack allocation failure");
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	187 return false;
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	188 }
7397 442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	189 MemTracker::record_virtual_memory_type((address)rs.base(), mtGC);
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	190 if (!_virtual_space.initialize(rs, rs.size())) {
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	191 warning("ConcurrentMark MarkStack backing store failure");
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	192 // Release the virtual memory reserved for the marking stack
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	193 rs.release();
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	194 return false;
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	195 }
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	196 assert(_virtual_space.committed_size() == rs.size(),
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	197 "Didn't reserve backing store for all of ConcurrentMark stack?");
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	198 _base = (oop*) _virtual_space.low();
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	199 setEmpty();
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	200 _capacity = (jint) capacity;
4787 2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	201 _saved_index = -1;
7450 d275c3dc73e6 8004816: G1: Kitchensink failures after marking stack changes johnc parents: 7397 diff changeset	202 _should_expand = false;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	203 NOT_PRODUCT(_max_depth = 0);
7397 442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	204 return true;
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	205 }
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	206
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	207 void CMMarkStack::expand() {
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	208 // Called, during remark, if we've overflown the marking stack during marking.
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	209 assert(isEmpty(), "stack should been emptied while handling overflow");
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	210 assert(_capacity <= (jint) MarkStackSizeMax, "stack bigger than permitted");
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	211 // Clear expansion flag
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	212 _should_expand = false;
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	213 if (_capacity == (jint) MarkStackSizeMax) {
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	214 if (PrintGCDetails && Verbose) {
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	215 gclog_or_tty->print_cr(" (benign) Can't expand marking stack capacity, at max size limit");
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	216 }
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	217 return;
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	218 }
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	219 // Double capacity if possible
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	220 jint new_capacity = MIN2(_capacity*2, (jint) MarkStackSizeMax);
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	221 // Do not give up existing stack until we have managed to
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	222 // get the double capacity that we desired.
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	223 ReservedSpace rs(ReservedSpace::allocation_align_size_up(new_capacity *
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	224 sizeof(oop)));
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	225 if (rs.is_reserved()) {
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	226 // Release the backing store associated with old stack
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	227 _virtual_space.release();
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	228 // Reinitialize virtual space for new stack
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	229 if (!_virtual_space.initialize(rs, rs.size())) {
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	230 fatal("Not enough swap for expanded marking stack capacity");
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	231 }
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	232 _base = (oop*)(_virtual_space.low());
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	233 _index = 0;
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	234 _capacity = new_capacity;
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	235 } else {
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	236 if (PrintGCDetails && Verbose) {
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	237 // Failed to double capacity, continue;
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	238 gclog_or_tty->print(" (benign) Failed to expand marking stack capacity from "
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	239 SIZE_FORMAT"K to " SIZE_FORMAT"K",
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	240 _capacity / K, new_capacity / K);
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	241 }
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	242 }
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	243 }
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	244
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	245 void CMMarkStack::set_should_expand() {
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	246 // If we're resetting the marking state because of an
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	247 // marking stack overflow, record that we should, if
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	248 // possible, expand the stack.
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	249 _should_expand = _cm->has_overflown();
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	250 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	251
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	252 CMMarkStack::~CMMarkStack() {
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	253 if (_base != NULL) {
7397 442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	254 _base = NULL;
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	255 _virtual_space.release();
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	256 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	257 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	258
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	259 void CMMarkStack::par_push(oop ptr) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	260 while (true) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	261 if (isFull()) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	262 _overflow = true;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	263 return;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	264 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	265 // Otherwise...
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	266 jint index = _index;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	267 jint next_index = index+1;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	268 jint res = Atomic::cmpxchg(next_index, &_index, index);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	269 if (res == index) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	270 _base[index] = ptr;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	271 // Note that we don't maintain this atomically. We could, but it
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	272 // doesn't seem necessary.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	273 NOT_PRODUCT(_max_depth = MAX2(_max_depth, next_index));
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	274 return;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	275 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	276 // Otherwise, we need to try again.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	277 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	278 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	279
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	280 void CMMarkStack::par_adjoin_arr(oop* ptr_arr, int n) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	281 while (true) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	282 if (isFull()) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	283 _overflow = true;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	284 return;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	285 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	286 // Otherwise...
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	287 jint index = _index;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	288 jint next_index = index + n;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	289 if (next_index > _capacity) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	290 _overflow = true;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	291 return;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	292 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	293 jint res = Atomic::cmpxchg(next_index, &_index, index);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	294 if (res == index) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	295 for (int i = 0; i < n; i++) {
7397 442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	296 int ind = index + i;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	297 assert(ind < _capacity, "By overflow test above.");
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	298 _base[ind] = ptr_arr[i];
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	299 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	300 NOT_PRODUCT(_max_depth = MAX2(_max_depth, next_index));
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	301 return;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	302 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	303 // Otherwise, we need to try again.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	304 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	305 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	306
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	307 void CMMarkStack::par_push_arr(oop* ptr_arr, int n) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	308 MutexLockerEx x(ParGCRareEvent_lock, Mutex::_no_safepoint_check_flag);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	309 jint start = _index;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	310 jint next_index = start + n;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	311 if (next_index > _capacity) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	312 _overflow = true;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	313 return;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	314 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	315 // Otherwise.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	316 _index = next_index;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	317 for (int i = 0; i < n; i++) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	318 int ind = start + i;
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	319 assert(ind < _capacity, "By overflow test above.");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	320 _base[ind] = ptr_arr[i];
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	321 }
7397 442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	322 NOT_PRODUCT(_max_depth = MAX2(_max_depth, next_index));
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	323 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	324
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	325 bool CMMarkStack::par_pop_arr(oop* ptr_arr, int max, int* n) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	326 MutexLockerEx x(ParGCRareEvent_lock, Mutex::_no_safepoint_check_flag);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	327 jint index = _index;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	328 if (index == 0) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	329 *n = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	330 return false;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	331 } else {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	332 int k = MIN2(max, index);
7397 442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	333 jint new_ind = index - k;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	334 for (int j = 0; j < k; j++) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	335 ptr_arr[j] = _base[new_ind + j];
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	336 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	337 _index = new_ind;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	338 *n = k;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	339 return true;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	340 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	341 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	343 template<class OopClosureClass>
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	344 bool CMMarkStack::drain(OopClosureClass* cl, CMBitMap* bm, bool yield_after) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	345 assert(!_drain_in_progress \|\| !_drain_in_progress_yields \|\| yield_after
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	346 \|\| SafepointSynchronize::is_at_safepoint(),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	347 "Drain recursion must be yield-safe.");
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	348 bool res = true;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	349 debug_only(_drain_in_progress = true);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	350 debug_only(_drain_in_progress_yields = yield_after);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	351 while (!isEmpty()) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	352 oop newOop = pop();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	353 assert(G1CollectedHeap::heap()->is_in_reserved(newOop), "Bad pop");
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	354 assert(newOop->is_oop(), "Expected an oop");
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	355 assert(bm == NULL \|\| bm->isMarked((HeapWord*)newOop),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	356 "only grey objects on this stack");
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	357 newOop->oop_iterate(cl);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	358 if (yield_after && _cm->do_yield_check()) {
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	359 res = false;
23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	360 break;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	361 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	362 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	363 debug_only(_drain_in_progress = false);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	364 return res;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	365 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	366
4787 2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	367 void CMMarkStack::note_start_of_gc() {
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	368 assert(_saved_index == -1,
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	369 "note_start_of_gc()/end_of_gc() bracketed incorrectly");
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	370 _saved_index = _index;
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	371 }
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	372
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	373 void CMMarkStack::note_end_of_gc() {
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	374 // This is intentionally a guarantee, instead of an assert. If we
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	375 // accidentally add something to the mark stack during GC, it
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	376 // will be a correctness issue so it's better if we crash. we'll
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	377 // only check this once per GC anyway, so it won't be a performance
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	378 // issue in any way.
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	379 guarantee(_saved_index == _index,
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	380 err_msg("saved index: %d index: %d", _saved_index, _index));
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	381 _saved_index = -1;
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	382 }
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	383
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	384 void CMMarkStack::oops_do(OopClosure* f) {
4787 2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	385 assert(_saved_index == _index,
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	386 err_msg("saved index: %d index: %d", _saved_index, _index));
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	387 for (int i = 0; i < _index; i += 1) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	388 f->do_oop(&_base[i]);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	389 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	390 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	391
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	392 bool ConcurrentMark::not_yet_marked(oop obj) const {
6725 da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6254 diff changeset	393 return _g1h->is_obj_ill(obj);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	394 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	395
4837 eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	396 CMRootRegions::CMRootRegions() :
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	397 _young_list(NULL), _cm(NULL), _scan_in_progress(false),
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	398 _should_abort(false), _next_survivor(NULL) { }
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	399
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	400 void CMRootRegions::init(G1CollectedHeap* g1h, ConcurrentMark* cm) {
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	401 _young_list = g1h->young_list();
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	402 _cm = cm;
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	403 }
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	404
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	405 void CMRootRegions::prepare_for_scan() {
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	406 assert(!scan_in_progress(), "pre-condition");
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	407
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	408 // Currently, only survivors can be root regions.
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	409 assert(_next_survivor == NULL, "pre-condition");
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	410 _next_survivor = _young_list->first_survivor_region();
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	411 _scan_in_progress = (_next_survivor != NULL);
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	412 _should_abort = false;
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	413 }
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	414
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	415 HeapRegion* CMRootRegions::claim_next() {
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	416 if (_should_abort) {
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	417 // If someone has set the should_abort flag, we return NULL to
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	418 // force the caller to bail out of their loop.
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	419 return NULL;
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	420 }
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	421
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	422 // Currently, only survivors can be root regions.
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	423 HeapRegion* res = _next_survivor;
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	424 if (res != NULL) {
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	425 MutexLockerEx x(RootRegionScan_lock, Mutex::_no_safepoint_check_flag);
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	426 // Read it again in case it changed while we were waiting for the lock.
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	427 res = _next_survivor;
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	428 if (res != NULL) {
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	429 if (res == _young_list->last_survivor_region()) {
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	430 // We just claimed the last survivor so store NULL to indicate
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	431 // that we're done.
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	432 _next_survivor = NULL;
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	433 } else {
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	434 _next_survivor = res->get_next_young_region();
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	435 }
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	436 } else {
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	437 // Someone else claimed the last survivor while we were trying
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	438 // to take the lock so nothing else to do.
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	439 }
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	440 }
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	441 assert(res == NULL \|\| res->is_survivor(), "post-condition");
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	442
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	443 return res;
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	444 }
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	445
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	446 void CMRootRegions::scan_finished() {
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	447 assert(scan_in_progress(), "pre-condition");
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	448
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	449 // Currently, only survivors can be root regions.
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	450 if (!_should_abort) {
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	451 assert(_next_survivor == NULL, "we should have claimed all survivors");
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	452 }
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	453 _next_survivor = NULL;
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	454
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	455 {
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	456 MutexLockerEx x(RootRegionScan_lock, Mutex::_no_safepoint_check_flag);
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	457 _scan_in_progress = false;
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	458 RootRegionScan_lock->notify_all();
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	459 }
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	460 }
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	461
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	462 bool CMRootRegions::wait_until_scan_finished() {
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	463 if (!scan_in_progress()) return false;
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	464
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	465 {
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	466 MutexLockerEx x(RootRegionScan_lock, Mutex::_no_safepoint_check_flag);
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	467 while (scan_in_progress()) {
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	468 RootRegionScan_lock->wait(Mutex::_no_safepoint_check_flag);
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	469 }
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	470 }
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	471 return true;
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	472 }
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	473
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	474 #ifdef _MSC_VER // the use of 'this' below gets a warning, make it go away
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	475 #pragma warning( disable:4355 ) // 'this' : used in base member initializer list
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	476 #endif // _MSC_VER
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	477
4728 441e946dc1af 7121618: Change type of number of GC workers to unsigned int. jmasa parents: 4711 diff changeset	478 uint ConcurrentMark::scale_parallel_threads(uint n_par_threads) {
441e946dc1af 7121618: Change type of number of GC workers to unsigned int. jmasa parents: 4711 diff changeset	479 return MAX2((n_par_threads + 2) / 4, 1U);
4095 bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	480 }
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	481
7397 442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	482 ConcurrentMark::ConcurrentMark(G1CollectedHeap* g1h, ReservedSpace heap_rs) :
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	483 _g1h(g1h),
12229 ff218fdb30ba 8021823: G1: Concurrent marking crashes with -XX:ObjectAlignmentInBytes>=32 in 64bit VMs tschatzl parents: 12080 diff changeset	484 _markBitMap1(log2_intptr(MinObjAlignment)),
ff218fdb30ba 8021823: G1: Concurrent marking crashes with -XX:ObjectAlignmentInBytes>=32 in 64bit VMs tschatzl parents: 12080 diff changeset	485 _markBitMap2(log2_intptr(MinObjAlignment)),
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	486 _parallel_marking_threads(0),
4095 bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	487 _max_parallel_marking_threads(0),
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	488 _sleep_factor(0.0),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	489 _marking_task_overhead(1.0),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	490 _cleanup_sleep_factor(0.0),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	491 _cleanup_task_overhead(1.0),
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	492 _cleanup_list("Cleanup List"),
7397 442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	493 _region_bm((BitMap::idx_t)(g1h->max_regions()), false /* in_resource_area*/),
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	494 _card_bm((heap_rs.size() + CardTableModRefBS::card_size - 1) >>
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	495 CardTableModRefBS::card_shift,
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	496 false /* in_resource_area*/),
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	497
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	498 _prevMarkBitMap(&_markBitMap1),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	499 _nextMarkBitMap(&_markBitMap2),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	500
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	501 _markStack(this),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	502 // _finger set in set_non_marking_state
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	503
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	504 _max_worker_id(MAX2((uint)ParallelGCThreads, 1U)),
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	505 // _active_tasks set in set_non_marking_state
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	506 // _tasks set inside the constructor
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	507 _task_queues(new CMTaskQueueSet((int) _max_worker_id)),
8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	508 _terminator(ParallelTaskTerminator((int) _max_worker_id, _task_queues)),
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	509
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	510 _has_overflown(false),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	511 _concurrent(false),
619 7ea5ca260b28 6814467: G1: small fixes related to concurrent marking verboseness tonyp parents: 470 diff changeset	512 _has_aborted(false),
7ea5ca260b28 6814467: G1: small fixes related to concurrent marking verboseness tonyp parents: 470 diff changeset	513 _restart_for_overflow(false),
7ea5ca260b28 6814467: G1: small fixes related to concurrent marking verboseness tonyp parents: 470 diff changeset	514 _concurrent_marking_in_progress(false),
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	515
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	516 // _verbose_level set below
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	517
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	518 _init_times(),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	519 _remark_times(), _remark_mark_times(), _remark_weak_ref_times(),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	520 _cleanup_times(),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	521 _total_counting_time(0.0),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	522 _total_rs_scrub_time(0.0),
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	523
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	524 _parallel_workers(NULL),
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	525
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	526 _count_card_bitmaps(NULL),
7397 442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	527 _count_marked_bytes(NULL),
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	528 _completed_initialization(false) {
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	529 CMVerboseLevel verbose_level = (CMVerboseLevel) G1MarkingVerboseLevel;
23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	530 if (verbose_level < no_verbose) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	531 verbose_level = no_verbose;
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	532 }
23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	533 if (verbose_level > high_verbose) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	534 verbose_level = high_verbose;
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	535 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	536 _verbose_level = verbose_level;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	537
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	538 if (verbose_low()) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	539 gclog_or_tty->print_cr("[global] init, heap start = "PTR_FORMAT", "
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	540 "heap end = "PTR_FORMAT, _heap_start, _heap_end);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	541 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	542
7397 442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	543 if (!_markBitMap1.allocate(heap_rs)) {
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	544 warning("Failed to allocate first CM bit map");
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	545 return;
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	546 }
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	547 if (!_markBitMap2.allocate(heap_rs)) {
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	548 warning("Failed to allocate second CM bit map");
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	549 return;
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	550 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	551
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	552 // Create & start a ConcurrentMark thread.
845 df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 831 diff changeset	553 _cmThread = new ConcurrentMarkThread(this);
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 831 diff changeset	554 assert(cmThread() != NULL, "CM Thread should have been created");
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 831 diff changeset	555 assert(cmThread()->cm() != NULL, "CM Thread should refer to this cm");
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 831 diff changeset	556
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	557 assert(CGC_lock != NULL, "Where's the CGC_lock?");
7397 442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	558 assert(_markBitMap1.covers(heap_rs), "_markBitMap1 inconsistency");
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	559 assert(_markBitMap2.covers(heap_rs), "_markBitMap2 inconsistency");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	560
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	561 SATBMarkQueueSet& satb_qs = JavaThread::satb_mark_queue_set();
1282 b81f3572f355 6928059: G1: command line parameter renaming tonyp parents: 1111 diff changeset	562 satb_qs.set_buffer_size(G1SATBBufferSize);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	563
4837 eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	564 _root_regions.init(_g1h, this);
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	565
1284 5f1f51edaff6 6928081: G1: rename parameters common with CMS jmasa parents: 1282 diff changeset	566 if (ConcGCThreads > ParallelGCThreads) {
7397 442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	567 warning("Can't have more ConcGCThreads (" UINT32_FORMAT ") "
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	568 "than ParallelGCThreads (" UINT32_FORMAT ").",
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	569 ConcGCThreads, ParallelGCThreads);
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	570 return;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	571 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	572 if (ParallelGCThreads == 0) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	573 // if we are not running with any parallel GC threads we will not
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	574 // spawn any marking threads either
4095 bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	575 _parallel_marking_threads = 0;
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	576 _max_parallel_marking_threads = 0;
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	577 _sleep_factor = 0.0;
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	578 _marking_task_overhead = 1.0;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	579 } else {
8006 4700e77d44c1 8006894: G1: Number of marking threads missing from PrintFlagsFinal output johnc parents: 7450 diff changeset	580 if (!FLAG_IS_DEFAULT(ConcGCThreads) && ConcGCThreads > 0) {
4700e77d44c1 8006894: G1: Number of marking threads missing from PrintFlagsFinal output johnc parents: 7450 diff changeset	581 // Note: ConcGCThreads has precedence over G1MarkingOverheadPercent
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	582 // if both are set
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	583 _sleep_factor = 0.0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	584 _marking_task_overhead = 1.0;
751 20c6f43950b5 6490395: G1: Tidy up command line flags. johnc parents: 647 diff changeset	585 } else if (G1MarkingOverheadPercent > 0) {
8006 4700e77d44c1 8006894: G1: Number of marking threads missing from PrintFlagsFinal output johnc parents: 7450 diff changeset	586 // We will calculate the number of parallel marking threads based
4700e77d44c1 8006894: G1: Number of marking threads missing from PrintFlagsFinal output johnc parents: 7450 diff changeset	587 // on a target overhead with respect to the soft real-time goal
751 20c6f43950b5 6490395: G1: Tidy up command line flags. johnc parents: 647 diff changeset	588 double marking_overhead = (double) G1MarkingOverheadPercent / 100.0;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	589 double overall_cm_overhead =
751 20c6f43950b5 6490395: G1: Tidy up command line flags. johnc parents: 647 diff changeset	590 (double) MaxGCPauseMillis * marking_overhead /
20c6f43950b5 6490395: G1: Tidy up command line flags. johnc parents: 647 diff changeset	591 (double) GCPauseIntervalMillis;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	592 double cpu_ratio = 1.0 / (double) os::processor_count();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	593 double marking_thread_num = ceil(overall_cm_overhead / cpu_ratio);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	594 double marking_task_overhead =
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	595 overall_cm_overhead / marking_thread_num *
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	596 (double) os::processor_count();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	597 double sleep_factor =
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	598 (1.0 - marking_task_overhead) / marking_task_overhead;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	599
8006 4700e77d44c1 8006894: G1: Number of marking threads missing from PrintFlagsFinal output johnc parents: 7450 diff changeset	600 FLAG_SET_ERGO(uintx, ConcGCThreads, (uint) marking_thread_num);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	601 _sleep_factor = sleep_factor;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	602 _marking_task_overhead = marking_task_overhead;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	603 } else {
8006 4700e77d44c1 8006894: G1: Number of marking threads missing from PrintFlagsFinal output johnc parents: 7450 diff changeset	604 // Calculate the number of parallel marking threads by scaling
4700e77d44c1 8006894: G1: Number of marking threads missing from PrintFlagsFinal output johnc parents: 7450 diff changeset	605 // the number of parallel GC threads.
4700e77d44c1 8006894: G1: Number of marking threads missing from PrintFlagsFinal output johnc parents: 7450 diff changeset	606 uint marking_thread_num = scale_parallel_threads((uint) ParallelGCThreads);
4700e77d44c1 8006894: G1: Number of marking threads missing from PrintFlagsFinal output johnc parents: 7450 diff changeset	607 FLAG_SET_ERGO(uintx, ConcGCThreads, marking_thread_num);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	608 _sleep_factor = 0.0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	609 _marking_task_overhead = 1.0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	610 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	611
8006 4700e77d44c1 8006894: G1: Number of marking threads missing from PrintFlagsFinal output johnc parents: 7450 diff changeset	612 assert(ConcGCThreads > 0, "Should have been set");
4700e77d44c1 8006894: G1: Number of marking threads missing from PrintFlagsFinal output johnc parents: 7450 diff changeset	613 _parallel_marking_threads = (uint) ConcGCThreads;
4700e77d44c1 8006894: G1: Number of marking threads missing from PrintFlagsFinal output johnc parents: 7450 diff changeset	614 _max_parallel_marking_threads = _parallel_marking_threads;
4700e77d44c1 8006894: G1: Number of marking threads missing from PrintFlagsFinal output johnc parents: 7450 diff changeset	615
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	616 if (parallel_marking_threads() > 1) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	617 _cleanup_task_overhead = 1.0;
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	618 } else {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	619 _cleanup_task_overhead = marking_task_overhead();
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	620 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	621 _cleanup_sleep_factor =
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	622 (1.0 - cleanup_task_overhead()) / cleanup_task_overhead();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	623
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	624 #if 0
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	625 gclog_or_tty->print_cr("Marking Threads %d", parallel_marking_threads());
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	626 gclog_or_tty->print_cr("CM Marking Task Overhead %1.4lf", marking_task_overhead());
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	627 gclog_or_tty->print_cr("CM Sleep Factor %1.4lf", sleep_factor());
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	628 gclog_or_tty->print_cr("CL Marking Task Overhead %1.4lf", cleanup_task_overhead());
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	629 gclog_or_tty->print_cr("CL Sleep Factor %1.4lf", cleanup_sleep_factor());
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	630 #endif
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	631
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	632 guarantee(parallel_marking_threads() > 0, "peace of mind");
1833 8b10f48633dc 6984287: Regularize how GC parallel workers are specified. jmasa parents: 1719 diff changeset	633 _parallel_workers = new FlexibleWorkGang("G1 Parallel Marking Threads",
4728 441e946dc1af 7121618: Change type of number of GC workers to unsigned int. jmasa parents: 4711 diff changeset	634 _max_parallel_marking_threads, false, true);
1833 8b10f48633dc 6984287: Regularize how GC parallel workers are specified. jmasa parents: 1719 diff changeset	635 if (_parallel_workers == NULL) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	636 vm_exit_during_initialization("Failed necessary allocation.");
1833 8b10f48633dc 6984287: Regularize how GC parallel workers are specified. jmasa parents: 1719 diff changeset	637 } else {
8b10f48633dc 6984287: Regularize how GC parallel workers are specified. jmasa parents: 1719 diff changeset	638 _parallel_workers->initialize_workers();
8b10f48633dc 6984287: Regularize how GC parallel workers are specified. jmasa parents: 1719 diff changeset	639 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	640 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	641
7397 442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	642 if (FLAG_IS_DEFAULT(MarkStackSize)) {
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	643 uintx mark_stack_size =
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	644 MIN2(MarkStackSizeMax,
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	645 MAX2(MarkStackSize, (uintx) (parallel_marking_threads() * TASKQUEUE_SIZE)));
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	646 // Verify that the calculated value for MarkStackSize is in range.
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	647 // It would be nice to use the private utility routine from Arguments.
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	648 if (!(mark_stack_size >= 1 && mark_stack_size <= MarkStackSizeMax)) {
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	649 warning("Invalid value calculated for MarkStackSize (" UINTX_FORMAT "): "
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	650 "must be between " UINTX_FORMAT " and " UINTX_FORMAT,
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	651 mark_stack_size, 1, MarkStackSizeMax);
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	652 return;
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	653 }
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	654 FLAG_SET_ERGO(uintx, MarkStackSize, mark_stack_size);
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	655 } else {
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	656 // Verify MarkStackSize is in range.
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	657 if (FLAG_IS_CMDLINE(MarkStackSize)) {
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	658 if (FLAG_IS_DEFAULT(MarkStackSizeMax)) {
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	659 if (!(MarkStackSize >= 1 && MarkStackSize <= MarkStackSizeMax)) {
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	660 warning("Invalid value specified for MarkStackSize (" UINTX_FORMAT "): "
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	661 "must be between " UINTX_FORMAT " and " UINTX_FORMAT,
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	662 MarkStackSize, 1, MarkStackSizeMax);
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	663 return;
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	664 }
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	665 } else if (FLAG_IS_CMDLINE(MarkStackSizeMax)) {
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	666 if (!(MarkStackSize >= 1 && MarkStackSize <= MarkStackSizeMax)) {
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	667 warning("Invalid value specified for MarkStackSize (" UINTX_FORMAT ")"
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	668 " or for MarkStackSizeMax (" UINTX_FORMAT ")",
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	669 MarkStackSize, MarkStackSizeMax);
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	670 return;
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	671 }
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	672 }
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	673 }
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	674 }
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	675
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	676 if (!_markStack.allocate(MarkStackSize)) {
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	677 warning("Failed to allocate CM marking stack");
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	678 return;
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	679 }
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	680
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	681 _tasks = NEW_C_HEAP_ARRAY(CMTask*, _max_worker_id, mtGC);
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	682 _accum_task_vtime = NEW_C_HEAP_ARRAY(double, _max_worker_id, mtGC);
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	683
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	684 _count_card_bitmaps = NEW_C_HEAP_ARRAY(BitMap, _max_worker_id, mtGC);
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	685 _count_marked_bytes = NEW_C_HEAP_ARRAY(size_t*, _max_worker_id, mtGC);
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	686
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	687 BitMap::idx_t card_bm_size = _card_bm.size();
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	688
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	689 // so that the assertion in MarkingTaskQueue::task_queue doesn't fail
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	690 _active_tasks = _max_worker_id;
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	691
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	692 size_t max_regions = (size_t) _g1h->max_regions();
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	693 for (uint i = 0; i < _max_worker_id; ++i) {
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	694 CMTaskQueue* task_queue = new CMTaskQueue();
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	695 task_queue->initialize();
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	696 _task_queues->register_queue(i, task_queue);
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	697
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	698 _count_card_bitmaps[i] = BitMap(card_bm_size, false);
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	699 _count_marked_bytes[i] = NEW_C_HEAP_ARRAY(size_t, max_regions, mtGC);
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	700
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	701 _tasks[i] = new CMTask(i, this,
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	702 _count_marked_bytes[i],
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	703 &_count_card_bitmaps[i],
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	704 task_queue, _task_queues);
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	705
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	706 _accum_task_vtime[i] = 0.0;
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	707 }
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	708
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	709 // Calculate the card number for the bottom of the heap. Used
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	710 // in biasing indexes into the accounting card bitmaps.
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	711 _heap_bottom_card_num =
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	712 intptr_t(uintptr_t(_g1h->reserved_region().start()) >>
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	713 CardTableModRefBS::card_shift);
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	714
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	715 // Clear all the liveness counting data
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	716 clear_all_count_data();
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	717
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	718 // so that the call below can read a sensible value
7397 442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	719 _heap_start = (HeapWord*) heap_rs.base();
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	720 set_non_marking_state();
7397 442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	721 _completed_initialization = true;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	722 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	723
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	724 void ConcurrentMark::update_g1_committed(bool force) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	725 // If concurrent marking is not in progress, then we do not need to
5988 2a0172480595 7127697: G1: remove dead code after recent concurrent mark changes tonyp parents: 4837 diff changeset	726 // update _heap_end.
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	727 if (!concurrent_marking_in_progress() && !force) return;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	728
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	729 MemRegion committed = _g1h->g1_committed();
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	730 assert(committed.start() == _heap_start, "start shouldn't change");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	731 HeapWord* new_end = committed.end();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	732 if (new_end > _heap_end) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	733 // The heap has been expanded.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	734
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	735 _heap_end = new_end;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	736 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	737 // Notice that the heap can also shrink. However, this only happens
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	738 // during a Full GC (at least currently) and the entire marking
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	739 // phase will bail out and the task will not be restarted. So, let's
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	740 // do nothing.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	741 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	742
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	743 void ConcurrentMark::reset() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	744 // Starting values for these two. This should be called in a STW
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	745 // phase. CM will be notified of any future g1_committed expansions
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	746 // will be at the end of evacuation pauses, when tasks are
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	747 // inactive.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	748 MemRegion committed = _g1h->g1_committed();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	749 _heap_start = committed.start();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	750 _heap_end = committed.end();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	751
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	752 // Separated the asserts so that we know which one fires.
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	753 assert(_heap_start != NULL, "heap bounds should look ok");
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	754 assert(_heap_end != NULL, "heap bounds should look ok");
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	755 assert(_heap_start < _heap_end, "heap bounds should look ok");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	756
7450 d275c3dc73e6 8004816: G1: Kitchensink failures after marking stack changes johnc parents: 7397 diff changeset	757 // Reset all the marking data structures and any necessary flags
d275c3dc73e6 8004816: G1: Kitchensink failures after marking stack changes johnc parents: 7397 diff changeset	758 reset_marking_state();
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	759
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	760 if (verbose_low()) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	761 gclog_or_tty->print_cr("[global] resetting");
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	762 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	763
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	764 // We do reset all of them, since different phases will use
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	765 // different number of active threads. So, it's easiest to have all
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	766 // of them ready.
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	767 for (uint i = 0; i < _max_worker_id; ++i) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	768 _tasks[i]->reset(_nextMarkBitMap);
1835 4805b9f4779e 6941395: G1: Use only lock-free versions of region stack push() and pop() johnc parents: 1833 diff changeset	769 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	770
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	771 // we need this to make sure that the flag is on during the evac
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	772 // pause with initial mark piggy-backed
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	773 set_concurrent_marking_in_progress();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	774 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	775
7450 d275c3dc73e6 8004816: G1: Kitchensink failures after marking stack changes johnc parents: 7397 diff changeset	776
d275c3dc73e6 8004816: G1: Kitchensink failures after marking stack changes johnc parents: 7397 diff changeset	777 void ConcurrentMark::reset_marking_state(bool clear_overflow) {
d275c3dc73e6 8004816: G1: Kitchensink failures after marking stack changes johnc parents: 7397 diff changeset	778 _markStack.set_should_expand();
d275c3dc73e6 8004816: G1: Kitchensink failures after marking stack changes johnc parents: 7397 diff changeset	779 _markStack.setEmpty(); // Also clears the _markStack overflow flag
d275c3dc73e6 8004816: G1: Kitchensink failures after marking stack changes johnc parents: 7397 diff changeset	780 if (clear_overflow) {
d275c3dc73e6 8004816: G1: Kitchensink failures after marking stack changes johnc parents: 7397 diff changeset	781 clear_has_overflown();
d275c3dc73e6 8004816: G1: Kitchensink failures after marking stack changes johnc parents: 7397 diff changeset	782 } else {
d275c3dc73e6 8004816: G1: Kitchensink failures after marking stack changes johnc parents: 7397 diff changeset	783 assert(has_overflown(), "pre-condition");
d275c3dc73e6 8004816: G1: Kitchensink failures after marking stack changes johnc parents: 7397 diff changeset	784 }
d275c3dc73e6 8004816: G1: Kitchensink failures after marking stack changes johnc parents: 7397 diff changeset	785 _finger = _heap_start;
d275c3dc73e6 8004816: G1: Kitchensink failures after marking stack changes johnc parents: 7397 diff changeset	786
d275c3dc73e6 8004816: G1: Kitchensink failures after marking stack changes johnc parents: 7397 diff changeset	787 for (uint i = 0; i < _max_worker_id; ++i) {
d275c3dc73e6 8004816: G1: Kitchensink failures after marking stack changes johnc parents: 7397 diff changeset	788 CMTaskQueue* queue = _task_queues->queue(i);
d275c3dc73e6 8004816: G1: Kitchensink failures after marking stack changes johnc parents: 7397 diff changeset	789 queue->set_empty();
d275c3dc73e6 8004816: G1: Kitchensink failures after marking stack changes johnc parents: 7397 diff changeset	790 }
d275c3dc73e6 8004816: G1: Kitchensink failures after marking stack changes johnc parents: 7397 diff changeset	791 }
d275c3dc73e6 8004816: G1: Kitchensink failures after marking stack changes johnc parents: 7397 diff changeset	792
8788 e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	793 void ConcurrentMark::set_concurrency(uint active_tasks) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	794 assert(active_tasks <= _max_worker_id, "we should not have more");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	795
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	796 _active_tasks = active_tasks;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	797 // Need to update the three data structures below according to the
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	798 // number of active threads for this phase.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	799 _terminator = ParallelTaskTerminator((int) active_tasks, _task_queues);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	800 _first_overflow_barrier_sync.set_n_workers((int) active_tasks);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	801 _second_overflow_barrier_sync.set_n_workers((int) active_tasks);
8788 e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	802 }
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	803
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	804 void ConcurrentMark::set_concurrency_and_phase(uint active_tasks, bool concurrent) {
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	805 set_concurrency(active_tasks);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	806
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	807 _concurrent = concurrent;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	808 // We propagate this to all tasks, not just the active ones.
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	809 for (uint i = 0; i < _max_worker_id; ++i)
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	810 _tasks[i]->set_concurrent(concurrent);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	811
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	812 if (concurrent) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	813 set_concurrent_marking_in_progress();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	814 } else {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	815 // We currently assume that the concurrent flag has been set to
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	816 // false before we start remark. At this point we should also be
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	817 // in a STW phase.
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	818 assert(!concurrent_marking_in_progress(), "invariant");
8788 e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	819 assert(_finger == _heap_end,
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	820 err_msg("only way to get here: _finger: "PTR_FORMAT", _heap_end: "PTR_FORMAT,
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	821 _finger, _heap_end));
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	822 update_g1_committed(true);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	823 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	824 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	825
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	826 void ConcurrentMark::set_non_marking_state() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	827 // We set the global marking state to some default values when we're
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	828 // not doing marking.
7450 d275c3dc73e6 8004816: G1: Kitchensink failures after marking stack changes johnc parents: 7397 diff changeset	829 reset_marking_state();
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	830 _active_tasks = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	831 clear_concurrent_marking_in_progress();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	832 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	833
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	834 ConcurrentMark::~ConcurrentMark() {
4735 776173fc2df9 7125516: G1: ~ConcurrentMark() frees incorrectly stefank parents: 4728 diff changeset	835 // The ConcurrentMark instance is never freed.
776173fc2df9 7125516: G1: ~ConcurrentMark() frees incorrectly stefank parents: 4728 diff changeset	836 ShouldNotReachHere();
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	837 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	838
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	839 void ConcurrentMark::clearNextBitmap() {
1359 23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1358 diff changeset	840 G1CollectedHeap* g1h = G1CollectedHeap::heap();
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1358 diff changeset	841 G1CollectorPolicy* g1p = g1h->g1_policy();
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1358 diff changeset	842
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1358 diff changeset	843 // Make sure that the concurrent mark thread looks to still be in
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1358 diff changeset	844 // the current cycle.
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1358 diff changeset	845 guarantee(cmThread()->during_cycle(), "invariant");
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1358 diff changeset	846
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1358 diff changeset	847 // We are finishing up the current cycle by clearing the next
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1358 diff changeset	848 // marking bitmap and getting it ready for the next cycle. During
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1358 diff changeset	849 // this time no other cycle can start. So, let's make sure that this
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1358 diff changeset	850 // is the case.
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1358 diff changeset	851 guarantee(!g1h->mark_in_progress(), "invariant");
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1358 diff changeset	852
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1358 diff changeset	853 // clear the mark bitmap (no grey objects to start with).
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1358 diff changeset	854 // We need to do this in chunks and offer to yield in between
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1358 diff changeset	855 // each chunk.
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1358 diff changeset	856 HeapWord* start = _nextMarkBitMap->startWord();
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1358 diff changeset	857 HeapWord* end = _nextMarkBitMap->endWord();
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1358 diff changeset	858 HeapWord* cur = start;
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1358 diff changeset	859 size_t chunkSize = M;
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1358 diff changeset	860 while (cur < end) {
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1358 diff changeset	861 HeapWord* next = cur + chunkSize;
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	862 if (next > end) {
1359 23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1358 diff changeset	863 next = end;
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	864 }
1359 23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1358 diff changeset	865 MemRegion mr(cur,next);
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1358 diff changeset	866 _nextMarkBitMap->clearRange(mr);
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1358 diff changeset	867 cur = next;
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1358 diff changeset	868 do_yield_check();
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1358 diff changeset	869
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1358 diff changeset	870 // Repeat the asserts from above. We'll do them as asserts here to
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1358 diff changeset	871 // minimize their overhead on the product. However, we'll have
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1358 diff changeset	872 // them as guarantees at the beginning / end of the bitmap
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1358 diff changeset	873 // clearing to get some checking in the product.
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1358 diff changeset	874 assert(cmThread()->during_cycle(), "invariant");
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1358 diff changeset	875 assert(!g1h->mark_in_progress(), "invariant");
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1358 diff changeset	876 }
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1358 diff changeset	877
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	878 // Clear the liveness counting data
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	879 clear_all_count_data();
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	880
1359 23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1358 diff changeset	881 // Repeat the asserts from above.
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1358 diff changeset	882 guarantee(cmThread()->during_cycle(), "invariant");
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1358 diff changeset	883 guarantee(!g1h->mark_in_progress(), "invariant");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	884 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	885
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	886 class NoteStartOfMarkHRClosure: public HeapRegionClosure {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	887 public:
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	888 bool doHeapRegion(HeapRegion* r) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	889 if (!r->continuesHumongous()) {
4787 2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	890 r->note_start_of_marking();
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	891 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	892 return false;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	893 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	894 };
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	895
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	896 void ConcurrentMark::checkpointRootsInitialPre() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	897 G1CollectedHeap* g1h = G1CollectedHeap::heap();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	898 G1CollectorPolicy* g1p = g1h->g1_policy();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	899
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	900 _has_aborted = false;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	901
1547 fb1a39993f69 6951319: enable solaris builds using Sun Studio 12 update 1 jcoomes parents: 1388 diff changeset	902 #ifndef PRODUCT
1044 6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	903 if (G1PrintReachableAtInitialMark) {
1388 7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	904 print_reachable("at-cycle-start",
3772 6747fd0512e0 7004681: G1: Extend marking verification to Full GCs johnc parents: 3771 diff changeset	905 VerifyOption_G1UsePrevMarking, true /* all */);
1044 6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	906 }
1547 fb1a39993f69 6951319: enable solaris builds using Sun Studio 12 update 1 jcoomes parents: 1388 diff changeset	907 #endif
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	908
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	909 // Initialise marking structures. This has to be done in a STW phase.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	910 reset();
4787 2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	911
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	912 // For each region note start of marking.
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	913 NoteStartOfMarkHRClosure startcl;
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	914 g1h->heap_region_iterate(&startcl);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	915 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	916
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	917
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	918 void ConcurrentMark::checkpointRootsInitialPost() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	919 G1CollectedHeap* g1h = G1CollectedHeap::heap();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	920
3316 cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	921 // If we force an overflow during remark, the remark operation will
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	922 // actually abort and we'll restart concurrent marking. If we always
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	923 // force an oveflow during remark we'll never actually complete the
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	924 // marking phase. So, we initilize this here, at the start of the
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	925 // cycle, so that at the remaining overflow number will decrease at
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	926 // every remark and we'll eventually not need to cause one.
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	927 force_overflow_stw()->init();
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	928
3979 4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3977 diff changeset	929 // Start Concurrent Marking weak-reference discovery.
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3977 diff changeset	930 ReferenceProcessor* rp = g1h->ref_processor_cm();
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3977 diff changeset	931 // enable ("weak") refs discovery
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3977 diff changeset	932 rp->enable_discovery(true /verify_disabled/, true /verify_no_refs/);
457 27a80744a83b 6778647: snap(), snap_policy() should be renamed setup(), setup_policy() ysr parents: 453 diff changeset	933 rp->setup_policy(false); // snapshot the soft ref policy to be used in this cycle
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	934
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	935 SATBMarkQueueSet& satb_mq_set = JavaThread::satb_mark_queue_set();
1317 d4197f8d516a 6935821: G1: threads created during marking do not active their SATB queues tonyp parents: 1314 diff changeset	936 // This is the start of the marking cycle, we're expected all
d4197f8d516a 6935821: G1: threads created during marking do not active their SATB queues tonyp parents: 1314 diff changeset	937 // threads to have SATB queues with active set to false.
d4197f8d516a 6935821: G1: threads created during marking do not active their SATB queues tonyp parents: 1314 diff changeset	938 satb_mq_set.set_active_all_threads(true, /* new active value */
d4197f8d516a 6935821: G1: threads created during marking do not active their SATB queues tonyp parents: 1314 diff changeset	939 false /* expected_active */);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	940
4837 eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	941 _root_regions.prepare_for_scan();
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	942
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	943 // update_g1_committed() will be called at the end of an evac pause
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	944 // when marking is on. So, it's also called at the end of the
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	945 // initial-mark pause to update the heap end, if the heap expands
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	946 // during it. No need to call it here.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	947 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	948
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	949 /*
3316 cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	950 * Notice that in the next two methods, we actually leave the STS
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	951 * during the barrier sync and join it immediately afterwards. If we
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	952 * do not do this, the following deadlock can occur: one thread could
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	953 * be in the barrier sync code, waiting for the other thread to also
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	954 * sync up, whereas another one could be trying to yield, while also
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	955 * waiting for the other threads to sync up too.
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	956 *
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	957 * Note, however, that this code is also used during remark and in
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	958 * this case we should not attempt to leave / enter the STS, otherwise
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	959 * we'll either hit an asseert (debug / fastdebug) or deadlock
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	960 * (product). So we should only leave / enter the STS if we are
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	961 * operating concurrently.
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	962 *
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	963 * Because the thread that does the sync barrier has left the STS, it
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	964 * is possible to be suspended for a Full GC or an evacuation pause
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	965 * could occur. This is actually safe, since the entering the sync
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	966 * barrier is one of the last things do_marking_step() does, and it
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	967 * doesn't manipulate any data structures afterwards.
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	968 */
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	969
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	970 void ConcurrentMark::enter_first_sync_barrier(uint worker_id) {
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	971 if (verbose_low()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	972 gclog_or_tty->print_cr("[%u] entering first barrier", worker_id);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	973 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	974
3316 cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	975 if (concurrent()) {
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	976 ConcurrentGCThread::stsLeave();
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	977 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	978 _first_overflow_barrier_sync.enter();
3316 cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	979 if (concurrent()) {
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	980 ConcurrentGCThread::stsJoin();
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	981 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	982 // at this point everyone should have synced up and not be doing any
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	983 // more work
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	984
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	985 if (verbose_low()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	986 gclog_or_tty->print_cr("[%u] leaving first barrier", worker_id);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	987 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	988
8788 e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	989 // If we're executing the concurrent phase of marking, reset the marking
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	990 // state; otherwise the marking state is reset after reference processing,
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	991 // during the remark pause.
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	992 // If we reset here as a result of an overflow during the remark we will
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	993 // see assertion failures from any subsequent set_concurrency_and_phase()
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	994 // calls.
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	995 if (concurrent()) {
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	996 // let the task associated with with worker 0 do this
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	997 if (worker_id == 0) {
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	998 // task 0 is responsible for clearing the global data structures
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	999 // We should be here because of an overflow. During STW we should
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	1000 // not clear the overflow flag since we rely on it being true when
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	1001 // we exit this method to abort the pause and restart concurent
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	1002 // marking.
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	1003 reset_marking_state(true /* clear_overflow */);
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	1004 force_overflow()->update();
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	1005
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	1006 if (G1Log::fine()) {
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	1007 gclog_or_tty->date_stamp(PrintGCDateStamps);
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	1008 gclog_or_tty->stamp(PrintGCTimeStamps);
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	1009 gclog_or_tty->print_cr("[GC concurrent-mark-reset-for-overflow]");
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	1010 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1011 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1012 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1013
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1014 // after this, each task should reset its own data structures then
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1015 // then go into the second barrier
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1016 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1017
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	1018 void ConcurrentMark::enter_second_sync_barrier(uint worker_id) {
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	1019 if (verbose_low()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	1020 gclog_or_tty->print_cr("[%u] entering second barrier", worker_id);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	1021 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1022
3316 cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	1023 if (concurrent()) {
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	1024 ConcurrentGCThread::stsLeave();
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	1025 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1026 _second_overflow_barrier_sync.enter();
3316 cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	1027 if (concurrent()) {
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	1028 ConcurrentGCThread::stsJoin();
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	1029 }
8788 e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	1030 // at this point everything should be re-initialized and ready to go
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1031
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	1032 if (verbose_low()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	1033 gclog_or_tty->print_cr("[%u] leaving second barrier", worker_id);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	1034 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1035 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1036
3316 cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	1037 #ifndef PRODUCT
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	1038 void ForceOverflowSettings::init() {
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	1039 _num_remaining = G1ConcMarkForceOverflow;
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	1040 _force = false;
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	1041 update();
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	1042 }
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	1043
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	1044 void ForceOverflowSettings::update() {
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	1045 if (_num_remaining > 0) {
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	1046 _num_remaining -= 1;
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	1047 _force = true;
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	1048 } else {
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	1049 _force = false;
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	1050 }
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	1051 }
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	1052
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	1053 bool ForceOverflowSettings::should_force() {
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	1054 if (_force) {
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	1055 _force = false;
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	1056 return true;
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	1057 } else {
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	1058 return false;
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	1059 }
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	1060 }
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	1061 #endif // !PRODUCT
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	1062
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1063 class CMConcurrentMarkingTask: public AbstractGangTask {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1064 private:
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1065 ConcurrentMark* _cm;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1066 ConcurrentMarkThread* _cmt;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1067
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1068 public:
4728 441e946dc1af 7121618: Change type of number of GC workers to unsigned int. jmasa parents: 4711 diff changeset	1069 void work(uint worker_id) {
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	1070 assert(Thread::current()->is_ConcurrentGC_thread(),
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	1071 "this should only be done by a conc GC thread");
1974 fd1d227ef1b9 6983204: G1: Nightly test nsk/regression/b4958615 failing with +ExplicitGCInvokesConcurrent johnc parents: 1972 diff changeset	1072 ResourceMark rm;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1073
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1074 double start_vtime = os::elapsedVTime();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1075
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1076 ConcurrentGCThread::stsJoin();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1077
4728 441e946dc1af 7121618: Change type of number of GC workers to unsigned int. jmasa parents: 4711 diff changeset	1078 assert(worker_id < _cm->active_tasks(), "invariant");
441e946dc1af 7121618: Change type of number of GC workers to unsigned int. jmasa parents: 4711 diff changeset	1079 CMTask* the_task = _cm->task(worker_id);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1080 the_task->record_start_time();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1081 if (!_cm->has_aborted()) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1082 do {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1083 double start_vtime_sec = os::elapsedVTime();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1084 double start_time_sec = os::elapsedTime();
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	1085 double mark_step_duration_ms = G1ConcMarkStepDurationMillis;
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	1086
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	1087 the_task->do_marking_step(mark_step_duration_ms,
8787 fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	1088 true /* do_termination */,
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	1089 false /* is_serial*/);
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	1090
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1091 double end_time_sec = os::elapsedTime();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1092 double end_vtime_sec = os::elapsedVTime();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1093 double elapsed_vtime_sec = end_vtime_sec - start_vtime_sec;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1094 double elapsed_time_sec = end_time_sec - start_time_sec;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1095 _cm->clear_has_overflown();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1096
4728 441e946dc1af 7121618: Change type of number of GC workers to unsigned int. jmasa parents: 4711 diff changeset	1097 bool ret = _cm->do_yield_check(worker_id);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1098
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1099 jlong sleep_time_ms;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1100 if (!_cm->has_aborted() && the_task->has_aborted()) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1101 sleep_time_ms =
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1102 (jlong) (elapsed_vtime_sec * _cm->sleep_factor() * 1000.0);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1103 ConcurrentGCThread::stsLeave();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1104 os::sleep(Thread::current(), sleep_time_ms, false);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1105 ConcurrentGCThread::stsJoin();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1106 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1107 double end_time2_sec = os::elapsedTime();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1108 double elapsed_time2_sec = end_time2_sec - start_time_sec;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1109
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1110 #if 0
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1111 gclog_or_tty->print_cr("CM: elapsed %1.4lf ms, sleep %1.4lf ms, "
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1112 "overhead %1.4lf",
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1113 elapsed_vtime_sec * 1000.0, (double) sleep_time_ms,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1114 the_task->conc_overhead(os::elapsedTime()) * 8.0);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1115 gclog_or_tty->print_cr("elapsed time %1.4lf ms, time 2: %1.4lf ms",
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1116 elapsed_time_sec * 1000.0, elapsed_time2_sec * 1000.0);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1117 #endif
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1118 } while (!_cm->has_aborted() && the_task->has_aborted());
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1119 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1120 the_task->record_end_time();
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	1121 guarantee(!the_task->has_aborted() \|\| _cm->has_aborted(), "invariant");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1122
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1123 ConcurrentGCThread::stsLeave();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1124
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1125 double end_vtime = os::elapsedVTime();
4728 441e946dc1af 7121618: Change type of number of GC workers to unsigned int. jmasa parents: 4711 diff changeset	1126 _cm->update_accum_task_vtime(worker_id, end_vtime - start_vtime);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1127 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1128
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1129 CMConcurrentMarkingTask(ConcurrentMark* cm,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1130 ConcurrentMarkThread* cmt) :
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1131 AbstractGangTask("Concurrent Mark"), _cm(cm), _cmt(cmt) { }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1132
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1133 ~CMConcurrentMarkingTask() { }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1134 };
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1135
4095 bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	1136 // Calculates the number of active workers for a concurrent
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	1137 // phase.
4728 441e946dc1af 7121618: Change type of number of GC workers to unsigned int. jmasa parents: 4711 diff changeset	1138 uint ConcurrentMark::calc_parallel_marking_threads() {
4711 adedfbbf0360 7120038: G1: ParallelGCThreads==0 is broken johnc parents: 4097 diff changeset	1139 if (G1CollectedHeap::use_parallel_gc_threads()) {
4728 441e946dc1af 7121618: Change type of number of GC workers to unsigned int. jmasa parents: 4711 diff changeset	1140 uint n_conc_workers = 0;
4095 bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	1141 if (!UseDynamicNumberOfGCThreads \|\|
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	1142 (!FLAG_IS_DEFAULT(ConcGCThreads) &&
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	1143 !ForceDynamicNumberOfGCThreads)) {
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	1144 n_conc_workers = max_parallel_marking_threads();
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	1145 } else {
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	1146 n_conc_workers =
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	1147 AdaptiveSizePolicy::calc_default_active_workers(
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	1148 max_parallel_marking_threads(),
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	1149 1, /* Minimum workers */
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	1150 parallel_marking_threads(),
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	1151 Threads::number_of_non_daemon_threads());
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	1152 // Don't scale down "n_conc_workers" by scale_parallel_threads() because
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	1153 // that scaling has already gone into "_max_parallel_marking_threads".
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	1154 }
4711 adedfbbf0360 7120038: G1: ParallelGCThreads==0 is broken johnc parents: 4097 diff changeset	1155 assert(n_conc_workers > 0, "Always need at least 1");
adedfbbf0360 7120038: G1: ParallelGCThreads==0 is broken johnc parents: 4097 diff changeset	1156 return n_conc_workers;
4095 bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	1157 }
4711 adedfbbf0360 7120038: G1: ParallelGCThreads==0 is broken johnc parents: 4097 diff changeset	1158 // If we are not running with any parallel GC threads we will not
adedfbbf0360 7120038: G1: ParallelGCThreads==0 is broken johnc parents: 4097 diff changeset	1159 // have spawned any marking threads either. Hence the number of
adedfbbf0360 7120038: G1: ParallelGCThreads==0 is broken johnc parents: 4097 diff changeset	1160 // concurrent workers should be 0.
adedfbbf0360 7120038: G1: ParallelGCThreads==0 is broken johnc parents: 4097 diff changeset	1161 return 0;
4095 bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	1162 }
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	1163
4837 eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1164 void ConcurrentMark::scanRootRegion(HeapRegion* hr, uint worker_id) {
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1165 // Currently, only survivors can be root regions.
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1166 assert(hr->next_top_at_mark_start() == hr->bottom(), "invariant");
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1167 G1RootRegionScanClosure cl(_g1h, this, worker_id);
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1168
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1169 const uintx interval = PrefetchScanIntervalInBytes;
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1170 HeapWord* curr = hr->bottom();
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1171 const HeapWord* end = hr->top();
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1172 while (curr < end) {
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1173 Prefetch::read(curr, interval);
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1174 oop obj = oop(curr);
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1175 int size = obj->oop_iterate(&cl);
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1176 assert(size == obj->size(), "sanity");
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1177 curr += size;
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1178 }
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1179 }
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1180
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1181 class CMRootRegionScanTask : public AbstractGangTask {
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1182 private:
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1183 ConcurrentMark* _cm;
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1184
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1185 public:
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1186 CMRootRegionScanTask(ConcurrentMark* cm) :
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1187 AbstractGangTask("Root Region Scan"), _cm(cm) { }
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1188
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1189 void work(uint worker_id) {
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1190 assert(Thread::current()->is_ConcurrentGC_thread(),
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1191 "this should only be done by a conc GC thread");
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1192
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1193 CMRootRegions* root_regions = _cm->root_regions();
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1194 HeapRegion* hr = root_regions->claim_next();
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1195 while (hr != NULL) {
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1196 _cm->scanRootRegion(hr, worker_id);
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1197 hr = root_regions->claim_next();
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1198 }
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1199 }
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1200 };
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1201
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1202 void ConcurrentMark::scanRootRegions() {
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1203 // scan_in_progress() will have been set to true only if there was
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1204 // at least one root region to scan. So, if it's false, we
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1205 // should not attempt to do any further work.
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1206 if (root_regions()->scan_in_progress()) {
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1207 _parallel_marking_threads = calc_parallel_marking_threads();
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1208 assert(parallel_marking_threads() <= max_parallel_marking_threads(),
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1209 "Maximum number of marking threads exceeded");
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1210 uint active_workers = MAX2(1U, parallel_marking_threads());
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1211
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1212 CMRootRegionScanTask task(this);
8008 256d3f43c177 8005875: G1: Kitchensink fails with ParallelGCThreads=0 johnc parents: 8006 diff changeset	1213 if (use_parallel_marking_threads()) {
4837 eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1214 _parallel_workers->set_active_workers((int) active_workers);
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1215 _parallel_workers->run_task(&task);
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1216 } else {
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1217 task.work(0);
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1218 }
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1219
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1220 // It's possible that has_aborted() is true here without actually
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1221 // aborting the survivor scan earlier. This is OK as it's
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1222 // mainly used for sanity checking.
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1223 root_regions()->scan_finished();
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1224 }
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1225 }
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1226
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1227 void ConcurrentMark::markFromRoots() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1228 // we might be tempted to assert that:
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1229 // assert(asynch == !SafepointSynchronize::is_at_safepoint(),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1230 // "inconsistent argument?");
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1231 // However that wouldn't be right, because it's possible that
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1232 // a safepoint is indeed in progress as a younger generation
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1233 // stop-the-world GC happens even as we mark in this generation.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1234
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1235 _restart_for_overflow = false;
3316 cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	1236 force_overflow_conc()->init();
4095 bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	1237
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	1238 // _g1h has _n_par_threads
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	1239 _parallel_marking_threads = calc_parallel_marking_threads();
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	1240 assert(parallel_marking_threads() <= max_parallel_marking_threads(),
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	1241 "Maximum number of marking threads exceeded");
4711 adedfbbf0360 7120038: G1: ParallelGCThreads==0 is broken johnc parents: 4097 diff changeset	1242
4728 441e946dc1af 7121618: Change type of number of GC workers to unsigned int. jmasa parents: 4711 diff changeset	1243 uint active_workers = MAX2(1U, parallel_marking_threads());
4711 adedfbbf0360 7120038: G1: ParallelGCThreads==0 is broken johnc parents: 4097 diff changeset	1244
8788 e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	1245 // Parallel task terminator is set in "set_concurrency_and_phase()"
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	1246 set_concurrency_and_phase(active_workers, true /* concurrent */);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1247
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1248 CMConcurrentMarkingTask markingTask(this, cmThread());
8008 256d3f43c177 8005875: G1: Kitchensink fails with ParallelGCThreads=0 johnc parents: 8006 diff changeset	1249 if (use_parallel_marking_threads()) {
4711 adedfbbf0360 7120038: G1: ParallelGCThreads==0 is broken johnc parents: 4097 diff changeset	1250 _parallel_workers->set_active_workers((int)active_workers);
adedfbbf0360 7120038: G1: ParallelGCThreads==0 is broken johnc parents: 4097 diff changeset	1251 // Don't set _n_par_threads because it affects MT in proceess_strong_roots()
adedfbbf0360 7120038: G1: ParallelGCThreads==0 is broken johnc parents: 4097 diff changeset	1252 // and the decisions on that MT processing is made elsewhere.
adedfbbf0360 7120038: G1: ParallelGCThreads==0 is broken johnc parents: 4097 diff changeset	1253 assert(_parallel_workers->active_workers() > 0, "Should have been set");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1254 _parallel_workers->run_task(&markingTask);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	1255 } else {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1256 markingTask.work(0);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	1257 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1258 print_stats();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1259 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1260
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1261 void ConcurrentMark::checkpointRootsFinal(bool clear_all_soft_refs) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1262 // world is stopped at this checkpoint
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1263 assert(SafepointSynchronize::is_at_safepoint(),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1264 "world should be stopped");
3979 4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3977 diff changeset	1265
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1266 G1CollectedHeap* g1h = G1CollectedHeap::heap();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1267
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1268 // If a full collection has happened, we shouldn't do this.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1269 if (has_aborted()) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1270 g1h->set_marking_complete(); // So bitmap clearing isn't confused
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1271 return;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1272 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1273
2125 7246a374a9f2 6458402: 3 jvmti tests fail with CMS and +ExplicitGCInvokesConcurrent kamg parents: 2037 diff changeset	1274 SvcGCMarker sgcm(SvcGCMarker::OTHER);
7246a374a9f2 6458402: 3 jvmti tests fail with CMS and +ExplicitGCInvokesConcurrent kamg parents: 2037 diff changeset	1275
845 df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 831 diff changeset	1276 if (VerifyDuringGC) {
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 831 diff changeset	1277 HandleMark hm; // handle scope
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 831 diff changeset	1278 Universe::heap()->prepare_for_verify();
10186 b06ac540229e 8013132: Add a flag to turn off the output of the verbose verification code stefank parents: 9076 diff changeset	1279 Universe::verify(VerifyOption_G1UsePrevMarking,
b06ac540229e 8013132: Add a flag to turn off the output of the verbose verification code stefank parents: 9076 diff changeset	1280 " VerifyDuringGC:(before)");
845 df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 831 diff changeset	1281 }
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 831 diff changeset	1282
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1283 G1CollectorPolicy* g1p = g1h->g1_policy();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1284 g1p->record_concurrent_mark_remark_start();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1285
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1286 double start = os::elapsedTime();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1287
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1288 checkpointRootsFinalWork();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1289
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1290 double mark_work_end = os::elapsedTime();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1291
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1292 weakRefsWork(clear_all_soft_refs);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1293
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1294 if (has_overflown()) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1295 // Oops. We overflowed. Restart concurrent marking.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1296 _restart_for_overflow = true;
8789 1179172e9ec9 8008301: G1: guarantee(satb_mq_set.completed_buffers_num() == 0) failure johnc parents: 8788 diff changeset	1297 if (G1TraceMarkStackOverflow) {
1179172e9ec9 8008301: G1: guarantee(satb_mq_set.completed_buffers_num() == 0) failure johnc parents: 8788 diff changeset	1298 gclog_or_tty->print_cr("\nRemark led to restart for overflow.");
1179172e9ec9 8008301: G1: guarantee(satb_mq_set.completed_buffers_num() == 0) failure johnc parents: 8788 diff changeset	1299 }
1179172e9ec9 8008301: G1: guarantee(satb_mq_set.completed_buffers_num() == 0) failure johnc parents: 8788 diff changeset	1300
1179172e9ec9 8008301: G1: guarantee(satb_mq_set.completed_buffers_num() == 0) failure johnc parents: 8788 diff changeset	1301 // Verify the heap w.r.t. the previous marking bitmap.
1179172e9ec9 8008301: G1: guarantee(satb_mq_set.completed_buffers_num() == 0) failure johnc parents: 8788 diff changeset	1302 if (VerifyDuringGC) {
1179172e9ec9 8008301: G1: guarantee(satb_mq_set.completed_buffers_num() == 0) failure johnc parents: 8788 diff changeset	1303 HandleMark hm; // handle scope
1179172e9ec9 8008301: G1: guarantee(satb_mq_set.completed_buffers_num() == 0) failure johnc parents: 8788 diff changeset	1304 Universe::heap()->prepare_for_verify();
10186 b06ac540229e 8013132: Add a flag to turn off the output of the verbose verification code stefank parents: 9076 diff changeset	1305 Universe::verify(VerifyOption_G1UsePrevMarking,
b06ac540229e 8013132: Add a flag to turn off the output of the verbose verification code stefank parents: 9076 diff changeset	1306 " VerifyDuringGC:(overflow)");
8789 1179172e9ec9 8008301: G1: guarantee(satb_mq_set.completed_buffers_num() == 0) failure johnc parents: 8788 diff changeset	1307 }
1179172e9ec9 8008301: G1: guarantee(satb_mq_set.completed_buffers_num() == 0) failure johnc parents: 8788 diff changeset	1308
7450 d275c3dc73e6 8004816: G1: Kitchensink failures after marking stack changes johnc parents: 7397 diff changeset	1309 // Clear the marking state because we will be restarting
d275c3dc73e6 8004816: G1: Kitchensink failures after marking stack changes johnc parents: 7397 diff changeset	1310 // marking due to overflowing the global mark stack.
d275c3dc73e6 8004816: G1: Kitchensink failures after marking stack changes johnc parents: 7397 diff changeset	1311 reset_marking_state();
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1312 } else {
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1313 // Aggregate the per-task counting data that we have accumulated
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1314 // while marking.
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1315 aggregate_count_data();
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1316
2149 7e37af9d69ef 7011379: G1: overly long concurrent marking cycles tonyp parents: 2125 diff changeset	1317 SATBMarkQueueSet& satb_mq_set = JavaThread::satb_mark_queue_set();
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1318 // We're done with marking.
1317 d4197f8d516a 6935821: G1: threads created during marking do not active their SATB queues tonyp parents: 1314 diff changeset	1319 // This is the end of the marking cycle, we're expected all
d4197f8d516a 6935821: G1: threads created during marking do not active their SATB queues tonyp parents: 1314 diff changeset	1320 // threads to have SATB queues with active set to true.
2149 7e37af9d69ef 7011379: G1: overly long concurrent marking cycles tonyp parents: 2125 diff changeset	1321 satb_mq_set.set_active_all_threads(false, /* new active value */
7e37af9d69ef 7011379: G1: overly long concurrent marking cycles tonyp parents: 2125 diff changeset	1322 true /* expected_active */);
811 830ca2573896 6850846: G1: extend G1 marking verification tonyp parents: 751 diff changeset	1323
830ca2573896 6850846: G1: extend G1 marking verification tonyp parents: 751 diff changeset	1324 if (VerifyDuringGC) {
845 df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 831 diff changeset	1325 HandleMark hm; // handle scope
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 831 diff changeset	1326 Universe::heap()->prepare_for_verify();
10186 b06ac540229e 8013132: Add a flag to turn off the output of the verbose verification code stefank parents: 9076 diff changeset	1327 Universe::verify(VerifyOption_G1UseNextMarking,
b06ac540229e 8013132: Add a flag to turn off the output of the verbose verification code stefank parents: 9076 diff changeset	1328 " VerifyDuringGC:(after)");
811 830ca2573896 6850846: G1: extend G1 marking verification tonyp parents: 751 diff changeset	1329 }
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	1330 assert(!restart_for_overflow(), "sanity");
7450 d275c3dc73e6 8004816: G1: Kitchensink failures after marking stack changes johnc parents: 7397 diff changeset	1331 // Completely reset the marking state since marking completed
d275c3dc73e6 8004816: G1: Kitchensink failures after marking stack changes johnc parents: 7397 diff changeset	1332 set_non_marking_state();
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	1333 }
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	1334
7397 442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	1335 // Expand the marking stack, if we have to and if we can.
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	1336 if (_markStack.should_expand()) {
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	1337 _markStack.expand();
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	1338 }
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	1339
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1340 // Statistics
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1341 double now = os::elapsedTime();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1342 _remark_mark_times.add((mark_work_end - start) * 1000.0);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1343 _remark_weak_ref_times.add((now - mark_work_end) * 1000.0);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1344 _remark_times.add((now - start) * 1000.0);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1345
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1346 g1p->record_concurrent_mark_remark_end();
10405 f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10290 diff changeset	1347
f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10290 diff changeset	1348 G1CMIsAliveClosure is_alive(g1h);
f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10290 diff changeset	1349 g1h->gc_tracer_cm()->report_object_count_after_gc(&is_alive);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1350 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1351
6027 8a2e5a6a19a4 7143490: G1: Remove HeapRegion::_top_at_conc_mark_count johnc parents: 6011 diff changeset	1352 // Base class of the closures that finalize and verify the
8a2e5a6a19a4 7143490: G1: Remove HeapRegion::_top_at_conc_mark_count johnc parents: 6011 diff changeset	1353 // liveness counting data.
8a2e5a6a19a4 7143490: G1: Remove HeapRegion::_top_at_conc_mark_count johnc parents: 6011 diff changeset	1354 class CMCountDataClosureBase: public HeapRegionClosure {
8a2e5a6a19a4 7143490: G1: Remove HeapRegion::_top_at_conc_mark_count johnc parents: 6011 diff changeset	1355 protected:
6812 988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1356 G1CollectedHeap* _g1h;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1357 ConcurrentMark* _cm;
6812 988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1358 CardTableModRefBS* _ct_bs;
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1359
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1360 BitMap* _region_bm;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1361 BitMap* _card_bm;
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1362
6812 988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1363 // Takes a region that's not empty (i.e., it has at least one
829 30b9b25b9cc1 6850869: G1: RSet "scrubbing" scrubs too much tonyp parents: 811 diff changeset	1364 // live object in it and sets its corresponding bit on the region
30b9b25b9cc1 6850869: G1: RSet "scrubbing" scrubs too much tonyp parents: 811 diff changeset	1365 // bitmap to 1. If the region is "starts humongous" it will also set
30b9b25b9cc1 6850869: G1: RSet "scrubbing" scrubs too much tonyp parents: 811 diff changeset	1366 // to 1 the bits on the region bitmap that correspond to its
30b9b25b9cc1 6850869: G1: RSet "scrubbing" scrubs too much tonyp parents: 811 diff changeset	1367 // associated "continues humongous" regions.
30b9b25b9cc1 6850869: G1: RSet "scrubbing" scrubs too much tonyp parents: 811 diff changeset	1368 void set_bit_for_region(HeapRegion* hr) {
30b9b25b9cc1 6850869: G1: RSet "scrubbing" scrubs too much tonyp parents: 811 diff changeset	1369 assert(!hr->continuesHumongous(), "should have filtered those out");
30b9b25b9cc1 6850869: G1: RSet "scrubbing" scrubs too much tonyp parents: 811 diff changeset	1370
6010 720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 6008 diff changeset	1371 BitMap::idx_t index = (BitMap::idx_t) hr->hrs_index();
829 30b9b25b9cc1 6850869: G1: RSet "scrubbing" scrubs too much tonyp parents: 811 diff changeset	1372 if (!hr->startsHumongous()) {
30b9b25b9cc1 6850869: G1: RSet "scrubbing" scrubs too much tonyp parents: 811 diff changeset	1373 // Normal (non-humongous) case: just set the bit.
6010 720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 6008 diff changeset	1374 _region_bm->par_at_put(index, true);
829 30b9b25b9cc1 6850869: G1: RSet "scrubbing" scrubs too much tonyp parents: 811 diff changeset	1375 } else {
30b9b25b9cc1 6850869: G1: RSet "scrubbing" scrubs too much tonyp parents: 811 diff changeset	1376 // Starts humongous case: calculate how many regions are part of
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1377 // this humongous region and then set the bit range.
6254 a2f7274eb6ef 7114678: G1: various small fixes, code cleanup, and refactoring tonyp parents: 6220 diff changeset	1378 BitMap::idx_t end_index = (BitMap::idx_t) hr->last_hc_index();
6010 720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 6008 diff changeset	1379 _region_bm->par_at_put_range(index, end_index, true);
829 30b9b25b9cc1 6850869: G1: RSet "scrubbing" scrubs too much tonyp parents: 811 diff changeset	1380 }
30b9b25b9cc1 6850869: G1: RSet "scrubbing" scrubs too much tonyp parents: 811 diff changeset	1381 }
30b9b25b9cc1 6850869: G1: RSet "scrubbing" scrubs too much tonyp parents: 811 diff changeset	1382
6027 8a2e5a6a19a4 7143490: G1: Remove HeapRegion::_top_at_conc_mark_count johnc parents: 6011 diff changeset	1383 public:
6812 988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1384 CMCountDataClosureBase(G1CollectedHeap* g1h,
6027 8a2e5a6a19a4 7143490: G1: Remove HeapRegion::_top_at_conc_mark_count johnc parents: 6011 diff changeset	1385 BitMap* region_bm, BitMap* card_bm):
6812 988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1386 _g1h(g1h), _cm(g1h->concurrent_mark()),
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1387 _ct_bs((CardTableModRefBS*) (g1h->barrier_set())),
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1388 _region_bm(region_bm), _card_bm(card_bm) { }
6027 8a2e5a6a19a4 7143490: G1: Remove HeapRegion::_top_at_conc_mark_count johnc parents: 6011 diff changeset	1389 };
8a2e5a6a19a4 7143490: G1: Remove HeapRegion::_top_at_conc_mark_count johnc parents: 6011 diff changeset	1390
8a2e5a6a19a4 7143490: G1: Remove HeapRegion::_top_at_conc_mark_count johnc parents: 6011 diff changeset	1391 // Closure that calculates the # live objects per region. Used
8a2e5a6a19a4 7143490: G1: Remove HeapRegion::_top_at_conc_mark_count johnc parents: 6011 diff changeset	1392 // for verification purposes during the cleanup pause.
8a2e5a6a19a4 7143490: G1: Remove HeapRegion::_top_at_conc_mark_count johnc parents: 6011 diff changeset	1393 class CalcLiveObjectsClosure: public CMCountDataClosureBase {
8a2e5a6a19a4 7143490: G1: Remove HeapRegion::_top_at_conc_mark_count johnc parents: 6011 diff changeset	1394 CMBitMapRO* _bm;
8a2e5a6a19a4 7143490: G1: Remove HeapRegion::_top_at_conc_mark_count johnc parents: 6011 diff changeset	1395 size_t _region_marked_bytes;
8a2e5a6a19a4 7143490: G1: Remove HeapRegion::_top_at_conc_mark_count johnc parents: 6011 diff changeset	1396
8a2e5a6a19a4 7143490: G1: Remove HeapRegion::_top_at_conc_mark_count johnc parents: 6011 diff changeset	1397 public:
6812 988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1398 CalcLiveObjectsClosure(CMBitMapRO bm, G1CollectedHeap g1h,
6027 8a2e5a6a19a4 7143490: G1: Remove HeapRegion::_top_at_conc_mark_count johnc parents: 6011 diff changeset	1399 BitMap* region_bm, BitMap* card_bm) :
6812 988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1400 CMCountDataClosureBase(g1h, region_bm, card_bm),
6027 8a2e5a6a19a4 7143490: G1: Remove HeapRegion::_top_at_conc_mark_count johnc parents: 6011 diff changeset	1401 _bm(bm), _region_marked_bytes(0) { }
8a2e5a6a19a4 7143490: G1: Remove HeapRegion::_top_at_conc_mark_count johnc parents: 6011 diff changeset	1402
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1403 bool doHeapRegion(HeapRegion* hr) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1404
639 922c573ea67d 6815683: G1: SEGV during marking iveresov parents: 619 diff changeset	1405 if (hr->continuesHumongous()) {
829 30b9b25b9cc1 6850869: G1: RSet "scrubbing" scrubs too much tonyp parents: 811 diff changeset	1406 // We will ignore these here and process them when their
30b9b25b9cc1 6850869: G1: RSet "scrubbing" scrubs too much tonyp parents: 811 diff changeset	1407 // associated "starts humongous" region is processed (see
30b9b25b9cc1 6850869: G1: RSet "scrubbing" scrubs too much tonyp parents: 811 diff changeset	1408 // set_bit_for_heap_region()). Note that we cannot rely on their
30b9b25b9cc1 6850869: G1: RSet "scrubbing" scrubs too much tonyp parents: 811 diff changeset	1409 // associated "starts humongous" region to have their bit set to
30b9b25b9cc1 6850869: G1: RSet "scrubbing" scrubs too much tonyp parents: 811 diff changeset	1410 // 1 since, due to the region chunking in the parallel region
30b9b25b9cc1 6850869: G1: RSet "scrubbing" scrubs too much tonyp parents: 811 diff changeset	1411 // iteration, a "continues humongous" region might be visited
30b9b25b9cc1 6850869: G1: RSet "scrubbing" scrubs too much tonyp parents: 811 diff changeset	1412 // before its associated "starts humongous".
639 922c573ea67d 6815683: G1: SEGV during marking iveresov parents: 619 diff changeset	1413 return false;
922c573ea67d 6815683: G1: SEGV during marking iveresov parents: 619 diff changeset	1414 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1415
6812 988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1416 HeapWord* ntams = hr->next_top_at_mark_start();
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1417 HeapWord* start = hr->bottom();
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1418
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1419 assert(start <= hr->end() && start <= ntams && ntams <= hr->end(),
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1420 err_msg("Preconditions not met - "
6812 988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1421 "start: "PTR_FORMAT", ntams: "PTR_FORMAT", end: "PTR_FORMAT,
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1422 start, ntams, hr->end()));
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1423
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1424 // Find the first marked object at or after "start".
6812 988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1425 start = _bm->getNextMarkedWordAddress(start, ntams);
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1426
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1427 size_t marked_bytes = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1428
6812 988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1429 while (start < ntams) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1430 oop obj = oop(start);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1431 int obj_sz = obj->size();
6812 988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1432 HeapWord* obj_end = start + obj_sz;
6027 8a2e5a6a19a4 7143490: G1: Remove HeapRegion::_top_at_conc_mark_count johnc parents: 6011 diff changeset	1433
8a2e5a6a19a4 7143490: G1: Remove HeapRegion::_top_at_conc_mark_count johnc parents: 6011 diff changeset	1434 BitMap::idx_t start_idx = _cm->card_bitmap_index_for(start);
6812 988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1435 BitMap::idx_t end_idx = _cm->card_bitmap_index_for(obj_end);
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1436
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1437 // Note: if we're looking at the last region in heap - obj_end
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1438 // could be actually just beyond the end of the heap; end_idx
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1439 // will then correspond to a (non-existent) card that is also
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1440 // just beyond the heap.
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1441 if (_g1h->is_in_g1_reserved(obj_end) && !_ct_bs->is_card_aligned(obj_end)) {
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1442 // end of object is not card aligned - increment to cover
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1443 // all the cards spanned by the object
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1444 end_idx += 1;
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1445 }
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1446
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1447 // Set the bits in the card BM for the cards spanned by this object.
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1448 _cm->set_card_bitmap_range(_card_bm, start_idx, end_idx, true /* is_par */);
6027 8a2e5a6a19a4 7143490: G1: Remove HeapRegion::_top_at_conc_mark_count johnc parents: 6011 diff changeset	1449
8a2e5a6a19a4 7143490: G1: Remove HeapRegion::_top_at_conc_mark_count johnc parents: 6011 diff changeset	1450 // Add the size of this object to the number of marked bytes.
1030 dfdaf65c3423 6858886: G1: guarantee(_next_marked_bytes <= used(),"invariant") at heapRegion.hpp:359 apetrusenko parents: 1023 diff changeset	1451 marked_bytes += (size_t)obj_sz * HeapWordSize;
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1452
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1453 // Find the next marked object after this one.
6812 988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1454 start = _bm->getNextMarkedWordAddress(obj_end, ntams);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	1455 }
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1456
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1457 // Mark the allocated-since-marking portion...
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1458 HeapWord* top = hr->top();
6812 988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1459 if (ntams < top) {
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1460 BitMap::idx_t start_idx = _cm->card_bitmap_index_for(ntams);
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1461 BitMap::idx_t end_idx = _cm->card_bitmap_index_for(top);
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1462
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1463 // Note: if we're looking at the last region in heap - top
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1464 // could be actually just beyond the end of the heap; end_idx
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1465 // will then correspond to a (non-existent) card that is also
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1466 // just beyond the heap.
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1467 if (_g1h->is_in_g1_reserved(top) && !_ct_bs->is_card_aligned(top)) {
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1468 // end of object is not card aligned - increment to cover
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1469 // all the cards spanned by the object
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1470 end_idx += 1;
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1471 }
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1472 _cm->set_card_bitmap_range(_card_bm, start_idx, end_idx, true /* is_par */);
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1473
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1474 // This definitely means the region has live objects.
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1475 set_bit_for_region(hr);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1476 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1477
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1478 // Update the live region bitmap.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1479 if (marked_bytes > 0) {
829 30b9b25b9cc1 6850869: G1: RSet "scrubbing" scrubs too much tonyp parents: 811 diff changeset	1480 set_bit_for_region(hr);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1481 }
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1482
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1483 // Set the marked bytes for the current region so that
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1484 // it can be queried by a calling verificiation routine
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1485 _region_marked_bytes = marked_bytes;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1486
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1487 return false;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1488 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1489
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1490 size_t region_marked_bytes() const { return _region_marked_bytes; }
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1491 };
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1492
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1493 // Heap region closure used for verifying the counting data
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1494 // that was accumulated concurrently and aggregated during
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1495 // the remark pause. This closure is applied to the heap
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1496 // regions during the STW cleanup pause.
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1497
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1498 class VerifyLiveObjectDataHRClosure: public HeapRegionClosure {
6812 988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1499 G1CollectedHeap* _g1h;
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1500 ConcurrentMark* _cm;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1501 CalcLiveObjectsClosure _calc_cl;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1502 BitMap* _region_bm; // Region BM to be verified
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1503 BitMap* _card_bm; // Card BM to be verified
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1504 bool _verbose; // verbose output?
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1505
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1506 BitMap* _exp_region_bm; // Expected Region BM values
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1507 BitMap* _exp_card_bm; // Expected card BM values
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1508
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1509 int _failures;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1510
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1511 public:
6812 988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1512 VerifyLiveObjectDataHRClosure(G1CollectedHeap* g1h,
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1513 BitMap* region_bm,
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1514 BitMap* card_bm,
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1515 BitMap* exp_region_bm,
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1516 BitMap* exp_card_bm,
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1517 bool verbose) :
6812 988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1518 _g1h(g1h), _cm(g1h->concurrent_mark()),
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1519 _calc_cl(_cm->nextMarkBitMap(), g1h, exp_region_bm, exp_card_bm),
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1520 _region_bm(region_bm), _card_bm(card_bm), _verbose(verbose),
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1521 _exp_region_bm(exp_region_bm), _exp_card_bm(exp_card_bm),
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1522 _failures(0) { }
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1523
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1524 int failures() const { return _failures; }
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1525
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1526 bool doHeapRegion(HeapRegion* hr) {
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1527 if (hr->continuesHumongous()) {
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1528 // We will ignore these here and process them when their
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1529 // associated "starts humongous" region is processed (see
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1530 // set_bit_for_heap_region()). Note that we cannot rely on their
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1531 // associated "starts humongous" region to have their bit set to
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1532 // 1 since, due to the region chunking in the parallel region
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1533 // iteration, a "continues humongous" region might be visited
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1534 // before its associated "starts humongous".
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1535 return false;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1536 }
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1537
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1538 int failures = 0;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1539
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1540 // Call the CalcLiveObjectsClosure to walk the marking bitmap for
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1541 // this region and set the corresponding bits in the expected region
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1542 // and card bitmaps.
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1543 bool res = _calc_cl.doHeapRegion(hr);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1544 assert(res == false, "should be continuing");
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1545
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1546 MutexLockerEx x((_verbose ? ParGCRareEvent_lock : NULL),
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1547 Mutex::_no_safepoint_check_flag);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1548
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1549 // Verify the marked bytes for this region.
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1550 size_t exp_marked_bytes = _calc_cl.region_marked_bytes();
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1551 size_t act_marked_bytes = hr->next_marked_bytes();
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1552
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1553 // We're not OK if expected marked bytes > actual marked bytes. It means
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1554 // we have missed accounting some objects during the actual marking.
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1555 if (exp_marked_bytes > act_marked_bytes) {
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1556 if (_verbose) {
6010 720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 6008 diff changeset	1557 gclog_or_tty->print_cr("Region %u: marked bytes mismatch: "
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1558 "expected: " SIZE_FORMAT ", actual: " SIZE_FORMAT,
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1559 hr->hrs_index(), exp_marked_bytes, act_marked_bytes);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1560 }
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1561 failures += 1;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1562 }
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1563
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1564 // Verify the bit, for this region, in the actual and expected
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1565 // (which was just calculated) region bit maps.
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1566 // We're not OK if the bit in the calculated expected region
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1567 // bitmap is set and the bit in the actual region bitmap is not.
6010 720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 6008 diff changeset	1568 BitMap::idx_t index = (BitMap::idx_t) hr->hrs_index();
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1569
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1570 bool expected = _exp_region_bm->at(index);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1571 bool actual = _region_bm->at(index);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1572 if (expected && !actual) {
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1573 if (_verbose) {
6010 720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 6008 diff changeset	1574 gclog_or_tty->print_cr("Region %u: region bitmap mismatch: "
720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 6008 diff changeset	1575 "expected: %s, actual: %s",
720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 6008 diff changeset	1576 hr->hrs_index(),
720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 6008 diff changeset	1577 BOOL_TO_STR(expected), BOOL_TO_STR(actual));
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1578 }
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1579 failures += 1;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1580 }
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1581
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1582 // Verify that the card bit maps for the cards spanned by the current
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1583 // region match. We have an error if we have a set bit in the expected
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1584 // bit map and the corresponding bit in the actual bitmap is not set.
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1585
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1586 BitMap::idx_t start_idx = _cm->card_bitmap_index_for(hr->bottom());
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1587 BitMap::idx_t end_idx = _cm->card_bitmap_index_for(hr->top());
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1588
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1589 for (BitMap::idx_t i = start_idx; i < end_idx; i+=1) {
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1590 expected = _exp_card_bm->at(i);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1591 actual = _card_bm->at(i);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1592
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1593 if (expected && !actual) {
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1594 if (_verbose) {
6010 720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 6008 diff changeset	1595 gclog_or_tty->print_cr("Region %u: card bitmap mismatch at " SIZE_FORMAT ": "
720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 6008 diff changeset	1596 "expected: %s, actual: %s",
720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 6008 diff changeset	1597 hr->hrs_index(), i,
720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 6008 diff changeset	1598 BOOL_TO_STR(expected), BOOL_TO_STR(actual));
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1599 }
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1600 failures += 1;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1601 }
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1602 }
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1603
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1604 if (failures > 0 && _verbose) {
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1605 gclog_or_tty->print_cr("Region " HR_FORMAT ", ntams: " PTR_FORMAT ", "
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1606 "marked_bytes: calc/actual " SIZE_FORMAT "/" SIZE_FORMAT,
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1607 HR_FORMAT_PARAMS(hr), hr->next_top_at_mark_start(),
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1608 _calc_cl.region_marked_bytes(), hr->next_marked_bytes());
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1609 }
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1610
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1611 _failures += failures;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1612
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1613 // We could stop iteration over the heap when we
6027 8a2e5a6a19a4 7143490: G1: Remove HeapRegion::_top_at_conc_mark_count johnc parents: 6011 diff changeset	1614 // find the first violating region by returning true.
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1615 return false;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1616 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1617 };
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1618
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1619
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1620 class G1ParVerifyFinalCountTask: public AbstractGangTask {
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1621 protected:
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1622 G1CollectedHeap* _g1h;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1623 ConcurrentMark* _cm;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1624 BitMap* _actual_region_bm;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1625 BitMap* _actual_card_bm;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1626
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1627 uint _n_workers;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1628
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1629 BitMap* _expected_region_bm;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1630 BitMap* _expected_card_bm;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1631
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1632 int _failures;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1633 bool _verbose;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1634
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1635 public:
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1636 G1ParVerifyFinalCountTask(G1CollectedHeap* g1h,
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1637 BitMap* region_bm, BitMap* card_bm,
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1638 BitMap* expected_region_bm, BitMap* expected_card_bm)
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1639 : AbstractGangTask("G1 verify final counting"),
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1640 _g1h(g1h), _cm(_g1h->concurrent_mark()),
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1641 _actual_region_bm(region_bm), _actual_card_bm(card_bm),
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1642 _expected_region_bm(expected_region_bm), _expected_card_bm(expected_card_bm),
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1643 _failures(0), _verbose(false),
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1644 _n_workers(0) {
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1645 assert(VerifyDuringGC, "don't call this otherwise");
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1646
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1647 // Use the value already set as the number of active threads
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1648 // in the call to run_task().
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1649 if (G1CollectedHeap::use_parallel_gc_threads()) {
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1650 assert( _g1h->workers()->active_workers() > 0,
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1651 "Should have been previously set");
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1652 _n_workers = _g1h->workers()->active_workers();
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1653 } else {
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1654 _n_workers = 1;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1655 }
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1656
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1657 assert(_expected_card_bm->size() == _actual_card_bm->size(), "sanity");
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1658 assert(_expected_region_bm->size() == _actual_region_bm->size(), "sanity");
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1659
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1660 _verbose = _cm->verbose_medium();
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1661 }
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1662
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1663 void work(uint worker_id) {
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1664 assert(worker_id < _n_workers, "invariant");
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1665
6812 988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1666 VerifyLiveObjectDataHRClosure verify_cl(_g1h,
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1667 _actual_region_bm, _actual_card_bm,
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1668 _expected_region_bm,
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1669 _expected_card_bm,
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1670 _verbose);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1671
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1672 if (G1CollectedHeap::use_parallel_gc_threads()) {
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1673 _g1h->heap_region_par_iterate_chunked(&verify_cl,
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1674 worker_id,
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1675 _n_workers,
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1676 HeapRegion::VerifyCountClaimValue);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1677 } else {
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1678 _g1h->heap_region_iterate(&verify_cl);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1679 }
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1680
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1681 Atomic::add(verify_cl.failures(), &_failures);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1682 }
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1683
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1684 int failures() const { return _failures; }
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1685 };
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1686
6027 8a2e5a6a19a4 7143490: G1: Remove HeapRegion::_top_at_conc_mark_count johnc parents: 6011 diff changeset	1687 // Closure that finalizes the liveness counting data.
8a2e5a6a19a4 7143490: G1: Remove HeapRegion::_top_at_conc_mark_count johnc parents: 6011 diff changeset	1688 // Used during the cleanup pause.
8a2e5a6a19a4 7143490: G1: Remove HeapRegion::_top_at_conc_mark_count johnc parents: 6011 diff changeset	1689 // Sets the bits corresponding to the interval [NTAMS, top]
8a2e5a6a19a4 7143490: G1: Remove HeapRegion::_top_at_conc_mark_count johnc parents: 6011 diff changeset	1690 // (which contains the implicitly live objects) in the
8a2e5a6a19a4 7143490: G1: Remove HeapRegion::_top_at_conc_mark_count johnc parents: 6011 diff changeset	1691 // card liveness bitmap. Also sets the bit for each region,
8a2e5a6a19a4 7143490: G1: Remove HeapRegion::_top_at_conc_mark_count johnc parents: 6011 diff changeset	1692 // containing live data, in the region liveness bitmap.
8a2e5a6a19a4 7143490: G1: Remove HeapRegion::_top_at_conc_mark_count johnc parents: 6011 diff changeset	1693
8a2e5a6a19a4 7143490: G1: Remove HeapRegion::_top_at_conc_mark_count johnc parents: 6011 diff changeset	1694 class FinalCountDataUpdateClosure: public CMCountDataClosureBase {
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1695 public:
6812 988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1696 FinalCountDataUpdateClosure(G1CollectedHeap* g1h,
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1697 BitMap* region_bm,
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1698 BitMap* card_bm) :
6812 988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1699 CMCountDataClosureBase(g1h, region_bm, card_bm) { }
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1700
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1701 bool doHeapRegion(HeapRegion* hr) {
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1702
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1703 if (hr->continuesHumongous()) {
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1704 // We will ignore these here and process them when their
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1705 // associated "starts humongous" region is processed (see
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1706 // set_bit_for_heap_region()). Note that we cannot rely on their
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1707 // associated "starts humongous" region to have their bit set to
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1708 // 1 since, due to the region chunking in the parallel region
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1709 // iteration, a "continues humongous" region might be visited
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1710 // before its associated "starts humongous".
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1711 return false;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1712 }
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1713
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1714 HeapWord* ntams = hr->next_top_at_mark_start();
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1715 HeapWord* top = hr->top();
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1716
6027 8a2e5a6a19a4 7143490: G1: Remove HeapRegion::_top_at_conc_mark_count johnc parents: 6011 diff changeset	1717 assert(hr->bottom() <= ntams && ntams <= hr->end(), "Preconditions.");
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1718
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1719 // Mark the allocated-since-marking portion...
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1720 if (ntams < top) {
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1721 // This definitely means the region has live objects.
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1722 set_bit_for_region(hr);
6812 988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1723
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1724 // Now set the bits in the card bitmap for [ntams, top)
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1725 BitMap::idx_t start_idx = _cm->card_bitmap_index_for(ntams);
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1726 BitMap::idx_t end_idx = _cm->card_bitmap_index_for(top);
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1727
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1728 // Note: if we're looking at the last region in heap - top
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1729 // could be actually just beyond the end of the heap; end_idx
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1730 // will then correspond to a (non-existent) card that is also
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1731 // just beyond the heap.
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1732 if (_g1h->is_in_g1_reserved(top) && !_ct_bs->is_card_aligned(top)) {
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1733 // end of object is not card aligned - increment to cover
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1734 // all the cards spanned by the object
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1735 end_idx += 1;
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1736 }
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1737
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1738 assert(end_idx <= _card_bm->size(),
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1739 err_msg("oob: end_idx= "SIZE_FORMAT", bitmap size= "SIZE_FORMAT,
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1740 end_idx, _card_bm->size()));
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1741 assert(start_idx < _card_bm->size(),
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1742 err_msg("oob: start_idx= "SIZE_FORMAT", bitmap size= "SIZE_FORMAT,
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1743 start_idx, _card_bm->size()));
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1744
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1745 _cm->set_card_bitmap_range(_card_bm, start_idx, end_idx, true /* is_par */);
6725 da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6254 diff changeset	1746 }
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1747
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1748 // Set the bit for the region if it contains live data
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1749 if (hr->next_marked_bytes() > 0) {
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1750 set_bit_for_region(hr);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1751 }
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1752
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1753 return false;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1754 }
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1755 };
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1756
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1757 class G1ParFinalCountTask: public AbstractGangTask {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1758 protected:
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1759 G1CollectedHeap* _g1h;
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1760 ConcurrentMark* _cm;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1761 BitMap* _actual_region_bm;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1762 BitMap* _actual_card_bm;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1763
4728 441e946dc1af 7121618: Change type of number of GC workers to unsigned int. jmasa parents: 4711 diff changeset	1764 uint _n_workers;
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1765
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1766 public:
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1767 G1ParFinalCountTask(G1CollectedHeap* g1h, BitMap* region_bm, BitMap* card_bm)
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1768 : AbstractGangTask("G1 final counting"),
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1769 _g1h(g1h), _cm(_g1h->concurrent_mark()),
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1770 _actual_region_bm(region_bm), _actual_card_bm(card_bm),
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1771 _n_workers(0) {
4095 bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	1772 // Use the value already set as the number of active threads
6011 f7a8920427a6 7145441: G1: collection set chooser-related cleanup tonyp parents: 6010 diff changeset	1773 // in the call to run_task().
4095 bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	1774 if (G1CollectedHeap::use_parallel_gc_threads()) {
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	1775 assert( _g1h->workers()->active_workers() > 0,
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	1776 "Should have been previously set");
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	1777 _n_workers = _g1h->workers()->active_workers();
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	1778 } else {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1779 _n_workers = 1;
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	1780 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1781 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1782
4728 441e946dc1af 7121618: Change type of number of GC workers to unsigned int. jmasa parents: 4711 diff changeset	1783 void work(uint worker_id) {
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1784 assert(worker_id < _n_workers, "invariant");
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1785
6812 988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1786 FinalCountDataUpdateClosure final_update_cl(_g1h,
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1787 _actual_region_bm,
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1788 _actual_card_bm);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1789
1833 8b10f48633dc 6984287: Regularize how GC parallel workers are specified. jmasa parents: 1719 diff changeset	1790 if (G1CollectedHeap::use_parallel_gc_threads()) {
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1791 _g1h->heap_region_par_iterate_chunked(&final_update_cl,
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1792 worker_id,
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1793 _n_workers,
355 0edda524b58c 6722565: G1: assert !r->is_on_unclean_list() fires tonyp parents: 343 diff changeset	1794 HeapRegion::FinalCountClaimValue);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1795 } else {
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1796 _g1h->heap_region_iterate(&final_update_cl);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1797 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1798 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1799 };
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1800
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1801 class G1ParNoteEndTask;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1802
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1803 class G1NoteEndOfConcMarkClosure : public HeapRegionClosure {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1804 G1CollectedHeap* _g1;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1805 int _worker_num;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1806 size_t _max_live_bytes;
6010 720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 6008 diff changeset	1807 uint _regions_claimed;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1808 size_t _freed_bytes;
2173 97ba643ea3ed 7014261: G1: RSet-related failures tonyp parents: 2152 diff changeset	1809 FreeRegionList* _local_cleanup_list;
4072 8aae2050e83e 7092309: G1: introduce old region set tonyp parents: 4013 diff changeset	1810 OldRegionSet* _old_proxy_set;
2173 97ba643ea3ed 7014261: G1: RSet-related failures tonyp parents: 2152 diff changeset	1811 HumongousRegionSet* _humongous_proxy_set;
97ba643ea3ed 7014261: G1: RSet-related failures tonyp parents: 2152 diff changeset	1812 HRRSCleanupTask* _hrrs_cleanup_task;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1813 double _claimed_region_time;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1814 double _max_region_time;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1815
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1816 public:
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1817 G1NoteEndOfConcMarkClosure(G1CollectedHeap* g1,
2173 97ba643ea3ed 7014261: G1: RSet-related failures tonyp parents: 2152 diff changeset	1818 int worker_num,
97ba643ea3ed 7014261: G1: RSet-related failures tonyp parents: 2152 diff changeset	1819 FreeRegionList* local_cleanup_list,
4072 8aae2050e83e 7092309: G1: introduce old region set tonyp parents: 4013 diff changeset	1820 OldRegionSet* old_proxy_set,
2173 97ba643ea3ed 7014261: G1: RSet-related failures tonyp parents: 2152 diff changeset	1821 HumongousRegionSet* humongous_proxy_set,
4093 6071e0581859 7111795: G1: Various cleanups identified during walk through of changes for 6484965 johnc parents: 4072 diff changeset	1822 HRRSCleanupTask* hrrs_cleanup_task) :
6071e0581859 7111795: G1: Various cleanups identified during walk through of changes for 6484965 johnc parents: 4072 diff changeset	1823 _g1(g1), _worker_num(worker_num),
6071e0581859 7111795: G1: Various cleanups identified during walk through of changes for 6484965 johnc parents: 4072 diff changeset	1824 _max_live_bytes(0), _regions_claimed(0),
6071e0581859 7111795: G1: Various cleanups identified during walk through of changes for 6484965 johnc parents: 4072 diff changeset	1825 _freed_bytes(0),
6071e0581859 7111795: G1: Various cleanups identified during walk through of changes for 6484965 johnc parents: 4072 diff changeset	1826 _claimed_region_time(0.0), _max_region_time(0.0),
6071e0581859 7111795: G1: Various cleanups identified during walk through of changes for 6484965 johnc parents: 4072 diff changeset	1827 _local_cleanup_list(local_cleanup_list),
6071e0581859 7111795: G1: Various cleanups identified during walk through of changes for 6484965 johnc parents: 4072 diff changeset	1828 _old_proxy_set(old_proxy_set),
6071e0581859 7111795: G1: Various cleanups identified during walk through of changes for 6484965 johnc parents: 4072 diff changeset	1829 _humongous_proxy_set(humongous_proxy_set),
6071e0581859 7111795: G1: Various cleanups identified during walk through of changes for 6484965 johnc parents: 4072 diff changeset	1830 _hrrs_cleanup_task(hrrs_cleanup_task) { }
6071e0581859 7111795: G1: Various cleanups identified during walk through of changes for 6484965 johnc parents: 4072 diff changeset	1831
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1832 size_t freed_bytes() { return _freed_bytes; }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1833
4093 6071e0581859 7111795: G1: Various cleanups identified during walk through of changes for 6484965 johnc parents: 4072 diff changeset	1834 bool doHeapRegion(HeapRegion *hr) {
6254 a2f7274eb6ef 7114678: G1: various small fixes, code cleanup, and refactoring tonyp parents: 6220 diff changeset	1835 if (hr->continuesHumongous()) {
a2f7274eb6ef 7114678: G1: various small fixes, code cleanup, and refactoring tonyp parents: 6220 diff changeset	1836 return false;
a2f7274eb6ef 7114678: G1: various small fixes, code cleanup, and refactoring tonyp parents: 6220 diff changeset	1837 }
4093 6071e0581859 7111795: G1: Various cleanups identified during walk through of changes for 6484965 johnc parents: 4072 diff changeset	1838 // We use a claim value of zero here because all regions
6071e0581859 7111795: G1: Various cleanups identified during walk through of changes for 6484965 johnc parents: 4072 diff changeset	1839 // were claimed with value 1 in the FinalCount task.
6254 a2f7274eb6ef 7114678: G1: various small fixes, code cleanup, and refactoring tonyp parents: 6220 diff changeset	1840 _g1->reset_gc_time_stamps(hr);
a2f7274eb6ef 7114678: G1: various small fixes, code cleanup, and refactoring tonyp parents: 6220 diff changeset	1841 double start = os::elapsedTime();
a2f7274eb6ef 7114678: G1: various small fixes, code cleanup, and refactoring tonyp parents: 6220 diff changeset	1842 _regions_claimed++;
a2f7274eb6ef 7114678: G1: various small fixes, code cleanup, and refactoring tonyp parents: 6220 diff changeset	1843 hr->note_end_of_marking();
a2f7274eb6ef 7114678: G1: various small fixes, code cleanup, and refactoring tonyp parents: 6220 diff changeset	1844 _max_live_bytes += hr->max_live_bytes();
a2f7274eb6ef 7114678: G1: various small fixes, code cleanup, and refactoring tonyp parents: 6220 diff changeset	1845 _g1->free_region_if_empty(hr,
a2f7274eb6ef 7114678: G1: various small fixes, code cleanup, and refactoring tonyp parents: 6220 diff changeset	1846 &_freed_bytes,
a2f7274eb6ef 7114678: G1: various small fixes, code cleanup, and refactoring tonyp parents: 6220 diff changeset	1847 _local_cleanup_list,
a2f7274eb6ef 7114678: G1: various small fixes, code cleanup, and refactoring tonyp parents: 6220 diff changeset	1848 _old_proxy_set,
a2f7274eb6ef 7114678: G1: various small fixes, code cleanup, and refactoring tonyp parents: 6220 diff changeset	1849 _humongous_proxy_set,
a2f7274eb6ef 7114678: G1: various small fixes, code cleanup, and refactoring tonyp parents: 6220 diff changeset	1850 _hrrs_cleanup_task,
a2f7274eb6ef 7114678: G1: various small fixes, code cleanup, and refactoring tonyp parents: 6220 diff changeset	1851 true /* par */);
a2f7274eb6ef 7114678: G1: various small fixes, code cleanup, and refactoring tonyp parents: 6220 diff changeset	1852 double region_time = (os::elapsedTime() - start);
a2f7274eb6ef 7114678: G1: various small fixes, code cleanup, and refactoring tonyp parents: 6220 diff changeset	1853 _claimed_region_time += region_time;
a2f7274eb6ef 7114678: G1: various small fixes, code cleanup, and refactoring tonyp parents: 6220 diff changeset	1854 if (region_time > _max_region_time) {
a2f7274eb6ef 7114678: G1: various small fixes, code cleanup, and refactoring tonyp parents: 6220 diff changeset	1855 _max_region_time = region_time;
4093 6071e0581859 7111795: G1: Various cleanups identified during walk through of changes for 6484965 johnc parents: 4072 diff changeset	1856 }
6071e0581859 7111795: G1: Various cleanups identified during walk through of changes for 6484965 johnc parents: 4072 diff changeset	1857 return false;
6071e0581859 7111795: G1: Various cleanups identified during walk through of changes for 6484965 johnc parents: 4072 diff changeset	1858 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1859
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1860 size_t max_live_bytes() { return _max_live_bytes; }
6010 720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 6008 diff changeset	1861 uint regions_claimed() { return _regions_claimed; }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1862 double claimed_region_time_sec() { return _claimed_region_time; }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1863 double max_region_time_sec() { return _max_region_time; }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1864 };
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1865
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1866 class G1ParNoteEndTask: public AbstractGangTask {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1867 friend class G1NoteEndOfConcMarkClosure;
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	1868
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1869 protected:
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1870 G1CollectedHeap* _g1h;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1871 size_t _max_live_bytes;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1872 size_t _freed_bytes;
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	1873 FreeRegionList* _cleanup_list;
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	1874
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1875 public:
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1876 G1ParNoteEndTask(G1CollectedHeap* g1h,
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	1877 FreeRegionList* cleanup_list) :
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1878 AbstractGangTask("G1 note end"), _g1h(g1h),
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	1879 _max_live_bytes(0), _freed_bytes(0), _cleanup_list(cleanup_list) { }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1880
4728 441e946dc1af 7121618: Change type of number of GC workers to unsigned int. jmasa parents: 4711 diff changeset	1881 void work(uint worker_id) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1882 double start = os::elapsedTime();
2173 97ba643ea3ed 7014261: G1: RSet-related failures tonyp parents: 2152 diff changeset	1883 FreeRegionList local_cleanup_list("Local Cleanup List");
4072 8aae2050e83e 7092309: G1: introduce old region set tonyp parents: 4013 diff changeset	1884 OldRegionSet old_proxy_set("Local Cleanup Old Proxy Set");
2173 97ba643ea3ed 7014261: G1: RSet-related failures tonyp parents: 2152 diff changeset	1885 HumongousRegionSet humongous_proxy_set("Local Cleanup Humongous Proxy Set");
97ba643ea3ed 7014261: G1: RSet-related failures tonyp parents: 2152 diff changeset	1886 HRRSCleanupTask hrrs_cleanup_task;
4728 441e946dc1af 7121618: Change type of number of GC workers to unsigned int. jmasa parents: 4711 diff changeset	1887 G1NoteEndOfConcMarkClosure g1_note_end(_g1h, worker_id, &local_cleanup_list,
4072 8aae2050e83e 7092309: G1: introduce old region set tonyp parents: 4013 diff changeset	1888 &old_proxy_set,
2173 97ba643ea3ed 7014261: G1: RSet-related failures tonyp parents: 2152 diff changeset	1889 &humongous_proxy_set,
97ba643ea3ed 7014261: G1: RSet-related failures tonyp parents: 2152 diff changeset	1890 &hrrs_cleanup_task);
1833 8b10f48633dc 6984287: Regularize how GC parallel workers are specified. jmasa parents: 1719 diff changeset	1891 if (G1CollectedHeap::use_parallel_gc_threads()) {
4728 441e946dc1af 7121618: Change type of number of GC workers to unsigned int. jmasa parents: 4711 diff changeset	1892 _g1h->heap_region_par_iterate_chunked(&g1_note_end, worker_id,
4095 bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	1893 _g1h->workers()->active_workers(),
355 0edda524b58c 6722565: G1: assert !r->is_on_unclean_list() fires tonyp parents: 343 diff changeset	1894 HeapRegion::NoteEndClaimValue);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1895 } else {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1896 _g1h->heap_region_iterate(&g1_note_end);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1897 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1898 assert(g1_note_end.complete(), "Shouldn't have yielded!");
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1899
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	1900 // Now update the lists
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	1901 _g1h->update_sets_after_freeing_regions(g1_note_end.freed_bytes(),
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	1902 NULL /* free_list */,
4072 8aae2050e83e 7092309: G1: introduce old region set tonyp parents: 4013 diff changeset	1903 &old_proxy_set,
2173 97ba643ea3ed 7014261: G1: RSet-related failures tonyp parents: 2152 diff changeset	1904 &humongous_proxy_set,
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	1905 true /* par */);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1906 {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1907 MutexLockerEx x(ParGCRareEvent_lock, Mutex::_no_safepoint_check_flag);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1908 _max_live_bytes += g1_note_end.max_live_bytes();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1909 _freed_bytes += g1_note_end.freed_bytes();
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	1910
3778 5f6f2615433a 7049999: G1: Make the G1PrintHeapRegions output consistent and complete tonyp parents: 3776 diff changeset	1911 // If we iterate over the global cleanup list at the end of
5f6f2615433a 7049999: G1: Make the G1PrintHeapRegions output consistent and complete tonyp parents: 3776 diff changeset	1912 // cleanup to do this printing we will not guarantee to only
5f6f2615433a 7049999: G1: Make the G1PrintHeapRegions output consistent and complete tonyp parents: 3776 diff changeset	1913 // generate output for the newly-reclaimed regions (the list
5f6f2615433a 7049999: G1: Make the G1PrintHeapRegions output consistent and complete tonyp parents: 3776 diff changeset	1914 // might not be empty at the beginning of cleanup; we might
5f6f2615433a 7049999: G1: Make the G1PrintHeapRegions output consistent and complete tonyp parents: 3776 diff changeset	1915 // still be working on its previous contents). So we do the
5f6f2615433a 7049999: G1: Make the G1PrintHeapRegions output consistent and complete tonyp parents: 3776 diff changeset	1916 // printing here, before we append the new regions to the global
5f6f2615433a 7049999: G1: Make the G1PrintHeapRegions output consistent and complete tonyp parents: 3776 diff changeset	1917 // cleanup list.
5f6f2615433a 7049999: G1: Make the G1PrintHeapRegions output consistent and complete tonyp parents: 3776 diff changeset	1918
5f6f2615433a 7049999: G1: Make the G1PrintHeapRegions output consistent and complete tonyp parents: 3776 diff changeset	1919 G1HRPrinter* hr_printer = _g1h->hr_printer();
5f6f2615433a 7049999: G1: Make the G1PrintHeapRegions output consistent and complete tonyp parents: 3776 diff changeset	1920 if (hr_printer->is_active()) {
5f6f2615433a 7049999: G1: Make the G1PrintHeapRegions output consistent and complete tonyp parents: 3776 diff changeset	1921 HeapRegionLinkedListIterator iter(&local_cleanup_list);
5f6f2615433a 7049999: G1: Make the G1PrintHeapRegions output consistent and complete tonyp parents: 3776 diff changeset	1922 while (iter.more_available()) {
5f6f2615433a 7049999: G1: Make the G1PrintHeapRegions output consistent and complete tonyp parents: 3776 diff changeset	1923 HeapRegion* hr = iter.get_next();
5f6f2615433a 7049999: G1: Make the G1PrintHeapRegions output consistent and complete tonyp parents: 3776 diff changeset	1924 hr_printer->cleanup(hr);
5f6f2615433a 7049999: G1: Make the G1PrintHeapRegions output consistent and complete tonyp parents: 3776 diff changeset	1925 }
5f6f2615433a 7049999: G1: Make the G1PrintHeapRegions output consistent and complete tonyp parents: 3776 diff changeset	1926 }
5f6f2615433a 7049999: G1: Make the G1PrintHeapRegions output consistent and complete tonyp parents: 3776 diff changeset	1927
2173 97ba643ea3ed 7014261: G1: RSet-related failures tonyp parents: 2152 diff changeset	1928 _cleanup_list->add_as_tail(&local_cleanup_list);
97ba643ea3ed 7014261: G1: RSet-related failures tonyp parents: 2152 diff changeset	1929 assert(local_cleanup_list.is_empty(), "post-condition");
97ba643ea3ed 7014261: G1: RSet-related failures tonyp parents: 2152 diff changeset	1930
97ba643ea3ed 7014261: G1: RSet-related failures tonyp parents: 2152 diff changeset	1931 HeapRegionRemSet::finish_cleanup_task(&hrrs_cleanup_task);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1932 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1933 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1934 size_t max_live_bytes() { return _max_live_bytes; }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1935 size_t freed_bytes() { return _freed_bytes; }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1936 };
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1937
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1938 class G1ParScrubRemSetTask: public AbstractGangTask {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1939 protected:
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1940 G1RemSet* _g1rs;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1941 BitMap* _region_bm;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1942 BitMap* _card_bm;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1943 public:
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1944 G1ParScrubRemSetTask(G1CollectedHeap* g1h,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1945 BitMap* region_bm, BitMap* card_bm) :
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1946 AbstractGangTask("G1 ScrubRS"), _g1rs(g1h->g1_rem_set()),
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1947 _region_bm(region_bm), _card_bm(card_bm) { }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1948
4728 441e946dc1af 7121618: Change type of number of GC workers to unsigned int. jmasa parents: 4711 diff changeset	1949 void work(uint worker_id) {
1833 8b10f48633dc 6984287: Regularize how GC parallel workers are specified. jmasa parents: 1719 diff changeset	1950 if (G1CollectedHeap::use_parallel_gc_threads()) {
4728 441e946dc1af 7121618: Change type of number of GC workers to unsigned int. jmasa parents: 4711 diff changeset	1951 _g1rs->scrub_par(_region_bm, _card_bm, worker_id,
355 0edda524b58c 6722565: G1: assert !r->is_on_unclean_list() fires tonyp parents: 343 diff changeset	1952 HeapRegion::ScrubRemSetClaimValue);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1953 } else {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1954 _g1rs->scrub(_region_bm, _card_bm);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1955 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1956 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1957
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1958 };
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1959
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1960 void ConcurrentMark::cleanup() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1961 // world is stopped at this checkpoint
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1962 assert(SafepointSynchronize::is_at_safepoint(),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1963 "world should be stopped");
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1964 G1CollectedHeap* g1h = G1CollectedHeap::heap();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1965
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1966 // If a full collection has happened, we shouldn't do this.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1967 if (has_aborted()) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1968 g1h->set_marking_complete(); // So bitmap clearing isn't confused
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1969 return;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1970 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1971
4072 8aae2050e83e 7092309: G1: introduce old region set tonyp parents: 4013 diff changeset	1972 HRSPhaseSetter x(HRSPhaseCleanup);
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	1973 g1h->verify_region_sets_optional();
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	1974
845 df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 831 diff changeset	1975 if (VerifyDuringGC) {
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 831 diff changeset	1976 HandleMark hm; // handle scope
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 831 diff changeset	1977 Universe::heap()->prepare_for_verify();
10186 b06ac540229e 8013132: Add a flag to turn off the output of the verbose verification code stefank parents: 9076 diff changeset	1978 Universe::verify(VerifyOption_G1UsePrevMarking,
b06ac540229e 8013132: Add a flag to turn off the output of the verbose verification code stefank parents: 9076 diff changeset	1979 " VerifyDuringGC:(before)");
845 df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 831 diff changeset	1980 }
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 831 diff changeset	1981
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1982 G1CollectorPolicy* g1p = G1CollectedHeap::heap()->g1_policy();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1983 g1p->record_concurrent_mark_cleanup_start();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1984
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1985 double start = os::elapsedTime();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1986
2173 97ba643ea3ed 7014261: G1: RSet-related failures tonyp parents: 2152 diff changeset	1987 HeapRegionRemSet::reset_for_cleanup_tasks();
97ba643ea3ed 7014261: G1: RSet-related failures tonyp parents: 2152 diff changeset	1988
4728 441e946dc1af 7121618: Change type of number of GC workers to unsigned int. jmasa parents: 4711 diff changeset	1989 uint n_workers;
4095 bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	1990
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1991 // Do counting once more with the world stopped for good measure.
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1992 G1ParFinalCountTask g1_par_count_task(g1h, &_region_bm, &_card_bm);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1993
1833 8b10f48633dc 6984287: Regularize how GC parallel workers are specified. jmasa parents: 1719 diff changeset	1994 if (G1CollectedHeap::use_parallel_gc_threads()) {
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1995 assert(g1h->check_heap_region_claim_values(HeapRegion::InitialClaimValue),
355 0edda524b58c 6722565: G1: assert !r->is_on_unclean_list() fires tonyp parents: 343 diff changeset	1996 "sanity check");
0edda524b58c 6722565: G1: assert !r->is_on_unclean_list() fires tonyp parents: 343 diff changeset	1997
4711 adedfbbf0360 7120038: G1: ParallelGCThreads==0 is broken johnc parents: 4097 diff changeset	1998 g1h->set_par_threads();
adedfbbf0360 7120038: G1: ParallelGCThreads==0 is broken johnc parents: 4097 diff changeset	1999 n_workers = g1h->n_par_threads();
4728 441e946dc1af 7121618: Change type of number of GC workers to unsigned int. jmasa parents: 4711 diff changeset	2000 assert(g1h->n_par_threads() == n_workers,
4711 adedfbbf0360 7120038: G1: ParallelGCThreads==0 is broken johnc parents: 4097 diff changeset	2001 "Should not have been reset");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2002 g1h->workers()->run_task(&g1_par_count_task);
4095 bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	2003 // Done with the parallel phase so reset to 0.
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2004 g1h->set_par_threads(0);
355 0edda524b58c 6722565: G1: assert !r->is_on_unclean_list() fires tonyp parents: 343 diff changeset	2005
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	2006 assert(g1h->check_heap_region_claim_values(HeapRegion::FinalCountClaimValue),
355 0edda524b58c 6722565: G1: assert !r->is_on_unclean_list() fires tonyp parents: 343 diff changeset	2007 "sanity check");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2008 } else {
4711 adedfbbf0360 7120038: G1: ParallelGCThreads==0 is broken johnc parents: 4097 diff changeset	2009 n_workers = 1;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2010 g1_par_count_task.work(0);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2011 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2012
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	2013 if (VerifyDuringGC) {
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	2014 // Verify that the counting data accumulated during marking matches
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	2015 // that calculated by walking the marking bitmap.
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	2016
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	2017 // Bitmaps to hold expected values
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	2018 BitMap expected_region_bm(_region_bm.size(), false);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	2019 BitMap expected_card_bm(_card_bm.size(), false);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	2020
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	2021 G1ParVerifyFinalCountTask g1_par_verify_task(g1h,
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	2022 &_region_bm,
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	2023 &_card_bm,
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	2024 &expected_region_bm,
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	2025 &expected_card_bm);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	2026
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	2027 if (G1CollectedHeap::use_parallel_gc_threads()) {
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	2028 g1h->set_par_threads((int)n_workers);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	2029 g1h->workers()->run_task(&g1_par_verify_task);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	2030 // Done with the parallel phase so reset to 0.
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	2031 g1h->set_par_threads(0);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	2032
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	2033 assert(g1h->check_heap_region_claim_values(HeapRegion::VerifyCountClaimValue),
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	2034 "sanity check");
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	2035 } else {
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	2036 g1_par_verify_task.work(0);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	2037 }
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	2038
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	2039 guarantee(g1_par_verify_task.failures() == 0, "Unexpected accounting failures");
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	2040 }
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	2041
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2042 size_t start_used_bytes = g1h->used();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2043 g1h->set_marking_complete();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2044
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2045 double count_end = os::elapsedTime();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2046 double this_final_counting_time = (count_end - start);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2047 _total_counting_time += this_final_counting_time;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2048
2435 371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	2049 if (G1PrintRegionLivenessInfo) {
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	2050 G1PrintRegionLivenessInfoClosure cl(gclog_or_tty, "Post-Marking");
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	2051 _g1h->heap_region_iterate(&cl);
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	2052 }
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	2053
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2054 // Install newly created mark bitMap as "prev".
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2055 swapMarkBitMaps();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2056
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2057 g1h->reset_gc_time_stamp();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2058
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2059 // Note end of marking in all heap regions.
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2060 G1ParNoteEndTask g1_par_note_end_task(g1h, &_cleanup_list);
1833 8b10f48633dc 6984287: Regularize how GC parallel workers are specified. jmasa parents: 1719 diff changeset	2061 if (G1CollectedHeap::use_parallel_gc_threads()) {
4095 bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	2062 g1h->set_par_threads((int)n_workers);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2063 g1h->workers()->run_task(&g1_par_note_end_task);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2064 g1h->set_par_threads(0);
355 0edda524b58c 6722565: G1: assert !r->is_on_unclean_list() fires tonyp parents: 343 diff changeset	2065
0edda524b58c 6722565: G1: assert !r->is_on_unclean_list() fires tonyp parents: 343 diff changeset	2066 assert(g1h->check_heap_region_claim_values(HeapRegion::NoteEndClaimValue),
0edda524b58c 6722565: G1: assert !r->is_on_unclean_list() fires tonyp parents: 343 diff changeset	2067 "sanity check");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2068 } else {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2069 g1_par_note_end_task.work(0);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2070 }
6254 a2f7274eb6ef 7114678: G1: various small fixes, code cleanup, and refactoring tonyp parents: 6220 diff changeset	2071 g1h->check_gc_time_stamps();
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2072
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2073 if (!cleanup_list_is_empty()) {
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2074 // The cleanup list is not empty, so we'll have to process it
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2075 // concurrently. Notify anyone else that might be wanting free
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2076 // regions that there will be more free regions coming soon.
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2077 g1h->set_free_regions_coming();
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2078 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2079
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2080 // call below, since it affects the metric by which we sort the heap
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2081 // regions.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2082 if (G1ScrubRemSets) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2083 double rs_scrub_start = os::elapsedTime();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2084 G1ParScrubRemSetTask g1_par_scrub_rs_task(g1h, &_region_bm, &_card_bm);
1833 8b10f48633dc 6984287: Regularize how GC parallel workers are specified. jmasa parents: 1719 diff changeset	2085 if (G1CollectedHeap::use_parallel_gc_threads()) {
4095 bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	2086 g1h->set_par_threads((int)n_workers);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2087 g1h->workers()->run_task(&g1_par_scrub_rs_task);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2088 g1h->set_par_threads(0);
355 0edda524b58c 6722565: G1: assert !r->is_on_unclean_list() fires tonyp parents: 343 diff changeset	2089
0edda524b58c 6722565: G1: assert !r->is_on_unclean_list() fires tonyp parents: 343 diff changeset	2090 assert(g1h->check_heap_region_claim_values(
0edda524b58c 6722565: G1: assert !r->is_on_unclean_list() fires tonyp parents: 343 diff changeset	2091 HeapRegion::ScrubRemSetClaimValue),
0edda524b58c 6722565: G1: assert !r->is_on_unclean_list() fires tonyp parents: 343 diff changeset	2092 "sanity check");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2093 } else {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2094 g1_par_scrub_rs_task.work(0);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2095 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2096
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2097 double rs_scrub_end = os::elapsedTime();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2098 double this_rs_scrub_time = (rs_scrub_end - rs_scrub_start);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2099 _total_rs_scrub_time += this_rs_scrub_time;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2100 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2101
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2102 // this will also free any regions totally full of garbage objects,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2103 // and sort the regions.
4095 bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	2104 g1h->g1_policy()->record_concurrent_mark_cleanup_end((int)n_workers);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2105
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2106 // Statistics.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2107 double end = os::elapsedTime();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2108 _cleanup_times.add((end - start) * 1000.0);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2109
6007 5c86f8211d1e 7160728: Introduce an extra logging level for G1 logging brutisso parents: 5988 diff changeset	2110 if (G1Log::fine()) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2111 g1h->print_size_transition(gclog_or_tty,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2112 start_used_bytes,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2113 g1h->used(),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2114 g1h->capacity());
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2115 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2116
3979 4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3977 diff changeset	2117 // Clean up will have freed any regions completely full of garbage.
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3977 diff changeset	2118 // Update the soft reference policy with the new heap occupancy.
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3977 diff changeset	2119 Universe::update_heap_info_at_gc();
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3977 diff changeset	2120
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2121 // We need to make this be a "collection" so any collection pause that
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2122 // races with it goes around and waits for completeCleanup to finish.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2123 g1h->increment_total_collections();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2124
4830 0b3d1ec6eaee 7097586: G1: improve the per-space output when using jmap -heap tonyp parents: 4828 diff changeset	2125 // We reclaimed old regions so we should calculate the sizes to make
0b3d1ec6eaee 7097586: G1: improve the per-space output when using jmap -heap tonyp parents: 4828 diff changeset	2126 // sure we update the old gen/space data.
0b3d1ec6eaee 7097586: G1: improve the per-space output when using jmap -heap tonyp parents: 4828 diff changeset	2127 g1h->g1mm()->update_sizes();
0b3d1ec6eaee 7097586: G1: improve the per-space output when using jmap -heap tonyp parents: 4828 diff changeset	2128
751 20c6f43950b5 6490395: G1: Tidy up command line flags. johnc parents: 647 diff changeset	2129 if (VerifyDuringGC) {
845 df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 831 diff changeset	2130 HandleMark hm; // handle scope
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 831 diff changeset	2131 Universe::heap()->prepare_for_verify();
10186 b06ac540229e 8013132: Add a flag to turn off the output of the verbose verification code stefank parents: 9076 diff changeset	2132 Universe::verify(VerifyOption_G1UsePrevMarking,
b06ac540229e 8013132: Add a flag to turn off the output of the verbose verification code stefank parents: 9076 diff changeset	2133 " VerifyDuringGC:(after)");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2134 }
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2135
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2136 g1h->verify_region_sets_optional();
10405 f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10290 diff changeset	2137 g1h->trace_heap_after_concurrent_cycle();
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2138 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2139
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2140 void ConcurrentMark::completeCleanup() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2141 if (has_aborted()) return;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2142
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2143 G1CollectedHeap* g1h = G1CollectedHeap::heap();
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2144
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2145 _cleanup_list.verify_optional();
2361 1216415d8e35 7014923: G1: code cleanup tonyp parents: 2177 diff changeset	2146 FreeRegionList tmp_free_list("Tmp Free List");
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2147
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2148 if (G1ConcRegionFreeingVerbose) {
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2149 gclog_or_tty->print_cr("G1ConcRegionFreeing [complete cleanup] : "
6010 720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 6008 diff changeset	2150 "cleanup list has %u entries",
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2151 _cleanup_list.length());
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2152 }
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2153
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2154 // Noone else should be accessing the _cleanup_list at this point,
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2155 // so it's not necessary to take any locks
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2156 while (!_cleanup_list.is_empty()) {
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2157 HeapRegion* hr = _cleanup_list.remove_head();
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2158 assert(hr != NULL, "the list was not empty");
3317 063382f9b575 7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...) tonyp parents: 3316 diff changeset	2159 hr->par_clear();
2361 1216415d8e35 7014923: G1: code cleanup tonyp parents: 2177 diff changeset	2160 tmp_free_list.add_as_tail(hr);
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2161
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2162 // Instead of adding one region at a time to the secondary_free_list,
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2163 // we accumulate them in the local list and move them a few at a
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2164 // time. This also cuts down on the number of notify_all() calls
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2165 // we do during this process. We'll also append the local list when
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2166 // _cleanup_list is empty (which means we just removed the last
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2167 // region from the _cleanup_list).
2361 1216415d8e35 7014923: G1: code cleanup tonyp parents: 2177 diff changeset	2168 if ((tmp_free_list.length() % G1SecondaryFreeListAppendLength == 0) \|\|
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2169 _cleanup_list.is_empty()) {
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2170 if (G1ConcRegionFreeingVerbose) {
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2171 gclog_or_tty->print_cr("G1ConcRegionFreeing [complete cleanup] : "
6010 720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 6008 diff changeset	2172 "appending %u entries to the secondary_free_list, "
720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 6008 diff changeset	2173 "cleanup list still has %u entries",
2361 1216415d8e35 7014923: G1: code cleanup tonyp parents: 2177 diff changeset	2174 tmp_free_list.length(),
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2175 _cleanup_list.length());
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2176 }
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2177
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2178 {
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2179 MutexLockerEx x(SecondaryFreeList_lock, Mutex::_no_safepoint_check_flag);
2361 1216415d8e35 7014923: G1: code cleanup tonyp parents: 2177 diff changeset	2180 g1h->secondary_free_list_add_as_tail(&tmp_free_list);
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2181 SecondaryFreeList_lock->notify_all();
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2182 }
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2183
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2184 if (G1StressConcRegionFreeing) {
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2185 for (uintx i = 0; i < G1StressConcRegionFreeingDelayMillis; ++i) {
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2186 os::sleep(Thread::current(), (jlong) 1, false);
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2187 }
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2188 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2189 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2190 }
2361 1216415d8e35 7014923: G1: code cleanup tonyp parents: 2177 diff changeset	2191 assert(tmp_free_list.is_empty(), "post-condition");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2192 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2193
8014 f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2194 // Supporting Object and Oop closures for reference discovery
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2195 // and processing in during marking
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2196
2037 b03260081e9b 7006113: G1: Initialize ReferenceProcessor::_is_alive_non_header field johnc parents: 1974 diff changeset	2197 bool G1CMIsAliveClosure::do_object_b(oop obj) {
b03260081e9b 7006113: G1: Initialize ReferenceProcessor::_is_alive_non_header field johnc parents: 1974 diff changeset	2198 HeapWord* addr = (HeapWord*)obj;
b03260081e9b 7006113: G1: Initialize ReferenceProcessor::_is_alive_non_header field johnc parents: 1974 diff changeset	2199 return addr != NULL &&
b03260081e9b 7006113: G1: Initialize ReferenceProcessor::_is_alive_non_header field johnc parents: 1974 diff changeset	2200 (!_g1->is_in_g1_reserved(addr) \|\| !_g1->is_obj_ill(obj));
b03260081e9b 7006113: G1: Initialize ReferenceProcessor::_is_alive_non_header field johnc parents: 1974 diff changeset	2201 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2202
8014 f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2203 // 'Keep Alive' oop closure used by both serial parallel reference processing.
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2204 // Uses the CMTask associated with a worker thread (for serial reference
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2205 // processing the CMTask for worker 0 is used) to preserve (mark) and
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2206 // trace referent objects.
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2207 //
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2208 // Using the CMTask and embedded local queues avoids having the worker
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2209 // threads operating on the global mark stack. This reduces the risk
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2210 // of overflowing the stack - which we would rather avoid at this late
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2211 // state. Also using the tasks' local queues removes the potential
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2212 // of the workers interfering with each other that could occur if
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2213 // operating on the global stack.
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2214
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2215 class G1CMKeepAliveAndDrainClosure: public OopClosure {
8787 fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2216 ConcurrentMark* _cm;
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2217 CMTask* _task;
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2218 int _ref_counter_limit;
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2219 int _ref_counter;
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2220 bool _is_serial;
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2221 public:
8787 fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2222 G1CMKeepAliveAndDrainClosure(ConcurrentMark* cm, CMTask* task, bool is_serial) :
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2223 _cm(cm), _task(task), _is_serial(is_serial),
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2224 _ref_counter_limit(G1RefProcDrainInterval) {
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2225 assert(_ref_counter_limit > 0, "sanity");
8787 fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2226 assert(!_is_serial \|\| _task->worker_id() == 0, "only task 0 for serial code");
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2227 _ref_counter = _ref_counter_limit;
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2228 }
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2229
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2230 virtual void do_oop(narrowOop* p) { do_oop_work(p); }
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2231 virtual void do_oop( oop* p) { do_oop_work(p); }
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2232
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2233 template <class T> void do_oop_work(T* p) {
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2234 if (!_cm->has_overflown()) {
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2235 oop obj = oopDesc::load_decode_heap_oop(p);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	2236 if (_cm->verbose_high()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	2237 gclog_or_tty->print_cr("\t[%u] we're looking at location "
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2238 "*"PTR_FORMAT" = "PTR_FORMAT,
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	2239 _task->worker_id(), p, (void*) obj);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	2240 }
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2241
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2242 _task->deal_with_reference(obj);
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2243 _ref_counter--;
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2244
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2245 if (_ref_counter == 0) {
8014 f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2246 // We have dealt with _ref_counter_limit references, pushing them
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2247 // and objects reachable from them on to the local stack (and
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2248 // possibly the global stack). Call CMTask::do_marking_step() to
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2249 // process these entries.
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2250 //
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2251 // We call CMTask::do_marking_step() in a loop, which we'll exit if
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2252 // there's nothing more to do (i.e. we're done with the entries that
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2253 // were pushed as a result of the CMTask::deal_with_reference() calls
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2254 // above) or we overflow.
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2255 //
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2256 // Note: CMTask::do_marking_step() can set the CMTask::has_aborted()
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2257 // flag while there may still be some work to do. (See the comment at
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2258 // the beginning of CMTask::do_marking_step() for those conditions -
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2259 // one of which is reaching the specified time target.) It is only
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2260 // when CMTask::do_marking_step() returns without setting the
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2261 // has_aborted() flag that the marking step has completed.
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2262 do {
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2263 double mark_step_duration_ms = G1ConcMarkStepDurationMillis;
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2264 _task->do_marking_step(mark_step_duration_ms,
8787 fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2265 false /* do_termination */,
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2266 _is_serial);
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2267 } while (_task->has_aborted() && !_cm->has_overflown());
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2268 _ref_counter = _ref_counter_limit;
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2269 }
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2270 } else {
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	2271 if (_cm->verbose_high()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	2272 gclog_or_tty->print_cr("\t[%u] CM Overflow", _task->worker_id());
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	2273 }
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2274 }
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2275 }
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2276 };
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2277
8014 f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2278 // 'Drain' oop closure used by both serial and parallel reference processing.
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2279 // Uses the CMTask associated with a given worker thread (for serial
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2280 // reference processing the CMtask for worker 0 is used). Calls the
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2281 // do_marking_step routine, with an unbelievably large timeout value,
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2282 // to drain the marking data structures of the remaining entries
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2283 // added by the 'keep alive' oop closure above.
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2284
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2285 class G1CMDrainMarkingStackClosure: public VoidClosure {
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2286 ConcurrentMark* _cm;
8014 f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2287 CMTask* _task;
8787 fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2288 bool _is_serial;
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2289 public:
8787 fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2290 G1CMDrainMarkingStackClosure(ConcurrentMark* cm, CMTask* task, bool is_serial) :
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2291 _cm(cm), _task(task), _is_serial(is_serial) {
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2292 assert(!_is_serial \|\| _task->worker_id() == 0, "only task 0 for serial code");
8014 f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2293 }
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2294
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2295 void do_void() {
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2296 do {
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	2297 if (_cm->verbose_high()) {
8787 fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2298 gclog_or_tty->print_cr("\t[%u] Drain: Calling do_marking_step - serial: %s",
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2299 _task->worker_id(), BOOL_TO_STR(_is_serial));
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	2300 }
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2301
8014 f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2302 // We call CMTask::do_marking_step() to completely drain the local
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2303 // and global marking stacks of entries pushed by the 'keep alive'
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2304 // oop closure (an instance of G1CMKeepAliveAndDrainClosure above).
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2305 //
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2306 // CMTask::do_marking_step() is called in a loop, which we'll exit
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2307 // if there's nothing more to do (i.e. we'completely drained the
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2308 // entries that were pushed as a a result of applying the 'keep alive'
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2309 // closure to the entries on the discovered ref lists) or we overflow
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2310 // the global marking stack.
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2311 //
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2312 // Note: CMTask::do_marking_step() can set the CMTask::has_aborted()
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2313 // flag while there may still be some work to do. (See the comment at
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2314 // the beginning of CMTask::do_marking_step() for those conditions -
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2315 // one of which is reaching the specified time target.) It is only
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2316 // when CMTask::do_marking_step() returns without setting the
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2317 // has_aborted() flag that the marking step has completed.
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2318
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2319 _task->do_marking_step(1000000000.0 /* something very large */,
8787 fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2320 true /* do_termination */,
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2321 _is_serial);
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2322 } while (_task->has_aborted() && !_cm->has_overflown());
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2323 }
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2324 };
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2325
3979 4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3977 diff changeset	2326 // Implementation of AbstractRefProcTaskExecutor for parallel
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3977 diff changeset	2327 // reference processing at the end of G1 concurrent marking
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3977 diff changeset	2328
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3977 diff changeset	2329 class G1CMRefProcTaskExecutor: public AbstractRefProcTaskExecutor {
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2330 private:
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2331 G1CollectedHeap* _g1h;
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2332 ConcurrentMark* _cm;
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2333 WorkGang* _workers;
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2334 int _active_workers;
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2335
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2336 public:
3979 4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3977 diff changeset	2337 G1CMRefProcTaskExecutor(G1CollectedHeap* g1h,
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2338 ConcurrentMark* cm,
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2339 WorkGang* workers,
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2340 int n_workers) :
4093 6071e0581859 7111795: G1: Various cleanups identified during walk through of changes for 6484965 johnc parents: 4072 diff changeset	2341 _g1h(g1h), _cm(cm),
6071e0581859 7111795: G1: Various cleanups identified during walk through of changes for 6484965 johnc parents: 4072 diff changeset	2342 _workers(workers), _active_workers(n_workers) { }
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2343
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2344 // Executes the given task using concurrent marking worker threads.
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2345 virtual void execute(ProcessTask& task);
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2346 virtual void execute(EnqueueTask& task);
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2347 };
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2348
3979 4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3977 diff changeset	2349 class G1CMRefProcTaskProxy: public AbstractGangTask {
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2350 typedef AbstractRefProcTaskExecutor::ProcessTask ProcessTask;
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2351 ProcessTask& _proc_task;
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2352 G1CollectedHeap* _g1h;
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2353 ConcurrentMark* _cm;
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2354
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2355 public:
3979 4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3977 diff changeset	2356 G1CMRefProcTaskProxy(ProcessTask& proc_task,
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2357 G1CollectedHeap* g1h,
4093 6071e0581859 7111795: G1: Various cleanups identified during walk through of changes for 6484965 johnc parents: 4072 diff changeset	2358 ConcurrentMark* cm) :
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2359 AbstractGangTask("Process reference objects in parallel"),
8014 f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2360 _proc_task(proc_task), _g1h(g1h), _cm(cm) {
8787 fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2361 ReferenceProcessor* rp = _g1h->ref_processor_cm();
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2362 assert(rp->processing_is_mt(), "shouldn't be here otherwise");
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2363 }
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2364
4728 441e946dc1af 7121618: Change type of number of GC workers to unsigned int. jmasa parents: 4711 diff changeset	2365 virtual void work(uint worker_id) {
8787 fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2366 CMTask* task = _cm->task(worker_id);
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2367 G1CMIsAliveClosure g1_is_alive(_g1h);
8787 fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2368 G1CMKeepAliveAndDrainClosure g1_par_keep_alive(_cm, task, false /* is_serial */);
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2369 G1CMDrainMarkingStackClosure g1_par_drain(_cm, task, false /* is_serial */);
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2370
4728 441e946dc1af 7121618: Change type of number of GC workers to unsigned int. jmasa parents: 4711 diff changeset	2371 _proc_task.work(worker_id, g1_is_alive, g1_par_keep_alive, g1_par_drain);
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2372 }
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2373 };
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2374
3979 4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3977 diff changeset	2375 void G1CMRefProcTaskExecutor::execute(ProcessTask& proc_task) {
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2376 assert(_workers != NULL, "Need parallel worker threads.");
8014 f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2377 assert(_g1h->ref_processor_cm()->processing_is_mt(), "processing is not MT");
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2378
4093 6071e0581859 7111795: G1: Various cleanups identified during walk through of changes for 6484965 johnc parents: 4072 diff changeset	2379 G1CMRefProcTaskProxy proc_task_proxy(proc_task, _g1h, _cm);
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2380
8788 e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	2381 // We need to reset the concurrency level before each
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	2382 // proxy task execution, so that the termination protocol
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	2383 // and overflow handling in CMTask::do_marking_step() knows
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	2384 // how many workers to wait for.
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	2385 _cm->set_concurrency(_active_workers);
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2386 _g1h->set_par_threads(_active_workers);
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2387 _workers->run_task(&proc_task_proxy);
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2388 _g1h->set_par_threads(0);
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2389 }
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2390
3979 4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3977 diff changeset	2391 class G1CMRefEnqueueTaskProxy: public AbstractGangTask {
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2392 typedef AbstractRefProcTaskExecutor::EnqueueTask EnqueueTask;
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2393 EnqueueTask& _enq_task;
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2394
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2395 public:
3979 4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3977 diff changeset	2396 G1CMRefEnqueueTaskProxy(EnqueueTask& enq_task) :
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2397 AbstractGangTask("Enqueue reference objects in parallel"),
4093 6071e0581859 7111795: G1: Various cleanups identified during walk through of changes for 6484965 johnc parents: 4072 diff changeset	2398 _enq_task(enq_task) { }
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2399
4728 441e946dc1af 7121618: Change type of number of GC workers to unsigned int. jmasa parents: 4711 diff changeset	2400 virtual void work(uint worker_id) {
441e946dc1af 7121618: Change type of number of GC workers to unsigned int. jmasa parents: 4711 diff changeset	2401 _enq_task.work(worker_id);
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2402 }
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2403 };
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2404
3979 4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3977 diff changeset	2405 void G1CMRefProcTaskExecutor::execute(EnqueueTask& enq_task) {
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2406 assert(_workers != NULL, "Need parallel worker threads.");
8014 f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2407 assert(_g1h->ref_processor_cm()->processing_is_mt(), "processing is not MT");
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2408
3979 4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3977 diff changeset	2409 G1CMRefEnqueueTaskProxy enq_task_proxy(enq_task);
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2410
8788 e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	2411 // Not strictly necessary but...
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	2412 //
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	2413 // We need to reset the concurrency level before each
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	2414 // proxy task execution, so that the termination protocol
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	2415 // and overflow handling in CMTask::do_marking_step() knows
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	2416 // how many workers to wait for.
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	2417 _cm->set_concurrency(_active_workers);
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2418 _g1h->set_par_threads(_active_workers);
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2419 _workers->run_task(&enq_task_proxy);
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2420 _g1h->set_par_threads(0);
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2421 }
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2422
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2423 void ConcurrentMark::weakRefsWork(bool clear_all_soft_refs) {
8788 e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	2424 if (has_overflown()) {
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	2425 // Skip processing the discovered references if we have
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	2426 // overflown the global marking stack. Reference objects
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	2427 // only get discovered once so it is OK to not
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	2428 // de-populate the discovered reference lists. We could have,
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	2429 // but the only benefit would be that, when marking restarts,
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	2430 // less reference objects are discovered.
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	2431 return;
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	2432 }
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	2433
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2434 ResourceMark rm;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2435 HandleMark hm;
3975 1847b501ae74 7068215: G1: Print reference processing time during remark johnc parents: 3914 diff changeset	2436
1847b501ae74 7068215: G1: Print reference processing time during remark johnc parents: 3914 diff changeset	2437 G1CollectedHeap* g1h = G1CollectedHeap::heap();
1847b501ae74 7068215: G1: Print reference processing time during remark johnc parents: 3914 diff changeset	2438
1847b501ae74 7068215: G1: Print reference processing time during remark johnc parents: 3914 diff changeset	2439 // Is alive closure.
1847b501ae74 7068215: G1: Print reference processing time during remark johnc parents: 3914 diff changeset	2440 G1CMIsAliveClosure g1_is_alive(g1h);
1847b501ae74 7068215: G1: Print reference processing time during remark johnc parents: 3914 diff changeset	2441
1847b501ae74 7068215: G1: Print reference processing time during remark johnc parents: 3914 diff changeset	2442 // Inner scope to exclude the cleaning of the string and symbol
1847b501ae74 7068215: G1: Print reference processing time during remark johnc parents: 3914 diff changeset	2443 // tables from the displayed time.
1847b501ae74 7068215: G1: Print reference processing time during remark johnc parents: 3914 diff changeset	2444 {
6007 5c86f8211d1e 7160728: Introduce an extra logging level for G1 logging brutisso parents: 5988 diff changeset	2445 if (G1Log::finer()) {
3975 1847b501ae74 7068215: G1: Print reference processing time during remark johnc parents: 3914 diff changeset	2446 gclog_or_tty->put(' ');
1847b501ae74 7068215: G1: Print reference processing time during remark johnc parents: 3914 diff changeset	2447 }
10405 f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10290 diff changeset	2448 GCTraceTime t("GC ref-proc", G1Log::finer(), false, g1h->gc_timer_cm());
3975 1847b501ae74 7068215: G1: Print reference processing time during remark johnc parents: 3914 diff changeset	2449
3979 4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3977 diff changeset	2450 ReferenceProcessor* rp = g1h->ref_processor_cm();
3975 1847b501ae74 7068215: G1: Print reference processing time during remark johnc parents: 3914 diff changeset	2451
1847b501ae74 7068215: G1: Print reference processing time during remark johnc parents: 3914 diff changeset	2452 // See the comment in G1CollectedHeap::ref_processing_init()
1847b501ae74 7068215: G1: Print reference processing time during remark johnc parents: 3914 diff changeset	2453 // about how reference processing currently works in G1.
1847b501ae74 7068215: G1: Print reference processing time during remark johnc parents: 3914 diff changeset	2454
8014 f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2455 // Set the soft reference policy
3975 1847b501ae74 7068215: G1: Print reference processing time during remark johnc parents: 3914 diff changeset	2456 rp->setup_policy(clear_all_soft_refs);
1847b501ae74 7068215: G1: Print reference processing time during remark johnc parents: 3914 diff changeset	2457 assert(_markStack.isEmpty(), "mark stack should be empty");
1847b501ae74 7068215: G1: Print reference processing time during remark johnc parents: 3914 diff changeset	2458
8787 fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2459 // Instances of the 'Keep Alive' and 'Complete GC' closures used
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2460 // in serial reference processing. Note these closures are also
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2461 // used for serially processing (by the the current thread) the
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2462 // JNI references during parallel reference processing.
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2463 //
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2464 // These closures do not need to synchronize with the worker
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2465 // threads involved in parallel reference processing as these
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2466 // instances are executed serially by the current thread (e.g.
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2467 // reference processing is not multi-threaded and is thus
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2468 // performed by the current thread instead of a gang worker).
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2469 //
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2470 // The gang tasks involved in parallel reference procssing create
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2471 // their own instances of these closures, which do their own
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2472 // synchronization among themselves.
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2473 G1CMKeepAliveAndDrainClosure g1_keep_alive(this, task(0), true /* is_serial */);
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2474 G1CMDrainMarkingStackClosure g1_drain_mark_stack(this, task(0), true /* is_serial */);
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2475
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2476 // We need at least one active thread. If reference processing
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2477 // is not multi-threaded we use the current (VMThread) thread,
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2478 // otherwise we use the work gang from the G1CollectedHeap and
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2479 // we utilize all the worker threads we can.
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2480 bool processing_is_mt = rp->processing_is_mt() && g1h->workers() != NULL;
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2481 uint active_workers = (processing_is_mt ? g1h->workers()->active_workers() : 1U);
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	2482 active_workers = MAX2(MIN2(active_workers, _max_worker_id), 1U);
3975 1847b501ae74 7068215: G1: Print reference processing time during remark johnc parents: 3914 diff changeset	2483
8787 fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2484 // Parallel processing task executor.
4093 6071e0581859 7111795: G1: Various cleanups identified during walk through of changes for 6484965 johnc parents: 4072 diff changeset	2485 G1CMRefProcTaskExecutor par_task_executor(g1h, this,
3979 4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3977 diff changeset	2486 g1h->workers(), active_workers);
8787 fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2487 AbstractRefProcTaskExecutor* executor = (processing_is_mt ? &par_task_executor : NULL);
8014 f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2488
8788 e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	2489 // Set the concurrency level. The phase was already set prior to
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	2490 // executing the remark task.
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	2491 set_concurrency(active_workers);
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	2492
8014 f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2493 // Set the degree of MT processing here. If the discovery was done MT,
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2494 // the number of threads involved during discovery could differ from
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2495 // the number of active workers. This is OK as long as the discovered
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2496 // Reference lists are balanced (see balance_all_queues() and balance_queues()).
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2497 rp->set_active_mt_degree(active_workers);
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2498
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2499 // Process the weak references.
10405 f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10290 diff changeset	2500 const ReferenceProcessorStats& stats =
f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10290 diff changeset	2501 rp->process_discovered_references(&g1_is_alive,
f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10290 diff changeset	2502 &g1_keep_alive,
f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10290 diff changeset	2503 &g1_drain_mark_stack,
f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10290 diff changeset	2504 executor,
f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10290 diff changeset	2505 g1h->gc_timer_cm());
f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10290 diff changeset	2506 g1h->gc_tracer_cm()->report_gc_reference_stats(stats);
8014 f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2507
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2508 // The do_oop work routines of the keep_alive and drain_marking_stack
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2509 // oop closures will set the has_overflown flag if we overflow the
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2510 // global marking stack.
3975 1847b501ae74 7068215: G1: Print reference processing time during remark johnc parents: 3914 diff changeset	2511
1847b501ae74 7068215: G1: Print reference processing time during remark johnc parents: 3914 diff changeset	2512 assert(_markStack.overflow() \|\| _markStack.isEmpty(),
1847b501ae74 7068215: G1: Print reference processing time during remark johnc parents: 3914 diff changeset	2513 "mark stack should be empty (unless it overflowed)");
8787 fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2514
3975 1847b501ae74 7068215: G1: Print reference processing time during remark johnc parents: 3914 diff changeset	2515 if (_markStack.overflow()) {
8014 f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2516 // This should have been done already when we tried to push an
3975 1847b501ae74 7068215: G1: Print reference processing time during remark johnc parents: 3914 diff changeset	2517 // entry on to the global mark stack. But let's do it again.
1847b501ae74 7068215: G1: Print reference processing time during remark johnc parents: 3914 diff changeset	2518 set_has_overflown();
1847b501ae74 7068215: G1: Print reference processing time during remark johnc parents: 3914 diff changeset	2519 }
1847b501ae74 7068215: G1: Print reference processing time during remark johnc parents: 3914 diff changeset	2520
8014 f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2521 assert(rp->num_q() == active_workers, "why not");
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2522
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2523 rp->enqueue_discovered_references(executor);
3975 1847b501ae74 7068215: G1: Print reference processing time during remark johnc parents: 3914 diff changeset	2524
1847b501ae74 7068215: G1: Print reference processing time during remark johnc parents: 3914 diff changeset	2525 rp->verify_no_references_recorded();
3979 4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3977 diff changeset	2526 assert(!rp->discovery_enabled(), "Post condition");
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2527 }
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2528
2177 3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 2175 diff changeset	2529 // Now clean up stale oops in StringTable
2037 b03260081e9b 7006113: G1: Initialize ReferenceProcessor::_is_alive_non_header field johnc parents: 1974 diff changeset	2530 StringTable::unlink(&g1_is_alive);
2177 3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 2175 diff changeset	2531 // Clean up unreferenced symbols in symbol table.
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 2175 diff changeset	2532 SymbolTable::unlink();
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2533 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2534
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2535 void ConcurrentMark::swapMarkBitMaps() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2536 CMBitMapRO* temp = _prevMarkBitMap;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2537 _prevMarkBitMap = (CMBitMapRO*)_nextMarkBitMap;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2538 _nextMarkBitMap = (CMBitMap*) temp;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2539 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2540
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2541 class CMRemarkTask: public AbstractGangTask {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2542 private:
8787 fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2543 ConcurrentMark* _cm;
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2544 bool _is_serial;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2545 public:
4728 441e946dc1af 7121618: Change type of number of GC workers to unsigned int. jmasa parents: 4711 diff changeset	2546 void work(uint worker_id) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2547 // Since all available tasks are actually started, we should
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2548 // only proceed if we're supposed to be actived.
4728 441e946dc1af 7121618: Change type of number of GC workers to unsigned int. jmasa parents: 4711 diff changeset	2549 if (worker_id < _cm->active_tasks()) {
441e946dc1af 7121618: Change type of number of GC workers to unsigned int. jmasa parents: 4711 diff changeset	2550 CMTask* task = _cm->task(worker_id);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2551 task->record_start_time();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2552 do {
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2553 task->do_marking_step(1000000000.0 /* something very large */,
8787 fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2554 true /* do_termination */,
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2555 _is_serial);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2556 } while (task->has_aborted() && !_cm->has_overflown());
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2557 // If we overflow, then we do not want to restart. We instead
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2558 // want to abort remark and do concurrent marking again.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2559 task->record_end_time();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2560 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2561 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2562
8787 fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2563 CMRemarkTask(ConcurrentMark* cm, int active_workers, bool is_serial) :
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2564 AbstractGangTask("Par Remark"), _cm(cm), _is_serial(is_serial) {
4711 adedfbbf0360 7120038: G1: ParallelGCThreads==0 is broken johnc parents: 4097 diff changeset	2565 _cm->terminator()->reset_for_reuse(active_workers);
4095 bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	2566 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2567 };
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2568
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2569 void ConcurrentMark::checkpointRootsFinalWork() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2570 ResourceMark rm;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2571 HandleMark hm;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2572 G1CollectedHeap* g1h = G1CollectedHeap::heap();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2573
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2574 g1h->ensure_parsability(false);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2575
1833 8b10f48633dc 6984287: Regularize how GC parallel workers are specified. jmasa parents: 1719 diff changeset	2576 if (G1CollectedHeap::use_parallel_gc_threads()) {
989 148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 912 diff changeset	2577 G1CollectedHeap::StrongRootsScope srs(g1h);
4095 bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	2578 // this is remark, so we'll use up all active threads
4728 441e946dc1af 7121618: Change type of number of GC workers to unsigned int. jmasa parents: 4711 diff changeset	2579 uint active_workers = g1h->workers()->active_workers();
4095 bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	2580 if (active_workers == 0) {
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	2581 assert(active_workers > 0, "Should have been set earlier");
4728 441e946dc1af 7121618: Change type of number of GC workers to unsigned int. jmasa parents: 4711 diff changeset	2582 active_workers = (uint) ParallelGCThreads;
4095 bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	2583 g1h->workers()->set_active_workers(active_workers);
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	2584 }
8788 e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	2585 set_concurrency_and_phase(active_workers, false /* concurrent */);
4095 bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	2586 // Leave _parallel_marking_threads at it's
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	2587 // value originally calculated in the ConcurrentMark
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	2588 // constructor and pass values of the active workers
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	2589 // through the gang in the task.
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2590
8787 fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2591 CMRemarkTask remarkTask(this, active_workers, false /* is_serial */);
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2592 // We will start all available threads, even if we decide that the
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2593 // active_workers will be fewer. The extra ones will just bail out
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2594 // immediately.
4095 bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	2595 g1h->set_par_threads(active_workers);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2596 g1h->workers()->run_task(&remarkTask);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2597 g1h->set_par_threads(0);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2598 } else {
989 148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 912 diff changeset	2599 G1CollectedHeap::StrongRootsScope srs(g1h);
4728 441e946dc1af 7121618: Change type of number of GC workers to unsigned int. jmasa parents: 4711 diff changeset	2600 uint active_workers = 1;
8788 e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	2601 set_concurrency_and_phase(active_workers, false /* concurrent */);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2602
8787 fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2603 // Note - if there's no work gang then the VMThread will be
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2604 // the thread to execute the remark - serially. We have
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2605 // to pass true for the is_serial parameter so that
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2606 // CMTask::do_marking_step() doesn't enter the sync
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2607 // barriers in the event of an overflow. Doing so will
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2608 // cause an assert that the current thread is not a
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2609 // concurrent GC thread.
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2610 CMRemarkTask remarkTask(this, active_workers, true /* is_serial*/);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2611 remarkTask.work(0);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2612 }
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	2613 SATBMarkQueueSet& satb_mq_set = JavaThread::satb_mark_queue_set();
8789 1179172e9ec9 8008301: G1: guarantee(satb_mq_set.completed_buffers_num() == 0) failure johnc parents: 8788 diff changeset	2614 guarantee(has_overflown() \|\|
1179172e9ec9 8008301: G1: guarantee(satb_mq_set.completed_buffers_num() == 0) failure johnc parents: 8788 diff changeset	2615 satb_mq_set.completed_buffers_num() == 0,
1179172e9ec9 8008301: G1: guarantee(satb_mq_set.completed_buffers_num() == 0) failure johnc parents: 8788 diff changeset	2616 err_msg("Invariant: has_overflown = %s, num buffers = %d",
1179172e9ec9 8008301: G1: guarantee(satb_mq_set.completed_buffers_num() == 0) failure johnc parents: 8788 diff changeset	2617 BOOL_TO_STR(has_overflown()),
1179172e9ec9 8008301: G1: guarantee(satb_mq_set.completed_buffers_num() == 0) failure johnc parents: 8788 diff changeset	2618 satb_mq_set.completed_buffers_num()));
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2619
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2620 print_stats();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2621 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2622
1044 6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	2623 #ifndef PRODUCT
6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	2624
1388 7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2625 class PrintReachableOopClosure: public OopClosure {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2626 private:
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2627 G1CollectedHeap* _g1h;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2628 outputStream* _out;
3772 6747fd0512e0 7004681: G1: Extend marking verification to Full GCs johnc parents: 3771 diff changeset	2629 VerifyOption _vo;
1388 7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2630 bool _all;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2631
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2632 public:
3772 6747fd0512e0 7004681: G1: Extend marking verification to Full GCs johnc parents: 3771 diff changeset	2633 PrintReachableOopClosure(outputStream* out,
6747fd0512e0 7004681: G1: Extend marking verification to Full GCs johnc parents: 3771 diff changeset	2634 VerifyOption vo,
1388 7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2635 bool all) :
1044 6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	2636 _g1h(G1CollectedHeap::heap()),
3772 6747fd0512e0 7004681: G1: Extend marking verification to Full GCs johnc parents: 3771 diff changeset	2637 _out(out), _vo(vo), _all(all) { }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2638
845 df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 831 diff changeset	2639 void do_oop(narrowOop* p) { do_oop_work(p); }
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 831 diff changeset	2640 void do_oop( oop* p) { do_oop_work(p); }
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 831 diff changeset	2641
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 831 diff changeset	2642 template <class T> void do_oop_work(T* p) {
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 831 diff changeset	2643 oop obj = oopDesc::load_decode_heap_oop(p);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2644 const char* str = NULL;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2645 const char* str2 = "";
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2646
1388 7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2647 if (obj == NULL) {
7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2648 str = "";
7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2649 } else if (!_g1h->is_in_g1_reserved(obj)) {
7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2650 str = " O";
7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2651 } else {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2652 HeapRegion* hr = _g1h->heap_region_containing(obj);
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	2653 guarantee(hr != NULL, "invariant");
6254 a2f7274eb6ef 7114678: G1: various small fixes, code cleanup, and refactoring tonyp parents: 6220 diff changeset	2654 bool over_tams = _g1h->allocated_since_marking(obj, hr, _vo);
a2f7274eb6ef 7114678: G1: various small fixes, code cleanup, and refactoring tonyp parents: 6220 diff changeset	2655 bool marked = _g1h->is_marked(obj, _vo);
1044 6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	2656
6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	2657 if (over_tams) {
1388 7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2658 str = " >";
7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2659 if (marked) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2660 str2 = " AND MARKED";
1044 6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	2661 }
1388 7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2662 } else if (marked) {
7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2663 str = " M";
1044 6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	2664 } else {
1388 7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2665 str = " NOT";
1044 6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	2666 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2667 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2668
1388 7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2669 _out->print_cr(" "PTR_FORMAT": "PTR_FORMAT"%s%s",
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2670 p, (void*) obj, str, str2);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2671 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2672 };
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2673
1388 7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2674 class PrintReachableObjectClosure : public ObjectClosure {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2675 private:
3772 6747fd0512e0 7004681: G1: Extend marking verification to Full GCs johnc parents: 3771 diff changeset	2676 G1CollectedHeap* _g1h;
6747fd0512e0 7004681: G1: Extend marking verification to Full GCs johnc parents: 3771 diff changeset	2677 outputStream* _out;
6747fd0512e0 7004681: G1: Extend marking verification to Full GCs johnc parents: 3771 diff changeset	2678 VerifyOption _vo;
6747fd0512e0 7004681: G1: Extend marking verification to Full GCs johnc parents: 3771 diff changeset	2679 bool _all;
6747fd0512e0 7004681: G1: Extend marking verification to Full GCs johnc parents: 3771 diff changeset	2680 HeapRegion* _hr;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2681
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2682 public:
3772 6747fd0512e0 7004681: G1: Extend marking verification to Full GCs johnc parents: 3771 diff changeset	2683 PrintReachableObjectClosure(outputStream* out,
6747fd0512e0 7004681: G1: Extend marking verification to Full GCs johnc parents: 3771 diff changeset	2684 VerifyOption vo,
1388 7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2685 bool all,
7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2686 HeapRegion* hr) :
3772 6747fd0512e0 7004681: G1: Extend marking verification to Full GCs johnc parents: 3771 diff changeset	2687 _g1h(G1CollectedHeap::heap()),
6747fd0512e0 7004681: G1: Extend marking verification to Full GCs johnc parents: 3771 diff changeset	2688 _out(out), _vo(vo), _all(all), _hr(hr) { }
1388 7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2689
7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2690 void do_object(oop o) {
6254 a2f7274eb6ef 7114678: G1: various small fixes, code cleanup, and refactoring tonyp parents: 6220 diff changeset	2691 bool over_tams = _g1h->allocated_since_marking(o, _hr, _vo);
a2f7274eb6ef 7114678: G1: various small fixes, code cleanup, and refactoring tonyp parents: 6220 diff changeset	2692 bool marked = _g1h->is_marked(o, _vo);
1388 7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2693 bool print_it = _all \|\| over_tams \|\| marked;
7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2694
7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2695 if (print_it) {
7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2696 _out->print_cr(" "PTR_FORMAT"%s",
7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2697 o, (over_tams) ? " >" : (marked) ? " M" : "");
3772 6747fd0512e0 7004681: G1: Extend marking verification to Full GCs johnc parents: 3771 diff changeset	2698 PrintReachableOopClosure oopCl(_out, _vo, _all);
6725 da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6254 diff changeset	2699 o->oop_iterate_no_header(&oopCl);
1388 7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2700 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2701 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2702 };
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2703
1388 7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2704 class PrintReachableRegionClosure : public HeapRegionClosure {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2705 private:
6254 a2f7274eb6ef 7114678: G1: various small fixes, code cleanup, and refactoring tonyp parents: 6220 diff changeset	2706 G1CollectedHeap* _g1h;
a2f7274eb6ef 7114678: G1: various small fixes, code cleanup, and refactoring tonyp parents: 6220 diff changeset	2707 outputStream* _out;
a2f7274eb6ef 7114678: G1: various small fixes, code cleanup, and refactoring tonyp parents: 6220 diff changeset	2708 VerifyOption _vo;
a2f7274eb6ef 7114678: G1: various small fixes, code cleanup, and refactoring tonyp parents: 6220 diff changeset	2709 bool _all;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2710
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2711 public:
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2712 bool doHeapRegion(HeapRegion* hr) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2713 HeapWord* b = hr->bottom();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2714 HeapWord* e = hr->end();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2715 HeapWord* t = hr->top();
6254 a2f7274eb6ef 7114678: G1: various small fixes, code cleanup, and refactoring tonyp parents: 6220 diff changeset	2716 HeapWord* p = _g1h->top_at_mark_start(hr, _vo);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2717 _out->print_cr("** ["PTR_FORMAT", "PTR_FORMAT"] top: "PTR_FORMAT" "
1044 6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	2718 "TAMS: "PTR_FORMAT, b, e, t, p);
1388 7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2719 _out->cr();
7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2720
7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2721 HeapWord* from = b;
7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2722 HeapWord* to = t;
7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2723
7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2724 if (to > from) {
7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2725 _out->print_cr("Objects in ["PTR_FORMAT", "PTR_FORMAT"]", from, to);
7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2726 _out->cr();
3772 6747fd0512e0 7004681: G1: Extend marking verification to Full GCs johnc parents: 3771 diff changeset	2727 PrintReachableObjectClosure ocl(_out, _vo, _all, hr);
1388 7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2728 hr->object_iterate_mem_careful(MemRegion(from, to), &ocl);
7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2729 _out->cr();
7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2730 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2731
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2732 return false;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2733 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2734
3772 6747fd0512e0 7004681: G1: Extend marking verification to Full GCs johnc parents: 3771 diff changeset	2735 PrintReachableRegionClosure(outputStream* out,
6747fd0512e0 7004681: G1: Extend marking verification to Full GCs johnc parents: 3771 diff changeset	2736 VerifyOption vo,
1388 7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2737 bool all) :
6254 a2f7274eb6ef 7114678: G1: various small fixes, code cleanup, and refactoring tonyp parents: 6220 diff changeset	2738 _g1h(G1CollectedHeap::heap()), _out(out), _vo(vo), _all(all) { }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2739 };
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2740
1388 7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2741 void ConcurrentMark::print_reachable(const char* str,
3772 6747fd0512e0 7004681: G1: Extend marking verification to Full GCs johnc parents: 3771 diff changeset	2742 VerifyOption vo,
1388 7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2743 bool all) {
7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2744 gclog_or_tty->cr();
7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2745 gclog_or_tty->print_cr("== Doing heap dump... ");
1044 6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	2746
6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	2747 if (G1PrintReachableBaseFile == NULL) {
6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	2748 gclog_or_tty->print_cr(" #### error: no base file defined");
6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	2749 return;
6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	2750 }
6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	2751
6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	2752 if (strlen(G1PrintReachableBaseFile) + 1 + strlen(str) >
6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	2753 (JVM_MAXPATHLEN - 1)) {
6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	2754 gclog_or_tty->print_cr(" #### error: file name too long");
6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	2755 return;
6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	2756 }
6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	2757
6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	2758 char file_name[JVM_MAXPATHLEN];
6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	2759 sprintf(file_name, "%s.%s", G1PrintReachableBaseFile, str);
6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	2760 gclog_or_tty->print_cr(" dumping to file %s", file_name);
6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	2761
6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	2762 fileStream fout(file_name);
6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	2763 if (!fout.is_open()) {
6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	2764 gclog_or_tty->print_cr(" #### error: could not open file");
6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	2765 return;
6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	2766 }
6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	2767
6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	2768 outputStream* out = &fout;
6254 a2f7274eb6ef 7114678: G1: various small fixes, code cleanup, and refactoring tonyp parents: 6220 diff changeset	2769 out->print_cr("-- USING %s", _g1h->top_at_mark_start_str(vo));
1044 6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	2770 out->cr();
6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	2771
1388 7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2772 out->print_cr("--- ITERATING OVER REGIONS");
1044 6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	2773 out->cr();
3772 6747fd0512e0 7004681: G1: Extend marking verification to Full GCs johnc parents: 3771 diff changeset	2774 PrintReachableRegionClosure rcl(out, vo, all);
1388 7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2775 _g1h->heap_region_iterate(&rcl);
1044 6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	2776 out->cr();
6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	2777
6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	2778 gclog_or_tty->print_cr(" done");
1388 7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2779 gclog_or_tty->flush();
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2780 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2781
1044 6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	2782 #endif // PRODUCT
6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	2783
4787 2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2784 void ConcurrentMark::clearRangePrevBitmap(MemRegion mr) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2785 // Note we are overriding the read-only view of the prev map here, via
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2786 // the cast.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2787 ((CMBitMap*)_prevMarkBitMap)->clearRange(mr);
4787 2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2788 }
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2789
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2790 void ConcurrentMark::clearRangeNextBitmap(MemRegion mr) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2791 _nextMarkBitMap->clearRange(mr);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2792 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2793
4787 2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2794 void ConcurrentMark::clearRangeBothBitmaps(MemRegion mr) {
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2795 clearRangePrevBitmap(mr);
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2796 clearRangeNextBitmap(mr);
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2797 }
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2798
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2799 HeapRegion*
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	2800 ConcurrentMark::claim_region(uint worker_id) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2801 // "checkpoint" the finger
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2802 HeapWord* finger = _finger;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2803
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2804 // _heap_end will not change underneath our feet; it only changes at
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2805 // yield points.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2806 while (finger < _heap_end) {
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	2807 assert(_g1h->is_in_g1_reserved(finger), "invariant");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2808
3771 842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	2809 // Note on how this code handles humongous regions. In the
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	2810 // normal case the finger will reach the start of a "starts
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	2811 // humongous" (SH) region. Its end will either be the end of the
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	2812 // last "continues humongous" (CH) region in the sequence, or the
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	2813 // standard end of the SH region (if the SH is the only region in
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	2814 // the sequence). That way claim_region() will skip over the CH
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	2815 // regions. However, there is a subtle race between a CM thread
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	2816 // executing this method and a mutator thread doing a humongous
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	2817 // object allocation. The two are not mutually exclusive as the CM
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	2818 // thread does not need to hold the Heap_lock when it gets
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	2819 // here. So there is a chance that claim_region() will come across
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	2820 // a free region that's in the progress of becoming a SH or a CH
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	2821 // region. In the former case, it will either
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	2822 // a) Miss the update to the region's end, in which case it will
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	2823 // visit every subsequent CH region, will find their bitmaps
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	2824 // empty, and do nothing, or
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	2825 // b) Will observe the update of the region's end (in which case
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	2826 // it will skip the subsequent CH regions).
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	2827 // If it comes across a region that suddenly becomes CH, the
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	2828 // scenario will be similar to b). So, the race between
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	2829 // claim_region() and a humongous object allocation might force us
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	2830 // to do a bit of unnecessary work (due to some unnecessary bitmap
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	2831 // iterations) but it should not introduce and correctness issues.
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	2832 HeapRegion* curr_region = _g1h->heap_region_containing_raw(finger);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2833 HeapWord* bottom = curr_region->bottom();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2834 HeapWord* end = curr_region->end();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2835 HeapWord* limit = curr_region->next_top_at_mark_start();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2836
3771 842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	2837 if (verbose_low()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	2838 gclog_or_tty->print_cr("[%u] curr_region = "PTR_FORMAT" "
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2839 "["PTR_FORMAT", "PTR_FORMAT"), "
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2840 "limit = "PTR_FORMAT,
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	2841 worker_id, curr_region, bottom, end, limit);
3771 842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	2842 }
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	2843
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	2844 // Is the gap between reading the finger and doing the CAS too long?
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	2845 HeapWord* res = (HeapWord*) Atomic::cmpxchg_ptr(end, &_finger, finger);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2846 if (res == finger) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2847 // we succeeded
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2848
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2849 // notice that _finger == end cannot be guaranteed here since,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2850 // someone else might have moved the finger even further
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	2851 assert(_finger >= end, "the finger should have moved forward");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2852
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	2853 if (verbose_low()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	2854 gclog_or_tty->print_cr("[%u] we were successful with region = "
8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	2855 PTR_FORMAT, worker_id, curr_region);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	2856 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2857
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2858 if (limit > bottom) {
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	2859 if (verbose_low()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	2860 gclog_or_tty->print_cr("[%u] region "PTR_FORMAT" is not empty, "
8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	2861 "returning it ", worker_id, curr_region);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	2862 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2863 return curr_region;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2864 } else {
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	2865 assert(limit == bottom,
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	2866 "the region limit should be at bottom");
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	2867 if (verbose_low()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	2868 gclog_or_tty->print_cr("[%u] region "PTR_FORMAT" is empty, "
8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	2869 "returning NULL", worker_id, curr_region);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	2870 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2871 // we return NULL and the caller should try calling
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2872 // claim_region() again.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2873 return NULL;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2874 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2875 } else {
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	2876 assert(_finger > finger, "the finger should have moved forward");
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	2877 if (verbose_low()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	2878 gclog_or_tty->print_cr("[%u] somebody else moved the finger, "
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2879 "global finger = "PTR_FORMAT", "
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2880 "our finger = "PTR_FORMAT,
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	2881 worker_id, _finger, finger);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	2882 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2883
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2884 // read it again
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2885 finger = _finger;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2886 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2887 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2888
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2889 return NULL;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2890 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2891
4787 2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2892 #ifndef PRODUCT
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2893 enum VerifyNoCSetOopsPhase {
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2894 VerifyNoCSetOopsStack,
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2895 VerifyNoCSetOopsQueues,
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2896 VerifyNoCSetOopsSATBCompleted,
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2897 VerifyNoCSetOopsSATBThread
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2898 };
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2899
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2900 class VerifyNoCSetOopsClosure : public OopClosure, public ObjectClosure {
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2901 private:
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2902 G1CollectedHeap* _g1h;
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2903 VerifyNoCSetOopsPhase _phase;
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2904 int _info;
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2905
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2906 const char* phase_str() {
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2907 switch (_phase) {
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2908 case VerifyNoCSetOopsStack: return "Stack";
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2909 case VerifyNoCSetOopsQueues: return "Queue";
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2910 case VerifyNoCSetOopsSATBCompleted: return "Completed SATB Buffers";
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2911 case VerifyNoCSetOopsSATBThread: return "Thread SATB Buffers";
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2912 default: ShouldNotReachHere();
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2913 }
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2914 return NULL;
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2915 }
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2916
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2917 void do_object_work(oop obj) {
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2918 guarantee(!_g1h->obj_in_cs(obj),
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2919 err_msg("obj: "PTR_FORMAT" in CSet, phase: %s, info: %d",
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2920 (void*) obj, phase_str(), _info));
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2921 }
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2922
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2923 public:
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2924 VerifyNoCSetOopsClosure() : _g1h(G1CollectedHeap::heap()) { }
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2925
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2926 void set_phase(VerifyNoCSetOopsPhase phase, int info = -1) {
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2927 _phase = phase;
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2928 _info = info;
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2929 }
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2930
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2931 virtual void do_oop(oop* p) {
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2932 oop obj = oopDesc::load_decode_heap_oop(p);
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2933 do_object_work(obj);
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2934 }
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2935
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2936 virtual void do_oop(narrowOop* p) {
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2937 // We should not come across narrow oops while scanning marking
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2938 // stacks and SATB buffers.
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2939 ShouldNotReachHere();
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2940 }
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2941
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2942 virtual void do_object(oop obj) {
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2943 do_object_work(obj);
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2944 }
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2945 };
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2946
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2947 void ConcurrentMark::verify_no_cset_oops(bool verify_stacks,
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2948 bool verify_enqueued_buffers,
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2949 bool verify_thread_buffers,
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2950 bool verify_fingers) {
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2951 assert(SafepointSynchronize::is_at_safepoint(), "should be at a safepoint");
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2952 if (!G1CollectedHeap::heap()->mark_in_progress()) {
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2953 return;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2954 }
1835 4805b9f4779e 6941395: G1: Use only lock-free versions of region stack push() and pop() johnc parents: 1833 diff changeset	2955
4787 2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2956 VerifyNoCSetOopsClosure cl;
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2957
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2958 if (verify_stacks) {
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2959 // Verify entries on the global mark stack
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2960 cl.set_phase(VerifyNoCSetOopsStack);
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2961 _markStack.oops_do(&cl);
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2962
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2963 // Verify entries on the task queues
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	2964 for (uint i = 0; i < _max_worker_id; i += 1) {
4787 2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2965 cl.set_phase(VerifyNoCSetOopsQueues, i);
7397 442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	2966 CMTaskQueue* queue = _task_queues->queue(i);
4787 2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2967 queue->oops_do(&cl);
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2968 }
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2969 }
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2970
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2971 SATBMarkQueueSet& satb_qs = JavaThread::satb_mark_queue_set();
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2972
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2973 // Verify entries on the enqueued SATB buffers
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2974 if (verify_enqueued_buffers) {
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2975 cl.set_phase(VerifyNoCSetOopsSATBCompleted);
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2976 satb_qs.iterate_completed_buffers_read_only(&cl);
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2977 }
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2978
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2979 // Verify entries on the per-thread SATB buffers
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2980 if (verify_thread_buffers) {
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2981 cl.set_phase(VerifyNoCSetOopsSATBThread);
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2982 satb_qs.iterate_thread_buffers_read_only(&cl);
1835 4805b9f4779e 6941395: G1: Use only lock-free versions of region stack push() and pop() johnc parents: 1833 diff changeset	2983 }
4805b9f4779e 6941395: G1: Use only lock-free versions of region stack push() and pop() johnc parents: 1833 diff changeset	2984
4787 2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2985 if (verify_fingers) {
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2986 // Verify the global finger
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2987 HeapWord* global_finger = finger();
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2988 if (global_finger != NULL && global_finger < _heap_end) {
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2989 // The global finger always points to a heap region boundary. We
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2990 // use heap_region_containing_raw() to get the containing region
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2991 // given that the global finger could be pointing to a free region
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2992 // which subsequently becomes continues humongous. If that
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2993 // happens, heap_region_containing() will return the bottom of the
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2994 // corresponding starts humongous region and the check below will
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2995 // not hold any more.
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2996 HeapRegion* global_hr = _g1h->heap_region_containing_raw(global_finger);
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2997 guarantee(global_finger == global_hr->bottom(),
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2998 err_msg("global finger: "PTR_FORMAT" region: "HR_FORMAT,
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2999 global_finger, HR_FORMAT_PARAMS(global_hr)));
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	3000 }
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	3001
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	3002 // Verify the task fingers
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3003 assert(parallel_marking_threads() <= _max_worker_id, "sanity");
4787 2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	3004 for (int i = 0; i < (int) parallel_marking_threads(); i += 1) {
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	3005 CMTask* task = _tasks[i];
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	3006 HeapWord* task_finger = task->finger();
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	3007 if (task_finger != NULL && task_finger < _heap_end) {
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	3008 // See above note on the global finger verification.
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	3009 HeapRegion* task_hr = _g1h->heap_region_containing_raw(task_finger);
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	3010 guarantee(task_finger == task_hr->bottom() \|\|
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	3011 !task_hr->in_collection_set(),
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	3012 err_msg("task finger: "PTR_FORMAT" region: "HR_FORMAT,
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	3013 task_finger, HR_FORMAT_PARAMS(task_hr)));
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	3014 }
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	3015 }
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	3016 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3017 }
4787 2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	3018 #endif // PRODUCT
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3019
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3020 // Aggregate the counting data that was constructed concurrently
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3021 // with marking.
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3022 class AggregateCountDataHRClosure: public HeapRegionClosure {
6812 988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	3023 G1CollectedHeap* _g1h;
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3024 ConcurrentMark* _cm;
6812 988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	3025 CardTableModRefBS* _ct_bs;
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3026 BitMap* _cm_card_bm;
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3027 uint _max_worker_id;
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3028
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3029 public:
6812 988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	3030 AggregateCountDataHRClosure(G1CollectedHeap* g1h,
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3031 BitMap* cm_card_bm,
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3032 uint max_worker_id) :
6812 988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	3033 _g1h(g1h), _cm(g1h->concurrent_mark()),
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	3034 _ct_bs((CardTableModRefBS*) (g1h->barrier_set())),
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3035 _cm_card_bm(cm_card_bm), _max_worker_id(max_worker_id) { }
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3036
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3037 bool doHeapRegion(HeapRegion* hr) {
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3038 if (hr->continuesHumongous()) {
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3039 // We will ignore these here and process them when their
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3040 // associated "starts humongous" region is processed.
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3041 // Note that we cannot rely on their associated
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3042 // "starts humongous" region to have their bit set to 1
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3043 // since, due to the region chunking in the parallel region
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3044 // iteration, a "continues humongous" region might be visited
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3045 // before its associated "starts humongous".
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3046 return false;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3047 }
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3048
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3049 HeapWord* start = hr->bottom();
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3050 HeapWord* limit = hr->next_top_at_mark_start();
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3051 HeapWord* end = hr->end();
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3052
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3053 assert(start <= limit && limit <= hr->top() && hr->top() <= hr->end(),
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3054 err_msg("Preconditions not met - "
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3055 "start: "PTR_FORMAT", limit: "PTR_FORMAT", "
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3056 "top: "PTR_FORMAT", end: "PTR_FORMAT,
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3057 start, limit, hr->top(), hr->end()));
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3058
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3059 assert(hr->next_marked_bytes() == 0, "Precondition");
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3060
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3061 if (start == limit) {
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3062 // NTAMS of this region has not been set so nothing to do.
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3063 return false;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3064 }
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3065
6812 988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	3066 // 'start' should be in the heap.
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	3067 assert(_g1h->is_in_g1_reserved(start) && _ct_bs->is_card_aligned(start), "sanity");
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	3068 // 'end' may be just beyone the end of the heap (if hr is the last region)
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	3069 assert(!_g1h->is_in_g1_reserved(end) \|\| _ct_bs->is_card_aligned(end), "sanity");
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3070
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3071 BitMap::idx_t start_idx = _cm->card_bitmap_index_for(start);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3072 BitMap::idx_t limit_idx = _cm->card_bitmap_index_for(limit);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3073 BitMap::idx_t end_idx = _cm->card_bitmap_index_for(end);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3074
6812 988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	3075 // If ntams is not card aligned then we bump card bitmap index
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	3076 // for limit so that we get the all the cards spanned by
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	3077 // the object ending at ntams.
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	3078 // Note: if this is the last region in the heap then ntams
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	3079 // could be actually just beyond the end of the the heap;
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	3080 // limit_idx will then correspond to a (non-existent) card
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	3081 // that is also outside the heap.
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	3082 if (_g1h->is_in_g1_reserved(limit) && !_ct_bs->is_card_aligned(limit)) {
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3083 limit_idx += 1;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3084 }
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3085
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3086 assert(limit_idx <= end_idx, "or else use atomics");
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3087
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3088 // Aggregate the "stripe" in the count data associated with hr.
6010 720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 6008 diff changeset	3089 uint hrs_index = hr->hrs_index();
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3090 size_t marked_bytes = 0;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3091
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3092 for (uint i = 0; i < _max_worker_id; i += 1) {
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3093 size_t* marked_bytes_array = _cm->count_marked_bytes_array_for(i);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3094 BitMap* task_card_bm = _cm->count_card_bitmap_for(i);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3095
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3096 // Fetch the marked_bytes in this region for task i and
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3097 // add it to the running total for this region.
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3098 marked_bytes += marked_bytes_array[hrs_index];
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3099
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3100 // Now union the bitmaps[0,max_worker_id)[start_idx..limit_idx)
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3101 // into the global card bitmap.
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3102 BitMap::idx_t scan_idx = task_card_bm->get_next_one_offset(start_idx, limit_idx);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3103
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3104 while (scan_idx < limit_idx) {
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3105 assert(task_card_bm->at(scan_idx) == true, "should be");
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3106 _cm_card_bm->set_bit(scan_idx);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3107 assert(_cm_card_bm->at(scan_idx) == true, "should be");
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3108
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3109 // BitMap::get_next_one_offset() can handle the case when
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3110 // its left_offset parameter is greater than its right_offset
6812 988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	3111 // parameter. It does, however, have an early exit if
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3112 // left_offset == right_offset. So let's limit the value
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3113 // passed in for left offset here.
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3114 BitMap::idx_t next_idx = MIN2(scan_idx + 1, limit_idx);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3115 scan_idx = task_card_bm->get_next_one_offset(next_idx, limit_idx);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3116 }
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3117 }
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3118
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3119 // Update the marked bytes for this region.
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3120 hr->add_to_marked_bytes(marked_bytes);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3121
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3122 // Next heap region
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3123 return false;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3124 }
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3125 };
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3126
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3127 class G1AggregateCountDataTask: public AbstractGangTask {
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3128 protected:
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3129 G1CollectedHeap* _g1h;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3130 ConcurrentMark* _cm;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3131 BitMap* _cm_card_bm;
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3132 uint _max_worker_id;
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3133 int _active_workers;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3134
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3135 public:
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3136 G1AggregateCountDataTask(G1CollectedHeap* g1h,
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3137 ConcurrentMark* cm,
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3138 BitMap* cm_card_bm,
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3139 uint max_worker_id,
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3140 int n_workers) :
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3141 AbstractGangTask("Count Aggregation"),
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3142 _g1h(g1h), _cm(cm), _cm_card_bm(cm_card_bm),
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3143 _max_worker_id(max_worker_id),
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3144 _active_workers(n_workers) { }
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3145
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3146 void work(uint worker_id) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3147 AggregateCountDataHRClosure cl(_g1h, _cm_card_bm, _max_worker_id);
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3148
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3149 if (G1CollectedHeap::use_parallel_gc_threads()) {
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3150 _g1h->heap_region_par_iterate_chunked(&cl, worker_id,
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3151 _active_workers,
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3152 HeapRegion::AggregateCountClaimValue);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3153 } else {
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3154 _g1h->heap_region_iterate(&cl);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3155 }
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3156 }
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3157 };
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3158
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3159
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3160 void ConcurrentMark::aggregate_count_data() {
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3161 int n_workers = (G1CollectedHeap::use_parallel_gc_threads() ?
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3162 _g1h->workers()->active_workers() :
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3163 1);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3164
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3165 G1AggregateCountDataTask g1_par_agg_task(_g1h, this, &_card_bm,
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3166 _max_worker_id, n_workers);
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3167
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3168 if (G1CollectedHeap::use_parallel_gc_threads()) {
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3169 assert(_g1h->check_heap_region_claim_values(HeapRegion::InitialClaimValue),
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3170 "sanity check");
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3171 _g1h->set_par_threads(n_workers);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3172 _g1h->workers()->run_task(&g1_par_agg_task);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3173 _g1h->set_par_threads(0);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3174
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3175 assert(_g1h->check_heap_region_claim_values(HeapRegion::AggregateCountClaimValue),
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3176 "sanity check");
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3177 _g1h->reset_heap_region_claim_values();
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3178 } else {
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3179 g1_par_agg_task.work(0);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3180 }
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3181 }
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3182
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3183 // Clear the per-worker arrays used to store the per-region counting data
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3184 void ConcurrentMark::clear_all_count_data() {
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3185 // Clear the global card bitmap - it will be filled during
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3186 // liveness count aggregation (during remark) and the
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3187 // final counting task.
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3188 _card_bm.clear();
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3189
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3190 // Clear the global region bitmap - it will be filled as part
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3191 // of the final counting task.
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3192 _region_bm.clear();
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3193
6010 720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 6008 diff changeset	3194 uint max_regions = _g1h->max_regions();
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3195 assert(_max_worker_id > 0, "uninitialized");
8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3196
8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3197 for (uint i = 0; i < _max_worker_id; i += 1) {
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3198 BitMap* task_card_bm = count_card_bitmap_for(i);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3199 size_t* marked_bytes_array = count_marked_bytes_array_for(i);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3200
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3201 assert(task_card_bm->size() == _card_bm.size(), "size mismatch");
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3202 assert(marked_bytes_array != NULL, "uninitialized");
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3203
6010 720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 6008 diff changeset	3204 memset(marked_bytes_array, 0, (size_t) max_regions * sizeof(size_t));
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3205 task_card_bm->clear();
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3206 }
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3207 }
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3208
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3209 void ConcurrentMark::print_stats() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3210 if (verbose_stats()) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3211 gclog_or_tty->print_cr("---------------------------------------------------------------------");
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3212 for (size_t i = 0; i < _active_tasks; ++i) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3213 _tasks[i]->print_stats();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3214 gclog_or_tty->print_cr("---------------------------------------------------------------------");
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3215 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3216 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3217 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3218
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3219 // abandon current marking iteration due to a Full GC
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3220 void ConcurrentMark::abort() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3221 // Clear all marks to force marking thread to do nothing
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3222 _nextMarkBitMap->clearAll();
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3223 // Clear the liveness counting data
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3224 clear_all_count_data();
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3225 // Empty mark stack
7450 d275c3dc73e6 8004816: G1: Kitchensink failures after marking stack changes johnc parents: 7397 diff changeset	3226 reset_marking_state();
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3227 for (uint i = 0; i < _max_worker_id; ++i) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3228 _tasks[i]->clear_region_fields();
1835 4805b9f4779e 6941395: G1: Use only lock-free versions of region stack push() and pop() johnc parents: 1833 diff changeset	3229 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3230 _has_aborted = true;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3231
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3232 SATBMarkQueueSet& satb_mq_set = JavaThread::satb_mark_queue_set();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3233 satb_mq_set.abandon_partial_marking();
1317 d4197f8d516a 6935821: G1: threads created during marking do not active their SATB queues tonyp parents: 1314 diff changeset	3234 // This can be called either during or outside marking, we'll read
d4197f8d516a 6935821: G1: threads created during marking do not active their SATB queues tonyp parents: 1314 diff changeset	3235 // the expected_active value from the SATB queue set.
d4197f8d516a 6935821: G1: threads created during marking do not active their SATB queues tonyp parents: 1314 diff changeset	3236 satb_mq_set.set_active_all_threads(
d4197f8d516a 6935821: G1: threads created during marking do not active their SATB queues tonyp parents: 1314 diff changeset	3237 false, /* new active value */
d4197f8d516a 6935821: G1: threads created during marking do not active their SATB queues tonyp parents: 1314 diff changeset	3238 satb_mq_set.is_active() /* expected_active */);
10405 f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10290 diff changeset	3239
f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10290 diff changeset	3240 _g1h->trace_heap_after_concurrent_cycle();
f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10290 diff changeset	3241 _g1h->register_concurrent_cycle_end();
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3242 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3243
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3244 static void print_ms_time_info(const char* prefix, const char* name,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3245 NumberSeq& ns) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3246 gclog_or_tty->print_cr("%s%5d %12s: total time = %8.2f s (avg = %8.2f ms).",
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3247 prefix, ns.num(), name, ns.sum()/1000.0, ns.avg());
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3248 if (ns.num() > 0) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3249 gclog_or_tty->print_cr("%s [std. dev = %8.2f ms, max = %8.2f ms]",
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3250 prefix, ns.sd(), ns.maximum());
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3251 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3252 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3253
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3254 void ConcurrentMark::print_summary_info() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3255 gclog_or_tty->print_cr(" Concurrent marking:");
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3256 print_ms_time_info(" ", "init marks", _init_times);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3257 print_ms_time_info(" ", "remarks", _remark_times);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3258 {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3259 print_ms_time_info(" ", "final marks", _remark_mark_times);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3260 print_ms_time_info(" ", "weak refs", _remark_weak_ref_times);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3261
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3262 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3263 print_ms_time_info(" ", "cleanups", _cleanup_times);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3264 gclog_or_tty->print_cr(" Final counting total time = %8.2f s (avg = %8.2f ms).",
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3265 _total_counting_time,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3266 (_cleanup_times.num() > 0 ? _total_counting_time * 1000.0 /
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3267 (double)_cleanup_times.num()
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3268 : 0.0));
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3269 if (G1ScrubRemSets) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3270 gclog_or_tty->print_cr(" RS scrub total time = %8.2f s (avg = %8.2f ms).",
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3271 _total_rs_scrub_time,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3272 (_cleanup_times.num() > 0 ? _total_rs_scrub_time * 1000.0 /
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3273 (double)_cleanup_times.num()
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3274 : 0.0));
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3275 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3276 gclog_or_tty->print_cr(" Total stop_world time = %8.2f s.",
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3277 (_init_times.sum() + _remark_times.sum() +
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3278 _cleanup_times.sum())/1000.0);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3279 gclog_or_tty->print_cr(" Total concurrent time = %8.2f s "
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3280 "(%8.2f s marking).",
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3281 cmThread()->vtime_accum(),
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3282 cmThread()->vtime_mark_accum());
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3283 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3284
1019 035d2e036a9b 6885041: G1: inconsistent thread dump tonyp parents: 993 diff changeset	3285 void ConcurrentMark::print_worker_threads_on(outputStream* st) const {
8008 256d3f43c177 8005875: G1: Kitchensink fails with ParallelGCThreads=0 johnc parents: 8006 diff changeset	3286 if (use_parallel_marking_threads()) {
256d3f43c177 8005875: G1: Kitchensink fails with ParallelGCThreads=0 johnc parents: 8006 diff changeset	3287 _parallel_workers->print_worker_threads_on(st);
256d3f43c177 8005875: G1: Kitchensink fails with ParallelGCThreads=0 johnc parents: 8006 diff changeset	3288 }
1019 035d2e036a9b 6885041: G1: inconsistent thread dump tonyp parents: 993 diff changeset	3289 }
035d2e036a9b 6885041: G1: inconsistent thread dump tonyp parents: 993 diff changeset	3290
9076 7b835924c31c 8011872: Include Bit Map addresses in the hs_err files stefank parents: 8789 diff changeset	3291 void ConcurrentMark::print_on_error(outputStream* st) const {
7b835924c31c 8011872: Include Bit Map addresses in the hs_err files stefank parents: 8789 diff changeset	3292 st->print_cr("Marking Bits (Prev, Next): (CMBitMap) " PTR_FORMAT ", (CMBitMap) " PTR_FORMAT,
7b835924c31c 8011872: Include Bit Map addresses in the hs_err files stefank parents: 8789 diff changeset	3293 _prevMarkBitMap, _nextMarkBitMap);
7b835924c31c 8011872: Include Bit Map addresses in the hs_err files stefank parents: 8789 diff changeset	3294 _prevMarkBitMap->print_on_error(st, " Prev Bits: ");
7b835924c31c 8011872: Include Bit Map addresses in the hs_err files stefank parents: 8789 diff changeset	3295 _nextMarkBitMap->print_on_error(st, " Next Bits: ");
7b835924c31c 8011872: Include Bit Map addresses in the hs_err files stefank parents: 8789 diff changeset	3296 }
7b835924c31c 8011872: Include Bit Map addresses in the hs_err files stefank parents: 8789 diff changeset	3297
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3298 // We take a break if someone is trying to stop the world.
4728 441e946dc1af 7121618: Change type of number of GC workers to unsigned int. jmasa parents: 4711 diff changeset	3299 bool ConcurrentMark::do_yield_check(uint worker_id) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3300 if (should_yield()) {
4728 441e946dc1af 7121618: Change type of number of GC workers to unsigned int. jmasa parents: 4711 diff changeset	3301 if (worker_id == 0) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3302 _g1h->g1_policy()->record_concurrent_pause();
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3303 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3304 cmThread()->yield();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3305 return true;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3306 } else {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3307 return false;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3308 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3309 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3310
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3311 bool ConcurrentMark::should_yield() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3312 return cmThread()->should_yield();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3313 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3314
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3315 bool ConcurrentMark::containing_card_is_marked(void* p) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3316 size_t offset = pointer_delta(p, _g1h->reserved_region().start(), 1);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3317 return _card_bm.at(offset >> CardTableModRefBS::card_shift);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3318 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3319
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3320 bool ConcurrentMark::containing_cards_are_marked(void* start,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3321 void* last) {
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3322 return containing_card_is_marked(start) &&
23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3323 containing_card_is_marked(last);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3324 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3325
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3326 #ifndef PRODUCT
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3327 // for debugging purposes
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3328 void ConcurrentMark::print_finger() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3329 gclog_or_tty->print_cr("heap ["PTR_FORMAT", "PTR_FORMAT"), global finger = "PTR_FORMAT,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3330 _heap_start, _heap_end, _finger);
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3331 for (uint i = 0; i < _max_worker_id; ++i) {
8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3332 gclog_or_tty->print(" %u: "PTR_FORMAT, i, _tasks[i]->finger());
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3333 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3334 gclog_or_tty->print_cr("");
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3335 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3336 #endif
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3337
3771 842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	3338 void CMTask::scan_object(oop obj) {
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	3339 assert(_nextMarkBitMap->isMarked((HeapWord*) obj), "invariant");
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	3340
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	3341 if (_cm->verbose_high()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3342 gclog_or_tty->print_cr("[%u] we're scanning object "PTR_FORMAT,
8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3343 _worker_id, (void*) obj);
3771 842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	3344 }
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	3345
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	3346 size_t obj_size = obj->size();
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	3347 _words_scanned += obj_size;
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	3348
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	3349 obj->oop_iterate(_cm_oop_closure);
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	3350 statsOnly( ++_objs_scanned );
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	3351 check_limits();
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	3352 }
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	3353
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3354 // Closure for iteration over bitmaps
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3355 class CMBitMapClosure : public BitMapClosure {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3356 private:
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3357 // the bitmap that is being iterated over
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3358 CMBitMap* _nextMarkBitMap;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3359 ConcurrentMark* _cm;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3360 CMTask* _task;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3361
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3362 public:
5988 2a0172480595 7127697: G1: remove dead code after recent concurrent mark changes tonyp parents: 4837 diff changeset	3363 CMBitMapClosure(CMTask task, ConcurrentMark cm, CMBitMap* nextMarkBitMap) :
2a0172480595 7127697: G1: remove dead code after recent concurrent mark changes tonyp parents: 4837 diff changeset	3364 _task(task), _cm(cm), _nextMarkBitMap(nextMarkBitMap) { }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3365
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3366 bool do_bit(size_t offset) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3367 HeapWord* addr = _nextMarkBitMap->offsetToHeapWord(offset);
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	3368 assert(_nextMarkBitMap->isMarked(addr), "invariant");
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	3369 assert( addr < _cm->finger(), "invariant");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3370
5988 2a0172480595 7127697: G1: remove dead code after recent concurrent mark changes tonyp parents: 4837 diff changeset	3371 statsOnly( _task->increase_objs_found_on_bitmap() );
2a0172480595 7127697: G1: remove dead code after recent concurrent mark changes tonyp parents: 4837 diff changeset	3372 assert(addr >= _task->finger(), "invariant");
2a0172480595 7127697: G1: remove dead code after recent concurrent mark changes tonyp parents: 4837 diff changeset	3373
2a0172480595 7127697: G1: remove dead code after recent concurrent mark changes tonyp parents: 4837 diff changeset	3374 // We move that task's local finger along.
2a0172480595 7127697: G1: remove dead code after recent concurrent mark changes tonyp parents: 4837 diff changeset	3375 _task->move_finger_to(addr);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3376
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3377 _task->scan_object(oop(addr));
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3378 // we only partially drain the local queue and global stack
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3379 _task->drain_local_queue(true);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3380 _task->drain_global_stack(true);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3381
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3382 // if the has_aborted flag has been raised, we need to bail out of
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3383 // the iteration
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3384 return !_task->has_aborted();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3385 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3386 };
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3387
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3388 // Closure for iterating over objects, currently only used for
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3389 // processing SATB buffers.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3390 class CMObjectClosure : public ObjectClosure {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3391 private:
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3392 CMTask* _task;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3393
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3394 public:
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3395 void do_object(oop obj) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3396 _task->deal_with_reference(obj);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3397 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3398
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3399 CMObjectClosure(CMTask* task) : _task(task) { }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3400 };
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3401
3771 842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	3402 G1CMOopClosure::G1CMOopClosure(G1CollectedHeap* g1h,
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	3403 ConcurrentMark* cm,
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	3404 CMTask* task)
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	3405 : _g1h(g1h), _cm(cm), _task(task) {
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	3406 assert(_ref_processor == NULL, "should be initialized to NULL");
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	3407
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	3408 if (G1UseConcMarkReferenceProcessing) {
3979 4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3977 diff changeset	3409 _ref_processor = g1h->ref_processor_cm();
3771 842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	3410 assert(_ref_processor != NULL, "should not be NULL");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3411 }
3771 842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	3412 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3413
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3414 void CMTask::setup_for_region(HeapRegion* hr) {
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	3415 // Separated the asserts so that we know which one fires.
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	3416 assert(hr != NULL,
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	3417 "claim_region() should have filtered out continues humongous regions");
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	3418 assert(!hr->continuesHumongous(),
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	3419 "claim_region() should have filtered out continues humongous regions");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3420
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3421 if (_cm->verbose_low()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3422 gclog_or_tty->print_cr("[%u] setting up for region "PTR_FORMAT,
8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3423 _worker_id, hr);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3424 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3425
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3426 _curr_region = hr;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3427 _finger = hr->bottom();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3428 update_region_limit();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3429 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3430
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3431 void CMTask::update_region_limit() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3432 HeapRegion* hr = _curr_region;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3433 HeapWord* bottom = hr->bottom();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3434 HeapWord* limit = hr->next_top_at_mark_start();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3435
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3436 if (limit == bottom) {
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3437 if (_cm->verbose_low()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3438 gclog_or_tty->print_cr("[%u] found an empty region "
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3439 "["PTR_FORMAT", "PTR_FORMAT")",
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3440 _worker_id, bottom, limit);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3441 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3442 // The region was collected underneath our feet.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3443 // We set the finger to bottom to ensure that the bitmap
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3444 // iteration that will follow this will not do anything.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3445 // (this is not a condition that holds when we set the region up,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3446 // as the region is not supposed to be empty in the first place)
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3447 _finger = bottom;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3448 } else if (limit >= _region_limit) {
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	3449 assert(limit >= _finger, "peace of mind");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3450 } else {
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	3451 assert(limit < _region_limit, "only way to get here");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3452 // This can happen under some pretty unusual circumstances. An
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3453 // evacuation pause empties the region underneath our feet (NTAMS
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3454 // at bottom). We then do some allocation in the region (NTAMS
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3455 // stays at bottom), followed by the region being used as a GC
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3456 // alloc region (NTAMS will move to top() and the objects
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3457 // originally below it will be grayed). All objects now marked in
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3458 // the region are explicitly grayed, if below the global finger,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3459 // and we do not need in fact to scan anything else. So, we simply
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3460 // set _finger to be limit to ensure that the bitmap iteration
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3461 // doesn't do anything.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3462 _finger = limit;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3463 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3464
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3465 _region_limit = limit;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3466 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3467
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3468 void CMTask::giveup_current_region() {
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	3469 assert(_curr_region != NULL, "invariant");
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3470 if (_cm->verbose_low()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3471 gclog_or_tty->print_cr("[%u] giving up region "PTR_FORMAT,
8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3472 _worker_id, _curr_region);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3473 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3474 clear_region_fields();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3475 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3476
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3477 void CMTask::clear_region_fields() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3478 // Values for these three fields that indicate that we're not
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3479 // holding on to a region.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3480 _curr_region = NULL;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3481 _finger = NULL;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3482 _region_limit = NULL;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3483 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3484
3771 842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	3485 void CMTask::set_cm_oop_closure(G1CMOopClosure* cm_oop_closure) {
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	3486 if (cm_oop_closure == NULL) {
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	3487 assert(_cm_oop_closure != NULL, "invariant");
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	3488 } else {
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	3489 assert(_cm_oop_closure == NULL, "invariant");
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	3490 }
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	3491 _cm_oop_closure = cm_oop_closure;
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	3492 }
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	3493
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3494 void CMTask::reset(CMBitMap* nextMarkBitMap) {
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	3495 guarantee(nextMarkBitMap != NULL, "invariant");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3496
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3497 if (_cm->verbose_low()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3498 gclog_or_tty->print_cr("[%u] resetting", _worker_id);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3499 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3500
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3501 _nextMarkBitMap = nextMarkBitMap;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3502 clear_region_fields();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3503
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3504 _calls = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3505 _elapsed_time_ms = 0.0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3506 _termination_time_ms = 0.0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3507 _termination_start_time_ms = 0.0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3508
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3509 #if _MARKING_STATS_
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3510 _local_pushes = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3511 _local_pops = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3512 _local_max_size = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3513 _objs_scanned = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3514 _global_pushes = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3515 _global_pops = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3516 _global_max_size = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3517 _global_transfers_to = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3518 _global_transfers_from = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3519 _regions_claimed = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3520 _objs_found_on_bitmap = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3521 _satb_buffers_processed = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3522 _steal_attempts = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3523 _steals = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3524 _aborted = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3525 _aborted_overflow = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3526 _aborted_cm_aborted = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3527 _aborted_yield = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3528 _aborted_timed_out = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3529 _aborted_satb = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3530 _aborted_termination = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3531 #endif // _MARKING_STATS_
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3532 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3533
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3534 bool CMTask::should_exit_termination() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3535 regular_clock_call();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3536 // This is called when we are in the termination protocol. We should
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3537 // quit if, for some reason, this task wants to abort or the global
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3538 // stack is not empty (this means that we can get work from it).
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3539 return !_cm->mark_stack_empty() \|\| has_aborted();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3540 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3541
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3542 void CMTask::reached_limit() {
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	3543 assert(_words_scanned >= _words_scanned_limit \|\|
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	3544 _refs_reached >= _refs_reached_limit ,
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	3545 "shouldn't have been called otherwise");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3546 regular_clock_call();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3547 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3548
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3549 void CMTask::regular_clock_call() {
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3550 if (has_aborted()) return;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3551
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3552 // First, we need to recalculate the words scanned and refs reached
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3553 // limits for the next clock call.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3554 recalculate_limits();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3555
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3556 // During the regular clock call we do the following
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3557
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3558 // (1) If an overflow has been flagged, then we abort.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3559 if (_cm->has_overflown()) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3560 set_has_aborted();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3561 return;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3562 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3563
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3564 // If we are not concurrent (i.e. we're doing remark) we don't need
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3565 // to check anything else. The other steps are only needed during
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3566 // the concurrent marking phase.
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3567 if (!concurrent()) return;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3568
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3569 // (2) If marking has been aborted for Full GC, then we also abort.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3570 if (_cm->has_aborted()) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3571 set_has_aborted();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3572 statsOnly( ++_aborted_cm_aborted );
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3573 return;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3574 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3575
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3576 double curr_time_ms = os::elapsedVTime() * 1000.0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3577
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3578 // (3) If marking stats are enabled, then we update the step history.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3579 #if _MARKING_STATS_
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3580 if (_words_scanned >= _words_scanned_limit) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3581 ++_clock_due_to_scanning;
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3582 }
23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3583 if (_refs_reached >= _refs_reached_limit) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3584 ++_clock_due_to_marking;
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3585 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3586
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3587 double last_interval_ms = curr_time_ms - _interval_start_time_ms;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3588 _interval_start_time_ms = curr_time_ms;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3589 _all_clock_intervals_ms.add(last_interval_ms);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3590
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3591 if (_cm->verbose_medium()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3592 gclog_or_tty->print_cr("[%u] regular clock, interval = %1.2lfms, "
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3593 "scanned = %d%s, refs reached = %d%s",
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3594 _worker_id, last_interval_ms,
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3595 _words_scanned,
23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3596 (_words_scanned >= _words_scanned_limit) ? " (*)" : "",
23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3597 _refs_reached,
23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3598 (_refs_reached >= _refs_reached_limit) ? " (*)" : "");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3599 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3600 #endif // _MARKING_STATS_
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3601
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3602 // (4) We check whether we should yield. If we have to, then we abort.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3603 if (_cm->should_yield()) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3604 // We should yield. To do this we abort the task. The caller is
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3605 // responsible for yielding.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3606 set_has_aborted();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3607 statsOnly( ++_aborted_yield );
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3608 return;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3609 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3610
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3611 // (5) We check whether we've reached our time quota. If we have,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3612 // then we abort.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3613 double elapsed_time_ms = curr_time_ms - _start_time_ms;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3614 if (elapsed_time_ms > _time_target_ms) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3615 set_has_aborted();
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	3616 _has_timed_out = true;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3617 statsOnly( ++_aborted_timed_out );
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3618 return;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3619 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3620
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3621 // (6) Finally, we check whether there are enough completed STAB
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3622 // buffers available for processing. If there are, we abort.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3623 SATBMarkQueueSet& satb_mq_set = JavaThread::satb_mark_queue_set();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3624 if (!_draining_satb_buffers && satb_mq_set.process_completed_buffers()) {
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3625 if (_cm->verbose_low()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3626 gclog_or_tty->print_cr("[%u] aborting to deal with pending SATB buffers",
8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3627 _worker_id);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3628 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3629 // we do need to process SATB buffers, we'll abort and restart
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3630 // the marking task to do so
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3631 set_has_aborted();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3632 statsOnly( ++_aborted_satb );
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3633 return;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3634 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3635 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3636
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3637 void CMTask::recalculate_limits() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3638 _real_words_scanned_limit = _words_scanned + words_scanned_period;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3639 _words_scanned_limit = _real_words_scanned_limit;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3640
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3641 _real_refs_reached_limit = _refs_reached + refs_reached_period;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3642 _refs_reached_limit = _real_refs_reached_limit;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3643 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3644
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3645 void CMTask::decrease_limits() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3646 // This is called when we believe that we're going to do an infrequent
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3647 // operation which will increase the per byte scanned cost (i.e. move
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3648 // entries to/from the global stack). It basically tries to decrease the
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3649 // scanning limit so that the clock is called earlier.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3650
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3651 if (_cm->verbose_medium()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3652 gclog_or_tty->print_cr("[%u] decreasing limits", _worker_id);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3653 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3654
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3655 _words_scanned_limit = _real_words_scanned_limit -
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3656 3 * words_scanned_period / 4;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3657 _refs_reached_limit = _real_refs_reached_limit -
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3658 3 * refs_reached_period / 4;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3659 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3660
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3661 void CMTask::move_entries_to_global_stack() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3662 // local array where we'll store the entries that will be popped
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3663 // from the local queue
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3664 oop buffer[global_stack_transfer_size];
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3665
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3666 int n = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3667 oop obj;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3668 while (n < global_stack_transfer_size && _task_queue->pop_local(obj)) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3669 buffer[n] = obj;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3670 ++n;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3671 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3672
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3673 if (n > 0) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3674 // we popped at least one entry from the local queue
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3675
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3676 statsOnly( ++_global_transfers_to; _local_pops += n );
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3677
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3678 if (!_cm->mark_stack_push(buffer, n)) {
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3679 if (_cm->verbose_low()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3680 gclog_or_tty->print_cr("[%u] aborting due to global stack overflow",
8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3681 _worker_id);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3682 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3683 set_has_aborted();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3684 } else {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3685 // the transfer was successful
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3686
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3687 if (_cm->verbose_medium()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3688 gclog_or_tty->print_cr("[%u] pushed %d entries to the global stack",
8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3689 _worker_id, n);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3690 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3691 statsOnly( int tmp_size = _cm->mark_stack_size();
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3692 if (tmp_size > _global_max_size) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3693 _global_max_size = tmp_size;
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3694 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3695 _global_pushes += n );
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3696 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3697 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3698
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3699 // this operation was quite expensive, so decrease the limits
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3700 decrease_limits();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3701 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3702
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3703 void CMTask::get_entries_from_global_stack() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3704 // local array where we'll store the entries that will be popped
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3705 // from the global stack.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3706 oop buffer[global_stack_transfer_size];
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3707 int n;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3708 _cm->mark_stack_pop(buffer, global_stack_transfer_size, &n);
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	3709 assert(n <= global_stack_transfer_size,
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	3710 "we should not pop more than the given limit");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3711 if (n > 0) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3712 // yes, we did actually pop at least one entry
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3713
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3714 statsOnly( ++_global_transfers_from; _global_pops += n );
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3715 if (_cm->verbose_medium()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3716 gclog_or_tty->print_cr("[%u] popped %d entries from the global stack",
8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3717 _worker_id, n);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3718 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3719 for (int i = 0; i < n; ++i) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3720 bool success = _task_queue->push(buffer[i]);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3721 // We only call this when the local queue is empty or under a
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3722 // given target limit. So, we do not expect this push to fail.
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	3723 assert(success, "invariant");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3724 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3725
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3726 statsOnly( int tmp_size = _task_queue->size();
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3727 if (tmp_size > _local_max_size) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3728 _local_max_size = tmp_size;
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3729 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3730 _local_pushes += n );
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3731 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3732
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3733 // this operation was quite expensive, so decrease the limits
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3734 decrease_limits();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3735 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3736
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3737 void CMTask::drain_local_queue(bool partially) {
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3738 if (has_aborted()) return;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3739
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3740 // Decide what the target size is, depending whether we're going to
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3741 // drain it partially (so that other tasks can steal if they run out
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3742 // of things to do) or totally (at the very end).
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3743 size_t target_size;
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3744 if (partially) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3745 target_size = MIN2((size_t)_task_queue->max_elems()/3, GCDrainStackTargetSize);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3746 } else {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3747 target_size = 0;
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3748 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3749
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3750 if (_task_queue->size() > target_size) {
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3751 if (_cm->verbose_high()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3752 gclog_or_tty->print_cr("[%u] draining local queue, target size = %d",
8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3753 _worker_id, target_size);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3754 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3755
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3756 oop obj;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3757 bool ret = _task_queue->pop_local(obj);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3758 while (ret) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3759 statsOnly( ++_local_pops );
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3760
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3761 if (_cm->verbose_high()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3762 gclog_or_tty->print_cr("[%u] popped "PTR_FORMAT, _worker_id,
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3763 (void*) obj);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3764 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3765
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	3766 assert(_g1h->is_in_g1_reserved((HeapWord*) obj), "invariant" );
2361 1216415d8e35 7014923: G1: code cleanup tonyp parents: 2177 diff changeset	3767 assert(!_g1h->is_on_master_free_list(
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	3768 _g1h->heap_region_containing((HeapWord*) obj)), "invariant");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3769
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3770 scan_object(obj);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3771
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3772 if (_task_queue->size() <= target_size \|\| has_aborted()) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3773 ret = false;
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3774 } else {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3775 ret = _task_queue->pop_local(obj);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3776 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3777 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3778
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3779 if (_cm->verbose_high()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3780 gclog_or_tty->print_cr("[%u] drained local queue, size = %d",
8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3781 _worker_id, _task_queue->size());
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3782 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3783 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3784 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3785
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3786 void CMTask::drain_global_stack(bool partially) {
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3787 if (has_aborted()) return;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3788
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3789 // We have a policy to drain the local queue before we attempt to
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3790 // drain the global stack.
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	3791 assert(partially \|\| _task_queue->size() == 0, "invariant");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3792
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3793 // Decide what the target size is, depending whether we're going to
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3794 // drain it partially (so that other tasks can steal if they run out
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3795 // of things to do) or totally (at the very end). Notice that,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3796 // because we move entries from the global stack in chunks or
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3797 // because another task might be doing the same, we might in fact
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3798 // drop below the target. But, this is not a problem.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3799 size_t target_size;
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3800 if (partially) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3801 target_size = _cm->partial_mark_stack_size_target();
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3802 } else {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3803 target_size = 0;
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3804 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3805
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3806 if (_cm->mark_stack_size() > target_size) {
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3807 if (_cm->verbose_low()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3808 gclog_or_tty->print_cr("[%u] draining global_stack, target size %d",
8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3809 _worker_id, target_size);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3810 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3811
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3812 while (!has_aborted() && _cm->mark_stack_size() > target_size) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3813 get_entries_from_global_stack();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3814 drain_local_queue(partially);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3815 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3816
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3817 if (_cm->verbose_low()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3818 gclog_or_tty->print_cr("[%u] drained global stack, size = %d",
8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3819 _worker_id, _cm->mark_stack_size());
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3820 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3821 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3822 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3823
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3824 // SATB Queue has several assumptions on whether to call the par or
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3825 // non-par versions of the methods. this is why some of the code is
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3826 // replicated. We should really get rid of the single-threaded version
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3827 // of the code to simplify things.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3828 void CMTask::drain_satb_buffers() {
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3829 if (has_aborted()) return;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3830
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3831 // We set this so that the regular clock knows that we're in the
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3832 // middle of draining buffers and doesn't set the abort flag when it
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3833 // notices that SATB buffers are available for draining. It'd be
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3834 // very counter productive if it did that. :-)
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3835 _draining_satb_buffers = true;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3836
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3837 CMObjectClosure oc(this);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3838 SATBMarkQueueSet& satb_mq_set = JavaThread::satb_mark_queue_set();
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3839 if (G1CollectedHeap::use_parallel_gc_threads()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3840 satb_mq_set.set_par_closure(_worker_id, &oc);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3841 } else {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3842 satb_mq_set.set_closure(&oc);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3843 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3844
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3845 // This keeps claiming and applying the closure to completed buffers
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3846 // until we run out of buffers or we need to abort.
1833 8b10f48633dc 6984287: Regularize how GC parallel workers are specified. jmasa parents: 1719 diff changeset	3847 if (G1CollectedHeap::use_parallel_gc_threads()) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3848 while (!has_aborted() &&
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3849 satb_mq_set.par_apply_closure_to_completed_buffer(_worker_id)) {
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3850 if (_cm->verbose_medium()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3851 gclog_or_tty->print_cr("[%u] processed an SATB buffer", _worker_id);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3852 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3853 statsOnly( ++_satb_buffers_processed );
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3854 regular_clock_call();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3855 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3856 } else {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3857 while (!has_aborted() &&
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3858 satb_mq_set.apply_closure_to_completed_buffer()) {
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3859 if (_cm->verbose_medium()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3860 gclog_or_tty->print_cr("[%u] processed an SATB buffer", _worker_id);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3861 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3862 statsOnly( ++_satb_buffers_processed );
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3863 regular_clock_call();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3864 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3865 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3866
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3867 if (!concurrent() && !has_aborted()) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3868 // We should only do this during remark.
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3869 if (G1CollectedHeap::use_parallel_gc_threads()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3870 satb_mq_set.par_iterate_closure_all_threads(_worker_id);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3871 } else {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3872 satb_mq_set.iterate_closure_all_threads();
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3873 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3874 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3875
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3876 _draining_satb_buffers = false;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3877
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	3878 assert(has_aborted() \|\|
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	3879 concurrent() \|\|
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	3880 satb_mq_set.completed_buffers_num() == 0, "invariant");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3881
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3882 if (G1CollectedHeap::use_parallel_gc_threads()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3883 satb_mq_set.set_par_closure(_worker_id, NULL);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3884 } else {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3885 satb_mq_set.set_closure(NULL);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3886 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3887
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3888 // again, this was a potentially expensive operation, decrease the
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3889 // limits to get the regular clock call early
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3890 decrease_limits();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3891 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3892
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3893 void CMTask::print_stats() {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3894 gclog_or_tty->print_cr("Marking Stats, task = %u, calls = %d",
8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3895 _worker_id, _calls);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3896 gclog_or_tty->print_cr(" Elapsed time = %1.2lfms, Termination time = %1.2lfms",
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3897 _elapsed_time_ms, _termination_time_ms);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3898 gclog_or_tty->print_cr(" Step Times (cum): num = %d, avg = %1.2lfms, sd = %1.2lfms",
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3899 _step_times_ms.num(), _step_times_ms.avg(),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3900 _step_times_ms.sd());
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3901 gclog_or_tty->print_cr(" max = %1.2lfms, total = %1.2lfms",
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3902 _step_times_ms.maximum(), _step_times_ms.sum());
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3903
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3904 #if _MARKING_STATS_
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3905 gclog_or_tty->print_cr(" Clock Intervals (cum): num = %d, avg = %1.2lfms, sd = %1.2lfms",
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3906 _all_clock_intervals_ms.num(), _all_clock_intervals_ms.avg(),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3907 _all_clock_intervals_ms.sd());
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3908 gclog_or_tty->print_cr(" max = %1.2lfms, total = %1.2lfms",
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3909 _all_clock_intervals_ms.maximum(),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3910 _all_clock_intervals_ms.sum());
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3911 gclog_or_tty->print_cr(" Clock Causes (cum): scanning = %d, marking = %d",
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3912 _clock_due_to_scanning, _clock_due_to_marking);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3913 gclog_or_tty->print_cr(" Objects: scanned = %d, found on the bitmap = %d",
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3914 _objs_scanned, _objs_found_on_bitmap);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3915 gclog_or_tty->print_cr(" Local Queue: pushes = %d, pops = %d, max size = %d",
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3916 _local_pushes, _local_pops, _local_max_size);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3917 gclog_or_tty->print_cr(" Global Stack: pushes = %d, pops = %d, max size = %d",
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3918 _global_pushes, _global_pops, _global_max_size);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3919 gclog_or_tty->print_cr(" transfers to = %d, transfers from = %d",
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3920 _global_transfers_to,_global_transfers_from);
5988 2a0172480595 7127697: G1: remove dead code after recent concurrent mark changes tonyp parents: 4837 diff changeset	3921 gclog_or_tty->print_cr(" Regions: claimed = %d", _regions_claimed);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3922 gclog_or_tty->print_cr(" SATB buffers: processed = %d", _satb_buffers_processed);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3923 gclog_or_tty->print_cr(" Steals: attempts = %d, successes = %d",
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3924 _steal_attempts, _steals);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3925 gclog_or_tty->print_cr(" Aborted: %d, due to", _aborted);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3926 gclog_or_tty->print_cr(" overflow: %d, global abort: %d, yield: %d",
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3927 _aborted_overflow, _aborted_cm_aborted, _aborted_yield);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3928 gclog_or_tty->print_cr(" time out: %d, SATB: %d, termination: %d",
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3929 _aborted_timed_out, _aborted_satb, _aborted_termination);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3930 #endif // _MARKING_STATS_
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3931 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3932
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3933 /*****************************************************************************
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3934
8787 fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	3935 The do_marking_step(time_target_ms, ...) method is the building
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	3936 block of the parallel marking framework. It can be called in parallel
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3937 with other invocations of do_marking_step() on different tasks
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3938 (but only one per task, obviously) and concurrently with the
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3939 mutator threads, or during remark, hence it eliminates the need
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3940 for two versions of the code. When called during remark, it will
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3941 pick up from where the task left off during the concurrent marking
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3942 phase. Interestingly, tasks are also claimable during evacuation
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3943 pauses too, since do_marking_step() ensures that it aborts before
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3944 it needs to yield.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3945
8787 fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	3946 The data structures that it uses to do marking work are the
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3947 following:
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3948
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3949 (1) Marking Bitmap. If there are gray objects that appear only
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3950 on the bitmap (this happens either when dealing with an overflow
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3951 or when the initial marking phase has simply marked the roots
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3952 and didn't push them on the stack), then tasks claim heap
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3953 regions whose bitmap they then scan to find gray objects. A
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3954 global finger indicates where the end of the last claimed region
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3955 is. A local finger indicates how far into the region a task has
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3956 scanned. The two fingers are used to determine how to gray an
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3957 object (i.e. whether simply marking it is OK, as it will be
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3958 visited by a task in the future, or whether it needs to be also
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3959 pushed on a stack).
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3960
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3961 (2) Local Queue. The local queue of the task which is accessed
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3962 reasonably efficiently by the task. Other tasks can steal from
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3963 it when they run out of work. Throughout the marking phase, a
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3964 task attempts to keep its local queue short but not totally
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3965 empty, so that entries are available for stealing by other
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3966 tasks. Only when there is no more work, a task will totally
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3967 drain its local queue.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3968
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3969 (3) Global Mark Stack. This handles local queue overflow. During
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3970 marking only sets of entries are moved between it and the local
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3971 queues, as access to it requires a mutex and more fine-grain
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3972 interaction with it which might cause contention. If it
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3973 overflows, then the marking phase should restart and iterate
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3974 over the bitmap to identify gray objects. Throughout the marking
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3975 phase, tasks attempt to keep the global mark stack at a small
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3976 length but not totally empty, so that entries are available for
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3977 popping by other tasks. Only when there is no more work, tasks
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3978 will totally drain the global mark stack.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3979
5988 2a0172480595 7127697: G1: remove dead code after recent concurrent mark changes tonyp parents: 4837 diff changeset	3980 (4) SATB Buffer Queue. This is where completed SATB buffers are
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3981 made available. Buffers are regularly removed from this queue
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3982 and scanned for roots, so that the queue doesn't get too
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3983 long. During remark, all completed buffers are processed, as
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3984 well as the filled in parts of any uncompleted buffers.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3985
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3986 The do_marking_step() method tries to abort when the time target
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3987 has been reached. There are a few other cases when the
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3988 do_marking_step() method also aborts:
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3989
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3990 (1) When the marking phase has been aborted (after a Full GC).
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3991
5988 2a0172480595 7127697: G1: remove dead code after recent concurrent mark changes tonyp parents: 4837 diff changeset	3992 (2) When a global overflow (on the global stack) has been
2a0172480595 7127697: G1: remove dead code after recent concurrent mark changes tonyp parents: 4837 diff changeset	3993 triggered. Before the task aborts, it will actually sync up with
2a0172480595 7127697: G1: remove dead code after recent concurrent mark changes tonyp parents: 4837 diff changeset	3994 the other tasks to ensure that all the marking data structures
8788 e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	3995 (local queues, stacks, fingers etc.) are re-initialized so that
5988 2a0172480595 7127697: G1: remove dead code after recent concurrent mark changes tonyp parents: 4837 diff changeset	3996 when do_marking_step() completes, the marking phase can
2a0172480595 7127697: G1: remove dead code after recent concurrent mark changes tonyp parents: 4837 diff changeset	3997 immediately restart.
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3998
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3999 (3) When enough completed SATB buffers are available. The
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4000 do_marking_step() method only tries to drain SATB buffers right
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4001 at the beginning. So, if enough buffers are available, the
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4002 marking step aborts and the SATB buffers are processed at
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4003 the beginning of the next invocation.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4004
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4005 (4) To yield. when we have to yield then we abort and yield
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4006 right at the end of do_marking_step(). This saves us from a lot
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4007 of hassle as, by yielding we might allow a Full GC. If this
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4008 happens then objects will be compacted underneath our feet, the
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4009 heap might shrink, etc. We save checking for this by just
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4010 aborting and doing the yield right at the end.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4011
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4012 From the above it follows that the do_marking_step() method should
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4013 be called in a loop (or, otherwise, regularly) until it completes.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4014
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4015 If a marking step completes without its has_aborted() flag being
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4016 true, it means it has completed the current marking phase (and
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4017 also all other marking tasks have done so and have all synced up).
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4018
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4019 A method called regular_clock_call() is invoked "regularly" (in
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4020 sub ms intervals) throughout marking. It is this clock method that
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4021 checks all the abort conditions which were mentioned above and
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4022 decides when the task should abort. A work-based scheme is used to
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4023 trigger this clock method: when the number of object words the
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4024 marking phase has scanned or the number of references the marking
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4025 phase has visited reach a given limit. Additional invocations to
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4026 the method clock have been planted in a few other strategic places
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4027 too. The initial reason for the clock method was to avoid calling
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4028 vtime too regularly, as it is quite expensive. So, once it was in
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4029 place, it was natural to piggy-back all the other conditions on it
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4030 too and not constantly check them throughout the code.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4031
8787 fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	4032 If do_termination is true then do_marking_step will enter its
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	4033 termination protocol.
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	4034
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	4035 The value of is_serial must be true when do_marking_step is being
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	4036 called serially (i.e. by the VMThread) and do_marking_step should
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	4037 skip any synchronization in the termination and overflow code.
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	4038 Examples include the serial remark code and the serial reference
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	4039 processing closures.
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	4040
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	4041 The value of is_serial must be false when do_marking_step is
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	4042 being called by any of the worker threads in a work gang.
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	4043 Examples include the concurrent marking code (CMMarkingTask),
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	4044 the MT remark code, and the MT reference processing closures.
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	4045
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4046 *****************************************************************************/
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4047
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	4048 void CMTask::do_marking_step(double time_target_ms,
8787 fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	4049 bool do_termination,
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	4050 bool is_serial) {
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	4051 assert(time_target_ms >= 1.0, "minimum granularity is 1ms");
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	4052 assert(concurrent() == _cm->concurrent(), "they should be the same");
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	4053
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4054 G1CollectorPolicy* g1_policy = _g1h->g1_policy();
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	4055 assert(_task_queues != NULL, "invariant");
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	4056 assert(_task_queue != NULL, "invariant");
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	4057 assert(_task_queues->queue(_worker_id) == _task_queue, "invariant");
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	4058
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	4059 assert(!_claimed,
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	4060 "only one thread should claim this task at any one time");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4061
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4062 // OK, this doesn't safeguard again all possible scenarios, as it is
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4063 // possible for two threads to set the _claimed flag at the same
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4064 // time. But it is only for debugging purposes anyway and it will
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4065 // catch most problems.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4066 _claimed = true;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4067
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4068 _start_time_ms = os::elapsedVTime() * 1000.0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4069 statsOnly( _interval_start_time_ms = _start_time_ms );
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4070
8787 fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	4071 // If do_stealing is true then do_marking_step will attempt to
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	4072 // steal work from the other CMTasks. It only makes sense to
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	4073 // enable stealing when the termination protocol is enabled
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	4074 // and do_marking_step() is not being called serially.
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	4075 bool do_stealing = do_termination && !is_serial;
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	4076
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4077 double diff_prediction_ms =
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4078 g1_policy->get_new_prediction(&_marking_step_diffs_ms);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4079 _time_target_ms = time_target_ms - diff_prediction_ms;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4080
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4081 // set up the variables that are used in the work-based scheme to
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4082 // call the regular clock method
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4083 _words_scanned = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4084 _refs_reached = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4085 recalculate_limits();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4086
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4087 // clear all flags
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4088 clear_has_aborted();
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	4089 _has_timed_out = false;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4090 _draining_satb_buffers = false;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4091
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4092 ++_calls;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4093
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	4094 if (_cm->verbose_low()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	4095 gclog_or_tty->print_cr("[%u] >>>>>>>>>> START, call = %d, "
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4096 "target = %1.2lfms >>>>>>>>>>",
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	4097 _worker_id, _calls, _time_target_ms);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	4098 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4099
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4100 // Set up the bitmap and oop closures. Anything that uses them is
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4101 // eventually called from this method, so it is OK to allocate these
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4102 // statically.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4103 CMBitMapClosure bitmap_closure(this, _cm, _nextMarkBitMap);
3771 842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	4104 G1CMOopClosure cm_oop_closure(_g1h, _cm, this);
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	4105 set_cm_oop_closure(&cm_oop_closure);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4106
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4107 if (_cm->has_overflown()) {
5988 2a0172480595 7127697: G1: remove dead code after recent concurrent mark changes tonyp parents: 4837 diff changeset	4108 // This can happen if the mark stack overflows during a GC pause
2a0172480595 7127697: G1: remove dead code after recent concurrent mark changes tonyp parents: 4837 diff changeset	4109 // and this task, after a yield point, restarts. We have to abort
2a0172480595 7127697: G1: remove dead code after recent concurrent mark changes tonyp parents: 4837 diff changeset	4110 // as we need to get into the overflow protocol which happens
2a0172480595 7127697: G1: remove dead code after recent concurrent mark changes tonyp parents: 4837 diff changeset	4111 // right at the end of this task.
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4112 set_has_aborted();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4113 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4114
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4115 // First drain any available SATB buffers. After this, we will not
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4116 // look at SATB buffers before the next invocation of this method.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4117 // If enough completed SATB buffers are queued up, the regular clock
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4118 // will abort this task so that it restarts.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4119 drain_satb_buffers();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4120 // ...then partially drain the local queue and the global stack
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4121 drain_local_queue(true);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4122 drain_global_stack(true);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4123
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4124 do {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4125 if (!has_aborted() && _curr_region != NULL) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4126 // This means that we're already holding on to a region.
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	4127 assert(_finger != NULL, "if region is not NULL, then the finger "
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	4128 "should not be NULL either");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4129
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4130 // We might have restarted this task after an evacuation pause
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4131 // which might have evacuated the region we're holding on to
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4132 // underneath our feet. Let's read its limit again to make sure
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4133 // that we do not iterate over a region of the heap that
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4134 // contains garbage (update_region_limit() will also move
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4135 // _finger to the start of the region if it is found empty).
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4136 update_region_limit();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4137 // We will start from _finger not from the start of the region,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4138 // as we might be restarting this task after aborting half-way
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4139 // through scanning this region. In this case, _finger points to
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4140 // the address where we last found a marked object. If this is a
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4141 // fresh region, _finger points to start().
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4142 MemRegion mr = MemRegion(_finger, _region_limit);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4143
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	4144 if (_cm->verbose_low()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	4145 gclog_or_tty->print_cr("[%u] we're scanning part "
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4146 "["PTR_FORMAT", "PTR_FORMAT") "
8039 5e401ef52ec0 8007772: G1: assert(!hr->isHumongous() \|\| mr.start() == hr->bottom()) failed: the start of HeapRegion and MemRegion should be consistent for humongous regions johnc parents: 8034 diff changeset	4147 "of region "HR_FORMAT,
5e401ef52ec0 8007772: G1: assert(!hr->isHumongous() \|\| mr.start() == hr->bottom()) failed: the start of HeapRegion and MemRegion should be consistent for humongous regions johnc parents: 8034 diff changeset	4148 _worker_id, _finger, _region_limit,
5e401ef52ec0 8007772: G1: assert(!hr->isHumongous() \|\| mr.start() == hr->bottom()) failed: the start of HeapRegion and MemRegion should be consistent for humongous regions johnc parents: 8034 diff changeset	4149 HR_FORMAT_PARAMS(_curr_region));
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	4150 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4151
8039 5e401ef52ec0 8007772: G1: assert(!hr->isHumongous() \|\| mr.start() == hr->bottom()) failed: the start of HeapRegion and MemRegion should be consistent for humongous regions johnc parents: 8034 diff changeset	4152 assert(!_curr_region->isHumongous() \|\| mr.start() == _curr_region->bottom(),
5e401ef52ec0 8007772: G1: assert(!hr->isHumongous() \|\| mr.start() == hr->bottom()) failed: the start of HeapRegion and MemRegion should be consistent for humongous regions johnc parents: 8034 diff changeset	4153 "humongous regions should go around loop once only");
5e401ef52ec0 8007772: G1: assert(!hr->isHumongous() \|\| mr.start() == hr->bottom()) failed: the start of HeapRegion and MemRegion should be consistent for humongous regions johnc parents: 8034 diff changeset	4154
5e401ef52ec0 8007772: G1: assert(!hr->isHumongous() \|\| mr.start() == hr->bottom()) failed: the start of HeapRegion and MemRegion should be consistent for humongous regions johnc parents: 8034 diff changeset	4155 // Some special cases:
5e401ef52ec0 8007772: G1: assert(!hr->isHumongous() \|\| mr.start() == hr->bottom()) failed: the start of HeapRegion and MemRegion should be consistent for humongous regions johnc parents: 8034 diff changeset	4156 // If the memory region is empty, we can just give up the region.
5e401ef52ec0 8007772: G1: assert(!hr->isHumongous() \|\| mr.start() == hr->bottom()) failed: the start of HeapRegion and MemRegion should be consistent for humongous regions johnc parents: 8034 diff changeset	4157 // If the current region is humongous then we only need to check
5e401ef52ec0 8007772: G1: assert(!hr->isHumongous() \|\| mr.start() == hr->bottom()) failed: the start of HeapRegion and MemRegion should be consistent for humongous regions johnc parents: 8034 diff changeset	4158 // the bitmap for the bit associated with the start of the object,
5e401ef52ec0 8007772: G1: assert(!hr->isHumongous() \|\| mr.start() == hr->bottom()) failed: the start of HeapRegion and MemRegion should be consistent for humongous regions johnc parents: 8034 diff changeset	4159 // scan the object if it's live, and give up the region.
5e401ef52ec0 8007772: G1: assert(!hr->isHumongous() \|\| mr.start() == hr->bottom()) failed: the start of HeapRegion and MemRegion should be consistent for humongous regions johnc parents: 8034 diff changeset	4160 // Otherwise, let's iterate over the bitmap of the part of the region
5e401ef52ec0 8007772: G1: assert(!hr->isHumongous() \|\| mr.start() == hr->bottom()) failed: the start of HeapRegion and MemRegion should be consistent for humongous regions johnc parents: 8034 diff changeset	4161 // that is left.
8034 bce1ac447f6b 7052429: G1: Avoid unnecessary scanning of humongous regions during concurrent marking johnc parents: 8014 diff changeset	4162 // If the iteration is successful, give up the region.
8039 5e401ef52ec0 8007772: G1: assert(!hr->isHumongous() \|\| mr.start() == hr->bottom()) failed: the start of HeapRegion and MemRegion should be consistent for humongous regions johnc parents: 8034 diff changeset	4163 if (mr.is_empty()) {
5e401ef52ec0 8007772: G1: assert(!hr->isHumongous() \|\| mr.start() == hr->bottom()) failed: the start of HeapRegion and MemRegion should be consistent for humongous regions johnc parents: 8034 diff changeset	4164 giveup_current_region();
5e401ef52ec0 8007772: G1: assert(!hr->isHumongous() \|\| mr.start() == hr->bottom()) failed: the start of HeapRegion and MemRegion should be consistent for humongous regions johnc parents: 8034 diff changeset	4165 regular_clock_call();
5e401ef52ec0 8007772: G1: assert(!hr->isHumongous() \|\| mr.start() == hr->bottom()) failed: the start of HeapRegion and MemRegion should be consistent for humongous regions johnc parents: 8034 diff changeset	4166 } else if (_curr_region->isHumongous() && mr.start() == _curr_region->bottom()) {
5e401ef52ec0 8007772: G1: assert(!hr->isHumongous() \|\| mr.start() == hr->bottom()) failed: the start of HeapRegion and MemRegion should be consistent for humongous regions johnc parents: 8034 diff changeset	4167 if (_nextMarkBitMap->isMarked(mr.start())) {
5e401ef52ec0 8007772: G1: assert(!hr->isHumongous() \|\| mr.start() == hr->bottom()) failed: the start of HeapRegion and MemRegion should be consistent for humongous regions johnc parents: 8034 diff changeset	4168 // The object is marked - apply the closure
5e401ef52ec0 8007772: G1: assert(!hr->isHumongous() \|\| mr.start() == hr->bottom()) failed: the start of HeapRegion and MemRegion should be consistent for humongous regions johnc parents: 8034 diff changeset	4169 BitMap::idx_t offset = _nextMarkBitMap->heapWordToOffset(mr.start());
5e401ef52ec0 8007772: G1: assert(!hr->isHumongous() \|\| mr.start() == hr->bottom()) failed: the start of HeapRegion and MemRegion should be consistent for humongous regions johnc parents: 8034 diff changeset	4170 bitmap_closure.do_bit(offset);
5e401ef52ec0 8007772: G1: assert(!hr->isHumongous() \|\| mr.start() == hr->bottom()) failed: the start of HeapRegion and MemRegion should be consistent for humongous regions johnc parents: 8034 diff changeset	4171 }
5e401ef52ec0 8007772: G1: assert(!hr->isHumongous() \|\| mr.start() == hr->bottom()) failed: the start of HeapRegion and MemRegion should be consistent for humongous regions johnc parents: 8034 diff changeset	4172 // Even if this task aborted while scanning the humongous object
5e401ef52ec0 8007772: G1: assert(!hr->isHumongous() \|\| mr.start() == hr->bottom()) failed: the start of HeapRegion and MemRegion should be consistent for humongous regions johnc parents: 8034 diff changeset	4173 // we can (and should) give up the current region.
5e401ef52ec0 8007772: G1: assert(!hr->isHumongous() \|\| mr.start() == hr->bottom()) failed: the start of HeapRegion and MemRegion should be consistent for humongous regions johnc parents: 8034 diff changeset	4174 giveup_current_region();
5e401ef52ec0 8007772: G1: assert(!hr->isHumongous() \|\| mr.start() == hr->bottom()) failed: the start of HeapRegion and MemRegion should be consistent for humongous regions johnc parents: 8034 diff changeset	4175 regular_clock_call();
5e401ef52ec0 8007772: G1: assert(!hr->isHumongous() \|\| mr.start() == hr->bottom()) failed: the start of HeapRegion and MemRegion should be consistent for humongous regions johnc parents: 8034 diff changeset	4176 } else if (_nextMarkBitMap->iterate(&bitmap_closure, mr)) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4177 giveup_current_region();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4178 regular_clock_call();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4179 } else {
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	4180 assert(has_aborted(), "currently the only way to do so");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4181 // The only way to abort the bitmap iteration is to return
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4182 // false from the do_bit() method. However, inside the
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4183 // do_bit() method we move the _finger to point to the
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4184 // object currently being looked at. So, if we bail out, we
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4185 // have definitely set _finger to something non-null.
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	4186 assert(_finger != NULL, "invariant");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4187
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4188 // Region iteration was actually aborted. So now _finger
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4189 // points to the address of the object we last scanned. If we
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4190 // leave it there, when we restart this task, we will rescan
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4191 // the object. It is easy to avoid this. We move the finger by
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4192 // enough to point to the next possible object header (the
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4193 // bitmap knows by how much we need to move it as it knows its
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4194 // granularity).
1314 3f0549ed0c98 6921710: G1: assert(new_finger >= _finger && new_finger < _region_limit,"invariant") apetrusenko parents: 1284 diff changeset	4195 assert(_finger < _region_limit, "invariant");
8733 9def4075da6d 8008079: G1: Add nextObject routine to CMBitMapRO and replace nextWord tamao parents: 8039 diff changeset	4196 HeapWord* new_finger = _nextMarkBitMap->nextObject(_finger);
1314 3f0549ed0c98 6921710: G1: assert(new_finger >= _finger && new_finger < _region_limit,"invariant") apetrusenko parents: 1284 diff changeset	4197 // Check if bitmap iteration was aborted while scanning the last object
3f0549ed0c98 6921710: G1: assert(new_finger >= _finger && new_finger < _region_limit,"invariant") apetrusenko parents: 1284 diff changeset	4198 if (new_finger >= _region_limit) {
5988 2a0172480595 7127697: G1: remove dead code after recent concurrent mark changes tonyp parents: 4837 diff changeset	4199 giveup_current_region();
1314 3f0549ed0c98 6921710: G1: assert(new_finger >= _finger && new_finger < _region_limit,"invariant") apetrusenko parents: 1284 diff changeset	4200 } else {
5988 2a0172480595 7127697: G1: remove dead code after recent concurrent mark changes tonyp parents: 4837 diff changeset	4201 move_finger_to(new_finger);
1314 3f0549ed0c98 6921710: G1: assert(new_finger >= _finger && new_finger < _region_limit,"invariant") apetrusenko parents: 1284 diff changeset	4202 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4203 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4204 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4205 // At this point we have either completed iterating over the
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4206 // region we were holding on to, or we have aborted.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4207
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4208 // We then partially drain the local queue and the global stack.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4209 // (Do we really need this?)
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4210 drain_local_queue(true);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4211 drain_global_stack(true);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4212
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4213 // Read the note on the claim_region() method on why it might
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4214 // return NULL with potentially more regions available for
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4215 // claiming and why we have to check out_of_regions() to determine
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4216 // whether we're done or not.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4217 while (!has_aborted() && _curr_region == NULL && !_cm->out_of_regions()) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4218 // We are going to try to claim a new region. We should have
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4219 // given up on the previous one.
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	4220 // Separated the asserts so that we know which one fires.
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	4221 assert(_curr_region == NULL, "invariant");
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	4222 assert(_finger == NULL, "invariant");
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	4223 assert(_region_limit == NULL, "invariant");
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	4224 if (_cm->verbose_low()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	4225 gclog_or_tty->print_cr("[%u] trying to claim a new region", _worker_id);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	4226 }
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	4227 HeapRegion* claimed_region = _cm->claim_region(_worker_id);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4228 if (claimed_region != NULL) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4229 // Yes, we managed to claim one
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4230 statsOnly( ++_regions_claimed );
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4231
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	4232 if (_cm->verbose_low()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	4233 gclog_or_tty->print_cr("[%u] we successfully claimed "
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4234 "region "PTR_FORMAT,
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	4235 _worker_id, claimed_region);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	4236 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4237
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4238 setup_for_region(claimed_region);
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	4239 assert(_curr_region == claimed_region, "invariant");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4240 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4241 // It is important to call the regular clock here. It might take
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4242 // a while to claim a region if, for example, we hit a large
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4243 // block of empty regions. So we need to call the regular clock
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4244 // method once round the loop to make sure it's called
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4245 // frequently enough.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4246 regular_clock_call();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4247 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4248
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4249 if (!has_aborted() && _curr_region == NULL) {
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	4250 assert(_cm->out_of_regions(),
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	4251 "at this point we should be out of regions");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4252 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4253 } while ( _curr_region != NULL && !has_aborted());
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4254
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4255 if (!has_aborted()) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4256 // We cannot check whether the global stack is empty, since other
5988 2a0172480595 7127697: G1: remove dead code after recent concurrent mark changes tonyp parents: 4837 diff changeset	4257 // tasks might be pushing objects to it concurrently.
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	4258 assert(_cm->out_of_regions(),
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	4259 "at this point we should be out of regions");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4260
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	4261 if (_cm->verbose_low()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	4262 gclog_or_tty->print_cr("[%u] all regions claimed", _worker_id);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	4263 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4264
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4265 // Try to reduce the number of available SATB buffers so that
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4266 // remark has less work to do.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4267 drain_satb_buffers();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4268 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4269
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4270 // Since we've done everything else, we can now totally drain the
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4271 // local queue and global stack.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4272 drain_local_queue(false);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4273 drain_global_stack(false);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4274
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4275 // Attempt at work stealing from other task's queues.
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	4276 if (do_stealing && !has_aborted()) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4277 // We have not aborted. This means that we have finished all that
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4278 // we could. Let's try to do some stealing...
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4279
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4280 // We cannot check whether the global stack is empty, since other
5988 2a0172480595 7127697: G1: remove dead code after recent concurrent mark changes tonyp parents: 4837 diff changeset	4281 // tasks might be pushing objects to it concurrently.
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	4282 assert(_cm->out_of_regions() && _task_queue->size() == 0,
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	4283 "only way to reach here");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4284
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	4285 if (_cm->verbose_low()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	4286 gclog_or_tty->print_cr("[%u] starting to steal", _worker_id);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	4287 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4288
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4289 while (!has_aborted()) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4290 oop obj;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4291 statsOnly( ++_steal_attempts );
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4292
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	4293 if (_cm->try_stealing(_worker_id, &_hash_seed, obj)) {
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	4294 if (_cm->verbose_medium()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	4295 gclog_or_tty->print_cr("[%u] stolen "PTR_FORMAT" successfully",
8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	4296 _worker_id, (void*) obj);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	4297 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4298
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4299 statsOnly( ++_steals );
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4300
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	4301 assert(_nextMarkBitMap->isMarked((HeapWord*) obj),
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	4302 "any stolen object should be marked");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4303 scan_object(obj);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4304
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4305 // And since we're towards the end, let's totally drain the
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4306 // local queue and global stack.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4307 drain_local_queue(false);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4308 drain_global_stack(false);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4309 } else {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4310 break;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4311 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4312 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4313 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4314
3316 cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	4315 // If we are about to wrap up and go into termination, check if we
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	4316 // should raise the overflow flag.
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	4317 if (do_termination && !has_aborted()) {
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	4318 if (_cm->force_overflow()->should_force()) {
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	4319 _cm->set_has_overflown();
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	4320 regular_clock_call();
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	4321 }
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	4322 }
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	4323
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4324 // We still haven't aborted. Now, let's try to get into the
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4325 // termination protocol.
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	4326 if (do_termination && !has_aborted()) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4327 // We cannot check whether the global stack is empty, since other
5988 2a0172480595 7127697: G1: remove dead code after recent concurrent mark changes tonyp parents: 4837 diff changeset	4328 // tasks might be concurrently pushing objects on it.
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	4329 // Separated the asserts so that we know which one fires.
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	4330 assert(_cm->out_of_regions(), "only way to reach here");
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	4331 assert(_task_queue->size() == 0, "only way to reach here");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4332
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	4333 if (_cm->verbose_low()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	4334 gclog_or_tty->print_cr("[%u] starting termination protocol", _worker_id);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	4335 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4336
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4337 _termination_start_time_ms = os::elapsedVTime() * 1000.0;
8787 fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	4338
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4339 // The CMTask class also extends the TerminatorTerminator class,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4340 // hence its should_exit_termination() method will also decide
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4341 // whether to exit the termination protocol or not.
8787 fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	4342 bool finished = (is_serial \|\|
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	4343 _cm->terminator()->offer_termination(this));
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4344 double termination_end_time_ms = os::elapsedVTime() * 1000.0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4345 _termination_time_ms +=
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4346 termination_end_time_ms - _termination_start_time_ms;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4347
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4348 if (finished) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4349 // We're all done.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4350
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	4351 if (_worker_id == 0) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4352 // let's allow task 0 to do this
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4353 if (concurrent()) {
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	4354 assert(_cm->concurrent_marking_in_progress(), "invariant");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4355 // we need to set this to false before the next
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4356 // safepoint. This way we ensure that the marking phase
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4357 // doesn't observe any more heap expansions.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4358 _cm->clear_concurrent_marking_in_progress();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4359 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4360 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4361
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4362 // We can now guarantee that the global stack is empty, since
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	4363 // all other tasks have finished. We separated the guarantees so
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	4364 // that, if a condition is false, we can immediately find out
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	4365 // which one.
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	4366 guarantee(_cm->out_of_regions(), "only way to reach here");
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	4367 guarantee(_cm->mark_stack_empty(), "only way to reach here");
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	4368 guarantee(_task_queue->size() == 0, "only way to reach here");
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	4369 guarantee(!_cm->has_overflown(), "only way to reach here");
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	4370 guarantee(!_cm->mark_stack_overflow(), "only way to reach here");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4371
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	4372 if (_cm->verbose_low()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	4373 gclog_or_tty->print_cr("[%u] all tasks terminated", _worker_id);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	4374 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4375 } else {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4376 // Apparently there's more work to do. Let's abort this task. It
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4377 // will restart it and we can hopefully find more things to do.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4378
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	4379 if (_cm->verbose_low()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	4380 gclog_or_tty->print_cr("[%u] apparently there is more work to do",
8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	4381 _worker_id);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	4382 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4383
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4384 set_has_aborted();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4385 statsOnly( ++_aborted_termination );
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4386 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4387 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4388
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4389 // Mainly for debugging purposes to make sure that a pointer to the
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4390 // closure which was statically allocated in this frame doesn't
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4391 // escape it by accident.
3771 842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	4392 set_cm_oop_closure(NULL);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4393 double end_time_ms = os::elapsedVTime() * 1000.0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4394 double elapsed_time_ms = end_time_ms - _start_time_ms;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4395 // Update the step history.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4396 _step_times_ms.add(elapsed_time_ms);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4397
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4398 if (has_aborted()) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4399 // The task was aborted for some reason.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4400
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4401 statsOnly( ++_aborted );
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4402
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	4403 if (_has_timed_out) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4404 double diff_ms = elapsed_time_ms - _time_target_ms;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4405 // Keep statistics of how well we did with respect to hitting
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4406 // our target only if we actually timed out (if we aborted for
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4407 // other reasons, then the results might get skewed).
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4408 _marking_step_diffs_ms.add(diff_ms);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4409 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4410
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4411 if (_cm->has_overflown()) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4412 // This is the interesting one. We aborted because a global
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4413 // overflow was raised. This means we have to restart the
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4414 // marking phase and start iterating over regions. However, in
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4415 // order to do this we have to make sure that all tasks stop
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4416 // what they are doing and re-initialise in a safe manner. We
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4417 // will achieve this with the use of two barrier sync points.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4418
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	4419 if (_cm->verbose_low()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	4420 gclog_or_tty->print_cr("[%u] detected overflow", _worker_id);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	4421 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4422
8787 fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	4423 if (!is_serial) {
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	4424 // We only need to enter the sync barrier if being called
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	4425 // from a parallel context
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	4426 _cm->enter_first_sync_barrier(_worker_id);
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	4427
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	4428 // When we exit this sync barrier we know that all tasks have
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	4429 // stopped doing marking work. So, it's now safe to
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	4430 // re-initialise our data structures. At the end of this method,
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	4431 // task 0 will clear the global data structures.
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	4432 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4433
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4434 statsOnly( ++_aborted_overflow );
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4435
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4436 // We clear the local state of this task...
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4437 clear_region_fields();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4438
8787 fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	4439 if (!is_serial) {
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	4440 // ...and enter the second barrier.
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	4441 _cm->enter_second_sync_barrier(_worker_id);
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	4442 }
8788 e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	4443 // At this point, if we're during the concurrent phase of
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	4444 // marking, everything has been re-initialized and we're
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4445 // ready to restart.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4446 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4447
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4448 if (_cm->verbose_low()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	4449 gclog_or_tty->print_cr("[%u] <<<<<<<<<< ABORTING, target = %1.2lfms, "
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4450 "elapsed = %1.2lfms <<<<<<<<<<",
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	4451 _worker_id, _time_target_ms, elapsed_time_ms);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	4452 if (_cm->has_aborted()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	4453 gclog_or_tty->print_cr("[%u] ========== MARKING ABORTED ==========",
8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	4454 _worker_id);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	4455 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4456 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4457 } else {
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	4458 if (_cm->verbose_low()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	4459 gclog_or_tty->print_cr("[%u] <<<<<<<<<< FINISHED, target = %1.2lfms, "
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4460 "elapsed = %1.2lfms <<<<<<<<<<",
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	4461 _worker_id, _time_target_ms, elapsed_time_ms);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	4462 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4463 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4464
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4465 _claimed = false;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4466 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4467
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	4468 CMTask::CMTask(uint worker_id,
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4469 ConcurrentMark* cm,
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	4470 size_t* marked_bytes,
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	4471 BitMap* card_bm,
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4472 CMTaskQueue* task_queue,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4473 CMTaskQueueSet* task_queues)
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4474 : _g1h(G1CollectedHeap::heap()),
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	4475 _worker_id(worker_id), _cm(cm),
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4476 _claimed(false),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4477 _nextMarkBitMap(NULL), _hash_seed(17),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4478 _task_queue(task_queue),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4479 _task_queues(task_queues),
3771 842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	4480 _cm_oop_closure(NULL),
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	4481 _marked_bytes_array(marked_bytes),
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	4482 _card_bm(card_bm) {
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	4483 guarantee(task_queue != NULL, "invariant");
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	4484 guarantee(task_queues != NULL, "invariant");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4485
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4486 statsOnly( _clock_due_to_scanning = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4487 _clock_due_to_marking = 0 );
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4488
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4489 _marking_step_diffs_ms.add(0.5);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4490 }
2435 371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4491
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4492 // These are formatting macros that are used below to ensure
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4493 // consistent formatting. The _H_ versions are used to format the
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4494 // header for a particular value and they should be kept consistent
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4495 // with the corresponding macro. Also note that most of the macros add
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4496 // the necessary white space (as a prefix) which makes them a bit
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4497 // easier to compose.
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4498
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4499 // All the output lines are prefixed with this string to be able to
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4500 // identify them easily in a large log file.
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4501 #define G1PPRL_LINE_PREFIX "###"
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4502
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4503 #define G1PPRL_ADDR_BASE_FORMAT " "PTR_FORMAT"-"PTR_FORMAT
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4504 #ifdef _LP64
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4505 #define G1PPRL_ADDR_BASE_H_FORMAT " %37s"
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4506 #else // _LP64
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4507 #define G1PPRL_ADDR_BASE_H_FORMAT " %21s"
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4508 #endif // _LP64
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4509
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4510 // For per-region info
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4511 #define G1PPRL_TYPE_FORMAT " %-4s"
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4512 #define G1PPRL_TYPE_H_FORMAT " %4s"
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4513 #define G1PPRL_BYTE_FORMAT " "SIZE_FORMAT_W(9)
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4514 #define G1PPRL_BYTE_H_FORMAT " %9s"
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4515 #define G1PPRL_DOUBLE_FORMAT " %14.1f"
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4516 #define G1PPRL_DOUBLE_H_FORMAT " %14s"
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4517
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4518 // For summary info
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4519 #define G1PPRL_SUM_ADDR_FORMAT(tag) " "tag":"G1PPRL_ADDR_BASE_FORMAT
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4520 #define G1PPRL_SUM_BYTE_FORMAT(tag) " "tag": "SIZE_FORMAT
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4521 #define G1PPRL_SUM_MB_FORMAT(tag) " "tag": %1.2f MB"
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4522 #define G1PPRL_SUM_MB_PERC_FORMAT(tag) G1PPRL_SUM_MB_FORMAT(tag)" / %1.2f %%"
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4523
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4524 G1PrintRegionLivenessInfoClosure::
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4525 G1PrintRegionLivenessInfoClosure(outputStream* out, const char* phase_name)
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4526 : _out(out),
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4527 _total_used_bytes(0), _total_capacity_bytes(0),
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4528 _total_prev_live_bytes(0), _total_next_live_bytes(0),
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4529 _hum_used_bytes(0), _hum_capacity_bytes(0),
10290 05a17f270c7e 8014240: G1: Add remembered set size information to output of G1PrintRegionLivenessInfo tschatzl parents: 10186 diff changeset	4530 _hum_prev_live_bytes(0), _hum_next_live_bytes(0),
12080 5888334c9c24 7145569: G1: optimize nmethods scanning johnc parents: 10405 diff changeset	4531 _total_remset_bytes(0), _total_strong_code_roots_bytes(0) {
2435 371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4532 G1CollectedHeap* g1h = G1CollectedHeap::heap();
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4533 MemRegion g1_committed = g1h->g1_committed();
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4534 MemRegion g1_reserved = g1h->g1_reserved();
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4535 double now = os::elapsedTime();
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4536
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4537 // Print the header of the output.
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4538 _out->cr();
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4539 _out->print_cr(G1PPRL_LINE_PREFIX" PHASE %s @ %1.3f", phase_name, now);
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4540 _out->print_cr(G1PPRL_LINE_PREFIX" HEAP"
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4541 G1PPRL_SUM_ADDR_FORMAT("committed")
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4542 G1PPRL_SUM_ADDR_FORMAT("reserved")
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4543 G1PPRL_SUM_BYTE_FORMAT("region-size"),
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4544 g1_committed.start(), g1_committed.end(),
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4545 g1_reserved.start(), g1_reserved.end(),
3986 65a8ff39a6da 7095194: G1: HeapRegion::GrainBytes, GrainWords, and CardsPerRegion should be size_t johnc parents: 3979 diff changeset	4546 HeapRegion::GrainBytes);
2435 371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4547 _out->print_cr(G1PPRL_LINE_PREFIX);
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4548 _out->print_cr(G1PPRL_LINE_PREFIX
10290 05a17f270c7e 8014240: G1: Add remembered set size information to output of G1PrintRegionLivenessInfo tschatzl parents: 10186 diff changeset	4549 G1PPRL_TYPE_H_FORMAT
05a17f270c7e 8014240: G1: Add remembered set size information to output of G1PrintRegionLivenessInfo tschatzl parents: 10186 diff changeset	4550 G1PPRL_ADDR_BASE_H_FORMAT
05a17f270c7e 8014240: G1: Add remembered set size information to output of G1PrintRegionLivenessInfo tschatzl parents: 10186 diff changeset	4551 G1PPRL_BYTE_H_FORMAT
05a17f270c7e 8014240: G1: Add remembered set size information to output of G1PrintRegionLivenessInfo tschatzl parents: 10186 diff changeset	4552 G1PPRL_BYTE_H_FORMAT
05a17f270c7e 8014240: G1: Add remembered set size information to output of G1PrintRegionLivenessInfo tschatzl parents: 10186 diff changeset	4553 G1PPRL_BYTE_H_FORMAT
05a17f270c7e 8014240: G1: Add remembered set size information to output of G1PrintRegionLivenessInfo tschatzl parents: 10186 diff changeset	4554 G1PPRL_DOUBLE_H_FORMAT
12080 5888334c9c24 7145569: G1: optimize nmethods scanning johnc parents: 10405 diff changeset	4555 G1PPRL_BYTE_H_FORMAT
10290 05a17f270c7e 8014240: G1: Add remembered set size information to output of G1PrintRegionLivenessInfo tschatzl parents: 10186 diff changeset	4556 G1PPRL_BYTE_H_FORMAT,
05a17f270c7e 8014240: G1: Add remembered set size information to output of G1PrintRegionLivenessInfo tschatzl parents: 10186 diff changeset	4557 "type", "address-range",
12080 5888334c9c24 7145569: G1: optimize nmethods scanning johnc parents: 10405 diff changeset	4558 "used", "prev-live", "next-live", "gc-eff",
5888334c9c24 7145569: G1: optimize nmethods scanning johnc parents: 10405 diff changeset	4559 "remset", "code-roots");
3977 5cc33133bc6d 7092245: G1: Wrong format specifier in G1PrintRegionLivenessInfo header output johnc parents: 3975 diff changeset	4560 _out->print_cr(G1PPRL_LINE_PREFIX
10290 05a17f270c7e 8014240: G1: Add remembered set size information to output of G1PrintRegionLivenessInfo tschatzl parents: 10186 diff changeset	4561 G1PPRL_TYPE_H_FORMAT
05a17f270c7e 8014240: G1: Add remembered set size information to output of G1PrintRegionLivenessInfo tschatzl parents: 10186 diff changeset	4562 G1PPRL_ADDR_BASE_H_FORMAT
05a17f270c7e 8014240: G1: Add remembered set size information to output of G1PrintRegionLivenessInfo tschatzl parents: 10186 diff changeset	4563 G1PPRL_BYTE_H_FORMAT
05a17f270c7e 8014240: G1: Add remembered set size information to output of G1PrintRegionLivenessInfo tschatzl parents: 10186 diff changeset	4564 G1PPRL_BYTE_H_FORMAT
05a17f270c7e 8014240: G1: Add remembered set size information to output of G1PrintRegionLivenessInfo tschatzl parents: 10186 diff changeset	4565 G1PPRL_BYTE_H_FORMAT
05a17f270c7e 8014240: G1: Add remembered set size information to output of G1PrintRegionLivenessInfo tschatzl parents: 10186 diff changeset	4566 G1PPRL_DOUBLE_H_FORMAT
12080 5888334c9c24 7145569: G1: optimize nmethods scanning johnc parents: 10405 diff changeset	4567 G1PPRL_BYTE_H_FORMAT
10290 05a17f270c7e 8014240: G1: Add remembered set size information to output of G1PrintRegionLivenessInfo tschatzl parents: 10186 diff changeset	4568 G1PPRL_BYTE_H_FORMAT,
05a17f270c7e 8014240: G1: Add remembered set size information to output of G1PrintRegionLivenessInfo tschatzl parents: 10186 diff changeset	4569 "", "",
12080 5888334c9c24 7145569: G1: optimize nmethods scanning johnc parents: 10405 diff changeset	4570 "(bytes)", "(bytes)", "(bytes)", "(bytes/ms)",
5888334c9c24 7145569: G1: optimize nmethods scanning johnc parents: 10405 diff changeset	4571 "(bytes)", "(bytes)");
2435 371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4572 }
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4573
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4574 // It takes as a parameter a reference to one of the _hum_* fields, it
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4575 // deduces the corresponding value for a region in a humongous region
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4576 // series (either the region size, or what's left if the _hum_* field
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4577 // is < the region size), and updates the _hum_* field accordingly.
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4578 size_t G1PrintRegionLivenessInfoClosure::get_hum_bytes(size_t* hum_bytes) {
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4579 size_t bytes = 0;
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4580 // The > 0 check is to deal with the prev and next live bytes which
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4581 // could be 0.
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4582 if (*hum_bytes > 0) {
3986 65a8ff39a6da 7095194: G1: HeapRegion::GrainBytes, GrainWords, and CardsPerRegion should be size_t johnc parents: 3979 diff changeset	4583 bytes = MIN2(HeapRegion::GrainBytes, *hum_bytes);
2435 371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4584 *hum_bytes -= bytes;
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4585 }
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4586 return bytes;
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4587 }
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4588
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4589 // It deduces the values for a region in a humongous region series
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4590 // from the _hum_* fields and updates those accordingly. It assumes
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4591 // that that _hum_* fields have already been set up from the "starts
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4592 // humongous" region and we visit the regions in address order.
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4593 void G1PrintRegionLivenessInfoClosure::get_hum_bytes(size_t* used_bytes,
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4594 size_t* capacity_bytes,
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4595 size_t* prev_live_bytes,
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4596 size_t* next_live_bytes) {
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4597 assert(_hum_used_bytes > 0 && _hum_capacity_bytes > 0, "pre-condition");
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4598 *used_bytes = get_hum_bytes(&_hum_used_bytes);
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4599 *capacity_bytes = get_hum_bytes(&_hum_capacity_bytes);
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4600 *prev_live_bytes = get_hum_bytes(&_hum_prev_live_bytes);
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4601 *next_live_bytes = get_hum_bytes(&_hum_next_live_bytes);
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4602 }
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4603
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4604 bool G1PrintRegionLivenessInfoClosure::doHeapRegion(HeapRegion* r) {
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4605 const char* type = "";
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4606 HeapWord* bottom = r->bottom();
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4607 HeapWord* end = r->end();
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4608 size_t capacity_bytes = r->capacity();
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4609 size_t used_bytes = r->used();
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4610 size_t prev_live_bytes = r->live_bytes();
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4611 size_t next_live_bytes = r->next_live_bytes();
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4612 double gc_eff = r->gc_efficiency();
10290 05a17f270c7e 8014240: G1: Add remembered set size information to output of G1PrintRegionLivenessInfo tschatzl parents: 10186 diff changeset	4613 size_t remset_bytes = r->rem_set()->mem_size();
12080 5888334c9c24 7145569: G1: optimize nmethods scanning johnc parents: 10405 diff changeset	4614 size_t strong_code_roots_bytes = r->rem_set()->strong_code_roots_mem_size();
5888334c9c24 7145569: G1: optimize nmethods scanning johnc parents: 10405 diff changeset	4615
2435 371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4616 if (r->used() == 0) {
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4617 type = "FREE";
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4618 } else if (r->is_survivor()) {
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4619 type = "SURV";
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4620 } else if (r->is_young()) {
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4621 type = "EDEN";
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4622 } else if (r->startsHumongous()) {
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4623 type = "HUMS";
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4624
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4625 assert(_hum_used_bytes == 0 && _hum_capacity_bytes == 0 &&
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4626 _hum_prev_live_bytes == 0 && _hum_next_live_bytes == 0,
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4627 "they should have been zeroed after the last time we used them");
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4628 // Set up the _hum_* fields.
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4629 _hum_capacity_bytes = capacity_bytes;
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4630 _hum_used_bytes = used_bytes;
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4631 _hum_prev_live_bytes = prev_live_bytes;
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4632 _hum_next_live_bytes = next_live_bytes;
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4633 get_hum_bytes(&used_bytes, &capacity_bytes,
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4634 &prev_live_bytes, &next_live_bytes);
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4635 end = bottom + HeapRegion::GrainWords;
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4636 } else if (r->continuesHumongous()) {
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4637 type = "HUMC";
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4638 get_hum_bytes(&used_bytes, &capacity_bytes,
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4639 &prev_live_bytes, &next_live_bytes);
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4640 assert(end == bottom + HeapRegion::GrainWords, "invariant");
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4641 } else {
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4642 type = "OLD";
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4643 }
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4644
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4645 _total_used_bytes += used_bytes;
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4646 _total_capacity_bytes += capacity_bytes;
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4647 _total_prev_live_bytes += prev_live_bytes;
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4648 _total_next_live_bytes += next_live_bytes;
10290 05a17f270c7e 8014240: G1: Add remembered set size information to output of G1PrintRegionLivenessInfo tschatzl parents: 10186 diff changeset	4649 _total_remset_bytes += remset_bytes;
12080 5888334c9c24 7145569: G1: optimize nmethods scanning johnc parents: 10405 diff changeset	4650 _total_strong_code_roots_bytes += strong_code_roots_bytes;
2435 371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4651
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4652 // Print a line for this particular region.
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4653 _out->print_cr(G1PPRL_LINE_PREFIX
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4654 G1PPRL_TYPE_FORMAT
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4655 G1PPRL_ADDR_BASE_FORMAT
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4656 G1PPRL_BYTE_FORMAT
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4657 G1PPRL_BYTE_FORMAT
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4658 G1PPRL_BYTE_FORMAT
10290 05a17f270c7e 8014240: G1: Add remembered set size information to output of G1PrintRegionLivenessInfo tschatzl parents: 10186 diff changeset	4659 G1PPRL_DOUBLE_FORMAT
12080 5888334c9c24 7145569: G1: optimize nmethods scanning johnc parents: 10405 diff changeset	4660 G1PPRL_BYTE_FORMAT
10290 05a17f270c7e 8014240: G1: Add remembered set size information to output of G1PrintRegionLivenessInfo tschatzl parents: 10186 diff changeset	4661 G1PPRL_BYTE_FORMAT,
2435 371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4662 type, bottom, end,
12080 5888334c9c24 7145569: G1: optimize nmethods scanning johnc parents: 10405 diff changeset	4663 used_bytes, prev_live_bytes, next_live_bytes, gc_eff,
5888334c9c24 7145569: G1: optimize nmethods scanning johnc parents: 10405 diff changeset	4664 remset_bytes, strong_code_roots_bytes);
2435 371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4665
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4666 return false;
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4667 }
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4668
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4669 G1PrintRegionLivenessInfoClosure::~G1PrintRegionLivenessInfoClosure() {
10290 05a17f270c7e 8014240: G1: Add remembered set size information to output of G1PrintRegionLivenessInfo tschatzl parents: 10186 diff changeset	4670 // add static memory usages to remembered set sizes
05a17f270c7e 8014240: G1: Add remembered set size information to output of G1PrintRegionLivenessInfo tschatzl parents: 10186 diff changeset	4671 _total_remset_bytes += HeapRegionRemSet::fl_mem_size() + HeapRegionRemSet::static_mem_size();
2435 371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4672 // Print the footer of the output.
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4673 _out->print_cr(G1PPRL_LINE_PREFIX);
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4674 _out->print_cr(G1PPRL_LINE_PREFIX
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4675 " SUMMARY"
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4676 G1PPRL_SUM_MB_FORMAT("capacity")
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4677 G1PPRL_SUM_MB_PERC_FORMAT("used")
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4678 G1PPRL_SUM_MB_PERC_FORMAT("prev-live")
10290 05a17f270c7e 8014240: G1: Add remembered set size information to output of G1PrintRegionLivenessInfo tschatzl parents: 10186 diff changeset	4679 G1PPRL_SUM_MB_PERC_FORMAT("next-live")
12080 5888334c9c24 7145569: G1: optimize nmethods scanning johnc parents: 10405 diff changeset	4680 G1PPRL_SUM_MB_FORMAT("remset")
5888334c9c24 7145569: G1: optimize nmethods scanning johnc parents: 10405 diff changeset	4681 G1PPRL_SUM_MB_FORMAT("code-roots"),
2435 371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4682 bytes_to_mb(_total_capacity_bytes),
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4683 bytes_to_mb(_total_used_bytes),
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4684 perc(_total_used_bytes, _total_capacity_bytes),
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4685 bytes_to_mb(_total_prev_live_bytes),
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4686 perc(_total_prev_live_bytes, _total_capacity_bytes),
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4687 bytes_to_mb(_total_next_live_bytes),
10290 05a17f270c7e 8014240: G1: Add remembered set size information to output of G1PrintRegionLivenessInfo tschatzl parents: 10186 diff changeset	4688 perc(_total_next_live_bytes, _total_capacity_bytes),
12080 5888334c9c24 7145569: G1: optimize nmethods scanning johnc parents: 10405 diff changeset	4689 bytes_to_mb(_total_remset_bytes),
5888334c9c24 7145569: G1: optimize nmethods scanning johnc parents: 10405 diff changeset	4690 bytes_to_mb(_total_strong_code_roots_bytes));
2435 371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4691 _out->cr();
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4692 }

Mercurial > hg > truffle

annotate src/share/vm/gc_implementation/g1/concurrentMark.cpp @ 12229:ff218fdb30ba